Quad Channel, 128-/256-Position, I2C/SPI,
Nonvolatile Digital Potentiometer
Data Sheet
AD5124/AD5144/AD5144A
FEATURES
FUNCTIONAL BLOCK DIAGRAM
V
V
DD
LOGIC
LRDAC
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
AD5124/AD5144
POWER-ON
RESET
RDAC1
A1
W1
B1
A2
W2
B2
A3
W3
B3
A4
W4
B4
INPUT
REGISTER 1
Fast start-up time < 75 μs
Linear gain setting mode
RESET
DIS
RDAC2
INPUT
REGISTER 2
Single- and dual-supply operation
Independent logic supply: 1.8 V to 5.5 V
Wide operating temperature: −40°C to +125°C
4 mm × 4 mm package option
4 kV ESD protection
SCLK/SCL
SDI/SDA
SERIAL
INTERFACE
RDAC3
7/8
INPUT
REGISTER 3
SYNC/ADDR0
SDO/ADDR1
RDAC4
INPUT
REGISTER 4
APPLICATIONS
EEPROM
MEMORY
Portable electronics level adjustment
LCD panel brightness and contrast controls
Programmable filters, delays, and time constants
Programmable power supplies
GND
V
SS
WP
Figure 1. AD5124/AD5144 24-Lead LFCSP
GENERAL DESCRIPTION
The AD5124/AD5144/AD5144A potentiometers provide a
nonvolatile solution for 128-/256-position adjustment applications,
offering guaranteed low resistor tolerance errors of 8ꢀ and up to
6 mA current density in the Ax, Bx, and Wx pins.
The AD5124/AD5144/AD5144A are available in a compact,
24-lead, 4 mm × 4 mm LFCSP and a 20-lead TSSOP. The parts
are guaranteed to operate over the extended industrial temperature
range of −40°C to +125°C.
The low resistor tolerance and low nominal temperature coefficient
simplify open-loop applications as well as applications requiring
tolerance matching.
Table 1. Family Models
Model
Channel Position Interface Package
AD51231
AD5124
AD5124
AD51431
AD5144
AD5144
Quad
Quad
Quad
Quad
Quad
Quad
128
128
128
256
256
256
256
128
128
256
256
128
256
I2C
LFCSP
LFCSP
TSSOP
LFCSP
LFCSP
TSSOP
TSSOP
LFCSP/TSSOP
LFCSP/TSSOP
LFCSP/TSSOP
LFCSP/TSSOP
LFCSP
SPI/I2C
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.
SPI
I2C
SPI/I2C
SPI
I2C
SPI
I2C
SPI
I2C
SPI/I2C
SPI/I2C
The high bandwidth and low total harmonic distortion (THD)
ensure optimal performance for ac signals, making these devices
suitable for filter design.
AD5144A Quad
AD5122 Dual
AD5122A Dual
AD5142 Dual
AD5142A Dual
The low wiper resistance of only 40 Ω at the ends of the resistor
array allow for pin-to-pin connection.
The wiper values can be set through an SPI-/I2C-compatible digital
interface that is also used to read back the wiper register and
EEPROM contents.
AD5121
AD5141
Single
Single
LFCSP
1 Two potentiometers and two rheostats.
Rev. A
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