Renesas ISL95711WIU10Z-T

Overview

ISL95711WIU10Z-T from Renesas (formerly Intersil) is a digitally controlled potentiometer (XDCP™) implementing a 128-tap resistor array with nonvolatile wiper position storage, I²C serial interface, ±2.7V to ±5.5V dual-supply operation, and 10kΩ end-to-end resistance. It functions as a precision three-terminal potentiometer or two-terminal rheostat in bias adjustment circuits for op-amps and power management systems.

For engineers reviewing the ISL95711WIU10Z-T datasheet, ISL95711WIU10Z-T pinout, ISL95711WIU10Z-T application, or ISL95711WIU10Z-T equivalent, this device supports I²C slave addressing via A0/A1 pins, power-up wiper recall from nonvolatile memory, ±4 ppm/°C ratiometric tempco in voltage divider mode, and operation across -40°C to +85°C industrial temperature range.

Technical Context

The ISL95711WIU10Z-T integrates a 127-element resistor ladder with CMOS wiper switches, a 7-bit volatile Wiper Register (WR), and a nonvolatile Initial Value Register (IVR) that loads WR at power-up. Its dual-supply architecture (VCC = +2.7V to +5.5V, V− = −2.7V to −5.5V) enables true bipolar operation across RH–RL terminals.

I²C communication uses hardwired slave address (A1/A0 configurable for up to four devices per bus), supports standard-mode (400 kHz) timing, and implements make-before-break switching during tap transitions. The Access Control Register (ACR) at address 02h determines whether reads/writes to address 00h target the IVR (ACR = 00h) or WR (ACR = 80h).

Key Specifications

Pinout & Package

ISL95711WIU10Z-T is housed in a Pb-free, RoHS-compliant 10-lead MSOP package (M10.118), with exposed pad not internally connected. Pin spacing is 0.5 mm, body dimensions 3.0 mm × 3.0 mm × 1.0 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5171BRMZ-10 and MCP45HV51-103E/MS, the ISL95711WIU10Z-T uniquely delivers 128-tap resolution with true bipolar ±5.5V operation and ±4 ppm/°C ratiometric tempco - making it optimal for high-stability, dual-rail analog tuning where I²C integration is required.

Availability

ISL95711WIU10Z-T is available at Aetrix Electronics and suitable for industrial sensor calibration, op-amp bias networks, and power supply feedback tuning requiring stable component supply, long-term calibration retention, and I²C-configurable analog adjustment.

Supply support for ISL95711WIU10Z-T 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 and continues to support its precision analog portfolio, including XDCP™ digitally controlled potentiometers designed for high-reliability industrial and automotive systems.

The ISL95711WIU10Z-T belongs to Renesas' XDCP™ family, engineered specifically for replacing mechanical potentiometers in applications demanding nonvolatile setting retention, low tempco, and digital configurability via industry-standard serial interfaces.

FAQ

What is the default wiper position after power-up for the ISL95711WIU10Z-T?

At power-up, the ISL95711WIU10Z-T defaults the wiper to code 64 (midpoint) until the nonvolatile Initial Value Register (IVR) is successfully read and loaded into the volatile Wiper Register (WR). This occurs once both VCC ≥ 2.5V and V− ≤ −2.5V are met. The factory-default IVR value is 40h (64 decimal), so the final stable wiper position remains at center unless previously reprogrammed.

Does the ISL95711WIU10Z-T support true bipolar operation?

Yes, the ISL95711WIU10Z-T supports true bipolar operation: RH, RL, and RW terminals operate from V− to VCC, with V− rated from −2.7V to −5.5V and VCC from +2.7V to +5.5V. This allows the wiper to swing across a full ±5.5V range when configured in voltage divider mode - a capability not found in unipolar DCPs like the AD5171.

How many devices can share the same I²C bus with the ISL95711WIU10Z-T?

Up to four ISL95711WIU10Z-T devices can share one I²C bus using the A0 and A1 address select pins, which configure the two LSBs of the 7-bit slave address (0x54–0x57). No external address translation or multiplexing is required - each device responds only to its assigned address.

What is the maximum allowable voltage across RH and RL terminals of the ISL95711WIU10Z-T?

The absolute maximum voltage across RH and RL (|V(RH) − V(RL)|) is 12V. This limit applies regardless of VCC or V− levels. For reliable operation within specifications, the RH–RL differential should remain ≤10V when using the full ±5.5V supply range to maintain linearity and avoid exceeding internal switch ratings.

Can the ISL95711WIU10Z-T be used in rheostat mode, and what is its wiper resistance?

Yes, the ISL95711WIU10Z-T supports rheostat mode by connecting either RH or RL to RW and using the remaining terminal with RW. Its typical wiper resistance is 70Ω at VCC = +5.5V/V− = −5.5V, with a maximum of 200Ω - significantly lower than many competing DCPs, reducing insertion error in current-sensing and gain-control applications.