MCP6S22-I/MS

Overview

The MCP6S22-I/MS is a two-channel analog Programmable Gain Amplifier (PGA) from Microchip Technology, housed in an 8-pin MSOP package. It operates on a single supply voltage ranging from 2.5V to 5.5V with a typical quiescent current of 1.0 mA. The device supports eight gain selections: +1, +2, +4, +5, +8, +10, +16, and +32 V/V. It features rail-to-rail input and output capabilities, a maximum input offset voltage of ±275 µV, and a bandwidth between 2 MHz and 12 MHz. Configuration is managed via a Serial Peripheral Interface (SPI).

Feature Summary

• Integrates a dual-channel input multiplexer allowing selection between CH0 and CH1.
• Provides digitally programmable gain settings ranging from +1 V/V to +32 V/V.
• Features rail-to-rail input and output stages for extended dynamic range operation.
• Includes a shutdown mode accessible through the SPI 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' indicates the industrial temperature range (-40°C to +85°C) and 'MSOP' denotes the 8-lead Mini Small Outline Package. Confirm that the internal connection of the VREF pin to VSS aligns with system ground requirements, as this differs from other variants in the family. Ensure SPI timing parameters match the microcontroller interface specifications.

Selection Notes

Select the MCP6S22 when a dual-channel signal path is required within a compact footprint. This variant is distinct because its VREF pin is internally tied to VSS, simplifying external reference circuitry compared to the MCP6S21 or MCP6S26. It is suitable for applications needing flexible gain adjustment without additional discrete components.

Part Context

This component belongs to the MCP6S2X family of single-ended, rail-to-rail PGAs. While sharing core amplifier architecture with the MCP6S21, MCP6S26, and MCP6S28, the MCP6S22 specifically provides two analog inputs. It shares the same low noise and high speed characteristics optimized for single-supply data acquisition environments.

Replacement Considerations

The MCP6S21 serves as a functional substitute if only one channel is utilized. For systems requiring more than two channels, the MCP6S26 (six channels) or MCP6S28 (eight channels) are compatible alternatives, though they require different pinout accommodations and package types.

FAQ

How does the MCP6S22 handle the VREF pin?

Unlike other members of the MCP6S2X family, the VREF pin on the MCP6S22 is internally tied to VSS. Users should connect the VSS pin directly to ground to avoid potential noise issues.

What is the maximum operating frequency for the SPI interface?

The maximum SCK frequency is 10 MHz when operating at a supply voltage of 5V. Lower frequencies may be required at reduced supply voltages.