MAX5389 MAXIM [Maxim Integrated Products], MAX5389 Datasheet

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MAX5389

Manufacturer Part Number
MAX5389
Description
Dual, 256-Tap, Volatile, Low-Voltage Linear Taper Digital Potentiometer
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet

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19-5141; Rev 1; 4/10
The MAX5389 dual, 256-tap, volatile, low-voltage lin-
ear taper digital potentiometer offers three end-to-end
resistance values of 10kI, 50kI, and 100kI. Operating
from a single +2.6V to +5.5V power supply, the device
provides a low 35ppm/NC end-to-end temperature coef-
ficient. The MAX5389 features an up/down interface.
The small package size, low supply operating voltage,
low supply current, and automotive temperature range
of the MAX5389 make the device uniquely suited for the
portable consumer market, battery backup industrial
applications, and the automotive market.
The MAX5389 is specified over the automotive -40NC to
+125NC temperature range and is available in a 14-pin
TSSOP package.
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Audio Mixing
Mechanical Potentiometer Replacement
Low-Drift Programmable Filters and Amplifiers
Adjustable Voltage References/Linear Regulators
Programmable Delays and Time Constants
Automotive Electronics
Low-Voltage Battery Applications
_______________________________________________________________ Maxim Integrated Products 1
General Description
Dual, 256-Tap, Volatile, Low-Voltage
Linear Taper Digital Potentiometer
Applications
S
S
S
S
S
S
S
Note: All devices are specified over the -40NC to +125NC oper-
ating temperature range
+Denotes a lead(Pb)-free/RoHS-compliant package.
MAX5389LAUD+
MAX5389MAUD+
MAX5389NAUD+
Dual, 256-Tap Linear Taper Positions
Single +2.6V to +5.5V Supply Operation
Low (< 1µA) Quiescent Supply Current
10kI, 50kI, 100kI End-to-End Resistance Values
Up/Down Interface
Power-On Sets Wiper to Midscale
-40°C to +125NC Operating Temperature Range
INCA
INCB
CSA
UDA
CSB
UDB
PART
V
U/D
DD
MAX5389
PIN-PACKAGE
LATCH
LATCH
POR
Ordering Information
14 TSSOP
14 TSSOP
14 TSSOP
Functional Diagram
GND
HA
256 DECODER
256 DECODER
WA
RESISTANCE (kI)
END-TO-END
LA
Features
100
10
50
HB
WB
LB

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MAX5389 Summary of contents

Page 1

... The MAX5389 features an up/down interface. The small package size, low supply operating voltage, low supply current, and automotive temperature range of the MAX5389 make the device uniquely suited for the portable consumer market, battery backup industrial applications, and the automotive market. ...

Page 2

... H_, W_ GND ......................................-0.3V to the lower of All Other Pins to GND .............................................-0.3V to +6V Continuous Current into H_, W_, and L_ MAX5389L ......................................................................... Q5mA MAX5389M ........................................................................ Q2mA MAX5389N ........................................................................ Q1mA 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 ...

Page 3

... GND -40NC to +125NC, unless otherwise noted. Typical values are CONDITIONS (Note 5) MAX5389L Code = 80H, 10pF load, BW MAX5389M V = +2.6V DD MAX5389N Measured RMS MAX5389L t MAX5389M S MAX5389N V DD Digital inputs = V or GND MAX ...

Page 4

Dual, 256-Tap, Volatile, Low-Voltage Linear Taper Digital Potentiometer Figure 1. Voltage-Divider and Variable Resistor Configurations ( V = +5V +25°C, unless otherwise noted SUPPLY CURRENT vs. TEMPERATURE 1.0 0.9 0 0.7 0.6 ...

Page 5

Dual, 256-Tap, Volatile, Low-Voltage Linear Taper Digital Potentiometer ( V = +5V +25°C, unless otherwise noted WIPER RESISTANCE vs. WIPER VOLTAGE (10kI) 210 V = 2.6V 190 DD 170 150 130 DD 110 ...

Page 6

... TAP POSITION VOLTAGE-DIVIDER INL vs. TAP POSITION (100kI) 0.5 0.4 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 255 0 51 102 153 204 TAP POSITION VOLTAGE-DIVIDER INL vs. TAP POSITION (10kI) 0.5 0.4 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 255 0 51 102 153 204 TAP POSITION TAP-TO-TAP SWITCHING TRANSIENT (CODE 127 TO 128) 10kI MAX5389 toc21 400ns/div 255 255 V W-L 20mV/div INC 5V/div ...

Page 7

... Dual, 256-Tap, Volatile, Low-Voltage Linear Taper Digital Potentiometer ( V = +5V +25°C, unless otherwise noted TAP-TO-TAP SWITCHING TRANSIENT (CODE 127 TO 128) 50kI MAX5389 toc22 V W-L 20mV/div INC 5V/div 400ns/div MIDSCALE FREQUENCY RESPONSE P 10pF W 0 MAX5389L -10 MAX5389M -20 MAX5389N -30 0.01 0 100 ...

Page 8

... Active-Low Register B Chip-Select Input. Drive CSB low to change wiper position WA through INCB and UDB. 8 ______________________________________________________________________________________ TOP VIEW + CSA 1 14 CSB UDA 2 13 INCA UDB 3 12 INCB GND DD MAX5389 FUNCTION to GND with a 0.1FF capacitor close to the device. DD Pin Configuration Pin Description ...

Page 9

... On power-up, the wiper position is set to midscale (tap 128). The potentiometers are programmable independent of each other. The MAX5389 features an up/down interface. Up/Down Interface Logic inputs CS_, UD_, and INC_ determine the wiper position of the device (Table 1). With CS_ low and UD_ ...

Page 10

Dual, 256-Tap, Volatile, Low-Voltage Linear Taper Digital Potentiometer Applications Information Variable Gain Amplifier Figure 3 shows a potentiometer adjusting the gain of a noninverting amplifier. Figure 4 shows a potentiometer adjusting the gain of an inverting amplifier ...

Page 11

Dual, 256-Tap, Volatile, Low-Voltage Linear Taper Digital Potentiometer Variable Gain Current to Voltage Converter Figure 7 shows a variable gain current to voltage con- verter using a potentiometer as a variable resistor. LCD Bias Control Figure 8 shows a positive ...

Page 12

Dual, 256-Tap, Volatile, Low-Voltage Linear Taper Digital Potentiometer + Figure 11. Offset Voltage Adjustment Circuit 12 _____________________________________________________________________________________ PROCESS: BiCMOS WA LA For the latest package outline information and land pat- V OUT terns www.maxim-ic.com/packages. ...

Page 13

Dual, 256-Tap, Volatile, Low-Voltage Linear Taper Digital Potentiometer REVISION REVISION NUMBER DATE 0 1/10 Initial release Added Soldering Temperature in Absolute Maximum Ratings; corrected 1 4/10 code in Conditions of -3dB Bandwidth specification in Electrical Characteristics; corrected Table 1 and ...

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