AD8021 Analog Devices, AD8021 Datasheet - Page 17

• Manufacturer Part Number: AD8021
• Description: Low Noise, High Speed Amplifier for 16-Bit Systems
• Manufacturer: Analog Devices

Specifications of AD8021

• -3db Bandwidth: 490MHz
• Slew Rate: 150V/µs
• Vos: 400µV
• Ib: 7.5µA
• # Opamps Per Pkg: 1
• Input Noise (nv/rthz): 2.1nV/rtHz
• Vcc-vee: 4.5V to 24V
• Isy Per Amplifier: 7.7mA
• Packages: SOIC,SOP

TEST CIRCUITS
50Ω
50Ω
50Ω
50Ω CABLE
50Ω CABLE
55.6Ω
50Ω CABLE
Figure 49. Noninverting Gain and FET Probe
49.9Ω
499Ω
49.9Ω
50Ω
Figure 48. Noninverting Gain
49.9Ω
R
49.9Ω
R
IN
Figure 50. Inverting Gain
IN
499Ω
R
IN
Figure 51. CMRR
499Ω
AD8021
R
R
G
R
G
S
–V
R
ANALYZER
NETWORK
R
–V
S
HP8753D
S
G
S
–V
+V
+V
C
–V
S
C
C
R
C
S
C
499Ω
C
S
7pF
S
R
F
F
C
50Ω
+V
F
5
+V
5
S
5
C
S
C
C
R
PROBE
F
F
R
FET
R
5
O
O
R
R
D
D
49.9Ω
C
L
50Ω CABLE
50Ω CABLE
R
L
Rev. F | Page 17 of 28
1.0V
100Ω
49.9Ω
100Ω
4V
Figure 54. Input-to-Output Isolation, Chip Disabled
499Ω
49.9Ω
R
50Ω
AD8021
Figure 55. Output Impedance, Chip Disabled
Figure 52. Output Impedance, Chip Enabled
G
49.9Ω
49.9Ω
49.9Ω
–V
499Ω
–V
1
AD8021
S
S
8
499Ω
Figure 53. Enable/Disable
7pF
+V
C
7pF
C
R
C
499Ω
C
+V
S
F
8
ANALYZER
1
5
NETWORK
5
S
HP8753D
LOGIC REF
499Ω
DISABLE
–V
8
1
+V
S
LOGIC REF
499Ω
50Ω
DISABLE
–V
S
7pF
C
AD8021
S
C
AD8021
+V
C
7pF
5
50Ω
S
C
50Ω
5
ANALYZER
NETWORK
ANALYZER
HP8753D
NETWORK
FET
PROBE
HP8753D
50Ω CABLE
1kΩ
976Ω
AD8021
53.6Ω