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Renesas ISL22343WFR20Z-TK
- Part No.:
- ISL22343WFR20Z-TK
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 20-VQFN Exposed Pad
- Datasheet:
-
ISL22343WFR20Z-TK.pdf
- Description:
- IC DGTL POT 10KOHM 256TAP 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,349
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Product details
Overview
ISL22343WFR20Z-TK from Renesas (formerly Intersil) is a quad digitally controlled potentiometer (XDCP™) with I²C interface, 256-tap resolution, 10kΩ end-to-end resistance, dual supply operation (VCC = 2.25–5.5V, V− = −2.25 to −5.5V), and extended industrial temperature range (−40°C to +125°C). It integrates non-volatile initial value registers and 11 general-purpose EEPROM registers for wiper position storage and system calibration in precision analog control loops.
For engineers reviewing the ISL22343WFR20Z-TK datasheet, ISL22343WFR20Z-TK pinout, ISL22343WFR20Z-TK application, or ISL22343WFR20Z-TK equivalent, this device supports bipolar signal conditioning, programmable gain/offset trimming, and multi-channel sensor biasing where low-noise, low-power, and non-volatile wiper recall are critical design requirements.
Technical Context
The ISL22343WFR20Z-TK implements four independent 8-bit DCPs using resistor arrays and CMOS switches with "make-before-break" wiper switching. Each DCP features volatile Wiper Registers (WRi) and non-volatile Initial Value Registers (IVRi), enabling power-up recall of calibrated positions. The I²C interface supports up to eight devices per bus via A0–A2 address pins and operates at 400kHz.
It operates in dual-supply mode to support bipolar terminal voltage ranges (V− to VCC), enabling use as true three-terminal potentiometers or two-terminal rheostats. Wiper resistance is 70Ω typical at 1mA, and DCP matching across channels is ±2 LSB in voltage divider mode - critical for multi-channel synchronization in instrumentation and audio systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Resistance | 10kΩ - defines full-scale analog range for gain/attenuation and bias setting in precision circuits. |
| Resolution | 256 taps (8-bit) - enables fine-grained adjustment with ~0.4% step size for high-accuracy calibration. |
| Supply Range | VCC = 2.25–5.5V, V− = −2.25 to −5.5V - supports bipolar signal paths and rail-to-rail analog interfacing. |
| Wiper Resistance | 70Ω typical - minimizes insertion error in low-impedance feedback networks and sensor bridges. |
| Standby Current | <4µA max - enables ultra-low-power operation in battery-backed or always-on monitoring systems. |
| Temperature Range | −40°C to +125°C - qualified for under-hood automotive, industrial motor control, and harsh-environment sensing. |
| I²C Speed | 400kHz - allows fast configuration updates without blocking host MCU real-time tasks. |
Pinout & Package
ISL22343WFR20Z-TK uses a 20-lead QFN package (5mm × 5mm, L20.5x5) with exposed die pad internally connected to V−. Pin mapping is validated per FN6423 Rev 2.00 datasheet, Page 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RH0–RH3 | High terminal of DCP0–DCP3 | Fixed end of each potentiometer array; referenced to VCC or external positive rail in voltage divider mode. |
| RL0–RL3 | Low terminal of DCP0–DCP3 | Fixed end referenced to V− or external negative rail; enables true bipolar operation when V− < 0V. |
| RW0–RW3 | Wiper terminal of DCP0–DCP3 | Movable contact position controlled by WRi register; output node for adjustable voltage or resistance. |
| SCL / SDA | I²C clock/data bidirectional lines | Open-drain interface requiring external pull-ups; supports standard-mode I²C (400kHz) for host-controlled reconfiguration. |
| A0–A2 | I²C slave address inputs | Set 3 LSBs of 7-bit address; allow up to eight ISL22343 devices on same bus without address conflict. |
| VCC / V− | Positive/negative supply rails | Dual supplies enable symmetric ±2.25V to ±5.5V analog range - essential for op-amp biasing and AC-coupled signal chains. |
| GND | Digital ground reference | Separate from analog return paths; must be routed with low-impedance connection to minimize digital noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Quad DCP integration | Four independent 10kΩ, 256-tap potentiometers in single QFN - reduces board space and BOM count vs discrete solutions. |
| Non-volatile wiper recall | IVRi registers retain last-set wiper positions across power cycles; eliminates need for host MCU re-initialization at startup. |
| 11 GP non-volatile registers | EEPROM storage for lookup tables, calibration coefficients, or device-specific settings - extends configurability beyond wiper control. |
| Bipolar terminal voltage support | V− to VCC range allows DCP terminals to swing beyond GND - enables true AC signal attenuation and offset control in op-amp circuits. |
| Low wiper resistance & high matching | 70Ω typical RW and ±2 LSB DCP-to-DCP matching ensure consistent channel behavior in multi-path analog signal processing. |
Applications
| Audio Channel Trimming | Industrial Sensor Biasing |
|---|---|
|
Use Scenario: Calibrating DC offset and gain in multi-channel audio preamplifiers for studio-grade line-level outputs. IC Role / Device Role / Timing Role: Quad DCP provides independent, non-volatile trim for four analog signal paths - each RH/RL/RW pair sets op-amp feedback network values. Use Value: Eliminates manual potentiometer tuning; maintains factory calibration over temperature (±4 ppm/°C ratiometric TC) and lifetime (50-year EEPROM retention). |
Use Scenario: Setting precise excitation current and zero-point compensation for bridge-based pressure/strain sensors in PLC modules. IC Role / Device Role / Timing Role: Acts as programmable current-source resistor and offset nulling element - V−/VCC dual supply enables bipolar sensor output conditioning. Use Value: Enables one-time calibration during production and field recalibration via I²C - wiper recall ensures consistent sensor output after power loss. |
| Motor Control Feedback Scaling | Medical Instrument Gain Calibration |
|
Use Scenario: Scaling analog feedback signals (e.g., current sense, position encoder) in servo drives operating from −40°C to +125°C. IC Role / Device Role / Timing Role: Rheostat-mode DCP (RW–RL) adjusts gain of isolation amplifier feedback loop - matched DCPs ensure channel-to-channel consistency. Use Value: Maintains <±0.5 LSB DNL across full temperature range - critical for closed-loop stability and torque ripple reduction. |
Use Scenario: Programmable gain/offset adjustment in portable ECG front-ends requiring FDA-compliant calibration traceability. IC Role / Device Role / Timing Role: Voltage-divider-mode DCP sets programmable gain in instrumentation amplifier stage - non-volatile IVRi stores patient-specific calibration data. Use Value: Supports 1,000,000 write cycles per register - enables repeated recalibration during device lifecycle without EEPROM wear-out concerns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digitally controlled potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5242BRUZ10 | Single 10kΩ DCP, I²C, TSSOP-14; no dual supply support; 200k write endurance; 20-year data retention. | Lacks quad integration and bipolar operation - requires four devices and external level-shifting for V− referenced signals. | Choose for cost-sensitive, single-channel designs where dual supply and EEPROM longevity are not required. |
| MCP45HV51-103E/ST | Quad 10kΩ DCP, SPI interface, TSSOP-20; supports 5.5V to 36V high-voltage operation; no V− rail; 200k write cycles. | No negative supply capability - unsuitable for true bipolar signal paths; SPI interface adds MCU pin overhead vs I²C. | Choose when interfacing with high-voltage analog stages (>12V) and SPI is already used in system architecture. |
Compared with AD5242BRUZ10 and MCP45HV51-103E/ST, the ISL22343WFR20Z-TK uniquely delivers quad-channel integration, dual-supply operation, 1M-cycle EEPROM endurance, and 50-year data retention - making it optimal for compact, high-reliability, bipolar analog control in automotive and industrial systems.
Availability
ISL22343WFR20Z-TK is available at Aetrix Electronics and suitable for industrial motor control, medical instrumentation, and automotive cabin electronics requiring stable component supply, long-term calibration integrity, and extended temperature operation.
Supply support for ISL22343WFR20Z-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 continues to support its precision analog portfolio, including XDCP™ digitally controlled potentiometers, with full datasheet documentation and long-term product commitments.
The ISL22343 belongs to Renesas' XDCP™ family, designed specifically for replacing mechanical potentiometers in automated calibration, sensor signal conditioning, and programmable analog front-ends where non-volatility, channel matching, and wide temperature operation are mandatory.
FAQ
What is the package type and footprint of ISL22343WFR20Z-TK?
The ISL22343WFR20Z-TK uses a 20-lead QFN package (5mm × 5mm, L20.5x5) with an exposed die pad internally connected to V−. Its footprint matches standard QFN-20 land patterns with thermal pad grounding to V− plane recommended per TB389. This differs from the TSSOP variant (e.g., ISL22343WFV20Z) and requires distinct PCB layout.
Does ISL22343WFR20Z-TK support true bipolar operation?
Yes - ISL22343WFR20Z-TK supports true bipolar operation via separate VCC (2.25–5.5V) and V− (−2.25 to −5.5V) supplies. This allows DCP terminals (RH/RL) to swing symmetrically around GND, enabling AC-coupled signal attenuation and offset control without external level shifters - a capability absent in most single-supply DCPs.
How does non-volatile memory work in ISL22343WFR20Z-TK?
The ISL22343WFR20Z-TK contains four non-volatile Initial Value Registers (IVRi) that store wiper positions across power cycles. At power-up, contents of IVRi are automatically loaded into volatile Wiper Registers (WRi). IVRi supports 1,000,000 write cycles and 50-year data retention at ≤+55°C - verified per FN6423 datasheet Section "EEPROM SPECIFICATION".
Can ISL22343WFR20Z-TK be used in rheostat mode?
Yes - each DCP in ISL22343WFR20Z-TK can operate as a two-terminal variable resistor (rheostat) by connecting either RH or RL to RW and leaving the other terminal open. In this mode, resistance between RW and RL varies from ~0Ω to 10kΩ with ±0.5 MI DNL and ±3 MI INL - confirmed in datasheet Table "Analog Specifications", page 5.
What is the maximum I²C clock frequency supported by ISL22343WFR20Z-TK?
The ISL22343WFR20Z-TK supports standard-mode I²C operation up to 400kHz, as specified in the "SERIAL INTERFACE SPECS" table (page 7 of FN6423). Timing parameters including tLOW (1300ns), tHIGH (600ns), and tSU:STA (600ns) are fully characterized for reliable communication at this rate across the full −40°C to +125°C range.
ISL22343WFR20Z-TK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 20-VQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 4
- Number of Taps:
- 256
- Resistance (Ohms):
- 10k
- Interface:
- I2C
- Memory Type:
- Non-Volatile
- Voltage - Supply:
- 2.25V ~ 5.5V
- Features:
- Selectable Address
- Tolerance:
- ±20%
- Temperature Coefficient (Typ):
- ±85ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 20-QFN (5x5)
- Operating Temperature:
- -40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ):
- 70
ISL22343WFR20Z-TK FAQ
1.How can I place an order for ISL22343WFR20Z-TK through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL22343WFR20Z-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 ISL22343WFR20Z-TK reliable?
The price and inventory of ISL22343WFR20Z-TK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL22343WFR20Z-TK is usually 5 days.
3.What payment methods are accepted for ISL22343WFR20Z-TK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL22343WFR20Z-TK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL22343WFR20Z-TK?
ISL22343WFR20Z-TK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL22343WFR20Z-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 ISL22343WFR20Z-TK?
For technical support, including ISL22343WFR20Z-TK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL22343WFR20Z-TK requirements.
6.How does Aetrix verify that ISL22343WFR20Z-TK is sourced from the original manufacturer or authorized distributors?
All ISL22343WFR20Z-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 ISL22343WFR20Z-TK meets industry standards.
7.What is the process for return or replacement of ISL22343WFR20Z-TK?
All ISL22343WFR20Z-TK units undergo pre-shipment inspection (PSI). If there is an issue with ISL22343WFR20Z-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 ISL22343WFR20Z-TK part is unused and in its original packaging.
Return procedure for ISL22343WFR20Z-TK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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