Features
- Four potentiometers in one package
- 128 resistor taps
- I2C serial interface
- Three address pins, up to eight devices/bus
- Non-volatile storage of wiper position
- Wiper resistance: 70Ω typical @ VCC = 3.3V
- Shutdown mode
- Shutdown current 5µA max
- Power supply: 2.7V to 5.5V
- 50kΩ or 10kΩ total resistance
- High reliability
- Endurance: 1,000,000 data changes per bit per register
- Register data retention: 50 years @ T ≤ +55°C
- 20 Ld TSSOP or 20 Ld TQFN package
- Pb-free (RoHS compliant)
ISL22346 Functional Diagram
Description
The ISL22346 integrates four digitally controlled potentiometers (DCP) and non-volatile memory on a monolithic CMOS integrated circuit. The digitally controlled potentiometers are implemented with a combination of resistor elements and CMOS switches. The position of the wipers are controlled by the user through the I2C bus interface. Each potentiometer has an associated volatile Wiper Register (WR) and a non-volatile Initial Value Register (IVR) that can be directly written to and read by the user. The contents of the WR controls the position of the wiper. At power-up the device recalls the contents of the two DCP's IVR to the corresponding WRs. The DCPs can be used as a three-terminal potentiometers or as a two-terminal variable resistors in a wide variety of applications including control, parameter adjustments, and signal processing.
Parameters
| Attributes | Value |
|---|---|
| Resistance Taper | Linear |
| Taps (#) | 128 |
| Resistance Options (kΩ) | 10, 50 |
| Channels (#) | 4 |
| Interface | I2C |
| Memory Type | Nonvolatile |
| Vcc (V) | 2.7 to 5.5 |
| Supply Current Icc (µA) | 5 |
| Single Supply Voltage Range (V) | 5.5 |
| Wiper Current (mA) | 3 |
| Wiper Resistance (ohms) | 70 |
| VL Terminal Voltage (Max) (V) | 5.5 |
| End-to-End Temperature Coefficient (ppm/°C) | 50 |
| Middlepoint Ratiometric Tempco | 4 |
| Advanced Features | 3 terminal DCP with shutdown feature |
| Qualification Level | Standard |
| Part Number | Status | Samples | Stock | RoHS | Package | Budgetary Price (USD) | Lead Count (#) | Carrier Type | Moisture Sensitivity Level (MSL) | Pitch (mm) | Pkg. Dimensions (mm) | Resistance Options (kΩ) | Pb (Lead) Free | Pb Free Category | Temp. Range (°C) | Country of Assembly | Country of Wafer Fabrication |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ISL22346UFRT20Z | Active | Available | In Stock | RoHS:EN | TQFN | 1ku | $3.96 | 20# | Tray | 1 | 0.5mm | 4.0 x 4.0 x 0.80 | 50kΩ | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +125°C | MALAYSIA | SINGAPORE |
| ISL22346UFRT20Z-TK | Active | N/A | In Stock | RoHS:EN | TQFN | 1ku | $3.96 | 20# | Reel | 1 | 0.5mm | 4.0 x 4.0 x 0.80 | 50kΩ | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +125°C | MALAYSIA | SINGAPORE |
| ISL22346UFV20Z | Active | Available | In Stock | RoHS:EN | TSSOP | 1ku | $3.96 | 20# | Tube | 1 | 0.7mm | 6.5 x 4.4 x 0.00 | 50kΩ | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +125°C | MALAYSIA | SINGAPORE |
| ISL22346UFV20Z-TK | Active | N/A | In Stock | RoHS:EN | TSSOP | 1ku | $3.96 | 20# | Reel | 1 | 0.7mm | 6.5 x 4.4 x 0.00 | 50kΩ | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +125°C | MALAYSIA | SINGAPORE |
| ISL22346WFRT20Z | Active | Available | In Stock | RoHS:EN | TQFN | 1ku | $3.96 | 20# | Tray | 1 | 0.5mm | 4.0 x 4.0 x 0.80 | 10kΩ | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +125°C | MALAYSIA | SINGAPORE |
| ISL22346WFRT20Z-TK | Active | Available | In Stock | RoHS:EN | TQFN | 1ku | $3.96 | 20# | Reel | 1 | 0.5mm | 4.0 x 4.0 x 0.80 | 10kΩ | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +125°C | MALAYSIA | SINGAPORE |
| ISL22346WFV20Z | Active | Available | In Stock | RoHS:EN | TSSOP | 1ku | $3.96 | 20# | Tube | 1 | 0.7mm | 6.5 x 4.4 x 0.00 | 10kΩ | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +125°C | MALAYSIA | SINGAPORE |
| ISL22346WFV20Z-TK | Active | N/A | In Stock | RoHS:EN | TSSOP | 1ku | $3.96 | 20# | Reel | 1 | 0.7mm | 6.5 x 4.4 x 0.00 | 10kΩ | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +125°C | MALAYSIA | SINGAPORE |
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- Manual - Development ToolsPDF 2.16 MB AN1555 Sep 17, 2025
- Product Change NoticePDF 169 KB Nov 17, 2022
- Product Change NoticePDF 121 KB PCN11113A Aug 13, 2012
- Product Change NoticePDF 120 KB PCN11113 Oct 31, 2011
- Application NotePDF 281 KB an1425 May 22, 2008AI-generated Summary: Digitally Controlled Potentiometers (DCPs) offer precise resistance control with configurations in both serial and parallel modes, featuring fixed resistors and various resistance options. The ISL22317 model provides 1% precision with 128 taps and can function as a two-terminal variable resistor or three-terminal potentiometer, delivering high accuracy and low temperature coefficient. DCPs can outperform DACs in fine tuning within limited ranges, offering better resolution with fewer bits. Resolution varies with voltage and tap count, as detailed in the provided tables. Usage guidelines and liability disclaimers emphasize proper application and safety considerations.
- Application NotePDF 251 KB an1699 Jan 19, 2004AI-generated Summary: This document outlines important legal disclaimers and usage guidelines for semiconductor products. It emphasizes user responsibility for product design, disclaims liability for damages, and prohibits unauthorized modifications or reverse engineering. Products are categorized by quality grades with specific application recommendations. Users must comply with safety, environmental, and export regulations. Renesas disclaims warranties and liability for improper use or noncompliance. Contact information for global sales offices is provided.
- Application NotePDF 503 KB an9675 Aug 13, 1999AI-generated Summary: Effective Number of Bits (ENOB) depends critically on precise coherence in A/D sampling, with small frequency shifts significantly impacting accuracy. Unwrapping reconstructs coherently sampled sine waves, while windowing controls spectral leakage by shaping the acquisition window. Resampling and interpolation adjust sample sets to avoid leakage in FFT analysis. Different window functions balance side lobe levels and bandwidth, affecting spectral resolution and leakage reduction.
- Application NotePDF 287 KB an9705 Feb 21, 1997AI-generated Summary: Coherent sampling requires the ratio of signal frequency to sampling frequency to be a rational number, expressed as ko/N. When this condition is not met, frequency smearing occurs across bins. Data Acquisition Systems (DAS) can mitigate this by windowing, fixing sampling frequency and tuning input frequency, or fixing input frequency and tuning sampling frequency. The latter two methods are practical for most systems. Pseudo-code illustrates the frequency response for non-integer ko values.
Recommended Documents (1)
Datasheets (1)
- Manual - Development ToolsPDF 2.16 MB AN1555 Sep 17, 2025
Manuals & Guides (1)
- Application NotePDF 281 KB an1425 May 22, 2008AI-generated Summary: Digitally Controlled Potentiometers (DCPs) offer precise resistance control with configurations in both serial and parallel modes, featuring fixed resistors and various resistance options. The ISL22317 model provides 1% precision with 128 taps and can function as a two-terminal variable resistor or three-terminal potentiometer, delivering high accuracy and low temperature coefficient. DCPs can outperform DACs in fine tuning within limited ranges, offering better resolution with fewer bits. Resolution varies with voltage and tap count, as detailed in the provided tables. Usage guidelines and liability disclaimers emphasize proper application and safety considerations.
- Application NotePDF 251 KB an1699 Jan 19, 2004AI-generated Summary: This document outlines important legal disclaimers and usage guidelines for semiconductor products. It emphasizes user responsibility for product design, disclaims liability for damages, and prohibits unauthorized modifications or reverse engineering. Products are categorized by quality grades with specific application recommendations. Users must comply with safety, environmental, and export regulations. Renesas disclaims warranties and liability for improper use or noncompliance. Contact information for global sales offices is provided.
- Application NotePDF 503 KB an9675 Aug 13, 1999AI-generated Summary: Effective Number of Bits (ENOB) depends critically on precise coherence in A/D sampling, with small frequency shifts significantly impacting accuracy. Unwrapping reconstructs coherently sampled sine waves, while windowing controls spectral leakage by shaping the acquisition window. Resampling and interpolation adjust sample sets to avoid leakage in FFT analysis. Different window functions balance side lobe levels and bandwidth, affecting spectral resolution and leakage reduction.
- Application NotePDF 287 KB an9705 Feb 21, 1997AI-generated Summary: Coherent sampling requires the ratio of signal frequency to sampling frequency to be a rational number, expressed as ko/N. When this condition is not met, frequency smearing occurs across bins. Data Acquisition Systems (DAS) can mitigate this by windowing, fixing sampling frequency and tuning input frequency, or fixing input frequency and tuning sampling frequency. The latter two methods are practical for most systems. Pseudo-code illustrates the frequency response for non-integer ko values.
Application Notes & White Papers (4)
- Product Change NoticePDF 169 KB Nov 17, 2022
- Product Change NoticePDF 121 KB PCN11113A Aug 13, 2012
- Product Change NoticePDF 120 KB PCN11113 Oct 31, 2011
Product Notices (PCN, EOL, etc) (3)
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