Renesas ISL22316UFRT10Z-TK

Overview

ISL22316UFRT10Z-TK from Renesas (formerly Intersil) is a single-channel digitally controlled potentiometer (XDCP™) with I²C interface, 128-tap resolution, non-volatile wiper position storage, and 50kΩ end-to-end resistance in a 10-lead TDFN package. It operates from 2.7V to 5.5V, supports -40°C to +125°C, and delivers <±0.5 LSB DNL in voltage divider mode for precision analog trimming in industrial sensor signal conditioning.

For engineers reviewing the ISL22316UFRT10Z-TK datasheet, ISL22316UFRT10Z-TK pinout, ISL22316UFRT10Z-TK application, or ISL22316UFRT10Z-TK equivalent, this device serves as a programmable resistor for calibration, gain/offset adjustment, and power supply feedback loop tuning where EEPROM-retained settings and low 70Ω typical wiper resistance are critical design requirements.

Technical Context

The ISL22316UFRT10Z-TK implements a monolithic CMOS resistor ladder with CMOS switch matrix controlled by a 7-bit volatile Wiper Register (WR), recalled at power-up from a non-volatile Initial Value Register (IVR). Its I²C interface uses open-drain SDA/SCL with two address pins (A0/A1), supporting up to four devices per bus.

Shutdown mode is activated via active-low SHDN pin or ACR register bit, placing RH–RL in open-circuit and RW–RL in short-circuit while retaining register access. The device features "make-before-break" switching, 1.5µs wiper response time, and ±50ppm/°C end-to-end tempco for the 50kΩ variant.

Key Specifications

Pinout & Package

ISL22316UFRT10Z-TK is housed in a Pb-free, RoHS-compliant 10-lead 3×3 mm TDFN package (PKG DWG L10.3x3B) with exposed thermal pad. Pin numbering follows top-view orientation with pin 1 at bottom-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ISL22316UFRT10Z-TK, AD5175BRMZ-50-R7 offers finer resolution and better temperature stability but requires SPI infrastructure and external non-volatile storage for power-up recall; MCP45HV51-503E/ST extends voltage range to 12V but sacrifices wiper resistance performance and guaranteed extended temperature operation.

Availability

ISL22316UFRT10Z-TK is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supply trimming, and medical instrument gain adjustment requiring stable component supply across long production lifecycles.

Supply support for ISL22316UFRT10Z-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 Corporation (acquired Intersil in 2017) is a global leader in microcontrollers, analog, and power management ICs, serving industrial, automotive, and infrastructure markets with high-reliability solutions.

The ISL22316UFRT10Z-TK belongs to Renesas' XDCP™ digitally controlled potentiometer family, designed specifically for replacing mechanical trimmers in harsh-environment applications demanding non-volatile setting retention and precise analog tuning.

FAQ

What is the total resistance and tolerance of ISL22316UFRT10Z-TK?

The ISL22316UFRT10Z-TK has a nominal end-to-end resistance of 50kΩ with a tolerance of ±20% across temperature and unit-to-unit variation. This value is specified in the Analog Specifications table of the FN6186 datasheet under RTOTAL for the "U option", and applies to the RH-to-RL terminals under recommended operating conditions.

Does ISL22316UFRT10Z-TK support I²C standard-mode or fast-mode?

ISL22316UFRT10Z-TK supports I²C fast-mode operation at up to 400kHz clock frequency, as confirmed by the fSCL parameter in the Serial Interface Specifications section (page 5 of FN6186). The device meets timing requirements for tLOW, tHIGH, and tBUF at this rate with capacitive loading up to 400pF.

How does the shutdown function affect the DCP terminals in ISL22316UFRT10Z-TK?

In shutdown mode (activated by pulling SHDN pin low or setting SHDN bit in ACR), ISL22316UFRT10Z-TK opens the RH–RL path and shorts RW to RL. The wiper position remains stored, and I²C communication stays fully functional-allowing register reads/writes while the analog element is isolated.

What is the wiper resistance specification for ISL22316UFRT10Z-TK and why does it matter?

The ISL22316UFRT10Z-TK has a typical wiper resistance of 70Ω at VCC = 3.3V, with a maximum of 200Ω. This low value minimizes insertion error in precision applications-for example, in a 50kΩ feedback resistor, 70Ω contributes only 0.14% gain error, preserving closed-loop accuracy in op-amp circuits.

Can ISL22316UFRT10Z-TK be used in rheostat mode, and what are the key limitations?

Yes, ISL22316UFRT10Z-TK supports rheostat mode by connecting either RH or RL to RW and leaving the unused terminal unconnected. Key limitations include ±1 LSB integral non-linearity (RINL) and ±1 MI differential non-linearity (RDNL) for the 50kΩ variant, as specified in the Analog Specifications table on page 4 of FN6186.