General Description
The MAX5386/MAX5388 dual, 256-tap, volatile, low- volt-
age linear taper digital potentiometers offer three end-
to-end resistance values of 10kΩ, 50kΩ, and 100kΩ.
Operating from a single +2.6V to +5.5V power supply
these devices provide a low 35ppm/°C end-to-end tem-
perature coefficient. The devices feature an SPI interface.
The small package size, low supply voltage, low sup-
ply current, and automotive temperature range of the
MAX5386/MAX5388 make the devices uniquely suitable
for the portable consumer market and battery-backup
industrial applications.
The MAX5386 includes two digital potentiometers in a
voltage-divider configuration. The MAX5388 includes
one digital potentiometer in a voltage-divider configura-
tion and one digital potentiometer in a variable-resistor
configuration. The MAX5386/MAX5388 are specified over
an extended -40°C to +125°C temperature range and are
available in 16-pin, 3mm x 3mm TQFN or 10-pin, 3mm x
5mm µMAX® packages, respectively.
Applications
● Low-Voltage Battery Applications
● Portable Electronics
● Mechanical Potentiometer Replacement
●Offset and Gain Control
● Adjustable Voltage References/Linear Regulators
Features
● Dual, 256-Tap, Linear Taper Positions
● Single +2.6V to +5.5V Supply Operation
● Low (< 1μA) Quiescent Supply Current
● 10kΩ, 50kΩ, 100kΩ End-to-End Resistance Values
● SPI-Compatible Interface
● Power-On Sets Wiper to Midscale
● -40°C to +125°C Operating Temperature Range
Functional Diagrams appear at end of data sheet.
19-4599; Rev 3; 9/14
μMAX is a registered trademark of Maxim Integrated Products, Inc.
Note: All devices are specified over the -40°C to +125°C
operating temperature range.
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
PART PIN-
PACKAGE
END-TO-END
RESISTANCE (kΩ)
MAX5386LATE+ 16 TQFN-EP* 10
MAX5386MATE+ 16 TQFN-EP* 50
MAX5386NATE+ 16 TQFN-EP* 100
MAX5388LAUB+ 10 µMAX 10
MAX5388MAUB+ 10 µMAX 50
MAX5388NAUB+ 10 µMAX 100
15
16
14
13
5
6
7
LB
I.C.
8
HB
SCLK
DIN
VDD
1 3
HA
4
12 10 9
WA
LA
CS
N.C.
N.C.
GND
*EP
*EP = EXPOSED PAD.
MAX5386
WB N.C.
2
11
N.C.
TQFN
+
TOP VIEW
1
2
3
4
5
10
9
8
7
6
LA
WA
VDD
SCLKWB
HB
LB
GND
MAX5388
µMAX
+
TOP VIEW
DINCS
MAX5386/MAX5388 Dual, 256-Tap, Volatile, Low-Voltage
Linear Taper Digital Potentiometers
Pin Congurations
Ordering Information
EVALUATION KIT AVAILABLE
VDD to GND..............................................................-0.3V to +6V
H_, W_, L_ to GND.....-0.3V to the lower of (VDD + 0.3V) and +6V
All Other Pins to GND..............................................-0.3V to +6V
Continuous Current in to H_, W_, and L_
MAX5386L/MAX5388L................................................... ±5mA
MAX5386M/MAX5388M..................................................±2mA
MAX5386N/MAX5388N...................................................±1mA
Continuous Power Dissipation (TA = +70°C)
16 TQFN (derate 14.7mW/°C above+70°C)............1176.5mW
10 µMAX (derate 8.8mW/°C above+70°C)...............707.3mW
Operating Temperature Range...........................-40°C to +125°C
Junction Temperature.......................................................+150°C
Storage Temperature Range..............................-65°C to +150°C
Lead Temperature (soldering, 10s)...................................+300°C
(VDD = +2.6V to +5.5V, VH_ = VDD, VL_ = GND, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VDD = +5V,
TA = +25˚C. ) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Resolution N 256 Tap
DC PERFORMANCE (VOLTAGE-DIVIDER MODE)
Integral Nonlinearity INL (Note 2) -0.5 +0.5 LSB
Differential Nonlinearity DNL (Note 2) -0.5 +0.5 LSB
Dual Code Matching Register A = register B -0.5 +0.5 LSB
Ratiometric Resistor Tempco (∆VW/VW)/∆T no load ±5 ppm/°C
Full-Scale Error Code = FFH
MAX5386L/MAX5388L -3.0 -2.5
LSBMAX5386M/MAX5388M -1.0 -0.5
MAX5386N/MAX5388N -0.5 -0.25
Zero-Scale Error Code = 00H
MAX5386L/MAX5388L 2.5 3.0
LSBMAX5386M/MAX5388M +0.5 +1.0
MAX5386N/MAX5388N +0.25 +0.5
DC PERFORMANCE (VARIABLE-RESISTOR MODE) (Note 3)
Integral Nonlinearity R-INL
VDD > +2.6V
MAX5386L/MAX5388L ±1.0 ±2.5
LSB
MAX5386M/MAX5388M ±0.5 ±1.0
MAX5386N/MAX5388N ±0.25 ±0.8
VDD > +4.75V
MAX5386L/MAX5388L ±0.4 ±1.5
MAX5386M/MAX5388M ±0.3 ±0.75
MAX5386N/MAX5388N ±0.25 ±0.5
Differential Nonlinearity R-DNL VDD ≥ 2.6V -0.5 +0.5 LSB
DC PERFORMANCE (RESISTOR CHARACTERISTICS)
Wiper Resistance (Note 4) RWVDD ≥ 2.6V 250 600 Ω
VDD > 4.75V 150 200
Terminal Capacitance CH_, CL_Measured to GND 10 pF
Wiper Capacitance CW_Measured to GND 50 pF
End-to-End Resistor Tempco TCRNo load 35 ppm/°C
End-to-End Resistor Tolerance ∆RHL Wiper not connected -25 +25 %
AC PERFORMANCE
Crosstalk (Note 5) -90 dB
-3dB Bandwidth BW
Code = 80H,
10pF load,
VDD = +2.6V
MAX5386L/MAX5388L 600
kHzMAX5386M/MAX5388M 150
MAX5386N/MAX5388N 75
MAX5386/MAX5388 Dual, 256-Tap, Volatile, Low-Voltage
Linear Taper Digital Potentiometers
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Absolute Maximum Ratings
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.
Electrical Characteristics
(VDD = +2.6V to +5.5V, VH_ = VDD, VL_ = GND, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VDD = +5V,
TA = +25˚C. ) (Note 1)
Note 1: All devices are 100% production tested at TA = +25°C. Specifications over temperature limits are guaranteed by design and
characterization.
Note 2: DNL and INL are measured with the potentiometer configured as a voltage-divider (Figure 1) with H = VDD and L = GND.
The wiper terminal is unloaded and measured with an ideal voltmeter.
Note 3: R-DNL and R-INL are measured with the potentiometer configured as a variable resistor (Figure 1). DNL and INL are mea-
sured with the potentiometer configured as a variable resistor. H_ is unconnected and L_ = GND. For VDD = +5V, the wiper
terminal is driven with a source current of 400μA for the 10kΩ configuration, 80μA for the 50kΩ configuration, and 40μA for
the 100kΩ configuration. For VDD = +2.6V, the wiper terminal is driven with a source current of 200μA for the 10kΩ configu-
ration, 40μA for the 50kΩ configuration, and 20μA for the 100kΩ configuration.
Note 4: The wiper resistance is the worst value measured by injecting the currents given in Note 3 in to W with L = GND. RW =
(VW- VH)/IW.
Note 5: Drive HA with a 1kHz GND to VDD amplitude tone. LA = LB = GND. No load. WB is at midscale with a 10pF load. Measure
WB.
Note 6: The wiper-settling time is the worst case 0 to 50% rise time, measured between tap 0 and tap 127. H = VDD, L = GND, and
the wiper terminal is loaded with 10pF capacitance to ground.
Note 7: Digital timing is guaranteed by design and characterization, not production tested.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Total Harmonic Distortion
Plus Noise THD+N Measured at W, VH_ = 1VRMS at 1kHz 0.015 %
Wiper Settling Time (Note 6) tS
MAX5386L/MAX5388L 300
nsMAX5386M/MAX5388M 1000
MAX5386N/MAX5388N 2000
POWER SUPPLIES
Supply Voltage Range VDD 2.6 5.5 V
Standby Current Digital inputs = VDD or GND 1 µA
DIGITAL INPUTS
Minimum Input High Voltage VIH 70 %VDD
Maximum Input Low Voltage VIL 30 %VDD
Input Leakage Current -1 +1 µA
Input Capacitance 5pF
TIMING CHARACTERISTICS (Note 7)
Maximum SCLK Frequency fMAX 10 MHz
SCLK Clock Period tCP 100 ns
SCLK Pulse-Width High tCH 40 ns
SCLK Pulse-Width Low tCL 40 ns
CS Fall to SCLK Rise Setup Time tCSS 40 ns
SCLK Rise to CS Rise Hold Time tCSH 0 ns
DIN Setup Time tDS 40 ns
DIN Hold Time tDH 0 ns
SCLK Rise to CS Fall Delay tCS0 10 ns
SCLK Rise to SCLK Rise Hold
Time tCS1 40 ns
CS Pulse-Width High tCSW 100 ns
MAX5386/MAX5388 Dual, 256-Tap, Volatile, Low-Voltage
Linear Taper Digital Potentiometers
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Electrical Characteristics (continued)
(VDD = 5V, TA = +25°C, unless otherwise noted.)
SUPPLY CURRENT
vs. DIGITAL INPUT VOLTAGE
DIGITAL INPUT VOLTAGE (V)
SUPPLY CURRENT (mA)
0.5 3.0 5.04.54.01.5 2.52.01.0 3.5
0.01
1
0.001
0.1
10
0.0001
0
MAX5386 toc02
VDD = 2.6V
VDD = 5V
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
VDD (V)
IDD (µA)
5.53.53.0 4.0 4.5 5.0
0.25
0.75
0.50
1.00
0
2.5
MAX5386 toc03
RESISTANCE (W TO L)
vs. TAP POSITION (10kΩ)
TAP POSITION
W-TO-L RESISTANCE (kΩ)
25520415351 102
3000
9000
6000
11,000
0
4000
10,000
7000
2000
8000
5000
1000
0
MAX5386 toc04
RESISTANCE (W TO L)
vs. TAP POSITION (50kΩ)
TAP POSITION
W-TO-L RESISTANCE (kΩ)
25520415351 102
15,000
45,000
30,000
55,000
0
20,000
50,000
35,000
10,000
40,000
25,000
5000
0
MAX5386 toc05
RESISTANCE (W-TO-L)
vs. TAP POSITION (100kΩ)
MAX5386 toc06
TAP POSITION
RESISTANCE (W-TO-L) (kΩ)
20415310251
10k
20k
30k
40k
50k
60k
70k
80k
90k
100k
110k
0
0 255
WIPER RESISTANCE
vs. WIPER VOLTAGE (10kΩ)
WIPER VOLTAGE
WIPER RESISTANCE (Ω)
0.5 3.0 5.04.54.01.5 2.52.01.0 3.5
110
150
90
130
190
170
210
70
0
MAX5386 toc07
VDD = 2.6V
VDD = 5V
SUPPLY CURRENT
vs. TEMPERATURE
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
-25 -10 0 20 12535 50 65 80 95 110
0.4
0.8
0.2
0.6
1.0
0
-40
MAX5386 toc01
VDD = 2.6V
VDD = 5V
END-TO-END RESISTANCE % CHANGE
vs. TEMPERATURE
MAX5386 toc08
TEMPERATURE (°C)
END-TO-END RESISTANCE % CHANGE
1109580655035205-10-25
-0.4
-0.3
-0.2
-0.1
0
0.1
-0.5
-40 125
10kΩ
50kΩ
100kΩ
VARIABLE-RESISTOR DNL
vs. TAP POSITION (10kΩ)
MAX5386 toc09
TAP POSITION
DNL (LSB)
20415310251
-0.08
-0.06
-0.04
-0.02
0
0.02
0.04
0.06
0.08
0.10
-0.10
0 255
IWIPER = 400µA
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MAX5386/MAX5388 Dual, 256-Tap, Volatile, Low-Voltage
Linear Taper Digital Potentiometers
Typical Operating Characteristics
(VDD = 5V, TA = +25°C, unless otherwise noted.)
VARIABLE-RESISTOR DNL
vs. TAP POSITION (50kΩ)
MAX5386 toc10
TAP POSITION
DNL (LSB)
20415310251
-0.08
-0.06
-0.04
-0.02
0
0.02
0.04
0.06
0.08
0.10
-0.10
0 255
IWIPER = 80µA
VARIABLE-RESISTOR DNL
vs. TAP POSITION (100kΩ)
MAX5386 toc11
TAP POSITION
DNL (LSB)
20415310251
-0.08
-0.06
-0.04
-0.02
0
0.02
0.04
0.06
0.08
0.10
-0.10
0 255
IWIPER = 400µA
VARIABLE-RESISTOR INL
vs. TAP POSITION (10kΩ)
MAX5386 toc12
TAP POSITION
INL (LSB)
20415310251
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1.0
-1.0
0 255
IWIPER = 400µA
VARIABLE-RESISTOR INL
vs. TAP POSITION (50kΩ)
MAX5386 toc13
TAP POSITION
INL (LSB)
20415310251
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
-0.5
0 255
IWIPER = 80µA
VARIABLE-RESISTOR INL
vs. TAP POSITION (100kΩ)
MAX5386 toc14
TAP POSITION
INL (LSB)
20415310251
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
-0.5
0 255
IWIPER = 400µA
VOLTAGE-DIVIDER DNL
vs. TAP POSITION (10kΩ)
MAX5386 toc15
TAP POSITION
DNL (LSB)
20415310251
-0.08
-0.06
-0.04
-0.02
0
0.02
0.04
0.06
0.08
0.10
-0.10
0 255
VOLTAGE-DIVIDER DNL
vs. TAP POSITION (50kΩ)
MAX5386 toc16
TAP POSITION
DNL (LSB)
20415310251
-0.08
-0.06
-0.04
-0.02
0
0.02
0.04
0.06
0.08
0.10
-0.10
0 255
VOLTAGE-DIVIDER DNL
vs. TAP POSITION (100kΩ)
MAX5386 toc17
TAP POSITION
DNL (LSB)
20415310251
-0.08
-0.06
-0.04
-0.02
0
0.02
0.04
0.06
0.08
0.10
-0.10
0 255
VOLTAGE-DIVIDER INL
vs. TAP POSITION (10kΩ)
MAX5386 toc18
TAP POSITION
INL (LSB)
20415310251
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
-0.5
0 255
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MAX5386/MAX5388 Dual, 256-Tap, Volatile, Low-Voltage
Linear Taper Digital Potentiometers
Typical Operating Characteristics (continued)
(VDD = 5V, TA = +25°C, unless otherwise noted.)
VOLTAGE-DIVIDER INL
vs. TAP POSITION (100kΩ)
MAX5386 toc20
TAP POSITION
INL (LSB)
20415310251
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
-0.5
0 255
TAP-TO-TAP SWITCHING TRANSIENT
(CODE 127 TO 128) (MAX5386L)
200ns/div
CS
5V/div
VW-L
20mV/div
MAX5386 toc21
TAP-TO-TAP SWITCHING TRANSIENT
(CODE 128 TO 128) (MAX5386M)
400ns/div
CS
5V/div
VW-L
20mV/div
MAX5386 toc22
TAP-TO-TAP SWITCHING TRANSIENT
(CODE 127 TO 128) (MAX5386N)
1µs/div
CS
5V/div
VW-L
20mV/div
MAX5386 toc23
MAX5386 POWER-ON WIPER TRANSIENT
CODE 0 TO 128
2µs/div
VDD
2V/div
OUTPUT W
2V/div
MAX5386 toc24
MIDSCALE FREQUENCY RESPONSE
MAX5386 toc25
FREQUENCY (kHz)
GAIN (dB)
1,0001001010.1
-20
-10
0
10
-30
0.01 10,000
VIN = 1VP-P
CW = 10pF
MAX5386L
MAX5386M
MAX5386N
VOLTAGE-DIVIDER INL
vs. TAP POSITION (50kΩ)
MAX5386 toc19
TAP POSITION
INL (LSB)
20415310251
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
-0.5
0 255
CROSSTALK vs. FREQUENCY
MAX5386 toc26
FREQUENCY (kHz)
CROSSTALK (dB)
1001010.1
-120
-100
-80
-60
-40
-20
0
-140
0.01 1000
MAX5386L
MAX5386M
MAX5386N
THD+N vs. FREQUENCY
MAX5386 toc27
FREQUENCY (kHz)
THD+N (%)
1010.10
0.02
0.04
0.06
0.08
0.10
0.12
0.14
0
0.01 100
MAX5386L
MAX5386M
MAX5386N
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MAX5386/MAX5388 Dual, 256-Tap, Volatile, Low-Voltage
Linear Taper Digital Potentiometers
Typical Operating Characteristics (continued)
Figure 1. Voltage-Divider/Variable-Resistor Configurations
PIN NAME FUNCTION
MAX5386 MAX5388
1 3 HB Resistor B High Terminal. The voltage at HB can be higher or lower than the voltage at
LB. Current can ow in to or out of HB.
2 4 WB Resistor B Wiper Terminal
3 2 LB Resistor B Low Terminal. The voltage at LB can be higher or lower than the voltage at
HB. Current can ow in to or out of LB.
4 — I.C. Internally Connected. Connect to GND.
5 1 GND Ground. Both pins must be grounded.
6, 7, 11, 13 — N.C. No Connection. Not internally connected.
8 5 CS Active-Low Chip-Select Input
9 6 DIN Serial-Interface Data Input
10 7 SCLK Serial-Interface Clock Input
12 8 VDD Power-Supply Input. Bypass VDD to GND with a 0.1µF capacitor close to the device.
14 — HA Resistor A High Terminal. The voltage at HA can be higher or lower than the voltage at
LA. Current can ow in to or out of HA.
15 9 WA Resistor A Wiper Terminal
16 10 LA Resistor A Low Terminal. The voltage at LA can be higher or lower than the voltage at
HA. Current can ow in to or out of LA.
— — EP Exposed Pad (TQFN Only). Internally connected to GND. Connect to ground.
H
L
W
VOLTAGE-DIVIDER
CONFIGURATION
VARIABLE-RESISTOR
CONFIGURATION
N.C.
L
W
MAX5386/MAX5388 Dual, 256-Tap, Volatile, Low-Voltage
Linear Taper Digital Potentiometers
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Pin Description
Detailed Description
The MAX5386/MAX5388 dual, 256-tap, volatile low-
voltage linear taper digital potentiometers offer three end-
toend resistance values of 10kΩ, 50kΩ, and 100kΩ. Each
potentiometer consists of 255 fixed resistors in series
between terminals H and L. The potentiometer wiper, W,
is programmable to access anyone of the 256 tap points
on the resistor string.
The potentiometers in each device are programmable
independently of each other. The MAX5386/MAX5388
have an SPI interface.
SPI Digital Interface
The MAX5386/MAX5388 include an SPI interface, which
provides a 3-wire write-only serial data interface to control
the wiper tap position through inputs chip select (CS),
data in (DIN), and data clock (SCLK). Drive CS low to load
data from DIN synchronously into the serial shift register
on the rising edge of each SCLK pulse. The MAX5386/
MAX5388 load the last 9 bits of clocked data once CS
transitions high. See Figures 2 and 3. After all the data
bits are shifted in, data are latched into the appropriate
potentiometer control register when CS goes from low
to high. Data written to a memory register immediately
updates the wiper position. Keep CS low during the entire
data stream to prevent the data from being terminated.
The first bit A0 (address bit) addresses one of the two
potentiometers; writing a zero in A0 addresses control
register A and writing a one in A0 addresses control reg-
ister B. See Table 1. The power-on reset (POR) circuitry
sets the wiper to midscale (D[7:0] 1000 0000).
The 8 data bits (D7–D0) indicate the position of the wiper.
For D[7:0] = 0000 0000, the wiper moves to the position
closest to L. For D[7:0] = 1111 1111, the wiper moves clos-
est to H. D[7:0] is 1000 0000 following poweron for both
registers A and B.
Register A: The data byte writes to register A, and the
wiper of potentiometer A moves to the appropriate posi-
tion at the rising edge of CS. D[7:0] indicates the position
of the wiper. D[7:0] = 0000 0000 moves the wiper to the
position closest to L. D[7:0] = 1111 1111 moves the wiper
to the position closest to H. D[7:0] is 1000 0000 following
power-on.
Register B: The data byte writes to register B, and the
wiper of potentiometer B moves to the appropriate posi-
tion at the rising edge of CS. D[7:0] indicates the position
of the wiper. D[7:0] = 0000 0000 moves the wiper to the
position closest to L. D[7:0] = 1111 1111 moves the wiper
to the position closest to H. D[7:0] is 1000 0000 following
power-on.
Table 1. SPI Register Map
Bit Number 1 2 3 4 5 6 7 8 9
Bit Name A0 D7 D6 D5 D4 D3 D2 D1 D0
Write Wiper Register A 0 D7 D6 D5 D4 D3 D2 D1 D0
Write Wiper Register B 1 D7 D6 D5 D4 D3 D2 D1 D0
MAX5386/MAX5388 Dual, 256-Tap, Volatile, Low-Voltage
Linear Taper Digital Potentiometers
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Figure 2. SPI Digital Interface Format
Figure 3. SPI Timing Diagram
CS
COMMAND
STARTED 9 BITS
SCLK
DIN A0 D7 D6 D5 D4 D3 D2 D0
D1
WIPER REGISTER
LOADED
SCLK
CS
DIN
tCSO tCSS tCL
tDS
tDH
tCH
tCSW
tCS1
tCSH
tCP
MAX5386/MAX5388 Dual, 256-Tap, Volatile, Low-Voltage
Linear Taper Digital Potentiometers
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Applications Information
Variable-Gain Amplier
Figure 4 shows a potentiometer adjusting the gain of a
noninverting amplifier. Figure 5 shows a potentiometer
adjusting the gain of an inverting amplifier.
Adjustable Dual Linear Regulator
Figure 6 shows an adjustable dual linear regulator using a
dual potentiometer as two variable resistors.
Adjustable Voltage Reference
Figure 7 shows an adjustable voltage reference circuit
using a potentiometer as a voltage-divider.
Figure 4. Variable-Gain Noninverting Amplifier
Figure 5. Variable-Gain Inverting Amplifier
Figure 6. Adjustable Dual Linear Regulator
Figure 7. Adjustable Voltage Reference
VIN
VOUT
H
L
W
VIN
VOUT
HL
W
VOUT1
VOUT2
OUT1
OUT2
SET1
SET2
IN
V+
L
L
H
H
W
W
MAX8866
OUT
IN
+5V
VREF
GND L
H
W
MAX6160
MAX5386/MAX5388 Dual, 256-Tap, Volatile, Low-Voltage
Linear Taper Digital Potentiometers
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Variable Gain Current to Voltage Converter
Figure 8 shows a variable gain current-to-voltage con-
verter using a potentiometer as a variable resistor.
LCD Bias Control
Figure 9 shows a positive LCD bias control circuit using a
potentiometer as a voltage-divider.
Programmable Filter
Figure 10 shows a programmable filter using a dual
potentiometer.
Offset Voltage Adjustment Circuit
Figure 11 shows an offset voltage adjustment circuit using
a dual potentiometer.
Figure 8. Variable Gain I-to-V Converter
Figure 9. Positive LCD Bias Control Using a Voltage-Divider
Figure 10. Programmable Filter
Figure 11. Offset Voltage Adjustment Circuit
L
R1 R2
R3
VOUT
IS
H
W
VOUT = IS x ((R3 x (1 + R2/R1)) + R2)
L
VOUT
H
W
+30V
+5V
VOUT
VIN
LA
HA
WB
LB
HB
R2
R1
R3
WA
VOUT
LB
HB
WB
WA
LA
HA
+5V
MAX5386/MAX5388 Dual, 256-Tap, Volatile, Low-Voltage
Linear Taper Digital Potentiometers
www.maximintegrated.com Maxim Integrated
│
11
PACKAGE
TYPE
PACKAGE
CODE
DOCUMENT
NO.
LAND
PATTERN
NO.
10 µMAX U10+2 21-0061 90-0330
16 TQFN-EP T1633+5 21-0136 90-0332
256
DECODER
LATCH
LATCH
POR SPI
GND
DIN
SCLK
VDD
WALA
HB
WB
LB
CS
MAX5386
HA
256
DECODER
256
DECODER
LATCH
LATCH
POR SPI
GND
DIN
SCLK
VDD
WALA
HB
WB
LB
CS
MAX5388
256
DECODER
MAX5386/MAX5388 Dual, 256-Tap, Volatile, Low-Voltage
Linear Taper Digital Potentiometers
www.maximintegrated.com Maxim Integrated
│
12
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.
Chip Information
PROCESS: BiCMOS
Functional Diagrams
REVISION
NUMBER
REVISION
DATE DESCRIPTION PAGES
CHANGED
0 4/09 Initial release —
1 11/09
Released MAX5386LATE+ and MAX5386NATE+ in Ordering Information;
corrected specications for Full-Scale Error, Zero-Scale Error, and Integral
Nonlinearity in Electrical Characteristics; added I.C. row to Pin Description;
corrected Figure 1
1, 2, 7
2 1/10 Released the MAX5388LAUB+, MAX5388MAUB+, MAX5388NAUB+ + in
Ordering Information.1
3 9/14 Removed automotive reference from data sheet 1
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 specications 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. © 2014 Maxim Integrated Products, Inc.
│
13
MAX5386/MAX5388 Dual, 256-Tap, Volatile, Low-Voltage
Linear Taper Digital Potentiometers
Revision History
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.
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MAX5386LATE+ MAX5386LATE+T MAX5386MATE+ MAX5386MATE+T MAX5386NATE+ MAX5386NATE+T
MAX5388NAUB+ MAX5388LAUB+ MAX5388LAUB+T MAX5388MAUB+ MAX5388MAUB+T MAX5388NAUB+T