19-5038; Rev 0; 1985 General Description The Maxim ICL7116 and ICL7117 are 3% digit monolithic analog to digital converters. They differ from the Maxim ICL7106 and 1CL7107 in that the |CL7116 and ICL7117 have a Hold pin which makes it possible to hold or freeze a reading. These integrating A/D converters have very high input impedances and directly drive LCD (ICL7116) and LED (ICL7117) displays. Versatility and accuracy are inherent features of these converters. The dual-slope conversion technique auto- matically rejects interference signals common in industrial environments. The true differential input is particularly useful when making ratiometric measure- ments (ohms or bridge transducers). Maxim has added a zero-integrator phase to the ICL7116 and ICL7117, eliminating overrange hangover and hysteresis effects. Finally, these devices offer high accuracy by lowering rollover error to less than one count and zero reading MAA AIL/SVI 3/2 Digit A/D Converter With Display Hold Features @ Improved 2nd Source! (See 3rd page for Maxim Advantage). @ Hold Pin Allows Indefinite Display Hold @ Guaranteed First Reading Recovery from Overrange # On Board Display Drive Capability No External Circuitry Required: LCD-ICL7116, LED-ICL7117 * High Impedance CMOS Differential Inputs * Low Noise (< 15uV p-p) Without Hysteresis or Overrange Hangover * Clock and Reference On-Chip * Zero Input Gives Zero Reading @ True Polarity Indication for Precision Null drift to less than 1pV/C. Applications Applications Ordering Information These devices can be used in a wide range of digital PART TEMP. RANGE PACKAGE panel meter applications. Most applications, however, , - involve the measurement and display of analog data: ICL7116CPL_ OPC to +70C 40 Lead Plastic DIP ICL7116CJL 0C to +70C 40 Lead Cerdip Pressure Conductance - - Voltage Current ICL7116CQ = OC to +70C 44 Lead Plastic Chip Carrier Resistance Speed ICL7116C/D 0C to +70C Dice Temperature Material Thickness ICL7117CPL OCto+70C 40. Lead Plastic DIP ICL7117CJL_ O to +70C 40 Lead Cerdip Typical Operating Circuit ICL7117CQ._ 0 to+70C ~44 Lead Plastic Chip Carrier ICL7117C/D -0C to +70C Dice Leo Pin Configuration DISPLAY _ moe Top View yo + HOLD C0] @ 140] OSC) ANALOG r > Ut - oc Fs] ste INPUT _ 1) 3] [33] DSC3 - J By 4] | 37] TEST A mae sh a fe MIA XL SI a ca Ea Ones I1CL7116 ey [33] CReF De a] [32] COMMON Ce 0] taxim = [EE INI av . Bef} /CL71716 [ao nto F WS ap Ge] ICL7117 Fa az Fo 03] [78] BUFF p & Oe [2] INT D3 [15] [25] V~ oo's 83 C8] [25] 62 |10'S) TO ANALOG | L a a t 100 3 Li8 23 3 COMMON |PIN 32) 1000'S ABg 03] Ea POL [20 [21 BP/GND (7116/7117) (MINUS SIGN} (Detailed Circuit DiagramSee last page) See last page for Plastic Chip Carrier Pin Configuration The "Maxim Advantage signifies an upgraded quality level. At no additional! cost we offer a second-source device that is subject to the following: guaranteed performance over temperature along with tighter test specifications on many key parameters: and device enhancements. when needed, that result in improved performance without changing the functionality. MAAXI/VI Maxim Integrated Products 1 ZELLZL/OLELLTOIICL7116/7117 3/2 Digit A/D Converter With Display Hold ABSOLUTE MAXIMUM RATINGS Supply Voltage ICL7116, VI TOV ccc cece cence cena e nen eenes 15V Power Dissipation (Note 2) Ceramic Package ......... cece cece eens 1000mWw ICL7117, V* to GND . +6V Cerdip Package .... 800mW ICL7W1Z VO tO GND ooo ccc cece tenes -9V Plastic Package ................0.. 800mW Analog Input Voltage (either input) (Note 1} .. Vito V7 Operating Temperature Range ... 0C to +70C Reference Inpuc Voltage (either input) .............5. Vt to V7 Storage Temperature Range ................ -65C to +160C Clock input Lead Temperature (soldering, 60 sec.) ................ +300C CO 0 <n Test to vt LO a a GND to v* Note 1: Input voltage may exceed supply voltages, provided the input current is limited to 1 100zA Note 2: Dissipation rating assumes device is mounted with all leads soldered to printed circuit board. Stresses above those listed under Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only and functionat operation of the device at these or any other conditions above those indicated in the operational sections of the specifications is not implied. Exposure io absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (note 3) CHARACTERISTICS CONDITIONS MIN TYP MAX UNITS i Zero Input Reading Vin = 0.0V "900.0 +000.0 +000.0 Digital Reading | Full Scale = 200.0mV : i Ratiometric Reading Vin = Veep = 100mv 999 999/1000 1000 | Digital Reading Rollover Error (Difference in -Vin = +Vin = 200.0mV -1 +0.2 + Counts Reading for Equal Postive and ' Negative Reading Near Full Scale Linearity (Max. Deviation from Full Scale = 200mV -1 +0.2 +1 Counts Best Straight Line Fit) or Full Scale = 2.000mV i | Common Mode Rejection Ratio Vom = 27, Vin = OV 50 i uv | (Note 4) Full Scale = 200.0mV : i Noise (Pk-Pk Value Not Exceeded Vi = OV . 15 nV 95% of the Time) Full Scale = 200.0mV : Leakage Current @ Input Vin = OV : 1 10 pA Zero Reading Drift Vin = OV, 0C < Ta< 70C : 0.2 1 uV/?C Scale Factor Temperature Vin = 199.0mV 1 5 ppm/C Coefficient oc<Ty< 70C (Ext. Ref. Oppm/C) j V* Supply Current (Does Not Vin =O 08 1.8 mA Include LED Current for 7117) | V~ Supply Current 7117 Only 0.6 1.8 mA Analog Common Voltage (With 250 Between Common & 2.4 28 3.2 Vv Respect to Pos. Supply) Pos. Supply _ Temp. Coeff. of Analog Common 250 Between Common & 80 ppm/C | (With Respect to Pos. Supply) Pos. Supply [ Input Resistance, Pin 1 (Note 6) 30 70 : kor font ! Vy. Pin 1 (7116 Only) TEST +15 | V Vit. Pin 1 (7117 Only) GND +1.5 Vv Vi. Pin 1 (Both) Vt -15 Vv 7116 Only (Note 5) Vt to Vv - 9V 4 5 ! 6 V Pk-Pk Segment Drive Voltage, i i Pk-Pk Backplane Drive Voltage 4 5 6 Vv 7117 Only (Except Pin 19) vt =5.0V 5 8.0 mA Segment Sinking Current | Segment Voltage = 3V (Pin 19 Only) | 10 16 Note 3: Unless otherwise noted, specifications apply to both the 7116 and 7117 at T, = 25C, foleck = 48kHz. 7116 is tested in the circuit of Figure 1, 7117 is tested in the circuit of Figure 2. Backplane drive is in phase with segment drive for off segment, 180 out of phase for on segment. Frequency is 20 times Note 4: Refer to Differential input" discussion. (See Maxim's |CL7106/ICL7107 data sheet) Note 5: conversion rate. Average DC component is less than 50mV. Note 6: The 7116 logic input has an internal pull-down resistor connected from HLDR, pin 1, to TEST, pin 37. The 7117 logic input has an internal pull-down resistor connected from HLDR, pint, to GROUND, pin 21. The electrical characteristics above are a reproduction of a portion of intersils copyrighted (1983/1984) data book. This information does not constitute any representation by Maxim that intersils products will perform in accordance with these specifications. The Electrical Characteristics Table along with descriptive excerpts from the orginat manufacturer's data sheet have been included in this data sheet solely for comparative purposes: 2 SM AXAILSVI@ Guaranteed Overload Recovery Time @ Significantly Improved ESD Protection (Note 8) # Low Noise (Vt = OV Ta = 28C, forock = MAALSVI 3! Digit A/D Converter With Display Hold @ Key Parameters Guaranteed Over Temperature @ Negligible Hysteresis # Maxim Quality and Reliability @ Increased Maximum Rating for Input Current (Note 9) ABSOLUTE MAXIMUM RATINGS: This device conforms to the Absolute Maximum Ratings on adjacent page. ELECTRICAL CHARACTERISTICS: Specifications below satisfy or exceed all tested parameters on adjacent page. 48kHz; test circuit - Figure 1 (1CL7116), Figure 2 (ICL7117) uniess noted) - PARAMETERS 1 CONDITIONS MIN TYP MAX UNITS | | Zero input Reading Vin = 0.0V, Full Scale = 200.0mV | i T, = 25C (Note 7) ~000.0 +000.0 +000.0 Digital oC <T, < 70C (Note 11) -000.0 000.0 +000.0 Reading Ratiometric Reading Vine Var = 100mV Ta = 25C (Note 7) 999 999/1000 1000 Digital oc<T,< 70C (Note 11) 998 999/1000 1001 i Reading Rollover Error (Difference in Viy = +Viy = 200.0mV [ , Reading for Equal Postive and T, = 25C (Note 7) -1 40.2 +1 Counts _ Negative Reading Near Full Scale) oC <= T, = 70C (Note 11) +0.2 if ' Linearity (Max. Deviation from Full Scale = 200mV -1 +0.2 +1 Counts i Best Straight Line Fit) | or Full Scale = 2.000mV + | ; Common Mode Rejection Ratio Vom = 1V, Vin = OV 50 | V/V ; Full Scale = 200.0mV | | Noise (Pk-Pk Value Not Exceeded Vin = OV 15 | 95% of the Time) Full Scale = 200.0mV Input Leakage Current | Vin = OV, T, = 25C (Note 7) 1 oc<sT, Ss 70C 20 j Zero Reading Drift Vin = OV ! OC = T, = 70C (Note 7) 0.2 i Scale Factor Temperature ny = 199.0mV | 1 Coefficient OC ST,as 70C | (Ext. Ref. Oppm/C) V* Supply Current Vin = ov (Does Not Include LED = 25C 0.8 Current for 7117) oc <T, 570C | Supply Current Supply Current TAN7 Only 2 0.68 Analog Common Voltage (With | 25kN Between Common & 2.4 2.8 | Respect to Pos. Supply) Pos. Supply | Temp. Coeft. of Analog Common 25k0Q Between Common & 75 | {with Re (With Respect to Pos. Supply) Pos. Supply ' Input Resistance, Pin 1 (Note 6) {o 30 70 | Vi. Pin 1 (7116 Only) TEST +1.5 v | Vj. Pin 1 (7117 Only) GND +15 Vv Vig. Pin 1 (Both) Vt 1.5 Vv 7 7 re 7116 Only (Note 5) V* to V- = 9V 4 5 6 i Vv Pk-Pk Segment Drive Voltage, Pk-Pk Backplane Drive Voltage a } 7117 Only (Except Pin 19) vt =5.0V 5 8.0 mA , Segment Sinking Current Segment Voltage = 3V | (Pin 19 Only) | 10 16 | mA 7116 Only Test Pin Voltage With Respect to ve 4 5 6 Vv Overload Recovery Time Vy changing from +10V 0 1 Measuement (Note 10) to OV Cycles | Note 7: Note 8: Method 3015.2) Note 9: adjacent page). Note 10: Note 11: MAAN Number of measurement cycles for display to give accurate reading. 1MQ resistor is removed in Figures 1 and 2. Test condition is V,,, applied between pins IN-HI and IN-LO. i-e., 1M resistor in Figures 1 and 2. All pins are designed to withstand electrostatic discharge (ESD) levels in excess of 2000V. (Test circuit per MIL. Std. 883C, Input voltages may exceed the supply voltage provided the input current is limited to +1mA {This revises Note 1 on the LELZ/OLLLZTOI1CL7116/7117 32 Digit A/D Converter With Display Hold Detailed Description The Maxim [CL7116 and ICL7117 3% digit A/D con- verter are similar to the Maxim !CL7106 and ICL7107, except for the addition of a Hold pin. For a detailed product description, package dimensions, and appli- cations information (other than the operation of the Hold pin described below) refer to Maxims [CL7106 and ICL7107 data sheet. Hold Input The Hold input is a digital input with a logic threshold approximately midway between V* and Test (ICL7116) or Vt and Ground (IGL7117). The ICL7116/7117 con- tinuously performs conversions, independent of the Hold input. When the Hold input is connected to V*, however, the display latch pulse is inhibited, and the the display latches are not updated. The Hold input has a 70 kilohm pulldown resistor to Test (ICL7116) or Ground (ICL7117) and the Hold input will be pulled low if itis left open. When Hold is low the 1CL7116/ICL7117 updates the display at the end of each conversion. The Hold input is CMOS compatible, and can also be driven by a switch connected to V (Figure 1 and 2) or by a PNP transistor. Unlike the 1CL7106 and the |CL7107, the ICL7116 and ICL7117 do not have a Reference Low input. Apply the reference voltage between Reference High (REF Hl) and Common. LoD 0.1 UF Display apis <<, =, oy] 2 ne ~ SEGMENTN LILiLt ANALOG D01,F ae ORIVE (LILILi INPUT 20 INLO POL 21 MINUS SIGN a BACKPLANE ap RIVE : HOLD ba, EN 28 BUFF 24 a7 04M Kae F 2 2 COMMON CLOSED - HOLD PEN = RUN = av 3 Az 36 VREF REF HI SOK) $ 2 0.22. 2 4 int Osc, 39738 cose 40 osc, ost; MAKIM ICL7116 TO ANALOG COMMON 1PIN 32% Bose 100K? 100 nF Figure 1. Maxim 1CL7116 Typical Operating Circuit, 200mV Reference Chip Topography Dg Ep Fo Ap By C2 Up Ey & Fy BP/GAO A/l INT Vo BUFF IN LO COMMON C* per 0.130" (3.30mm) aut wpitys LED Display er : Crer Creer Ow W9Y ins 2iafsecmenty tit ANALOG O01LF 22 2h LORIVE (LILiti INPUT 30 20 - ILO POL ono 32 = COMMON = 1 oe CLOSED = HO.D OF? opeR- RUN . ov 238 BUFF 24 Kel are: Oar AR ab YREF 29 t > O22uF REF HI 5 OK! 2) iNT REF LO 26 v ase, osc, ose, Oo 39738 rice [40 MAKIM tH ICL?7117 Huge . TC ANALOS WA COMMON IPIN 37) TAG Ee 100 sr Figure 2. Maxim ICL7117 Typical Operating Circuit, 200mV Reference Pin Configuration = Bo 6 ee 135) vt 33} C* ner 37] C~per Hs COMMON 35] IN HI MAKiM 34] NC 1CL7116 [33] IN LO 132] A/Z [31] BUFF [30] INT 29} v- ICL7 197 44 Lead Plastic Chip Carrier (Quad Pack) Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circul patent licenses are implica. Maxim reserves the right to change the circultry and specifications without notice at any tme. 4 Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 1994 Maxim Integrated Products Printed USA MAXIMA js a registered trademark of Maxim Integrated Products