AD8367 Analog Devices, AD8367 Datasheet - Page 10

• Manufacturer Part Number: AD8367
• Description: 500 MHz, Linear-in-dB VGA with AGC Detector
• Manufacturer: Analog Devices

AD8367
Figure 21. AGC RSSI (Voltage on DETO Pin) vs. Input Power at 10 MHz,
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0
0
–60
–60
–60
Figure 23. AGC RSSI (Voltage on DETO Pin) vs. Input Power
Figure 22. AGC RSSI (Voltage on DETO Pin) vs.
–50
–50
–50
Input Power over Temperature at 70 MHz
70MHz
–40°C
for Various Modulation Schemes
10MHz
70 MHz, 140 MHz, and 240 MHz
240MHz
–40
INPUT LEVEL (dBV rms)
–40
INPUT LEVEL (dBV rms)
–40
INPUT LEVEL (dBV rms)
+85°C
140MHz
–30
–30
–30
+25°C
–20
–20
256QAM
–20
WCDMA
64QAM
–10
–10
–10
10MHz
70MHz
140MHz
240MHz
IS95FWD
+25°C
–40°C
+85°C
16QAM
SINE
0
0
0
2.0
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
–2.5
–3.0
2.0
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
–2.5
–3.0
2.5
2.0
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
–2.5
Rev. A | Page 10 of 24
19.0097
0.8
0.7
0.6
0.5
0.4
–2
–6.4
–5
Figure 24. AGC Time Domain Response (3 dB Step)
Figure 26. Gain Intercept Distribution at 70 MHz
Figure 25. Gain Scaling Distribution at 70 MHz
–6.2
19.7297
–1
–6.0
–5
GAIN SCALING (mV/dB)
–5.8
INTERCEPT (dB)
TIME (Seconds)
19.9097
C
–5.6
AGC
0
= 100pF
–5.4
V
V
AGC
OUT
20.0897
–5.2
1
–5
–5.0
20.2697
–4.8
2
–5