Analog Devices / Maxim Integrated MAX4194-MAX4197 Precision Amplifiers
Analog Devices MAX4194-MAX4197 Micropower Precision Instrumentation Amplifiers use a three-op-amp topology that combines precision specifications and operation from a single +2.7V to +7.5V supply or dual ±1.35V to ±3.75V supplies. The supply current is just 93µA in normal operation and 8µA in shutdown mode with a 500ms enable time and 85µs 0.1% settling time (unity gain). Analog Devices MAX4194-MAX4197 Instrumentation Amplifiers preserve battery life in low-voltage battery-powered systems by pulsing the amplifier on/off at low-duty cycle. These modules feature excellent DC common-mode rejection (CMR) from 95dB to 115dB, depending on gain.
The MAX4194 is unity-gain stable and can be configured for gains up to +1000V/V. At the highest gain, CMR is 115dB. This instrumentation amplifier is offered in three fixed-gain versions: the MAX4195 (G = +1V/V), the MAX4196 (G = +10V/V), and the MAX4197 (G = +100V/V). The fixed-gain instrumentation amplifiers feature a shutdown function that reduces the quiescent current to 8μA.
Features
- +2.7V single-supply operation
- Low power consumption
- 93µA supply current
- 8µA shutdown current (MAX4195 / MAX4196 / MAX4197)
- High common-mode rejection: 115dB (G = +10V/V)
- Input common-mode range extends 200mV below GND
- Low 50µV input offset voltage (G ≥ +100V/V)
- Low ±0.01% gain error (G = +1V/V)
- 250kHz -3dB bandwidth (G = +1V/V, MAX4194)
- Rail-to-rail outputs
Applications
- 4mA to 20mA Loop transmitters
- Battery-powered/portable equipment
- Bridge amplifier
- Data acquisition systems
- Medical equipment
- Thermocouple amplifiers
- Transducer interface
Published: 2012-03-28
| Updated: 2023-04-18