Datasheet

AD8264
Rev. A | Page 20 of 40
TEST CIRCUITS
V
S
= ±2.5 V, T
A
= 25°C, f = 10 MHz, C
L
= 5 pF, R
L
= 500 Ω per output (VGAx, VOHx, VOLx), V
GAIN
= (V
GNHx
− V
GNLO
) = 0 V,
V
VOCM
= GND, V
OFSx
= GND, gain range = 6 dB to 30 dB, unless otherwise specified.
50Ω
PrA
6dB
+
–
6dB
+
–
IPPx
IPNx
GNHx
VOLx
VOHx
OFSxVOCM
VGAx
AD8264
OVEN
GNLO
DC
METER
500Ω
500Ω
500Ω
V
GAIN
DC
METER
07736-119
Figure 71. Gain vs. V
GAIN
vs. Temperature (See Figure 3 and Figure 4)
PrA
6dB
+
–
6dB
+
–
IPPx
IPNx
GNHx
VOLx
VOHx
OFSxVOCM
VGAx
AD8264
GNLO
50Ω
DIFFERENTIAL
PROBE
DIFFERENTIAL
PROBE
V
GAIN
CH1 CH2
50Ω 50Ω
50Ω
500Ω
OUT
SIGNAL
GENERATOR
OSCILLOSCOPE
07736-100
Figure 72. Gain Error vs. V
GAIN
at Various Frequencies to VGAx (See Figure 5)
PrA
6dB
+
–
6dB
+
–
VOCM
AD8264
GNLO
50Ω
DIFFERENTIAL
PROBE
V
GAIN
CH1 CH2
50Ω 50Ω
500Ω
NETWORK ANALYZER
07736-072
IPPx
IPNx
GNHx
VOLx
VOHx
OFSx
VGAx
Figure 73. Frequency Response vs. Gain to VGAx for Various Values of V
GAIN
,
V
GAIN
= GNHx – GNLO (See Figure 10)
PrA
6dB
+
–
6dB
+
–
IPPx
IPNx
GNHx
VOLx
VOHx
OFSxVOCM
VGAx
AD8264
GNLO
50Ω
DIFFERENTIAL
PROBE
V
GAIN
CH1 CH2
50Ω 50Ω
NETWORK ANALYZER
500Ω
500Ω
07736-101
Figure 74. Frequency Response vs. Gain to Differential Output for Various
Values of V
GAIN
(See Figure 11)
PrA
6dB
+
–
6dB
+
–
IPPx
IPNx
GNHx
VOLx
VOHx
OFSxVOCM
VGAx
AD8264
GNLO
50Ω
DIFFERENTIAL
PROBE
CH1 CH2
50Ω 50Ω
500Ω
500Ω
NETWORK ANALYZER
C
L
C
L
07736-102
Figure 75. Frequency Response to Differential Output for
Various Capacitive Loads (See Figure 12)