AD8306 Analog Devices, AD8306 Datasheet - Page 4

• Manufacturer Part Number: AD8306
• Description: 5 - 400 Mhz, 100 DB High Precision Limiting - Logarithmic Amplifier
• Manufacturer: Analog Devices

AD8306
Figure 2. Additional Supply Current and Limiter Output
Current vs. R
Figure 1. Supply Current vs. Enable Voltage @
T
Figure 3. Large Signal RSSI Pulse Response with
C
A
L
0.00001
0.0001
= –40 C, +25 C and +85 C
= 100 pF and R
0.001
0.01
100
0.1
14
12
10
10
8
6
4
2
0
1
0.5
0
–Typical Performance Characteristics
LIMITER OUTPUT
100ns PER HORIZONTAL DIVISION
CURRENT
0.7
LIM
50
500mV PER
T
VERTICAL
A
DIVISION
= +85 C
T
0.9
A
100
= +25 C
L
ADDITIONAL SUPPLY CURRENT
1.1
= 50
150
ENABLE VOLTAGE – V
1.3
200
R
and 75
LIM
1.5
–
250
1.7
GROUND REFERENCE
INPUT
2V PER
VERTICAL
DIVISION
300
1.9
(Curves Overlap)
T
VLOG
A
= –40 C
350
2.1
400
2.3
2.5
450
–4–
Figure 5. Large Signal RSSI Pulse Response with R
and C
Figure 6. Small Signal AC Response of RSSI Output with
External Filter Capacitance of 27 pF, 270 pF and 3300 pF
Figure 4. RSSI Pulse Response for Inputs Stepped from
Zero to –83 dBV, –63 dBV, –43 dBV, –23 dBV, –3 dBV
L
= 33 pF, 100 pF and 330 pF (Overlapping Curves)
100 s PER HORIZONTAL DIVISION
100ns PER HORIZONTAL DIVISION
100ns PER HORIZONTAL DIVISION
SHOWN IS –3dBV
500mV PER
INPUT LEVEL
VERTICAL
DIVISION
500mV PER
VERTICAL
DIVISION
200mV PER
VERTICAL
DIVISION
27pF
3300pF
270pF
GROUND REFERENCE
2V PER
VERTICAL
DIVISION
GROUND REFERENCE
INPUT
GROUND REFERENCE
1V PER
VERTICAL
DIVISION
INPUT
VLOG
VLOG
VLOG
L
= 100
REV. A