MCP3423T-E/UN - 18-Bit Dual-Channel Delta-Sigma ADC | Microchip Technology
MPN: MCP3423T-E/UN ✓ نشطMCP3423T-E/UN نظرة عامة
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.
بدائل مباشرة لـ MCP3423T-E/UN — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع MCP3423T-E/UN (نفس عامل الشكل والبصمة) — يختلف في Digital Interface, Number of Input Channels.
MCP3423-E/UN
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←MCP3423T-E/UN الحدود القصوى والخصائص الكهربائية
| الدقة | 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 |
| جهد التغذية | 3.3 V to 5 V |
| Digital Interface | I²C-compatible, 2-wire serial |
| Input Type | Differential |
| Automatic Calibration | Yes |
| Power-On Reset | Yes |
| نطاق درجة حرارة التشغيل | -40°C to +125°C |
| العلبة | 10-MSOP |
| نوع التركيب | Surface mount |
| Packaging | Tape and reel |
| معدل أخذ العينات | 3.75 SPS to 240 SPS |
| Data Interface | I²C, serial |
| حالة 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 |
دليل تكوين أطراف MCP3423T-E/UN 10-msop
تكوين الأطراف لـ MCP3423T-E/UN (حزمة 10-msop). يتميز هذا المكوّن التناظري بأطراف الإدخال والإخراج وإمداد الطاقة. راجع ورقة بيانات الشركة المصنعة لتكوينات طرف إلغاء الإزاحة والتعويض والتمكين. مثالي لدوائر تكييف الإشارة والمضخمات.
لا تتوفر بيانات مفصلة لمخطط التوصيلات لـ MCP3423T-E/UN.
راجع ورقة البيانات للحصول على تكوين الأطراف الكامل.
التطبيقات النموذجية
MCP3423T-E/UN مناسب لـ 6 التطبيقs: 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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
بيانات مرجعية هندسية لـ MCP3423T-E/UN — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | 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 |
أبرز الفروقات
- Two differential inputs in a compact 10-MSOP footprint (مقابلMCP3424T-E/ST)
- Onboard precision reference simplifies the analog system (مقابلMCP3426A7T-E/MS)
- Direct same-family ordering alternative (مقابلMCP3423-E/UN)
ملاحظات التصميم
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.
معلومات الامتثال
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.
