Analog Devices Inc. LTC6373 Instrumentation Amplifier

Analog Devices Inc. LTC6373 Instrumentation Amplifier is a precision instrumentation amplifier with fully differential outputs. These outputs include a closely matched internal resistor network to achieve excellent CMRR, offset voltage, gain error, gain drift, and gain nonlinearity. The user can easily program the gain to one of seven available settings through a 3-bit parallel interface (A2 to A0). The 8th state puts the part in shutdown, which reduces the current consumption to 220μA. Unlike a conventional voltage feedback amplifier, the LTC6373 maintains nearly the same bandwidth across all its gain settings.

The Analog Devices Inc. LTC6373 Instrumentation Amplifier features fully differential outputs to drive high-performance, differential-input ADCs. The output common-mode voltage is independently adjustable via the VOCM pin. The combination of high impedance inputs, DC precision, 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 4mm x 4mm DFN (LFCSP) package and is fully specified over the -40°C to +125°C temperature range.

Features

Pin-programmable gains
- G = 0.25, 0.5, 1, 2, 4, 8, 16V/V + Shutdown
Fully differential outputs
0.012% (Max) gain error
1ppm/°C (Max) gain error drift
103dB (Min), G = 16 CMRR
25pA (Max) input bias current
92μV (Max), G = 16 input offset voltage
1.7μV/°C (Max), G = 16 input offset voltage drift

4MHz, G = 16 –3dB bandwidth
8nV/√Hz, G = 16 input noise density
12V/μs, G = 16 slew rate
Adjustable output common mode voltage
4.4mA quiescent supply current
±4.5V to ±18V supply voltage range
–40°C to +125°C specified temperature range
Small 12-lead 4mm x 4mm DFN (LFCSP) package

Applications

Data acquisition systems
Biomedical instrumentation
Test and measurement equipment

Differential ADC drivers
Single-ended-to-differential conversion
Multiplexed applications

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