Renesas ISL22326WFR16Z-TK

Overview

ISL22326WFR16Z-TK from Renesas Electronics is a dual digitally controlled potentiometer (XDCP™) IC with non-volatile wiper storage, 128-tap resolution, I²C interface, and 10kΩ end-to-end resistance. It operates from 2.7V to 5.5V, supports shutdown mode (≤5µA), and is packaged in a 16-lead QFN for space-constrained analog trimming applications such as precision sensor calibration and programmable gain control.

For engineers reviewing the ISL22326WFR16Z-TK datasheet, ISL22326WFR16Z-TK pinout, ISL22326WFR16Z-TK application, or ISL22326WFR16Z-TK equivalent, this device delivers deterministic wiper recall at power-up, low 70Ω typical wiper resistance at 3.3V, and robust 1M-cycle EEPROM endurance - critical for field-deployed industrial and automotive systems requiring long-term parameter retention without external memory.

Technical Context

The ISL22326WFR16Z-TK integrates two independent 7-bit (128-position) DCPs on a monolithic CMOS die, each with volatile Wiper Register (WR) and non-volatile Initial Value Register (IVR). Wiper position is updated via I²C commands (address pins A0–A2 support up to eight devices per bus), and power-up automatically loads IVR values into WRs.

Its resistor array uses make-before-break CMOS switches to ensure glitch-free transitions; shutdown mode disconnects RH terminals and shorts RW to RL while preserving register access over I²C. The device supports both voltage-divider and rheostat configurations, with ±50 ppm/°C ratiometric temperature coefficient and monotonic DNL ≤ ±0.5 LSB in voltage-divider mode.

Key Specifications

Pinout & Package

ISL22326WFR16Z-TK is housed in a 16-lead QFN package (4mm × 4mm, 0.5mm pitch) with exposed thermal pad internally connected to GND. Pin 1 is located at top-left corner (marking dot adjacent), and pin numbering follows standard QFN top-view clockwise sequence.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5170BRMZ-10 and MCP45HV51-103E/ST, the ISL22326WFR16Z-TK uniquely combines dual-channel operation, hardware shutdown, and guaranteed power-up IVR recall - eliminating firmware dependency for critical analog initialization in safety-compliant systems.

Availability

ISL22326WFR16Z-TK is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable gain amplifiers, laser diode bias control, and automotive HVAC blower control requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for ISL22326WFR16Z-TK 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 is a global semiconductor leader specializing in microcontrollers, analog power, and mixed-signal solutions for industrial, automotive, and infrastructure markets.

The ISL22326WFR16Z-TK belongs to Renesas' XDCP™ family of digitally controlled potentiometers, designed specifically for replacing mechanical trimmers in high-reliability analog systems where long-term stability, non-volatility, and I²C configurability are mandatory.

FAQ

What is the total resistance and tolerance of the ISL22326WFR16Z-TK?

The ISL22326WFR16Z-TK has a nominal total resistance of 10kΩ (W option) with a tolerance of ±20% over the full temperature range (-40°C to +125°C). This value is specified for both DCP0 and DCP1 and is confirmed in the Analog Specifications section (Page 5) of the FN6176 datasheet under "RH to RL Resistance Tolerance."

Does the ISL22326WFR16Z-TK support automatic wiper recall at power-up?

Yes, the ISL22326WFR16Z-TK automatically recalls the contents of its non-volatile Initial Value Registers (IVR0 and IVR1) into the corresponding volatile Wiper Registers (WR0 and WR1) during power-up, provided VCC exceeds the 2.0V–2.6V power-on reset threshold. This behavior is guaranteed by internal circuitry and does not require host I²C interaction.

What package type and pin count does the ISL22326WFR16Z-TK use?

The ISL22326WFR16Z-TK is supplied in a 16-lead QFN package (4mm × 4mm, 0.5mm pitch) with an exposed thermal pad internally connected to GND. Pin assignments match the "16 LD QFN" configuration shown in Figure 3 (Page 3) of the FN6176 datasheet, and the part marking suffix "-TK" explicitly denotes this QFN variant.

Can the ISL22326WFR16Z-TK operate on a 3.3V supply and communicate with standard I²C masters?

Yes, the ISL22326WFR16Z-TK operates across 2.7V–5.5V and is fully compatible with standard 3.3V I²C masters. Its SCL/SDA inputs meet I²C voltage thresholds (VIH ≥ 0.7×VCC, VIL ≤ 0.3×VCC), and it supports up to 400kHz fast-mode timing - verified in Sections 2.5 and 2.6 of the FN6176 datasheet.

How does shutdown mode affect the DCP terminals in the ISL22326WFR16Z-TK?

In shutdown mode (activated by pulling SHDN pin low or setting SHDN bit in ACR), the ISL22326WFR16Z-TK opens the RH0/RH1 connections and shorts RW0–RL0 and RW1–RL1. This creates a low-resistance bypass path while preserving all register contents and maintaining full I²C accessibility - a key differentiator from simpler digital potentiometers.