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ISL23445TFRZ is listed in the Digital Potentiometers range at ChipApex. The manufacturer field lists Renesas Electronics Corporation. Its product description is IC DGT POT 100KOHM 256TAP 20QFN. Review the specifications below when checking this part for your BOM.
Digital Potentiometers specifications for ISL23445TFRZ
- Description：IC DGT POT 100KOHM 256TAP 20QFN
- Series：XDCP™
- Mfr：Renesas Electronics Corporation
- Package：Tube
- Taper：Linear
- Configuration：Potentiometer
- Number of Circuits：4
- Number of Taps：256
- Resistance (Ohms)：100k
- Interface：SPI
- Memory Type：Volatile
- Voltage - Supply：1.2V ~ 5.5V, 1.7V ~ 5.5V
- Features：-
- Tolerance：±20%
- Temperature Coefficient (Typ)：45ppm/°C
- Mounting Type：Surface Mount
- Supplier Device Package：20-QFN (3x4)
- Package / Case：20-VFQFN Exposed Pad
- Operating Temperature：-40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ)：70
Digital Potentiometers datasheet and documents for ISL23445TFRZ
Digital Potentiometers Overview
The ISL23445TFRZ is a volatile, low voltage, quad digitally controlled potentiometer (DCP) featuring an SPI interface. It integrates four DCP cores with 256 taps each on a monolithic CMOS IC. The T suffix indicates a total resistance of 100 kΩ. Analog supply VCC ranges from 1.7V to 5.5V, while the logic supply VLOGIC operates from 1.2V to 5.5V. Standby current is 3µA at 5V and 1.5µA at 1.7V. Wiper resistance is typically 70Ω at 3.3V. Power-on preset positions wipers at mid-scale (128 tap).
Digital Potentiometers Feature Summary
- Quad configuration with 256 resistor taps per channel.
- SPI serial interface supporting daisy-chaining without level shifters.
- Shutdown mode forces end-to-end open circuit for power reduction.
- Power-on reset to mid-scale position.
Digital Potentiometers Applications
- Power supply margining
- Trimming sensor circuits
- Gain adjustment in battery powered instruments
- RF power amplifier bias compensation
Digital Potentiometers Procurement Notes
Verify component authenticity through authorized channels. Confirm package integrity upon receipt. Check datasheet specifications against system requirements before integration. Ensure proper handling procedures are followed during assembly.
Digital Potentiometers Selection Notes
Select based on required resistance value; 'T' denotes 100kΩ. Verify voltage compatibility between VCC and VLOGIC domains. Consider thermal performance in QFN packaging. Evaluate standby current needs for battery applications.
Digital Potentiometers Part Context
This component belongs to the ISL234xx series of low voltage digital potentiometers. It serves as a direct replacement for older designs, specifically superseding the ISL23445 in recommended design practices.
Digital Potentiometers Replacement Considerations
The ISL23425 is the recommended replacement part for new designs.
Digital Potentiometers FAQ
What is the default wiper position upon power-up?
The wipers automatically reset to the mid-scale position, corresponding to 128 decimal or 80 hex.
How does the shutdown mode function?
It forces the DCP into an end-to-end open circuit and internally connects the wiper (RWi) to the low terminal (RLi) via a 2kΩ resistor.
Can the SDO pin be configured differently?
Yes, the Access Control Register allows configuring the SDO pin as either Push-Pull (default) or Open Drain output.
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