MCP3423-E/MF - 18-Bit Dual-Channel Delta-Sigma ADC | Microchip
MPN: MCP3423-E/MF ✗ Cuối đờiMCP3423-E/MF Tóm tắt
A delta-sigma ADC is an analog-to-digital converter that uses oversampling, digital filtering, and noise shaping to produce high-resolution conversion results from low-frequency analog signals. It belongs to the ADC > analog-to-digital converter > data-converter IC > semiconductor hierarchy. Compared with flash and successive-approximation ADCs, this architecture is particularly effective when high resolution and good rejection of low-frequency noise matter more than very high sampling rates.
The MCP3423-E/MF provides up to 18 bits of resolution across two analog input channels. Differential inputs support measurement of voltage differences, which is valuable when sensor outputs are referenced to a remote or noisy ground. The on-board 2.048 V precision reference establishes the converter's scale without requiring an external reference. Power-on reset and automatic calibration simplify initial system operation, while the 2.7 V to 5.5 V supply range supports both 3.3 V and 5 V systems.
The converter uses a sigma-delta architecture and an I2C digital interface. Its 4 samples-per-second conversion capability is suitable for slowly changing industrial, environmental, and instrumentation signals rather than high-bandwidth waveform capture. The 10-DFN 3x3 mm package also reduces board footprint, although the exposed-pad construction and differential signal requirements demand careful layout and thermal design.
Typical applications include 4-20 mA process-loop measurement, bridge-based pressure sensing, low-level voltage acquisition, environmental monitoring, and precision laboratory instrumentation. Differential excitation and conversion of the resulting small voltage difference can improve common-mode rejection. The 18-bit resolution is also useful when a sensor output represents only a small portion of the converter's differential input range.
Designers should place input and reference-related connections for minimal signal-loop area, provide suitable bypass capacitance, and route the differential pair away from switching nodes. The package's compact thermal land pattern should be connected to the ground plane as directed by Microchip's package documentation. Because the verified product data identifies a 10-DFN package but does not provide its complete numbered pin map, the pinout is intentionally left null.
This page combines verified manufacturer and distributor information with application guidance, purchasing context, and engineering-focused comparisons. It also distinguishes verified technical facts from attributes that still require confirmation from the complete Microchip datasheet before layout or production release.
Bộ thay thế dễ dàng lắp đặt cho MCP3423-E/MF — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Không có bộ thay thế dễ dàng lắp đặt sẵn có cho sản phẩm này.
Yêu cầu các bộ thay thếMCP3423-E/MF Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 18 bits |
| Input Channel Count | 2 channels |
| Architecture | Delta-sigma |
| Input Configuration | Differential |
| Internal Reference Voltage | 2.048 V |
| Differential Input Range | ±2.048 V |
| Full-Scale Range with PGA | 4.096 V |
| Conversion Rate | 4 samples per second |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Digital Interface | I2C |
| Power-On Reset | Supported |
| Automatic Calibration | Supported |
| Khoảng nhiệt độ hoạt động | -40 °C to +125 °C |
| Hộp | 10-DFN (3x3 mm) |
| Kiểu lắp đặt | Surface mount |
Hướng dẫn cấu hình chân MCP3423-E/MF 10-dfn (3x3 mm)
Cấu hình chân cho MCP3423-E/MF (10-dfn (3x3 mm) gói). Thành phần số hiệu này có chân đầu vào, đầu ra và nguồn cung cấp. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết cấu hình chân bù, bù trừ và chân kích hoạt. Hoàn hảo cho điều kiện tín hiệu và mạch khuếch đại.
Không có dữ liệu chân cụ thể sẵn có cho MCP3423-E/MF.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
MCP3423-E/MF phù hợp cho 6 Áp dụngs: Industrial Process Measurement, Bridge-Based Pressure Sensing, Environmental Sensor Acquisition, 4-20 mA Loop Interface, Precision Laboratory Instrumentation, Low-Level Voltage Monitoring.
Industrial Process Measurement
The MCP3423-E/MF fits slow industrial process measurements where 18-bit resolution and differential input handling are more valuable than rapid sampling. Its two differential channels can acquire low-level sensor voltages while rejecting common-mode disturbances present on long wiring runs. The integrated 2.048 V reference provides a stable conversion scale, and the 4-sps maximum rate suits temperature, pressure, level, and current-loop measurements. The practical trade-off is latency: applications needing waveform or transient capture will require a faster converter because the MCP3423-E/MF is optimized for low-frequency precision rather than bandwidth.
Được đề xuất
Bridge-Based Pressure Sensing
The MCP3423-E/MF is suitable for bridge-based pressure or force sensing when the transducer produces a small differential voltage. Two differential inputs allow paired bridge or ratiometric measurements, while 18-bit resolution preserves fine-scale changes in the differential signal. The converter's 2.048 V internal reference can support a compatible excitation and measurement scheme without a separate reference source. Because conversion is limited to 4 samples per second, the design is best for slowly varying pressure rather than dynamic vibration or impact. Exposed-pad layout and low-noise routing remain essential near the sensor interface.
Được đề xuất
Environmental Sensor Acquisition
The MCP3423-E/MF can digitize low-rate environmental sensor outputs such as temperature, humidity, gas concentration, soil potential, or light level when their signals require more resolution than a basic 12-bit interface provides. The two-channel architecture supports pairing related environmental quantities, and the differential inputs are useful when a sensor is referenced to a noisy or remote return line. Its 4-sps conversion rate naturally matches slow environmental changes, while the integrated 2.048 V reference and automatic calibration reduce startup complexity. Designers should still apply input filtering and verify common-mode range for each sensor.
Được đề xuất
4-20 mA Loop Interface
The MCP3423-E/MF is appropriate for precision acquisition from industrial current-loop sensors when the loop current has first been converted into a suitable voltage. The converter's 18-bit resolution can preserve small process-variable variations, and its differential input structure can support measurement across a floating or referenced current-shunt arrangement. The 4-sps rate is adequate for typical process-control updates, while the internal 2.048 V reference simplifies scaling. Its practical limitation is that it does not itself provide loop excitation or current-to-voltage conversion; those functions must be implemented separately and reviewed for common-mode limits.
Được đề xuất
Precision Laboratory Instrumentation
The MCP3423-E/MF supports laboratory instruments that measure slowly varying voltages with modest bandwidth requirements. Its 18-bit resolution, differential inputs, and 2.048 V internal reference are useful for reference-junction, thermocouple, strain-gauge, and calibration measurements when the selected front end operates within the input limits. The 10-DFN 3x3 mm package helps reduce instrument footprint, and the I2C interface allows direct connection to a measurement controller. Users should recognize that the 4-sps rate limits sampling frequency, while low-noise layout, shielding, and calibrated offset or gain correction determine real measurement quality.
Được đề xuất
Low-Level Voltage Monitoring
The MCP3423-E/MF can monitor low-level differential voltages in power-control, battery-analysis, or instrumentation systems where the difference between two rails is the useful measurement rather than either absolute voltage. At 18 bits, it offers substantially higher code density than a lower-resolution converter, potentially revealing small changes in balance, offset, or sensor excitation. The two input channels allow paired measurements, while the integrated reference and automatic calibration support repeatable operation. The design must remain within the differential and common-mode limits, and its 4-sps rate means it should be used for trends rather than high-speed protection loops.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MCP3423-E/MF — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này |
|---|---|
| Brand | Microchip Technology |
| Package | 10-DFN (3x3 mm) |
| Resolution | 18 bits |
| Input Channel Count | 2 channels |
| Input Type | Differential |
| Architecture | Delta-sigma |
| Internal Reference | 2.048 V |
| Differential Input Range | ±2.048 V |
| Conversion Rate | 4 samples per second |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Interface | I2C |
| Operating Temperature Range | -40 °C to +125 °C |
Bảo phân biệt quan trọng
- High resolution in a compact dual-channel converter (vsNo verified drop-in alternative MPN was available for direct comparison)
- Integrated precision reference (vsNo verified drop-in alternative MPN was available for direct comparison)
- Low-frequency precision with integrated calibration support (vsNo verified drop-in alternative MPN was available for direct comparison)
Ghi chú thiết kế
Route the two differential input channels as tightly coupled pairs and connect the 10-DFN exposed pad according to Microchip's package drawing and land-pattern guidance. Place input bypass and filtering components close to their associated pins to minimize parasitic pickup. Keep the converter away from switching-regulator power nodes, relay contacts, motor traces, and high-current ground returns because the 18-bit resolution can expose low-level noise that is negligible in lower-resolution measurements.
Use differential input routing, guard structures, or grounded shielding where sensor leads are long or enter the board through an unprotected connector. Verify common-mode voltage and differential input limits against the complete manufacturer datasheet before applying external bipolar signals. The internal 2.048 V reference and automatic calibration improve scale stability, but they do not remove errors caused by common-mode pickup, ground gradients, source impedance, or unsuitable external filtering.
Do not select the MCP3423-E/MF for high-bandwidth waveform acquisition because its maximum conversion rate is 4 samples per second. Also avoid assuming that the 18-bit nominal resolution provides usable accuracy without considering offset, gain, noise, calibration, and input-conditioning errors. Confirm the I2C address, acquisition timing, data format, and calibration behavior in the current datasheet before writing firmware, since those details were not present in the supplied search snippets.
Provide a stable supply within the verified 2.7 V to 5.5 V range and place bypass capacitance close to the device's supply and ground connections. Account for the exposed thermal pad when defining the copper return path, especially in compact 3x3 mm designs. A thermal estimate cannot be completed from the supplied data because verified power dissipation, package thermal resistance, and ambient conditions are absent; consult the complete Microchip package and thermal documentation before production release.
Thông tin tuân thủ
The supplied verified product snippets do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These attributes require confirmation from Microchip's current product page or material declaration.
