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Microchip Technology MCP3428-E/SL
- Part No.:
- MCP3428-E/SL
- Manufacturer:
- Microchip Technology
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MCP3428-E/SL.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,861
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Product details
Overview
MCP3428-E/SL from Microchip Technology is a 16-bit ΔΣ analog-to-digital converter with four 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 with self-calibrating offset/gain and operates from 2.7V to 5.5V across –40°C to +125°C - used in high-accuracy bridge sensing and RTD-based temperature measurement systems.
For engineers reviewing the MCP3428-E/SL datasheet, MCP3428-E/SL pinout, MCP3428-E/SL application, or MCP3428-E/SL equivalent, key selection criteria include differential channel count (4), guaranteed INL (10 ppm FSR), PGA-configurable input range (±2.048V / PGA), low standby current (≤1 µA), and TSSOP-14/SOIC-14 package compatibility for space-constrained industrial sensor nodes.
Technical Context
The MCP3428-E/SL implements a delta-sigma modulator with integrated sinc filter, on-chip oscillator, and auto-calibrating conversion engine that corrects offset and gain per sample. Its 4-channel analog multiplexer routes inputs to a single ΔΣ core, enabling time-multiplexed sampling without external switching.
It uses a switched-capacitor front-end with 3.2 pF sampling capacitor and supports both one-shot (9 µA typical @16-bit) and continuous (135 µA @3V) operation. The I²C address is set via two external pins (Adr0/Adr1), allowing eight unique addresses on a shared bus - critical for multi-sensor configurations in factory automation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution & Data Rate | 16-bit @15 SPS, 14-bit @60 SPS, 12-bit @240 SPS - enables trade-off between precision and throughput in battery-powered instrumentation |
| Differential Input Range | ±2.048V / PGA - full-scale range scales inversely with PGA gain (e.g., ±256 mV at x8), supporting microvolt-level signal capture |
| INL Error | 10 ppm of full scale range - ensures ≤0.001% linearity error over temperature, critical for weigh scale calibration |
| On-board Reference | 2.048V ±0.05% (15 ppm/°C drift) - eliminates need for external reference and reduces BOM count in portable devices |
| Supply Current | 135 µA typical (continuous, VDD=3V); 0.56 µA typical (one-shot, 12-bit mode) - extends battery life in fuel gauge and sensor logging applications |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial control environments |
| I²C Interface | Standard (100 kHz), Fast (400 kHz), High-Speed (3.4 MHz) - supports real-time data streaming in PLC backplanes |
Pinout & Package
The MCP3428-E/SL is available in 14-pin SOIC and TSSOP packages. Both variants share identical pin mapping and require the exposed thermal pad (EP) to be connected to VSS for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH1+ / CH1− CH2+ / CH2− CH3+ / CH3− CH4+ / CH4− | Differential analog input pairs | Four independent 2-wire differential channels; CHn− may be tied to VSS for single-ended use - enables simultaneous multi-sensor acquisition |
| VDD, VSS | Power supply and ground | VDD accepts 2.7–5.5V; VSS must connect to analog ground plane and EP - decoupling with 0.1 µF ceramic + 10 µF tantalum required for noise immunity |
| SDA, SCL | I²C bidirectional data/clock | Open-drain pins requiring pull-up resistors (5–10 kΩ for standard/fast mode); support multi-master arbitration and clock stretching |
| Adr0, Adr1 | I²C address selection inputs | Two logic inputs setting 3-bit address (A2/A1/A0); float = VDD/2 (logic high), VSS = low, VDD = high - enables up to 8 devices on same bus |
Key Features
| Feature | Design Value |
|---|---|
| Self-calibrating offset and gain | Per-sample correction eliminates drift-induced errors without host intervention - maintains accuracy across thermal cycles in unattended equipment |
| Programmable gain amplifier (x1/x2/x4/x8) | Configurable front-end amplification enables direct connection to low-output sensors (e.g., 350 Ω strain gauges) without external op-amps |
| Differential input architecture | Rejects common-mode noise >105 dB (DC, PGA=1) - essential for noisy factory floors and motor drive feedback loops |
| Low-power one-shot mode | 0.56 µA standby current at 12-bit resolution - allows microcontroller wake-on-conversion for ultra-low-duty-cycle sensor polling |
| Internal 2.048V reference | ±0.05% initial accuracy with 15 ppm/°C drift - meets Class 0.1 metrology requirements without trimming or calibration firmware |
Applications
| Bridge Sensing | RTD Temperature Measurement |
|---|---|
Use Scenario: Precision measurement of pressure, force, or strain using Wheatstone bridge transducers in industrial weighing systems. IC Role / Device Role / Timing Role: ADC front-end converting mV-level bridge output to digital with 16-bit resolution and PGA gain scaling. Use Value: 10 ppm INL and self-calibration ensure <±0.01% full-scale error over temperature - meets OIML R76 Class III requirements. |
Use Scenario: High-stability temperature monitoring in HVAC controllers using Pt100/1000 RTDs with 2-/3-/4-wire configurations. IC Role / Device Role / Timing Role: Four-channel differential ADC acquiring RTD voltage drops while rejecting lead resistance and EMI. Use Value: Four independent channels allow simultaneous multi-point sensing; PGA gain compensates for low RTD excitation currents. |
| Thermocouple Interfaces | Battery Fuel Gauging |
Use Scenario: Cold-junction compensated thermocouple measurement in furnace controls and process instrumentation. IC Role / Device Role / Timing Role: Differential ADC digitizing thermocouple EMF while measuring reference junction temperature via internal or external sensor. Use Value: 16-bit resolution resolves <1°C increments; extended –40°C to +125°C range covers ambient and hot-side junctions. |
Use Scenario: State-of-charge estimation in lithium-ion battery packs using voltage, current, and temperature monitoring. IC Role / Device Role / Timing Role: Multi-channel ADC capturing cell voltages, shunt resistor drops, and thermistor readings in single IC. Use Value: Low 0.56 µA standby current minimizes quiescent drain during sleep; self-calibration maintains long-term SoC accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit multi-channel ΔΣ ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS114S08BIPW | 8-channel, SPI interface, integrated excitation current sources, no on-board reference | Designed for RTD/thermocouple sensor modules requiring programmable bias currents | Choose ADS114S08BIPW when needing >4 channels or integrated current sources; requires external reference and SPI host. |
| MCP3424-E/SL | 4-channel like MCP3428-E/SL but lacks Adr0/Adr1 pins - fixed I²C address (0x68/0x69) | Suitable for single-device systems where bus address flexibility is unnecessary | Choose MCP3424-E/SL for simplified layout in cost-sensitive single-sensor designs; not scalable to multi-device networks. |
Compared with ADS114S08BIPW and MCP3424-E/SL, the MCP3428-E/SL uniquely combines I²C address configurability, on-board reference, and self-calibration in a 4-channel 16-bit ΔΣ ADC - making it optimal for modular, multi-node sensor systems where board space, BOM count, and calibration overhead must be minimized.
Availability
MCP3428-E/SL is available at Aetrix Electronics and suitable for industrial process control, battery management systems, and precision instrumentation requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MCP3428-E/SL 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 automotive, industrial, 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 integration, self-test capability, and ease of system-level calibration.
FAQ
What is the maximum differential input voltage range supported by the MCP3428-E/SL?
The MCP3428-E/SL supports a differential input full-scale range of ±2.048V divided by the selected PGA gain (x1/x2/x4/x8). At PGA=1, this equals ±2.048V; at PGA=8, it reduces to ±256 mV. Exceeding this range causes saturation (all 0s or all 1s except sign bit), not damage - but accurate conversion requires staying within ±(2.048V / PGA).
Does the MCP3428-E/SL require an external voltage reference?
No, the MCP3428-E/SL includes an integrated 2.048V ±0.05% voltage reference with 15 ppm/°C drift. This reference is used internally for ADC conversion and cannot be accessed externally. Its accuracy and stability eliminate the need for external references in most precision applications, reducing BOM cost and PCB area.
How many I²C addresses can be configured on the MCP3428-E/SL?
The MCP3428-E/SL supports eight unique I²C addresses via two hardware-selectable pins (Adr0 and Adr1), each configurable as logic low (VSS), logic high (VDD), or floating (VDD/2). This enables up to eight MCP3428-E/SL devices on a single I²C bus without address conflicts - ideal for distributed sensor networks.
What is the minimum supply current consumption of the MCP3428-E/SL in standby mode?
In one-shot mode with 12-bit resolution, the MCP3428-E/SL consumes 0.56 µA typical at VDD=3V after conversion completes and before the next command. This ultra-low standby current is achieved by automatically entering shutdown mode - making it suitable for battery-powered data loggers requiring years of operation on a single cell.
Can the MCP3428-E/SL perform single-ended measurements?
Yes, the MCP3428-E/SL supports single-ended operation by connecting the CHn− pin to VSS for any channel (CH1 through CH4). While differential mode provides superior noise rejection, single-ended use simplifies connections for unipolar sensors or when common-mode voltage is stable and known - with full-scale range remaining ±2.048V / PGA.
MCP3428-E/SL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 15
- Number of Inputs:
- 4
- 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, Selectable Address
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 14-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MCP3428-E/SL FAQ
1.How can I place an order for MCP3428-E/SL through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP3428-E/SL 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 MCP3428-E/SL reliable?
The price and inventory of MCP3428-E/SL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP3428-E/SL is usually 5 days.
3.What payment methods are accepted for MCP3428-E/SL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP3428-E/SL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP3428-E/SL?
MCP3428-E/SL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP3428-E/SL 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 MCP3428-E/SL?
For technical support, including MCP3428-E/SL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP3428-E/SL requirements.
6.How does Aetrix verify that MCP3428-E/SL is sourced from the original manufacturer or authorized distributors?
All MCP3428-E/SL 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 MCP3428-E/SL meets industry standards.
7.What is the process for return or replacement of MCP3428-E/SL?
All MCP3428-E/SL units undergo pre-shipment inspection (PSI). If there is an issue with MCP3428-E/SL, 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 MCP3428-E/SL part is unused and in its original packaging.
Return procedure for MCP3428-E/SL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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