RF AMP/DEMOD AND BASEBAND OUTPUT AMPLIFIERS
75
65
55
VS = 2.7V,
45 TA = +85؇C
VS = 2.7V, TA = –40؇C
VS = 5V, TA = –40؇C
VS = 2.7V, TA = +25؇C
VS = 5V, TA = +25؇C
35
VS = 5V, TA = +85؇C
25
15
5
–5
0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2
VGIN – V
TPC 22. Voltage Gain vs. VVGIN, FLO = 1900 MHz,
FBB = 1 MHz
AD8347
1.0
0.8
0.6
0.4
0.2
0
–0.2
TA = +85؇C
TA = +25؇C
–0.4
TA = –40؇C
–0.6
–0.8
–1.0
0
5
10
15
20
25
30
35
40
BASEBAND FREQUENCY – MHz
TPC 25. I/Q Amplitude Imbalance vs. FBB,
Temperature = 25؇C, VS = 5 V
2.5
2.0
1.5
1.0
0.5
VS = 5V, TA = +25؇C
0
–0.5
–1.0
–1.5 VS = 5V, TA = +85؇C
–2.0
VS = 5V, TA = –40؇C
–2.5
800 1000 1200 1400 1600 1800 2000 2200 2400 2600
RF FREQUENCY – MHz
TPC 23. Quadrature Phase Error vs. FLO, VVGIN = 0.7 V,
VS = 5 V
0
–2
–4
–6
RF WITH TERMINATION
–8
–10
RF WITHOUT TERMINATION
–12
800 1000 1200 1400 1600 1800 2000 2200 2400 2600
RF FREQUENCY – MHz
TPC 26. Return Loss of RFIP vs. FRF, VVGIN = 0.7 V, VS = 5 V
2.5
2.0
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
TA = +85؇C
TA = –40؇C
TA = +25؇C
–2.0
–2.5
0
5
10
15
20
25
30
35
40
BASEBAND FREQUENCY – MHz
TPC 24. Quadrature Phase Error vs. FBB, VVGIN = 0.7 V,
VS = 5 V
2.7GHz
WITH TERMINATION
800MHz
2.7GHz
800MHz
WITHOUT TERMINATION
TPC 27. S11 of RFIN vs. FRF, VVGIN = 0.7 V, VS = 5 V
REV. 0
–11–