The LT1997-2 of Analog Devices is an attenuating differential amplifier, which can be used to convert large differential signals to the low voltage range compatible with adc. The LT1997-3 combines an accurate operational amplifier with a highly matched resistor to form a chip solution that accurately amplifies the voltage.
The LT1997-2 combines an accurate op amp with a highly matched resistor to form a single chip solution that uses external components accurately for attenuation and level transfer voltages. It has three standard pin selectable gain options (0.1, 0.2 and 0.25), which can be further combined to form a gain from 0.0455 to 0.55 (attenuation 1.82 to 22) with an accuracy of 0.006% (60 ppm). LT1997-2 also operates in a very wide input common mode voltage range (± 255 V), enabling robust operation in harsh industrial environments. Its excellent resistance matching results make the common mode rejection ratio more than 105 dB.
The LT1997-3 is particularly suitable for use as a differential amplifier. The excellent resistance matching results in a common mode rejection ratio greater than 91dB. The amplifier has 60 μ Maximum input bias voltage of V and - 3 dB bandwidth of 1.1 MHz (gain=1). LT1997-3 works at any power supply voltage between 3.3 V and 50 V, and only draws 350 μ A supply current. The output usually fluctuates within 100mv of the power rail.
LT1997 is fully specified at 5 V and ± 15 V power supply, from - 40 ° C to+125 ° C. These devices are 16 pin MSOP and 4 mm × 4 mm DFN14 package. LT1997 is an ideal high side low sensor, ADC driver, and industrial data acquisition front-end.
