MCP3428T-E/ST - 16-Bit 4-Channel ADC | Microchip
MPN： MCP3428T-E/ST ✓ 啟用中MCP3428T-E/ST 概覽
An ADC is an analog-to-digital converter, a data-converter IC that translates continuous voltage signals into numeric values for processing, measurement, logging, or control. Delta-sigma ADCs belong to the data-converter and mixed-signal semiconductor hierarchy. They are especially useful when low noise, high resolution, and good rejection of unwanted high-frequency energy matter more than very high sampling rates. The MCP3428 combines that conversion technique with differential inputs in a compact surface-mount package.
The device provides four differential-capable channels, selectable conversion speeds, and 16-bit output resolution. Its precision 2.048 V reference simplifies system design when an external precision reference is unnecessary. The I2C interface reduces the number of signal lines required to connect the converter to a microcontroller or embedded controller. These features make the part suitable for industrial process measurement, low-level sensor acquisition, portable instrumentation, and precision analog monitoring systems.
The MCP3428 uses a sigma-delta conversion architecture, which supports accurate measurement of slowly changing or low-bandwidth signals while offering digital averaging benefits. Differential inputs can reject common-mode voltage and noise when the source is arranged with paired signal connections. Engineers should still account for the source impedance, acquisition settling behavior, reference accuracy, input filtering, and conversion time when interpreting the results. The converter's low-rate measurement focus is more important for process and sensor signals than for waveform capture.
Typical applications include industrial pressure and temperature monitoring, laboratory measurement equipment, battery-powered data acquisition, environmental sensors, and low-frequency closed-loop control. Differential excitation also benefits bridge sensors and current-sense systems where rejecting common-mode disturbance improves measurement integrity. The 14-TSSOP package supports compact PCB layouts, although correct decoupling and quiet analog routing remain essential.
Place the reference and analog input routing in accordance with the manufacturer datasheet, and use separate analog and digital return paths to minimize converter and digital-switching noise. Confirm the selected conversion rate against the required response time because faster conversion settings may not preserve the same noise performance as the slowest settings. This page combines the manufacturer specifications, sourcing guidance, application analysis, and drop-in replacement limitations into a practical engineering reference.
直接替換替代品，適用於 MCP3428T-E/ST — 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： MCP3428T-E/ST （相同外形與佔位） — 差異在於 Resolution.
MCP3428-E/ST
✅ 直接替換聯絡詢價
查看資料表 →MCP3428T-E/ST 最大額定值與電氣特性
| 解析度 | 16 bit |
| Number of Input Channels | 4 channels |
| Conversion Architecture | Delta-sigma |
| Maximum Conversion Rate | 240 samples per second |
| Input Type | Differential |
| Onboard Reference Voltage | 2.048 V |
| Differential Input Range | ±2.048 V |
| Digital Interface | Two-wire I2C |
| 封裝 | 14-TSSOP |
| 安裝類型 | Surface mount |
| Packaging | Tape and reel |
| Signal Type | Analog input |
| Converter Category | ADC/DAC data converter |
| Digital Output Resolution | 16 bit |
MCP3428T-E/ST 14-tssop 腳位配置指南
MCP3428T-E/ST（14-tssop 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： MCP3428T-E/ST.
請參閱 資料表 以查看完整腳位配置。
典型應用
MCP3428T-E/ST 適用於 6 應用s: Industrial Process Monitoring, Low-Level Sensor Acquisition, Precision Instrumentation, Battery-Powered Data Acquisition, Environmental Monitoring, Bridge and Current-Sense Measurement.
Industrial Process Monitoring
The MCP3428T-E/ST fits industrial process measurement because it combines four differential inputs with 16-bit resolution and conversion rates up to 240 samples per second. Connect pressure, temperature, or level transducer outputs to balanced differential channels so common-mode voltage and ground noise are reduced. The 2.048 V onboard reference supports a ±2.048 V differential measurement range, while the I2C interface allows a controller to configure conversion speed and retrieve results over two wires. Because this is a precision, low-bandwidth converter rather than a waveform sampler, use input filtering and settling time appropriate to each sensor’s bandwidth.
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Low-Level Sensor Acquisition
The MCP3428T-E/ST is appropriate for low-level analog sensors whose output fits within a ±2.048 V differential range. Its four-channel architecture allows multiple transducers to share one converter, while differential input connections help reject common-mode disturbance. The 16-bit delta-sigma conversion system and selectable conversion speeds are useful for temperature, force, pressure, and chemical-sensor monitoring. Design the analog front end with balanced source impedances, short traces, and local decoupling, and verify the conversion rate and settling behavior required by the sensor rather than treating the 240-sample-per-second maximum as a universal operating point.
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Precision Instrumentation
The MCP3428T-E/ST supports compact laboratory and test instruments that need accurate acquisition without a high-speed parallel data bus. Its 16-bit resolution captures fine changes in slowly varying analog quantities, and the onboard 2.048 V reference simplifies reference management. Four differential channels can measure multiple inputs while reducing common-mode coupling. The I2C connection also lowers wiring complexity in multichannel instruments. For a usable instrument design, pair the converter with stable sensor excitation, careful grounding, input protection, and calibration. Select the conversion speed according to the measurement bandwidth and noise target because speed and output noise are linked design choices.
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Battery-Powered Data Acquisition
The MCP3428T-E/ST is useful in portable data-acquisition equipment where a compact, low-bandwidth analog front end is required. Four channels reduce the number of separate converters needed when sampling several slow sensor signals. The two-wire I2C interface conserves host-controller pins, and the converter’s available 15 and 240 samples-per-second operating points allow designers to balance response time with noise performance. In a battery-powered design, check the complete operating-current behavior and configure the conversion rate deliberately so the system does not spend unnecessary energy acquiring data faster than the application consumes it.
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Environmental Monitoring
The MCP3428T-E/ST can digitize outputs from environmental sensors such as temperature, humidity, gas, and light detectors when their analog levels fall within the supported differential range. Its four differential channels support multiple sensing points, and the 16-bit resolution provides detailed numerical readings for logging and trend analysis. The onboard 2.048 V reference helps simplify remote sensor modules that cannot conveniently carry a precision external reference. Keep the analog input section away from switching regulators and digital communication traces, use balanced routing where possible, and confirm the converter’s supply-voltage limits from the manufacturer documentation before defining the complete module.
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Bridge and Current-Sense Measurement
The MCP3428T-E/ST suits differential bridge or current-sense measurements where rejecting common-mode voltage improves signal integrity. Driving each measurement through the positive and negative input of a channel allows the converter to observe the differential result directly. Sixteen-bit resolution supports fine measurement steps, and the 2.048 V reference corresponds to a ±2.048 V differential range. The signal bandwidth must remain within the selected conversion mode, and the source impedance must permit the internal acquisition circuitry to settle between samples. Keep shunt or bridge returns separated from digital return current until they join at the converter’s quiet analog-ground reference.
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推薦產品摘要
工程參考資料，適用於 MCP3428T-E/ST — 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 | MCP3428-E/ST |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Package | 14-TSSOP | 14-TSSOP |
| Resolution | 16 bit | 16 bit |
| Number of Input Channels | 4 channels | 4 channels |
| Conversion Architecture | Delta-sigma | Delta-sigma |
| Maximum Conversion Rate | 240 samples per second | 240 samples per second |
| Onboard Reference Voltage | 2.048 V | 2.048 V |
| Differential Input Range | ±2.048 V | ±2.048 V |
| Digital Interface | Two-wire I2C | Two-wire I2C |
| Ordering-Code Difference | T designation in complete ordering code | Base-family ordering code |
主要差異化特點
- Four-channel integration in one converter (對比MCP3428-E/ST)
- Differential measurement with integrated precision reference (對比MCP3428-E/ST)
- Compact two-wire digital interface (對比MCP3428-E/ST)
設計說明
Route the four analog input channels as tightly coupled differential pairs and keep them away from I2C switching traces, inductors, and switching-regulator outputs. Place the converter’s decoupling capacitors close to their corresponding supply and ground pins. If the analog source has appreciable impedance, keep the connection short and symmetrical so both inputs settle at the same rate. The manufacturer package drawing and pin table should govern the final footprint and exposed connections.
Treat analog return current as part of the measurement loop rather than connecting it casually to the broadest available ground plane. Use a quiet analog reference for sensor returns and keep switching current from relays, LEDs, and power converters out of that path. Differential inputs help reject common-mode noise, but they do not correct mismatched routing or unequal source impedances. Validate the assembled board by measuring noise and conversion accuracy with the intended sensor and cable.
Do not select the conversion speed solely from the 240-sample-per-second maximum. Faster operation can produce a different noise and settling profile from slower settings, while slow sensor outputs rarely benefit from continuous maximum-rate conversion. Confirm the selected rate against the application bandwidth, allow the input network to settle between conversions, and use the manufacturer timing information when calculating update intervals.
合規資訊
Request the current manufacturer material-compliance declarations for the exact ordering code before production release.
