My Inquiry
My Account
Microchip Technology MCP3426A5T-E/SN
- Part No.:
- MCP3426A5T-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MCP3426A5T-E/SN.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,692
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MCP3426A5T-E/SN from Microchip Technology is a 16-bit ΔΣ analog-to-digital converter with two differential input channels, on-board 2.048V ±0.05% voltage reference, programmable gain amplifier (x1/x2/x4/x8), and I²C interface supporting standard/fast/high-speed modes. It delivers 15 SPS at 16-bit resolution, 10 ppm INL, and operates from 2.7V to 5.5V supply in industrial temperature range (–40°C to +125°C), enabling high-accuracy sensor signal digitization in portable instrumentation and factory automation.
For engineers reviewing the MCP3426A5T-E/SN datasheet, MCP3426A5T-E/SN pinout, MCP3426A5T-E/SN application, or MCP3426A5T-E/SN equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative parts with documented differences, and supply-chain support details specific to this SOIC-8 variant.
Technical Context
The MCP3426A5T-E/SN implements a delta-sigma modulation architecture with integrated self-calibration for offset and gain per conversion, eliminating need for external calibration across temperature and supply variations. Its switched-capacitor front-end uses a 3.2 pF sampling capacitor and supports differential or single-ended inputs on CH1+/CH1– and CH2+/CH2–.
Conversion is controlled via I²C-configurable bits selecting resolution (12/14/16-bit), PGA gain (1–8), channel (CH1 or CH2), and mode (one-shot or continuous). The on-board oscillator enables autonomous timing without external clock source, and the 2.048V reference sets full-scale differential input range to ±2.048V/PGA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution & Data Rate | 16-bit @ 15 SPS, 14-bit @ 60 SPS, 12-bit @ 240 SPS - defines trade-off between noise floor and update rate for low-frequency sensor signals |
| Differential Input Range | ±2.048V / PGA - determines maximum measurable voltage swing before saturation (e.g., ±256 mV at PGA=8) |
| INL Error | 10 ppm of full scale - ensures ≤±0.001% linearity error over full range, critical for precision weigh scales and RTD measurement |
| On-board Reference | 2.048V ±0.05% (15 ppm/°C drift) - eliminates external reference component and layout complexity while maintaining system accuracy |
| Supply Current | 135 µA typical (3V, continuous); 9 µA typical (3V, one-shot 16-bit) - enables battery-powered operation with >1-year runtime in intermittent sensing |
| I²C Interface | Standard (100 kHz), Fast (400 kHz), High-Speed (3.4 MHz) - supports flexible host controller integration without protocol translation |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive, industrial PLC, and harsh-environment embedded systems |
Pinout & Package
Package: 8-pin SOIC (Small Outline Integrated Circuit), body width 3.9 mm, lead pitch 1.27 mm, RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: CH1+ | Differential analog input positive, Channel 1 | Accepts high-impedance sensor signals (e.g., thermocouple hot junction); must be paired with CH1– for true differential measurement |
| 2: CH1– | Differential analog input negative, Channel 1 | Completes differential pair with CH1+; can be tied to VSS for single-ended mode, reducing common-mode rejection |
| 3: CH2+ | Differential analog input positive, Channel 2 | Enables dual-sensor monitoring (e.g., temperature + pressure) without multiplexer switching latency or crosstalk |
| 4: CH2– | Differential analog input negative, Channel 2 | Provides second independent differential path; shares same PGA and ADC core as CH1, not simultaneous sampling |
| 5: VSS | Analog/digital ground reference | Must connect to low-impedance analog ground plane; internal EP pad ties to VSS - thermal and electrical grounding required |
| 6: VDD | Positive supply (2.7–5.5V) | Requires local 0.1 µF ceramic + 10 µF tantalum decoupling; power-on-reset triggers at ~2.2V with 200 mV hysteresis |
| 7: SDA | I²C bidirectional data line | Open-drain output; requires external pull-up (5–10 kΩ for standard/fast mode); transmits 16/14/12-bit codes and status bits |
| 8: SCL | I²C serial clock input | Open-drain compatible; accepts up to 3.4 MHz clock; rising edge latches input, falling edge drives output |
Key Features
| Feature | Design Value |
|---|---|
| Self-calibrating offset & gain | Eliminates need for periodic system-level recalibration; maintains <±30 µV offset and <0.1% gain error across –40°C to +125°C |
| Programmable gain amplifier (x1–x8) | Extends effective dynamic range: enables 16-bit resolution on sub-256 mV signals (e.g., microvolt-level thermocouple outputs) |
| On-board 2.048V reference | Removes external reference IC and associated PCB area, BOM cost, and thermal drift mismatch in multi-channel systems |
| One-shot conversion mode | Reduces average current to <1 µA during idle - essential for energy harvesting and coin-cell-powered IoT endpoints |
| Differential input architecture | Rejects common-mode noise up to 110 dB (at PGA=8), improving immunity to EMI in motor drives and factory-floor environments |
Applications
| Temperature Sensing | Bridge-Based Sensing |
|---|---|
Use Scenario: Measuring resistance of Pt100 RTD in HVAC control panel using 4-wire configuration. IC Role / Device Role / Timing Role: MCP3426A5T-E/SN digitizes differential voltage across RTD with 16-bit resolution and auto-calibration, rejecting lead-wire noise. Use Value: Achieves ±0.1°C accuracy over –40°C to +125°C without external reference or calibration firmware. |
Use Scenario: Reading output of 350 Ω strain gauge in load cell for industrial weighing system. IC Role / Device Role / Timing Role: MCP3426A5T-E/SN configures PGA=8 to resolve µV-level bridge imbalance, sampling at 15 SPS for stable weight display. Use Value: Delivers 10 ppm INL and 2.5 µVRMS noise - sufficient for 1:10,000 weight resolution (0.1 g @ 1 kg full scale). |
| Battery Fuel Gauging | Portable Instrumentation |
Use Scenario: Monitoring Li-ion battery cell voltage and current-sense shunt in handheld medical device. IC Role / Device Role / Timing Role: MCP3426A5T-E/SN alternates between CH1 (cell voltage) and CH2 (shunt voltage) in one-shot mode, minimizing power draw. Use Value: 9 µA typical current at 16-bit one-shot enables >2-year battery life on CR2032 while maintaining ±1 mV voltage accuracy. |
Use Scenario: Digitizing thermistor and ambient light sensor outputs in battery-powered environmental logger. IC Role / Device Role / Timing Role: MCP3426A5T-E/SN uses CH1 for NTC thermistor (PGA=4) and CH2 for photodiode (PGA=1), both in continuous 60 SPS mode. Use Value: Single-chip dual-channel acquisition reduces PCB size by 40% vs. discrete ADCs, with guaranteed –40°C to +125°C operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1115IDGSR | 4-channel, no on-board reference (requires external 2.048V), higher 16-bit noise (5.5 µVRMS), fixed 128SPS max | Needs external reference and filtering; better suited for multi-sensor data loggers where channel count >2 | Select if 4-channel simultaneous sampling required and board space allows external reference |
| MCP3421A0T-E/OT | Single-channel, same PGA/ref/I²C features, SOT-23-6 package, lower max temp (+85°C) | Limited to one sensor; smaller footprint but no thermal pad - unsuitable for high-reliability industrial use | Select only for cost-sensitive, single-sensor consumer devices operating below 85°C |
Compared with ADS1115IDGSR and MCP3421A0T-E/OT, the MCP3426A5T-E/SN uniquely combines factory-programmed I²C address, integrated reference, thermal-pad-enabled SOIC-8 packaging, and full –40°C to +125°C qualification - making it the only option for ruggedized dual-sensor industrial nodes requiring zero external reference components.
Availability
MCP3426A5T-E/SN is available at Aetrix Electronics and suitable for portable instrumentation, factory automation equipment, and battery fuel gauging requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for MCP3426A5T-E/SN 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 components, and Flash-IP solutions, serving industrial, automotive, and consumer markets with high-reliability silicon and development tools.
The MCP342X series was designed specifically for high-accuracy, low-power sensor signal conditioning in space-constrained embedded systems - emphasizing integrated references, self-calibration, and robust I²C interfacing without external support components.
FAQ
What is the factory-programmed I²C address of the MCP3426A5T-E/SN?
The MCP3426A5T-E/SN has its I²C address permanently programmed at the factory and cannot be changed via external pins. Its default 7-bit address is 0x68 (1101000b) when A0 = low, matching the "A5" suffix designation in Microchip's naming convention. This eliminates address conflicts in multi-device I²C buses and removes need for external address-select resistors - simplifying layout and ensuring deterministic communication from power-up.
Does the MCP3426A5T-E/SN support true simultaneous sampling across both channels?
No, the MCP3426A5T-E/SN does not support simultaneous sampling. It uses a single ΔΣ modulator shared between CH1 and CH2, with channel selection performed via internal multiplexer under I²C command. Conversions occur sequentially - e.g., reading CH1 then CH2 introduces inter-channel timing skew. For applications requiring phase-aligned measurements (e.g., motor current/voltage), external synchronization or a dual-core ADC like the MCP3428 is required. The MCP3426A5T-E/SN is optimized for cost-sensitive dual-sensor monitoring where timing correlation is non-critical.
How does the exposed thermal pad (EP) on the MCP3426A5T-E/SN SOIC package function electrically?
The exposed thermal pad (EP) on the MCP3426A5T-E/SN is internally connected to VSS and must be soldered to a dedicated VSS copper pour on the PCB. It serves dual purposes: (1) lowering thermal resistance (θJA = 149.5°C/W) to improve long-term reliability at +125°C ambient, and (2) providing a low-inductance ground return path for analog circuitry. Leaving the EP unconnected degrades thermal performance by >30% and increases susceptibility to ground bounce during conversion cycles - directly impacting INL and noise specifications.
Can the MCP3426A5T-E/SN measure single-ended signals, and what is the impact on performance?
Yes, the MCP3426A5T-E/SN supports single-ended operation by tying CHn– to VSS (e.g., CH1– → VSS, CH1+ → signal). However, this reduces common-mode rejection ratio from 110 dB (differential, PGA=8) to <60 dB, increasing susceptibility to power supply noise and EMI. Input impedance drops to ~25 MΩ (vs. 2.25 MΩ/PGA differential), and full-scale range becomes 0–2.048V/PGA instead of ±2.048V/PGA. Use single-ended mode only when signal sources are inherently referenced to VSS and noise environment is benign - otherwise, differential wiring is strongly recommended.
What is the minimum recommended pull-up resistor value for SDA/SCL when operating the MCP3426A5T-E/SN in high-speed I²C mode (3.4 MHz)?
For reliable high-speed I²C operation at 3.4 MHz, Microchip specifies a maximum bus capacitance of 400 pF and recommends pull-up resistors ≤1 kΩ on both SDA and SCL lines. With typical PCB trace capacitance (~10–15 pF/inch) and device pin capacitance (4 pF), a 680 Ω pull-up to VDD ensures rise time <250 ns and meets I²C HS-mode timing requirements. Using >1 kΩ resistors causes marginal timing margins and may result in ACK/NACK failures or data corruption - especially in multi-node buses or noisy industrial environments.
MCP3426A5T-E/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 15
- 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-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MCP3426A5T-E/SN FAQ
1.How can I place an order for MCP3426A5T-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP3426A5T-E/SN 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 MCP3426A5T-E/SN reliable?
The price and inventory of MCP3426A5T-E/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP3426A5T-E/SN is usually 5 days.
3.What payment methods are accepted for MCP3426A5T-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP3426A5T-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP3426A5T-E/SN?
MCP3426A5T-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP3426A5T-E/SN 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 MCP3426A5T-E/SN?
For technical support, including MCP3426A5T-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP3426A5T-E/SN requirements.
6.How does Aetrix verify that MCP3426A5T-E/SN is sourced from the original manufacturer or authorized distributors?
All MCP3426A5T-E/SN 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 MCP3426A5T-E/SN meets industry standards.
7.What is the process for return or replacement of MCP3426A5T-E/SN?
All MCP3426A5T-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with MCP3426A5T-E/SN, 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 MCP3426A5T-E/SN part is unused and in its original packaging.
Return procedure for MCP3426A5T-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCP3426A5T-E/SN Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
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.
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.
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…
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…
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…
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 …
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…
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…
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…
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…
