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參數(shù)資料
| 型號： | AD6458 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | GSM 3 V Receiver IF Subsystem(用于數(shù)字通的IF信號收發(fā)子系統(tǒng)) |
| 中文描述： | 3伏的GSM接收機(jī)中頻子系統(tǒng)（用于數(shù)字通的中頻信號收發(fā)子系統(tǒng)） |
| 文件頁數(shù)： | 6/12頁 |
| 文件大?。?/td> | 238K |
| 代理商： | AD6458 |
AD6458
–6–
REV. 0
RF FREQUENCY – MHz
22
12
6
80
120
N
160
200
240
280
320
360
400
440
20
14
10
8
18
16
F
IF
= 13MHz, Z
S
= 50
F
IF
= 26MHz, Z
S
= 50
F
IF
= 13MHz, Z
S
= 400
Figure 5. Mixer Noise Figure vs. RF Frequency
NOISE FIGURE – dB
P
35
0
7.0
8.4
7.2
7.4
7.6
7.8
8.0
8.2
30
20
15
10
5
25
= 7.7dB
= 0.26dB
Figure 6. Mixer Noise Figure Histogram, R
S
= 1 k
,
F
RF
= 83 MHz, F
IF
= 13 MHz
RF FREQUENCY – MHz
R
2.0
1.6
0
50
550
100
150
200
250
300
350
400
450
500
1.2
0.8
0.4
5.5
C
5.0
3.0
4.5
4.0
3.5
C
SH
, V
GAIN
= 0.2V
R
SH
, V
GAIN
= 2.2V
C
SH
, V
GAIN
= 1.0V
R
SH
, V
GAIN
= 1.0V
SH
, V
GAIN
= 2.2V
R
SH
, V
GAIN
= 0.2V
Figure 7. Mixer Input Impedance vs. RF Frequency,
V
POS
= 3.0 V, T
A
= +25
°
C
RF FREQUENCY – MHz
C
15
0
–15
50
550
100
150
200
250
300
350
400
450
500
10
5
–5
–10
V
GAIN
= 0.2V
V
GAIN
= 1.2V
V
GAIN
= 2.2V
Figure 8. Mixer Conversion Gain vs. RF Frequency,
T
A
= +25
°
C, V
POS
= 3.0 V, V
REF
=1.2 V, F
IF
=13 MHz
G
IF FREQUENCY – MHz
12
–2
–10
10
54
14
18
22
26
30
34
38
42
46
50
10
0
–4
–6
8
4
6
2
–8
V
GAIN
= 0.2V
V
GAIN
= 1.5V
V
GAIN
= 2.2V
Figure 9. Mixer Conversion Gain vs. IF Frequency,
T
A
= +25
°
C, V
POS
= 3 V, V
REF
= 1.2 V, F
RF
= 250 MHz
V
GAIN
– Volts
G
15
10
–15
0
2.5
0.5
1.0
1.5
2.0
5
0
–5
–10
V
POS
= 3V TO 3.6V
T
A
= –25
°
C TO +85
°
C
Figure 10. Mixer Conversion Gain vs V
GAIN
, V
REF
= 1.2 V,
F
IF
=13 MHz, F
RF
= 83 MHz
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