Renesas ISL23711UIU10Z

Overview

ISL23711UIU10Z from Intersil is a volatile digitally controlled potentiometer (XDCP™) with 128-tap resolution, I²C serial interface, and 50 kΩ end-to-end resistance. It operates from ±2.7 V to ±5.5 V supplies, supports ±3 V or ±5 V terminal voltage ranges, and functions as a three-terminal potentiometer or two-terminal variable resistor in precision analog biasing circuits.

For engineers reviewing the ISL23711UIU10Z datasheet, ISL23711UIU10Z pinout, ISL23711UIU10Z application, or ISL23711UIU10Z equivalent, key selection criteria include wiper register volatility, ratiometric tempco (±4 ppm/°C), wiper resistance (70 Ω typ), I²C slave address configurability (A0/A1), and MSOP-10 package compatibility for space-constrained industrial control designs.

Technical Context

The ISL23711UIU10Z implements a 127-element resistor array with CMOS wiper switches operating in make-before-break mode, enabling monotonic resistance transitions between RH and RL terminals. Its 7-bit volatile wiper register (WR) directly controls tap position, with power-on reset to 64 (center position).

I²C communication uses hardwired slave addressing via A0/A1 pins-supporting up to four devices on one bus-with standard-mode timing (400 kHz max SCL), open-drain SDA, and defined setup/hold timing for START/STOP/data. The device supports both voltage divider and resistor modes with specified INL (±1 LSB), DNL (±0.5 LSB), and TCR (±50 ppm/°C).

Key Specifications

Pinout & Package

ISL23711UIU10Z is housed in a Pb-free 10-lead MSOP package (JEDEC MO-187BA, pkg drawing M10.118), measuring 3.0 mm × 4.9 mm × 1.0 mm with 0.5 mm lead pitch. The package supports reflow soldering per IPC/JEDEC J-STD-020 Pb-free peak profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ISL23711UIU10Z, AD5175BRMZ-50 trades volatile operation for nonvolatile retention and adds SPI complexity, while MCP45HV51-502E/MS extends voltage range but sacrifices bipolar functionality-making ISL23711UIU10Z uniquely suited for ±supply precision analog trimming where I²C integration and ultra-low standby power are mandatory.

Availability

ISL23711UIU10Z is available at Aetrix Electronics and suitable for industrial sensor biasing, automotive cabin control, programmable amplifier gain, medical instrument calibration, and precision analog trimming applications requiring stable component supply and long-term sourcing continuity.

Supply support for ISL23711UIU10Z 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

Intersil Corporation (now part of Renesas Electronics) is a U.S.-based analog and mixed-signal semiconductor company specializing in precision power management, interface, and signal conditioning ICs.

The ISL23711UIU10Z belongs to Intersil's XDCP™ (eXternally Controlled Digital Potentiometer) product line, designed specifically for replacing mechanical potentiometers in industrial, automotive, and medical systems requiring programmable analog adjustment with I²C simplicity and bipolar voltage support.

FAQ

What is the resistance tolerance and temperature coefficient of the ISL23711UIU10Z?

The ISL23711UIU10Z has a 50 kΩ end-to-end resistance with ±20% tolerance across units. Its ratiometric temperature coefficient is ±4 ppm/°C, ensuring stable voltage division ratios over the −40°C to +85°C operating range. The absolute resistance temperature coefficient is ±50 ppm/°C, measured across the full tap range from 16 to 127 decimal.

Does the ISL23711UIU10Z retain its wiper setting after power loss?

No, the ISL23711UIU10Z uses volatile wiper register storage. Upon power cycling, the wiper resets to position 64 (hex 20h), corresponding to the center of the 128-tap range. Host firmware must reinitialize the desired wiper position via I²C after each power-up sequence to maintain calibrated settings.

Can the ISL23711UIU10Z operate with bipolar supplies such as ±5 V?

Yes, the ISL23711UIU10Z supports true bipolar operation: VCC may be +5.5 V, V− may be −5.5 V, and RH/RW/RL terminals tolerate voltages from V− to VCC. This allows direct use in ±5 V signal chains-for example, with RH = +5 V, RL = −5 V, and RW delivering a programmable voltage between them.

How many ISL23711UIU10Z devices can share the same I²C bus?

Up to four ISL23711UIU10Z devices can share a single I²C bus using the A0 and A1 address select pins, which configure the two least-significant bits of the 7-bit slave address (01010xx). Each device must have a unique A0/A1 combination to avoid address collisions during read/write operations.

What is the wiper resistance specification for the ISL23711UIU10Z, and why does it matter?

The ISL23711UIU10Z specifies 70 Ω typical wiper resistance at VCC = 3.3 V. This low on-resistance minimizes insertion error in voltage divider configurations and avoids significant loading effects when driving high-impedance op-amp inputs-critical for maintaining gain accuracy and linearity in precision analog circuits.