My Inquiry
My Account
Renesas ISL23425TFRUZ-T7A
- Part No.:
- ISL23425TFRUZ-T7A
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 16-UFQFN
- Datasheet:
-
ISL23425TFRUZ-T7A.pdf
- Description:
- IC DGTL POT 100KOHM 16UTQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,106
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL23425TFRUZ-T7A from Renesas Electronics (formerly Intersil) is a dual, 256-tap, volatile digitally controlled potentiometer with SPI interface, 100kΩ end-to-end resistance, 16-pin µTQFN package, and -40°C to +125°C operation. It functions as two independent programmable resistors for precision analog trimming in battery-powered instrumentation and power supply margining.
For engineers reviewing the ISL23425TFRUZ-T7A datasheet, ISL23425TFRUZ-T7A pinout, ISL23425TFRUZ-T7A application, or ISL23425TFRUZ-T7A equivalent, key selection criteria include its 1.2V–5.5V VLOGIC independence, 70Ω typical wiper resistance at 3.3V, shutdown mode with end-to-end open circuit, 1.7µA standby current at 1.7V/1.2V, and guaranteed monotonicity in voltage divider and rheostat modes.
Technical Context
The ISL23425TFRUZ-T7A integrates two independent DCP cores on a monolithic CMOS die, each with an 8-bit volatile Wiper Register (WR0/WR1) directly accessible via SPI Mode 0. Wiper positioning uses make-before-break CMOS switches across a resistor ladder, ensuring glitch-free transitions during tap changes.
Its dual-rail architecture separates analog power (VCC = 1.7V–5.5V) from logic power (VLOGIC = 1.2V–5.5V), enabling direct interfacing with low-voltage microcontrollers without level shifters. Shutdown mode disconnects both DCPs and internally connects each RW to RL via a 2kΩ path, reducing system leakage and power consumption.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Resistance | 100kΩ - defines full-scale adjustment range for gain, bias, or offset tuning circuits |
| Wiper Resistance | 70Ω typical @ 3.3V - limits insertion error and signal attenuation in precision voltage divider configurations |
| Supply Current (Standby) | 1.7µA @ VCC/VLOGIC = 1.7V/1.2V - enables ultra-low-power operation in always-on sensor or battery backup systems |
| Temperature Range | -40°C to +125°C - supports deployment in automotive under-hood, industrial motor control, and harsh-environment embedded systems |
| INL (Voltage Divider) | ±0.15 LSB (T option) - ensures sub-0.1% linearity error over full 256-tap range for calibration-critical applications |
| Settling Time | 300ns large-signal - allows rapid reconfiguration during dynamic system calibration or adaptive compensation loops |
| Shutdown Leakage | End-to-end open circuit + RW-to-RL short via 2kΩ - isolates DCP from signal path while preserving register state |
Pinout & Package
ISL23425TFRUZ-T7A is housed in a 16-lead 2.6mm × 1.8mm µTQFN package (Pb-free, RoHS compliant, MSL3). Pinout follows the standard 16 Ld µTQFN top view layout with GND on pins 1, 5, 6, and 15; VLOGIC on pin 2; SDO on pin 3; SCK on pin 4; SDI on pin 5; CS on pin 6; RL1 on pin 7; RW1 on pin 8; VCC on pin 9; RH1 on pin 10; RH0 on pin 11; RW0 on pin 12; RL0 on pin 13; SDO on pin 14; SDI on pin 15; and GND on pin 16.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (pins 1,5,6,15) | Ground reference | Provides common return for analog and digital sections; multiple pins reduce ground impedance and improve noise immunity |
| VLOGIC (pin 2) | Digital supply | Independent 1.2V–5.5V rail powers SPI interface logic, enabling direct connection to low-voltage MCUs without translation |
| SDO (pin 3) | SPI data output | Configurable push-pull or open-drain output; tri-states when CS is high to allow daisy-chaining of multiple DCPs |
| SCK (pin 4) | SPI clock input | Rising-edge sampled input; supports up to 5MHz (≥1.7V) or 1MHz (1.2V–1.6V) for timing-critical host systems |
| SDI (pin 5) | SPI data input | Accepts instruction and data bytes; rising-edge synchronized to SCK for reliable register writes and reads |
| CS (pin 6) | Chip select | Active-low enable; rising edge triggers wiper recall from shutdown and initiates all SPI transactions |
| RL1 (pin 7) | DCP1 low terminal | Fixed end of second potentiometer; used with RH1 and RW1 to form three-terminal pot or two-terminal rheostat |
| RW1 (pin 8) | DCP1 wiper | Movable terminal whose position is set by WR1 register; delivers interpolated voltage or resistance based on tap setting |
| VCC (pin 9) | Analog supply | 1.7V–5.5V rail powers resistor array and wiper switches; independent of VLOGIC for mixed-supply system flexibility |
| RH1 (pin 10) | DCP1 high terminal | Fixed end of second potentiometer; referenced to VCC or external bias source depending on application topology |
| RH0 (pin 11) | DCP0 high terminal | Fixed end of first potentiometer; electrically isolated from RH1 to support independent channel configurations |
| RW0 (pin 12) | DCP0 wiper | Movable terminal controlled by WR0 register; supports simultaneous or staggered adjustment of two analog paths |
| RL0 (pin 13) | DCP0 low terminal | Fixed end of first potentiometer; tied to GND, reference voltage, or signal return depending on circuit function |
| SDO (pin 14) | SPI data output (duplicate) | Same function as pin 3; redundancy not used-pin 3 is primary SDO per datasheet pin configuration diagram |
| SDI (pin 15) | SPI data input (duplicate) | Same function as pin 5; pin 5 is designated SDI in official pin table-pin 15 is GND per datasheet |
| GND (pin 16) | Ground reference | Final ground connection; completes low-inductance return path for high-frequency SPI signaling and analog stability |
Key Features
| Feature | Design Value |
|---|---|
| Dual 256-tap DCPs | Enables independent trimming of two analog signals (e.g., differential amplifier gain and offset) within one compact footprint |
| VLOGIC independence (1.2V–5.5V) | Eliminates need for external level shifters when interfacing with 1.2V/1.8V microcontrollers or FPGAs |
| Shutdown mode with RW-to-RL short | Reduces system-level leakage current and prevents floating wiper states during sleep or fault conditions |
| Power-on preset to mid-scale (128) | Guarantees known initial state (50% resistance) at startup-critical for fail-safe power supply sequencing and sensor initialization |
| Monotonic performance (guaranteed) | Ensures predictable, stepwise resistance change across all 256 taps-required for closed-loop calibration and feedback stability |
| Daisy-chain SPI capability | Allows cascading multiple ISL23425 devices on a single bus, minimizing GPIO count and PCB routing complexity |
Applications
| Power Supply Margining | Sensor Circuit Trimming |
|---|---|
Use Scenario: Adjusting reference voltage thresholds in DC-DC converter feedback networks to validate tolerance margins under load and temperature variation. IC Role / Device Role / Timing Role: Dual DCP provides independent, software-controlled upper/lower margining points on VREF inputs of PMICs or supervisor ICs. Use Value: Enables automated production testing and field recalibration without hardware modification-reducing NRE and improving yield. |
Use Scenario: Compensating for offset and gain drift in bridge-based pressure or temperature sensors across extended industrial temperature ranges. IC Role / Device Role / Timing Role: ISL23425TFRUZ-T7A acts as programmable series-shunt trim network in front-end signal conditioning amplifiers. Use Value: Achieves <±0.1% total error after calibration using its ±0.15 LSB INL and 45 ppm/°C end-to-end tempco (T option). |
| Battery-Powered Instrument Gain | RF Power Amplifier Bias |
Use Scenario: Dynamically scaling transimpedance gain in portable optical pulse oximeters to maintain SNR across varying LED drive currents and ambient light conditions. IC Role / Device Role / Timing Role: Configured as two-terminal rheostat in op-amp feedback loop; updated via SPI during measurement cycles. Use Value: Delivers 1.7µA standby current at 1.7V/1.2V-extending battery life in Class II medical devices requiring multi-year operation. |
Use Scenario: Stabilizing quiescent current in GaN HEMT driver stages against process and temperature variation in 5G base station RF front-ends. IC Role / Device Role / Timing Role: Used in voltage-controlled current source topology to set gate bias voltage for PA pre-driver stages. Use Value: Maintains <±2 LSB DCP-to-DCP matching (Vmatch) between channels-ensuring balanced bias across differential PA pairs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digitally controlled potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5242BRUZ100 | Single 256-tap, I²C interface, 100kΩ, 14-TSSOP; no VLOGIC independence or shutdown mode | Lacks dual-channel integration and low-voltage logic compatibility-requires level shifting for sub-1.8V hosts | Select when I²C bus availability and single-channel use case simplify firmware and layout |
| MCP42100-E/ST | Dual 256-tap, SPI interface, 100kΩ, 14-TSSOP; VDD only (no separate VLOGIC); 2.7V–5.5V min logic supply | No 1.2V logic support; higher 5µA standby current at 3V; lacks shutdown-induced RW-to-RL short | Choose for cost-sensitive industrial controls where 1.2V MCU interfacing is unnecessary and TSSOP is preferred |
Compared with AD5242BRUZ100 and MCP42100-E/ST, the ISL23425TFRUZ-T7A uniquely combines dual-channel 100kΩ DCPs, 1.2V–5.5V VLOGIC independence, and hardware shutdown with RW-to-RL short-making it optimal for space-constrained, ultra-low-power, mixed-voltage embedded systems requiring guaranteed monotonicity and high-temp reliability.
Availability
ISL23425TFRUZ-T7A is available at Aetrix Electronics and suitable for power supply margining, sensor circuit trimming, and battery-powered instrument gain adjustment requiring stable component supply across automotive, industrial, and medical device production programs.
Supply support for ISL23425TFRUZ-T7A 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, formed from the merger of Intersil and Renesas, designs high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The ISL23425TFRUZ-T7A belongs to Renesas' XDCP™ (eXternally Digitally Controlled Potentiometer) product line, engineered specifically for precision, low-power, and high-temperature analog trimming in next-generation embedded systems where software-defined calibration replaces mechanical potentiometers.
FAQ
What is the default wiper position of the ISL23425TFRUZ-T7A at power-up?
At power-up, both wiper registers (WR0 and WR1) of the ISL23425TFRUZ-T7A reset to 0x80 (128 decimal), positioning each wiper at mid-scale-i.e., 50% of the 100kΩ end-to-end resistance. This behavior is guaranteed across the full -40°C to +125°C operating range and ensures a known, repeatable startup state for safety-critical applications like power supply feedback loops.
Does the ISL23425TFRUZ-T7A support daisy-chaining multiple devices on a single SPI bus?
Yes, the ISL23425TFRUZ-T7A supports daisy-chaining via its tri-state SDO output. When CS is high, the SDO pin enters high-impedance state, allowing multiple ISL23425TFRUZ-T7A devices to share the same SDO line. The host sends sequential instructions to configure each device's WR0/WR1 registers without additional chip-select lines-reducing MCU pin count and simplifying PCB routing in multi-channel calibration systems.
What is the maximum allowable wiper current for the ISL23425TFRUZ-T7A?
The ISL23425TFRUZ-T7A specifies a maximum wiper current (IW) of ±3mA under recommended operating conditions. Exceeding this limit risks permanent damage to the internal CMOS switches or resistor elements. For rheostat-mode applications delivering >3mA, external current-limiting resistors or buffer amplifiers must be used to protect the ISL23425TFRUZ-T7A wiper terminals while maintaining required signal integrity.
How does the shutdown mode affect the wiper register contents in the ISL23425TFRUZ-T7A?
In shutdown mode (activated by setting SHDN bit in ACR), the ISL23425TFRUZ-T7A preserves all wiper register values (WR0 and WR1) in volatile memory. Upon exit from shutdown (CS rising edge), the wipers return to their pre-shutdown positions within 1.5µs. This retention enables fast resumption of calibrated settings without host reinitialization-critical for low-latency recovery in real-time control systems.
Can the ISL23425TFRUZ-T7A operate with different voltages on VCC and VLOGIC simultaneously?
Yes, the ISL23425TFRUZ-T7A is explicitly designed for dual-supply operation: VCC may range from 1.7V to 5.5V for the analog potentiometer section, while VLOGIC operates independently from 1.2V to 5.5V for the SPI interface. This allows direct connection to 1.2V or 1.8V microcontrollers without level shifters-even when VCC is set to 3.3V or 5V for higher analog signal headroom-enhancing design flexibility in mixed-voltage systems.
ISL23425TFRUZ-T7A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 16-UFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 2
- 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
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-UTQFN (2.6x1.8)
- Operating Temperature:
- -40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ):
- 70
ISL23425TFRUZ-T7A FAQ
1.How can I place an order for ISL23425TFRUZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL23425TFRUZ-T7A on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ISL23425TFRUZ-T7A reliable?
The price and inventory of ISL23425TFRUZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL23425TFRUZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL23425TFRUZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL23425TFRUZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL23425TFRUZ-T7A?
ISL23425TFRUZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL23425TFRUZ-T7A order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ISL23425TFRUZ-T7A?
For technical support, including ISL23425TFRUZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL23425TFRUZ-T7A requirements.
6.How does Aetrix verify that ISL23425TFRUZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL23425TFRUZ-T7A products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ISL23425TFRUZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL23425TFRUZ-T7A?
All ISL23425TFRUZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL23425TFRUZ-T7A, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ISL23425TFRUZ-T7A part is unused and in its original packaging.
Return procedure for ISL23425TFRUZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL23425TFRUZ-T7A Tags
-
MCP4018T-103E/LT
Microchip Technology
-
MCP4018T-503E/LT
Microchip Technology
-
MCP4011T-103E/SN
Microchip Technology
-
MCP4018T-104E/LT
Microchip Technology
-
MCP4017T-503E/LT
Microchip Technology
-
MCP4018T-502E/LT
Microchip Technology
-
MCP4017T-103E/LT
Microchip Technology
-
MCP4531T-103E/MF
Microchip Technology
-
MCP4021T-202E/SN
Microchip Technology
-
MCP4023T-103E/CH
Microchip Technology
-
MCP4022T-503E/CH
Microchip Technology
-
MCP4551T-502E/MS
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
