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Renesas ISL23415TFRUZ-TK
- Part No.:
- ISL23415TFRUZ-TK
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 10-UFQFN
- Datasheet:
-
ISL23415TFRUZ-TK.pdf
- Description:
- IC DGTL POT 100KOHM 10UTQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,464
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Product details
Overview
ISL23415TFRUZ-TK from Renesas Electronics is a volatile, low-voltage, 256-tap digitally controlled potentiometer (DCP) with SPI interface, 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 - used for precision bias compensation in RF power amplifiers and LCD voltage adjustment.
For engineers reviewing the ISL23415TFRUZ-TK datasheet, ISL23415TFRUZ-TK pinout, ISL23415TFRUZ-TK application, or ISL23415TFRUZ-TK equivalent, this part supports daisy-chained SPI configuration, mid-scale power-on default (128), shutdown mode with RW–RL shorting, and 10 Ld µTQFN packaging for space-constrained portable medical and battery-powered instrumentation.
Technical Context
The ISL23415TFRUZ-TK 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 through SPI Mode 0 (CPOL=0, CPHA=0). Its dual-supply architecture isolates analog (VCC) and digital (VLOGIC) domains, enabling direct interfacing with 1.2V logic without level shifters.
It supports voltage divider and rheostat configurations, delivers ±0.15 LSB INL (100kΩ option), achieves 120kHz –3dB bandwidth at mid-tap, and enters shutdown with <2.8µA total current while preserving WR contents - critical for fast-recovery calibration systems requiring deterministic startup behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Resistance | 100kΩ - defines full-scale voltage division range and sets current-handling capability in rheostat mode. |
| Wiper Resistance | 70Ω typical @ VCC = 3.3V - limits insertion loss and thermal noise in signal-path applications. |
| Supply Ranges | VCC = 1.7V–5.5V; VLOGIC = 1.2V–5.5V - enables independent analog/digital rail scaling for mixed-voltage SoC interfaces. |
| INL (Voltage Divider) | ±0.15 LSB (100kΩ) - ensures monotonicity and sub-0.1% gain error across 256 taps for closed-loop bias control. |
| Shutdown Current | <2.8µA max - extends battery life in always-on portable equipment during idle periods. |
| Temperature Range | –40°C to +125°C - qualified for under-hood automotive and industrial ambient environments. |
| Package | 10 Ld µTQFN (2.1mm × 1.6mm) - supports high-density PCB layouts in handheld diagnostics and RF modules. |
Pinout & Package
ISL23415TFRUZ-TK uses a 10-lead µTQFN package (2.1mm × 1.6mm, 0.5mm pitch) with exposed thermal pad. Pin functions are electrically identical to the MSOP variant but physically rearranged per the µTQFN top-view layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RL) | DCP Low Terminal | Fixed end of resistor array; referenced to GND in voltage divider mode; forms one end of variable resistance in rheostat mode. |
| 2 (CS) | Chip Select Input | Active-low enable; initiates SPI transaction and powers up interface logic; must be pulsed HIGH→LOW before each command. |
| 3 (VCC) | Analog Power Supply | Supplies DCP core and wiper switches; sets maximum allowable voltage on RH/RL/RW pins (0V to VCC). |
| 4 (RH) | DCP High Terminal | Fixed end of resistor array; connected to VCC or reference voltage in divider mode; second terminal in rheostat mode. |
| 5 (GND) | Ground Reference | Common return for analog and digital sections; must be low-impedance to minimize noise coupling into wiper path. |
| 6 (SCK) | SPI Clock Input | Drives internal state machine; rising edge clocks SDI data in; falling edge clocks SDO data out (Mode 0). |
| 7 (SDI) | SPI Data Input | Receives instruction byte (MSB-first) and data bytes; accepts NOP, ACR read/write, WR read/write commands. |
| 8 (SDO) | SPI Data Output | Push-pull or open-drain configurable output; returns register contents on read cycles; tri-stated when CS is HIGH. |
| 9 (RW) | Wiper Terminal | Movable contact point; voltage or resistance varies linearly with WR register value; subject to 70Ω series resistance. |
| 10 (VLOGIC) | Digital Supply | Powers SPI interface and level shifter; decouples bus logic voltage from analog domain - allows 1.2V microcontroller direct drive. |
Key Features
| Feature | Design Value |
|---|---|
| Dual Independent Supplies | VCC (1.7–5.5V) and VLOGIC (1.2–5.5V) eliminate need for external level shifters between low-voltage MCUs and analog rails. |
| Volatile Wiper Register | 8-bit WR defaults to 0x80 (mid-scale) at power-up - ensures known, safe startup condition for bias-sensitive circuits. |
| Shutdown Mode | SHDN bit forces RH–RL open-circuit and RW–RL shorted via 2kΩ resistor - removes signal path leakage and prevents floating nodes. |
| Daisy Chain Support | SDO-to-SDI cascading enables multi-DCP control over single SPI bus - reduces GPIO count and simplifies layout in multi-channel systems. |
| Low Noise Performance | 61nV/√Hz resistor noise density (100kΩ) and –75dB PSRR - preserves SNR in precision sensor front-ends and audio gain stages. |
Applications
| Power Supply Margining | RF Power Amplifier Bias Compensation |
|---|---|
Use Scenario: Adjusting feedback resistors in DC/DC converter error amplifiers to validate output tolerance margins during production test. IC Role / Device Role / Timing Role: Digitally programmable two-terminal resistor replacing manual trimmer; updated via SPI during automated test sequence. Use Value: Enables software-defined margining without hardware change; 100kΩ resistance matches typical feedback network impedances while minimizing loading error. |
Use Scenario: Dynamically tuning gate bias voltage of GaAs FETs in cellular base station PA stages to compensate for temperature drift and aging. IC Role / Device Role / Timing Role: Voltage divider setting VGS reference; updated in real time by host MCU based on temperature sensor readings. Use Value: 120kHz –3dB bandwidth supports fast bias correction; ±0.15 LSB INL ensures stable quiescent current within ±1% across operating temperature. |
| LCD Bias Compensation | Portable Medical Equipment Calibration |
Use Scenario: Fine-tuning VCOM or gamma reference voltages in handheld ultrasound displays to maintain contrast uniformity across battery discharge cycles. IC Role / Device Role / Timing Role: Precision voltage divider in analog gamma correction chain; adjusted once per power cycle or during factory calibration. Use Value: 1.2V–5.5V VLOGIC compatibility allows direct connection to 1.8V display controller I/O; 10 Ld µTQFN fits tight display module footprints. |
Use Scenario: Calibrating sensor offset/gain in battery-powered ECG monitors using factory-measured coefficients stored in MCU flash. IC Role / Device Role / Timing Role: Rheostat-mode adjustable gain-setting resistor in instrumentation amplifier feedback loop. Use Value: 70Ω wiper resistance minimizes gain error contribution; shutdown mode (<2.8µA) preserves battery charge during standby between patient measurements. |
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 | Nonvolatile EEPROM memory; 256-tap; 100kΩ; SPI interface; 3mm × 3mm MSOP-10 package; higher 125Ω wiper resistance. | Retains wiper position after power loss - suitable for systems requiring last-known-state recovery without MCU intervention. | Select AD5175BRMZ-100 when nonvolatility is mandatory and board area permits larger MSOP package; avoid if low wiper resistance or µTQFN footprint is required. |
| MCP45HV51-103E/MS | Volatile DCP; 256-tap; 10kΩ (not 100kΩ); 5.5V max VDD; no separate VLOGIC pin; 10 Ld MSOP only; 100Ω wiper resistance. | Lacks dual-supply flexibility - requires shared 1.8–5.5V rail for logic/analog; limited to lower-resistance applications like current sensing. | Choose MCP45HV51-103E/MS only for 10kΩ rheostat use cases with single-supply constraints; not a functional substitute for ISL23415TFRUZ-TK's 100kΩ/1.2V logic support. |
Compared with AD5175BRMZ-100 and MCP45HV51-103E/MS, the ISL23415TFRUZ-TK uniquely combines 1.2V logic compatibility, 100kΩ resistance, ultra-low shutdown current, and µTQFN packaging - making it optimal for space- and power-constrained portable instrumentation where volatile operation is acceptable.
Availability
ISL23415TFRUZ-TK is available at Aetrix Electronics and suitable for RF power amplifier bias compensation, LCD bias adjustment, and portable medical equipment calibration requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ISL23415TFRUZ-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 connectivity solutions for automotive, industrial, and IoT markets.
The ISL23415 product line delivers digitally programmable precision resistors targeting battery-powered instrumentation, RF subsystems, and display biasing - emphasizing low-voltage operation, small footprint, and robust SPI configurability.
FAQ
What is the default wiper position of the ISL23415TFRUZ-TK at power-up?
The ISL23415TFRUZ-TK powers up with its volatile Wiper Register (WR) preset to 0x80 (decimal 128), placing the wiper at mid-scale - ensuring a known, symmetric starting point for voltage divider or rheostat operation without MCU initialization.
Does the ISL23415TFRUZ-TK support daisy-chaining multiple devices on a single SPI bus?
Yes, the ISL23415TFRUZ-TK supports daisy-chain configuration: connect the SDO pin of one device to the SDI pin of the next, with shared SCK and CS lines. This enables simultaneous write/read operations across multiple ISL23415TFRUZ-TK units using reversed instruction sequencing.
What is the maximum clock frequency supported by the ISL23415TFRUZ-TK SPI interface?
The ISL23415TFRUZ-TK supports up to 5MHz SCK frequency when VLOGIC ≥ 1.7V; at VLOGIC = 1.2V–1.6V, the maximum SCK frequency is 1MHz - ensuring reliable timing margins across its full logic supply range.
How does the shutdown mode affect the terminals of the ISL23415TFRUZ-TK?
In shutdown mode (SHDN bit = 0), the ISL23415TFRUZ-TK opens the RH–RL path and internally shorts RW to RL via a 2kΩ resistor - effectively disabling the potentiometer function while preserving the last WR value for fast restoration upon exit.
Is the ISL23415TFRUZ-TK compatible with 1.2V logic-level microcontrollers without level shifting?
Yes, the ISL23415TFRUZ-TK features a dedicated VLOGIC pin supporting 1.2V–5.5V, allowing direct connection to 1.2V I/Os of modern ultra-low-power MCUs - eliminating external level translators and reducing BOM cost and board area.
ISL23415TFRUZ-TK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 10-UFQFN
- 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-UTQFN (2.1x1.6)
- Operating Temperature:
- -40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ):
- 70
ISL23415TFRUZ-TK FAQ
1.How can I place an order for ISL23415TFRUZ-TK through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL23415TFRUZ-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 ISL23415TFRUZ-TK reliable?
The price and inventory of ISL23415TFRUZ-TK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL23415TFRUZ-TK is usually 5 days.
3.What payment methods are accepted for ISL23415TFRUZ-TK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL23415TFRUZ-TK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL23415TFRUZ-TK?
ISL23415TFRUZ-TK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL23415TFRUZ-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 ISL23415TFRUZ-TK?
For technical support, including ISL23415TFRUZ-TK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL23415TFRUZ-TK requirements.
6.How does Aetrix verify that ISL23415TFRUZ-TK is sourced from the original manufacturer or authorized distributors?
All ISL23415TFRUZ-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 ISL23415TFRUZ-TK meets industry standards.
7.What is the process for return or replacement of ISL23415TFRUZ-TK?
All ISL23415TFRUZ-TK units undergo pre-shipment inspection (PSI). If there is an issue with ISL23415TFRUZ-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 ISL23415TFRUZ-TK part is unused and in its original packaging.
Return procedure for ISL23415TFRUZ-TK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL23415TFRUZ-TK Tags
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