AD5123 View Datasheet(PDF) - Analog Devices
Part Name
Description
Manufacturer
AD5123 Datasheet PDF : 28 Pages
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Data Sheet
Quad Channel, 128-/256-Position, I2C,
Nonvolatile Digital Potentiometer
AD5123/AD5143
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
APPLICATIONS
Portable electronics level adjustment
LCD panel brightness and contrast controls
Programmable filters, delays, and time constants
Programmable power supplies
GENERAL DESCRIPTION
The AD5123/AD5143 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 RAW and RWB 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 I2C-compatible digital
interface that is also used to read back the wiper register and
EEPROM contents.
The AD5123/AD5143 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.
SCL
SDA
ADDR
FUNCTIONAL BLOCK DIAGRAM
VDD
POWER-ON
RESET
SERIAL
INTERFACE 7/8
AD5123/AD5143
RDAC1
A1
INPUT
REGISTER 1
W1
B1
RDAC2
A2
INPUT
REGISTER 2
W2
B2
RDAC3
INPUT
REGISTER 3
W3
B3
RDAC4
INPUT
REGISTER 4
W4
B4
EEPROM
MEMORY
GND VSS
Figure 1.
Table 1. Family Models
Model Channel Position
AD51231 Quad
128
AD5124 Quad
128
AD5124 Quad
128
AD5143 Quad
256
AD5144 Quad
256
AD5144 Quad
256
AD5144A Quad
256
AD5122 Dual
128
AD5122A Dual
128
AD5142 Dual
256
AD5142A Dual
256
AD5121 Single 128
AD5141 Single 256
Interface
I2C
SPI/I2C
SPI
I2C
SPI/I2C
SPI
I2C
SPI
I2C
SPI
I2C
SPI/I2C
SPI/I2C
Package
LFCSP
LFCSP
TSSOP
LFCSP
LFCSP
TSSOP
TSSOP
LFCSP/TSSOP
LFCSP/TSSOP
LFCSP/TSSOP
LFCSP/TSSOP
LFCSP
LFCSP
1 Two potentiometers and two rheostats.
Rev. A
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