Quad Channel, 128-/256-Position, I
2
C,
Nonvolatile Digital Potentiometer
Data Sheet
FEATURES
10 kΩ and 100 kΩ resistance options
Resistor tolerance: 8% maximum
Wiper current: ±6 mA
Low temperature coefficient: 35 ppm/°C
Wide bandwidth: 3 MHz
Fast start-up time < 75 μs
Linear gain setting mode
Single- and dual-supply operation
Wide operating temperature: −40°C to +125°C
3 mm × 3 mm package
4 kV ESD protection
V
DD
FUNCTIONAL BLOCK DIAGRAM
AD5123/AD5143
POWER-ON
RESET
RDAC1
INPUT
REGISTER 1
RDAC2
INPUT
REGISTER 2
SERIAL
INTERFACE
RDAC3
7/8
INPUT
REGISTER 3
RDAC4
A1
W1
B1
A2
W2
B2
SCL
SDA
ADDR
W3
B3
APPLICATIONS
Portable electronics level adjustment
LCD panel brightness and contrast controls
Programmable filters, delays, and time constants
Programmable power supplies
INPUT
REGISTER 4
EEPROM
MEMORY
W4
B4
GND
V
SS
Figure 1.
GENERAL DESCRIPTION
The
potentiometers provide a nonvolatile
solution for 128-/256-position adjustment applications, offering
guaranteed low resistor tolerance errors of ±8% and up to ±6 mA
current density in the Ax, Bx, and Wx pins.
The low resistor tolerance and low nominal temperature coefficient
simplify open-loop applications as well as applications requiring
tolerance matching.
The linear gain setting mode allows independent programming
of the resistance between the digital potentiometer terminals,
through the R
AW
and R
WB
string resistors, allowing very accurate
resistor matching.
The high bandwidth and low total harmonic distortion (THD)
ensure optimal performance for ac signals, making the devices
suitable for filter design.
The low wiper resistance of only 40 Ω at the ends of the resistor
array allows for pin-to-pin connection.
The wiper values can be set through an I
2
C-compatible digital
interface that is also used to read back the wiper register and
EEPROM contents.
The
are available in a compact, 16-lead, 3 mm ×
3 mm LFCSP. The parts are guaranteed to operate over the extended
industrial temperature range of −40°C to +125°C.
Table 1. Family Models
Model
1
Channel
Quad
Quad
Quad
Quad
Quad
Quad
Quad
Dual
Dual
Dual
Dual
Single
Single
Position
128
128
128
256
256
256
256
128
128
256
256
128
256
Interface
I
2
C
SPI/I
2
C
SPI
I
2
C
SPI/I
2
C
SPI
I
2
C
SPI
I
2
C
SPI
I
2
C
SPI/I
2
C
SPI/I
2
C
Package
LFCSP
LFCSP
TSSOP
LFCSP
LFCSP
TSSOP
TSSOP
LFCSP/TSSOP
LFCSP/TSSOP
LFCSP/TSSOP
LFCSP/TSSOP
LFCSP
LFCSP
Two potentiometers and two rheostats.
Rev. A
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2012–2013 Analog Devices, Inc. All rights reserved.
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
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10878-001
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