AD736JRZ-R7 datasheet(8/8 Pages) AD

8 / 8 page

AD736

REV. C

–8–

The input coupling capacitor, CC, in conjunction with the 8 kΩ

internal input scaling resistor, determine the –3 dB low fre-

quency rolloff. This frequency, FL, is equal to:

L =

π(8,000)(TheValue of C

C in Farads )

Note that at FL, the amplitude error will be approximately

–30% (–3 dB) of reading. To reduce this error to 0.5% of read-

ing, choose a value of CC that sets FL at one tenth the lowest

frequency to be measured.

In addition, if the input voltage has more than 100 mV of dc

offset, than the ac coupling network shown in Figure 21 should

be used in addition to capacitor CC.

Applications Circuits

Figure 19. AD736 with a High Impedance Input Attenuator

Figure 20. Differential Input Connection

Figure 21. External Output VOS Adjustment

Figure 22. Battery Powered Option

Figure 23. Low Z, AC Coupled Input Connection

OUTLINE DIMENSIONS

Dimensions shown in inches and (mm).

AD736JRZ-R7 数据表(PDF) 8 Page - Analog Devices