CBMLM321AST5 datasheet(8/15 Pages) COREBAI

Part #	CBMLM321AST5

Description	OPERATION INSTRUCTION

PDF	15 Pages

Scroll/Zoom	100%

Manufacturer	COREBAI [COREBAI Microelectronics (Beijing) Co., Ltd.]

Direct Link	http://www.corebai.com/en/

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CBMLM321-CBMLM358-CBMLM324

OPERATION INSTRUCTION

Figure 2. Indirectly Driving a Capacitive Load Using Isolation Resistor

The bigger the RISO resistor value, the more stable VOUT will be. However, if there is a resistive

load RL in parallel with the capacitive load, a voltage divider (proportional to RISO/RL) is formed,

this will result in a gain error.

The circuit in Figure 3 is an improvement to the one in Figure 2. RF provides the DC accuracy

by feed-forward the VIN to RL. CF and RISO serve to counteract the loss of phase margin by feeding

the high frequency component of the output signal back to the amplifier’s inverting input,

thereby preserving the phase margin in the overall feedback loop. Capacitive drive can be

increased by increasing the value of CF. This in turn will slow down the pulse response.

Figure 3. Indirectly Driving a Capacitive Load with DC Accuracy

CBMLM321AST5 Datasheet(PDF) 8 Page - COREBAI Microelectronics (Beijing) Co., Ltd.