MCP3423T-E/UN - 18-Bit Dual-Channel Delta-Sigma ADC | Microchip Technology
N.º da peça: MCP3423T-E/UN ✓ AtivoMCP3423T-E/UN Visão geral
The MCP3423 is part of the MCP342X family of delta-sigma ADCs designed for precision signal acquisition. A delta-sigma ADC converts an analog input by oversampling and digital filtering, which is useful when the application requires high resolution and good noise performance at relatively low conversion rates. The MCP3423 supports up to 18 bits of resolution and conversion rates up to 240 SPS, according to the manufacturer product information.
Key features include two differential channels, a 2.048 V onboard reference, automatic calibration, power-on reset, and a two-wire I²C-compatible interface. The differential input architecture helps reject common-mode noise when measuring low-level sensor outputs. The internal reference establishes a nominal differential input range of ±2.048 V, while the converter's low-noise architecture is intended for applications requiring accurate measurement of slowly changing analog quantities.
The device uses an I²C-compatible serial interface to transfer conversion results to a microcontroller or other digital controller. Configuration registers control the conversion cycle, input channel selection, gain, and operating mode. Because the converter is designed for low-rate precision measurement rather than high-speed waveform capture, its conversion timing should be considered in applications where latency or dynamic signal bandwidth is important.
Typical applications include pressure and temperature sensor interfaces, current sensing, bridge-transducer measurement, industrial process monitoring, and low-rate instrumentation. Differential inputs are particularly useful with resistive sensors whose outputs are referenced around a common midpoint. The internal reference is advantageous in compact systems where space, component count, and calibration complexity are constrained.
When laying out the circuit, route the analog inputs away from digital switching nodes and keep the input connections short. The supply and ground pins require effective bypassing close to the device, and the exposed-pad or thermal considerations should follow the package-specific land pattern in the manufacturer datasheet. Verify the conversion time, gain, reference configuration, and I²C address before finalizing the firmware. This page also organizes the device specifications, replacement considerations, and application guidance for faster engineering evaluation.
Alternativas drop-in para MCP3423T-E/UN — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com MCP3423T-E/UN (mesmo formato e footprint) — diferindo em Digital Interface, Number of Input Channels.
MCP3423-E/UN
✅ Drop-InConsulte o preço
Ver ficha técnica →MCP3423T-E/UN Classificações máximas e características elétricas
| Resolução | 18 bits |
| Number of Input Channels | 2 differential channels |
| Converter Architecture | Delta-sigma |
| Maximum Conversion Rate | 240 SPS |
| Onboard Reference Voltage | 2.048 V |
| Differential Input Range | ±2.048 V |
| Tensão de alimentação | 3.3 V to 5 V |
| Digital Interface | I²C-compatible, 2-wire serial |
| Input Type | Differential |
| Automatic Calibration | Yes |
| Power-On Reset | Yes |
| Faixa de temperatura de operação | -40°C to +125°C |
| Encapsulamento | 10-MSOP |
| Tipo de montagem | Surface mount |
| Packaging | Tape and reel |
| Taxa de amostragem | 3.75 SPS to 240 SPS |
| Data Interface | I²C, serial |
| Status RoHS | Not stated in the retrieved product information |
| REACH Status | Not stated in the retrieved product information |
| AEC-Q100 Qualification | Not applicable or not stated |
Guia de Configuração de Pinos do MCP3423T-E/UN 10-msop
Configuração de pinos para MCP3423T-E/UN (pacote 10-msop). Este componente analógico possui pinos de entrada, saída e alimentação. Consulte o datasheet do fabricante para configurações de offset null, compensação e pino de enable. Ideal para circuitos de condicionamento de sinal e amplificadores.
Nenhum dado detalhado de pinagem disponível para MCP3423T-E/UN.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
MCP3423T-E/UN é adequado para 6 aplicaçãos: Temperature Sensor Acquisition, Pressure and Bridge Transducer Measurement, Industrial Process Monitoring, Current Sensing and Load Monitoring, Battery-Powered Instrumentation, Precision Sensor Interface Module.
Temperature Sensor Acquisition
The MCP3423T-E/UN fits temperature sensing with RTDs, thermistors, or resistive bridges because its two differential channels can monitor sensor outputs while rejecting common-mode noise. The 18-bit resolution provides fine digital code spacing, and the 240 SPS maximum rate is more than adequate for typical thermal time constants. Connect the sensor to the differential inputs, use the internal 2.048 V reference where appropriate, and place input filtering close to the converter to preserve accuracy.
Recomendado
Pressure and Bridge Transducer Measurement
Pressure cells and strain-gauge bridges commonly produce small differential signals riding on a common-mode voltage, making the MCP3423T-E/UN's differential inputs a practical fit. Its 18-bit delta-sigma conversion and onboard 2.048 V reference support high-resolution readings without an external reference device. For best results, keep the bridge excitation and analog input routing quiet, verify the selected gain against the sensor output, and allow time for the conversion filter to settle before reading each result.
Recomendado
Industrial Process Monitoring
The MCP3423T-E/UN can monitor two slow-changing process variables such as tank level, valve position, or analog pressure in an industrial controller. Its 240 SPS maximum conversion rate is appropriate for supervisory measurements, while the differential inputs help reject noise coupled into long sensor cables. Use the I²C-compatible interface to read results from a microcontroller, implement timeout and status checks in firmware, and isolate analog inputs from motor, relay, and switching-power stages.
Recomendado
Current Sensing and Load Monitoring
A shunt amplifier or differential current sensor can feed the MCP3423T-E/UN to create a compact high-resolution current measurement channel. The two differential inputs allow the controller to monitor two related currents, such as load current and return current, while the 18-bit resolution helps detect small changes. A 240 SPS rate is sufficient for energy-management and protection functions that do not require waveform capture. Keep shunt and amplifier paths away from high-current edges to prevent conversion errors.
Recomendado
Battery-Powered Instrumentation
The low-rate precision conversion profile of the MCP3423T-E/UN makes it useful in portable measurement systems that periodically sample sensors rather than continuously capture waveforms. Its two differential channels, onboard 2.048 V reference, and I²C-compatible interface reduce the number of external support components in a compact embedded instrument. Firmware can power the converter, wait for the specified conversion sequence, read the result, and return the bus to an idle state to reduce system energy use.
Recomendado
Precision Sensor Interface Module
The MCP3423T-E/UN can serve as the conversion element in a dedicated sensor-interface module exposing two high-resolution differential measurements to a host controller. The onboard reference simplifies module-level design, while the I²C-compatible interface allows straightforward connection to embedded Linux, PLC, or microcontroller peripherals. Provide protection against sensor-cable transients, use a stable low-noise supply, and validate the full calibration chain from sensor excitation through conversion if long-term measurement accuracy is critical.
Recomendado
Dados de referência de engenharia para MCP3423T-E/UN — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | MCP3423-E/UN |
|---|---|---|
| Package | 10-MSOP | 10-MSOP |
| Brand | Microchip Technology | Microchip Technology |
| Resolution | 18 bits | 18 bits |
| Input Channels | 2 differential channels | 2 differential channels |
| Maximum Conversion Rate | 240 SPS | 240 SPS |
| Onboard Reference | 2.048 V | 2.048 V |
| Differential Input Range | ±2.048 V | ±2.048 V |
| Interface | I²C-compatible 2-wire serial | I²C-compatible 2-wire serial |
Principais diferenciais
- Two differential inputs in a compact 10-MSOP footprint (vs MCP3424T-E/ST)
- Onboard precision reference simplifies the analog system (vs MCP3426A7T-E/MS)
- Direct same-family ordering alternative (vs MCP3423-E/UN)
Notas de projeto
Keep the MCP3423T-E/UN analog input traces short, guarded by a ground reference, and separated from switching-node copper. Place input filtering capacitors at the ADC pins and place supply bypass capacitors immediately across the device supply pins. A quiet analog ground return path is particularly important because the converter resolves low-level differential signals. Follow the package-specific land pattern and exposed-pad connection guidance in the manufacturer datasheet.
Configure the converter for a conversion rate that matches the signal bandwidth. The MCP3423T-E/UN supports up to 240 SPS, so high-frequency or transient content should be filtered before the inputs rather than relying on the ADC to reject it. Differential routing with matched impedance and symmetrical sensor connections improves common-mode rejection. Validate the analog filter and acquisition timing together in firmware to avoid aliasing or incomplete settling.
Do not treat the MCP3423T-E/UN as a high-speed sampling ADC: its 240 SPS maximum rate is intended for slow-changing sensor measurements. Check the channel-selection, gain, conversion-cycle, and status-register sequence in the manufacturer documentation before writing firmware. Also verify that the external supply and reference arrangement respects the absolute maximum ratings, and do not assume that the onboard 2.048 V reference removes the need for calibration or analog protection.
Informações de conformidade
The retrieved product information does not state RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive-qualification status for this exact MPN. Confirm the current declarations with Microchip or the authorized supply chain before regulatory submission.
