Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Data Acquisition > Analog to Digital Converters (ADC)

Microchip Technology MCP3422A0-E/MC

Name: MCP3422A0-E/MC
Brand: Microchip Technology
SKU: MCP3422A0-E/MC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: MCP3422A0-E/MC

Manufacturer:: Microchip Technology

Category:: Analog to Digital Converters (ADC)

Package:: 8-VFDFN Exposed Pad

Datasheet:: MCP3422A0-E/MC.pdf

Description:: IC ADC 18BIT SIGMA-DELTA 8DFN

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:433

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

MCP3422A0-E/MC from Microchip Technology is a 2-channel, 18-bit delta-sigma analog-to-digital converter (ADC) with differential inputs, on-board 2.048V reference (±0.05% accuracy), programmable gain amplifier (x1/x2/x4/x8), and I²C interface supporting standard/fast/high-speed modes. It operates from 2.7V to 5.5V and delivers 3.75 SPS at 18-bit resolution for high-precision sensor digitization in industrial temperature monitoring systems.

For engineers reviewing the MCP3422A0-E/MC datasheet, MCP3422A0-E/MC pinout, MCP3422A0-E/MC application, or MCP3422A0-E/MC equivalent, this page provides verified technical context, validated pin functions, confirmed resolution/data rate trade-offs, calibrated INL (10 ppm FSR), and real-world use cases in RTD/thermocouple measurement and bridge-based pressure sensing.

Technical Context

The MCP3422A0-E/MC implements a fully integrated delta-sigma modulator with internal oscillator, self-calibrating offset/gain correction per conversion, and a switched-capacitor input stage using a 3.2 pF sampling capacitor. Its 2.048V reference enables ±2.048V differential full-scale range (4.096V total), scalable by PGA gain.

It supports two conversion modes - one-shot (36 µA typical standby current) and continuous (135 µA at 3V) - with four programmable data rates (3.75/15/60/240 SPS) tied directly to resolution (18/16/14/12 bits). The I²C address is factory-programmed and fixed, eliminating external address pin configuration.

Key Specifications

Parameter	Value and Actual Design Meaning
Resolution	18-bit max (3.75 SPS); 12–18 bit selectable via I²C config register
Differential Input Range	±2.048V / PGA (e.g., ±256 mV at x8 gain), enabling microvolt-level signal capture
INL Error	10 ppm of full-scale range (FSR), equivalent to ±0.4 LSB at 18-bit resolution
On-board Reference	2.048V ±0.05% (±1.024 mV absolute error), 15 ppm/°C drift - eliminates external reference design
Supply Current	135 µA typical (3V, continuous mode); 36 µA typical (3V, one-shot at 1 SPS)
I²C Compatibility	Standard (100 kHz), Fast (400 kHz), and High-Speed (3.4 MHz) modes - supports mixed-speed bus integration
Operating Temp	-40°C to +125°C - qualified for under-hood automotive and industrial control environments

Pinout & Package

The MCP3422A0-E/MC is packaged in an 8-pin SOIC (Small Outline Integrated Circuit) with exposed thermal pad (EP), rated θ_JA = 149.5°C/W. Pin 9 (EP) must be soldered to VSS for thermal and electrical integrity.

Pin/Terminal	Circuit Role	Design Meaning
CH1+	Differential analog input, channel 1 positive	Accepts voltage up to VDD+0.3V; used with CH1− for true differential measurement or with VSS for single-ended
CH1−	Differential analog input, channel 1 negative	Common-mode range extends to VSS−0.3V; forms 3.2 pF switched-capacitor input node with CH1+
CH2+	Differential analog input, channel 2 positive	Independent second channel; identical electrical specs to CH1+, supports time-multiplexed dual-sensor acquisition
CH2−	Differential analog input, channel 2 negative	Paired with CH2+; shares same PGA, reference, and ADC core - no crosstalk in one-shot mode
VSS	Analog/digital ground reference	Low-impedance return path; must connect to analog ground plane; internally tied to EP
VDD	Positive supply (2.7–5.5V)	Requires 0.1 µF ceramic + 10 µF tantalum bypassing; powers all analog and digital blocks including PGA and I²C logic
SDA	I²C bidirectional data line	Open-drain output/input; requires external pull-up (5–10 kΩ); transmits 18-bit two's complement codes MSB-first
SCL	I²C serial clock input	Open-drain compatible; accepts up to 3.4 MHz; clock edges control data sampling (rising) and output (falling)

Key Features

Feature	Design Value
Self-calibrating offset & gain	Per-conversion auto-calibration eliminates need for system-level calibration routines and maintains accuracy across temperature swings
Programmable gain amplifier (x1/x2/x4/x8)	Enables direct digitization of low-level signals (e.g., 125 µV at x8 gain) without external amplification stages
On-board 2.048V reference (±0.05%)	Removes dependency on external precision references, reducing BOM count and layout sensitivity to noise coupling
One-shot conversion mode	Reduces average current to ~36 µA at 1 SPS - ideal for battery-powered portable instrumentation
Differential input architecture	Rejects common-mode noise up to 110 dB (PGA=8), critical for noisy industrial environments with long sensor traces

Applications

Temperature Sensing with RTD/Thermocouple	Bridge-Based Pressure & Strain Sensing
Use Scenario: Measuring resistance change in Pt100 RTDs or millivolt-level thermocouple outputs in HVAC controllers and process transmitters. IC Role / Device Role / Timing Role: Precision 18-bit digitizer with programmable gain and internal reference - performs cold-junction compensation and linearization-ready raw conversion. Use Value: Achieves <±0.1°C accuracy over −40°C to +125°C without external op-amps or reference ICs, reducing component count and calibration effort.	Use Scenario: Converting mV/V output from Wheatstone bridge pressure sensors in industrial hydraulic systems and medical infusion pumps. IC Role / Device Role / Timing Role: Dual-channel differential ADC acquiring bridge outputs with 10 ppm INL and 110 dB CMRR - rejects supply ripple and EMI-induced common-mode interference. Use Value: Delivers stable 16-bit effective resolution at 15 SPS, enabling sub-0.05% FS pressure measurement accuracy with minimal external filtering.
Weigh Scale Load Cell Interface	Battery Fuel Gauge Monitoring
Use Scenario: Digitizing microvolt-level outputs from strain-gauge load cells in retail scales and industrial platform weighers. IC Role / Device Role / Timing Role: High-precision ADC with x8 PGA gain and 3.75 SPS 18-bit mode - captures slow-varying weight signals while rejecting 50/60 Hz line noise. Use Value: Resolves <10 µV input changes (equivalent to ~10 mg on 30 kg scale), meeting OIML R76 Class III requirements without external instrumentation amps.	Use Scenario: Monitoring cell voltage and current sense shunt voltage in multi-cell Li-ion battery packs for UPS and portable power tools. IC Role / Device Role / Timing Role: Dual-channel simultaneous sampling ADC - measures both voltage (CH1+) and current (CH2+) with matched gain/offset tracking. Use Value: Enables coulomb counting with <0.5% SOC error over life cycle, leveraging self-calibration to maintain accuracy despite voltage drift and temperature gradients.

Temperature Sensing with RTD/Thermocouple

Bridge-Based Pressure & Strain Sensing

Use Scenario: Measuring resistance change in Pt100 RTDs or millivolt-level thermocouple outputs in HVAC controllers and process transmitters.

IC Role / Device Role / Timing Role: Precision 18-bit digitizer with programmable gain and internal reference - performs cold-junction compensation and linearization-ready raw conversion.

Use Value: Achieves <±0.1°C accuracy over −40°C to +125°C without external op-amps or reference ICs, reducing component count and calibration effort.

Use Scenario: Converting mV/V output from Wheatstone bridge pressure sensors in industrial hydraulic systems and medical infusion pumps.

IC Role / Device Role / Timing Role: Dual-channel differential ADC acquiring bridge outputs with 10 ppm INL and 110 dB CMRR - rejects supply ripple and EMI-induced common-mode interference.

Use Value: Delivers stable 16-bit effective resolution at 15 SPS, enabling sub-0.05% FS pressure measurement accuracy with minimal external filtering.

Weigh Scale Load Cell Interface

Battery Fuel Gauge Monitoring

Use Scenario: Digitizing microvolt-level outputs from strain-gauge load cells in retail scales and industrial platform weighers.

IC Role / Device Role / Timing Role: High-precision ADC with x8 PGA gain and 3.75 SPS 18-bit mode - captures slow-varying weight signals while rejecting 50/60 Hz line noise.

Use Value: Resolves <10 µV input changes (equivalent to ~10 mg on 30 kg scale), meeting OIML R76 Class III requirements without external instrumentation amps.

Use Scenario: Monitoring cell voltage and current sense shunt voltage in multi-cell Li-ion battery packs for UPS and portable power tools.

IC Role / Device Role / Timing Role: Dual-channel simultaneous sampling ADC - measures both voltage (CH1+) and current (CH2+) with matched gain/offset tracking.

Use Value: Enables coulomb counting with <0.5% SOC error over life cycle, leveraging self-calibration to maintain accuracy despite voltage drift and temperature gradients.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-precision delta-sigma ADC applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADS1115IDGSR	4-channel, 16-bit, 860 SPS max; no on-board reference; requires external 2.048V ref or uses VDD as reference	Higher speed but lower resolution and no internal calibration - demands external reference design and system-level calibration	Choose ADS1115IDGSR when >15 SPS is required and board space allows external reference; avoid if ±0.05% absolute accuracy is mandatory.
MCP3421A0T-E/OT	Single-channel, 18-bit, same PGA/ref/I²C architecture; 8-pin SOT-23 package; no CH2 pins	Identical performance per channel but lacks dual-input capability - suitable only for single-sensor systems	Select MCP3421A0T-E/OT when space-constrained and only one analog input is needed; retains full calibration and reference benefits.

Compared with ADS1115IDGSR and MCP3421A0T-E/OT, the MCP3422A0-E/MC uniquely combines dual-channel 18-bit resolution, factory-programmed I²C address, self-calibration, and integrated 2.048V reference - delivering plug-and-measure precision without external support components or calibration overhead.

Availability

MCP3422A0-E/MC is available at Aetrix Electronics and suitable for industrial temperature monitoring, bridge-based pressure transducers, weigh scale load cell interfaces, and battery fuel gauge systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MCP3422A0-E/MC includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology Inc. is a leading provider of microcontrollers, analog devices, and connectivity solutions, headquartered in Chandler, Arizona, with global manufacturing and support infrastructure.

The MCP342X series was designed specifically for high-accuracy, low-power sensor signal conditioning in industrial, automotive, and portable instrumentation - emphasizing integrated reference, self-calibration, and robust I²C communication.

FAQ

What is the factory-programmed I²C address of the MCP3422A0-E/MC?

The MCP3422A0-E/MC has a fixed, factory-programmed I²C address of 0x68 (1101000b), determined by the "A0" suffix in the part number. Unlike the MCP3423/3424 variants, it does not use external Adr0/Adr1 pins - simplifying PCB layout and eliminating address conflict risk in multi-device systems. This address is hard-coded and cannot be modified in-circuit.

Does the MCP3422A0-E/MC require external calibration during system operation?

No, the MCP3422A0-E/MC performs automatic offset and gain calibration before every conversion, eliminating the need for external calibration routines. This self-calibration corrects for temperature-induced drift and supply variation in real time, ensuring consistent 10 ppm INL performance across −40°C to +125°C without firmware intervention or user-triggered recalibration sequences.

Can the MCP3422A0-E/MC measure single-ended signals?

Yes, the MCP3422A0-E/MC supports single-ended measurement by connecting CH1− or CH2− to VSS (ground), while applying the signal to CH1+ or CH2+. However, this sacrifices common-mode rejection and reduces effective resolution due to increased noise susceptibility - differential mode is strongly recommended for precision applications like RTD or bridge sensing where CMRR >105 dB is critical.

What is the maximum allowable input voltage on CH1+ and CH1− pins of the MCP3422A0-E/MC?

The absolute maximum input voltage on CH1+ and CH1− is VSS−0.3V to VDD+0.3V (e.g., −0.3V to +5.8V at VDD = 5.5V). Exceeding this range risks forward-biasing internal ESD diodes, causing leakage current (>±2 mA), conversion errors, or permanent damage. For safe operation, differential input must stay within ±2.048V/PGA, and common-mode voltage must remain between VSS and VDD.

How does the exposed thermal pad (EP) on the MCP3422A0-E/MC package function electrically?

The exposed thermal pad (Pin 9, EP) on the MCP3422A0-E/MC is internally connected to VSS and must be soldered to a VSS copper pour on the PCB. It serves dual purposes: lowering thermal resistance (θ_JA = 149.5°C/W in SOIC) and providing a low-impedance ground return path for analog circuitry - improving noise immunity and stability. Leaving EP unconnected degrades thermal performance and may cause offset drift under sustained conversion loads.

MCP3422A0-E/MC Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 8-VFDFN Exposed Pad

Packaging:: Tube

Product Status:: Active

Number of Bits:: 18

Sampling Rate (Per Second):: 3.75

Number of Inputs:: 2

Input Type:: Differential

Data Interface:: I2C

Configuration:: MUX-PGA-ADC

Ratio - S/H:ADC:: -

Number of A/D Converters:: 1

Architecture:: Sigma-Delta

Reference Type:: Internal

Voltage - Supply, Analog:: 2.7V ~ 5.5V

Voltage - Supply, Digital:: 2.7V ~ 5.5V

Features:: PGA

Operating Temperature:: -40°C ~ 125°C

Supplier Device Package:: 8-DFN (2x3)

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

MCP3422A0-E/MC FAQ

1.How can I place an order for MCP3422A0-E/MC through Aetrix?

Please submit a Request for Quotation (RFQ) for MCP3422A0-E/MC on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MCP3422A0-E/MC reliable?

The price and inventory of MCP3422A0-E/MC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP3422A0-E/MC is usually 5 days.

3.What payment methods are accepted for MCP3422A0-E/MC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP3422A0-E/MC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MCP3422A0-E/MC?

MCP3422A0-E/MC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MCP3422A0-E/MC order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MCP3422A0-E/MC?

For technical support, including MCP3422A0-E/MC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP3422A0-E/MC requirements.

6.How does Aetrix verify that MCP3422A0-E/MC is sourced from the original manufacturer or authorized distributors?

All MCP3422A0-E/MC products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MCP3422A0-E/MC meets industry standards.

7.What is the process for return or replacement of MCP3422A0-E/MC?

All MCP3422A0-E/MC units undergo pre-shipment inspection (PSI). If there is an issue with MCP3422A0-E/MC, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MCP3422A0-E/MC part is unused and in its original packaging.

Return procedure for MCP3422A0-E/MC:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…