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AD5124

更新时间： 2024-11-23 12:23:55
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描述
The AD5124/AD5144/AD5144A 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.

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AD5124 数据手册

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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  
Document Feedback  
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.  
Trademarks and registeredtrademarks arethe property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
Technical Support  
©2012 Analog Devices, Inc. All rights reserved.  
www.analog.com  
 
 
 
 
 
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