PA162(2008) 查看數據表（PDF） - Cirrus Logic

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PA162
(Rev.:2008)

Power Operational Amplifiers

Cirrus Logic 

PA162

Product Innova tionFrom

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TYPICAL APPLICATION

R1 and R2 set up Amplifier A as non-inverting. Ampli-

fier B is set up as a unity gain inverter driven from the

output of Amplifier A. Note that Amplifier B inverts the

signals about the reference node, which is set at mid-

supply by R5 and R6. When the command input is

midrange, so is the output of Amplifier A. Since this is

also equivalent to the reference node voltage, the out-

put of Amplifier B is the same resulting in 0V across

the motor. Inputs more positive than 5V result in motor

current flow from left to right (see Figure 3). Inputs less

than 5V drive the motor in the opposite direction.

R2

R1

_

A

1/4 PA162

M

INPUT

0-10V

+

R3

R4

_

B

1/4 PA162

+

+28V

R5

R6

FIGURE 3. Bi-directional speed control from a single

supply.



PA162U

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