MCP6S28-I/SL

Overview

The MCP6S28-I/SL is an eight-channel analog Programmable Gain Amplifier (PGA) from Microchip Technology, housed in a 16-pin SOIC package. It supports single-supply operation between 2.5V and 5.5V with a typical quiescent current of 1.0 mA. The device features rail-to-rail input and output capabilities, allowing signals to operate close to the supply rails. It offers eight selectable gain settings ranging from +1 V/V to +32 V/V, controlled via a Serial Peripheral Interface (SPI). The component provides a high bandwidth of up to 12 MHz and low offset voltage of ±275 µV max.

Feature Summary

• Integrates an eight-channel input multiplexer with SPI-controlled gain selection for flexible signal conditioning.
• Features rail-to-rail input and output stages optimized for single-supply operation.
• Includes a shutdown mode accessible through the serial interface to minimize power consumption.

Applications

• A/D Converter Driver
• Multiplexed Analog Applications
• Data Acquisition Systems
• Industrial Instrumentation

Procurement Notes

Verify the specific suffix 'I/SL' corresponds to the industrial temperature range (-40°C to +85°C) and SOIC-16 package configuration. Confirm that the ordering part number matches the datasheet identifier MCP6S28-I/SL to ensure correct channel count and performance specifications are received.

Selection Notes

Select this component when designing systems requiring digital control over both input channel selection and amplification gain. It is suitable for applications needing to interface multiple sensors with varying signal levels into a single ADC path without external discrete switching components.

Part Context

This device belongs to the MCP6S2X family of programmable gain amplifiers, which includes variants with one, two, six, or eight channels. The MCP6S28 specifically provides the highest channel density within this series, utilizing a 16-pin package to accommodate all eight analog inputs alongside necessary control and power pins.

Replacement Considerations

MCP6S28-E/SL

FAQ

How does the MCP6S28 handle unused analog input channels?

Unused input channels should be left floating to maintain the lowest input bias current. Alternatively, they can be tied to a voltage near the active channels, though connecting them directly to VSS or VDD may increase input current.

What is the function of the SO pin on the MCP6S28?

The SO pin serves as the SPI Serial Data Output. It allows the device to support daisy-chain configurations by providing data feedback, ensuring proper synchronization in multi-device systems.