特性
- Two XDCPs in one package
- 2-wire serial interface
- Register oriented format, 8 registers total
- Directly write wiper position
- Read wiper position
- Store as many as four positions per pot
- Instruction format
- Quick transfer of register contents to resistor array
- Direct write cell
- Endurance-100,000 writes per bit per register
- Resistor array values
- 2kΩ, 10kΩ, 50kΩ
- Resolution: 64 taps each pot
- 20 Ld plastic DIP and 20-lead SOIC packages
- Pb-free plus anneal available (RoHS compliant)
X9221A Functional Diagram
描述
The X9221A integrates two digitally controlled potentiometers (XDCP) on a monolithic CMOS integrated microcircuit. The digitally controlled potentiometer is implemented using 63 resistive elements in a series array. Between each element are tap points connected to the wiper terminal through switches. The position of the wiper on the array is controlled by the user through the 2-wire bus interface. Each potentiometer has associated with it a volatile Wiper Counter Register (WCR) and 2 nonvolatile Data Registers (DR0:DR1) that can be directly written to and read by the user. The contents of the WCR controls the position of the wiper on the resistor array through the switches. Power up recalls the contents of DR0 to the WCR. The XDCP can be used as a three-terminal potentiometer or as a two-terminal variable resistor in a wide variety of applications including control, parameter adjustments, and signal processing.
| Part Number | Status | Samples | Stock | RoHS | Package | Carrier Type | MOQ |
|---|---|---|---|---|---|---|---|
| X9221AWSIZ | Obsolete | N/A | In Stock | RoHS:EN | SOICW | Tube | 420 |
| X9221AWSIZT1 | Obsolete | N/A | In Stock | RoHS:EN | SOICW | Reel | 1000 |
| X9221AWSZ | Obsolete | N/A | In Stock | Contact | SOICW | Tube | 420 |
| X9221AWSZT1 | Obsolete | N/A | In Stock | Contact | SOICW | Reel | 1000 |
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- 涨价通告英语PDF 257 KB PIN19006 2019年3月01日
- 产品变更通告英语PDF 237 KB PCN13065 2013年12月24日
- 产品变更通告英语PDF 98 KB PCN12094 2012年12月19日
- 应用说明英语PDF 820 KB an1481 2008年10月03日AI 生成的摘要: This section explains using a Digital Control Potentiometer (DCP) for video gain control and cable compensation to maintain low noise and high image quality in video applications. It discusses the challenges of gain control, including parasitic capacitance and wiper resistance in the DCP, which affect bandwidth and gain stability at high frequencies. Solutions include adding resistors and capacitors to compensate for these parasitic effects, ensuring stable gain across the video frequency range. Simulation and test results confirm the effectiveness of these compensation techniques.
- 应用说明英语PDF 281 KB an1425 2008年5月22日AI 生成的摘要: 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.
- 应用说明英语PDF 750 KB an139 2005年6月30日AI 生成的摘要: The document details the design of power supplies using Intersil’s XDCP mixed signal products. It explains four key circuit schematics: Front End, Power Mesh, Secondary Control, and Primary Control, highlighting their interconnections. The Front End converts AC line power to an unregulated 320V DC, incorporating protection and EMI filtering components. The Power Mesh is a single switch forward DC/DC converter that regulates 320V DC to 12V DC at 10A, using a cascode transistor arrangement and a digitally controlled switching frequency to meet EMI requirements.
- 应用说明英语PDF 534 KB an133 2005年6月06日AI 生成的摘要: 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.
- 应用说明英语PDF 467 KB an1149 2005年5月03日AI 生成的摘要: The document details circuits using Intersil digitally controlled potentiometers (X9C103, X9312) combined with op amps (LT1226, OP37, LT1028) for applications like null adjustment, amplifier biasing, and proportional-integral temperature control. It explains modes controlled by NADJ/ADJ signals, automatic nulling via feedback loops, and bias stabilization in high-output buffer amplifiers. The circuits optimize gain, bandwidth, noise, and minimize distortion and power consumption. It also covers clocking options for nulling and temperature control using digital potentiometers and comparators.
- 应用说明英语PDF 280 KB an1157 2005年4月29日AI 生成的摘要: Digitally controlled potentiometers (XDCPs) enable precise power supply and DC to DC converter control by allowing cascading configurations for fine and coarse voltage adjustments. These devices store wiper settings in nonvolatile memory, ensuring long-term reliability and simplifying manufacturing and testing. XDCPs improve repeatability, reduce human error, and enhance resistance to environmental stress, making them superior to mechanical potentiometers in power applications.
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- 应用说明英语PDF 820 KB an1481 2008年10月03日AI 生成的摘要: This section explains using a Digital Control Potentiometer (DCP) for video gain control and cable compensation to maintain low noise and high image quality in video applications. It discusses the challenges of gain control, including parasitic capacitance and wiper resistance in the DCP, which affect bandwidth and gain stability at high frequencies. Solutions include adding resistors and capacitors to compensate for these parasitic effects, ensuring stable gain across the video frequency range. Simulation and test results confirm the effectiveness of these compensation techniques.
- 应用说明英语PDF 281 KB an1425 2008年5月22日AI 生成的摘要: 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.
- 应用说明英语PDF 750 KB an139 2005年6月30日AI 生成的摘要: The document details the design of power supplies using Intersil’s XDCP mixed signal products. It explains four key circuit schematics: Front End, Power Mesh, Secondary Control, and Primary Control, highlighting their interconnections. The Front End converts AC line power to an unregulated 320V DC, incorporating protection and EMI filtering components. The Power Mesh is a single switch forward DC/DC converter that regulates 320V DC to 12V DC at 10A, using a cascode transistor arrangement and a digitally controlled switching frequency to meet EMI requirements.
- 应用说明英语PDF 534 KB an133 2005年6月06日AI 生成的摘要: 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.
- 应用说明英语PDF 467 KB an1149 2005年5月03日AI 生成的摘要: The document details circuits using Intersil digitally controlled potentiometers (X9C103, X9312) combined with op amps (LT1226, OP37, LT1028) for applications like null adjustment, amplifier biasing, and proportional-integral temperature control. It explains modes controlled by NADJ/ADJ signals, automatic nulling via feedback loops, and bias stabilization in high-output buffer amplifiers. The circuits optimize gain, bandwidth, noise, and minimize distortion and power consumption. It also covers clocking options for nulling and temperature control using digital potentiometers and comparators.查看更多 (14)
应用说明和白皮书 (14)
- 涨价通告英语PDF 257 KB PIN19006 2019年3月01日
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