ADA4177 Reference Design Circuit | Operational Amplifier Application Circuit

Industrial Router Crystal 3.2*2.5mm 3225 26M (26.000MHZ) 12PF 10PPM 20PPM 30PPM

Photocoupler

The ADA4177-1 single-channel, ADA4177-2 dual and ADA4177-4 quad amplifiers feature low offset voltage (2 μV typical) and low drift (1 μV/°C maximum) with low input bias current, low noise, and Low power (500 μA typical) feature. The output is stable with capacitive loads above 1000 pF without external compensation.

The inputs to the ADA4177-1, ADA4177-2, and ADA4177-4 establish a new standard for precision amplifier robustness that provides input protection for signals that deviate from 32 V from any supply and provides electromagnetic interference (EMI) at 1000 MHz. 70 dB rejection.

Applications for this amplifier include sensor signal conditioning (eg thermocouples, RTDs, strain gauges), process control front-end amplifiers, and precision diode power measurements in optical and wireless transmission systems.

ADA4177 Features:

Low offset voltage: 60 μV (max, 25°C, 8-pin and 14-pin SOIC)

Low offset voltage drift: 1 μV/ (max, 8-pin and 14-lead SOIC)

Large signal voltage gain (AVO): 100 dB (minimum, full supply voltage and operating temperature range)

Supports input overvoltage protection above or below supply rail voltage of 32 V

Typical application range of ADA4177:

Wireless base station control circuit

Optical network control circuit

Precision filter

Thermocouple, resistive temperature detector (RTD), strain gauge, shunt measurement

ADA4177 pin wiring diagram:

Figure 1: ADA4177 pin wiring diagram

ADA4177 internal junction schematic:

Figure 2: ADA4177 internal junction schematic

Typical application diagram of ADA4177:

Figure 3: Typical application diagram of the ADA4177 protection precision amplifier

Typical application analysis of the ADA4177 protection precision amplifier:

System designers choose precision op amps for low offset voltage (VOS) and high common-mode rejection ratio (CMRR). Both of these features simplify system calibration and minimize dynamic errors. To maintain these characteristics in the case of electrostatic discharge (ESD), bipolar op amps often have built-in clamping diodes and connect small current limiting resistors in series with their inputs, but these measures cannot cope with fault conditions caused when the input voltage exceeds the supply rail. . In such cases, system designers often add external clamping diodes (D1 and D2) and series resistors (ROVP).

ADA4177 Chinese information: click to download

More popular application circuits with schematics and source code can be found at: