Analog Devices Inc. AD5116BCPZ80-500R7

Overview

AD5116BCPZ80-500R7 from Analog Devices is a single-channel, 64-position, nonvolatile digital potentiometer with ±8% end-to-end resistance tolerance, push-button interface, and 80 kΩ nominal resistance. It operates from 2.3 V to 5.5 V, supports −40°C to +125°C, and features adaptive debouncing, EEPROM wiper storage, and low 45 Ω bottom-scale wiper resistance. It replaces mechanical potentiometers in LCD contrast control and sensor calibration.

For engineers reviewing the AD5116BCPZ80-500R7 datasheet, AD5116BCPZ80-500R7 pinout, AD5116BCPZ80-500R7 application, or AD5116BCPZ80-500R7 equivalent, key selection criteria include guaranteed ±8% RAB tolerance, push-button-only control (no I²C/up-down), 80 kΩ resistance option, 2 mm × 2 mm LFCSP package, and automatic EEPROM save enable via ASE pin.

Technical Context

The AD5116BCPZ80-500R7 implements a segmented RDAC architecture with top-scale and bottom-scale modes to minimize wiper resistance-reaching 45 Ω at RBS and 70 Ω at RTS. Its adaptive debouncer rejects contact bounce by requiring ≥8 ms high pulse on PU/PD for manual increment and ≥1 s for auto-scan mode.

It uses internal EEPROM to retain wiper position across power cycles, with <50 μs power-on restore time and 50-year data retention at 125°C. The ASE pin serves dual roles: enabling automatic save (low = enabled) and indicating end-scale reach (pulled high during PD/PU activation at RBS/RTS).

Key Specifications

Pinout & Package

AD5116BCPZ80-500R7 is housed in a 2 mm × 2 mm × 0.55 mm, 8-lead LFCSP package with exposed pad (internally floating). Pin 1 = VDD, Pin 2 = A, Pin 3 = W, Pin 4 = B, Pin 5 = GND, Pin 6 = PD, Pin 7 = PU, Pin 8 = ASE.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital potentiometer applications.

Compared with AD5113BCPZ80-500R7 and AD5171BRMZ80-500RL7, the AD5116BCPZ80-500R7 uniquely delivers push-button autonomy, automatic EEPROM save, and hardware end-scale signaling - eliminating MCU dependency while ensuring repeatable power-on behavior in embedded calibration and user-interface applications.

Availability

AD5116BCPZ80-500R7 is available at Aetrix Electronics and suitable for LCD panel contrast control, portable audio volume adjustment, sensor calibration offset trim, and programmable feedback resistor applications requiring stable component supply, long-term EEPROM retention, and push-button usability.

Supply support for AD5116BCPZ80-500R7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The AD5116 product line delivers nonvolatile, push-button-controlled digital potentiometers optimized for mechanical replacement in space-constrained, low-power, and calibration-critical applications - emphasizing ease of integration, temperature stability, and field-reprogrammability.

FAQ

What is the resistance value and tolerance of the AD5116BCPZ80-500R7?

The AD5116BCPZ80-500R7 has a nominal end-to-end resistance (RAB) of 80 kΩ with a guaranteed maximum tolerance of ±8%. This tolerance is specified across the full operating temperature range (−40°C to +125°C) and applies to all 64 wiper positions. The ±8% spec enables open-loop use in applications like sensor calibration and LCD biasing without post-production trimming. The AD5116BCPZ80-500R7 achieves this via laser-trimmed thin-film resistor arrays and patented RDAC segmentation architecture.

How does the push-button interface of the AD5116BCPZ80-500R7 work?

The AD5116BCPZ80-500R7 uses two dedicated pins - PU (Pin 7) and PD (Pin 6) - for direct tactile switch connection. Both pins feature internal 100 kΩ pull-down resistors and respond to active-high logic. A ≥8 ms PU pulse increments the wiper by one step; holding PU >1 s enters auto-scan mode (140 ms/step). PD operates identically for decrement. The built-in adaptive debouncer ignores contact bounce, making mechanical switches reliable without external RC filtering. No MCU or clock is required - the AD5116BCPZ80-500R7 handles all timing internally.

What is the function of the ASE pin on the AD5116BCPZ80-500R7?

The ASE (Pin 8) on the AD5116BCPZ80-500R7 serves two distinct hardware functions: (1) Auto-Save Enable - pulled low at power-up to activate automatic EEPROM storage after 1 second of input inactivity; pulled high to disable auto-save and require manual ASE-triggered store; (2) End-Scale Indicator - driven high by the AD5116BCPZ80-500R7 when PU or PD is asserted while the wiper is at top scale (RTS) or bottom scale (RBS), providing real-time hardware feedback for UI end-stop detection. ASE requires an external pull-up or pull-down resistor per configuration.

Does the AD5116BCPZ80-500R7 retain its wiper position after power cycling?

Yes, the AD5116BCPZ80-500R7 retains its wiper position after power cycling via on-chip EEPROM. When auto-save is enabled (ASE pulled low at power-up), the device automatically stores the current RDAC register value to EEPROM after 1 second of inactivity on PU/PD. On subsequent power-up, it restores that value in <50 μs. Manual save is also supported by pulsing ASE low for ≥8 ms. EEPROM guarantees 50 years of data retention at 125°C and 1 million write cycles - making the AD5116BCPZ80-500R7 suitable for permanent calibration storage in industrial equipment.

What is the minimum wiper resistance of the AD5116BCPZ80-500R7 and why does it matter?

The AD5116BCPZ80-500R7 achieves a minimum wiper resistance of 45 Ω at bottom scale (RBS) between terminals W and B, and 70 Ω at top scale (RTS) between A and W. This is significantly lower than typical digital potentiometer wiper resistances (>100 Ω). Low RBS reduces insertion loss and voltage error in rheostat-mode current-setting applications - such as sensor biasing or LED current control - where even small wiper resistance degrades accuracy. The AD5116BCPZ80-500R7 achieves this via dedicated top/bottom scale circuitry that bypasses standard 1-LSB segments, and the value is verified across temperature and supply voltage.