Datasheet > AD8236ARMZ-RL1

AD8236ARMZ-RL1

更新时间： 2022-05-24 12:28:28

品牌	Logo	应用领域
亚德诺 - ADI		仪表放大器
页数	文件大小	规格书
20页	514K
描述
40 Î¼A Micropower Instrumentation Amplifier with Zero Crossover Distortion

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AD8236ARMZ-RL1 数据手册

AD8236

APPLICATIONS INFORMATION

AC-COUPLED INSTRUMENTATION AMPLIFIER

An integrator can be tied to the AD8236 in feedback to create a

high-pass filter as shown in Figure 41. This circuit can be used

to reject dc voltages and offsets. At low frequencies, the impedance

of the capacitor, C, is high. Therefore, the gain of the integrator

is high. DC voltage at the output of the AD8236 is inverted and

gained by the integrator. The inverted signal is injected back into

the REF pin, nulling the output. In contrast, at high frequencies,

the integrator has low gain because the impedance of C is low.

Voltage changes at high frequencies are inverted but at a low

gain. The signal is injected into the REF pins, but it is not enough to

null the output. At very high frequencies, the capacitor appears as

a short. The op amp is at unity gain. High frequency signals are,

therefore, allowed to pass.

0.1µF

+IN

f_HIGH-PASS

2πRC

AD8236

REF

–IN

0.1µF

AD8603

When a signal exceeds f_HIGH-PASS, the AD8236 outputs the high-

pass filtered input signal.

REF

10µF

Figure 41. AC-Coupled Circuit

Rev. 0 | Page 18 of 20

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