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Renesas ISL22424UFV14Z-TK
- Part No.:
- ISL22424UFV14Z-TK
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ISL22424UFV14Z-TK.pdf
- Description:
- IC DGT POT 50KOHM 256TAP 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,781
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Product details
Overview
ISL22424UFV14Z-TK from Renesas Electronics (formerly Intersil) is a dual digitally controlled potentiometer (XDCP™) with 256-tap resolution, SPI interface, non-volatile wiper position storage, and 50kΩ end-to-end resistance per channel. It operates from dual supplies (VCC = 2.25–5.5V, V− = −2.25 to −5.5V), supports voltage divider and rheostat modes, and targets precision analog trimming in industrial signal conditioning circuits.
For engineers reviewing the ISL22424UFV14Z-TK datasheet, ISL22424UFV14Z-TK pinout, ISL22424UFV14Z-TK application, or ISL22424UFV14Z-TK equivalent, this page delivers verified specifications, TSSOP-14 package details, dual-supply operation constraints, wiper register behavior, and confirmed alternatives for analog calibration designs requiring extended temperature range (−40°C to +125°C) and EEPROM retention.
Technical Context
The ISL22424UFV14Z-TK integrates two independent 8-bit DCPs with volatile Wiper Registers (WR0/WR1) and non-volatile Initial Value Registers (IVR0/IVR1), enabling power-up recall of preset wiper positions. Each DCP uses resistor ladder + CMOS switch architecture with make-before-break switching and supports both three-terminal potentiometer and two-terminal rheostat configurations.
Its SPI interface complies with Mode 0 (CPOL = 0, CPHA = 0), supports daisy-chaining, and includes an Access Control Register (ACR) for volatile/non-volatile register selection, shutdown control, and SDO output configuration. Shutdown mode forces open-circuit between RH/RL and shorts RW to RL per channel.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Resistance | 50kΩ per DCP (confirmed for ISL22424UFV14Z-TK per Ordering Information) |
| Taps / Resolution | 256 linear steps (8-bit wiper register, 0–255 decimal) |
| Supply Range | VCC = 2.25V to 5.5V; V− = −2.25V to −5.5V - enables bipolar terminal voltage swing (V− to VCC) |
| Wiper Resistance | 70Ω typical at 1mA - impacts loading error in high-impedance voltage divider applications |
| Temperature Range | −40°C to +125°C - qualified for extended industrial environments |
| Non-volatile Endurance | 1,000,000 write cycles - supports field recalibration without wear-out concerns |
| Standby Current | <4µA max at +125°C - enables low-power system sleep states |
Pinout & Package
ISL22424UFV14Z-TK is housed in a 14-lead TSSOP package (Pb-free, RoHS compliant, JEDEC MO-153 variant M14.173). Pin functions are validated per datasheet Figure 3 (TSSOP top view) and Page 4 Pin Descriptions.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| RH0 | High terminal of DCP0 | Fixed end of DCP0 resistor ladder; referenced to V− or VCC depending on configuration |
| RL0 | Low terminal of DCP0 | Fixed end of DCP0; used as ground reference or negative rail in bipolar setups |
| RW0 | Wiper terminal of DCP0 | Adjustable tap point; connects to intermediate node based on WR0 register value |
| RH1 | High terminal of DCP1 | Independent high terminal for second DCP; supports dual-channel trimming |
| RL1 | Low terminal of DCP1 | Independent low terminal; enables separate biasing or signal paths per DCP |
| RW1 | Wiper terminal of DCP1 | Second adjustable output; synchronized or independently controlled via WR1 |
| SDO | SPI data output | Push-pull or open-drain (configurable via ACR[1]); outputs read data on SCK falling edge |
| V− | Negative supply | Required for bipolar operation; internally connects to EPAD in QFN variants (not applicable here) |
| CS | Chip select (active low) | Enables SPI communication; rising edge triggers non-volatile write completion |
| SCK | SPI clock input | Mode 0 timing; data sampled on rising edge (SDI), shifted out on falling edge (SDO) |
| GND | Digital ground | Reference for digital I/O pins (SCK, SDI, CS, SDO); separate from analog return paths |
| SDI | SPI data input | Accepts instruction + data bytes; MSB-first protocol per Table 3 and Table 4 |
| VCC | Positive supply | Primary logic and analog supply; powers internal registers and CMOS switches |
| NC | No connection | Pins 7 and 13 are unconnected; must be left floating per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Dual 256-tap DCPs in single TSSOP-14 | Reduces board space vs. discrete potentiometers or dual-IC solutions; eliminates manual calibration |
| Non-volatile IVR storage (50-year retention @ ≤+55°C) | Preserves factory-set or user-defined trim points across power cycles without external EEPROM |
| 13 GP non-volatile registers | Stores lookup tables, calibration coefficients, or system IDs - usable for multi-point compensation |
| Shutdown mode (SHDN bit in ACR) | Disables DCP conduction and shorts RW to RL - prevents signal leakage during idle periods |
| Dual-supply operation (V−/VCC) | Supports true bipolar analog signals (e.g., ±2.5V rails) without level-shifting circuitry |
| Make-before-break wiper switching | Prevents open-circuit glitches during tap transitions - critical for stable feedback loops |
Applications
| Industrial Sensor Signal Conditioning | Programmable Gain Amplifier Calibration |
|---|---|
|
Use Scenario: Trimming offset and gain in 4–20mA transmitter front-ends operating in harsh environments (−40°C to +125°C). IC Role / Device Role / Timing Role: Dual DCP provides simultaneous zero and span adjustment; non-volatile IVRs retain calibrated values after power loss. Use Value: Eliminates manual trimpots and associated rework; enables remote recalibration via SPI without hardware modification. |
Use Scenario: Setting precise closed-loop gain in programmable instrumentation amplifiers for test equipment. IC Role / Device Role / Timing Role: One DCP configures feedback resistor ratio; second DCP adjusts input attenuation - both updated dynamically during self-test. Use Value: Achieves <±0.5 LSB INL in voltage divider mode (per datasheet p.5), enabling 12-bit effective resolution in gain control. |
| Bipolar Power Supply Monitoring | Embedded System Voltage Reference Tuning |
|
Use Scenario: Scaling ±12V rail monitors into ADC input range (0–3.3V) in telecom power shelves. IC Role / Device Role / Timing Role: DCPs operate with V− = −12V and VCC = +3.3V; RH/RL terminals biased at rail extremes, RW feeds resistive divider. Use Value: Dual-supply capability allows direct interface to bipolar signals - avoids costly op-amp level shifters and extra supplies. |
Use Scenario: Fine-tuning bandgap reference output (e.g., 1.25V) in microcontroller-based PLC modules. IC Role / Device Role / Timing Role: Single DCP in rheostat mode adjusts current through reference IC; second DCP trims series resistance for temperature compensation. Use Value: 50kΩ total resistance and ±45 ppm/°C tempco (U option) ensure stable reference over full industrial range. |
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-TK | 10kΩ total resistance; 16-lead QFN package; same dual-DXP architecture, SPI interface, and non-volatile features | Better suited for high-frequency (>250kHz) rheostat use due to lower RC time constant; requires PCB redesign for QFN footprint | Select when lower resistance and thermal performance (θJA = 39°C/W) outweigh TSSOP layout compatibility |
| AD5242BRUZ10 | Analog Devices dual 256-tap DCP; 10kΩ; SPI-compatible but no V− supply - single 2.7–5.5V rail only; different register map and shutdown behavior | Lacks bipolar operation support; unsuitable for V−-referenced signal paths; requires firmware adaptation for register access | Choose only for cost-sensitive, single-supply systems where bipolar capability is unnecessary |
Compared with ISL22424UFV14Z-TK, ISL22424WFR16Z-TK offers lower resistance and superior thermal dissipation but mandates QFN re-layout, while AD5242BRUZ10 sacrifices bipolar operation and non-volatile reliability for broader distributor availability and lower unit cost in unipolar designs.
Availability
ISL22424UFV14Z-TK is available at Aetrix Electronics and suitable for industrial sensor conditioning, programmable gain amplifier calibration, and bipolar power supply monitoring requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for ISL22424UFV14Z-TK 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 its precision analog portfolio, emphasizing high-reliability industrial and automotive ICs with robust process technology and long-term support.
The ISL22424UFV14Z-TK belongs to Renesas' XDCP™ digitally controlled potentiometer family, designed specifically for replacing mechanical trimpots in automated calibration, sensor compensation, and adaptive analog signal chains.
FAQ
What is the total resistance value of the ISL22424UFV14Z-TK?
The ISL22424UFV14Z-TK has a nominal end-to-end resistance of 50kΩ per DCP channel, as specified in the Ordering Information table (FN6425 Rev 1.00, Page 2) and confirmed in the Analog Specifications section (Page 5, RTOTAL parameter). This value is fixed at manufacture and applies to both DCP0 and DCP1.
Does the ISL22424UFV14Z-TK support bipolar voltage operation?
Yes, the ISL22424UFV14Z-TK supports true bipolar operation via dual supplies: VCC = 2.25V to 5.5V and V− = −2.25V to −5.5V. This allows DCP terminals (RH/RL) to swing between V− and VCC, enabling direct interfacing with ± signals without external level-shifting circuitry - a key feature distinguishing it from unipolar DCPs like the AD5242.
How does the non-volatile memory function in the ISL22424UFV14Z-TK?
The ISL22424UFV14Z-TK contains two non-volatile Initial Value Registers (IVR0/IVR1) that store wiper positions retained for 50 years at ≤+55°C. At power-up, these values auto-load into volatile Wiper Registers (WR0/WR1). Writes to IVRs require setting ACR[7]=0 and execute with up to 20ms internal write cycle time (tWC), verified in the EEPROM Specification table (Page 7).
What package type is used for the ISL22424UFV14Z-TK?
The ISL22424UFV14Z-TK uses a 14-lead Thin Shrink Small Outline Package (TSSOP), identified as "14 Ld TSSOP" in the Ordering Information (Page 2) and detailed in Package Drawing M14.173. It is Pb-free plus anneal (RoHS compliant) and features exposed pad grounding only in QFN variants - not applicable to this TSSOP version.
Can the ISL22424UFV14Z-TK be used in daisy-chain SPI configurations?
Yes, the ISL22424UFV14Z-TK supports daisy-chain SPI operation as explicitly stated in the Features list (Page 1) and Applications Information section (Page 15). Multiple devices share SCK, CS, and SDI lines, with SDO of one device connected to SDI of the next, enabling efficient multi-channel trimming with minimal GPIO usage.
ISL22424UFV14Z-TK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 14-TSSOP
- Operating Temperature:
- -40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ):
- 70
ISL22424UFV14Z-TK FAQ
1.How can I place an order for ISL22424UFV14Z-TK through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL22424UFV14Z-TK 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 ISL22424UFV14Z-TK reliable?
The price and inventory of ISL22424UFV14Z-TK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL22424UFV14Z-TK is usually 5 days.
3.What payment methods are accepted for ISL22424UFV14Z-TK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL22424UFV14Z-TK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL22424UFV14Z-TK?
ISL22424UFV14Z-TK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL22424UFV14Z-TK 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 ISL22424UFV14Z-TK?
For technical support, including ISL22424UFV14Z-TK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL22424UFV14Z-TK requirements.
6.How does Aetrix verify that ISL22424UFV14Z-TK is sourced from the original manufacturer or authorized distributors?
All ISL22424UFV14Z-TK 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 ISL22424UFV14Z-TK meets industry standards.
7.What is the process for return or replacement of ISL22424UFV14Z-TK?
All ISL22424UFV14Z-TK units undergo pre-shipment inspection (PSI). If there is an issue with ISL22424UFV14Z-TK, 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 ISL22424UFV14Z-TK part is unused and in its original packaging.
Return procedure for ISL22424UFV14Z-TK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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