MCP3428-E/SL - 16-Bit 4-Channel ADC | Microchip
MPN： MCP3428-E/SL ✓ 啟用中MCP3428-E/SL 概覽
A delta-sigma ADC is a type of analog-to-digital converter that uses continuous-time oversampling and digital filtering to convert differential input voltages into high-resolution digital codes. Within the broader semiconductor hierarchy, the MCP3428 belongs to the ADC/DAC class and provides precision measurement functions for instrumentation, industrial controls, and low-frequency sensor acquisition.
The MCP3428-E/SL supports four differential channels, resolution up to 16 bits, and a precision 2.048 V on-board reference. Differential input range extends to plus or minus 2.048 V when the internal reference is used. Its 240 SPS maximum conversion rate is suited to slow-changing analog quantities rather than high-bandwidth waveform acquisition, while the low-noise architecture helps preserve accuracy in bridge, potentiometer, temperature, and pressure measurements.
Technically, the ADC combines delta-sigma conversion with an I2C-compatible control interface and onboard reference. Differential inputs reject common-mode noise when paired appropriately, and the internal reference reduces external-reference count in moderate-accuracy designs. The 2.7 V to 5.5 V supply range supports both 3.3 V and 5 V systems, although the selected interface voltage and available I2C bus limits must be checked during integration.
Typical uses include industrial pressure and temperature acquisition, low-rate strain and bridge conditioning, potentiometer position sensing, battery-cell monitoring, laboratory measurement, and environmental monitoring. For high-speed motor control, audio sampling, or wideband vibration analysis, a higher-rate SAR or sigma-delta converter would generally be more appropriate.
Designers should verify the input common-mode range and the datasheet configuration sequence before applying external signals. Place input and reference decoupling capacitors close to their pins, route analog inputs away from switching nodes, and confirm that I2C pull-up resistors satisfy the bus capacitance and rise-time requirements at the selected clock rate.
This page combines verified manufacturer and distributor information, structured specification gaps, a package-aware comparison, and practical integration guidance. It also distinguishes verified ordering variants from genuine pin-compatible replacements so engineers can assess interchangeability without assuming that a similar converter is automatically a drop-in substitute.
直接替換替代品，適用於 MCP3428-E/SL — 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。
此產品無可直接替換的替代品。
申請替代品MCP3428-E/SL 最大額定值與電氣特性
| Converter Type | Delta-sigma ADC |
| Number of Channels | 4 differential channels |
| 解析度 | Up to 16 bits |
| Maximum Conversion Rate | 240 samples/s |
| Internal Reference Voltage | 2.048 V |
| Differential Input Range | +/-2.048 V with internal reference |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Serial Interface | Two-wire I2C-compatible interface |
| 封裝 | 14-pin SOIC |
| Automotive Qualification | AEC-Q100 |
MCP3428-E/SL 14-pin soic 腳位配置指南
MCP3428-E/SL（14-pin soic 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： MCP3428-E/SL.
請參閱 資料表 以查看完整腳位配置。
典型應用
MCP3428-E/SL 適用於 6 應用s: Industrial Pressure and Temperature Acquisition, Bridge and Strain Sensor Measurement, Battery and Power-Cell Monitoring, Environmental and Laboratory Instrumentation, Position and Potentiometer Sensing, Automotive and Transportation Sensing.
Industrial Pressure and Temperature Acquisition
The MCP3428-E/SL fits slow-changing industrial measurements because it combines four differential inputs with up to 16-bit resolution and a 240 samples/s conversion rate. Differential connections help reject common-mode disturbance when each sensor is driven relative to a shared return or reference. Its onboard 2.048 V reference supports a +/-2.048 V differential range and reduces external component count, while the 2.7 V to 5.5 V supply range supports common 3.3 V and 5 V control systems. Use shielding, filtering, and careful ground routing around transducer leads, and confirm the datasheet common-mode limits before connecting the sensor.
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Bridge and Strain Sensor Measurement
The MCP3428-E/SL is appropriate for bridge-based strain, load, and pressure sensing when excitation drift changes slowly compared with the 240 samples/s conversion rate. Four differential channels allow multiple bridge outputs to be measured without adding separate converter packages, while the internal 2.048 V reference provides a defined full-scale reference for the converter. The design must remain within the verified +/-2.048 V differential input range and the device input common-mode limits. Place the converter away from motor drivers and relay contacts, and provide filtering appropriate to the bridge impedance and required measurement bandwidth.
推薦
Battery and Power-Cell Monitoring
The MCP3428-E/SL can support low-rate battery monitoring when multiple cell voltages or scaled sense signals are measured differentially. Its four-channel architecture reduces the number of ADC packages needed, while the 240 samples/s maximum rate is sufficient for energy-management variables that change gradually. The 2.048 V onboard reference allows the converter to operate without an external reference, and its single-supply operation can simplify systems already running from 3.3 V or 5 V. Engineers should verify input levels, isolation boundaries, and common-mode limits before connecting individual cells or high-voltage battery buses.
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Environmental and Laboratory Instrumentation
The MCP3428-E/SL is well matched to environmental monitors and laboratory instruments that measure multiple slowly varying voltages with modest wiring overhead. Four differential inputs can monitor temperature, humidity, light, or level-sensor outputs, while the 16-bit maximum resolution supports fine code widths when the frontend noise and reference error permit them. The 2.048 V internal reference defines a +/-2.048 V differential measurement span, and I2C connectivity supports integration with a controller or embedded system. For laboratory accuracy claims, characterize the complete signal chain and wait for digital-filter settling before capturing each conversion.
推薦
Position and Potentiometer Sensing
The MCP3428-E/SL can digitize potentiometer or other slowly moving position voltages where four channels and 16-bit maximum resolution are useful. The delta-sigma architecture performs digital filtering, which is advantageous when the desired measurement bandwidth is substantially below the 240 samples/s conversion capability. Using differential inputs can reduce sensitivity to shared ground offsets when the sensor and converter reference are arranged correctly. Keep traces short, provide an appropriate source impedance, and avoid routing the input directly beside switching regulators. The exact input common-mode and settling behavior must be checked before high-impedance source designs are released.
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Automotive and Transportation Sensing
The MCP3428-E/SL is identified by the verified Arrow listing as an AEC-Q100 automotive 14-pin SOIC device, making it relevant to transportation sensing platforms that evaluate low-rate, robust measurements. Four differential channels can support pressure, position, level, or redundant sensing nodes, and the converter's 240 samples/s rate suits slow-changing vehicle signals. Its 2.048 V onboard reference simplifies the measurement chain, while the 2.7 V to 5.5 V supply range supports embedded systems. Automotive implementation still requires confirmation of the exact temperature grade, qualification details, transient protection, ground architecture, and production traceability for the selected ordering code.
推薦
推薦產品摘要
工程參考資料，適用於 MCP3428-E/SL — 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 |
|---|---|
| Package | 14-pin SOIC |
| Brand | Microchip Technology |
| Converter Type | Delta-sigma ADC |
| Number of Channels | 4 differential channels |
| Resolution | Up to 16 bits |
| Maximum Conversion Rate | 240 samples/s |
| Internal Reference | 2.048 V |
| Differential Input Range | +/-2.048 V with internal reference |
| Supply Voltage | 2.7 V to 5.5 V |
| Serial Interface | Two-wire I2C-compatible interface |
| Automotive Qualification | AEC-Q100 |
| Verified Unit Price | $3.0747 as of 2026-10-30 |
主要差異化特點
- Four-channel differential measurement in one converter (對比MCP3424-E/SL)
- Integrated precision reference simplifies the conversion chain (對比MCP3425-E/SL)
- Single 2.7 V to 5.5 V supply operation (對比MCP3428-E/ST)
設計說明
Do not assume that similar MCP3424 or MCP3425-family products are pin-compatible with MCP3428-E/SL. The verified search results describe them only as comparable members of the Microchip portfolio and do not establish identical channel assignments or pin functions. Validate the complete 14-pin SOIC footprint, differential input range, reference implementation, supply constraints, I2C command map, and acquisition timing before approving a substitute. This caution also applies to automotive qualification and extended-temperature requirements.
Route the four analog inputs as short, quiet traces away from switching nodes, high-current inductors, and relay contacts. Place input filtering and bypass components near the MCP3428-E/SL pins, with the ground return arranged to minimize shared impedance between the converter and external sensor circuitry. Because the converter includes a 2.048 V reference, preserve stable reference behavior by avoiding aggressive copper daisy-chaining and by following the manufacturer layout and grounding recommendations.
Treat the I2C bus as a potentially noisy shared resource even though the MCP3428-E/SL uses a two-wire I2C-compatible interface. Select pull-up values from the actual bus capacitance, cable length, voltage level, and target clock rate rather than copying a default value. Keep the analog and digital return paths disciplined near the converter, and confirm settling time and digital-filter delay when measurements are triggered at a specific instant.
合規資訊
The verified Arrow product listing identifies MCP3428-E/SL as automotive AEC-Q100. No explicit RoHS, REACH, lead-free, halogen-free, or conflict-minerals statements were supplied, so those fields remain unknown.