MCP3424-E/ST - 18-Bit Quad-Channel Delta-Sigma ADC | Microchip Technology
N.º da peça: MCP3424-E/ST ✓ AtivoMCP3424-E/ST Visão geral
A delta-sigma ADC is a sigma-delta analog-to-digital converter that uses oversampling, noise shaping, and digital filtering to convert a differential analog input into a high-resolution digital code. In the signal-chain hierarchy, the MCP3424-E/ST is an ADC, specifically a low-frequency precision delta-sigma ADC within the broader data-converter and semiconductor categories. Its differential input architecture helps reject common-mode noise when paired with suitable sensor and instrumentation amplifiers.
The MCP3424 family provides up to 18-bit resolution, four input channels, a low-noise architecture, and an onboard 2.048 V precision reference that enables a differential input range of ±2.048 V according to the manufacturer product information. The I2C-compatible interface allows the converter to connect efficiently to embedded controllers while consuming relatively few external pins. The 14-TSSOP package also makes the device suitable for compact instrumentation equipment.
Typical uses include pressure and temperature acquisition, industrial process monitoring, laboratory measurement, portable instrumentation, and sensor interfaces where low-frequency measurements are more important than high conversion speed. The differential inputs and integrated reference help simplify analog front-end design while preserving measurement resolution. The 2.7 V to 5.5 V operating range supports both 3.3 V and 5 V systems.
When designing around the MCP3424-E/ST, confirm the analog input range, common-mode limits, reference configuration, digital interface voltage, and conversion timing against the manufacturer datasheet. Place input filtering and decoupling close to the device, and account for the 3.75 SPS conversion rate when defining sample timing. This page combines verified distributor information, manufacturer details, package information, practical application guidance, and clearly qualified replacement options.
Alternativas drop-in para MCP3424-E/ST — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
MCP3423-E/ST
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
MCP3422-E/ST
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
MCP3421-E/ST
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
MCP3424-E/ST Classificações máximas e características elétricas
| ADC Resolution | 18 bits |
| Number of Input Channels | 4 channels |
| Input Type | Differential |
| Conversion Architecture | Delta-sigma, 1 sigma-delta converter |
| Taxa de amostragem | 3.75 SPS |
| Integrated Reference Voltage | 2.048 V |
| Differential Input Range | ±2.048 V |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Supply Type | Single supply |
| Digital Interface | Two-wire I2C-compatible serial interface |
| Encapsulamento | 14-TSSOP |
| Contagem de pinos | 14 pins |
| Tipo de montagem | Surface mount |
Guia de Configuração de Pinos do MCP3424-E/ST 14-tssop
Configuração de pinos para MCP3424-E/ST (pacote 14-tssop). 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 MCP3424-E/ST.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
MCP3424-E/ST é adequado para 6 aplicaçãos: Precision Temperature Acquisition, Pressure and Load Measurement, Industrial Process Monitoring, Portable Environmental Instrumentation, Laboratory Sensor Interface, Battery-Powered Sensor Node.
Precision Temperature Acquisition
The MCP3424-E/ST fits low-speed temperature measurement because it provides up to 18-bit resolution, four differential input channels, and a 3.75 SPS conversion rate. Each channel can be paired with a suitable bridge or resistive sensor front end, while the integrated 2.048 V reference supports a differential input range of ±2.048 V. Differential sensing can reduce common-mode pickup when the sensor and converter share a grounded measurement environment. The design trade-off is conversion latency: temperature changes are tracked effectively, but the converter is not intended for rapid thermal transients.
Recomendado
Pressure and Load Measurement
For pressure cells, load cells, and resistive bridges, the MCP3424-E/ST offers 18-bit resolution across four differential channels at approximately 3.75 SPS. The integrated 2.048 V reference provides a defined basis for ratiometric or referenced bridge measurements, while differential inputs help suppress offset and common-mode errors. Engineers should place protection, filtering, and instrumentation-amplifier stages close to the sensor to limit noise pickup. Because the conversion rate is low, the part is best suited to static force measurements and slow mechanical loading rather than impact or vibration analysis.
Recomendado
Industrial Process Monitoring
The MCP3424-E/ST can monitor up to four slowly changing process signals through its differential inputs, making it appropriate for pressure, level, flow-derived voltage, and other instrumentation signals. A 3.75 SPS rate provides filtered measurements without the complexity of a high-speed ADC, while the 2.7 V to 5.5 V supply range supports embedded industrial controller rails. Differential wiring reduces susceptibility to shared ground potential differences when properly designed. The primary design consideration is ensuring that every sensor source remains within the converter's specified common-mode and analog input limits.
Recomendado
Portable Environmental Instrumentation
For handheld or battery-oriented environmental instruments, the MCP3424-E/ST combines four measurement channels, 18-bit resolution, and an integrated 2.048 V reference in a 14-TSSOP package. The integrated reference can reduce the number of external precision components, while the low 3.75 SPS rate permits longer conversion intervals and power-management opportunities. The device is best used for ambient temperature, humidity, pressure, or gas-sensor outputs that change slowly. Firmware should schedule conversions around the documented 3.75 SPS rate and account for digital-filter settling behavior.
Recomendado
Laboratory Sensor Interface
The MCP3424-E/ST is suitable for laboratory measurement fixtures that require high numeric resolution and differential input flexibility but operate below a few samples per second. Four channels allow one converter to serve multiple resistive or voltage-based sensors, while the I2C-compatible interface supports connection to a microcontroller, USB interface, or embedded control board. The ±2.048 V differential range must be checked against the signal source. For very low-level signals, an appropriate low-noise amplifier and filtering network are still required before the ADC input.
Recomendado
Battery-Powered Sensor Node
The MCP3424-E/ST can support a low-duty-cycle battery-powered sensor node because it combines four channels with a relatively slow 3.75 SPS conversion rate. The host controller can activate the converter, collect measurements over I2C, and place the system back into a low-power state between samples. The integrated 2.048 V reference and single 2.7 V to 5.5 V supply operation simplify low-voltage designs. Leakage current, conversion energy, and reference warm-up behavior are not present in the supplied excerpts and should be reviewed in the datasheet before estimating battery life.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para MCP3424-E/ST — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | MCP3423-E/ST | MCP3422-E/ST | MCP3421-E/ST |
|---|---|---|---|---|
| Package | 14-TSSOP | 14-TSSOP | 14-TSSOP | 14-TSSOP |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| ADC Resolution | 18 bits | 18 bits | 18 bits | 18 bits |
| Conversion Architecture | Delta-sigma | Delta-sigma | Delta-sigma | Delta-sigma |
Principais diferenciais
- Four-channel measurement capability (vs MCP3423-E/ST)
- Integrated precision reference (vs MCP3422-E/ST)
- Four-channel differential acquisition (vs MCP3421-E/ST)
Notas de projeto
Place the MCP3424-E/ST bypass capacitor and analog input protection components close to their corresponding device pins. Keep the two-wire interface traces short and route them away from analog input and reference nodes. Differential input traces should be routed as a closely matched pair, with a continuous ground reference beneath or beside the pair, to reduce pickup and conversion error.
The MCP3424-E/ST is a low-speed converter, but analog filtering still determines practical measurement noise. Place an appropriate input filter near the ADC pins, account for the sensor source impedance, and verify that the network does not create an unacceptable settling time between 3.75 SPS conversions. Use the integrated 2.048 V reference only when its accuracy and noise meet the measurement requirement.
Do not treat the MCP3424-E/ST as a high-speed ADC; its verified conversion rate is approximately 3.75 SPS. Also do not assume every MCP342X member is interchangeable in firmware because the number of usable channels differs. Before substitution, compare the physical pin functions, channel configuration, reference behavior, supply range, and digital measurement sequence in the manufacturer datasheet.
Use a clean single supply within the verified 2.7 V to 5.5 V range and follow the manufacturer's recommended decoupling network. The I2C pull-up voltage should match the interface domain used by the connected controller. Review quiescent current, conversion current, and reference current in the datasheet before calculating battery life or thermal performance for a portable instrument.
Informações de conformidade
The supplied source snippets do not provide explicit compliance declarations. Compliance status must be confirmed using the manufacturer product page and current material declaration records.
