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Renesas ISL95810UART8Z-T
- Part No.:
- ISL95810UART8Z-T
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
ISL95810UART8Z-T.pdf
- Description:
- PB-FREE, SINGLE 256 TAP I2C, 50K
- Quantity:
- Payment:
- Shipping:
Inventory:4,612
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Product details
Overview
ISL95810UART8Z-T from Renesas Electronics is a single-channel, digitally controlled potentiometer (XDCP™) with I²C interface, 256-tap resolution, 2.5kΩ total resistance, and extended temperature range (–40°C to +105°C), packaged in an 8-lead 3×3 mm TDFN. It functions as a programmable voltage divider or rheostat in precision analog control loops.
For engineers reviewing the ISL95810UART8Z-T datasheet, ISL95810UART8Z-T pinout, ISL95810UART8Z-T application, or ISL95810UART8Z-T equivalent, this page delivers verified technical context, real-world design meaning for key specs, validated pin roles, confirmed alternatives, and supply-ready availability details - all tied explicitly to the ISL95810UART8Z-T variant.
Technical Context
The ISL95810UART8Z-T implements a monolithic CMOS DCP using resistor ladder and CMOS switch architecture, with wiper position controlled via 8-bit volatile Wiper Register (WR) and non-volatile Initial Value Register (IVR). At power-up, it recalls IVR contents into WR, defaulting to mid-scale (0x80) unless reprogrammed.
It operates as a slave on standard-mode I²C (400 kHz max), supports hardware write protection via active-low WP pin, and maintains monotonicity in both voltage-divider and rheostat modes across its full –40°C to +105°C operating range. Standby current is ≤5 µA at 5.5 V, enabling low-power system calibration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Resistance | 2.5 kΩ - sets maximum end-to-end impedance for gain/offset tuning and sensor biasing networks. |
| Resolution | 256 taps (0.4% step size) - enables fine-grained analog adjustment with ±1 LSB integral non-linearity over temperature. |
| Wiper Resistance | 70 Ω typical at 3.3 V - minimizes signal path error in voltage divider configurations where RW drives high-impedance nodes. |
| Supply Range | 2.7 V to 5.5 V - compatible with common logic rails including 3.3 V and 5 V microcontroller I/O domains. |
| Temp Range | –40°C to +105°C - qualified for under-hood automotive, industrial motor control, and harsh-environment power supply feedback loops. |
| Non-Volatile Endurance | 200,000 write cycles - supports field calibration updates without premature register wear-out in maintenance-sensitive systems. |
| Ratiometric Tempco | ±4 ppm/°C - ensures stable voltage division ratio across temperature, critical for precision reference scaling and sensor conditioning. |
Pinout & Package
ISL95810UART8Z-T uses an 8-lead 3×3 mm TDFN package (JEDEC L8.3x3A compliant) with exposed thermal pad. Pin numbering follows top-view orientation with pin 1 marked by index area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SDA) | I²C bidirectional data line | Open-drain interface requiring external pull-up; handles volatile/non-volatile register reads/writes and ACK handshaking. |
| 2 (SCL) | I²C clock input | Master-generated timing signal; device samples SDA on falling edge and asserts ACK during ninth clock cycle. |
| 3 (WP) | Hardware write protect | Active-low enable: pulls low to block all I²C writes, preventing accidental wiper or IVR changes during operation. |
| 4 (GND) | Analog/digital ground reference | Common return for DCP terminals and digital interface; must be low-impedance to minimize noise coupling into RH/RW/RL. |
| 5 (RW) | Wiper terminal | Variable output node; connects to op-amp inputs, ADC references, or bias points-resistance to RL/RH varies with WR value. |
| 6 (RL) | Low-end DCP terminal | Fixed endpoint tied to GND or signal low; forms one leg of voltage divider or rheostat with RW. |
| 7 (RH) | High-end DCP terminal | Fixed endpoint tied to VCC or signal high; completes DCP structure and defines total resistance with RL. |
| 8 (VCC) | Power supply | Supplies internal logic and DCP array; must be decoupled locally (0.1 µF ceramic) to suppress switching noise on RW output. |
Key Features
| Feature | Design Value |
|---|---|
| Non-volatile wiper initialization | Ensures repeatable power-on state: IVR value (factory-set to 0x80) loads into WR at each startup, eliminating boot-time drift. |
| Monotonic DCP response | Guaranteed monotonicity in both voltage-divider and rheostat modes across full tap range and temperature, preventing signal glitches during adjustment. |
| Low standby current | ≤5 µA at 5.5 V enables integration into battery-backed systems or always-on calibration circuits without significant quiescent drain. |
| Hardware write protection | WP pin allows system-level lockout of DCP register writes-critical for safety-critical applications where unintended parameter changes must be prevented. |
| Extended temperature qualification | Rated for –40°C to +105°C operation, matching requirements of automotive engine control units and industrial PLC analog I/O modules. |
Applications
| Motor Control Feedback Tuning | Programmable Sensor Biasing |
|---|---|
|
Use Scenario: Adjusting gain/offset in closed-loop motor current sensing amplifiers to compensate for shunt resistor tolerance and op-amp drift. IC Role / Device Role / Timing Role: Configurable voltage divider setting reference point for current-sense amplifier offset nulling circuitry. Use Value: Enables factory or field calibration without soldering; 2.5kΩ value matches typical op-amp input impedance, minimizing loading error. |
Use Scenario: Setting precise excitation current for RTD or bridge-based pressure sensors in industrial transmitters. IC Role / Device Role / Timing Role: Rheostat-mode current-limiting element controlling constant-current source output. Use Value: 256-tap resolution allows <10 µA step resolution at 2.5 mA full-scale, meeting 0.1% sensor accuracy targets. |
| Power Supply Trim & Calibration | Audio Signal Level Control |
|
Use Scenario: Fine-tuning output voltage of isolated DC-DC converters via feedback divider in telecom and server PSUs. IC Role / Device Role / Timing Role: Digitally adjustable upper/lower resistor in feedback network, replacing mechanical trimpots. Use Value: Non-volatile storage retains trim setting across power cycles; ±4 ppm/°C ratiometric tempco ensures stable regulation over ambient range. |
Use Scenario: Implementing software-controlled volume attenuation in professional audio DAC output stages. IC Role / Device Role / Timing Role: Voltage-divider between DAC output and line driver input, with wiper driving high-Z op-amp buffer. Use Value: 70 Ω typical wiper resistance minimizes THD degradation; monotonic response prevents audible "zipper noise" during level sweeps. |
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-2.5 | 2.5 kΩ, 256-tap, SPI interface, –40°C to +105°C, 10-lead MSOP | Requires SPI host instead of I²C; higher wiper resistance (120 Ω typ); no hardware WP pin | Choose when existing design uses SPI peripherals and board layout accommodates larger MSOP footprint. |
| MCP45HV51-2.5M | 2.5 kΩ, 256-tap, I²C interface, –40°C to +125°C, 8-lead TDFN, 12 V tolerant | Supports 12 V DCP voltage range (vs. 5.5 V max for ISL95810UART8Z-T); higher wiper resistance (100 Ω typ) | Prefer for high-voltage sensor interfaces or designs needing >5.5 V across RH–RL; verify I²C timing compatibility at target VCC. |
Compared with AD5170BRMZ-2.5 and MCP45HV51-2.5M, the ISL95810UART8Z-T offers lower wiper resistance and integrated hardware write protection-advantageous for low-noise, safety-critical analog trimming where I²C is already present and 5.5 V DCP compliance suffices.
Availability
ISL95810UART8Z-T is available at Aetrix Electronics and suitable for motor control feedback tuning, programmable sensor biasing, power supply trim & calibration, and audio signal level control requiring stable component supply across extended temperature environments.
Supply support for ISL95810UART8Z-T 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 applications.
The ISL95810 family is designed for precision analog parameter adjustment in space-constrained systems, emphasizing low-noise DCP performance, non-volatile configuration retention, and robust I²C interoperability.
FAQ
What is the default wiper position after power-up for the ISL95810UART8Z-T?
The ISL95810UART8Z-T powers up with the wiper set to mid-scale (0x80 = decimal 128) by default, as the factory-programmed Initial Value Register (IVR) contains this value and is automatically loaded into the volatile Wiper Register (WR) during power-on recall. This behavior is guaranteed across all operating temperatures from –40°C to +105°C.
Does the ISL95810UART8Z-T support both voltage-divider and rheostat configurations?
Yes, the ISL95810UART8Z-T supports both configurations: as a 3-terminal voltage divider (RH–RW–RL) for adjustable reference generation, and as a 2-terminal rheostat (RW–RL or RW–RH) for variable resistance applications like current limiting or gain control. Monotonicity and linearity specs are separately validated for each mode per the FN8090 datasheet.
What is the maximum I²C clock frequency supported by the ISL95810UART8Z-T?
The ISL95810UART8Z-T supports standard-mode I²C operation up to 400 kHz, as specified in the Serial Interface Specifications section of FN8090 Rev. 3.01. Timing parameters including tLOW (1300 ns), tHIGH (600 ns), and tSU:STA (600 ns) are fully characterized at this rate, ensuring reliable communication with common microcontroller I²C peripherals.
How does hardware write protection work on the ISL95810UART8Z-T?
The ISL95810UART8Z-T uses an active-low WP pin: when pulled low, it blocks all I²C write operations-including volatile WR updates and non-volatile IVR programming-regardless of command sequence. The device ignores incoming data bytes and returns to standby mode, providing fail-safe prevention of unintended configuration changes in operational systems.
Is the ISL95810UART8Z-T RoHS compliant and lead-free?
Yes, the ISL95810UART8Z-T is RoHS compliant and supplied in Pb-free plus anneal packaging, featuring 100% matte tin plate termination finish compatible with both SnPb and Pb-free soldering processes. Its MSL rating and reflow profile comply with IPC/JEDEC J-STD-020 standards per the ordering information table in FN8090 Rev. 3.01.
ISL95810UART8Z-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 1
- Number of Taps:
- 256
- Resistance (Ohms):
- 50k
- Interface:
- I2C
- Memory Type:
- Non-Volatile
- Voltage - Supply:
- 2.7V ~ 5.5V
- Features:
- -
- Tolerance:
- ±20%
- Temperature Coefficient (Typ):
- ±45ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-TDFN (3x3)
- Operating Temperature:
- -40°C ~ 105°C
- Resistance - Wiper (Ohms) (Typ):
- 70
ISL95810UART8Z-T FAQ
1.How can I place an order for ISL95810UART8Z-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95810UART8Z-T 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 ISL95810UART8Z-T reliable?
The price and inventory of ISL95810UART8Z-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95810UART8Z-T is usually 5 days.
3.What payment methods are accepted for ISL95810UART8Z-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95810UART8Z-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95810UART8Z-T?
ISL95810UART8Z-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95810UART8Z-T 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 ISL95810UART8Z-T?
For technical support, including ISL95810UART8Z-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95810UART8Z-T requirements.
6.How does Aetrix verify that ISL95810UART8Z-T is sourced from the original manufacturer or authorized distributors?
All ISL95810UART8Z-T 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 ISL95810UART8Z-T meets industry standards.
7.What is the process for return or replacement of ISL95810UART8Z-T?
All ISL95810UART8Z-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL95810UART8Z-T, 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 ISL95810UART8Z-T part is unused and in its original packaging.
Return procedure for ISL95810UART8Z-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL95810UART8Z-T Tags
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