Renesas ISL95711UIU10Z-T

Overview

ISL95711UIU10Z-T from Renesas (formerly Intersil) is a digitally controlled potentiometer (XDCP™) with 128-tap resolution, ±5V terminal voltage capability, I²C serial interface, and nonvolatile initial value register (IVR) for power-up wiper recall. It functions as a three-terminal potentiometer or two-terminal rheostat in precision biasing and calibration circuits.

For engineers reviewing the ISL95711UIU10Z-T datasheet, ISL95711UIU10Z-T pinout, ISL95711UIU10Z-T application, or ISL95711UIU10Z-T equivalent, this device supports industrial control loop tuning, amplifier gain/bias adjustment, and programmable voltage divider design requiring stable end-to-end resistance (50kΩ ±20%), ratiometric tempco (±4ppm/°C), and EEPROM retention (50 years).

Technical Context

The ISL95711UIU10Z-T implements a 127-element resistor array with CMOS wiper switches operating in make-before-break mode, enabling monotonic tap transitions and preventing open-circuit glitches during position changes. Its dual-supply architecture (VCC = +2.7V to +5.5V, V− = −2.7V to −5.5V) supports bipolar operation across RH–RL terminals.

Control is handled via standard I²C protocol (400kHz max) with hardwired slave address selection (A1/A0 pins), supporting up to four devices on one bus. The volatile Wiper Register (WR) and nonvolatile Initial Value Register (IVR) are accessed through address 00h, with Access Control Register (ACR) at 02h determining read/write targeting-ensuring deterministic power-on behavior and runtime reconfiguration.

Key Specifications

Pinout & Package

ISL95711UIU10Z-T is housed in a Pb-free, RoHS-compliant 10-lead MSOP package (M10.118), optimized for space-constrained industrial PCB layouts and compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5175BRMZ-50 and MCP45HV51-503E/MS, the ISL95711UIU10Z-T uniquely delivers bipolar terminal voltage support (±5V), superior ratiometric temperature coefficient (±4ppm/°C), and integrated power-up recall-making it the only option among the three suitable for precision AC-coupled or dual-rail analog systems requiring guaranteed startup behavior.

Availability

ISL95711UIU10Z-T is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable op-amp biasing, and automotive HVAC control requiring stable component supply, long-term parametric consistency, and RoHS-compliant packaging.

Supply support for ISL95711UIU10Z-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 Corporation acquired Intersil in 2017 and maintains its precision analog portfolio, including XDCP™ digitally controlled potentiometers, with focus on high-reliability industrial and automotive applications.

The ISL95711UIU10Z-T belongs to Renesas' XDCP™ family, designed specifically for replacing mechanical potentiometers in systems demanding programmable analog adjustment, nonvolatile state retention, and robust performance across extended temperature ranges.

FAQ

What is the power-up behavior of the ISL95711UIU10Z-T?

At power-up, the ISL95711UIU10Z-T first resets the volatile Wiper Register (WR) to 64h (center position), then reads the nonvolatile Initial Value Register (IVR) once both V− < −2.5V and VCC > +2.5V are met. The IVR value is loaded into WR, establishing the final wiper position. This sequence ensures deterministic startup without external intervention.

Does the ISL95711UIU10Z-T support bipolar voltage operation?

Yes, the ISL95711UIU10Z-T supports true bipolar operation: RH, RL, and RW terminals tolerate voltages from V− (−5.5V) to VCC (+5.5V). This enables direct integration into dual-supply op-amp circuits, AC signal paths, and systems requiring negative reference potentials-unlike most digital potentiometers limited to unipolar rails.

How many devices can share the same I²C bus with the ISL95711UIU10Z-T?

Up to four ISL95711UIU10Z-T devices can operate on a single I²C bus using the A1 and A0 address select pins. These pins configure the two least-significant bits of the 7-bit slave address (01010xx), allowing unique addressing without external logic or multiplexing.

What is the difference between volatile and nonvolatile register access in the ISL95711UIU10Z-T?

Volatile access (WR) changes wiper position immediately but is lost on power loss; nonvolatile access (IVR) writes persist across power cycles. The Access Control Register (ACR) at address 02h selects target: ACR = 00h enables IVR read/write (and auto-WR update), while ACR = 80h enables WR-only access-providing precise control over persistence behavior in the ISL95711UIU10Z-T.

Can the ISL95711UIU10Z-T be used in rheostat mode?

Yes, the ISL95711UIU10Z-T supports rheostat mode by connecting either RH or RL to a fixed potential and using RW as the variable terminal. In this configuration, resistance between RW and the grounded terminal varies from near-zero to 50kΩ, enabling programmable current limiting, gain control, or sensor excitation-while retaining monotonicity and ±4ppm/°C ratiometric stability.