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Microchip Technology MCP3426A6-E/MC
- Part No.:
- MCP3426A6-E/MC
- Manufacturer:
- Microchip Technology
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-VFDFN Exposed Pad
- Datasheet:
-
MCP3426A6-E/MC.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,872
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Product details
Overview
MCP3426A6-E/MC 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, ±2.048V differential full-scale range, and 10 ppm INL - enabling high-accuracy bridge and RTD sensing in portable instrumentation.
For engineers reviewing the MCP3426A6-E/MC datasheet, MCP3426A6-E/MC pinout, MCP3426A6-E/MC application, or MCP3426A6-E/MC equivalent, key selection criteria include its factory-programmed I²C address, 8-pin SOIC/MSOP/DFN package compatibility, self-calibrating offset/gain per conversion, and ultra-low 0.56 µA standby current in 12-bit one-shot mode.
Technical Context
The MCP3426A6-E/MC implements a delta-sigma modulator with integrated PGA, on-chip oscillator, and auto-calibration logic that corrects offset and gain errors before each conversion. Its switched-capacitor front-end uses a 3.2 pF sampling capacitor and supports differential or single-ended inputs per channel.
It operates across 2.7V–5.5V supply and -40°C to +125°C, with internal reference drift of 15 ppm/°C and common-mode rejection of 110 dB at PGA=8. Conversion modes include one-shot (with automatic shutdown) and continuous, with data rates tightly coupled to resolution: 15/60/240 SPS for 16/14/12 bits.
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 ±256 mV full-scale with PGA=8, critical for low-level sensor signals. |
| INL Error | 10 ppm of FSR - translates to ±0.66 LSB at 16-bit, ensuring linearity for precision weigh scales. |
| Supply Current | 135 µA typical (3V, continuous); 0.56 µA typical (12-bit one-shot) - supports battery-powered RTD monitoring. |
| I²C Modes | Standard (100 kHz), Fast (400 kHz), High-Speed (3.4 MHz) - allows flexible host controller integration. |
| Reference Accuracy | 2.048 V ±0.05% (±1.024 mV) - eliminates need for external reference in portable instrumentation. |
| Operating Temp | -40°C to +125°C - qualified for industrial automation and automotive cabin temperature sensing. |
Pinout & Package
The MCP3426A6-E/MC is housed in an 8-pin SOIC package (also available in MSOP and 2×3 DFN). Pin functions are identical across these packages; the exposed thermal pad (EP) in DFN must be connected to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH1+, CH1- | Differential analog input channel 1 | Supports true differential measurement or single-ended (CH1- tied to VSS); max input ±2.048V/PGA. |
| CH2+, CH2- | Differential analog input channel 2 | Independent second channel; identical specs to CH1; enables dual-sensor monitoring without multiplexer. |
| VDD, VSS | Power supply and ground | 2.7–5.5V operation; requires 0.1 µF ceramic bypass cap at VDD; VSS must connect to low-impedance analog ground. |
| SDA, SCL | I²C bidirectional data and clock | Open-drain pins requiring pull-up resistors (5–10 kΩ); support multi-master bus with configurable address. |
Key Features
| Feature | Design Value |
|---|---|
| On-board 2.048V reference | ±0.05% initial accuracy and 15 ppm/°C drift - removes external reference cost and layout area. |
| Programmable Gain Amplifier | Gains of x1, x2, x4, x8 - extends effective dynamic range to resolve µV-level signals from strain gauges. |
| Per-conversion self-calibration | Automatic offset and gain correction - maintains accuracy across temperature swings and supply ripple. |
| One-shot conversion mode | 0.56 µA standby current (12-bit) - enables >1-year battery life in wireless sensor nodes. |
| Differential input architecture | 105–110 dB CMRR - rejects common-mode noise in noisy factory environments. |
Applications
| Temperature Sensing with RTD | Bridge Sensing for Pressure |
|---|---|
Use Scenario: Measuring Pt100 resistance changes in HVAC control units with ambient temperature ranging from -25°C to +85°C. IC Role / Device Role / Timing Role: Precision 16-bit ADC digitizing ratiometric bridge output; performs auto-calibrated conversions at 15 SPS. Use Value: Delivers ±0.1°C accuracy without external reference or calibration firmware due to on-board 2.048V reference and 10 ppm INL. |
Use Scenario: Reading quarter-bridge outputs from MEMS pressure sensors in medical infusion pumps. IC Role / Device Role / Timing Role: Dual-channel differential ADC acquiring CH1 (sensor) and CH2 (reference) simultaneously to reject supply noise. Use Value: 110 dB CMRR at PGA=8 suppresses common-mode interference from motor drivers, improving pressure resolution by 4×. |
| Weigh Scales | Battery Fuel Gauges |
Use Scenario: Industrial platform scale using full-bridge load cells with 2 mV/V sensitivity and 5 V excitation. IC Role / Device Role / Timing Role: High-resolution ADC with x8 PGA amplifying microvolt-level differential signals; operates in continuous 60 SPS mode. Use Value: 14-bit ENOB at 60 SPS provides 16,384-count resolution over 20 kg range, enabling 1.2 g repeatability. |
Use Scenario: Monitoring Li-ion cell voltage and current sense resistor in portable power tools during discharge cycles. IC Role / Device Role / Timing Role: One-shot 16-bit conversion triggered every 500 ms; enters <1 µA shutdown between reads. Use Value: 0.56 µA standby current extends 2000 mAh battery life by >3 months versus continuous-conversion alternatives. |
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, 860 SPS max; internal 2.048V ref ±0.05%; no PGA auto-calibration; I²C address pins user-configurable. | Higher speed but lacks per-conversion offset/gain calibration - requires system-level compensation for drift. | Select ADS1115IDGSR when multi-channel count >2 is required and calibration overhead is acceptable. |
| MCP3421A0T-E/OT | Single-channel, 18-bit, 15 SPS; same 2.048V ref and PGA; factory-set I²C address; 6-pin SOT-23 package. | Higher resolution but no second channel - unsuitable for differential reference monitoring or dual-sensor systems. | Choose MCP3421A0T-E/OT only for space-constrained single-input applications where 18-bit resolution outweighs channel count. |
Compared with ADS1115IDGSR and MCP3421A0T-E/OT, the MCP3426A6-E/MC uniquely balances dual-channel capability, factory-programmed I²C address, and per-conversion self-calibration - making it optimal for compact, drift-critical industrial sensors where layout area and firmware complexity must be minimized.
Availability
MCP3426A6-E/MC is available at Aetrix Electronics and suitable for portable instrumentation, factory automation equipment, and battery-powered sensor nodes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MCP3426A6-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 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- and power-constrained embedded systems - emphasizing integrated references, self-calibration, and robust I²C interfacing.
FAQ
What is the factory-programmed I²C address of the MCP3426A6-E/MC?
The MCP3426A6-E/MC has its I²C address permanently programmed during manufacturing and cannot be modified via external pins. The base address is 0x68 (1101000b), with the A6 suffix indicating this specific variant. This eliminates address conflicts in multi-device I²C buses and simplifies firmware initialization compared to user-configurable alternatives like the MCP3427.
Does the MCP3426A6-E/MC require external calibration for production use?
No - the MCP3426A6-E/MC performs full offset and gain self-calibration automatically before every conversion. This eliminates the need for external calibration routines or factory trim steps. The on-board 2.048V reference (±0.05%) and 10 ppm INL ensure that calibrated performance is maintained across -40°C to +125°C without user intervention.
Can the MCP3426A6-E/MC measure single-ended signals?
Yes - while optimized for differential inputs, the MCP3426A6-E/MC supports single-ended operation by connecting CHn- to VSS. For example, CH1+ and CH1- (tied to VSS) form a single-ended channel with full-scale range of ±2.048V/PGA. However, common-mode rejection and noise immunity are reduced versus true differential mode.
What is the minimum supply voltage for reliable operation of the MCP3426A6-E/MC?
The MCP3426A6-E/MC operates reliably from 2.7V to 5.5V. At 2.7V, supply current remains within specification (135 µA typical in continuous mode), and all electrical characteristics - including 16-bit linearity and reference accuracy - are guaranteed across the full -40°C to +125°C temperature range per DS22226A.
How does the MCP3426A6-E/MC handle input overvoltage conditions?
The MCP3426A6-E/MC specifies absolute maximum input voltage limits of VSS−0.3V to VDD+0.3V on all analog pins. Exceeding these thresholds forward-biases internal ESD diodes, causing leakage current (>±2 mA) that may saturate the ADC or damage the input structure. External clamping or series resistance is required for overvoltage protection beyond these limits.
MCP3426A6-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:
- 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:
- -
MCP3426A6-E/MC FAQ
1.How can I place an order for MCP3426A6-E/MC through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP3426A6-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 MCP3426A6-E/MC reliable?
The price and inventory of MCP3426A6-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 MCP3426A6-E/MC is usually 5 days.
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MCP3426A6-E/MC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP3426A6-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 MCP3426A6-E/MC?
For technical support, including MCP3426A6-E/MC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP3426A6-E/MC requirements.
6.How does Aetrix verify that MCP3426A6-E/MC is sourced from the original manufacturer or authorized distributors?
All MCP3426A6-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 MCP3426A6-E/MC meets industry standards.
7.What is the process for return or replacement of MCP3426A6-E/MC?
All MCP3426A6-E/MC units undergo pre-shipment inspection (PSI). If there is an issue with MCP3426A6-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 MCP3426A6-E/MC part is unused and in its original packaging.
Return procedure for MCP3426A6-E/MC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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