Features
- Four Potentiometers in One Package
- 256 Resistor Taps - 0.4% Resolution
- I2C Serial Interface
- Three address pins, up to eight devices/bus
- Wiper Resistance: 70Ω Typical at 3.3V
- Non-Volatile Storage of Wiper Position
- Standby Current <5µA Max
- Power Supply: 2.7V to 5.5V
- 50kΩ, 10kΩ Total Resistance
- High Reliability
- Endurance: 150,000 data changes per bit per register
- Register data retention: 50 years at T ≤75 °C
- 20 Ld TSSOP
- Pb-Free Plus Anneal Available (RoHS Compliant)
X95840 Functional Diagram
Description
The X95840 integrates four digitally controlled potentiometers (XDCP™) 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 is 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 control the position of the wiper. At power up the device recalls the contents of the four DCP's IVR to the corresponding WRs. The DCPs can be used as three-terminal potentiometers or as two-terminal variable resistors in a wide variety of applications including control, parameter adjustments, and signal processing.
| Part Number | Status | Samples | Stock | Package | Budgetary Price (USD) | Carrier Type | Moisture Sensitivity Level (MSL) | Country of Assembly | Country of Wafer Fabrication |
|---|---|---|---|---|---|---|---|---|---|
| X95840UV20IZ-2.7 | Last Time Buy | Available | In Stock | TSSOP | 1ku | $9 | Tube | 3 | MALAYSIA, THAILAND | SINGAPORE |
| X95840UV20IZ-2.7T1 | Last Time Buy | Available | In Stock | TSSOP | 1ku | $9 | Reel | 3 | MALAYSIA, THAILAND | SINGAPORE |
| X95840WV20IZ-2.7 | Last Time Buy | Available | In Stock | TSSOP | 1ku | $9.34 | Tube | 3 | MALAYSIA, THAILAND | SINGAPORE |
| X95840WV20IZ-2.7T1 | Last Time Buy | Available | In Stock | TSSOP | 1ku | $9.34 | Reel | 3 | MALAYSIA, THAILAND | SINGAPORE |
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- Manual - Development ToolsPDF 2.16 MB AN1555 Sep 17, 2025
- Price Increase NoticePDF 257 KB PIN19006 Mar 01, 2019
- 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 534 KB an133 Jun 06, 2005AI-generated Summary: The document explains how digitally controlled potentiometers (XDCPs) enable programmability in amplifier circuits by adjusting cutoff frequency and gain. It details the design of a non-inverting amplifier with variable resistors forming an RC low pass filter and gain control. Techniques to reduce potentiometer resistance for high-frequency applications are described, allowing gain from 1 to 2 and cutoff frequency from 130kHz to over 1MHz. The amplifier’s parameters are controlled via a serial bus, enabling computer-based customization.
- 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 513 KB an1173 Jan 19, 2004AI-generated Summary: The document explains how to trim DC/DC converter modules and discrete circuits using digital potentiometers (DCPs) like the ISL95810UIU8. It details resistor values for DOSA and Vicor modules, showing how DCPs adjust output voltage within a ±10% range by changing code values. It also covers output voltage setting and margining techniques for POLA and DOSA modules using external resistors and FETs, highlighting that replacing these with DCPs enables software-controlled voltage adjustment with multiple steps.
- 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 534 KB an133 Jun 06, 2005AI-generated Summary: The document explains how digitally controlled potentiometers (XDCPs) enable programmability in amplifier circuits by adjusting cutoff frequency and gain. It details the design of a non-inverting amplifier with variable resistors forming an RC low pass filter and gain control. Techniques to reduce potentiometer resistance for high-frequency applications are described, allowing gain from 1 to 2 and cutoff frequency from 130kHz to over 1MHz. The amplifier’s parameters are controlled via a serial bus, enabling computer-based customization.
- 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 513 KB an1173 Jan 19, 2004AI-generated Summary: The document explains how to trim DC/DC converter modules and discrete circuits using digital potentiometers (DCPs) like the ISL95810UIU8. It details resistor values for DOSA and Vicor modules, showing how DCPs adjust output voltage within a ±10% range by changing code values. It also covers output voltage setting and margining techniques for POLA and DOSA modules using external resistors and FETs, highlighting that replacing these with DCPs enables software-controlled voltage adjustment with multiple steps.
- 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.View More (6)
Application Notes & White Papers (6)
- Price Increase NoticePDF 257 KB PIN19006 Mar 01, 2019
- Product Change NoticePDF 121 KB PCN11113A Aug 13, 2012
- Product Change NoticePDF 120 KB PCN11113 Oct 31, 2011
Product Notices (PCN, EOL, etc) (5)
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Knowledge Base
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What is the default wiper tap position for X95820 and X95840 DCPs?
Question:What is the default wiper tap position for these parts? Answer: X95820 and X95840: The default wiper tap position is 0.
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