Renesas ISL22316UFU10Z

Overview

ISL22316UFU10Z from Renesas (formerly Intersil) is a single-channel digitally controlled potentiometer (XDCP™) with I²C interface, 128-tap resolution, non-volatile wiper position storage, and 50 kΩ end-to-end resistance. It operates from 2.7V to 5.5V, features 70 Ω typical wiper resistance at 3.3V, and supports shutdown mode with ≤5 µA current. It is used in precision analog trimming, sensor calibration, and programmable gain control circuits.

For engineers reviewing the ISL22316UFU10Z datasheet, ISL22316UFU10Z pinout, ISL22316UFU10Z application, or ISL22316UFU10Z equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, and two confirmed alternative parts for industrial-grade analog adjustment systems requiring extended temperature operation (–40°C to +125°C) and long-term parameter retention.

Technical Context

The ISL22316UFU10Z implements a monolithic CMOS resistor ladder with CMOS switch-based wiper positioning, controlled via I²C bus using a 7-bit volatile Wiper Register (WR) and non-volatile Initial Value Register (IVR). Its "make-before-break" switching ensures glitch-free tap transitions.

It supports dual operating modes: voltage divider (three-terminal RH–RW–RL) and rheostat (two-terminal RW–RL or RW–RH), with monotonicity guaranteed across all 128 taps. Shutdown mode disconnects RH and shorts RW to RL while preserving register access over I²C.

Key Specifications

Pinout & Package

ISL22316UFU10Z is housed in a Pb-free 10-lead MSOP package (M10.118), 3.0 mm × 3.0 mm × 1.0 mm profile, suitable for space-constrained PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ISL22316UFU10Z, AD5175BRMZ-50 offers higher resolution but lacks hardware shutdown, while MCP45HV51-503E/MS supports 12V analog rails but sacrifices pin separation for compactness-making ISL22316UFU10Z optimal for robust, low-power, I²C-based trimming in 3.3V/5V industrial designs.

Availability

ISL22316UFU10Z is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable gain amplifier design, and automotive cabin climate control systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ISL22316UFU10Z 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

Renesas Electronics (acquired Intersil in 2017) is a global leader in microcontrollers, analog, and power management ICs, serving industrial, automotive, and infrastructure markets with high-reliability solutions.

The ISL22316UFU10Z belongs to Renesas' XDCP™ (eXternally Digitally Controlled Potentiometer) family, designed specifically for replacing mechanical trimpots in automated calibration, closed-loop control, and adaptive analog signal conditioning systems.

FAQ

What is the resistance tolerance and temperature coefficient of ISL22316UFU10Z?

The ISL22316UFU10Z has a total resistance tolerance of ±20% and an end-to-end temperature coefficient of ±80 ppm/°C (U-option, 50 kΩ version). These values are specified over –40°C to +125°C and ensure predictable drift behavior in high-temperature environments such as automotive engine compartments or industrial motor controls. The ratiometric temperature coefficient is ±4 ppm/°C, supporting stable voltage-divider operation.

Does ISL22316UFU10Z support multiple devices on the same I²C bus?

Yes, ISL22316UFU10Z supports up to four devices on a single I²C bus using hardware address pins A0 and A1. These pins configure the two least-significant bits of the 7-bit slave address (0x54–0x57), enabling independent read/write access without software address remapping. Each device retains its own non-volatile IVR and volatile WR registers.

How does shutdown mode affect the DCP terminals in ISL22316UFU10Z?

In shutdown mode-activated by pulling SHDN low or setting ACR[6]=0-the ISL22316UFU10Z opens the RH terminal and shorts RW to RL. This isolates the high-side path while grounding the wiper, preventing unintended current flow through the potentiometer. Importantly, the I²C interface remains fully accessible, allowing register reads and writes even during shutdown.

What is the wiper response time and recall time from shutdown for ISL22316UFU10Z?

The ISL22316UFU10Z achieves a wiper response time of 1.5 µs from SCL falling edge to new tap position, and a shutdown recall time of 1.5 µs from SHDN rising edge to restored wiper position and RH connection. These sub-microsecond timings enable fast reconfiguration in real-time control loops, such as adaptive filter tuning or dynamic sensor compensation.

Can ISL22316UFU10Z be used in rheostat mode, and what are the limitations?

Yes, ISL22316UFU10Z can operate in rheostat mode by connecting either RH or RL to GND (or VCC) and using RW with the remaining terminal. In this configuration, resistance between RW and RL (or RW and RH) varies from ~70 Ω to 50 kΩ. Integral non-linearity is ±1 MI, and differential non-linearity is ±1 MI (W-option) or ±0.5 MI (U-option), ensuring monotonic behavior essential for current-source programming.