Compatible with AD7524, 8-bit CMOS digital-to-analog converter GX7524 applied to precision AGC circuit

The purpose of the AGC circuit is to enable the receiver‘s gain to be automatically adjusted in accordance with the strength of the input signal, so that the amplitude of the useful signal after the AGC is maintained at a constant level or varies within a specific range.The AGC ensures that the receiver‘s gain rises when a weak signal is received and lowers when a strong signal is received so that the output signal is maintained at an appropriate level and is not saturated or blocked by an input signal that is too small. Decrease, so that the output signal is maintained at the appropriate level, not because the input signal is too small to work properly, and not because the input signal is too large to make the receiver saturation or blocking.

In a precision AGC circuit, a digital-to-analog converter is used to automatically adjust the gain of the amplifier based on the amplitude of the input signal. It is necessary to select a digital-to-analog converter with high accuracy, high resolution, and fast conversion speed. the high accuracy and high resolution of the GXSC 8-bit CMOS digital-to-analog converter, GX7524, ensures accuracy and finesse in gain control, and the fast conversion speed enables the AGC circuit to respond to changes in the input signal in a timely manner.

The GX7524 is an 8-bit digital-to-analog converter with an input latch whose load cycle is similar to the "write" cycle of a random access memory. Utilizing an advanced CMOS thin-film manufacturing process, the chip offers 1/8 LSB accuracy with power consumption of less than 10 mW. The chip‘s new and improved design eliminates the need for the Schottky protection diode previously required and guarantees TTL level compatibility at +5V supply. The loading speed has been increased for compatibility with most microprocessors.

Powered by a +5V to +15V supply, the GX7524 can be connected directly to most microprocessor buses or output ports. The excellent multiplication characteristics make the GX7524 ideal for many microprocessor gain setting and signal control applications. Key features of the chip are as follows: 

- Microprocessor compatible (6800, 8085, Z80, etc.) 

- TTL/CMOS input level compatible 

- On-chip data latch 

- Endpoint linearity 

- Low power consumption - Monotonicity guaranteed (full temperature range) 

- Latchless (no Schottky diode protection required)