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Renesas ISL22343TFR20Z
- Part No.:
- ISL22343TFR20Z
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 20-VQFN Exposed Pad
- Datasheet:
-
ISL22343TFR20Z.pdf
- Description:
- IC DGTL POT 100KOHM 256TAP 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,731
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Product details
Overview
ISL22343TFR20Z from Renesas (formerly Intersil) is a quad digitally controlled potentiometer (XDCP™) with 256-tap resolution, I²C interface, non-volatile wiper storage, dual supply support (VCC = 2.25–5.5V, V− = −2.25 to −5.5V), and 100kΩ end-to-end resistance, used for precision analog trimming in bipolar signal conditioning circuits.
For engineers reviewing the ISL22343TFR20Z datasheet, ISL22343TFR20Z pinout, ISL22343TFR20Z application, or ISL22343TFR20Z equivalent, key selection considerations include its QFN-20 package, ±45 ppm/°C end-to-end tempco, 70Ω typical wiper resistance, shutdown current <4µA, and compatibility with I²C buses supporting up to eight devices via A0–A2 address pins.
Technical Context
The ISL22343TFR20Z integrates four independent DCPs on a single monolithic CMOS die, each with volatile Wiper Registers (WRi) and non-volatile Initial Value Registers (IVRi), enabling power-up recall of preset wiper positions. Its dual-supply architecture supports true bipolar operation between V− and VCC.
It implements resistor arrays with CMOS switches operating in "make-before-break" mode, ensuring glitch-free wiper transitions. The I²C interface complies with standard-mode timing (fSCL ≤ 400kHz), supports addressable access to 4 IVRi + 11 general-purpose non-volatile registers, and features dedicated Access Control Register (ACR) for volatile/non-volatile register selection and shutdown control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Resistance | 100kΩ - defines full-scale analog range for voltage divider or rheostat configurations |
| Taps per Pot | 256 - provides 8-bit resolution (0–255) for fine-grained analog adjustment |
| Wiper Resistance | 70Ω typical @ 1mA - limits insertion error and thermal noise in precision signal paths |
| End-to-End Tempco | ±45 ppm/°C - ensures stable resistance over −40°C to +125°C industrial range |
| Standby Current | <4µA max - enables ultra-low-power operation in battery-backed or energy-sensitive systems |
| I²C Address Pins | A0, A1, A2 - allow up to eight devices on one bus without address conflict |
| Non-volatile Endurance | 1,000,000 cycles - supports frequent recalibration or field updates without EEPROM wear-out |
Pinout & Package
ISL22343TFR20Z uses a 20-lead QFN package (5mm × 5mm, L20.5x5) with exposed die pad internally connected to V−. Thermal land for EPAD should be connected to V− plane or left floating per TB389.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RH0–RH3 | High terminal of DCP0–DCP3 | Fixed positive reference node for each potentiometer; connects to VCC or signal source |
| RL0–RL3 | Low terminal of DCP0–DCP3 | Fixed negative reference node; connects to V− or signal sink in bipolar applications |
| RW0–RW3 | Wiper terminal of DCP0–DCP3 | Adjustable output node; position set by 8-bit WRi register; drives downstream circuitry |
| SCL / SDA | I²C clock/data bidirectional lines | Open-drain interface requiring external pull-ups; supports standard-mode (400kHz) communication |
| A0–A2 | I²C slave address inputs | Set three LSBs of 7-bit address; enable up to eight ISL22343 devices on shared bus |
| VCC / V− | Positive/negative supply rails | Dual supplies enable true bipolar analog range (e.g., ±2.5V or ±5V operation) |
| GND | Digital ground reference | Logic-level reference for I²C interface and control logic; separate from analog return paths |
Key Features
| Feature | Design Value |
|---|---|
| Quad DCP integration | Four independent 100kΩ, 256-tap potentiometers in one QFN-20 package reduce board space vs discrete solutions |
| Non-volatile wiper recall | Power-on reloads IVRi values into WRi registers-ensures repeatable startup behavior without host initialization |
| 11 GP non-volatile registers | Store calibration tables, device IDs, or configuration data across power cycles-no external EEPROM needed |
| Bipolar terminal voltage range | DCP pins tolerate V− to VCC - supports rail-to-rail analog signals in op-amp feedback or level-shifting networks |
| Make-before-break switching | Eliminates open-circuit glitches during wiper transitions-critical for stable biasing in sensitive amplifier stages |
Applications
| Audio Signal Level Control | Programmable Gain Amplifier Calibration |
|---|---|
|
Use Scenario: Adjusting volume or balance in professional audio equipment with digital control and power-loss recovery. IC Role / Device Role / Timing Role: Quad DCP acts as four independent analog attenuators in line-level signal paths, each configured as voltage divider. Use Value: 100kΩ resistance matches standard audio impedances; ±45 ppm/°C tempco maintains channel matching across temperature; non-volatile recall preserves user settings after power cycle. |
Use Scenario: Calibrating gain-setting resistors in instrumentation-grade PGAs to compensate for op-amp offset and resistor tolerance drift. IC Role / Device Role / Timing Role: DCPs replace fixed gain-resistor networks, enabling factory or field calibration via I²C during production test or maintenance. Use Value: 256-tap resolution allows sub-0.4% gain step accuracy; 70Ω wiper resistance minimizes gain error contribution; dual supply supports bipolar input/output PGA topologies. |
| Laser Diode Bias Current Trim | Industrial Sensor Offset Compensation |
|
Use Scenario: Fine-tuning bias current in fiber-optic transceiver laser drivers where stability and repeatability are critical. IC Role / Device Role / Timing Role: One DCP configured as rheostat in series with laser diode cathode to adjust constant-current source compliance. Use Value: 1,000,000-cycle EEPROM endurance supports lifetime recalibration; shutdown mode (<4µA) reduces leakage during standby; 125°C rating suits compact optical modules. |
Use Scenario: Compensating zero-point drift in RTD or strain-gauge bridge sensors within industrial PLC analog input modules. IC Role / Device Role / Timing Role: DCPs serve as programmable offset injection resistors in instrumentation amplifier reference legs. Use Value: Bipolar V−/VCC operation enables negative offset injection; VMATCH ≤ ±2 LSB ensures matched trim across all four channels; −40°C to +125°C rating meets extended industrial requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digitally controlled potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD5243BRMZ100 | Single-supply only (2.7–5.5V); no V− pin; 100kΩ, 256-tap; SPI interface instead of I²C | Cannot support bipolar analog ranges; requires separate level-shifting for negative signals | Choose when system uses SPI infrastructure and operates only with unipolar supplies |
| MCP45HV51-104E/ST | High-voltage tolerant (up to ±18V across terminals); 100kΩ, 256-tap; I²C-compatible but no V− pin; uses single VDD | Lacks true dual-supply capability; relies on external biasing for bipolar operation | Prefer for high-voltage sensor interfaces where extended terminal voltage range outweighs need for integrated V− |
Compared with AD5243BRMZ100 and MCP45HV51-104E/ST, the ISL22343TFR20Z uniquely delivers native dual-supply operation with internal V− connection-enabling direct bipolar signal conditioning without external level shifters or charge pumps-while maintaining I²C compatibility and non-volatile recall in a compact QFN package.
Availability
ISL22343TFR20Z is available at Aetrix Electronics and suitable for industrial sensor calibration, optical module biasing, and programmable analog front-ends requiring stable component supply across extended temperature and long product lifecycles.
Supply support for ISL22343TFR20Z 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 digitally controlled potentiometers and interface ICs for industrial and communications markets.
The ISL22343 series was designed for high-reliability analog trimming in harsh environments-targeting applications demanding non-volatile recall, bipolar operation, and extended temperature performance from −40°C to +125°C.
FAQ
What is the package type and footprint of the ISL22343TFR20Z?
The ISL22343TFR20Z uses a 20-lead QFN package measuring 5mm × 5mm (L20.5x5), with an exposed die pad internally connected to V−. Its footprint differs from the TSSOP variant (ISL22343TFV20Z) and requires PCB layout adherence to thermal guidelines in TB389-specifically, connecting the EPAD to the V− plane or leaving it floating.
Does the ISL22343TFR20Z support true bipolar analog operation?
Yes-the ISL22343TFR20Z supports true bipolar operation via dedicated VCC (2.25–5.5V) and V− (−2.25 to −5.5V) supplies. DCP terminals (RH/RL/RW) tolerate voltages from V− to VCC, enabling direct use in ±2.5V, ±5V, or other split-rail signal chains without external level shifting or charge pumps.
How does non-volatile wiper recall work on the ISL22343TFR20Z?
At power-up, the ISL22343TFR20Z automatically loads the contents of each non-volatile Initial Value Register (IVRi) into its corresponding volatile Wiper Register (WRi), positioning all four wipers to their last-saved state. This occurs after VCC exceeds 1.9V and completes within 5ms, eliminating need for host-initiated restore sequences.
Can the ISL22343TFR20Z be used in rheostat mode?
Yes-the ISL22343TFR20Z supports both three-terminal potentiometer and two-terminal rheostat configurations. In rheostat mode, either RH or RL is left unconnected while RW and the other terminal form a variable resistor; specifications such as RINL (±1 MI), RDNL (±0.04 MI), and TCR (±40 ppm/°C) apply directly to this usage.
What is the maximum I²C bus speed supported by the ISL22343TFR20Z?
The ISL22343TFR20Z supports standard-mode I²C operation up to 400kHz (fSCL). Its timing parameters-including tLOW (1300ns), tHIGH (600ns), and tAA (900ns)-are fully compliant with I²C specification v2.1. It does not support fast-mode (1MHz) or high-speed mode.
ISL22343TFR20Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 20-VQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Taper:
- Linear
- Configuration:
- Potentiometer
- Number of Circuits:
- 4
- Number of Taps:
- 256
- Resistance (Ohms):
- 100k
- Interface:
- I2C
- Memory Type:
- Non-Volatile
- Voltage - Supply:
- 2.25V ~ 5.5V
- Features:
- Selectable Address
- Tolerance:
- ±20%
- Temperature Coefficient (Typ):
- ±45ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 20-QFN (5x5)
- Operating Temperature:
- -40°C ~ 125°C
- Resistance - Wiper (Ohms) (Typ):
- 70
ISL22343TFR20Z FAQ
1.How can I place an order for ISL22343TFR20Z through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL22343TFR20Z 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 ISL22343TFR20Z reliable?
The price and inventory of ISL22343TFR20Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL22343TFR20Z is usually 5 days.
3.What payment methods are accepted for ISL22343TFR20Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL22343TFR20Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL22343TFR20Z?
ISL22343TFR20Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL22343TFR20Z 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 ISL22343TFR20Z?
For technical support, including ISL22343TFR20Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL22343TFR20Z requirements.
6.How does Aetrix verify that ISL22343TFR20Z is sourced from the original manufacturer or authorized distributors?
All ISL22343TFR20Z 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 ISL22343TFR20Z meets industry standards.
7.What is the process for return or replacement of ISL22343TFR20Z?
All ISL22343TFR20Z units undergo pre-shipment inspection (PSI). If there is an issue with ISL22343TFR20Z, 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 ISL22343TFR20Z part is unused and in its original packaging.
Return procedure for ISL22343TFR20Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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