AD640 Analog Devices, AD640 Datasheet - Page 6

• Manufacturer Part Number: AD640
• Description: DC-Coupled Demodulating 120 MHz Logarithmic Amplifier
• Manufacturer: Analog Devices

AD640
Figure 10. AC Response at 30 MHz, 60 MHz, 90 MHz and
120 MHz, vs. dBm Input (Sinusoidal Input)
Figure 12. Baseband Pulse Response of Single AD640,
Inputs of 1 mV, 10 mV and 100 mV
Figure 11. Slope Current, I
–2.5
–2.0
–1.5
–1.0
–0.5
0.95
0.90
0.85
0.80
0.5
1.0
0
–50
DC
–Typical AC Performance Characteristics
–40
30
INPUT LEVEL – dBm
FREQUENCY – MHz
–30
60
AD640
TEMPERATURE = +25 C
Y
, vs. Input Frequency
–20
90
V
S
= 5 VOLTS
–10
120
150
0
120MHz
30MHz
60MHz
90MHz
–6–
Figure 13. Logarithmic Response and Linearity at 60 MHz,
T
A
Figure 15. Baseband Pulse Response of Cascaded
AD640s, Inputs of 0.2 mV, 2 mV, 20 mV and 200 mV
for T
Figure 14. Intercept Level (dBm) vs. Frequency
(Cascaded AD640s – Sinusoidal Input)
–2.5
–2.0
–1.5
–1.0
0.5
90
89
88
87
86
85
84
83
82
81
80
–5
A
0
–50
0
= –55 C, +25 C, +125 C
+125 C
–55 C
–55 C
10
100
90
0%
10
+125 C
20
–40
+25 C
30
20mV
5µs
INPUT FREQUENCY – MHz
40
INPUT LEVEL – dBm
–30
50
FREQUENCY = 60MHz
60
AD640
70
–20
80
20mV
5µs
90
–10
+125 C
100 110
+25 C
–55 C
+125 C
–55 C
120
0
REV. C
+1
0
–1
–2
+25 C