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Renesas ISL90810UAU8Z
- Part No.:
- ISL90810UAU8Z
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ISL90810UAU8Z.pdf
- Description:
- IC DGTL POT 50KOHM 256TAP 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,051
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Product details
Overview
ISL90810UAU8Z from Intersil is a single-channel, digitally controlled potentiometer (XDCP™) with 256 taps, I²C interface, 50kΩ total resistance, ±0.5 LSB DNL (U-grade), and operation across –40°C to +105°C. It functions as a precision voltage divider or rheostat in analog signal conditioning circuits for industrial sensor calibration and power supply feedback loops.
For engineers reviewing the ISL90810UAU8Z datasheet, ISL90810UAU8Z pinout, ISL90810UAU8Z application, or ISL90810UAU8Z equivalent, this page delivers verified electrical specs, true pin functionality, real-world use cases, and validated alternative options - all tied explicitly to the ISL90810UAU8Z-TK ordering variant.
Technical Context
The ISL90810UAU8Z implements a monolithic CMOS resistor ladder with CMOS switch matrix, controlled via an 8-bit volatile Wiper Register (WR) accessible only through its dedicated I²C slave interface (7-bit ID 0x50). Its wiper defaults to mid-scale (128) at power-on, ensuring predictable startup behavior without external initialization.
It supports both voltage divider mode (RH–RL–RW) and rheostat mode (RW–RL or RW–RH), with ratiometric temperature coefficient of ±4 ppm/°C and resistance TC of ±35 ppm/°C over –40°C to +105°C. Standby current is ≤5 µA at +105°C and 5.5V, enabling low-power system calibration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Resistance | 50kΩ - sets full-scale range for voltage division or adjustable gain in op-amp feedback networks. |
| Resolution | 256 taps (0.4% step resolution) - enables fine-grained analog tuning with 8-bit digital control. |
| DNL (U grade) | ±0.5 LSB - guarantees monotonicity and prevents output glitches during tap transitions in closed-loop systems. |
| Wiper Resistance | 70Ω typical @ 3.3V - minimizes loading error when used as voltage divider output node. |
| Supply Range | 2.7V to 5.5V - interoperable with 3.3V and 5V logic domains without level-shifting. |
| Standby Current | ≤5 µA @ +105°C - suitable for battery-backed or always-on calibration circuits. |
| I²C Speed | 400 kHz - compatible with standard-mode I²C controllers without timing margin concerns. |
Pinout & Package
ISL90810UAU8Z is housed in an 8-lead MSOP (Pb-free, RoHS-compliant) package per drawing M8.118, with 3.0 mm × 3.0 mm body, 0.65 mm lead pitch, 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 PCB layout best practices; no electrical function. |
| 2 SCL | I²C clock input | Accepts 400 kHz master clock; internal hysteresis (0.05×VCC) rejects noise on shared bus lines. |
| 3 SDA | I²C bidirectional data | Open-drain I/O with 0.4 V VOL @ 4 mA sink - requires external pull-up (1–20 kΩ depending on bus capacitance). |
| 4 GND | Analog/digital ground reference | Common return for DCP resistive network and I²C interface; must be low-impedance path to system ground plane. |
| 5 RW | Wiper terminal | Output node of DCP - connects to op-amp input or ADC reference point; 70Ω typical series resistance affects high-frequency response. |
| 6 RL | Low-end terminal | Fixed end of resistor string - tied to GND or negative rail in voltage divider configurations. |
| 7 RH | High-end terminal | Fixed end of resistor string - tied to VCC or positive rail; defines upper bound of adjustable voltage range. |
| 8 VCC | Power supply | Supplies both DCP core and I²C interface; decoupling capacitor (0.1 µF ceramic) required within 5 mm. |
Key Features
| Feature | Design Value |
|---|---|
| Power-on wiper preset | Defaults to tap 128 (mid-scale) - eliminates startup uncertainty in feedback loops without firmware initialization. |
| Volatile wiper register | 8-bit WR directly readable/writable via I²C - enables dynamic recalibration during runtime without nonvolatile memory wear-out. |
| Low wiper resistance | 70Ω typical @ 3.3V - reduces voltage error in high-impedance sensing nodes and improves linearity in precision dividers. |
| Ratiometric tempco | ±4 ppm/°C - maintains stable voltage division ratio across temperature, critical for sensor offset trimming. |
| Industrial temp range | –40°C to +105°C - qualified for under-hood automotive modules and industrial PLC analog I/O stages. |
Applications
| Temperature Sensor Offset Calibration | Programmable Power Supply Feedback |
|---|---|
Use Scenario: Compensating thermistor or RTD amplifier offset drift across –40°C to +105°C ambient. IC Role / Device Role / Timing Role: Voltage divider setting reference bias point for instrumentation amplifier input stage. Use Value: ±0.5 LSB DNL and ±4 ppm/°C ratiometric TC ensure <±1 mV drift over full temperature range at 3.3V supply. |
Use Scenario: Adjusting output voltage of isolated DC-DC converter via optocoupler feedback loop. IC Role / Device Role / Timing Role: Rheostat-mode programmable resistor replacing mechanical trimpot in secondary-side regulation. Use Value: 50kΩ total resistance matches standard optocoupler CTR design targets; 400 kHz I²C allows remote reconfiguration without board access. |
| Laser Diode Bias Control | Audio Signal Level Adjustment |
Use Scenario: Fine-tuning constant-current source for telecom laser diode driver ICs. IC Role / Device Role / Timing Role: Precision rheostat in emitter-degeneration path of bipolar current mirror. Use Value: 70Ω wiper resistance minimizes added noise and thermal drift in µA-level bias currents. |
Use Scenario: Digital replacement for analog volume control in professional audio mixer channel strips. IC Role / Device Role / Timing Role: Voltage divider feeding op-amp inverting input to set gain attenuation. Use Value: 256-tap resolution provides smooth, glitch-free level changes matching human auditory perception thresholds. |
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, I²C, but ±1 LSB DNL (vs. ±0.5 LSB for ISL90810UAU8Z); higher 100 µA max ICC1. | Qualified only to +85°C industrial range (vs. +105°C automotive-grade ISL90810UAU8Z). | Select AD5170BRMZ-50 if legacy ADI ecosystem integration is prioritized and extended temperature is not required. |
| MCP4018T-E/OT | 50kΩ, 128-tap (not 256), I²C, ±1.5 LSB DNL, 10 µA standby current - lower resolution and looser linearity. | Only rated to +85°C; lacks ratiometric tempco spec; no guaranteed mid-scale power-on default. | Choose MCP4018T-E/OT only for cost-sensitive, non-critical bias trimming where 128-step granularity suffices. |
Compared with AD5170BRMZ-50 and MCP4018T-E/OT, the ISL90810UAU8Z delivers superior DNL performance and extended temperature qualification - making it the preferred choice for automotive sensor calibration and industrial power supply feedback where monotonicity and thermal stability are non-negotiable.
Availability
ISL90810UAU8Z is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supply feedback, laser diode bias control, and audio signal level adjustment requiring stable component supply across extended temperature ranges.
Supply support for ISL90810UAU8Z 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
Intersil Corporation (now part of Renesas Electronics) designs precision analog and power management ICs, emphasizing low-noise, high-reliability performance for industrial and automotive systems.
The ISL90810 series was developed specifically for digitally programmable analog trimming in harsh-environment applications - delivering guaranteed monotonicity, mid-scale power-on reset, and automotive-grade temperature resilience in compact MSOP packaging.
FAQ
What is the power-on behavior of the ISL90810UAU8Z?
The ISL90810UAU8Z initializes its wiper register to 0x80 (128 decimal) at power-on, placing the RW terminal precisely at mid-scale between RH and RL. This behavior is guaranteed across the full –40°C to +105°C operating range and requires no external configuration or I²C command, ensuring deterministic startup in safety-critical feedback paths.
Does the ISL90810UAU8Z support nonvolatile storage of wiper position?
No, the ISL90810UAU8Z uses a volatile wiper register only. Wiper position is lost upon power removal and resets to mid-scale (128) at next power-up. For nonvolatile retention, external microcontroller firmware must reprogram the register after each power cycle - a deliberate design choice to avoid EEPROM wear-out in high-reconfiguration scenarios.
What is the maximum allowable voltage across RH and RL terminals of the ISL90810UAU8Z?
The absolute maximum voltage between RH and RL is limited by the VCC rating: –0.3V to VCC. Since VCC max is +6V, the maximum end-to-end voltage is 6.3V. Exceeding this risks permanent damage; for 50kΩ operation at 5.5V supply, power dissipation remains safely below the 5 mW rating even at full-scale wiper position.
Can the ISL90810UAU8Z be used in rheostat mode with only two terminals connected?
Yes, the ISL90810UAU8Z supports true rheostat operation: connect RW and RL (or RW and RH) while leaving the third terminal unconnected. In this mode, resistance varies from near-zero (tap 0) to 50kΩ (tap 255), with RINL ≤±1 MI and RDNL ≤±0.5 MI - validated in datasheet Figure 7 and Table specifications for U-grade devices.
Is the ISL90810UAU8Z pin-compatible with other members of the ISL90810 family?
Yes, all ISL90810 variants (e.g., ISL90810WAU8Z, ISL90810UIU8Z) share identical 8-lead MSOP packaging and pinout. The ISL90810UAU8Z differs only in total resistance (50kΩ) and temperature grade (–40°C to +105°C); electrical pin functions and I²C protocol are fully consistent across the family.
ISL90810UAU8Z 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 ~ 105°C
- Resistance - Wiper (Ohms) (Typ):
- 70
ISL90810UAU8Z FAQ
1.How can I place an order for ISL90810UAU8Z through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL90810UAU8Z 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 ISL90810UAU8Z reliable?
The price and inventory of ISL90810UAU8Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL90810UAU8Z is usually 5 days.
3.What payment methods are accepted for ISL90810UAU8Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL90810UAU8Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL90810UAU8Z?
ISL90810UAU8Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL90810UAU8Z 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 ISL90810UAU8Z?
For technical support, including ISL90810UAU8Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL90810UAU8Z requirements.
6.How does Aetrix verify that ISL90810UAU8Z is sourced from the original manufacturer or authorized distributors?
All ISL90810UAU8Z 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 ISL90810UAU8Z meets industry standards.
7.What is the process for return or replacement of ISL90810UAU8Z?
All ISL90810UAU8Z units undergo pre-shipment inspection (PSI). If there is an issue with ISL90810UAU8Z, 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 ISL90810UAU8Z part is unused and in its original packaging.
Return procedure for ISL90810UAU8Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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