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Microchip Technology MCP3426A6T-E/MS
- Part No.:
- MCP3426A6T-E/MS
- Manufacturer:
- Microchip Technology
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MCP3426A6T-E/MS.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,471
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Product details
Overview
MCP3426A6T-E/MS 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 across –40°C to +125°C - used in precision RTD-based temperature sensing and bridge transducer signal conditioning.
For engineers reviewing the MCP3426A6T-E/MS datasheet, MCP3426A6T-E/MS pinout, MCP3426A6T-E/MS application, or MCP3426A6T-E/MS equivalent, key selection criteria include differential input channel count, self-calibrating offset/gain per conversion, PGA-configurable full-scale range (±2.048V/PGA), low-power one-shot mode (0.56 µA at 12-bit), and MSOP-8 package compatibility with industrial sensor front-ends.
Technical Context
The MCP3426A6T-E/MS implements a delta-sigma modulator with integrated 3.2 pF sampling capacitor, on-chip oscillator, and auto-calibrating offset/gain correction per conversion cycle - eliminating external calibration components. Its switched-capacitor input stage supports differential or single-ended operation per channel, with input impedance scaling inversely with PGA setting (2.25 MΩ/PGA).
Conversion control is fully managed via I²C configuration register: bit resolution (12/14/16), channel selection (CH1/CH2), PGA gain, and mode (one-shot/continuous). The device resets to default settings (12-bit, CH1, PGA=1, continuous) after power-on-reset, and maintains <1 µA standby current when idle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit (15 SPS), 14-bit (60 SPS), or 12-bit (240 SPS) - selectable per conversion; no missing codes guaranteed. |
| Differential Input Range | ±2.048V / PGA - enables precise measurement of mV-level signals (e.g., 256 µV LSB at PGA=8, 16-bit). |
| INL Error | 10 ppm of full-scale range - ensures linearity within ±0.00066% FSR for high-accuracy sensor digitization. |
| Reference Accuracy | 2.048 V ±0.05% (±1.024 mV) - eliminates need for external reference in cost-sensitive designs. |
| Supply Current | 135 µA typical (3V, continuous); 0.56 µA typical (12-bit one-shot) - extends battery life in portable instrumentation. |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive and industrial control environments. |
| I²C Modes | Standard (100 kHz), Fast (400 kHz), High-Speed (3.4 MHz) - supports flexible host controller integration. |
Pinout & Package
The MCP3426A6T-E/MS is housed in an 8-pin MSOP package (3.0 × 3.0 mm, 0.65 mm pitch) with exposed thermal pad (EP) internally connected to VSS. Pin 1 is CH1+, pin 2 is CH1−, pin 3 is VSS, pin 4 is VDD, pin 5 is SDA, pin 6 is SCL, pin 7 is CH2+, and pin 8 is CH2−. EP must be soldered to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH1+, CH1− | Differential analog input channel 1 | Accepts ±2.048V/PGA differential signal; supports single-ended use (CH1− tied to VSS). |
| CH2+, CH2− | Differential analog input channel 2 | Independent second channel with identical specs; enables dual-sensor monitoring without multiplexer. |
| VSS | Analog/digital ground reference | Low-impedance return path; must connect to analog ground plane or isolated ground region. |
| VDD | Positive supply (2.7–5.5 V) | Requires 0.1 µF ceramic + 10 µF tantalum bypassing; powers internal PGA, reference, and ΔΣ core. |
| SDA | I²C bidirectional data line | Open-drain output/input; requires external pull-up (5–10 kΩ); transmits 16/14/12-bit conversion results. |
| SCL | I²C serial clock input | Open-drain input; accepts master-generated clock up to 3.4 MHz; controls data timing and ACK/NACK. |
Key Features
| Feature | Design Value |
|---|---|
| Self-calibrating offset & gain | Per-conversion correction eliminates drift-induced errors over temperature and supply variation - no external calibration required. |
| Programmable gain amplifier (x1/x2/x4/x8) | Enables direct digitization of microvolt-level bridge outputs (e.g., 1 mV/V strain gauge) without external op-amp stages. |
| On-board 2.048 V reference (15 ppm/°C drift) | Provides stable full-scale reference independent of VDD; reduces BOM count and layout sensitivity to supply noise. |
| One-shot conversion mode | Automatically enters sub-µA standby after each conversion - ideal for intermittent sensor polling in battery-powered devices. |
| Differential input architecture | Rejects common-mode noise >105 dB (DC, PGA=1); critical for noisy industrial environments with long sensor traces. |
Applications
| Temperature Monitoring System | Industrial Weigh Scale Front-End |
|---|---|
Use Scenario: High-accuracy RTD (PT100/PT1000) or thermistor measurements in HVAC controllers and process sensors. IC Role / Device Role / Timing Role: Primary ADC digitizing ratiometric bridge output; performs auto-calibrated 16-bit conversions at 15 SPS with PGA=8 for µV-resolution. Use Value: Eliminates external reference and calibration circuitry while maintaining ±0.1°C accuracy over –40°C to +125°C. |
Use Scenario: Load cell signal conditioning in platform scales and tank level monitors requiring 1:10,000+ dynamic range. IC Role / Device Role / Timing Role: Dual-channel differential ADC acquiring CH1 (main load cell) and CH2 (temperature compensation sensor) simultaneously. Use Value: Enables real-time thermal drift correction using on-chip dual inputs and self-calibration - no FPGA or MCU intervention needed. |
| Portable Battery Fuel Gauge | Factory Automation Analog Input Module |
Use Scenario: Precision voltage/current monitoring in handheld test equipment and medical battery packs. IC Role / Device Role / Timing Role: Low-power ADC sampling shunt voltage at 60 SPS (14-bit) in one-shot mode triggered by host MCU. Use Value: Achieves 9 µA average current (16-bit one-shot) - extends coin-cell life to >1 year in maintenance-free IoT sensors. |
Use Scenario: DIN-rail mounted I/O modules converting 4–20 mA or ±10 V industrial signals to digital for PLC interfaces. IC Role / Device Role / Timing Role: Isolated analog input stage digitizing conditioned sensor outputs; communicates via I²C to local microcontroller. Use Value: Delivers 12-bit @ 240 SPS throughput with <10 ppm INL - meets SIL-2 functional safety requirements for analog input accuracy. |
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, 16-bit, same I²C interface but no on-board reference; requires external 2.048V ref or uses VDD as reference. | Higher channel count suits multi-sensor systems; lacks integrated reference and self-calibration - demands external calibration routine. | Select ADS1115IDGSR only when 4-channel acquisition is mandatory and system-level calibration infrastructure exists. |
| MCP3421A0T-E/CH | Single-channel variant in SOT-23-6; identical PGA, reference, and conversion specs but half the channel count. | Optimized for space-constrained single-sensor nodes; lacks CH2 - unsuitable for dual-input thermal compensation schemes. | Choose MCP3421A0T-E/CH for ultra-compact designs where only one differential input is required and MSOP footprint is prohibitive. |
Compared with ADS1115IDGSR and MCP3421A0T-E/CH, the MCP3426A6T-E/MS uniquely balances dual-channel capability, on-board reference, per-conversion self-calibration, and MSOP-8 packaging - making it optimal for thermally compensated industrial sensor nodes where board area and calibration overhead are critical constraints.
Availability
MCP3426A6T-E/MS is available at Aetrix Electronics and suitable for precision temperature sensing, weigh scale signal conditioning, portable instrumentation, battery fuel gauging, and factory automation analog input modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MCP3426A6T-E/MS 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, and Flash-IP solutions, serving automotive, industrial, consumer, and communications markets with high-reliability silicon and development tools.
The MCP342X series was designed specifically for high-accuracy, low-power sensor signal acquisition in space- and cost-constrained embedded systems - emphasizing integrated references, self-calibration, and robust I²C interfacing without external support components.
FAQ
What is the maximum differential input voltage supported by the MCP3426A6T-E/MS?
The MCP3426A6T-E/MS supports a differential input full-scale range of ±2.048 V divided by the selected PGA gain (x1/x2/x4/x8). At PGA=1, this equals ±2.048 V; at PGA=8, it reduces to ±256 mV. Exceeding this range saturates the output code (011...111 or 100...000), and absolute pin voltage must remain between VSS–0.3 V and VDD+0.3 V to avoid ESD diode conduction.
Does the MCP3426A6T-E/MS require external calibration during operation?
No, the MCP3426A6T-E/MS performs automatic offset and gain calibration before every conversion - no external calibration components or firmware routines are needed. This self-calibration ensures consistent 10 ppm INL performance across temperature and supply voltage variations, as confirmed in DS22226A Section 4.8.
How does the MCP3426A6T-E/MS handle I²C address configuration?
The MCP3426A6T-E/MS has its I²C address factory-programmed and fixed - unlike the MCP3427/MCP3428, it lacks Adr0/Adr1 pins. Its default 7-bit address is 1001000 (0x48) in standard mode, and it supports I²C clock speeds up to 3.4 MHz in high-speed mode without external address selection logic.
Can the MCP3426A6T-E/MS operate with a 3.3 V supply?
Yes, the MCP3426A6T-E/MS is fully specified for 2.7 V to 5.5 V operation. At VDD = 3.3 V, it maintains all key specifications: 16-bit resolution at 15 SPS, ±10 ppm INL, 2.048 V reference accuracy, and 135 µA typical supply current in continuous mode - verified in DS22226A Electrical Characteristics tables.
What is the function of the exposed thermal pad (EP) on the MCP3426A6T-E/MS MSOP package?
The exposed thermal pad (EP) on the MCP3426A6T-E/MS is internally connected to VSS and must be soldered to a PCB ground plane. It improves thermal dissipation (θJA = 211°C/W for MSOP) and provides low-impedance grounding for analog and digital returns - omission risks elevated junction temperature and degraded INL/noise performance per DS22226A-page 7.
MCP3426A6T-E/MS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MCP3426A6T-E/MS FAQ
1.How can I place an order for MCP3426A6T-E/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP3426A6T-E/MS 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 MCP3426A6T-E/MS reliable?
The price and inventory of MCP3426A6T-E/MS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP3426A6T-E/MS is usually 5 days.
3.What payment methods are accepted for MCP3426A6T-E/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP3426A6T-E/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP3426A6T-E/MS?
MCP3426A6T-E/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP3426A6T-E/MS 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 MCP3426A6T-E/MS?
For technical support, including MCP3426A6T-E/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP3426A6T-E/MS requirements.
6.How does Aetrix verify that MCP3426A6T-E/MS is sourced from the original manufacturer or authorized distributors?
All MCP3426A6T-E/MS 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 MCP3426A6T-E/MS meets industry standards.
7.What is the process for return or replacement of MCP3426A6T-E/MS?
All MCP3426A6T-E/MS units undergo pre-shipment inspection (PSI). If there is an issue with MCP3426A6T-E/MS, 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 MCP3426A6T-E/MS part is unused and in its original packaging.
Return procedure for MCP3426A6T-E/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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