Features: 256-position
End-to-end resistance 5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ
Compact MSOP-10 (3 mm * 4.9 mm) package
Pin selectable SPI/I
2C compatible interface
Extra package address decode pin AD0
Full read/write of wiper register
Power-on preset to midscale
Single supply 2.7 V to 5.5 V
Low temperature coefficient 45 ppm/°C
Low power, IDD = 8 µA
Wide operating temperature 40°C to +125°C
SDO output allows multiple device daisy-chaining
Evaluation board available ApplicationMechanical potentiometer replacement in new designs
Transducer adjustment of pressure, temperature, position, chemical, and optical sensors
RF amplifier biasing
Automotive electronics adjustment
Gain control and offset adjustment Pinout
Specifications
| # Channels |
1 |
| # Positions |
256 |
| Memory Type |
Volatile |
| Interface |
I2C,SPI |
| Resistor Values (kOhms) |
5, 10, 50, 100 |
| Voltage Range (V) |
+5.5V |
| Supply Current |
3A |
| Temp. Range -40 °C to.. |
125Deg |
| Absolute Tempco (ppm/°C) |
35ppm/C |
| Package |
MSOP |
VDD to GND 0.3 V to +7 V
VA, VB, VW to GND VDD
IMAX1 ±20 mA
Digital Inputs and Output Voltage to GND 0 V to +7 V
Operating Temperature Range 40°C to +125°C
Maximum Junction Temperature (TJMAX)150°C
Storage Temperature65°C to +150°C
Lead Temperature (Soldering, 10 sec)300°C
Thermal Resistance2JA: MSOP-10200°C/W DescriptionThe AD5161 provides a compact 3 mm × 4.9 mm packaged solution for 256-position adjustment applications. These devices perform the same electronic adjustment function as mechanical potentiometers or variable resistors, with enhanced resolution, solid-state reliability, and superior low temperature coefficient performance. The wiper settings are controllable through a pin selectable SPI or I
2C compatible digital interface, which can also be used to read back the wiper register content. When the SPI mode is used, the device can be daisy-chained (SDO to SDI), allowing several parts to share the same control lines. In the I
2C mode,address pin AD0 can be used to place up to two devices on the same bus. In this same mode, command bits are available to
reset the wiper position to midscale or to shut down the device into a state of zero power consumption.Operating from a 2.7 V to 5.5 V power supply and consuming less than 5 µA allows for usage in portable battery-operated applications.
AD5161 Data Sheet
