MAX9546/MAX9547 General Description The MAX9546/MAX9547 differential interface chipset converts single-ended voltages to differential voltages for transport and then converts back to single-ended voltages. These devices eliminate costly, bulky, single-ended coaxial cables with inexpensive, readily available, differential shielded (ScTP) or unshielded (UTP) twisted pairs. The fault detection of the MAX9546 and loss-of-signal detection of the MAX9547 allow proactive and speedy diagnosis, such as identifying failures in the manufacturing stage and troubleshooting equipment at repair facilities. The MAX9546/MAX9547 are low-cost, convenient solutions for transporting CVBS/FBAS analog video signals (PAL or NTSC) through hostile environments. The MAX9546 driver converts the single-ended input into a differential output with a 6dB fixed gain to drive a backterminated, DC-coupled differential video output to unity gain. This DC connection allows the detection of a shortcircuit condition at the differential outputs. The FAULT output indicates a short-circuit condition including a short to a high battery condition (VBAT = +16V) or ground. The MAX9547 receiver converts the differential signal from the MAX9546 into a single-ended signal. Like the MAX9546 output, the MAX9547 input survives a short to a high battery condition or ground. The MAX9547 receiver loss-of-signal output (LOS) operates by detecting the H-Sync and thus can support both monochrome and color video signals. The MAX9547 gain is set with an external impedance between ZT+ and ZT-. The MAX9546/MAX9547 operate from a 7.5V to 10V single supply. Both devices include 15kV ESD Human Body Model (HBM) protection. The MAX9546/MAX9547 are offered in a thermally enhanced 8-pin SO package and specified over the -40C to +85C extended temperature range. Applications Security/CCTV Video Avionics/In-Flight Entertainment 19-3873; Rev 4; 9/14 Differential Video Interface Chipset Features Fault Detection (MAX9546) Loss-of-Signal Detection (MAX9547) Tolerate 2V Ground-Level Shift between Source and Load 15kV ESD Protection (Human Body Model) 8kV-IEC 1000-4-2 Contact Discharge 15kV-IEC 1000-4-2 Air-Gap Discharge Preset 6dB Gain (MAX9546) Variable Receiver Gain (MAX9547) 7.5V to 10V Single-Supply Operation Ordering Information PART PINPACKAGE MAX9546ESA+ 8 SO-EP* S8E-14 Driver MAX9547ESA+ 8 SO-EP* S8E-14 Receiver PKG CODE DESCRIPTION Note: These devices are specified for -40C to +85C temperature range. +Denotes a lead-free package. *EP = Exposed paddle. Pin Configuration appears at end of data sheet. Typical Operating Circuit VCC VCC ZT+ MAX9547 MAX9546 ZTOUT+ IN+ OUT- IN- IN IOUT CLAMP FAULT LOS VOUT MAX9546/MAX9547 Differential Video Interface Chipset Absolute Maximum Ratings (Voltages are referenced GND.) VCC to GND........................................................ -0.3V to +11V IN and FAULT (MAX9546)....................... -0.3V to (VCC + 0.3V) OUT+, OUT- (MAX9546) (Note 1).............................-2V to +16V FAULT Short-Circuit Duration to VCC or GND (MAX9546)........................................Continuous IN+, IN- (MAX9547) (Note 1)....................................-2V to +16V IOUT, LOS, ZT+, ZT- (MAX9547).............. -0.3V to (VCC + 0.3V) Differential Input Voltage (|VIN+ - VIN-|) (MAX9547)..............+5V IOUT, LOS Short-Circuit Duration to VCC or GND (MAX9547)........................................Continuous Continuous Power Dissipation (TA = +70C) 8-Pin SO-EP (derate 24.4mW/C above +70C).....1951.2mW JC (Note 2)....................................................................7.0C/W JA.................................................................................41.0C/W Operating Temperature Range............................ -40C to +85C Junction Temperature...................................................... +150C Storage Temperature Range............................. -65C to +150C Lead Temperature (soldering, 10s).................................. +300C Note 1: The Absolute Maximum Ratings of OUT+/OUT- for the MAX9546 and IN+/IN- for the MAX9547 are based on a single-fault condition, i.e. only one output of MAX9546 (or both outputs together) is shorted to the battery, VCC or GND. The devices will not survive a double-fault condition, i.e. OUT+ and OUT- shorted to different supplies. Note 2: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial. Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. DC Electrical Characteristics-MAX9546 (VCC = +8.5V, RL = 220 between OUT+ and OUT-, TA = -40C to +85C. Typical values are at TA = +25C, unless otherwise noted.) (Note 3) PARAMETER SYMBOL CONDITIONS Supply Voltage Range VCC Guaranteed by PSRR Quiescent Supply Current ICC No load Voltage Gain AV VIN = 1.2VP-P (Note 4) Input-Voltage Swing VIN Guaranteed by AV Input Clamp Voltage VCLMP (Note 5) Input Clamp Current ICLMP (Note 5) Input Resistance RIN Output Common-Mode Voltage VCOM Output Impedance ROUT Output Fault Current Power-Supply Rejection Ratio FAULT Output Logic Level FAULT Output Leakage Current www.maximintegrated.com IF(OUT) PSRR MIN TYP MAX 7.5 8.5 10.0 V 64 112 mA 2 2.2 V/V 1.2 VP-P 1.8 3.46 7 (Notes 5, 6) V 13 500 3.0 3.25 9 OUT+ and/or OUT- to + (VCC - 2V) 2 OUT+ and/or OUT- to +2V 4 OUT+ and/or OUT- to -2V 7 OUT+ and/or OUT- to +16V, VCC unconnected 6 OUT+ or OUT- to -2V, VCC unconnected 24 VCC from 7.5V to Differential mode 10V (Note 7) Common mode 45 62 46 52 VOL, ISINK = 1.6mA (Note 8) 3.4 V mA dB 0.4 0.01 A k 0.1 OUT+ and/or OUT- to +16V UNITS V A Maxim Integrated 2 MAX9546/MAX9547 Differential Video Interface Chipset AC Electrical Characteristics-MAX9546 (VCC = +8.5V, RL = 220 across OUT+ and OUT-, TA = -40C to +85C. Typical values are at TA = +25C, unless otherwise noted.) (Note 3) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Large-Signal Bandwidth VIN = 1VP-P, -3dB 18 MHz Large-Signal Flatness VIN = 1VP-P, 0.5dB 15 MHz OUT+ - OUT- 70 V/s Slew Rate Settling Time (0.1%) SR tSETTLING VIN = 1VP-P Power-Supply Rejection Ratio PSRR Common-Mode Balance (Note 9) CMB Droop 400 ns f = 100kHz, 100mVP-P ripple 63 dB f = 100kHz 55 f = 3.58MHz 39 Guaranteed by input current 1 dB % Differential Gain DG (Note 10) 1.37 % Differential Phase DP (Note 10) 0.14 degrees SNR SNR (dBRMS) (Note 10) -62 dB 2T Pulse to Bar Rating (Note 10) -0.22 %KF 2T Pulse Response (Note 10) 0.30 %KF At 3.58MHz (Note 10) Group Delay 2.20 ns Horizontal Tilt D/dt (Notes 10, 15) 0 % Vertical Tilt (Notes 10, 15) 6.62 % DC Electrical Characteristics-MAX9547 (VCC = +8.5V, GND = 0V, RL = 75, ZZT = 75, TA = -40C to +85C. Typical values are at TA = +25C.) (Note 3) PARAMETER SYMBOL Supply Voltage Range VCC Supply Current ICC Differential Input Voltage Range |IN+ - IN-| Common-Mode Input Voltage Range Input Current CONDITIONS Guaranteed by PSRR VIN(P-P) Guaranteed by CMRR (Note 11) VCOM Guaranteed by CMRR (Note 11) IIN Input Resistance RIN Differential Voltage Gain AV VIN(P-P) = 1.2V, defined as IOUT x (RL / VIN) Output Voltage VOB Output Voltage Swing VOUT IOUT Power-Supply Rejection Ratio PSRR Common-Mode Rejection Ratio CMRR www.maximintegrated.com TYP MAX UNITS 7.5 8.5 10.0 V 70 110 mA 1.2 VP-P 5.4 V 6 30 A 1 4.2 1.0 IIN Input Offset Current Maximum Output Current MIN 80 0.90 IN+ = IN- = 3.2V 1 1.15 V/V 1.2 VP-P 1 VIN = 1V, ZZT = 0 A k V 21 mA VCC from 7.5V to 10V 26 34 dB 1V VCOM 5.4V 42 54 2V VCOM 4.4V 46 70 dB Maxim Integrated 3 MAX9546/MAX9547 Differential Video Interface Chipset DC Electrical Characteristics-MAX9547 (continued) (VCC = +8.5V, GND = 0V, RL = 75, ZZT = 75, TA = -40C to +85C. Typical values are at TA = +25C.) (Note 3) PARAMETER SYMBOL CONDITIONS MIN VOL, ISINK = 1.6mA (Note 12) LOS Logic Level MAX UNITS 0.4 V 0.01 LOS Leakage Current Input Fault Current TYP IF IN+ and/or IN- to +16V, RT1 + RT2 = 110 50 IN+ and/or IN- to -2V, RT1 + RT2 = 110 10 IN+ and/or IN- to +16V, VCC unconnected, RT1 + RT2 = 110 72 IN+ and/or IN- to -2V, VCC unconnected, RT1 + RT2 = 110 10 A mA AC Electrical Characteristics-MAX9547 (VCC = +8.5V, GND = 0V, RL = 75, ZZT = 75, CL = 50pF, TA = -40C to +85C, Typical values are at TA = +25C.) (Note 3) PARAMETER SYMBOL Large-Signal Bandwidth Large-Signal Flatness Slew Rate Settling Time (0.1%) CONDITIONS MIN TYP MAX UNITS VIN = 1VP-P, -3dB 20 MHz VIN = 1VP-P, 0.5dB 15 MHz 50 V/s SR 400 ns Power-Supply Rejection Ratio tSETTLING PSRR f = 100kHz, 100mVP-P ripple 30 dB Common-Mode Rejection Ratio CMRR f = 100kHz, 100mVP-P ripple 53 dB LOS Timeout Period tLOS 760 s Differential Gain DG (Notes 13, 14) 2.65 % DP (Notes 13, 14) 0.57 degrees SNR (Notes 13, 14) -72 dB (Notes 13, 14) -0.06 %KF (Notes 13, 14) 0.40 %KF 0 ns Differential Phase SNR (dBRMS) 2T Pulse to Bar Rating 2T Pulse Response Group Delay D/dt At 3.58MHz (Notes 13, 14) Horizontal Tilt (Notes 13, 14, 15) 0.10 % Vertical Tilt (Notes 13, 14, 15) 1.16 % www.maximintegrated.com Maxim Integrated 4 MAX9546/MAX9547 Differential Video Interface Chipset AC ELECTRICAL CHARACTERISTICS--MAX9546 Driving MAX9547 (VCC = +8.5V, RL = 220 across OUT+ and OUT-, RL = 75 (MAX9547), ZZT = 75, TA = -40C to +85C. Typical values are at TA = +25C, unless otherwise noted.) (Note 3) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Differential Gain DG 3.8 % Differential Phase DP 0.6 degrees 5MHz lowpass, 100kHz highpass, VIN = 1VP-P 80 dB 2T Pulse-to-Bar Rating 2T = 250ns, bar time is 18s, the beginning 3.5% and the ending 3.5% of the bar time is ignored 0.2 % 2T Pulse Response 2T = 250ns 0.25 % Signal-to-Noise Ratio Group Delay SNR 10 ns Horizontal Tilt (Note 15) 0.12 % Vertical Tilt (Note 15) 0.26 % Note Note Note Note D/dt At 3.58MHz 3: 4: 5: 6: All devices are 100% production tested at TA = +25C. All temperature limits are guaranteed by design. Defined as differential output to single-ended input. Input is AC-coupled. The RC time constant (3Hz) formed by the source resistance (RS) and coupling capacitor (CIN) is usually used for lead compensation of the active clamp. The source resistance is 400 max. The clamp should remain stable in this condition. Note 7: Differential mode is measured as (OUT+ - OUT-). Common mode is measured as OUT+ + OUT 2 Note 8: A fault is when the outputs both sink and source current and the amount of extra current sink or source is greater than 3mA. Note 9: Common-mode balance is measured as 20log((OUT+ - OUT-) / (OUT+ + OUT-)). 2 Note 10: These results were measured with a MAX4144 receiver, other receivers may affect results. Note 11: Ground between MAX9546 and MAX9547 can be a 2V difference. Note 12: A loss-of-signal is when the input video signal of the MAX9547 does not change (cross 100mV level from sync tip) for 10 video lines. Note 13: These results were measured with a MAX4447 transmitter and a MAX4012 buffer amplifier with a gain of 4. Using other devices may affect results. Note 14: MAX9547 topology shown in Figure 3. Note 15: Input capacitor for this test is 0.33F. www.maximintegrated.com Maxim Integrated 5 MAX9546/MAX9547 Differential Video Interface Chipset Typical Operating Characteristics (VCC = +8.5V, RL = 220 between OUT+ and OUT-, RL = 75 (MAX9547), ZZT = 75, TA = +25C, unless otherwise noted.) 10 MAX9547 IOUT CURRENT vs. TEMPERATURE VIN = 1VP-P 7 25 6 MAX9546 toc03 MAX9546 toc01 MAX9546 GAIN vs. TEMPERATURE 8 MAX9546 toc02 GAIN vs. FREQUENCY 20 23 MAX9547 -10 MAX9546 4 IIOUT (mA) 0 GAIN (dB) GAIN (dB) 5 3 MAX9547 2 21 19 1 -20 0 17 -1 -30 0.001 1 -2 10 -15 -40 -10 35 60 15 85 -15 -40 10 35 60 FREQUENCY (MHz) TEMPERATURE (C) TEMPERATURE (C) MAX9547 COMMON-MODE REJECTION RATIO vs. FREQUENCY MAX9547 COMMON-MODE REJECTION RATIO vs. TEMPERATURE MAX9546 INPUT CLAMP CURRENT vs. TEMPERATURE -20 -30 -30 -50 -50 -60 -60 -70 -70 -80 0.0001 -80 0.001 0.01 0.1 1 10 VCOM = 2V -40 8 7 VCOM = 5.4V -40 -15 10 35 60 5 -40 85 -15 TEMPERATURE (C) 60 85 140 120 100 80 60 40 20 MAX9546 toc08 160 200 180 DIFFERENTIAL ROUT (m) 180 35 MAX9546 DIFFERENTIAL OUTPUT RESISTANCE vs. TEMPERATURE MAX9546 toc07 200 10 TEMPERATURE (C) MAX9547 DIFFERENTIAL INPUT RESISTANCE vs. TEMPERATURE DIFFERENTIAL RIN (k) 9 6 FREQUENCY (MHz) 0 10 ICLMP (A) -10 -20 -40 VRIPPLE = 100mVP-P fRIPPLE = 10kHz 85 MAX9546 toc06 0 MAX9546 toc05 VRIPPLE = 100mVP-P CMRR (dB) CMRR (dB) -10 0.1 MAX9546 toc04 0 0.01 160 140 120 100 80 60 40 20 -40 -15 10 35 TEMPERATURE (C) www.maximintegrated.com 60 85 0 -40 -15 10 35 60 85 TEMPERATURE (C) Maxim Integrated 6 MAX9546/MAX9547 Differential Video Interface Chipset Typical Operating Characteristics (continued) (VCC = +8.5V, RL = 220 between OUT+ and OUT-, RL = 75 (MAX9547), ZZT = 75, TA = +25C, unless otherwise noted.) -20 MAX9547 -40 -50 -60 MAX9547 -30 PSRR (dB) PSRR (dB) -20 -30 VRIPPLE = 100mVP-P fRIPPLE = 100kHz -10 -40 -50 MAX9546 MAX9546 -60 -70 -70 -80 0.0001 0.001 0.01 0.1 1 -80 10 -40 FREQUENCY (MHz) -15 10 35 60 85 TEMPERATURE (C) -30 -40 -50 0.001 0.01 0.1 1 FREQUENCY (MHz) MAX9546 toc13 40 1 2 3 4 5 6 1.0 10 0.6 30 20 10 0 0.2 -0.2 -10 -0.6 1 2 3 4 5 1 10 FREQUENCY (MHz) 6 SIGNAL-TO-NOISE RATIO vs. FREQUENCY (MAX9546 DRIVING MAX9547) OUTPUT RESPONSE TO NTC-7 VIDEO TEST SIGNAL (MAX9546 DRIVING MAX9547) MAX9546 toc14 0 -10 MAX9546 INPUT 500mV/div -20 -30 -40 SNR (dB) MAX9547 OUTPUT 500mV/div 10s/div 0.1 MAX9546 toc15 DIFFERENTIAL PHASE (deg) -20 50 GROUP DELAY (ns) DIFFERENTIAL GAIN (%) MAX9546 toc12 DIFFERENTIAL PHASE (MAX9546 DRIVING MAX9547) -1.0 -10 GROUP DELAY vs. FREQUENCY (MAX9546 DRIVING MAX9547) DIFFERENTIAL GAIN (MAX9546 DRIVING MAX9547) 5 4 3 2 1 0 -1 -2 -3 0 COMMON-MODE BALANCE (dB) VRIPPLE = 100mVP-P MAX9546 COMMON-MODE BALANCE vs. FREQUENCY MAX9546 toc10 -10 0 MAX9546 toc09 0 POWER-SUPPLY REJECTION RATIO vs. TEMPERATURE MAX9546 toc11 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY -50 -60 -70 -80 -90 -100 110 -120 0.1 1 10 FREQUENCY (MHz) www.maximintegrated.com Maxim Integrated 7 MAX9546/MAX9547 Differential Video Interface Chipset Pin Description (MAX9546) PIN NAME 1, 8 VCC FUNCTION 2 IN 3 FAULT 4, 5 GND Ground 6 OUT- Negative Differential Output 7 OUT+ Positive Differential Output EP EP Power Supply. Connect together and bypass with a 0.1F in parallel with a 4.7F capacitor to GND. Video Input Fault Indicator. Active-low, open-drain output. FAULT = low when fault is detected at the output. FAULT = high when no fault is detected at the output. Exposed Paddle. Connect to GND. Pin Description (MAX9547) PIN NAME 1 IN+ Positive Differential Input FUNCTION 2 ZT+ Positive Transconductance Terminal 3 ZT- Negative Transconductance Terminal 4 IN- Negative Differential Input 5 GND Ground 6 LOS Loss-of-Signal Indicator. Active-low, open-drain output. LOS = low when no signal is detected at the input. LOS = high when signal is present at the input. 7 IOUT Current Output 8 VCC Power Supply. Bypass with a 0.1F capacitor in parallel with a 4.7F capacitor to GND. EP EP Exposed Paddle. Connect to GND. Detailed Description The MAX9546/MAX9547 differential interface chipset converts single-ended voltages to differential voltages for transport and then converts back to single-ended voltages. The chipset is optimized for transporting CVBS/FBAS analog video signals (PAL or NTSC) through hostile environments. The MAX9546 driver includes a fault output (FAULT) that indicates shorted transmission cables. The MAX9547 receiver loss-of-signal output (LOS) indicates an absence of input signal. The MAX9546/MAX9547 operate from a 7.5V to 10V single supply. The differential interface is immune to shortcircuit conditions to supply (VCC), or ground. These devices include 15kV ESD (Human Body Model) protection. www.maximintegrated.com MAX9546 Driver The MAX9546 driver converts a single-ended video input into a differential output for transport across a twisted pair of wires. The input is AC-coupled and the video signal sync tip is clamped at 3.46V to set the voltage of the input. The output common-mode voltage is optimized to reject ground differences between the MAX9546 and MAX9547 up to 2V. The differential gain is internally set to 2V/V to drive a back-terminated output to unity gain. The maximum input resistance should not exceed 400 to ensure device stability. Maxim Integrated 8 MAX9546/MAX9547 Differential Video Interface Chipset Common-Mode Balance A driver is typically specified as having a property called common-mode balance (CMB), longitudinal balance, or simply line imbalance. Although balance is associated with the source, it assumes a perfectly balanced, correctly terminated, differential load. Common-mode balance is a measure of the ratio between the differential to the common-mode output in decibels as shown below. (OUT +) - (OUT -) CMB = 20Log (OUT +) + (OUT -) 2 Common-mode balance is dominated by the gain-bandwidth product at high frequencies and the output resistance at low frequencies; therefore, it is important to specify CMB over a frequency range. The receiver-side balance is determined by the common-mode rejection ratio (CMRR). The CMRR is usually quite large compared to the CMB; therefore, the CMB is the limiting factor. Fault Protection and Detection The MAX9546 fault protection insures the driver outputs survive a short to any voltage from -2V to +16V and are ESD-protected to 15kV HBM. Faults are indicated by an open-drain fault output (FAULT) being asserted low and requires a pullup resistor from FAULT to VCC. MAX9547 Receiver The MAX9547 receiver is a differential-to-single-ended converter that removes any common-mode input. The unique architecture allows the signal gain to be set by a ratio of two impedances: the user-selected transconductance element or network (ZZT), and an output load resistance, RL. The gain is set by a fixed internal current gain (K) and the ratio of ZZT and RL. The ZT terminals can be bridged with a complex impedance to provide lead-lag compensation. The output is essentially a voltage-controlled current source as shown in Figure 1. The MAX9547 output is a current proportional to the differential input voltage, and inversely proportional to the impedance of the user-selected transconductance network, ZZT. The current output provides inherent short-circuit protection for the output terminal. A differential input voltage applied to the input terminals causes current to flow in the transconductance element (ZZT), which is equal to VIN /ZZT. This current in the transconductance element is multiplied by the preset current gain (K) and appears on the output terminal as a current equal to (K) x (VIN /ZZT). This current flows through the load impedance to produce an output voltage according to the following equation: www.maximintegrated.com IN+ 1 + IOUT 7 VIN IN- VIN 4 K ZZT Figure 1. Operational Mode V VOUT = K IN R L Z ZT where K = current-gain ratio (K = 1 for MAX9547), RL = output load impedance, ZZT = transconductance element impedance, VIN = differential input voltage. Loss-of-Signal The receiver includes an LOS output to indicate a signal by detecting the presence of H-Sync. This allows the MAX9547 to be used with monochrome or color video. LOS is an open-drain output and requires a pullup resistor from LOS to VCC. Setting the Circuit Gain The MAX9547 produces an output current by multiplying the differential input voltage, VIN, by the transconductance ratio, K (RL / ZZT), where K = 1. The voltage gain (AV) is set by the impedance of the transconductance network (ZZT) and the output load impedance (RL) according to the following formula: R AV =K L Z ZT The factor ZZT is the impedance of the user-selected, twoterminal transconductance element or network, connected across the terminals labeled ZT+ and ZT-. The network ZZT is selected, along with the output impedance RL, to provide the desired circuit gain and frequency shaping. To maintain linearity, the transconductance network should also be selected so that current flowing through it, equal to VIN / ZZT, does not exceed 18mA under worst-case conditions of maximum input voltage and minimum transconductance element impedance (ZZT). Output current should not exceed 8.8mA except under fault conditions. Maxim Integrated 9 MAX9546/MAX9547 Differential Video Interface Chipset Applications Information brands entirely. The overall performance of the MAX9546/ MAX9547 is dependent on the choice of the receiver or transmitter, respectively. Differential Interface The impedances of the differential interface are made up of the two source resistors on the driver (MAX9546) shown as RS and the load resistors on the receiver (MAX9547) shown as RT in the Typical Application Circuit. These resistors are chosen so their sum matches the characteristic impedance (Z0) of the differential transmission line. For example, a Category 5 cable has a characteristic impedance of 110, so the sum of the two RS or RT resistors must be 110 to correctly drive the line. To balance the signals they must be equal, so RS and RT are 55 each. Figure 2 illustrates one possible topology for the MAX9546 when using other devices with different offset requirements. Figures 3 and 4 illustrate two possible topologies for the MAX9547 when using other devices with unknown or different offset requirements. The circuit shown in Figure 3 has a smaller PCB footprint at the expense of requiring higher DC offset currents from the source device. Figure 4 requires no DC offset currents although it has a larger PCB footprint. When using the MAX9546 with AC-coupling capacitors, the FAULT signal will continue to function but only with respect to a DC short condition. The LOS signal from the MAX9547 is unaffected by coupling capacitors. Using Other Transmitters and Receivers The MAX9546/MAX9547 are used with other transmitters and receivers; either other MAXIM devices or other VDD R1 3.92k 0.1F 4.7F +3.2 VDC OFFSET D1 3 2 R4 75 C4 0.33F FAULT 1 8 VCC VCC U1 MAX9546 IN OUT+ C3 470F 0V OFFSET OUT- GND 4 7 R2 55 6 GND 5 R3 55 TO A DEVICE OTHER THAN A MAX9547 USING CAT5, ETC. C5 470F +3.2 VDC OFFSET Figure 2. Suggested MAX9546 Configuration for Use with Other Devices www.maximintegrated.com Maxim Integrated 10 MAX9546/MAX9547 Differential Video Interface Chipset +8V 0.1F 75 Zt OPTIONAL EQ NETWORK FOR LONG CABLE RUNS 2 3 1 0V OFFSET C3 22F 4 R3 10k 4.7F 3.92k 8 VCC ZTP ZTN IP U1 MAX9547 IN GND 5 LOS IOUT 6 D1 LED 7 75 R4 110 TO A DEVICE OTHER THAN A MAX9546 USING CAT5, ETC. 0V OFFSET R6 10k C4 22F +3.2 VDC OFFSET 3.2V LOW-NOISE REFERENCE 10F 0.1F Figure 3. Suggested MAX9547 Configuration When Using Other Devices www.maximintegrated.com Maxim Integrated 11 MAX9546/MAX9547 Differential Video Interface Chipset +8V 0.1F 75 Zt OPTIONAL EQ NETWORK FOR LONG CABLE RUNS 2 3 1 0V OFFSET C3 470F TO A DEVICE OTHER THAN A MAX9546 USING CAT5, ETC. 0V OFFSET R3 51 R805 C4 470F 4 4.7F 3.92k 8 VCC ZTP ZTN IP U1 MAX9547 IN GND 5 LOS IOUT 6 D1 LED 7 75 R5 51 R805 +3.2 VDC OFFSET 3.2V LOW-NOISE REFERENCE 100F 0.1F Figure 4. Alternate MAX9547 Configuration for Use with Other Devices www.maximintegrated.com Maxim Integrated 12 MAX9546/MAX9547 Differential Video Interface Chipset 15kV ESD Protection As with all Maxim devices, ESD-protection structures are incorporated on all pins to protect against electrostatic discharges encountered during handling and assembly. The driver outputs and receiver inputs have extra protection against static electricity. Maxim's engineers developed state-of-the-art structures to protect these pins against ESD of 15kV without damage. The ESD structures withstand high ESD in all states: normal operation and powered down. After an ESD event, the MAX9546/ MAX9547 keep working without latchup. ESD protection can be tested in various ways; the driver outputs and receiver inputs of this product family are characterized for protection to 15kV using the Human Body Model. Other ESD test methodologies include IEC 1000-4-2 Contact RC 1M CHARGE-CURRENTLIMIT RESISTOR HIGHVOLTAGE DC SOURCE Cs 100pF RD 1.5k Figure 5. Human Body ESD Test Model www.maximintegrated.com ESD Test Conditions ESD performance depends on a variety of conditions. Contact Maxim for a reliability report that documents test setup, test methodology, and test results. Human Body Model Figure 5 shows the Human Body Model, and Figure 6 shows the current waveform it generates when discharged into a low impedance. This model consists of a 100pF capacitor charged to the ESD voltage of interest, which is then discharged into the test device through a 1.5k resistor. IP 100% 90% DISCHARGE RESISTANCE STORAGE CAPACITOR Discharge and IEC 1000-4-2 Air-Gap Discharge (formerly IEC 801-2). PEAK-TO-PEAK RINGING (NOT DRAWN TO SCALE) Ir AMPERES DEVICE UNDER TEST 36.8% 10% 0 0 tRL TIME tDL CURRENT WAVEFORM Figure 6. Human Body Current Waveform Maxim Integrated 13 MAX9546/MAX9547 Differential Video Interface Chipset IEC 1000-4-2 The IEC 1000-4-2 standard covers ESD testing and performance of finished equipment; it does not specifically refer to integrated circuits (Figure 7). The major difference between tests done using the Human Body Model and IEC 1000-4-2 is higher peak current in IEC 1000-4-2, because series resistance is CHARGE-CURRENTLIMIT RESISTOR HIGHVOLTAGE DC SOURCE Cs 150pF I RD 330W 100% 90% DISCHARGE RESISTANCE STORAGE CAPACITOR Figure 7.IEC 1000-4-2 ESD Test Model DEVICE UNDER TEST IPEAK RC 50 to 100 lower in the IEC 1000-4-2 model. Hence, the ESD withstand voltage measured to IEC 1000-4-2 is generally lower than that measured using the Human Body Model. Figure 8 shows the current waveform for the 8kV IEC 1000-4-2 ESD Contact-Discharge test. The Air-Gap test involves approaching the device with a charged probe. The Contact-Discharge method connects the probe to the device before the probe is energized. 10% tr = 0.7ns TO 1ns t 30ns 60ns Figure 8. IEC 1000-4-2 ESD Generator Current Waveform www.maximintegrated.com Maxim Integrated 14 MAX9546/MAX9547 Differential Video Interface Chipset Typical Application Circuit 7.5V TO 10V 7.5V TO 10V 4.7F 0.1F GND1 4.7F 0.1F VCC VCC GND2 VCC 4.7k 4.7k ZT+ ZZT 75 FAULT LOS ZT- MAX9546 75 CIN 0.33F OUT+ IN OUT- 75 AC MAX9547 RS 55 GND GND1 IN+ RS 55 IOUT INRT2 55 RT1 55 GND VOUT RL 75 GND GND2 CT 1F TO 47F GND1 GND1 GND2 GND2 NOTE: TYPICAL APPLICATION CIRCUIT FOR 110 UNSHIELDED (UTP) CABLE WITH AN OVERALL UNITY GAIN IN A 75 VIDEO APPLICATION. Pin Configurations TOP VIEW MAX9547 MAX9546 + 8 VCC IN+ 1 IN 2 7 OUT+ ZT+ 3 6 OUT- ZT- GND 4 5 GND VCC 1 FAULT SO-EP + 8 VCC 2 7 IOUT 3 6 LOS IN- 4 5 GND SO-EP Chip Information PROCESS: BiCMOS www.maximintegrated.com Maxim Integrated 15 MAX9546/MAX9547 Differential Video Interface Chipset Package Information For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a "+", "#", or "-" in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO. 8 SO-EP S8E+14 21-0111 90-0151 www.maximintegrated.com Maxim Integrated 16 MAX9546/MAX9547 Differential Video Interface Chipset Revision History REVISION NUMBER REVISION DATE DESCRIPTION PAGES CHANGED 4 9/14 Removed automotive references from Applications and Detailed Description sections 1, 8 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated's website at www.maximintegrated.com. Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. (c) 2014 Maxim Integrated Products, Inc. 17