Basic connection circuit of HA-5340 in the same phase unity gain mode

As shown in the figure, the basic connection circuit of the HA-5340 in the same phase unit gain mode has a very high throughput rate. As a fast data acquisition A/D conversion input stage, the input signal VIN is added to the 2nd pin of the HA-5340, and after sampling and holding amplification, it is sent to the HI774 for analog-to-digital conversion, and then converted into a 12-bit accurate digital signal for output. The S/H signal controls the internal switch to be turned on or off, that is, the sampling or holding state. The circuit has a built-in 135pF holding capacitor. If you need to extend the holding time, add a holding capacitor CH between pins 7 and 11. CH uses a high insulation and low dielectric absorption capacitor. The 50kΩ potentiometer is an "offset voltage" adjustment potentiometer. Adjusting the potentiometer can adjust the holding stage error to zero. The HA-5340 output has no short-circuit protection circuit, so it maintains a low output impedance in the high-frequency state. A 0.01~0.1μF ceramic capacitor must be connected between each power supply terminal of the HA-5340 and the system power ground (pin 13) for bypass decoupling.