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