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Renesas ISL23315WFUZ
- Part No.:
- ISL23315WFUZ
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ISL23315WFUZ.pdf
- Description:
- IC DGTL POT 10KOHM 256TAP 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,808
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Product details
Overview
ISL23315WFUZ from Renesas Electronics (formerly Intersil) is a volatile, low-voltage, 256-tap digitally controlled potentiometer (DCP) with I²C interface, 10kΩ end-to-end resistance, ±0.5 LSB integral nonlinearity, and operation from 1.7V to 5.5V VCC and 1.2V to 5.5V VLOGIC. It serves as a precision voltage divider or rheostat in analog signal conditioning circuits for power supply margining and bias compensation.
For engineers reviewing the ISL23315WFUZ datasheet, ISL23315WFUZ pinout, ISL23315WFUZ application, or ISL23315WFUZ equivalent, key selection criteria include its 10kΩ resistance option, 10-lead MSOP package, mid-scale power-on default, shutdown mode with RW–RL short, and independent VLOGIC rail supporting direct 1.2V bus interfacing without level shifters.
Technical Context
The ISL23315WFUZ implements a monolithic CMOS resistor ladder with CMOS wiper switches operating in make-before-break mode, controlled via an 8-bit volatile Wiper Register (WR) accessible over I²C. Its architecture supports both three-terminal potentiometer and two-terminal rheostat configurations with full 0–VCC terminal voltage range.
It features dual-supply operation: VCC powers the analog DCP core (1.7V–5.5V), while VLOGIC independently powers the I²C interface (1.2V–5.5V), enabling interoperability with low-voltage microcontrollers. Shutdown mode forces RH–RL open-circuit and internally connects RW to RL through ~2kΩ, preserving WR contents.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Resistance | 10kΩ - defines maximum end-to-end resistance and sets current limits in rheostat mode (e.g., ±3mA max wiper current). |
| Wiper Resolution | 256 taps (8-bit) - enables 0.39% incremental adjustment resolution across full scale (128 steps per half-scale). |
| INL (Voltage Divider) | ±0.5 LSB - ensures monotonic output and <0.2% full-scale error in precision voltage division applications like VREF trimming. |
| VLOGIC Range | 1.2V to 5.5V - allows direct connection to 1.2V/1.8V/3.3V/5V logic buses without external level shifters. |
| Operating Temp | −40°C to +125°C - qualified for under-hood automotive, industrial power supplies, and base station RF bias circuits. |
| Shutdown Current | <2.8µA max - reduces system standby power in battery-operated equipment when DCP is inactive. |
| Wiper Settling Time | 0.4µs - enables fast reconfiguration during dynamic calibration sequences without introducing timing bottlenecks. |
Pinout & Package
ISL23315WFUZ is packaged in a Pb-free, RoHS-compliant 10-lead MSOP (M10.118) with 0.5mm pitch and exposed pad thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VLOGIC (Pin 1) | I²C logic supply input | Decouples bus voltage from analog VCC; enables 1.2V I²C compatibility and eliminates need for external level translation. |
| SCL (Pin 2) | I²C clock input | Open-drain input requiring external pull-up; supports standard/fast-mode I²C up to 400kHz. |
| SDA (Pin 3) | I²C bidirectional data | Open-drain I/O; transmits ACK/NACK and transfers WR/ACR register data with 9-bit protocol framing. |
| A0 (Pin 4) | Slave address LSB | Hardwired to VLOGIC or GND to set bit-0 of 7-bit I²C address; enables up to four devices on same bus. |
| A1 (Pin 5) | Slave address MSB | Hardwired to VLOGIC or GND to set bit-1 of 7-bit I²C address; used with A0 for device addressing. |
| RL (Pin 6) | DCP low terminal | Fixed end of resistor ladder; referenced to GND in voltage divider mode; forms one end of variable resistance in rheostat mode. |
| RW (Pin 7) | Wiper terminal | Movable contact position controlled by WR register; delivers adjustable voltage or resistance; shorted to RL in shutdown mode. |
| RH (Pin 8) | DCP high terminal | Fixed end of resistor ladder; connected to VCC in voltage divider mode; second end in rheostat configuration. |
| VCC (Pin 9) | Analog supply input | Powers DCP core and internal logic; must be ≥1.7V; sets upper limit for DCP terminal voltage (0–VCC). |
| GND (Pin 10) | Analog ground reference | Common return for VCC, RL, and RH; separate from digital ground unless co-located per layout best practices. |
Key Features
| Feature | Design Value |
|---|---|
| Volatile Wiper Register (WR) | 8-bit register directly readable/writable via I²C; retains last setting through shutdown but resets to 128 (mid-scale) on power-up. |
| Independent VLOGIC rail | Enables 1.2V I²C bus operation while VCC runs at 3.3V or 5V - critical for mixed-supply systems with ultra-low-voltage controllers. |
| Shutdown Mode | Activates via ACR[6]; opens RH–RL path and shorts RW to RL (~2kΩ), eliminating leakage paths while preserving WR state. |
| Low wiper resistance | 70Ω typical at 3.3V - minimizes insertion loss and voltage drop in signal-path rheostat applications (e.g., laser diode bias). |
| High temp grade | Rated for −40°C to +125°C - validated for use in automotive powertrain modules, industrial DC-DC converters, and telecom RF stages. |
Applications
| Power Supply Margining | RF Power Amplifier Bias |
|---|---|
|
Use Scenario: Adjusting feedback voltage of DC-DC converters during production test to validate regulation tolerance under load and temperature variation. IC Role / Device Role / Timing Role: Precision voltage divider setting reference point for error amplifier; replaces mechanical trimpot with programmable, repeatable, non-volatile-alternative control. Use Value: Enables automated margin testing via I²C commands; eliminates manual calibration; supports 0.5 LSB INL for ±0.2% output accuracy. |
Use Scenario: Dynamically tuning gate bias voltage of GaAs FETs in cellular base station PA stages to maintain linearity and efficiency across temperature drift. IC Role / Device Role / Timing Role: Rheostat-mode current source control element; adjusts bias current in real time based on temperature or PA output power feedback. Use Value: 0.4µs wiper settling time allows rapid recalibration; 10kΩ value matches typical PA bias impedance; 125°C rating suits outdoor enclosures. |
| LCD Panel VCOM Adjustment | Laser Diode Bias Compensation |
|
Use Scenario: Fine-tuning common-mode voltage (VCOM) on TFT-LCD source drivers to minimize image flicker and improve grayscale uniformity across panel lifetime. IC Role / Device Role / Timing Role: High-precision voltage divider generating stable VCOM reference; operated in factory calibration and field service modes. Use Value: 10kΩ resistance and ±0.5 LSB INL ensure sub-mV VCOM stability; VLOGIC=1.8V support integrates cleanly with display controller I²C buses. |
Use Scenario: Compensating threshold current drift of edge-emitting laser diodes in optical transceivers due to aging and ambient temperature changes. IC Role / Device Role / Timing Role: Two-terminal variable resistor in constant-current bias network; adjusts series resistance to maintain target optical output power. Use Value: 70Ω typical wiper resistance minimizes thermal noise injection; shutdown mode isolates bias path during sleep states; 125°C rating matches SFP+ module thermal envelope. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digitally controlled potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5170BRMZ-10 | Nonvolatile EEPROM storage; 10kΩ; SPI interface; 10-lead MSOP; higher 45ppm/°C tempco. | Requires no host initialization at power-up; suited for systems needing retained settings after power cycle. | Select ISL23315WFUZ when volatile operation, faster 0.4µs settling, or I²C bus compatibility is required; choose AD5170BRMZ-10 only if nonvolatility is mandatory. |
| MCP4017T-103I/OT | Volatile; 10kΩ; I²C interface; SOT-23-6 package; 128-tap resolution; no VLOGIC independence (VDD powers logic and analog). | Smaller footprint but limited to 1.8–5.5V single supply; lacks 1.2V bus support and mid-scale power-on default. | Choose ISL23315WFUZ for 1.2V I²C compatibility, guaranteed mid-scale startup, and lower tempco (175ppm/°C vs 500ppm/°C); use MCP4017T-103I/OT only for space-constrained designs accepting reduced specs. |
Compared with AD5170BRMZ-10 and MCP4017T-103I/OT, ISL23315WFUZ uniquely combines 1.2V I²C operation, 0.4µs wiper response, and guaranteed 128-tap power-on state - making it optimal for fast-reconfiguring, low-voltage embedded systems where EEPROM wear-out or layout constraints preclude alternatives.
Availability
ISL23315WFUZ is available at Aetrix Electronics and suitable for power supply margining, RF amplifier biasing, LCD VCOM tuning, and laser diode compensation requiring stable component supply across automotive, industrial, and telecom design cycles.
Supply support for ISL23315WFUZ 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 legacy product lines including precision analog ICs. The company specializes in high-reliability, extended-temperature semiconductor solutions for industrial and automotive markets.
The ISL23315WFUZ belongs to Renesas' XDCP™ (eXternally Digitally Controlled Potentiometer) family, designed specifically for replacing mechanical potentiometers in automated calibration, adaptive biasing, and closed-loop analog control systems.
FAQ
What is the total resistance value of the ISL23315WFUZ?
The ISL23315WFUZ has a nominal end-to-end resistance of 10kΩ, as indicated by the "W" suffix in the part number per the ordering table. This value is specified with ±20% tolerance and exhibits a 175ppm/°C end-to-end temperature coefficient across −40°C to +125°C.
Does the ISL23315WFUZ retain its wiper setting after power cycling?
No, the ISL23315WFUZ is a volatile DCP: its 8-bit Wiper Register (WR) resets to 128 (mid-scale) on every power-up. To retain settings across cycles, external microcontroller firmware must reprogram the WR after initialization - unlike nonvolatile alternatives such as the AD5170.
Can the ISL23315WFUZ operate with a 1.2V I²C bus while VCC is at 3.3V?
Yes - the ISL23315WFUZ features a dedicated VLOGIC pin that accepts 1.2V to 5.5V, fully decoupled from VCC (1.7V–5.5V). This allows direct connection to 1.2V I²C masters without level shifters, while the DCP core operates at higher analog supply voltages for improved SNR and drive capability.
What happens to the terminals during shutdown mode of the ISL23315WFUZ?
In shutdown mode (activated by setting SHDN bit in ACR), the ISL23315WFUZ opens the RH–RL path and internally connects RW to RL through a ~2kΩ resistor. This isolates the high-side terminal while providing a defined low-impedance path at the wiper - preventing floating nodes and reducing system leakage current to <2.8µA.
Is the ISL23315WFUZ pin-compatible with other variants in the ISL23315 family?
Yes - all ISL23315 variants (e.g., ISL23315TFUZ, ISL23315UFUZ) share identical 10-lead MSOP pinout and function mapping. Resistance value (10kΩ/50kΩ/100kΩ) and temperature coefficient differ by variant, but electrical interface, register structure, and timing remain consistent across the family.
ISL23315WFUZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 1
- Number of Taps:
- 256
- Resistance (Ohms):
- 10k
- Interface:
- I2C
- Memory Type:
- Volatile
- Voltage - Supply:
- 1.2V ~ 5.5V, 1.7V ~ 5.5V
- Features:
- Selectable Address
- Tolerance:
- ±20%
- Temperature Coefficient (Typ):
- 175ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 10-MSOP
- Operating Temperature:
- -40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ):
- 70
ISL23315WFUZ FAQ
1.How can I place an order for ISL23315WFUZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL23315WFUZ 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 ISL23315WFUZ reliable?
The price and inventory of ISL23315WFUZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL23315WFUZ is usually 5 days.
3.What payment methods are accepted for ISL23315WFUZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL23315WFUZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL23315WFUZ?
ISL23315WFUZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL23315WFUZ 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 ISL23315WFUZ?
For technical support, including ISL23315WFUZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL23315WFUZ requirements.
6.How does Aetrix verify that ISL23315WFUZ is sourced from the original manufacturer or authorized distributors?
All ISL23315WFUZ 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 ISL23315WFUZ meets industry standards.
7.What is the process for return or replacement of ISL23315WFUZ?
All ISL23315WFUZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL23315WFUZ, 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 ISL23315WFUZ part is unused and in its original packaging.
Return procedure for ISL23315WFUZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL23315WFUZ Tags
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