MCP6S92T-E/SN

Overview

The MCP6S92T-E/SN is a single-supply, dual-channel analog Programmable Gain Amplifier (PGA) from Microchip Technology. It features an integrated input multiplexer selectable via a Serial Peripheral Interface (SPI). The device supports eight discrete gain settings ranging from +1 V/V to +32 V/V. It operates on a single supply voltage between 2.5V and 5.5V with rail-to-rail input and output capabilities. The component includes shutdown functionality for power conservation and is specified for operation across an extended temperature range of -40°C to +125°C.

Feature Summary

• Integrated SPI-controlled multiplexer allows selection between two independent analog input channels.
• Configurable gain settings provide flexibility for signal conditioning applications requiring variable amplification.
• Rail-to-rail input and output stages maximize dynamic range in single-supply systems.
• Dedicated shutdown mode significantly reduces quiescent current consumption when the amplifier is inactive.

Applications

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

Procurement Notes

Verify that the ordering suffix 'SN' corresponds to the SOIC-8 package type required for your PCB layout. Confirm the '-E' designation aligns with the industrial temperature range specifications. Ensure the datasheet version matches the specific revision intended for production to avoid discrepancies in electrical characteristics or pin definitions during implementation.

Selection Notes

Select this component when a design requires simultaneous handling of two analog signals with programmable amplification levels. The internal multiplexer simplifies circuit topology by eliminating external switching components. Consider the SPI interface requirements for digital control logic compatibility. Evaluate the bandwidth and noise performance against the specific signal frequencies present in the application environment.

Part Context

This part belongs to the MCP6S91/2/3 family of single-ended, low-gain error programmable gain amplifiers. The MCP6S92 specifically denotes the two-channel variant within this series. It shares architectural similarities with the MCP6S91 (single channel) and MCP6S93 (two-channel, 10-pin package), offering consistent performance metrics across the family while differing in channel count and physical footprint.

Replacement Considerations

Direct substitutes include the MCP6S91T-E/SN for single-channel applications or the MCP6S93T-E/SN if a 10-pin MSOP package is acceptable. Verify pinout compatibility and package dimensions before swapping to ensure mechanical fit and electrical connectivity remain unchanged in the existing design.

FAQ

How does the MCP6S92 handle unused analog inputs?

Unused analog inputs should be left floating to maintain the lowest input bias current. Alternatively, they can be tied to a voltage near the active channel's bias voltage, or connected to VSS or VDD, though this may increase input current.

What is the function of the VREF pin on the MCP6S92?

On the MCP6S92, the VREF pin is internally tied to VSS. This configuration couples VSS to the internal amplifier, meaning the Power Supply Rejection Ratio specification describes PSRR+ only. It is recommended to tie the VSS pin directly to ground to avoid noise problems.