MCP6S22T-I/SN

Overview

The MCP6S22T-I/SN is a dual-channel, single-supply, rail-to-rail input/output programmable gain amplifier (PGA) manufactured by Microchip Technology. It features an integrated analog multiplexer allowing selection between two independent channels via a Serial Peripheral Interface (SPI). The device supports eight selectable voltage gains ranging from +1 V/V to +32 V/V. Key electrical specifications include a maximum input offset voltage of ±275 µV, a typical quiescent supply current of 1.0 mA, and a bandwidth varying from 2 MHz to 12 MHz depending on the selected gain. It operates within a supply voltage range of 2.5V to 5.5V and is housed in an 8-pin SOIC package.

Feature Summary

• Integrates a dual-channel analog multiplexer for selecting between two signal inputs.
• Provides eight discrete gain settings configurable via a standard SPI interface.
• Supports rail-to-rail input and output operation for maximum dynamic range.
• Includes a dedicated shutdown mode to minimize power consumption.

Applications

• A/D converter driver circuits
• Multiplexed analog data acquisition systems
• Industrial instrumentation signal conditioning
• Medical instrumentation front-ends

Procurement Notes

Verify that the ordering suffix 'I' corresponds to the industrial temperature range (-40°C to +85°C) and 'SN' denotes the 8-pin SOIC package. Confirm the 'T' suffix indicates tape and reel packaging if required for automated assembly. Ensure the specific revision level matches the design requirements, as datasheet updates may occur.

Selection Notes

Select this component when a dual-channel PGA with low offset and high speed is required. The MCP6S22 is distinct from the MCP6S21 due to its second channel and from the MCP6S26/MCP6S28 due to having fewer channels. Note that the VREF pin is internally tied to VSS for this specific model, unlike other family members.

Part Context

This part belongs to the MCP6S21/2/6/8 family of single-ended, rail-to-rail I/O PGAs. While sharing core architecture and SPI control logic, the MCP6S22 is specifically defined by its two-channel multiplexer configuration. It shares the same 8-pin footprint options as the single-channel MCP6S21 but offers expanded input capability.

Replacement Considerations

MCP6S21T-I/SN

FAQ

How does the MCP6S22 handle the VREF pin?

Unlike other devices in the family, the MCP6S22 has the VREF pin tied internally to VSS. Consequently, the Power Supply Rejection Ratio specification describes PSRR+ only.

What is the function of the SPI interface?

The SPI interface controls the channel selection between CH0 and CH1, sets the gain value from the available options, and enables the shutdown mode to conserve power.