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Renesas ISL22424UFR16Z
- Part No.:
- ISL22424UFR16Z
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 16-TFQFN Exposed Pad
- Datasheet:
-
ISL22424UFR16Z.pdf
- Description:
- IC DGTL POT 50KOHM 256TAP 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,980
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Product details
Overview
ISL22424UFR16Z from Renesas (formerly Intersil) is a dual digitally controlled potentiometer (XDCP™) with 256-tap resolution, SPI interface, and non-volatile wiper position storage. It features two independent 50kΩ DCPs, dual supply operation (VCC = 2.25–5.5V, V− = −2.25 to −5.5V), and operates across −40°C to +125°C. It is used in precision analog trimming, programmable gain control, and bipolar signal conditioning circuits.
For engineers reviewing the ISL22424UFR16Z datasheet, ISL22424UFR16Z pinout, ISL22424UFR16Z application, or ISL22424UFR16Z equivalent, key selection considerations include its QFN-16 package, 50kΩ end-to-end resistance, shutdown mode (<4µA), wiper resistance (70Ω typ), and daisy-chain SPI capability for multi-device systems.
Technical Context
The ISL22424UFR16Z integrates two monolithic CMOS DCP arrays with resistor ladders and CMOS switches, each controlled via an 8-bit volatile Wiper Register (WRi) and backed by a non-volatile Initial Value Register (IVRi). Power-up recalls IVRi contents into WRi, ensuring repeatable startup states.
It implements SPI Mode 0 (rising-edge input, falling-edge output), supports daisy-chaining, and includes 13 general-purpose non-volatile registers. The dual-supply architecture enables true bipolar terminal voltage swing (V− to VCC), allowing use in AC-coupled or rail-to-rail analog paths where negative reference potentials are required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Resistance | 50kΩ per DCP - defines full-scale analog range and current-handling capability in voltage divider or rheostat modes. |
| Resolution | 256 taps (8-bit) - provides 0.39% step resolution for fine-grained analog adjustment. |
| Wiper Resistance | 70Ω typical at 1mA - limits insertion error and thermal noise in low-level signal paths. |
| Supply Range | VCC = 2.25–5.5V; V− = −2.25 to −5.5V - enables bipolar operation without external level shifters. |
| Standby Current | <4µA max - supports ultra-low-power system sleep states without losing configuration. |
| Temperature Range | −40°C to +125°C - qualified for under-hood automotive, industrial motor control, and harsh-environment applications. |
| Non-volatile Endurance | 1,000,000 write cycles - ensures long-term reliability in field-programmable calibration systems. |
Pinout & Package
ISL22424UFR16Z is housed in a 16-lead QFN package (4mm × 4mm, L16.4x4A) with exposed die pad internally connected to V−. Thermal land for the EPAD should be connected to the V− plane per Intersil TB389.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | NC | No connection - unused pins; must remain unconnected per datasheet. |
| 4 | V− | Negative power supply - supplies bias for bipolar DCP operation and connects to EPAD. |
| 5 | SDO | SPI serial data output - push-pull or open-drain configurable; outputs read data on SCK falling edge. |
| 6 | SCK | SPI clock input - rising edge clocks data in; falling edge clocks data out (Mode 0). |
| 7 | GND | Digital ground reference - separate from analog ground; ties to system GND plane. |
| 8 | SDI | SPI serial data input - accepts instruction and data bytes on SCK rising edge. |
| 9 | CS | Chip select (active low) - enables SPI communication; rising edge triggers non-volatile write completion. |
| 10 | VCC | Positive power supply - powers logic and DCP array; must ramp ≥0.2 V/ms for reliable POR. |
| 11 | RL1 | Low terminal of DCP1 - fixed end of second potentiometer; referenced to V− in bipolar configurations. |
| 12 | RW1 | Wiper terminal of DCP1 - movable contact; position set by WR1 register; 70Ω typical series resistance. |
| 13 | RH1 | High terminal of DCP1 - fixed end of second potentiometer; referenced to VCC in bipolar configurations. |
| 14 | RL0 | Low terminal of DCP0 - fixed end of first potentiometer; used with RH0/RW0 for independent trimming. |
| 15 | RH0 | High terminal of DCP0 - fixed end of first potentiometer; forms voltage divider with RL0 and RW0. |
| 16 | RW0 | Wiper terminal of DCP0 - primary analog output node; monotonic over all 256 taps with ±0.2 LSB DNL (U option). |
Key Features
| Feature | Design Value |
|---|---|
| Dual 50kΩ DCPs in one QFN-16 | Reduces board space vs. discrete pots or dual TSSOP solutions; eliminates matching drift between separate devices. |
| Non-volatile IVR storage (50-year retention) | Preserves factory or field calibration across power cycles without external EEPROM or battery backup. |
| Shutdown mode (<4µA) | Disables DCP conduction while retaining wiper state; enables dynamic power gating in portable or energy-sensitive systems. |
| Daisy-chain SPI interface | Allows cascading multiple ISL22424 devices on single CS line - simplifies routing and reduces MCU GPIO count. |
| Bipolar supply support (V−/VCC) | Permits true AC signal attenuation and offset control without external op-amp level-shifting circuitry. |
Applications
| Audio Signal Level Control | Programmable Sensor Biasing |
|---|---|
|
Use Scenario: Adjusting gain and offset in analog front-ends for MEMS microphones or piezoelectric sensors operating with bipolar supplies. IC Role / Device Role / Timing Role: Dual DCP acts as digitally tuned voltage divider and DC bias injector; RH0/RL0 set reference, RW0 injects calibrated offset. Use Value: Enables software-defined calibration during production test and field recalibration without hardware modification. |
Use Scenario: Setting precise excitation current or bridge bias voltage for strain gauges and RTDs in industrial transmitters. IC Role / Device Role / Timing Role: ISL22424UFR16Z functions as a stable, non-volatile rheostat in constant-current source feedback path. Use Value: Maintains sensor accuracy over temperature (±45 ppm/°C end-to-end TC) and lifetime (50-year EEPROM retention). |
| Motor Drive Current Limit Tuning | Medical Instrument Calibration |
|
Use Scenario: Configuring overcurrent trip threshold in BLDC motor gate driver ICs using analog comparator reference inputs. IC Role / Device Role / Timing Role: ISL22424UFR16Z provides adjustable voltage reference to current-sense amplifier output stage. Use Value: Allows OEM-specific current limit programming during final assembly; immune to vibration-induced drift unlike mechanical trimpots. |
Use Scenario: Calibrating gain and zero offset in ECG/EEG analog signal chains requiring traceable, repeatable adjustments. IC Role / Device Role / Timing Role: Dual DCP performs simultaneous channel-matched gain scaling (DCP0) and baseline correction (DCP1). Use Value: Meets IEC 60601-1 requirements for calibration stability; 13 GP registers store multi-point calibration coefficients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digitally controlled potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL22424WFR16Z | 10kΩ total resistance (vs. 50kΩ); otherwise identical pinout, SPI interface, and feature set. | Better suited for higher-current rheostat use (lower RW impact) and lower-impedance voltage dividers. | Select when design requires lower end-to-end resistance and tighter wiper resistance tolerance (±0.15 LSB DNL). |
| AD5242BRUZ50 | Single 50kΩ DCP in TSSOP-16; I²C interface (not SPI); no V− supply; 2.7–5.5V single supply only. | Lacks bipolar operation and daisy-chaining; suitable only for unipolar, low-pin-count designs with I²C master. | Choose only if SPI is unavailable and bipolar DCP functionality is not required; verify layout compatibility (TSSOP vs QFN). |
Compared with ISL22424UFR16Z, ISL22424WFR16Z offers lower resistance for higher drive capability but reduced voltage resolution per tap, while AD5242BRUZ50 sacrifices SPI/dual-supply flexibility for I²C simplicity and single-supply operation.
Availability
ISL22424UFR16Z is available at Aetrix Electronics and suitable for industrial motor control, medical instrumentation, and automotive cabin electronics requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for ISL22424UFR16Z 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 acquired Intersil in 2017 and maintains full technical and manufacturing continuity for the ISL22424 family. Renesas is a global leader in microcontrollers, analog, and power solutions.
The ISL22424 series was designed for high-reliability analog trimming in harsh environments - emphasizing non-volatile configurability, wide temperature operation, and bipolar signal support for industrial and automotive subsystems.
FAQ
What is the total resistance value of the ISL22424UFR16Z?
The ISL22424UFR16Z has a nominal end-to-end resistance of 50kΩ per digitally controlled potentiometer (DCP). This value is specified in the Ordering Information table of the FN6425 datasheet and confirmed across all electrical specifications for the "U" resistance option. Tolerance is ±20%, and temperature coefficient is ±45 ppm/°C over −40°C to +125°C.
Does the ISL22424UFR16Z support daisy-chaining via SPI?
Yes, the ISL22424UFR16Z supports daisy-chain configuration as explicitly stated in the Features section of the FN6425 datasheet. Multiple ISL22424 devices can share a single SPI bus (SCK, SDI, SDO, CS) by connecting the SDO of one device to the SDI of the next, enabling efficient multi-channel analog tuning with minimal MCU resource usage.
What is the function of the V− pin on the ISL22424UFR16Z?
The V− pin on the ISL22424UFR16Z is the negative power supply terminal, rated from −2.25V to −5.5V. It biases the DCP terminals to enable true bipolar operation - allowing RH/RL pins to swing from V− to VCC. It also connects internally to the QFN package's exposed die pad, which must be tied to the V− plane per thermal guidelines in TB389.
How does the ISL22424UFR16Z retain wiper settings after power loss?
The ISL22424UFR16Z retains wiper settings using non-volatile Initial Value Registers (IVR0 and IVR1). At power-up, the device automatically loads these stored values into the volatile Wiper Registers (WR0 and WR1). This recall occurs within 5ms after VCC exceeds 1.9V, ensuring deterministic startup behavior without host intervention.
What package type is used for the ISL22424UFR16Z?
The ISL22424UFR16Z uses a 16-lead QFN package (4mm × 4mm, JEDEC MO-220 variant L16.4x4A) with an exposed die pad. This package is distinct from the TSSOP variants (e.g., ISL22424UFV14Z) and offers superior thermal performance (θJA = 39°C/W) and smaller footprint - critical for space-constrained industrial and automotive PCBs.
ISL22424UFR16Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 16-TFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 2
- Number of Taps:
- 256
- Resistance (Ohms):
- 50k
- Interface:
- SPI
- Memory Type:
- Non-Volatile
- Voltage - Supply:
- ±2.25V ~ 5.5V
- Features:
- -
- Tolerance:
- ±20%
- Temperature Coefficient (Typ):
- ±45ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-QFN (4x4)
- Operating Temperature:
- -40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ):
- 70
ISL22424UFR16Z FAQ
1.How can I place an order for ISL22424UFR16Z through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL22424UFR16Z 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 ISL22424UFR16Z reliable?
The price and inventory of ISL22424UFR16Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL22424UFR16Z is usually 5 days.
3.What payment methods are accepted for ISL22424UFR16Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL22424UFR16Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL22424UFR16Z?
ISL22424UFR16Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL22424UFR16Z 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 ISL22424UFR16Z?
For technical support, including ISL22424UFR16Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL22424UFR16Z requirements.
6.How does Aetrix verify that ISL22424UFR16Z is sourced from the original manufacturer or authorized distributors?
All ISL22424UFR16Z 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 ISL22424UFR16Z meets industry standards.
7.What is the process for return or replacement of ISL22424UFR16Z?
All ISL22424UFR16Z units undergo pre-shipment inspection (PSI). If there is an issue with ISL22424UFR16Z, 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 ISL22424UFR16Z part is unused and in its original packaging.
Return procedure for ISL22424UFR16Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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