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Renesas ISL90810UIU8Z
- Part No.:
- ISL90810UIU8Z
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ISL90810UIU8Z.pdf
- Description:
- IC DGTL POT 50KOHM 256TAP 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,530
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Product details
Overview
ISL90810UIU8Z from Renesas (formerly Intersil) is a single-channel, digitally controlled potentiometer (XDCP™) implemented in monolithic CMOS, configured as a 50kΩ end-to-end resistor with 256 taps, I²C interface, and mid-scale power-on default (128). It operates from 2.7V to 5.5V, delivers 0.4% resolution, and targets precision analog trimming in industrial sensor signal conditioning circuits.
For engineers reviewing the ISL90810UIU8Z datasheet, ISL90810UIU8Z pinout, ISL90810UIU8Z application, or ISL90810UIU8Z equivalent, key selection considerations include its 50kΩ total resistance, ±0.5 LSB DNL (U-grade), 70Ω typical wiper resistance at 3.3V, 5µA max standby current, and 8-lead MSOP package compatibility with space-constrained analog front-ends.
Technical Context
The ISL90810UIU8Z implements a resistor ladder with CMOS switch matrix controlled by an 8-bit volatile Wiper Register (WR), directly accessible via I²C at slave address 0x50 (00h). Its architecture supports both voltage divider and rheostat modes, with monotonic tap transitions and guaranteed mid-scale startup (WR = 0x80).
It features ratiometric temperature coefficient of ±4 ppm/°C in voltage divider mode and ±35 ppm/°C in rheostat mode, with leakage <1 µA on DCP pins and 1 µs wiper response time after I²C command completion. The device complies with standard I²C timing (400 kHz max SCL, tLOW ≥1300 ns, tHIGH ≥600 ns) and supports 2.7–5.5V supply operation across –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Resistance | 50kΩ - defines full-scale analog range for voltage division or variable resistance applications. |
| Resolution | 256 taps (0.4%) - enables fine-grained adjustment with 1 LSB ≈ 0.39% of VCC in divider mode. |
| DNL (U grade) | ±0.5 LSB - ensures monotonicity and predictable step-linearity across all taps in voltage divider mode. |
| Wiper Resistance | 70Ω typical @ 3.3V - minimizes insertion error and loading effects when used as adjustable gain or offset element. |
| Standby Current | 5µA max @ –40°C to +85°C - supports low-power system sleep states without losing wiper position. |
| Supply Range | 2.7V to 5.5V - interoperable with 3.3V and 5V logic domains and mixed-supply systems. |
| I²C Interface | Standard-mode (400 kHz), 7-bit address 0x50 - enables direct connection to microcontrollers without level-shifting. |
Pinout & Package
ISL90810UIU8Z is housed in an 8-lead MSOP (Pb-free, RoHS-compliant) package per drawing M8.118, with 0.65 mm lead pitch, 3.0 mm × 3.0 mm body, and exposed pad not connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 NC | No connection | Unbonded die pad - must be left floating or grounded per layout best practice; no electrical function. |
| 2 SCL | I²C clock input | Accepts open-drain clock signals up to 400 kHz; internal hysteresis improves noise immunity. |
| 3 SDA | I²C bidirectional data | Open-drain I/O with 0.4V VOL @ 4mA sink; requires external pull-up for bus communication. |
| 4 GND | Analog/digital ground reference | Common return for VCC, DCP terminals, and I²C interface; critical for low-noise potentiometer operation. |
| 5 RW | Wiper terminal | Output node whose voltage/resistance varies with WR register; 70Ω typical series resistance affects signal integrity. |
| 6 RL | Low terminal | Fixed end of resistor string; tied to GND in voltage divider mode; defines lower bound of adjustable range. |
| 7 RH | High terminal | Fixed end of resistor string; tied to VCC in voltage divider mode; defines upper bound of adjustable range. |
| 8 VCC | Power supply | 2.7–5.5V analog/digital supply; powers I²C interface and DCP switches; decoupling near pin essential. |
Key Features
| Feature | Design Value |
|---|---|
| 256-tap digital control | Enables precise, repeatable, and non-mechanical resistance adjustment without manual calibration or drift. |
| Mid-scale power-on default (128) | Guarantees known initial state (VOUT ≈ VCC/2) at boot, eliminating startup transients in feedback loops. |
| Low wiper resistance (70Ω typ) | Reduces gain error and THD in op-amp gain-setting configurations; maintains accuracy under load. |
| Ratiometric tempco (±4 ppm/°C) | Preserves voltage division ratio stability over temperature - critical for sensor bridge biasing and ADC reference scaling. |
| 5µA max standby current | Allows integration into always-on subsystems (e.g., battery-backed sensor nodes) without compromising runtime. |
Applications
| Industrial Sensor Calibration | Programmable Gain Amplifier |
|---|---|
|
Use Scenario: Trimming offset and span in 4–20 mA transmitter circuits using RTD or strain gauge sensors. IC Role / Device Role / Timing Role: Precision two-terminal rheostat setting bridge excitation current and three-terminal voltage divider scaling amplifier reference. Use Value: Eliminates manual trimpots subject to vibration drift; enables factory/software calibration with ±0.5 LSB DNL ensuring linearity compliance per IEC 61000-4-2. |
Use Scenario: Configuring closed-loop gain in instrumentation amplifiers for multi-range data acquisition systems. IC Role / Device Role / Timing Role: Digitally reconfigurable feedback resistor in op-amp circuit, controlled via I²C during system initialization or range switching. Use Value: Achieves 0.4% gain resolution across 50kΩ range with <1 µs wiper settling, enabling sub-0.1% total system gain error without external DAC or precision resistors. |
| ADC Reference Divider | LED Current Bias Control |
|
Use Scenario: Generating stable, temperature-compensated reference voltages for SAR and delta-sigma ADCs in PLC analog input modules. IC Role / Device Role / Timing Role: Voltage divider between VCC and GND, with RW feeding ADC reference pin; ratiometric tempco preserves VREF/VCC ratio. Use Value: Delivers ±4 ppm/°C ratiometric tracking - reduces reference-induced INL contribution to <0.05 LSB over –40°C to +85°C ambient. |
Use Scenario: Setting constant-current bias for high-brightness LEDs in industrial HMI backlighting with thermal derating. IC Role / Device Role / Timing Role: Two-terminal variable resistor in LED cathode path, adjusted dynamically to compensate for forward voltage drift with temperature. Use Value: Enables real-time brightness stabilization using on-board temperature sensor and I²C write, leveraging 50kΩ range and 70Ω wiper to minimize current-sense error. |
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-50 | 50kΩ, 256-tap, SPI interface, 3.3V-only supply (2.7–3.6V), 45Ω wiper R, ±0.3 LSB DNL | Requires SPI host; narrower VCC range limits 5V system use; lower wiper R improves low-voltage precision | Select when SPI is preferred and supply is strictly 3.3V; avoid in mixed 3.3V/5V designs or where I²C bus sharing is required. |
| MCP41HV51-503 | 50kΩ, 256-tap, SPI interface, 10–36V high-voltage operation, 120Ω wiper R, ±1 LSB DNL | Supports industrial HV rails (e.g., 24V PLC I/O); higher wiper R increases gain error in low-VCC signal paths | Choose for high-side biasing or 24V sensor excitation; not suitable for low-noise 3.3V analog signal chains due to DNL and wiper R. |
Compared with AD5170BRMZ-50 and MCP41HV51-503, the ISL90810UIU8Z uniquely combines I²C compatibility, 2.7–5.5V universal supply, ±0.5 LSB U-grade linearity, and 70Ω wiper resistance - making it optimal for space-constrained, low-power, multi-voltage industrial analog front-ends requiring software-trimmable precision.
Availability
ISL90810UIU8Z is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable gain amplification, ADC reference scaling, LED bias control, and analog front-end trimming requiring stable component supply across extended temperature ranges.
Supply support for ISL90810UIU8Z 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 (acquired Intersil in 2017) is a global leader in microcontrollers, analog, and power management ICs, serving industrial, automotive, and infrastructure markets with high-reliability silicon solutions.
The ISL90810UIU8Z belongs to Renesas' XDCP™ digitally controlled potentiometer family, designed specifically for replacing mechanical trimpots in automated calibration, closed-loop analog control, and reconfigurable signal conditioning systems.
FAQ
What is the total resistance and tolerance of the ISL90810UIU8Z?
The ISL90810UIU8Z has a nominal total resistance (RH to RL) of 50kΩ with a tolerance of ±20% across temperature and process variation. This value is specified in the Analog Specifications table of the FN8234 datasheet and applies to the U-grade version (ISL90810UIU8Z). The device maintains this resistance with ±35 ppm/°C temperature coefficient in rheostat mode.
Does the ISL90810UIU8Z retain wiper position after power cycling?
No, the ISL90810UIU8Z uses a volatile wiper register and resets to mid-scale (128) on every power-up. It does not include EEPROM or nonvolatile storage. To restore a specific setting, the host controller must reissue an I²C write command to address 0x00 after power-on reset - a behavior explicitly documented in the Principles of Operation section of the FN8234 datasheet.
What is the I²C slave address of the ISL90810UIU8Z?
The ISL90810UIU8Z uses a fixed 7-bit I²C slave address of 0x50 (binary 1010000), formed by the identification byte 0101000 followed by the R/W bit. This address is confirmed in Table 1 and the I²C Serial Interface section of the FN8234 datasheet and is not configurable via pins or registers.
Can the ISL90810UIU8Z be used in rheostat mode with only two terminals?
Yes, the ISL90810UIU8Z supports rheostat mode by connecting either RH or RL to the same node as RW and leaving the unused terminal open. The datasheet's Equivalent Circuitry diagram and Analog Specifications (RINL, RDNL, TCR) explicitly validate performance in this configuration, with 50kΩ resistance adjustable between RW and RL (or RW and RH) and ±0.5 LSB DNL for the U-grade variant.
What is the maximum operating temperature range for the ISL90810UIU8Z?
The ISL90810UIU8Z is rated for operation from –40°C to +85°C, as specified in the Ordering Information table and Recommended Operating Conditions section of the FN8234 datasheet. This industrial temperature grade is indicated by the "I" suffix in the part number (ISL90810UIU8Z), distinguishing it from the automotive-grade "A" variant (ISL90810UAU8Z).
ISL90810UIU8Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 8-TSSOP, 8-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):
- 50k
- 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 ~ 85°C
- Resistance - Wiper (Ohms) (Typ):
- 70
ISL90810UIU8Z FAQ
1.How can I place an order for ISL90810UIU8Z through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL90810UIU8Z 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 ISL90810UIU8Z reliable?
The price and inventory of ISL90810UIU8Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL90810UIU8Z is usually 5 days.
3.What payment methods are accepted for ISL90810UIU8Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL90810UIU8Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL90810UIU8Z?
ISL90810UIU8Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL90810UIU8Z 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 ISL90810UIU8Z?
For technical support, including ISL90810UIU8Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL90810UIU8Z requirements.
6.How does Aetrix verify that ISL90810UIU8Z is sourced from the original manufacturer or authorized distributors?
All ISL90810UIU8Z 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 ISL90810UIU8Z meets industry standards.
7.What is the process for return or replacement of ISL90810UIU8Z?
All ISL90810UIU8Z units undergo pre-shipment inspection (PSI). If there is an issue with ISL90810UIU8Z, 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 ISL90810UIU8Z part is unused and in its original packaging.
Return procedure for ISL90810UIU8Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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