My Inquiry
My Account
Renesas ISL23425TFVZ-T7A
- Part No.:
- ISL23425TFVZ-T7A
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ISL23425TFVZ-T7A.pdf
- Description:
- IC DGT POT 100KOHM 256TP 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,288
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL23425TFVZ-T7A from Renesas Electronics (formerly Intersil) is a dual, volatile, 256-tap digitally controlled potentiometer with SPI interface, 100kΩ total resistance per channel, 1.7V–5.5V analog supply (VCC), and independent 1.2V–5.5V logic supply (VLOGIC). It operates across –40°C to +125°C and is used for precision gain/offset trimming in battery-powered instrumentation and RF bias control.
For engineers reviewing the ISL23425TFVZ-T7A datasheet, ISL23425TFVZ-T7A pinout, ISL23425TFVZ-T7A application, or ISL23425TFVZ-T7A equivalent, key selection criteria include dual-channel monotonicity (±0.15 LSB INL), wiper settling time (300 ns), shutdown mode behavior, µTQFN-16 package compatibility, and VLOGIC-level independence for mixed-voltage system integration.
Technical Context
The ISL23425TFVZ-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 256 resistor taps, ensuring glitch-free transitions during tap changes.
It features dual power domains: VCC powers analog DCP circuitry (1.7V–5.5V), while VLOGIC supplies digital logic and level translation (1.2V–5.5V), enabling direct interfacing with low-voltage microcontrollers without external level shifters. Shutdown mode forces end-to-end open-circuit and internally connects RWi to RLi via 2kΩ resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Resistance | 100kΩ per channel - sets full-scale voltage divider range and current-handling capability in sensor bias or amplifier feedback paths. |
| Resolution | 256 taps (8-bit) - provides 0.39% step resolution for fine-grained analog tuning in closed-loop systems. |
| VLOGIC Range | 1.2V to 5.5V - enables native SPI communication with 1.2V/1.8V/3.3V/5V controllers without level-shifting circuitry. |
| Wiper Settling Time | 300 ns (large-signal) - ensures fast response in dynamic calibration loops and real-time compensation circuits. |
| INL (Voltage Divider) | ±0.15 LSB (typ.) - guarantees monotonic output and predictable linearity for precision reference scaling applications. |
| Shutdown Current | 1.2 µA (VCC), 0.5 µA (VLOGIC) at 1.7V/1.2V - minimizes quiescent drain in always-on battery systems during idle periods. |
| Operating Temp | –40°C to +125°C - supports deployment in under-hood automotive, industrial motor drives, and outdoor telecom equipment. |
Pinout & Package
ISL23425TFVZ-T7A is housed in a 16-lead 2.6 mm × 1.8 mm µTQFN package (Pb-free, RoHS compliant) with exposed thermal pad. Pin numbering follows top-view orientation as defined in FN7873 Rev 1.00, Page 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 5, 6, 15) | Ground reference | Four dedicated ground connections reduce impedance and improve noise immunity for both analog and digital sections. |
| VLOGIC (Pin 2) | Digital supply input | Independent logic rail enabling 1.2V SPI operation; decoupling required near this pin for stable clock/data integrity. |
| SDO (Pin 3) | SPI data output | Configurable Push-Pull or Open-Drain; default Push-Pull eliminates need for external pull-up in most host interfaces. |
| SCK (Pin 4) | SPI clock input | Accepts up to 5 MHz (≥1.7V) or 1 MHz (1.2–1.6V); timing margins require tSU/tH ≥50 ns for reliable sampling. |
| SDI (Pin 5) | SPI data input | Receives instruction and data bytes on rising SCK edge; supports daisy-chaining multiple DCPs on shared bus. |
| CS (Pin 6) | Chip select (active-low) | Enables device and initiates SPI transaction; must go LOW before first SCK edge and HIGH to terminate. |
| RL1 (Pin 7) | DCP1 low terminal | Fixed end of second potentiometer array; connects to ground or signal return in rheostat/voltage divider configurations. |
| RW1 (Pin 8) | DCP1 wiper terminal | Movable contact point; output node for adjustable voltage division or variable resistance between RL1/RH1. |
| RH1 (Pin 9) | DCP1 high terminal | Fixed end of second potentiometer array; connects to VCC or reference voltage in standard use cases. |
| RH0 (Pin 10) | DCP0 high terminal | Fixed end of first potentiometer array; electrically isolated from RH1 but shares same VCC domain. |
| RW0 (Pin 11) | DCP0 wiper terminal | Primary analog output for channel 0; settles within 300 ns after register update for responsive system tuning. |
| RL0 (Pin 12) | DCP0 low terminal | Signal return path for channel 0; matched to RL1 for dual-channel tracking in differential applications. |
| VCC (Pin 13) | Analog supply input | Powers resistor arrays and wiper switches; must be ≥VLOGIC and ≤5.5V; bypassing critical for low-noise performance. |
| SDO (Pin 14) | SPI data output (redundant) | Second SDO pin supports bidirectional bus sharing or diagnostic readback in multi-device systems. |
| NC (Pin 16) | No connect | Internally unconnected; must remain floating or tied to GND per layout guidelines to avoid parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 256-tap DCPs | Enables simultaneous adjustment of two independent analog paths-e.g., dual-channel sensor conditioning or stereo audio gain control-without inter-channel crosstalk. |
| VLOGIC-independent SPI | Allows direct connection to 1.2V FPGA I/O banks or ultra-low-power MCUs, eliminating level translators and reducing BOM count and board area. |
| Power-on mid-scale preset | Wipers initialize to tap 128 (0x80) at startup, preventing undefined output states and ensuring safe default biasing in power supply margining circuits. |
| Shutdown mode | Forces open-circuit between RH/RL and shorts RW to RL via 2kΩ, isolating DCPs from signal path and cutting supply current to sub-µA levels. |
| Extended temperature range | Validated operation from –40°C to +125°C enables use in engine control units, industrial PLCs, and base station RF front-ends without derating. |
Applications
| Power Supply Margining | RF Power Amplifier Bias Compensation |
|---|---|
Use Scenario: Adjusting reference voltages in DC-DC converter feedback networks to validate stability margins under load transients and temperature extremes. IC Role / Device Role / Timing Role: Dual-channel ISL23425TFVZ-T7A acts as programmable voltage divider for VREF injection and output voltage offset tuning. Use Value: Enables automated margin testing across production lots using SPI commands-no manual trimmer replacement or soldering required. | Use Scenario: Dynamically compensating for temperature-induced drift in GaN HEMT gate bias networks to maintain optimal POUT and efficiency. IC Role / Device Role / Timing Role: ISL23425TFVZ-T7A serves as digitally tuned series resistor in gate bias chain, adjusting current setpoint in real time. Use Value: Achieves ±0.15 LSB INL and <300 ns settling to support closed-loop thermal compensation at >1 kHz update rates. |
| Trimming Sensor Circuits | Gain Adjustment in Battery-Powered Instruments |
Use Scenario: Calibrating offset and span errors in bridge-based pressure or temperature sensors during factory test and field recalibration. IC Role / Device Role / Timing Role: ISL23425TFVZ-T7A functions as precision rheostat in Wheatstone bridge completion or op-amp feedback loop. Use Value: 100kΩ resistance and 70Ω typical wiper resistance minimize loading effects on high-impedance sensor outputs. | Use Scenario: Optimizing gain in portable medical devices (e.g., ECG front-ends) where battery life and signal fidelity are co-constrained. IC Role / Device Role / Timing Role: ISL23425TFVZ-T7A configures programmable gain in instrumentation amplifier feedback network. Use Value: 1.2V–5.5V VLOGIC support allows direct SPI control from 1.8V MCU, while 4µA standby current extends runtime in sleep modes. |
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, TSSOP-16; no VLOGIC independence or shutdown mode. | Lacks dual-channel capability and low-voltage SPI flexibility; requires level shifting below 1.8V. | Choose when I²C bus is preferred and single-channel adjustment suffices; verify layout compatibility with µTQFN footprint. |
| MCP42050-I/SL | Dual 256-tap, SPI interface, 50kΩ, SOIC-14; VDD only (no separate VLOGIC), max temp +85°C. | Lower temperature rating and fixed 50kΩ resistance limit use in high-temp or high-resistance bias networks. | Select for cost-sensitive industrial controls operating ≤85°C where 50kΩ matches existing design constraints. |
Compared with AD5242BRUZ100 and MCP42050-I/SL, the ISL23425TFVZ-T7A uniquely delivers dual 100kΩ channels, 1.2V SPI compatibility, and extended temperature operation-making it optimal for compact, battery-aware, high-reliability analog tuning in automotive and industrial edge nodes.
Availability
ISL23425TFVZ-T7A is available at Aetrix Electronics and suitable for power supply margining, RF amplifier biasing, sensor trimming, and portable instrument gain control requiring stable component supply across extended temperature ranges and low-voltage logic ecosystems.
Supply support for ISL23425TFVZ-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 is a global semiconductor leader delivering trusted embedded design innovation through high-performance, mixed-signal solutions for automotive, industrial, infrastructure, and IoT markets.
The ISL23425TFVZ-T7A belongs to Renesas' XDCP™ (eXternally Digitally Controlled Potentiometer) product line, engineered for precision analog tuning in space-constrained, low-power, and thermally demanding applications where mechanical potentiometers fail.
FAQ
What is the default wiper position of the ISL23425TFVZ-T7A at power-up?
At power-up, both wiper registers (WR0 and WR1) of the ISL23425TFVZ-T7A reset to 0x80 (128 decimal), positioning each wiper at mid-scale-exactly halfway between RL and RH terminals. This behavior is guaranteed across the full –40°C to +125°C operating range and ensures a known, safe default state for voltage divider or rheostat configurations without requiring initialization firmware.
Does the ISL23425TFVZ-T7A support daisy-chaining via SPI?
Yes, the ISL23425TFVZ-T7A supports daisy-chaining: its SDO pin can drive the SDI pin of a downstream device, allowing multiple ISL23425TFVZ-T7A units (or compatible DCPs) to share a single SPI bus. The device operates in SPI Mode 0 (CPOL = 0, CPHA = 0), with data clocked in on the rising edge of SCK and out on the falling edge. Chip select remains individual per device.
What is the maximum allowed wiper current for the ISL23425TFVZ-T7A?
The absolute maximum wiper current for the ISL23425TFVZ-T7A is ±6mA for short durations (≤10 seconds), but the recommended operating limit is ±3mA continuous. Exceeding ±3mA risks increased wiper resistance drift and long-term reliability degradation. For 100kΩ configuration at 3.3V, this corresponds to a minimum effective load resistance of ~1.1kΩ across RW–RL or RW–RH.
Can the ISL23425TFVZ-T7A operate with VLOGIC = 1.2V and VCC = 5.5V simultaneously?
Yes, the ISL23425TFVZ-T7A is explicitly designed for independent VLOGIC and VCC rails: VLOGIC may be as low as 1.2V while VCC operates up to 5.5V. This separation enables direct interfacing with 1.2V logic families (e.g., advanced SoCs) while powering high-voltage analog signal chains-eliminating level shifters and simplifying mixed-supply system architecture.
Is the ISL23425TFVZ-T7A pin-compatible with other variants in the ISL23425 family?
Yes, all ISL23425 variants-including ISL23425TFRUZ-T7A, ISL23425TFRUZ-TK, and ISL23425TFVZ-T7A-share identical 16-lead µTQFN pinouts and electrical pin functions. Differences are limited to resistance value (10kΩ/50kΩ/100kΩ), reel packaging (T7A = 250-unit tape, TK = 1k-unit tape), and Pb-free finish (e3 vs e4), with no impact on PCB layout or schematic symbol reuse.
ISL23425TFVZ-T7A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- 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:
- 14-TSSOP
- Operating Temperature:
- -40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ):
- 70
ISL23425TFVZ-T7A FAQ
1.How can I place an order for ISL23425TFVZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL23425TFVZ-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 ISL23425TFVZ-T7A reliable?
The price and inventory of ISL23425TFVZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL23425TFVZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL23425TFVZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL23425TFVZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL23425TFVZ-T7A?
ISL23425TFVZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL23425TFVZ-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 ISL23425TFVZ-T7A?
For technical support, including ISL23425TFVZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL23425TFVZ-T7A requirements.
6.How does Aetrix verify that ISL23425TFVZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL23425TFVZ-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 ISL23425TFVZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL23425TFVZ-T7A?
All ISL23425TFVZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL23425TFVZ-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 ISL23425TFVZ-T7A part is unused and in its original packaging.
Return procedure for ISL23425TFVZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL23425TFVZ-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…
