The AS1713 is a low cost CMOS difference amplifier providing extended common mode voltage range for a single rail 5V supply. Resistor trimming during final test ensures a typical common mode rejection of 60dB. Low input bias currents, 10MHz gain bandwidth, low total harmonic distortion (THD) and a rail-to-rail output drive capability of typically 200mA (@ 5V supply) provide support for a number of signal processing applications such as audio line receivers, ground loop breakers and current sensing. Linearity is suitable for 12-bit ADC measurement.
A classical single amplifier approach ensures that the differential gain is determined by a simple ratio of two internal resistors. A fixed gain of x1 is available.
Single ended input resistance is equalized (10kΩ ±10%) at each input terminal. This feature provides additional common mode rejection when long balanced input cables connect at the input.
A EN pin reduces the quiescent current of the device.
The device is ideal for headphone amplifiers with ground interference rejection, infotainment high drive audio line buffers with ground interference rejection, audio differential-to-single-ended conversion and instrumentation amplifier back-end.
AS1713 Difference Amplifier Block Diagram
