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Renesas ISL95810UIU8Z-T
- Part No.:
- ISL95810UIU8Z-T
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ISL95810UIU8Z-T.pdf
- Description:
- IC DGTL POT 50KOHM 256TAP 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:18,906
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Product details
Overview
ISL95810UIU8Z-T from Renesas Electronics is a single-channel, digitally controlled potentiometer (XDCP™) implemented in monolithic CMOS, offering 256-tap resolution (0.4%), I²C interface, 50kΩ total resistance, 70Ω typical wiper resistance at 3.3V, and non-volatile initial value storage. It functions as a precision 3-terminal potentiometer or 2-terminal rheostat in analog signal conditioning circuits requiring stable, programmable resistance.
For engineers reviewing the ISL95810UIU8Z-T datasheet, ISL95810UIU8Z-T pinout, ISL95810UIU8Z-T application, or ISL95810UIU8Z-T equivalent, this page delivers verified technical context, exact package mapping (8-lead MSOP), confirmed I²C timing compliance (400kHz), real-world wiper response time (1µs), and validated alternatives for industrial voltage divider and gain-setting designs.
Technical Context
The ISL95810UIU8Z-T integrates a resistor ladder with CMOS switch matrix controlled by an 8-bit volatile Wiper Register (WR), where WR=0x00 places RW at RL and WR=0xFF places RW at RH. At power-up, it recalls its factory-programmed IVR value (0x80) into WR, establishing mid-scale default operation.
Its I²C slave interface supports standard-mode (400kHz) communication with hardware write protection via active-low WP pin. The device features dual-register access control (address 0x02) to selectively read/write volatile WR or non-volatile IVR, and guarantees monotonicity in both voltage-divider and rheostat modes across –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Resistance | 50kΩ ±20% - defines full-scale analog range for gain/offset adjustment in op-amp feedback networks. |
| Resolution | 256 taps (0.4%) - enables fine-grained calibration of sensor biasing or reference voltage division. |
| Wiper Resistance | 70Ω typical at 3.3V - minimizes insertion error in low-impedance signal paths and preserves linearity. |
| I²C Clock Frequency | 400kHz - supports fast host-controlled reconfiguration without bus contention in multi-device systems. |
| Standby Current | 5µA max at 5.5V - enables low-power operation in battery-backed or energy-conscious embedded systems. |
| Power Supply Range | 2.7V to 5.5V - ensures compatibility with both 3.3V and 5V logic domains and mixed-voltage PCBs. |
| Temperature Range | –40°C to +85°C - qualified for industrial-grade operation in motor drives, PLC modules, and instrumentation. |
Pinout & Package
ISL95810UIU8Z-T is housed in an 8-lead MSOP (Mini Small Outline Plastic) package, 3.0mm × 3.0mm footprint, 0.65mm lead pitch, RoHS-compliant, with exposed pad not present. Pin 1 marked by notch or dot; thermal resistance θJA = 151°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (WP) | Hardware Write Protect | Active-low input that disables all I²C write operations when pulled LOW-critical for field reliability during firmware updates. |
| 2 (SCL) | I²C Clock Input | Master-generated clock synchronizing all serial transfers; requires external pull-up and meets 400kHz timing specs (tLOW ≥1300ns). |
| 3 (SDA) | I²C Data I/O | Bidirectional open-drain node supporting ACK/NACK handshake; capacitance ≤10pF ensures clean rise/fall times. |
| 4 (GND) | Analog/Digital Ground | Common reference for DCP terminals and digital interface-must be low-impedance to minimize noise coupling into wiper path. |
| 5 (RW) | Wiper Terminal | Output node whose voltage/resistance varies with WR setting; 70Ω typical RW limits loading effects on downstream stages. |
| 6 (RL) | Low Terminal | Fixed end of resistor string; tied to GND in voltage-divider mode or used as one end in rheostat configuration. |
| 7 (RH) | High Terminal | Fixed end of resistor string; connected to VCC or reference voltage in divider mode; defines upper resistance limit. |
| 8 (VCC) | Power Supply | Supplies core logic and DCP array; must be bypassed with ≥0.1µF ceramic capacitor near pin to suppress switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Non-volatile Initial Value Register (IVR) | Factory-programmed to 0x80 (mid-scale); recalled at every power-on-ensures deterministic startup behavior without host initialization. |
| Monotonic Performance | DNL ≤ ±0.5 LSB in voltage-divider mode and ≤ ±0.5 MI in rheostat mode-guarantees no code-to-code glitches in closed-loop control loops. |
| Ratiometric Tempco | ±4 ppm/°C over tap positions 16–240 - maintains precise voltage division ratio across temperature in sensor front-ends. |
| Endurance & Retention | 200,000 write cycles per register; 50-year data retention at T ≤ +75°C-supports long-life calibration storage in medical or test equipment. |
| Low-Leakage DCP Pins | ≤1 µA leakage (GND to VCC) - preserves high-impedance node integrity in precision measurement circuits. |
Applications
| Industrial Sensor Calibration | Programmable Gain Amplifier |
|---|---|
|
Use Scenario: Calibrating offset and span of RTD or thermocouple signal conditioners in PLC analog input modules. IC Role / Device Role / Timing Role: Acts as a precision, non-volatile voltage divider between reference and sensor output to trim zero/gain errors. Use Value: Eliminates manual trimpots and enables automated factory calibration with 0.4% resolution and guaranteed monotonicity. |
Use Scenario: Setting closed-loop gain in instrumentation amplifiers for variable-range data acquisition systems. IC Role / Device Role / Timing Role: Configures feedback resistance in op-amp circuits; wiper position determines gain ratio in real time. Use Value: Enables software-selectable gain steps (e.g., ×1, ×10, ×100) without relays or discrete resistor arrays. |
| LCD Panel Brightness Control | Audio Volume Adjustment |
|
Use Scenario: Adjusting backlight LED current in industrial HMI displays using PWM-modulated constant-current drivers. IC Role / Device Role / Timing Role: Functions as a 2-terminal rheostat in series with LED cathode to set average current level. Use Value: Provides smooth, flicker-free dimming with 256-step granularity and no mechanical wear. |
Use Scenario: Replacing mechanical potentiometers in professional audio mixers for channel-level attenuation. IC Role / Device Role / Timing Role: Serves as a low-noise, low-distortion voltage divider in analog signal path before ADC or amplifier stage. Use Value: Delivers consistent channel matching, eliminates scratch noise, and supports remote digital control via I²C. |
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-50 | 256-tap, 50kΩ, SPI interface, 10ppm/°C tempco, 45Ω wiper R, 10µA standby | Requires SPI host instead of I²C; higher tempco reduces voltage-divider stability over temperature | Choose when existing design uses SPI peripherals and lower wiper resistance is critical for <100Ω source impedance. |
| MCP45HV51-503E/MS | 256-tap, 50kΩ, I²C interface, 100Ω wiper R, 10µA standby, 12V tolerant pins | Higher wiper resistance increases gain error in low-impedance dividers; supports 12V DCP operation beyond ISL95810's 5.5V limit | Choose for high-voltage analog rails (>5.5V) where ISL95810UIU8Z-T cannot operate, accepting higher wiper R penalty. |
Compared with AD5175BRMZ-50 and MCP45HV51-503E/MS, the ISL95810UIU8Z-T offers superior ratiometric temperature coefficient (±4 ppm/°C vs. ±10 ppm/°C), lower wiper resistance (70Ω vs. ≥100Ω), and tighter DNL (±0.5 LSB), making it optimal for precision voltage division where thermal drift and linearity are critical.
Availability
ISL95810UIU8Z-T is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable gain amplifiers, LCD backlight control, and audio volume adjustment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL95810UIU8Z-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 SoC solutions for automotive, industrial, and IoT markets with strong IP in mixed-signal and embedded processing.
The ISL95810UIU8Z-T belongs to Renesas' XDCP™ (eXternally Digitally Controlled Potentiometer) family, designed specifically for replacing mechanical potentiometers in high-reliability industrial and instrumentation applications demanding non-volatility, monotonicity, and low-noise analog performance.
FAQ
What is the default wiper position of the ISL95810UIU8Z-T at power-up?
The ISL95810UIU8Z-T powers up with its volatile Wiper Register (WR) initialized to 0x80 (128 decimal), placing the wiper at mid-scale between RH and RL. This value is loaded from the factory-programmed non-volatile Initial Value Register (IVR), ensuring repeatable, deterministic startup behavior without host intervention. The IVR retains this value for 50 years at ≤+75°C.
Does the ISL95810UIU8Z-T support both potentiometer and rheostat configurations?
Yes, the ISL95810UIU8Z-T supports both configurations. As a 3-terminal potentiometer, RH and RL connect to fixed voltages (e.g., VCC and GND) while RW provides adjustable output. As a 2-terminal rheostat, either RH or RL is left unconnected, and RW+RL (or RW+RH) forms a variable resistance. Both modes maintain monotonicity and specified INL/DNL performance per datasheet Figures 4–9.
How does the WP pin affect write operations on the ISL95810UIU8Z-T?
The WP (Write Protect) pin on the ISL95810UIU8Z-T is active-low: when pulled LOW, it disables all I²C write operations-including volatile WR updates and non-volatile IVR writes-and forces the device into standby mode. When WP is HIGH, writes proceed normally. This hardware lock prevents accidental overwrites during system operation or firmware updates, enhancing field reliability.
What is the maximum allowable capacitive load on the SDA and SCL lines for reliable I²C operation with the ISL95810UIU8Z-T?
The ISL95810UIU8Z-T specifies a maximum total bus capacitance (Cb) of 400pF for SDA and SCL lines. With Cb = 400pF, the recommended off-chip pull-up resistor is ~2–2.5kΩ to meet rise/fall time requirements (tR/tF ≤250ns). Exceeding 400pF risks violating I²C timing specs (e.g., tBUF, tSU:STA), leading to communication failures-designers must include PCB trace and slave pin capacitance in total Cb.
Can the ISL95810UIU8Z-T be used in a 5V system with 3.3V logic-level microcontrollers?
Yes, the ISL95810UIU8Z-T operates from 2.7V to 5.5V and tolerates I²C input voltages from 0.3×VCC to 0.7×VCC. When VCC = 5V, VIH = 3.5V min and VIL = 1.5V max-compatible with 3.3V GPIO outputs. Use 3.3V-compatible pull-ups (e.g., 2.2kΩ) and ensure SDA/SCL do not exceed VCC+0.3V. No level shifter is required for standard 3.3V MCU interfacing.
ISL95810UIU8Z-T 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:
- 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-MSOP
- Operating Temperature:
- -40°C ~ 85°C
- Resistance - Wiper (Ohms) (Typ):
- 70
ISL95810UIU8Z-T FAQ
1.How can I place an order for ISL95810UIU8Z-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95810UIU8Z-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 ISL95810UIU8Z-T reliable?
The price and inventory of ISL95810UIU8Z-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95810UIU8Z-T is usually 5 days.
3.What payment methods are accepted for ISL95810UIU8Z-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95810UIU8Z-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95810UIU8Z-T?
ISL95810UIU8Z-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95810UIU8Z-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 ISL95810UIU8Z-T?
For technical support, including ISL95810UIU8Z-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95810UIU8Z-T requirements.
6.How does Aetrix verify that ISL95810UIU8Z-T is sourced from the original manufacturer or authorized distributors?
All ISL95810UIU8Z-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 ISL95810UIU8Z-T meets industry standards.
7.What is the process for return or replacement of ISL95810UIU8Z-T?
All ISL95810UIU8Z-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL95810UIU8Z-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 ISL95810UIU8Z-T part is unused and in its original packaging.
Return procedure for ISL95810UIU8Z-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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