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Renesas ISL22414WMU10Z-T7A
- Part No.:
- ISL22414WMU10Z-T7A
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ISL22414WMU10Z-T7A.pdf
- Description:
- IC DGTL POT 10KOHM 256TAP 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,075
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Product details
Overview
ISL22414WMU10Z-T7A from Renesas (formerly Intersil) is a single-channel, 256-tap digitally controlled potentiometer (XDCP™) with SPI interface, 10kΩ end-to-end resistance, military-grade temperature range (–55°C to +125°C), and dual-supply operation (VCC = 2.25V to 5.5V, V– = –2.25V to –5.5V). It integrates non-volatile Initial Value Register (IVR), volatile Wiper Register (WR), and 14 general-purpose EEPROM registers for configuration storage in precision analog trimming applications.
For engineers reviewing the ISL22414WMU10Z-T7A datasheet, ISL22414WMU10Z-T7A pinout, ISL22414WMU10Z-T7A application, or ISL22414WMU10Z-T7A equivalent, this device supports voltage divider and rheostat modes, offers ±1.5 LSB integral non-linearity (INL) over full tap range, features <2.5µA standby current, and enables power-up wiper recall-critical for bias calibration in high-reliability instrumentation and aerospace signal conditioning circuits.
Technical Context
The ISL22414WMU10Z-T7A implements a monolithic CMOS resistor ladder with CMOS switch matrix, supporting true make-before-break wiper transitions and configurable push-pull or open-drain SDO output via ACR[1]. Its dual-supply architecture allows bipolar DCP terminal voltage swing between V– and VCC, enabling use in AC-coupled gain control and offset adjustment where ground-referenced pots fail.
Operation relies on an 8-bit volatile WR register controlling wiper position and an 8-bit non-volatile IVR storing power-up default; both are accessible via SPI Mode 0 (CPOL=0, CPHA=0) with instruction-based read/write sequences. The device supports daisy-chain configuration for multi-channel synchronization without additional chip select lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Resistance | 10kΩ - defines maximum end-to-end impedance for gain/attenuation scaling in voltage divider mode. |
| Taps / Resolution | 256 taps - provides 8-bit granularity (≈0.39% step resolution) for fine analog parameter tuning. |
| INL (Voltage Divider) | ±1.5 LSB max - ensures monotonicity and predictable transfer function across all 256 positions at –55°C to +125°C. |
| Wiper Resistance | 70Ω typical - minimizes insertion error in low-impedance feedback paths (e.g., op-amp gain setting). |
| Standby Current | <2.5µA at +125°C - enables ultra-low-power retention in battery-backed or energy-constrained systems. |
| Non-volatile Endurance | 1,000,000 write cycles - supports field recalibration and long-term configuration updates without wear-out risk. |
| Temperature Range | –55°C to +125°C - qualified for military/aerospace platforms requiring extended thermal robustness. |
Pinout & Package
ISL22414WMU10Z-T7A is housed in a Pb-free, RoHS-compliant 10-lead MSOP package (M10.118), optimized for high-density PCB layouts and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SCK | SPI clock input | Accepts master-generated clock up to 5MHz; timing-critical for reliable serial command execution. |
| 2 SDO | SPI data output | Configurable as push-pull or open-drain; outputs register reads during third/fourth SPI byte transfers. |
| 3 SDI | SPI data input | Receives instruction and data bytes on rising SCK edge; requires setup/hold compliance per datasheet. |
| 4 CS | Chip select (active low) | Enables SPI interface and triggers internal non-volatile write cycle on rising edge; must be held low during transaction. |
| 5 V– | Negative supply rail | Supports bipolar operation down to –5.5V; referenced to GND, not VCC. |
| 6 GND | Signal ground reference | Common return for digital logic and analog DCP terminals; separation from power ground recommended. |
| 7 RL | DCP low terminal | Fixed end of resistor ladder; connects to lowest potential node in voltage divider or rheostat configurations. |
| 8 RW | DCP wiper terminal | Movable contact point; output node for adjustable voltage division or variable resistance between RW–RL/RW–RH. |
| 9 RH | DCP high terminal | Fixed end of resistor ladder; connects to highest potential node (e.g., VCC or signal source). |
| 10 VCC | Positive supply rail | Powers digital core and analog switches; operates from 2.25V to 5.5V; independent of V– rail. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-supply DCP operation | Enables ±5.5V bipolar terminal voltage range (V– to VCC), supporting AC-coupled signal path trimming without level-shifting. |
| Power-up wiper recall | Automatically loads IVR value into WR at power-on (VCC ≥ 1.9V), ensuring repeatable startup state without host intervention. |
| 14 GP non-volatile registers | Stores calibration coefficients, lookup tables, or system-specific settings across power cycles-extending configurability beyond wiper position. |
| Shutdown mode | ACR[6]=0 forces DCP into open-circuit RH–RL and shorts RW to RL, reducing leakage and isolating analog path during sleep. |
| Daisy-chain SPI support | Allows cascading multiple ISL22414 devices on single CS/SCK lines, enabling synchronized wiper updates across multi-channel systems. |
Applications
| Instrumentation Calibration | Aerospace Sensor Conditioning |
|---|---|
Use Scenario: Precision zero/gain adjustment in flight-control analog front-ends exposed to extreme thermal cycling. IC Role / Device Role / Timing Role: Digitally programmable trim element replacing mechanical potentiometers in DC-coupled amplifier feedback networks. Use Value: Eliminates manual calibration labor; maintains ±1.5 LSB INL over –55°C to +125°C; non-volatile IVR preserves factory-trimmed offsets after power loss. |
Use Scenario: Bias voltage setting for radiation-hardened pressure transducers in satellite telemetry subsystems. IC Role / Device Role / Timing Role: High-reliability, low-drift resistance element for sensor excitation and offset nulling under vacuum and thermal stress. Use Value: 50-year data retention at ≤+55°C ensures mission-long calibration stability; 1M-cycle endurance supports in-orbit recalibration. |
| Medical Imaging Signal Chain | Industrial Process Control |
Use Scenario: Dynamic gain control in ultrasound receive-path amplifiers requiring sub-LSB repeatability across patient scans. IC Role / Device Role / Timing Role: SPI-configurable voltage divider for real-time AGC loop adaptation in low-noise analog signal chains. Use Value: 70Ω wiper resistance minimizes noise contribution; <2.5µA standby current extends battery life in portable diagnostic equipment. |
Use Scenario: Programmable threshold setting for safety-critical temperature monitoring in nuclear plant coolant systems. IC Role / Device Role / Timing Role: Fail-safe analog reference adjuster with shutdown mode isolation during fault conditions. Use Value: Shutdown mode electrically disconnects RH–RL while shorting RW to RL, preventing erroneous bias injection during system faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digitally controlled potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL22414TFU10Z-TK | Same 10kΩ resistance and 256-tap architecture, but rated for industrial (–40°C to +125°C) not military temperature range; identical pinout and SPI protocol. | Lacks extended –55°C operation; suitable for commercial/industrial environments where military spec is unnecessary. | Select when full military temp range is not required and cost optimization is prioritized. |
| AD5170BRMZ-10 | 10kΩ, 256-tap I²C-interface DCP; no dual-supply support; ±0.5 LSB INL; 20-year EEPROM retention vs. 50 years. | Requires I²C bus instead of SPI; cannot support bipolar analog rails; lower temperature rating (–40°C to +125°C). | Choose only if I²C infrastructure exists and bipolar operation is not needed; verify compatibility with existing firmware stack. |
Compared with ISL22414WMU10Z-T7A, ISL22414TFU10Z-TK sacrifices military temperature capability for cost efficiency, while AD5170BRMZ-10 trades SPI/dual-supply flexibility for I²C simplicity and slightly tighter linearity-neither offers direct drop-in replacement due to temperature or interface mismatch.
Availability
ISL22414WMU10Z-T7A is available at Aetrix Electronics and suitable for aerospace instrumentation, medical imaging signal chains, industrial process control, and high-reliability sensor conditioning requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for ISL22414WMU10Z-T7A 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 and continues to support its precision analog portfolio, including digitally controlled potentiometers for high-integrity applications.
The ISL22414 series was designed specifically for replacing mechanical potentiometers in harsh-environment analog trimming tasks-emphasizing non-volatile configuration retention, wide temperature operation, and SPI-controlled programmability.
FAQ
What is the operating temperature range for the ISL22414WMU10Z-T7A?
The ISL22414WMU10Z-T7A is specified for the military temperature range of –55°C to +125°C, validated across all electrical parameters including INL, wiper resistance, and non-volatile recall functionality. This exceeds standard industrial grade and supports deployment in avionics, downhole tools, and space-qualified systems where thermal extremes are routine.
Does the ISL22414WMU10Z-T7A support bipolar analog signal paths?
Yes-the ISL22414WMU10Z-T7A supports true bipolar operation via separate VCC (2.25V to 5.5V) and V– (–2.25V to –5.5V) supplies, allowing DCP terminals RH, RL, and RW to swing across the full range from V– to VCC. This enables AC-coupled gain control and offset adjustment without external level-shifting circuitry.
How does the power-up wiper recall function work on the ISL22414WMU10Z-T7A?
At power-on, when VCC reaches ≥1.9V, the ISL22414WMU10Z-T7A automatically loads the stored value from its non-volatile Initial Value Register (IVR) into the volatile Wiper Register (WR), positioning the wiper accordingly. This occurs within 5ms of VCC crossing the POR threshold and requires no host SPI command.
Can multiple ISL22414WMU10Z-T7A devices be controlled using a single SPI bus?
Yes-the ISL22414WMU10Z-T7A supports daisy-chain configuration: connect SDO of one device to SDI of the next, with shared CS and SCK lines. Commands propagate serially, enabling synchronized wiper updates across all devices in the chain without additional GPIO resources.
What is the maximum SPI clock frequency supported by the ISL22414WMU10Z-T7A?
The ISL22414WMU10Z-T7A supports SPI clock frequencies up to 5MHz, with guaranteed timing margins for setup/hold, lead/lag, and cycle times. At 5MHz, the minimum clock cycle time is 200ns, and all interface parameters-including tSU (50ns), tH (50ns), and tRO/tFO (60ns)-are met under worst-case voltage and temperature conditions.
ISL22414WMU10Z-T7A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 10-TFSOP, 10-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:
- SPI
- Memory Type:
- Non-Volatile
- Voltage - Supply:
- ±2.25V ~ 5.5V
- Features:
- -
- Tolerance:
- ±20%
- Temperature Coefficient (Typ):
- 150ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 10-MSOP
- Operating Temperature:
- -55°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ):
- 70
ISL22414WMU10Z-T7A FAQ
1.How can I place an order for ISL22414WMU10Z-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL22414WMU10Z-T7A 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 ISL22414WMU10Z-T7A reliable?
The price and inventory of ISL22414WMU10Z-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL22414WMU10Z-T7A is usually 5 days.
3.What payment methods are accepted for ISL22414WMU10Z-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL22414WMU10Z-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL22414WMU10Z-T7A?
ISL22414WMU10Z-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL22414WMU10Z-T7A 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 ISL22414WMU10Z-T7A?
For technical support, including ISL22414WMU10Z-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL22414WMU10Z-T7A requirements.
6.How does Aetrix verify that ISL22414WMU10Z-T7A is sourced from the original manufacturer or authorized distributors?
All ISL22414WMU10Z-T7A 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 ISL22414WMU10Z-T7A meets industry standards.
7.What is the process for return or replacement of ISL22414WMU10Z-T7A?
All ISL22414WMU10Z-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL22414WMU10Z-T7A, 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 ISL22414WMU10Z-T7A part is unused and in its original packaging.
Return procedure for ISL22414WMU10Z-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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