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參數(shù)資料
| 型號(hào)： | AD6459 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | GSM 3 V Receiver IF Subsystem |
| 中文描述： | 3伏的GSM接收機(jī)中頻子系統(tǒng) |
| 文件頁(yè)數(shù)： | 6/12頁(yè) |
| 文件大小： | 314K |
| 代理商： | AD6459 |
AD6459
–6–
REV. 0
INTERMEDIATE FREQUENCY – dB
70
05
45
10
15
20
25
30
35
40
60
40
30
20
10
50
V
GAIN
= 0.2V
V
GAIN
= 1.0V
V
GAIN
= 1.5V
V
GAIN
= 2.25V
I
Figure 9. IF Amplifier and Demodulator Gain vs.
Frequency, T
A
= +25
°
C, V
POS
= 2.7 V, V
REF
= 1.2 V
IF FREQUENCY – MHz
12000
6000
0
0
100
10
R
20
30
40
50
60
70
80
90
10000
8000
4000
2000
R SHUNT, V
GAIN
= 2.2V
C SHUNT, VGAIN= 1.0V
R SHUNT, V
GAIN
= 1.0V
R SHUNT, V
GAINS
= 0.2V
C SHUNT, V
GAIN
= 2.2V
C SHUNT, V
GAIN
= 0.2V
3.5
3.0
2.5
2.0
1.5
1.0
0.5
C
Figure 10. IF Amplifier Input Impedance vs.
Frequency, T
A
= +25
°
C, V
POS
= 2.7 V, V
REF
= 1.2 V
GAIN VOLTAGE – Volts
I
R
–5
–10
–55
0
2.5
0.5
1
1.5
2
–25
–40
–45
–50
–15
–20
–35
–30
Figure 11. IF Amplifier/Demodulator Input 1 dB
Compression Point vs. V
GAIN
, F
IF
= 19.5 MHz,
V
REF
= 1.2 V, T
A
= +25
°
C, V
POS
= 2.7 V
GAIN VOLTAGE – Volts
1
0.8
0
0
2.5
0.5
1
1.5
2
0.2
–0.6
–0.8
–1.0
0.6
0.4
–0.4
–0.2
MIXER
E
IF AMP/DEMOD
Figure 12. AD6459 Gain Error vs. Gain Control
Voltage, Representative Part
FREF FREQUENCY – MHz
Q
3.0
05
45
10
15
20
25
30
35
40
2.5
2.0
1.5
1.0
0.5
Figure 13. Demodulator Quadrature Error vs.
F
REF
Frequency, T
A
= +25
°
C, V
POS
= 2.7 V
CARRIER FREQUENCY – kHz
P
–90
–95
–120
0.1
10k
1
10
100
1k
–100
–105
–110
–115
Figure 14. PLL Phase Noise vs. Frequency,
V
POS
= 3 V, C10 = 1 nF, F
REF
= 13 MHz
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