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Renesas ISL90810WAU8Z-TK
- Part No.:
- ISL90810WAU8Z-TK
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ISL90810WAU8Z-TK.pdf
- Description:
- IC DGTL POT 10KOHM 256TAP 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,289
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Product details
Overview
ISL90810WAU8Z-TK from Renesas (formerly Intersil) is a single-channel, digitally controlled potentiometer (XDCP™) implemented in monolithic CMOS, operating as a 256-tap I²C-addressable variable resistor or voltage divider. It features 10kΩ total resistance, ±0.75 LSB DNL in voltage divider mode, 70Ω typical wiper resistance at 3.3V, and operates across -40°C to +105°C for automotive-grade signal conditioning and biasing applications.
For engineers reviewing the ISL90810WAU8Z-TK datasheet, ISL90810WAU8Z-TK pinout, ISL90810WAU8Z-TK application, or ISL90810WAU8Z-TK equivalent, this page delivers verified electrical specifications, terminal-level design meaning, real-world use scenarios, and validated alternative options - all grounded in the FN8234 Rev 3.00 datasheet and Renesas product documentation.
Technical Context
The ISL90810WAU8Z-TK integrates a resistor ladder with CMOS switch matrix controlled by an 8-bit volatile Wiper Register (WR), directly accessible via I²C interface using address 0x00 and identification byte 0x50/0x51. Its architecture supports both three-terminal potentiometer and two-terminal rheostat configurations, with power-on reset to mid-scale (128 decimal).
It implements ratiometric temperature compensation (±4 ppm/°C TCV) and exhibits monotonicity across all 256 taps, with leakage current ≤1 µA on DCP pins and 1 µs wiper response time after I²C command completion - enabling precise, low-noise analog tuning in thermally varying environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Resistance | 10kΩ - defines full-scale analog range for voltage division or current limiting in bias networks. |
| Resolution | 256 taps (0.4% step resolution) - enables fine-grained adjustment of gain, offset, or threshold levels. |
| Wiper Resistance | 70Ω typical @ 3.3V - limits insertion error and thermal noise when used as adjustable feedback element. |
| Supply Range | 2.7V to 5.5V - compatible with 3.3V and 5V logic/system rails without level-shifting. |
| Standby Current | ≤5µA @ +105°C - preserves battery life in always-on sensor or control subsystems. |
| Temperature Range | -40°C to +105°C - qualified for under-hood automotive, industrial motor control, and high-reliability embedded systems. |
| I²C Interface | Standard-mode (400kHz), 7-bit ID 0x50/0x51 - enables direct integration with microcontrollers lacking dedicated analog trim hardware. |
Pinout & Package
8-lead MSOP (M8.118), RoHS-compliant, Pb-free plus anneal finish. Body dimensions: 3.0mm × 3.0mm × 1.1mm max height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 NC | No connection | Unbonded pad - must remain floating; no routing or solder mask opening required. |
| 2 SCL | I²C clock input | Accepts 400kHz open-drain clock; requires external pull-up; timing-critical for register access. |
| 3 SDA | I²C bidirectional data | Open-drain I/O; shares bus with other slaves; rise/fall times constrained by Cb ≤ 400pF. |
| 4 GND | Analog/digital ground reference | Single ground plane required; decoupling capacitor (0.1µF) must be placed adjacent to VCC–GND. |
| 5 RW | Wiper output | Low-impedance tap point; connects to op-amp input or feedback node; max ±3mA continuous current. |
| 6 RL | Low-end resistor terminal | Connects to system ground or negative rail; forms lower leg of voltage divider or rheostat path. |
| 7 RH | High-end resistor terminal | Connects to supply or positive reference; establishes upper boundary of resistive range. |
| 8 VCC | Power supply | 2.7–5.5V analog/digital rail; requires local 0.1µF ceramic bypass capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Power-on wiper preset | Automatically initializes to mid-scale (128) - ensures known startup state for bias circuits without host initialization delay. |
| Voltage divider linearity | ±0.75 LSB DNL (W version) - guarantees monotonic output across full temperature range, critical for closed-loop stability. |
| Ratiometric tempco | ±4 ppm/°C TCV - maintains consistent voltage division ratio despite ambient drift, eliminating need for calibration compensation. |
| Low leakage | ≤1 µA DCP pin leakage - prevents loading errors in high-impedance sensor interfaces or precision reference dividers. |
| Fast wiper settling | 1 µs response after I²C write - supports dynamic recalibration during real-time system operation (e.g., adaptive gain control). |
Applications
| Audio Signal Level Control | Automotive Sensor Biasing |
|---|---|
Use Scenario: Adjusting volume or tone in infotainment head units where mechanical potentiometers fail due to vibration and wear. IC Role / Device Role / Timing Role: Replaces electromechanical potentiometer as digitally tunable voltage divider in op-amp gain stage. Use Value: Eliminates contact bounce and wear-out; enables remote calibration via CAN-linked MCU using I²C bridge. | Use Scenario: Setting precise bias voltage for NTC thermistors or pressure transducers in engine control modules. IC Role / Device Role / Timing Role: Provides stable, temperature-compensated reference divider for analog front-end conditioning. Use Value: Maintains <±0.5% full-scale accuracy over -40°C to +105°C, reducing calibration points needed per production unit. |
| Industrial Power Supply Trim | Medical Instrument Offset Calibration |
Use Scenario: Fine-tuning output voltage of isolated DC-DC converters in programmable logic controller (PLC) power rails. IC Role / Device Role / Timing Role: Acts as two-terminal rheostat in feedback loop of TL431-based shunt regulator. Use Value: Enables factory or field firmware-based voltage adjustment without hardware change; 10kΩ value matches standard TL431 design practices. | Use Scenario: Calibrating zero-offset in ECG amplifier stages before patient connection. IC Role / Device Role / Timing Role: Configures DC bias point in instrumentation amplifier input network via I²C during device self-test. Use Value: Achieves <±10µV offset drift over temperature using 70Ω wiper resistance and low-leakage terminals. |
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 | 256-tap, 10kΩ, SPI interface, 3.3V-only supply (2.7–3.6V), 45Ω wiper R | Lacks automotive temp range (–40°C to +105°C); rated only to +85°C | Select when SPI-native host exists and extended temperature operation is not required. |
| MCP4017T-103I/OT | 128-tap, 10kΩ, I²C, 5V-tolerant inputs, 120Ω wiper R, 10µA standby | Lower resolution (128 vs 256 taps); higher wiper resistance increases gain error in precision dividers | Choose for cost-sensitive consumer designs where 0.8% step resolution suffices and 5V I/O compatibility is essential. |
Compared with ISL90810WAU8Z-TK, AD5170BRMZ-10 trades automotive qualification for SPI flexibility and lower wiper resistance, while MCP4017T-103I/OT offers broader voltage tolerance but sacrifices resolution and linearity - making ISL90810WAU8Z-TK optimal for high-accuracy, high-temp embedded trimming where I²C is available.
Availability
ISL90810WAU8Z-TK is available at Aetrix Electronics and suitable for automotive sensor biasing, industrial power supply trimming, and medical instrument calibration requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ISL90810WAU8Z-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 Corporation is a global leader in microcontrollers, analog, power management, and SoC solutions, delivering high-reliability semiconductors for automotive, industrial, and infrastructure markets.
The ISL90810WAU8Z-TK belongs to Renesas' legacy XDCP™ (eXternally Digitally Controlled Potentiometer) family, designed specifically for replacing mechanical trimmers in harsh-environment analog signal conditioning - emphasizing low noise, guaranteed monotonicity, and seamless I²C integration.
FAQ
What is the default wiper position of the ISL90810WAU8Z-TK at power-up?
The ISL90810WAU8Z-TK powers up with its wiper register initialized to 0x80 (128 decimal), placing the RW terminal at mid-scale between RH and RL. This behavior is hardwired and occurs regardless of prior I²C writes, ensuring predictable startup in bias and calibration circuits without host intervention.
Does the ISL90810WAU8Z-TK retain wiper settings after power cycling?
No, the ISL90810WAU8Z-TK uses a volatile wiper register only - all settings are lost upon power removal. It does not include EEPROM or nonvolatile storage. To restore a specific tap position, the host MCU must reissue an I²C write command to address 0x00 after each power-on reset.
Can the ISL90810WAU8Z-TK be used in rheostat mode with only two terminals?
Yes, the ISL90810WAU8Z-TK supports true two-terminal rheostat operation: connect RH to the signal source and RW to the load (leaving RL unconnected), or RL to ground and RW to the load (leaving RH unconnected). The datasheet confirms monotonicity and specified INL/DNL apply in both configurations per test conditions.
What is the maximum permissible voltage across RH and RL terminals of the ISL90810WAU8Z-TK?
The absolute maximum voltage between RH and RL is limited by the supply rail: the datasheet specifies "Voltage at Any DCP Pin With Respect to VSS" as –0.3V to VCC. Therefore, the maximum RH–RL differential is VCC (e.g., 5.5V), and exceeding this risks latch-up or permanent damage - no independent end-to-end rating exists beyond the supply constraint.
Is the ISL90810WAU8Z-TK pin-compatible with other members of the ISL90810 family?
Yes, all ISL90810 variants - including ISL90810WIU8Z, ISL90810UIU8Z, and ISL90810UAU8Z - share identical 8-lead MSOP (M8.118) packaging and pinout. Differences are limited to total resistance (10kΩ vs 50kΩ) and temperature grade (–40°C to +85°C vs –40°C to +105°C), allowing drop-in replacement where those parameters align.
ISL90810WAU8Z-TK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 8-TSSOP, 8-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:
- I2C
- Memory Type:
- Volatile
- Voltage - Supply:
- 2.7V ~ 5.5V
- Features:
- -
- Tolerance:
- ±20%
- Temperature Coefficient (Typ):
- ±35ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-MSOP
- Operating Temperature:
- -40°C ~ 105°C
- Resistance - Wiper (Ohms) (Typ):
- 70
ISL90810WAU8Z-TK FAQ
1.How can I place an order for ISL90810WAU8Z-TK through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL90810WAU8Z-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 ISL90810WAU8Z-TK reliable?
The price and inventory of ISL90810WAU8Z-TK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL90810WAU8Z-TK is usually 5 days.
3.What payment methods are accepted for ISL90810WAU8Z-TK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL90810WAU8Z-TK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL90810WAU8Z-TK?
ISL90810WAU8Z-TK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL90810WAU8Z-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 ISL90810WAU8Z-TK?
For technical support, including ISL90810WAU8Z-TK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL90810WAU8Z-TK requirements.
6.How does Aetrix verify that ISL90810WAU8Z-TK is sourced from the original manufacturer or authorized distributors?
All ISL90810WAU8Z-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 ISL90810WAU8Z-TK meets industry standards.
7.What is the process for return or replacement of ISL90810WAU8Z-TK?
All ISL90810WAU8Z-TK units undergo pre-shipment inspection (PSI). If there is an issue with ISL90810WAU8Z-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 ISL90810WAU8Z-TK part is unused and in its original packaging.
Return procedure for ISL90810WAU8Z-TK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL90810WAU8Z-TK Tags
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