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Renesas ISL23325TFRUZ-T7A
- Part No.:
- ISL23325TFRUZ-T7A
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 16-UFQFN
- Datasheet:
-
ISL23325TFRUZ-T7A.pdf
- Description:
- IC DGTL POT 100KOHM 16UTQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,899
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Product details
Overview
ISL23325TFRUZ-T7A from Renesas Electronics (formerly Intersil) is a dual, volatile, 256-tap digitally controlled potentiometer with I²C interface, 100kΩ end-to-end resistance, 16-lead µTQFN package, and operation from -40°C to +125°C. It functions as two independent programmable resistive dividers or rheostats in precision analog trimming circuits.
For engineers reviewing the ISL23325TFRUZ-T7A datasheet, ISL23325TFRUZ-T7A pinout, ISL23325TFRUZ-T7A application, or ISL23325TFRUZ-T7A equivalent, key selection criteria include its 100kΩ resistance tolerance (±2%), wiper resistance (70Ω typ), shutdown mode behavior, VLOGIC support down to 1.2V, and dual-channel monotonicity (DNL ±0.15 LSB).
Technical Context
The ISL23325TFRUZ-T7A integrates two independent DCP cores with volatile wiper registers (WR0/WR1), each controllable via I²C with three address pins (A0–A2) enabling up to eight devices on one bus. Its make-before-break switching ensures glitch-free wiper transitions.
It features separate analog (VCC = 1.7V–5.5V) and logic (VLOGIC = 1.2V–5.5V) supplies, allowing direct interfacing with low-voltage microcontrollers without level shifters. Shutdown mode forces open-circuit end-to-end resistance and connects RW to RL internally via a 2kΩ resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Resistance | 100kΩ ±2% - defines full-scale voltage division range and sets current limits in bias networks |
| Wiper Resistance | 70Ω typical @ VCC = 3.3V - impacts signal integrity and loading in high-impedance feedback paths |
| Integral Non-linearity | ±0.15 LSB (U/T options) - ensures accurate tap-to-voltage mapping for closed-loop calibration |
| Supply Current (Standby) | 1.2µA @ VCC = 1.7V, VLOGIC = 1.2V - enables ultra-low-power operation in battery-backed systems |
| Temperature Range | -40°C to +125°C - supports automotive under-hood and industrial motor-control environments |
| I²C Address Pins | A0, A1, A2 - allow hardware-selectable slave addresses for multi-device bus configurations |
| Shutdown Mode | End-to-end open circuit + RW–RL connection via 2kΩ - isolates DCP from circuit while preserving register state |
Pinout & Package
ISL23325TFRUZ-T7A uses a 16-lead 2.6mm × 1.8mm µTQFN package (RoHS-compliant, e4 NiPdAu termination), optimized for space-constrained PCB layouts and high thermal performance (θJC = 64°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Common return path for analog and digital sections; must be low-impedance for noise immunity |
| VLOGIC | I²C logic supply | Enables 1.2V–5.5V bus compatibility; decoupling required near pin for stable communication |
| SDA | I²C bidirectional data | Open-drain output requiring external pull-up; shares bus with other I²C slaves |
| SCL | I²C clock input | Master-generated clock; timing parameters defined per I²C Fast-mode spec (400kHz max) |
| A0–A2 | Slave address inputs | Hardwired to VLOGIC or GND to configure unique 7-bit I²C address (up to 8 devices) |
| RH0, RL0, RW0 | DCP0 high/low/wiper | Form first 3-terminal potentiometer or 2-terminal rheostat; RH0/RW0 used for gain control |
| RH1, RL1, RW1 | DCP1 high/low/wiper | Independent second channel; enables dual-parameter adjustment (e.g., offset + gain) |
| VCC | Analog power supply | Supplies DCP array; must remain within 1.7V–5.5V and ramp after VLOGIC during power-up |
Key Features
| Feature | Design Value |
|---|---|
| Dual 256-tap DCPs | Enables simultaneous trimming of two analog signals (e.g., differential amplifier offset and gain) |
| Volatile wiper registers | WR0/WR1 reset to 128 (mid-scale) at power-on, ensuring known startup state without EEPROM overhead |
| Independent VLOGIC supply | Eliminates need for external level shifters when interfacing with 1.2V/1.8V MCUs |
| Shutdown mode | Reduces system power by disconnecting DCP resistance network while retaining wiper position in register |
| Monotonic DNL | Guaranteed ±0.15 LSB ensures no code-dependent gain errors in closed-loop control loops |
Applications
| Power Supply Margining | Sensor Circuit Trimming |
|---|---|
Use Scenario: Adjusting reference voltage thresholds in DC-DC converter feedback networks to validate stability margins across voltage/temp corners. IC Role / Device Role / Timing Role: Dual DCP provides independent fine/coarse adjustment of upper and lower margining voltages. Use Value: Enables automated production testing with programmable ±3% margining without manual potentiometer replacement. | Use Scenario: Calibrating zero-point and span of bridge-based pressure sensors in industrial transmitters. IC Role / Device Role / Timing Role: ISL23325TFRUZ-T7A acts as precision voltage divider in sensor excitation path and offset nulling path. Use Value: Achieves <±0.1% full-scale calibration accuracy over -40°C to +125°C using factory-programmed I²C values. |
| RF Power Amplifier Bias | Battery-Powered Instrument Gain Control |
Use Scenario: Dynamically compensating temperature-induced drift in GaN FET gate bias networks. IC Role / Device Role / Timing Role: ISL23325TFRUZ-T7A configures adjustable current source for gate voltage setting in Class AB amplifiers. Use Value: Maintains constant output power across ambient temperatures using lookup-table-driven wiper updates. | Use Scenario: Setting programmable gain in handheld multimeter front-end amplifiers with auto-ranging capability. IC Role / Device Role / Timing Role: Dual-channel configuration allows independent scaling of AC and DC measurement paths. Use Value: Reduces BOM count by replacing two discrete trimmers while supporting firmware-based calibration updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digitally controlled potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5175BRMZ-100 | Non-volatile EEPROM storage; 256-tap; 100kΩ; SPI interface; higher wiper resistance (120Ω) | Requires no host initialization at power-up; unsuitable for high-write-cycle dynamic adjustment | Select when persistent wiper settings are mandatory and SPI is preferred over I²C |
| MCP45HV51-103E/MS | High-voltage operation (up to 36V); 256-tap; 10kΩ; I²C; no VLOGIC pin (single supply) | Supports higher DCP terminal voltages but lacks 1.2V logic compatibility and dual-channel matching specs | Select for >12V analog rails where ISL23325TFRUZ-T7A's 5.5V VCC limit is insufficient |
Compared with AD5175BRMZ-100 and MCP45HV51-103E/MS, the ISL23325TFRUZ-T7A offers superior low-voltage logic interoperability (1.2V VLOGIC), tighter DCP-to-DCP matching (±0.5 LSB), and lower standby current (1.2µA), making it optimal for battery-powered, thermally demanding, or multi-device I²C systems.
Availability
ISL23325TFRUZ-T7A is available at Aetrix Electronics and suitable for power supply margining, sensor trimming, RF bias compensation, and battery-powered instrument gain control requiring stable component supply across extended temperature ranges.
Supply support for ISL23325TFRUZ-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 acquired Intersil in 2017 and maintains its precision analog portfolio, emphasizing high-reliability, extended-temperature ICs for industrial and automotive markets.
The ISL23325TFRUZ-T7A belongs to Renesas' XDCP™ (eXternally Digitally Controlled Potentiometer) family, designed specifically for replacing mechanical potentiometers in automated calibration, adaptive biasing, and closed-loop analog tuning applications.
FAQ
What is the resistance tolerance and temperature coefficient of the ISL23325TFRUZ-T7A?
The ISL23325TFRUZ-T7A has a total resistance tolerance of ±2% and an end-to-end temperature coefficient of 45 ppm/°C (T-option, 100kΩ). This ensures predictable resistance drift over -40°C to +125°C, critical for stable gain-setting networks in automotive and industrial environments. The ratiometric temperature coefficient is 2.3 ppm/°C at mid-scale, minimizing voltage-divider ratio drift.
Does the ISL23325TFRUZ-T7A retain wiper position after power cycling?
No - the ISL23325TFRUZ-T7A uses volatile wiper registers. Upon power-up, both WR0 and WR1 reset to 128 (mid-scale), positioning each wiper at the center of its 256-tap range. To maintain custom settings across cycles, the host MCU must reprogram the registers via I²C after initialization. This eliminates EEPROM wear-out concerns but requires firmware coordination.
Can the ISL23325TFRUZ-T7A operate with different VCC and VLOGIC supply voltages?
Yes - the ISL23325TFRUZ-T7A supports independent supplies: VCC from 1.7V to 5.5V for the analog DCP array, and VLOGIC from 1.2V to 5.5V for the I²C interface. This allows direct connection to 1.2V or 1.8V microcontrollers without level shifters, while powering the DCP section from a higher 3.3V or 5V rail for improved SNR in voltage-divider applications.
What happens to the DCP terminals during shutdown mode of the ISL23325TFRUZ-T7A?
In shutdown mode (SHDN bit = 0 in ACR), the ISL23325TFRUZ-T7A forces an open circuit between RH and RL terminals for both DCPs, while internally connecting each RW to its corresponding RL through a 2kΩ resistor. This isolates the DCP resistance network from the circuit, reducing leakage and power consumption, while preserving wiper register contents for fast recovery.
How many devices can share the same I²C bus with the ISL23325TFRUZ-T7A?
Up to eight ISL23325TFRUZ-T7A devices can share a single I²C bus, enabled by three hardware-configurable address pins (A0, A1, A2). Each pin can be tied to VLOGIC or GND, generating a unique 3-bit address extension to the base 7-bit slave address. No software address reconfiguration is needed - addressing is fixed at board layout.
ISL23325TFRUZ-T7A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 16-UFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 2
- Number of Taps:
- 256
- Resistance (Ohms):
- 100k
- Interface:
- I2C
- Memory Type:
- Volatile
- Voltage - Supply:
- 1.2V ~ 5.5V, 1.7V ~ 5.5V
- Features:
- Selectable Address
- 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
ISL23325TFRUZ-T7A FAQ
1.How can I place an order for ISL23325TFRUZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL23325TFRUZ-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 ISL23325TFRUZ-T7A reliable?
The price and inventory of ISL23325TFRUZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL23325TFRUZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL23325TFRUZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL23325TFRUZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL23325TFRUZ-T7A?
ISL23325TFRUZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL23325TFRUZ-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 ISL23325TFRUZ-T7A?
For technical support, including ISL23325TFRUZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL23325TFRUZ-T7A requirements.
6.How does Aetrix verify that ISL23325TFRUZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL23325TFRUZ-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 ISL23325TFRUZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL23325TFRUZ-T7A?
All ISL23325TFRUZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL23325TFRUZ-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 ISL23325TFRUZ-T7A part is unused and in its original packaging.
Return procedure for ISL23325TFRUZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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