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Renesas ISL23415WFUZ-TK
- Part No.:
- ISL23415WFUZ-TK
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ISL23415WFUZ-TK.pdf
- Description:
- IC DGTL POT 10KOHM 256TAP 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,661
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Product details
Overview
ISL23415WFUZ-TK from Renesas Electronics is a volatile, low-voltage, SPI-controlled 10kΩ digitally controlled potentiometer (DCP) with 256 taps, 70Ω typical wiper resistance at 3.3V, 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 battery-powered instrumentation requiring mid-scale power-on reset and shutdown mode.
For engineers reviewing the ISL23415WFUZ-TK datasheet, ISL23415WFUZ-TK pinout, ISL23415WFUZ-TK application, or ISL23415WFUZ-TK equivalent, key selection considerations include its dual-supply SPI interface (VLOGIC independent of VCC), 10kΩ end-to-end resistance, -40°C to +125°C extended temperature range, and MSOP-10 package compatibility with space-constrained portable medical and RF bias circuits.
Technical Context
The ISL23415WFUZ-TK implements a monolithic CMOS resistor ladder with CMOS wiper switches and volatile 8-bit Wiper Register (WR), supporting make-before-break tap transitions and direct SPI read/write access. Its architecture enables precise digital control of analog signal paths without external level shifters due to dedicated VLOGIC pin.
It operates in voltage divider mode (RH–RW–RL) or rheostat mode (RW–RL or RW–RH), with guaranteed monotonicity, ±0.5 LSB integral non-linearity (W option), and 1200 kHz –3dB cutoff at mid-tap. Shutdown mode forces RH–RL open-circuit and internally shorts RW to RL via 2kΩ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Resistance | 10kΩ - defines full-scale voltage division ratio and current-handling capability in gain/offset adjustment circuits. |
| Wiper Resistance | 70Ω typical @ 3.3V - limits insertion loss and thermal noise in precision sensor biasing and calibration paths. |
| Supply Ranges | VCC = 1.7–5.5V, VLOGIC = 1.2–5.5V - enables direct interfacing with ultra-low-voltage MCUs (e.g., 1.2V I/O) while powering analog section from higher rails. |
| Tap Resolution | 256 taps (8-bit WR) - provides 0.39% step resolution for fine-grained parameter tuning in LCD bias or power margining. |
| Temperature Range | -40°C to +125°C - supports deployment in automotive under-hood, industrial motor drives, and portable medical equipment. |
| Shutdown Current | <2.8µA max - extends battery life in always-on portable instruments during idle periods without losing wiper position state. |
| Power-on Default | Wiper at 128 (mid-scale) - ensures predictable startup behavior in closed-loop systems requiring known initial gain or offset. |
Pinout & Package
ISL23415WFUZ-TK is packaged in a Pb-free, RoHS-compliant 10-lead MSOP (M10.118) with 0.5mm pitch and exposed pad for thermal performance. Pin numbering follows standard top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 9) | Analog power supply | Provides bias for DCP resistor array and wiper switches; must be ≥1.7V and ≤5.5V; sets maximum DCP terminal voltage range (0V to VCC). |
| GND (Pin 10) | Analog ground reference | Common return for RH, RL, RW, and internal analog circuitry; requires low-impedance connection to minimize noise coupling into wiper path. |
| RH (Pin 8) | DCP high terminal | Fixed end of resistor ladder; connects to highest potential node (e.g., VCC or reference voltage) in voltage divider configuration. |
| RW (Pin 7) | Wiper terminal | Movable contact point controlled by WR register; outputs interpolated voltage/resistance between RH and RL; source of analog feedback or gain control signal. |
| RL (Pin 6) | DCP low terminal | Fixed end of resistor ladder; connects to lowest potential node (e.g., GND or bias reference); forms bottom leg of divider or one end of rheostat. |
| CS (Pin 5) | Chip select input | Active-low enable for SPI communication; rising edge triggers write execution or initiates read data output; controls standby/shutdown entry timing. |
| SCK (Pin 4) | SPI clock input | Drives serial data transfer timing; supports up to 5MHz (≥1.7V VLOGIC) or 1MHz (1.2–1.6V VLOGIC); determines update rate for dynamic calibration loops. |
| SDI (Pin 3) | SPI data input | Receives instruction and data bytes (MSB-first); accepts WR writes, ACR configuration, and NOP commands; tolerant of 1.2V logic levels. |
| SDO (Pin 2) | SPI data output | Tri-state output (push-pull default) returning WR/ACR contents; configured via ACR[1]; requires external pull-up only if set to open-drain mode. |
| VLOGIC (Pin 1) | Digital supply input | Powers SPI interface and level shifter; decouples logic voltage from analog rail; enables interoperability with mixed-supply microcontrollers without external translators. |
Key Features
| Feature | Design Value |
|---|---|
| Volatile 8-bit Wiper Register (WR) | Enables real-time, software-controlled resistance adjustment with 256 discrete positions; retains value only during active power-ideal for adaptive calibration where settings are reloaded at boot. |
| Dual independent supplies (VCC/VLOGIC) | Eliminates need for external level shifters when interfacing with sub-1.8V MCUs (e.g., ARM Cortex-M0+), reducing BOM count and layout complexity in compact portable designs. |
| Shutdown mode with RW–RL short | Reduces system quiescent current to <2.8µA while preserving WR state; internal 2kΩ RW–RL path maintains defined DC bias point during sleep-critical for fast wake-up in medical sensors. |
| Daisy-chain SPI capability | Allows cascading multiple ISL23415 devices on single CS/SCK lines; simplifies multi-channel gain trimming (e.g., multi-stage RF amplifiers) without GPIO expansion or additional address decoding logic. |
| Extended temperature operation (-40°C to +125°C) | Validated performance across full industrial range ensures stable gain/offset in harsh environments like motor control enclosures or outdoor telecom base stations. |
Applications
| Power Supply Margining | RF Power Amplifier Bias Compensation |
|---|---|
|
Use Scenario: Adjusting reference voltage to ICs during production test to verify functional margins under worst-case voltage/temp conditions. IC Role / Device Role / Timing Role: Precision voltage divider setting VREF for DC-DC controller error amplifier; updated once per test cycle via SPI. Use Value: Enables automated, programmable margining without manual trimmer replacement; 10kΩ resistance and 70Ω wiper ensure minimal loading on reference nodes. |
Use Scenario: Dynamically compensating for temperature-induced drift in GaAs FET gate bias voltage to maintain constant output power. IC Role / Device Role / Timing Role: Rheostat-mode current source controlling base-emitter voltage; updated every 100ms based on thermal sensor feedback. Use Value: 256-step resolution allows <±0.5% bias correction; shutdown mode preserves last-set bias point during PA sleep cycles. |
| LCD Bias Compensation | Portable Medical Equipment Calibration |
|
Use Scenario: Fine-tuning VCOM voltage in TFT-LCD panels to eliminate image flicker and grayscale inversion across operating temperature. IC Role / Device Role / Timing Role: Voltage divider generating adjustable common electrode voltage; calibrated once per panel batch during manufacturing. Use Value: ±0.5 LSB INL ensures consistent gamma curve across 256 gray levels; 1200 kHz bandwidth supports fast display refresh without settling delay. |
Use Scenario: Calibrating sensor front-end gain in handheld ECG monitors to compensate for electrode impedance variation and battery voltage sag. IC Role / Device Role / Timing Role: Programmable gain-setting resistor in instrumentation amplifier feedback path; adjusted during device self-test at power-on. Use Value: Mid-scale power-on default (128) guarantees safe startup gain; 1.2V–5.5V VLOGIC supports direct connection to low-power MCU I/O without level translation. |
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 | Non-volatile EEPROM memory; 128 taps; 10kΩ; SPI interface; 2.7–5.5V single supply (no VLOGIC pin) | Requires no host reload at power-up; lacks independent logic supply for ultra-low-voltage MCU compatibility | Choose AD5170BRMZ-10 when persistent wiper setting is mandatory and VLOGIC independence is unnecessary. |
| MCP41HV51-103E/ST | High-voltage tolerant (up to 36V); 256 taps; 10kΩ; SPI interface; 2.7–5.5V supply; no VLOGIC pin; higher wiper resistance (120Ω typ) | Supports higher DCP terminal voltages but consumes more power and lacks 1.2V logic compatibility | Choose MCP41HV51-103E/ST when operating above 5.5V on RH/RL terminals is required and 1.2V MCU interfacing is not needed. |
Compared with AD5170BRMZ-10 and MCP41HV51-103E/ST, the ISL23415WFUZ-TK uniquely delivers 1.2V logic compatibility and true dual-supply operation-enabling direct integration with next-generation ultra-low-power MCUs while maintaining 10kΩ precision and 256-step resolution for portable medical and RF systems.
Availability
ISL23415WFUZ-TK is available at Aetrix Electronics and suitable for power supply margining, RF amplifier bias compensation, and portable medical equipment calibration requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ISL23415WFUZ-TK 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 is a global semiconductor leader delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, infrastructure, and IoT markets.
The ISL23415 belongs to Renesas' XDCP™ (eXternally Digitally Controlled Potentiometer) family, designed specifically for replacing mechanical trimmers in battery-powered, space-constrained, and thermally demanding applications where digital programmability, low power, and wide supply flexibility are critical.
FAQ
What is the resistance tolerance and temperature coefficient of ISL23415WFUZ-TK?
The ISL23415WFUZ-TK has a total resistance tolerance of ±2% and an end-to-end temperature coefficient of 175 ppm/°C (10kΩ option). These values are specified over -40°C to +125°C and ensure stable gain/offset performance in industrial and automotive environments where thermal drift must be minimized. The ISL23415WFUZ-TK's ratiometric temperature coefficient (TCV) is 8 ppm/°C at tap 0x80, further enhancing voltage-divider accuracy across temperature.
Does ISL23415WFUZ-TK support daisy-chaining, and how many devices can be cascaded?
Yes, ISL23415WFUZ-TK supports daisy-chaining via SDO-to-SDI connection with shared CS and SCK lines. The number of cascaded devices is limited only by the driving strength of the host MCU's SCK and CS pins; Renesas recommends buffering these lines for chains exceeding 5–8 units. Each ISL23415WFUZ-TK processes instructions in sequence, enabling simultaneous wiper updates across all devices on the rising edge of CS.
What happens to the wiper position during power-up and shutdown of ISL23415WFUZ-TK?
At power-up, the ISL23415WFUZ-TK initializes its volatile Wiper Register (WR) to 0x80 (128), placing the wiper at mid-scale-ensuring predictable startup behavior. In shutdown mode (SHDN bit = 0), the DCP terminals RH and RL become open-circuit while RW is internally shorted to RL through a 2kΩ resistor; the WR value is retained and restored upon exit, with wiper recall completing within 1.5 µs.
Can ISL23415WFUZ-TK operate with VLOGIC = 1.2V while VCC = 5.0V?
Yes, ISL23415WFUZ-TK fully supports independent VLOGIC and VCC supplies: VLOGIC may be as low as 1.2V (for 1.2V MCU I/O compatibility) while VCC operates up to 5.5V (for higher analog headroom). At VLOGIC = 1.2V, SCK frequency is limited to 1 MHz, and logic thresholds scale accordingly (VIH = 0.7 × VLOGIC), ensuring robust communication without external level shifting.
What are the key non-linearity specifications for ISL23415WFUZ-TK in voltage divider mode?
In voltage divider mode, the ISL23415WFUZ-TK guarantees ±0.5 LSB integral non-linearity (INL) and ±0.4 LSB differential non-linearity (DNL) over the full 256-tap range at 10kΩ. These specs-measured with VCC = 2.7–5.5V-ensure monotonic response and accurate stepwise voltage interpolation for precision calibration tasks such as LCD VCOM tuning or sensor gain adjustment.
ISL23415WFUZ-TK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 1
- Number of Taps:
- 256
- Resistance (Ohms):
- 10k
- Interface:
- SPI
- Memory Type:
- Volatile
- Voltage - Supply:
- 1.2V ~ 5.5V, 1.7V ~ 5.5V
- Features:
- -
- 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
ISL23415WFUZ-TK FAQ
1.How can I place an order for ISL23415WFUZ-TK through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL23415WFUZ-TK 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 ISL23415WFUZ-TK reliable?
The price and inventory of ISL23415WFUZ-TK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL23415WFUZ-TK is usually 5 days.
3.What payment methods are accepted for ISL23415WFUZ-TK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL23415WFUZ-TK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL23415WFUZ-TK?
ISL23415WFUZ-TK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL23415WFUZ-TK 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 ISL23415WFUZ-TK?
For technical support, including ISL23415WFUZ-TK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL23415WFUZ-TK requirements.
6.How does Aetrix verify that ISL23415WFUZ-TK is sourced from the original manufacturer or authorized distributors?
All ISL23415WFUZ-TK 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 ISL23415WFUZ-TK meets industry standards.
7.What is the process for return or replacement of ISL23415WFUZ-TK?
All ISL23415WFUZ-TK units undergo pre-shipment inspection (PSI). If there is an issue with ISL23415WFUZ-TK, 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 ISL23415WFUZ-TK part is unused and in its original packaging.
Return procedure for ISL23415WFUZ-TK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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