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Renesas ISL23415TFUZ-TK
- Part No.:
- ISL23415TFUZ-TK
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ISL23415TFUZ-TK.pdf
- Description:
- IC DGT POT 100KOHM 256TAP 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,075
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Product details
Overview
ISL23415TFUZ-TK from Renesas Electronics is a volatile, low-voltage, SPI-controlled 256-tap digitally controlled potentiometer (DCP) with 100kΩ end-to-end resistance, 70Ω typical wiper resistance at 3.3V, and operation from 1.7V to 5.5V VCC and 1.2V to 5.5V VLOGIC. It functions as a precision three-terminal potentiometer or two-terminal rheostat in battery-powered instrumentation calibration and power supply margining.
For engineers reviewing the ISL23415TFUZ-TK datasheet, ISL23415TFUZ-TK pinout, ISL23415TFUZ-TK application, or ISL23415TFUZ-TK equivalent, key selection criteria include its 100kΩ resistance option, MSOP-10 package, -40°C to +125°C extended temperature range, shutdown mode with <2.8µA max current, and daisy-chainable SPI interface supporting 1.2V logic without level shifting.
Technical Context
The ISL23415TFUZ-TK implements a monolithic CMOS resistor ladder with CMOS wiper switches and integrated SPI interface logic. Its volatile Wiper Register (WR) defaults to 128 (mid-scale) at power-on and supports direct read/write via SPI Mode 0, with make-before-break switching and configurable push-pull or open-drain SDO output.
It features independent analog (VCC) and digital (VLOGIC) supplies, enabling direct interfacing with 1.2V microcontrollers while driving DCP terminals up to VCC. Shutdown mode forces RH–RL open-circuit and internally shorts RW to RL through a 2kΩ resistor, preserving WR contents for fast recall.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Resistance | 100kΩ - defines full-scale voltage division ratio and sets minimum load impedance compatibility in gain control circuits. |
| Wiper Resistance | 70Ω typical @ 3.3V - limits voltage error and thermal noise in precision divider applications; increases to 580Ω at 1.7V VCC. |
| Supply Ranges | VCC = 1.7V–5.5V, VLOGIC = 1.2V–5.5V - enables mixed-supply systems and eliminates need for external level shifters with low-voltage MCUs. |
| Temperature Range | -40°C to +125°C - qualified for under-hood automotive, industrial power supplies, and portable medical equipment environments. |
| Shutdown Current | <2.8µA max - extends battery life in always-on sensor nodes or standby-mode calibration subsystems. |
| Integral Non-linearity | ±0.5 LSB (T option) - ensures monotonicity and ≤0.2% full-scale error in closed-loop bias compensation loops. |
| Settling Time | 3.5µs (T option) - supports dynamic adjustment in real-time RF amplifier bias tuning with minimal transient disruption. |
Pinout & Package
ISL23415TFUZ-TK is packaged in a Pb-free, RoHS-compliant 10-lead MSOP (M10.118), 3.0mm × 3.0mm × 1.0mm body height, moisture sensitivity level 1 (MSL1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 9) | Analog power supply | Provides bias for resistor array and wiper switches; sets maximum DCP terminal voltage (0V to VCC). |
| GND (Pin 10) | Analog ground reference | Common return for RH, RL, RW and internal analog circuitry; must be low-impedance for noise-sensitive applications. |
| RH (Pin 8) | High terminal of DCP | Fixed end of resistor ladder; connects to highest potential node (e.g., VCC or reference voltage) in divider mode. |
| RW (Pin 7) | Wiper terminal | Movable contact position set by 8-bit WR register; delivers adjustable voltage or resistance between RH and RL. |
| RL (Pin 6) | Low terminal of DCP | Fixed end of resistor ladder; connects to GND or lowest potential node in divider mode; shorted to RW in shutdown. |
| CS (Pin 5) | Chip select input | Active-low enable; initiates SPI communication and controls standby/shutdown entry/exit timing. |
| SCK (Pin 4) | SPI clock input | Drives serial data transfer; supports up to 5MHz (≥1.7V VLOGIC) or 1MHz (1.2V–1.6V VLOGIC). |
| SDI (Pin 3) | SPI data input | Receives instruction and data bytes on rising edge; supports daisy-chain configuration when cascaded with SDO. |
| SDO (Pin 2) | SPI data output | Transmits register data on falling edge; configurable as push-pull (default) or open-drain for bus sharing. |
| VLOGIC (Pin 1) | Digital supply | Powers SPI interface and level shifter; decouples logic voltage from analog rail, enabling 1.2V MCU compatibility. |
Key Features
| Feature | Design Value |
|---|---|
| 256-tap resolution | Enables 0.4% step granularity in 100kΩ span, sufficient for fine-grained gain trimming in medical sensor front-ends. |
| Daisy-chain SPI support | Allows single MCU SPI port to configure multiple ISL23415 devices without additional chip-select lines or GPIO overhead. |
| Volatile mid-scale power-on default | Guarantees known initial state (128) at startup-critical for safe power-up sequencing in margining and bias circuits. |
| Independent VCC/VLOGIC rails | Permits simultaneous use of 3.3V analog domain and 1.8V/1.2V digital domain, reducing system-level power conversion complexity. |
| Shutdown mode with RW–RL short | Isolates RH–RL path while maintaining wiper position memory and minimizing leakage (<2.8µA), ideal for sleep-mode calibration retention. |
Applications
| Power Supply Margining | RF Power Amplifier Bias Compensation |
|---|---|
|
Use Scenario: Adjusting reference voltage to IC voltage regulators during production test to verify tolerance margins under worst-case conditions. IC Role / Device Role / Timing Role: Precision voltage divider setting feedback node voltage; operates in static or infrequent-step mode during test sequences. Use Value: 100kΩ resistance minimizes regulator loading; ±0.5 LSB INL ensures accurate margin thresholds; shutdown mode preserves settings between tests. |
Use Scenario: Dynamically compensating for temperature-induced drift in GaN FET gate bias voltage across operating temperature range. IC Role / Device Role / Timing Role: Rheostat-mode current source control element; updated every 100ms via SPI based on temperature sensor readings. Use Value: 3.5µs wiper settling time enables rapid correction; 1.2V–5.5V VLOGIC allows direct connection to low-power MCU; 70Ω wiper resistance limits bias error. |
| LCD Bias Compensation | Portable Medical Equipment Calibration |
|
Use Scenario: Fine-tuning VCOM voltage in TFT-LCD panels to minimize image flicker and improve grayscale uniformity across display lifetime. IC Role / Device Role / Timing Role: Three-terminal potentiometer in resistive divider network; adjusted once per panel batch during factory calibration. Use Value: 100kΩ total resistance matches typical LCD bias network impedances; -40°C to +125°C rating covers storage and operational extremes. |
Use Scenario: Calibrating analog front-end gain in handheld ECG monitors to maintain signal fidelity across battery discharge cycles. IC Role / Device Role / Timing Role: Programmable gain-setting element in instrumentation amplifier feedback path; reconfigured only during device boot or recalibration. Use Value: Volatile WR register enables secure calibration reset on firmware update; 70Ω wiper resistance avoids gain error amplification; MSOP-10 footprint fits space-constrained PCBs. |
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 memory; 256 taps; 100kΩ; SPI interface; 2.7V–5.5V single supply; no separate VLOGIC rail. | Retains wiper position after power loss-suited for systems requiring persistent calibration without host intervention. | Select AD5175BRMZ-100 when non-volatility is mandatory; ISL23415TFUZ-TK is preferred for lower cost, faster write cycles, and dual-supply flexibility. |
| MCP41HV51-104E/SN | Volatile DCP; 256 taps; 100kΩ; SPI interface; 4.5V–18V high-voltage operation; no 1.2V logic support. | Rated for industrial HV bias networks (e.g., laser diode drivers); lacks low-voltage logic compatibility and extended temp range. | Choose MCP41HV51-104E/SN for >5.5V analog rails; ISL23415TFUZ-TK excels in battery-powered, wide-temp, low-VLOGIC designs. |
Compared with AD5175BRMZ-100 and MCP41HV51-104E/SN, ISL23415TFUZ-TK uniquely combines 1.2V logic compatibility, extended -40°C to +125°C operation, and ultra-low shutdown current-making it optimal for portable, automotive, and industrial embedded calibration where power, voltage, and temperature constraints dominate.
Availability
ISL23415TFUZ-TK is available at Aetrix Electronics and suitable for power supply margining, RF amplifier bias compensation, LCD bias adjustment, and portable medical calibration requiring stable component supply across extended temperature and low-voltage operating conditions.
Supply support for ISL23415TFUZ-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, and IoT markets with emphasis on reliability and long-term support.
The ISL23415 belongs to Renesas' XDCP™ (eXternally Digitally Controlled Potentiometer) family, designed specifically for precision, low-power, and mixed-voltage analog trimming in battery-operated and thermally demanding embedded systems.
FAQ
What is the resistance value and tolerance of ISL23415TFUZ-TK?
The ISL23415TFUZ-TK has a nominal end-to-end resistance of 100kΩ with a tolerance of ±2% over temperature. This value is confirmed in the Ordering Information table and Analog Specifications section of the FN7780 datasheet, and applies specifically to the "T" option marked part. The 100kΩ value directly determines voltage division ratios and gain-setting accuracy in applications like power supply margining and LCD bias networks.
Does ISL23415TFUZ-TK retain wiper position after power cycling?
No, ISL23415TFUZ-TK is a volatile DCP: its Wiper Register (WR) resets to 128 (mid-scale) on every power-up. This behavior is explicitly stated in the datasheet's "Principles of Operation" section and is inherent to the device architecture. For non-volatile storage, alternative parts such as the AD5175BRMZ-100 would be required-but ISL23415TFUZ-TK's deterministic mid-scale start simplifies safe power-on sequencing in margining and calibration systems.
Can ISL23415TFUZ-TK operate with a 1.2V microcontroller SPI bus?
Yes, ISL23415TFUZ-TK supports 1.2V logic levels via its dedicated VLOGIC pin, which accepts 1.2V to 5.5V. The datasheet specifies valid VIH/VIL thresholds and 1MHz SCK operation down to 1.2V, eliminating external level shifters. This capability is confirmed in the "Recommended Operating Conditions" and "Serial Interface Specification" tables and is a defining feature distinguishing ISL23415TFUZ-TK from many competing DCPs.
What package type is used for ISL23415TFUZ-TK?
ISL23415TFUZ-TK uses the 10-lead MSOP (Mini Small Outline Package) with package drawing M10.118, as specified in the Ordering Information table. It is not the µTQFN variant (e.g., ISL23415TFRUZ-TK). The MSOP-10 package measures 3.0mm × 3.0mm × 1.0mm and is RoHS-compliant with matte tin (e3) termination, suitable for reflow soldering per J-STD-020 MSL1 requirements.
How does shutdown mode affect the terminals of ISL23415TFUZ-TK?
In shutdown mode (activated by SHDN bit in ACR), ISL23415TFUZ-TK forces an open circuit between RH and RL while internally shorting RW to RL through a 2kΩ resistor. This configuration isolates the analog path but maintains wiper position memory. The behavior is documented in Figure 18 ("DCP Connection in Shutdown Mode") and the "Shutdown Function" section, and ensures safe, low-leakage standby in battery-critical applications.
ISL23415TFUZ-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:
- Active
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 1
- 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):
- 70ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 10-MSOP
- Operating Temperature:
- -40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ):
- 70
ISL23415TFUZ-TK FAQ
1.How can I place an order for ISL23415TFUZ-TK through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL23415TFUZ-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 ISL23415TFUZ-TK reliable?
The price and inventory of ISL23415TFUZ-TK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL23415TFUZ-TK is usually 5 days.
3.What payment methods are accepted for ISL23415TFUZ-TK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL23415TFUZ-TK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL23415TFUZ-TK?
ISL23415TFUZ-TK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL23415TFUZ-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 ISL23415TFUZ-TK?
For technical support, including ISL23415TFUZ-TK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL23415TFUZ-TK requirements.
6.How does Aetrix verify that ISL23415TFUZ-TK is sourced from the original manufacturer or authorized distributors?
All ISL23415TFUZ-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 ISL23415TFUZ-TK meets industry standards.
7.What is the process for return or replacement of ISL23415TFUZ-TK?
All ISL23415TFUZ-TK units undergo pre-shipment inspection (PSI). If there is an issue with ISL23415TFUZ-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 ISL23415TFUZ-TK part is unused and in its original packaging.
Return procedure for ISL23415TFUZ-TK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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