AD8309 datasheet(4/20 Pages) AD

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REV. B

ENABLE VOLTAGE – V

100

0.00001

0.5

2.5

0.7

0.9

1.1

1.3

1.5

1.7

1.9

2.1

2.3

0.1

0.01

0.001

0.0001

+25 C

+85 C

–40 C

Figure 1. Supply Current vs. Enable Voltage @

TA = –40°C, +25°C and +85°C

VLOG

500mV PER

VERTICAL

DIVISION

500ns PER HORIZONTAL

DIVISION

GROUND REFERENCE

5V PER

VERTICAL

DIVISION

ENBL

–13dBV

–33dBV

–53dBV

–73dBV

–93dBV

Figure 2. Power On/Off Response Time with RF Input of

–93 dBV to –13 dBV

VLOG

INPUT

500mV PER

VERTICAL DIVISION

200ns PER HORIZONTAL

DIVISION

GROUND REFERENCE

500mV PER

VERTICAL DIVISION

Figure 3. Large Signal RSSI Pulse Response with

CL = 100 pF and RL = 50 Ω and 75 Ω (Curves Overlap)

AD8309–Typical Performance Characteristics

–4–

GROUND REFERENCE

100ns PER HORIZONTAL

DIVISION

500mV PER

VERTICAL DIVISION

+10dBm INPUT

LEVEL SHOWN

HERE

VLOG

500mV PER

VERTICAL

DIVISION

Figure 4. RSSI Pulse Response for Inputs Stepped from

Zero to –63 dBV, –43 dBV, –23 dBV, –3 dBV

GROUND REFERENCE

VLOG

INPUT

500mV PER

VERTICAL

DIVISION

100ns PER HORIZONTAL

DIVISION

1V PER VERTICAL

DIVISION

Figure 5. Large Signal RSSI Pulse Response with RL = 100 Ω

and CL = 33 pF, 100 pF and 330 pF (Curves Overlap)

200mV PER

VERTICAL DIVISION

100 s PER

HORIZONTAL

DIVISION

27pF

3300pF

GROUND REFERENCE

270pF

VLOG

Figure 6. Small Signal AC Response of RSSI Output with

External Filter Capacitance of 27 pF, 270 pF and 3300 pF

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