MCP41010-E/P - 10kΩ SPI Digital Potentiometer | Microchip
部品番号: MCP41010-E/P ✓ 生産中MCP41010-E/P 概要
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.
ドロップイン代替品: MCP41010-E/P — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: MCP41010-E/P （同一形状・フットプリント） — 相違点: Package.
MCP41010-I/P
✅ ドロップイン価格はお問い合わせください
データシートを見る →MCP41010T-I/P
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
MCP41010T-E/P
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
MCP41010-E/P 最大定格＆電気的特性
| Device Type | Single-channel digital potentiometer |
| 分解能 | 8 bit |
| Number of Wiper Taps | 256 taps |
| End-to-End Resistance | 10 kΩ |
| Serial Interface | SPI |
| Wiper Position Behavior | Linear |
| Memory Characteristic | Volatile |
| パッケージ | 8-PDIP |
| 実装タイプ | 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 ピン配置ガイド
MCP41010-E/P (8-pdip パッケージ) のピン配置。 ピン番号、機能、接続図はメーカーのデータシートで定義されています。正確なフットプリントとはんだ付けのガイドラインについては、データシートを参照してください。
詳細なピン配置データはありません: MCP41010-E/P.
詳細は データシート をご参照ください。
主な用途
MCP41010-E/P の用途: 6 件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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: MCP41010-E/P — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | 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 |
主な差別化要因
- Software-adjustable 256-position control （vs MCP41010-I/P)
- Single-channel 10 kΩ network in a through-hole package （vs MCP41010T-I/P)
- Linear wiper control over a defined resistance network （vs MCP41010T-E/P)
設計ノート
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.
コンプライアンス情報
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.
