Datasheet

AD8260
Rev. A | Page 18 of 32
VMDO
0.1µF
100Ω
+
–
100Ω
PREAMP
IN
NETWORK ANALYZER
0.1µF
453Ω
0.1µF
453Ω
50Ω
50
Ω
07192-159
AD8260—VGA/PREAMPLIFIER
Figure 59. Test Circuit for Frequency Response and Group Delay of the VGA/Preamplifier
+3.3V
–3.3V
0.1µF
100Ω
+
–
100Ω
PREAMP
IN
NETWORK ANALYZER
WITH S-PARAMETER
CAPABILITY
50Ω
07192-160
AD8260—VGA/
PREAMPLIFIER
Figure 60. Test Circuit for Output Resistance of the VGA/Preamplifier
0.1µF
1kΩ
1kΩ
100Ω
100Ω
VMDO
VMDO
SPECTRUM
ANALYZER
50Ω
+
–
PREAMP
VGA
0.1µF
0.1µF
0.1µF
AD8129
×10
07192-051
AD8260—VGA/PREAMPLIFIER
Figure 61. Test Circuit for Input-Referred and Output-Referred Noise Measurements of the VGA/Preamplifier