Analog Devices ADI‘s LTC6373 is a precision instrumentation amplifier with fully differential outputs that includes a highly matched internal resistor network for excellent common-mode rejection ratio (CMRR) and very low gain error, gain drift, and gain non-linearity. linear. The user can easily program the gain to one of seven available settings via the 3-bit parallel interface (A2 to A0). The eighth state is the shutdown state, and the current consumption is reduced to 250μA.

The LTC6373 has fully differential outputs to drive high performance, differential input ADCs. The output common-mode voltage is independently adjustable through the V(OCM) pin. The combination of high impedance input, DC accuracy, low noise, low distortion and high speed differential ADC drive makes the LTC6373 an ideal candidate for optimizing data acquisition systems.

The LTC6373 is available in a 12-lead 4 mm x 4 mm DFN (LFCSP) package and is fully specified over the -40°C to +125°C temperature range.

Demonstration circuit DC2398A uses the LTC6373 programmable gain instrumentation amplifier. The gain of the circuit can be controlled in several ways, such as simply setting the onboard jumpers or connecting an Arduino or Linduino (DC2026A) microcontroller board. The LTC6373 has fully differential outputs with independent common-mode level switching. The output common mode level can be set by default within the IC or set by the user.

The DC2398A can be powered from an external bench supply (typically ±15v), but optionally demonstrates the use of the LTC3265 dual low noise charge pumps to generate ±15v rails from a single 9v to 12v input supply. Design files for this board are available.

Features of the Analog Devices LTC6373 amplifier:

1. The ultra-high input impedance makes the sensor-agnostic interface easy to interface with any sensor;

2. No signal error;

3. The platform enables the front end to provide programmable gain and low input bias current;

4. Directly drive multiple ADI ADCs to reduce components, power consumption and design time.

Applications for the Analog Devices LTC6373 amplifier:

1. Instrumentation: electrical test and measurement, ATE;

2. Industrial automation: process control;

3. Aerospace and Defense: DAQ;

4. Energy: Data collection.