Renesas ISL22323WFV14Z

Overview

ISL22323WFV14Z from Renesas (formerly Intersil) is a dual digitally controlled potentiometer (XDCP) with 10kΩ end-to-end resistance, 256-tap resolution, I²C interface, and dual-supply operation (VCC = 2.25–5.5V, V− = −2.25 to −5.5V). It integrates two independent DCPs, non-volatile initial value registers (IVR), volatile wiper registers (WR), and 13 general-purpose EEPROM registers. Used for precision biasing and gain control in bipolar signal conditioning circuits.

For engineers reviewing the ISL22323WFV14Z datasheet, ISL22323WFV14Z pinout, ISL22323WFV14Z application, or ISL22323WFV14Z equivalent, key selection considerations include its 10kΩ resistance option, 14-lead TSSOP package, −40°C to +125°C extended industrial temperature range, wiper resistance of 70Ω typical, and dual-supply capability enabling true bipolar terminal voltage swing from V− to VCC.

Technical Context

The ISL22323WFV14Z implements two independent resistor arrays using CMOS-switched ladder networks, each with 256 discrete tap positions controlled via 8-bit volatile Wiper Registers (WR0/WR1). Wiper movement follows "make-before-break" switching to prevent open-circuit transients. At power-up, non-volatile Initial Value Registers (IVR0/IVR1) auto-load into WR registers, ensuring repeatable startup states.

Its I²C interface supports up to eight devices per bus via three hardware address pins (A0–A2), operates at 400kHz maximum clock frequency, and features open-drain SDA/SCL with internal logic-level thresholds (VIH = 0.7×VCC, VIL = 0.3×VCC). The device includes dedicated Access Control Register (ACR) for volatile/non-volatile register selection and shut-down mode control.

Key Specifications

Pinout & Package

ISL22323WFV14Z is housed in a 14-lead TSSOP (RoHS-compliant, pkg drawing M14.173) with exposed pad internally connected to V−. Pin 1 is SDA; pin 14 is VCC. No NC pins in this variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ISL22323WFV14Z, ISL22323TFV14Z offers higher resistance for reduced current draw in high-Z nodes, while AD5242BRUZ10 sacrifices dual-channel capability, bipolar operation, and non-volatile GP storage - making it unsuitable for precision bipolar calibration or multi-parameter trimming.

Availability

ISL22323WFV14Z is available at Aetrix Electronics and suitable for industrial sensor calibration, motor drive current sensing, and bipolar op-amp bias networks requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for ISL22323WFV14Z 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. Renesas is a global semiconductor leader focused on microcontrollers, analog, power, and connectivity solutions.

The ISL22323WFV14Z belongs to Renesas' XDCP (eXternally Digitally Controlled Potentiometer) family, designed specifically for replacing mechanical potentiometers in high-reliability, programmable analog systems requiring non-volatile settings, wide temperature operation, and bipolar signal handling.

FAQ

What is the resistance tolerance and temperature coefficient of the ISL22323WFV14Z?

The ISL22323WFV14Z has a total resistance tolerance of ±20% and an end-to-end temperature coefficient of ±85ppm/°C (W-option, 10kΩ). This spec applies across the full −40°C to +125°C operating range and directly impacts absolute accuracy in precision voltage divider or rheostat configurations. The ratiometric tempco (TCV) is tighter at ±4ppm/°C, benefiting applications where relative tap-to-tap matching matters more than absolute resistance value.

Does the ISL22323WFV14Z support true bipolar operation, and how is it implemented?

Yes, the ISL22323WFV14Z supports true bipolar operation via separate VCC and V− supply pins. Its DCP terminals (RHx, RLx, RWx) can swing from V− to VCC - e.g., −5.5V to +5.5V - enabling direct interfacing with bipolar op-amps and AC-coupled signal chains without level shifters. The internal CMOS switches and resistor ladders are designed for symmetrical conduction in both polarities, verified by matched INL/DNL performance across the full voltage range.

How many non-volatile registers does the ISL22323WFV14Z include, and what are their functions?

The ISL22323WFV14Z includes two non-volatile Initial Value Registers (IVR0/IVR1) for storing default wiper positions and thirteen general-purpose non-volatile registers (addresses 02h–0Eh). These GP registers retain data for 50 years at ≤+55°C and are commonly used to store factory calibration coefficients, device serial numbers, or lookup tables for multi-point linearization - all accessible via the same I²C interface used for wiper control.

What is the wiper response time and recall behavior after power-up for the ISL22323WFV14Z?

The ISL22323WFV14Z exhibits a wiper response time of 1.5µs from SCL falling edge to new position settling (tWRT), and a power-up recall time of 5ms from VCC crossing Vpor (2.1V min) to IVR-loaded wiper stabilization (tD). During this interval, the wipers default to midpoint (80h) until IVR contents are loaded - ensuring safe startup even if non-volatile memory is uninitialized or corrupted.

Can the ISL22323WFV14Z be used in shut-down mode, and what are the current savings?

Yes, the ISL22323WFV14Z supports shut-down mode via the SHDN bit in the Access Control Register (ACR). When enabled, DCP functionality is disabled and both VCC and V− supply currents drop to <4µA max (ISD/IV-SD), reducing system standby power without losing wiper register contents. The wiper position remains intact in volatile WR registers, allowing immediate resumption of analog function upon exit from shut-down.