MCP 3428 Microchip Integrated Circuit (Small Outline Packages) In Stock
MCP3428 is a 4-channel, 16-bit delta-sigma ADC with I2C interface from Microchip, featuring programmable gain amplifier (PGA) with gains of 1x, 2x, 4x, and 8x, and operating from 2.7 V to 5.5 V supply. Designed for precision measurement in industrial and portable applications.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 14
- Lifecycle
- ACTIVE
- Datasheet
- MCP 3428 Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 16-bit delta-sigma ADC with 4 differential input channels
- I2C interface supporting up to 8 devices on one bus
- Programmable gain amplifier (PGA): 1x, 2x, 4x, 8x
- Supply voltage range: 2.7 V to 5.5 V
- Continuous, one-shot, or single-conversion modes
- On-chip voltage reference: 2.048 V
Applications
The MCP3428 is commonly used in precision industrial sensor measurement systems, medical instruments, and portable data acquisition equipment where high-resolution analog-to-digital conversion from low-amplitude signals is required. It suits battery-powered designs and multi-channel temperature or strain gauge measurement due to its low-power operation and differential inputs.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for MCP 3428:
Frequently Asked Questions
How many differential input channels does the MCP3428 support, and what is its maximum resolution?
The MCP3428 provides 4 differential input channels and delivers up to 16-bit resolution in its delta-sigma conversion mode, making it well-suited for precision measurement applications requiring low noise and high accuracy across multiple sensor inputs.
What PGA gain settings are available on the MCP3428, and how do they affect input range?
The MCP3428 offers a programmable gain amplifier with 4 gain settings: 1x, 2x, 4x, and 8x. At a 16-bit resolution and 1x gain, the differential input range spans ±2.048 V; increasing the gain narrows the input range proportionally, allowing amplification of small signals like those from thermocouples or bridge sensors.
Which supply voltage range is compatible with the MCP3428, and can it operate in 3.3 V systems?
The MCP3428 operates from a 2.7 V to 5.5 V supply, which means it is fully compatible with 3.3 V systems as well as 5 V designs. This wide range makes it suitable for both microcontroller-based embedded systems and battery-powered portable instruments.
How many MCP3428 devices can share a single I2C bus in a multi-sensor design?
Up to 8 MCP3428 devices can coexist on a single I2C bus by using different address pin configurations. Each device is addressable via 3 address bits, enabling a system to acquire data from 32 differential channels (8 devices × 4 channels) without adding bus switches or extra wiring.
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