MCP6S22T-I/MS

Overview

The MCP6S22T-I/MS is a two-channel analog Programmable Gain Amplifier (PGA) from Microchip Technology, housed in an 8-lead MSOP package. It supports gains from +1 V/V to +32 V/V via SPI control and features rail-to-rail input/output operation on a single supply ranging from 2.5V to 5.5V. Key electrical specifications include a maximum input offset voltage of ±275 µV, a typical quiescent current of 1.0 mA, and a bandwidth between 2 MHz and 12 MHz depending on the gain setting.

Feature Summary

• Integrates a multiplexer for selecting between two analog input channels through a serial interface.
• Provides programmable voltage gains ranging from +1 V/V to +32 V/V with low gain error.
• Supports rail-to-rail input and output capabilities for flexible single-supply operation.

Applications

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

Procurement Notes

Verify that the ordering suffix 'I' corresponds to the industrial temperature range (-40°C to +85°C) and '/MS' indicates the MSOP package type as specified in the datasheet. Confirm that the device requires the VSS pin to be tied directly to ground to avoid noise issues due to internal reference connections.

Selection Notes

Select this component when a dual-channel PGA with SPI control is required. The MCP6S22 is suitable for applications needing rail-to-rail performance and low offset. Ensure the design accommodates the internal connection of VREF to VSS, which differs from other family members like the MCP6S26.

Part Context

This part belongs to the MCP6S21/2/6/8 family of single-ended, rail-to-rail, low-gain PGAs. While the MCP6S21 offers one channel and the MCP6S26 provides six, the MCP6S22 specifically addresses designs requiring exactly two selectable inputs within an 8-pin footprint.

Replacement Considerations

Direct substitutes within the same package and channel count are limited. The MCP6S21 serves as a functional alternative if only one channel is needed. Cross-model replacements like the MCP6S26 require PCB layout changes due to different pin counts and package options.

FAQ

How is the VREF pin handled in the MCP6S22?

Unlike other devices in the family, the VREF pin on the MCP6S22 is tied internally to VSS. Designers should connect the VSS pin directly to ground to prevent noise problems.

What is the input bias current specification?

The input bias current is typically 1 pA at +25°C, increasing to a maximum of 250 pA across the full operating temperature range of -40°C to +85°C.