Description

The 6915CL is a precision programmable gain instrumentation amplifier IC designed by LTC. The gain can be programmed to 14 different levels ranging from 0 to 4096 through a parallel or serial interface. It has a CMRR of 125dB with a single 5V supply at any programmed gain. The offset is less than 10µV with a temperature drift of less than 50nV/°C.

Specifications and Features

Some of the main specifications and features of the 6915CL IC are:

• 14 levels of programmable gain
• 125dB CMRR independent of gain
• 0.1% gain accuracy (typical)
• Maximum offset voltage of 10µV
• Maximum offset voltage drift: 50nV/°C
• Rail-to-rail input and output
• Parallel or serial (SPI) interface for gain setting
• Supply operation: 2.7V to ±5.5V
• Typical noise: 2.5µVP-P (0.01Hz to 10Hz)
• 16-lead SSOP and 12-lead DFN packages

Application Scenarios

The 6915CL IC is particularly well-suited for the following applications:

• Thermocouple amplifiers
• Electronic scales
• Medical instrumentation
• Strain gauge amplifier
• High resolution data acquisition

Comparison

• High precision and programmable gain
• Low offset voltage and drift
• Wide supply voltage range
• Rail-to-rail input and output

• May not be suitable for applications requiring higher gain levels than 4096
• 16-lead SSOP and 12-lead DFN packages may not be compatible with all devices