AD5112BCPZ80-500R7

Overview

The AD5112BCPZ80-500R7 is a single-channel, nonvolatile digital potentiometer featuring 64 tap positions and an I²C-compatible interface. It offers a nominal resistance of 80 kΩ with ±8% tolerance and a temperature coefficient of 35 ppm/°C. The device operates on a 2.3 V to 5.5 V analog supply and supports logic levels from 1.8 V to VDD. Key specifications include a maximum wiper current of ±1.5 mA, low power consumption (2.5 µA max at 2.7 V), and EEPROM storage for data retention up to 50 years. It is housed in a compact 8-lead LFCSP package.

Feature Summary

• Nonvolatile memory with 1 million write cycles and 50-year typical data retention
• I²C serial interface supporting standard (100 kHz) and fast (400 kHz) modes
• Low wiper resistance (typical 45 Ω) and wide bandwidth (200 kHz at 80 kΩ)
• Extended industrial operating temperature range from −40°C to +125°C

Applications

• Mechanical potentiometer replacement
• Portable electronics level adjustment
• Audio volume control
• Low resolution DAC
• LCD panel brightness and contrast control

Procurement Notes

Verify the specific suffix '500R7' against official Analog Devices documentation to confirm packaging details such as reel size or tape width. Ensure compatibility with existing PCB footprints for the 8-lead LFCSP package. Confirm that the I²C address configuration meets system requirements, as the datasheet indicates address options may vary.

Selection Notes

Select this component when a nonvolatile solution with 64 discrete resistance steps is required. The 80 kΩ value suits applications needing higher impedance than the 5 kΩ or 10 kΩ variants. Verify that the maximum continuous current of ±1.5 mA for the 80 kΩ version aligns with the circuit load. Ensure the I²C bus speed does not exceed 400 kHz if fast mode timing constraints are critical.

Part Context

This part belongs to the AD5110/AD5112/AD5114 family of single-channel digital potentiometers. The AD5112 specifically provides 64 positions, distinguishing it from the 128-position AD5110 and the 32-position AD5114. All models share similar electrical characteristics, including ±8% resistor tolerance and nonvolatile EEPROM storage, but differ in resolution and available resistance values.

Replacement Considerations

Direct substitutes within the same family include the AD5112BCPZ10-500R7 (10 kΩ) and AD5112BCPZ5-500R7 (5 kΩ) if resistance scaling is acceptable. For different resolutions, consider the AD5110 series for 128 positions or the AD5114 series for 32 positions, provided the interface and package remain compatible.

FAQ

What is the maximum continuous current for the 80 kΩ version?

The maximum continuous current for the 80 kΩ version is ±1.5 mA.

How long does the EEPROM restore take after power-up?

The power-on EEPROM refresh time is less than 50 μs.

Is the wiper resistance linear across the adjustment range?

Yes, the device features a linear taper with a nominal temperature coefficient of 35 ppm/°C.