MCP41010-E/P - 10kΩ SPI Digital Potentiometer | Microchip
MPN： MCP41010-E/P ✓ 啟用中MCP41010-E/P 概覽
A digital potentiometer is an integrated resistor network with an electronically adjustable wiper. It belongs to the potentiometer, variable-resistor, passive-interface, and semiconductor categories. Unlike a mechanical potentiometer, its position is set by serial data, allowing firmware to calibrate gain, balance a signal path, compensate for component variation, or control an adjustable resistance without physical user interaction.
The MCP41010 provides 256 wiper steps from its 8-bit control interface, with the wiper moving linearly through the 10 kΩ network. Its SPI interface supports straightforward integration with microcontrollers and other embedded controllers. The 8-PDIP package also makes the MCP41010-E/P practical for prototypes, educational systems, and through-hole industrial assemblies where a surface-mount package would be inconvenient.
The device is identified as a volatile digital potentiometer, meaning its wiper setting is not retained after power is removed. Software must restore the desired value after reset or power-up when repeatability matters. This characteristic separates it from digitally controlled potentiometers that include nonvolatile memory and support data retention.
Typical uses include audio volume and attenuation control, sensor-circuit calibration, programmable gain stages, laboratory test equipment, and embedded-control prototypes. In each case, the controller writes the desired tap position over SPI and the MCP41010 converts that value into a proportional wiper voltage or resistance relationship.
PCB design should keep the SPI traces short, provide a clean ground reference, and connect the unused end-terminal and wiper pins according to the manufacturer’s application guidance. Because the wiper state is volatile, firmware should establish the operating position immediately after reset. Confirming the exact pin functions, supply limits, electrical characteristics, and timing values is essential before committing a new design.
This page combines manufacturer-device facts, package-specific replacement guidance, direct application analysis, and engineering-focused comparison data to support component selection and board-level implementation.
直接替換替代品，適用於 MCP41010-E/P — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： MCP41010-E/P （相同外形與佔位） — 差異在於 Package.
MCP41010-I/P
✅ 直接替換聯絡詢價
查看資料表 →MCP41010T-I/P
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MCP41010T-E/P
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MCP41010-E/P 最大額定值與電氣特性
| Device Type | Single-channel digital potentiometer |
| 解析度 | 8 bit |
| Number of Wiper Taps | 256 taps |
| End-to-End Resistance | 10 kΩ |
| Serial Interface | SPI |
| Wiper Position Behavior | Linear |
| Memory Characteristic | Volatile |
| 封裝 | 8-PDIP |
| 安裝類型 | Through-hole |
| Channel Count | 1 channel |
| Wiper Adjustment | Digital control |
| Maximum Supply Current | 1 µA static maximum |
| Integral Nonlinearity | ±1 LSB maximum |
| Differential Nonlinearity | ±1 LSB maximum |
| SPI Clock Modes | Mode 0,0 and mode 1,1 |
MCP41010-E/P 8-pdip 腳位配置指南
MCP41010-E/P（8-pdip 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： MCP41010-E/P.
請參閱 資料表 以查看完整腳位配置。
典型應用
MCP41010-E/P 適用於 6 應用s: Digital Audio Attenuation, Sensor Signal Calibration, Programmable Gain Control, Embedded Test and Measurement, Microcontroller Learning Platform, Industrial Control Adjustment.
Digital Audio Attenuation
The MCP41010-E/P is well suited to software-controlled audio attenuation because it provides 256 linear wiper positions across a 10 kΩ end-to-end resistance. A microcontroller can update the attenuation through SPI while a suitable amplifier or divider converts the wiper voltage into a level adjustment. The nominal resolution is 8 bit, and maximum integral and differential nonlinearity are specified at ±1 LSB. Designers should account for the volatile wiper state by restoring the desired code after reset. They must also confirm the signal amplitude, impedance, bandwidth, and supply limits of the surrounding analog circuit so that the MCP41010 is not operated outside its electrical ratings.
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Sensor Signal Calibration
MCP41010-E/P can calibrate a sensor-conditioning circuit by changing resistance in a gain, offset, threshold, or balancing network. Its 256 linearly distributed wiper positions permit firmware to compensate for sensor variation or production calibration offsets, while SPI permits repeatable adjustment without a mechanical control. Across the nominal 10 kΩ network, one step corresponds to approximately 39 mΩ, before considering total resistance tolerance and load effects. Maximum integral and differential nonlinearity of ±1 LSB establish the principal resolution limits. The calibration algorithm should use the actual circuit transfer function rather than assuming perfectly linear endpoint behavior, especially when the wiper drives a high-impedance amplifier or a precision reference stage.
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Programmable Gain Control
The MCP41010-E/P can implement a digitally adjustable gain element when paired with a suitable analog amplifier. Firmware writes one of 256 wiper positions over SPI, allowing the controller to trim signal gain, implement selectable attenuation, or establish a calibrated operating point. The 10 kΩ end-to-end resistance gives the network a defined nominal impedance, while the 8-bit interface provides straightforward position encoding. The main design trade-off is loading: the effective resistance seen by the amplifier depends on the wiper topology, so the input impedance and signal path must be evaluated together. The volatile setting also means that a reset can alter the gain until firmware reloads the commanded value.
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Embedded Test and Measurement
MCP41010-E/P provides a digitally adjustable element for compact test fixtures, automated bench equipment, and instrument-control prototypes. SPI control allows a host controller to select one of 256 positions in a resistance divider, attenuator, excitation network, or balance circuit. The 8-PDIP package is especially convenient where the component must be assembled by through-hole techniques or used on a removable prototype board. Because the device has a nominal 10 kΩ path and ±1 LSB maximum nonlinearity, measurement accuracy depends on referencing the output through a high-impedance instrument. Firmware should record the commanded position and perform calibration when the system requires traceability across multiple channels.
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Microcontroller Learning Platform
MCP41010-E/P is useful in Arduino, ESP32, STM32, and other embedded-control tutorials because it converts SPI commands into a physical analog adjustment. Learners can illuminate an LED, vary a divider output, or observe the effect of 256 wiper positions with an oscilloscope or meter. Its 8-PDIP format is simple to place on a breadboard or through-hole training board. The 10 kΩ resistance and 8-bit resolution create an understandable relationship between a command byte and a proportional wiper position. Since the wiper state is volatile, the example program should restore the value after reset. A current-limiting resistor and protected supply arrangement are required when driving LEDs directly from a microcontroller pin.
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Industrial Control Adjustment
MCP41010-E/P can replace a mechanical adjustment potentiometer in an industrial control assembly where automatic trim, calibration, or runtime adjustment is required. SPI control avoids mechanical wear and lets a controller reproduce a saved operating setting after startup, although the MCP41010 itself does not retain that setting in nonvolatile memory. The 10 kΩ end-to-end resistance, 256 positions, and ±1 LSB maximum nonlinearity make the device suitable for moderate-resolution control tasks. Engineers should confirm that the selected E-grade ordering code covers the required ambient range and that the adjacent circuitry accommodates the device’s electrical limits. Mechanical mounting and connector stress should be assessed separately from the digital control function.
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推薦產品摘要
工程參考資料，適用於 MCP41010-E/P — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | MCP41010-I/P | MCP41010T-I/P | MCP41010T-E/P |
|---|---|---|---|---|
| Package | 8-PDIP | 8-PDIP | 8-PDIP | 8-PDIP |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Channel Count | 1 channel | 1 channel | 1 channel | 1 channel |
| Resolution | 8 bit | 8 bit | 8 bit | 8 bit |
| Number of Wiper Taps | 256 taps | 256 taps | 256 taps | 256 taps |
| End-to-End Resistance | 10 kΩ | 10 kΩ | 10 kΩ | 10 kΩ |
| Serial Interface | SPI | SPI | SPI | SPI |
| Wiper Position Behavior | Linear | Linear | Linear | Linear |
主要差異化特點
- Software-adjustable 256-position control (對比MCP41010-I/P)
- Single-channel 10 kΩ network in a through-hole package (對比MCP41010T-I/P)
- Linear wiper control over a defined resistance network (對比MCP41010T-E/P)
設計說明
Route CS, SI, SO, and SCK as a compact SPI group and provide a low-impedance ground return. Although the MCP41010-E/P is controlled digitally, the wiper and resistor terminals carry analog signals, so keep those connections away from noisy switching paths and high-current return currents. Check every package pin against the manufacturer’s 8-pin diagram before fabrication; the component listing confirms the 8-PDIP format but does not establish the individual pin functions.
Decode the 8-bit command carefully because the MCP41010-E/P has 256 wiper positions and a volatile setting. After reset, restore the required tap value before enabling the analog path or updating a gain-control system. A repeatable startup routine prevents the amplifier, loudspeaker, sensor signal, or test fixture from operating at an unintended wiper position while the controller is configuring the device.
Do not treat the nominal 10 kΩ end-to-end resistance as an exact constant across all operating conditions. Maximum integral and differential nonlinearity are ±1 LSB, and connected loads can alter the effective transfer function of a divider or wiper circuit. Validate the complete analog path with the intended source impedance, input capacitance, temperature range, and settling requirements instead of relying only on the 256-command resolution.
合規資訊
Compliance attributes are not stated in the manufacturer product-page excerpt or component listings. Confirm the current declarations for MCP41010-E/P with Microchip before release.
