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Microchip Technology MCP3426A1T-E/MC
- Part No.:
- MCP3426A1T-E/MC
- Manufacturer:
- Microchip Technology
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-VFDFN Exposed Pad
- Datasheet:
-
MCP3426A1T-E/MC.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,345
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Product details
Overview
MCP3426A1T-E/MC from Microchip Technology Inc. is a 16-bit delta-sigma analog-to-digital converter (ADC) with two differential input channels, 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 delivers 15 SPS at 16-bit resolution, ±10 ppm INL, and operates from 2.7V to 5.5V for precision sensor signal acquisition in industrial monitoring systems.
For engineers reviewing the MCP3426A1T-E/MC datasheet, MCP3426A1T-E/MC pinout, MCP3426A1T-E/MC application, or MCP3426A1T-E/MC equivalent, key selection criteria include differential channel count, self-calibrating offset/gain per conversion, PGA-configurable input range, low-power one-shot mode (0.56 µA in 12-bit mode), and SOIC/MSOP/DFN package compatibility with thermal pad grounding requirements.
Technical Context
The MCP3426A1T-E/MC implements a switched-capacitor delta-sigma modulator with integrated oscillator, enabling auto-calibration of offset and gain before each conversion-ensuring stability across temperature (-40°C to +125°C) and supply voltage (2.7V–5.5V) variations. Its 3.2 pF sampling capacitor and PGA front-end define differential input impedance (2.25 MΩ/PGA) and support single-ended or differential input configurations.
Conversion control is fully managed via I²C: configuration register bits select resolution (12/14/16-bit), channel (CH1/CH2), PGA gain, and mode (one-shot/continuous). The device outputs two's complement codes with MSB-first transmission, and saturates at 011...111 (positive full scale) or 100...000 (negative full scale) when input exceeds ±2.048V/PGA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit (15 SPS), 14-bit (60 SPS), or 12-bit (240 SPS); determines effective number of bits and noise floor in final system measurement. |
| Differential Input Range | ±2.048V / PGA; defines maximum measurable voltage difference across CHn+/CHn− before saturation. |
| INL Error | 10 ppm of full-scale range (FSR); limits absolute accuracy deviation across entire input span at 16-bit mode. |
| On-board Reference | 2.048V ±0.05% (15 ppm/°C drift); eliminates need for external precision reference and reduces BOM cost and layout area. |
| Supply Current | 135 µA typical (3V, continuous); 0.56 µA typical (12-bit one-shot); enables battery-powered portable instrumentation. |
| I²C Interface Speed | Standard (100 kHz), Fast (400 kHz), High-Speed (3.4 MHz); supports flexible host controller timing and noise immunity trade-offs. |
| Operating Temperature | -40°C to +125°C; qualified for under-hood automotive, factory automation, and harsh industrial environments. |
Pinout & Package
The MCP3426A1T-E/MC is available in 8-pin SOIC, MSOP, and 2×3 DFN packages with exposed thermal pad (EP), all requiring EP connection to VSS for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH1+, CH1− | Differential analog input channel 1 | Accepts ±2.048V/PGA differential signal; CH1− may be tied to VSS for single-ended use. |
| CH2+, CH2− | Differential analog input channel 2 | Independent second channel with identical full-scale and impedance characteristics as CH1. |
| VDD, VSS | Power supply and ground | VDD requires 0.1 µF ceramic + 10 µF tantalum bypass; VSS must connect to low-impedance analog ground plane. |
| SDA, SCL | I²C bidirectional data and clock | Open-drain pins requiring external pull-up resistors (5–10 kΩ for standard/fast mode). |
| EP | Exposed thermal pad | Internally connected to VSS; must be soldered to PCB copper pour for thermal dissipation and noise reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Self-calibrating offset and gain | Per-conversion calibration eliminates need for external trimming and maintains accuracy over temperature and supply drift. |
| Programmable gain amplifier (x1/x2/x4/x8) | Enables high-resolution digitization of microvolt-level signals (e.g., thermocouple outputs) without external amplification. |
| On-board 2.048V reference (±0.05%) | Removes dependency on external reference ICs, reducing component count, board space, and long-term drift uncertainty. |
| One-shot conversion mode | Reduces average current to sub-microamp levels during idle periods-critical for energy harvesting and battery longevity. |
| Differential input architecture | Rejects common-mode noise up to 110 dB (PGA=8), improving measurement fidelity in electrically noisy industrial settings. |
Applications
| Temperature Sensing | Bridge-Based Transducers |
|---|---|
Use Scenario: Measuring RTD resistance changes in HVAC control panels using 4-wire configuration. IC Role / Device Role / Timing Role: MCP3426A1T-E/MC performs ratiometric 16-bit digitization of bridge output with PGA gain x8 to resolve <1 mΩ resistance shifts. Use Value: Achieves ±0.1°C accuracy over -40°C to +125°C without external calibration, enabled by on-board reference and self-calibration. |
Use Scenario: Reading strain gauge outputs in structural health monitoring sensors deployed on bridges. IC Role / Device Role / Timing Role: MCP3426A1T-E/MC acquires differential millivolt-level signals from full-bridge transducers at 60 SPS (14-bit) with 105 dB CMRR. Use Value: Delivers stable 14-bit linearity despite ambient temperature swings, eliminating need for external zero/gain compensation circuitry. |
| Weigh Scales | Battery Fuel Gauging |
Use Scenario: Precision load cell readout in commercial kitchen scales with 1 g resolution. IC Role / Device Role / Timing Role: MCP3426A1T-E/MC digitizes dual-channel bridge outputs (CH1 for primary load, CH2 for tare compensation) at 15 SPS. Use Value: Enables true 16-bit effective resolution with <10 ppm INL, meeting OIML R76 Class III metrology requirements. |
Use Scenario: Monitoring cell voltage and current sense shunt in lithium-ion battery packs for UPS systems. IC Role / Device Role / Timing Role: MCP3426A1T-E/MC measures shunt voltage (CH1) and cell voltage (CH2) simultaneously with programmable gain and one-shot triggering. Use Value: Reduces quiescent current to 0.56 µA in 12-bit mode during standby-extending battery runtime between active measurements. |
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, internal reference ±0.15%, no self-calibration, fixed 2.048V ref | Higher channel count but lacks per-conversion offset/gain calibration; requires external trimming for long-term stability | Select ADS1115IDGSR only if 4-channel density outweighs need for autonomous calibration in field-deployed systems. |
| MCP3421A0T-E/MS | Single-channel, same family, identical reference/PGA/calibration architecture, MSOP-8 | Reduced channel count limits multi-sensor applications; otherwise pin-compatible and firmware-compatible | Choose MCP3421A0T-E/MS where space-constrained designs require single-channel operation without sacrificing calibration fidelity. |
Compared with ADS1115IDGSR and MCP3421A0T-E/MS, the MCP3426A1T-E/MC uniquely balances dual-channel capability, factory-programmed I²C address, and per-conversion self-calibration-making it optimal for compact, maintenance-free industrial sensor nodes requiring guaranteed accuracy over lifetime.
Availability
MCP3426A1T-E/MC is available at Aetrix Electronics and suitable for industrial automation equipment, portable instrumentation, and battery-powered sensor nodes requiring stable component supply, extended temperature operation, and long-term metrological consistency.
Supply support for MCP3426A1T-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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and interface ICs for industrial, automotive, and consumer applications.
The MCP342X series-including MCP3426A1T-E/MC-is designed specifically for high-accuracy, low-power sensor signal conditioning in space-constrained and thermally demanding environments.
FAQ
What is the factory-programmed I²C address of the MCP3426A1T-E/MC?
The MCP3426A1T-E/MC has its I²C address permanently programmed at the factory and does not use external Adr0/Adr1 pins like the MCP3427/3428. Its default 7-bit address is 0x68 (with A0 = 0) or 0x69 (with A0 = 1), configurable via the A0 pin on the device. This simplifies multi-device bus design by eliminating external address jumpers required for other variants in the family.
How does the MCP3426A1T-E/MC achieve 10 ppm INL performance?
The MCP3426A1T-E/MC achieves 10 ppm INL through a combination of laser-trimmed on-chip resistor networks, matched transistor pairs in the delta-sigma modulator, and per-conversion self-calibration that corrects residual offset and gain errors. This specification is measured at 15 SPS in 16-bit mode with PGA = 1 and applies across the full -40°C to +85°C operating range.
Can the MCP3426A1T-E/MC operate with a 2.5V supply?
No-the MCP3426A1T-E/MC requires a minimum supply voltage of 2.7V per its Absolute Maximum Ratings and Electrical Characteristics tables. Operation below 2.7V risks improper POR reset behavior, unstable reference generation, and non-compliant I²C logic thresholds; validated performance is guaranteed only within 2.7V–5.5V.
What is the role of the exposed thermal pad (EP) on the MCP3426A1T-E/MC DFN package?
The exposed thermal pad (EP) on the MCP3426A1T-E/MC DFN package is internally connected to VSS and must be soldered to a PCB copper pour tied to the system ground plane. It provides critical thermal dissipation (θJA = 84.5°C/W) and reduces ground bounce noise-omitting EP connection degrades both thermal reliability and 16-bit measurement accuracy due to increased junction temperature and analog ground instability.
Does the MCP3426A1T-E/MC support single-ended input configurations?
Yes-the MCP3426A1T-E/MC supports single-ended inputs by connecting CHn− to VSS while applying the signal to CHn+. This configuration halves the effective full-scale range (to ±2.048V/PGA) and reduces common-mode rejection, but retains all other specifications including INL, noise, and calibration. Single-ended use is documented in Figure 6-4 of DS22226A.
MCP3426A1T-E/MC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VFDFN Exposed Pad
- 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-DFN (2x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MCP3426A1T-E/MC FAQ
1.How can I place an order for MCP3426A1T-E/MC through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP3426A1T-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 MCP3426A1T-E/MC reliable?
The price and inventory of MCP3426A1T-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 MCP3426A1T-E/MC is usually 5 days.
3.What payment methods are accepted for MCP3426A1T-E/MC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP3426A1T-E/MC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP3426A1T-E/MC?
MCP3426A1T-E/MC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP3426A1T-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 MCP3426A1T-E/MC?
For technical support, including MCP3426A1T-E/MC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP3426A1T-E/MC requirements.
6.How does Aetrix verify that MCP3426A1T-E/MC is sourced from the original manufacturer or authorized distributors?
All MCP3426A1T-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 MCP3426A1T-E/MC meets industry standards.
7.What is the process for return or replacement of MCP3426A1T-E/MC?
All MCP3426A1T-E/MC units undergo pre-shipment inspection (PSI). If there is an issue with MCP3426A1T-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 MCP3426A1T-E/MC part is unused and in its original packaging.
Return procedure for MCP3426A1T-E/MC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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