Datasheet

AD834 Data Sheet
Rev. F | Page 8 of 20
TEST CIRCUITS
00894-007
A B
SUBTRACT
CH1 – CH2
1024 POINT
FFT
LOW-PASS
FILTER
HP3362A
SIGNAL GENERATOR
WAVETEK 2500A
SIGNAL GENERATOR
DATA PRECISION 8200
VOLTAGE CALIBRATOR
AD834
X W1
Y W2
A/B
SWITCH
HP54121A
SAMPLING
HEADS
CH1
CH2
HP54120A
DIGITIZING
MAINFRAME
HP330
COMPUTER
Figure 7. Test Configuration for Measuring AC Feedthrough
and Total Harmonic Distortion
00894-008
DENOTES A SHORT DIRECT CONNECTION TO THE GROUND PLANE
C3
560pF
R1
49.9Ω
R2
49.9Ω
C5
0.1µF
C4
560pF
C6
0.1µF
C2
0.1µF
X2
8 7 6 5
1 2 3 4
X1 +V
S
W1
Y1 Y2
–V
S
W2
AD834
TO
HP3456A
DVM
+5V
–5V
C1
0.1µF
R4
75Ω
R3
10Ω
L1
1µH
SMA FROM
HP8656A
SIGNAL
GENERATOR
SMA TO
HP436A
POWER
METER
Figure 8. Bandwidth Test Circuit