AD5161S

Part: AD5161BRMZ50 — Analog Devices (AD5161, 50 kΩ version)

Type: 256-Position SPI/I²C Selectable Digital Potentiometer

Description: 256-position digital potentiometer with 5 kΩ/10 kΩ/50 kΩ/100 kΩ end-to-end resistance options, pin-selectable SPI/I²C interface, 2.7–5.5 V single supply and 8 μA max supply current in a MSOP-10 package.

Operating Conditions:

• Supply voltage: 2.7–5.5 V
• Operating temperature: -40 to +125 °C
• Resistor terminal voltage range (A, B, W): GND to VDD
• Max SPI clock: 25 MHz; max I²C SCL: 400 kHz

Absolute Maximum Ratings:

• VDD to GND: -0.3 V to +7 V
• VA, VB, VW to GND: VDD
• Max terminal current (IMAX): ±20 mA
• Digital inputs and output voltage to GND: 0 V to +7 V
• Max junction temperature: 150 °C
• Storage temperature: -65 to +150 °C
• Lead temperature (soldering, 10 s): 300 °C

Key Specs:

• Resolution: 8 bits (256 positions)
• Nominal resistor tolerance: ±30 % max (TA = 25 °C)
• Resistance temperature coefficient: 45 ppm/°C typ
• Wiper resistance: 50 Ω typ, 120 Ω max
• 10/50/100 kΩ versions: INL ±1 LSB max, DNL ±1 LSB max (potentiometer mode); R-INL ±2 LSB max, R-DNL ±1 LSB max (rheostat mode)
• Supply current: 3 μA typ, 8 μA max (VIH = 5 V or VIL = 0 V); shutdown current 0.01 μA typ, 1 μA max (VDD = 5.5 V)
• Bandwidth -3 dB (RAB = 10/50/100 kΩ, code 0x80): 600/100/40 kHz typ
• Resistor noise density: 9 nV/√Hz typ (RWB = 5 kΩ)
• Voltage divider temperature coefficient: 15 ppm/°C typ (code 0x80)

Features:

• 256 positions
• End-to-end resistance options of 5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ
• Pin-selectable SPI/I²C compatible interface
• Extra package address decode pin AD0 (up to two devices on an I²C bus)
• Full read/write of wiper register
• Power-on preset to midscale
• SDO output allows daisy-chaining of multiple devices in SPI mode
• I²C command bits for midscale reset and shutdown
• Evaluation board available

Applications:

• Mechanical potentiometer replacement in new designs
• Transducer adjustment of pressure, temperature, position, chemical and optical sensors
• RF amplifier biasing
• Gain control and offset adjustment

Package:

• 10-lead MSOP (3 mm × 4.9 mm), θJA 200 °C/W

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 2 C 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

Mechanical potentiometer replacement in new designs Transducer adjustment of pressure, temperature, position, chemical, and optical sensors RF amplifier biasing Gain control and offset adjustment

VDD = 5 V ± 10%, or 3 V ± 10%; VA = +VDD; VB = 0 V; -40°C < TA < +125°C; unless otherwise noted.