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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)： | 5/12頁(yè) |
| 文件大?。?/td> | 314K |
| 代理商： | AD6459 |
AD6459
–5–
REV. 0
RF FREQUENCY – dB
20
6
50
450
100
S
150
200
250
300
350
400
18
14
12
10
8
16
R
IN
= 50
, IF = 13MHz
R
IN
= 50
, IF = 26MHz
R
IN
= 1k
, IF = 13MHz
R
IN
= 50
, F = 45MHz
R
IN
= 400
, IF = 13MHz
Figure 3. Mixer Noise Figure vs. RF Frequency
RF FREQUENCY – MHz
R
2000
800
0
50
550
100
150
200
250
300
350
400
450
500
1800
1000
600
200
1400
1200
400
1600
R SHUNT
V
GAIN
= 2.2V
C SHUNT
V
GAIN
= 0.2V
C SHUNT
V
GAIN
= 1.0V
R SHUNT
V
GAIN
= 0.2V
C SHUNT
V
GAIN
= 2.2V
5.0
4.8
4.6
4.4
4.2
4.0
3.8
3.6
3.4
3.2
3.0
C
Figure 4. Mixer Input Impedance vs. RF Frequency,
V
POS
= 2.7 V, T
A
= +25
°
C
RF FREQUENCY – MHz
20
–10
50
450
100
G
150
200
250
300
350
400
15
10
5
0
–5
V
GAIN
= 0.2V
V
GAIN
= 1.0V
V
GAIN
= 2.25V
Figure 5. Mixer Conversion Gain vs. RF Frequency,
T
A
= +25
°
C, V
POS
= 2.7 V, V
REF
= 1.2 V, F
IF
= 26 MHz
RF FREQUENCY – MHz
20
–10
6
38
10
G
14
18
22
26
30
34
15
10
5
0
–5
V
GAIN
= 0.2V
V
GAIN
= 1.0V
V
GAIN
= 2.25V
42
46
Figure 6. Mixer Conversion Gain vs. IF Frequency,
T
A
= +25
°
C, V
POS
= 2.7 V, V
REF
= 1.2 V, FRF = 250 MHz
TEMPERATURE –
°
C
70
30
0
–50
90
–40
G
–20 –10
0
10
20
30
40
50
60
70 80
60
50
20
10
40
–30
AMP/DEMOD, V
POS
= 2.7V
AMP/DEMOD, V
POS
= 5.5V
MIXER, V
POS
= 2.7V
MIXER, V
POS
= 5.5V
Figure 7. Mixer Conversion Gain and IF Amplifier/
Demodulator Gain vs. Temperature, V
GAIN
= 0.2 V,
V
REF
= 1.2 V , F
IF
= 26 MHz, F
RF
= 250 MHz
GAIN VOLTAGE – Volts
–9
–10
–15
0
2.5
0.5
I
1
1.5
2
–11
–12
–13
–14
V
POS
= 5.5V
T
A
= +85
°
C
V
POS
= 5.5V
T
A
= +25
°
C
V
POS
= 2.7V
T
A
= +25
°
C
V
POS
= 2.7V
T
A
= –25
°
C
V
POS
= 5.5V
T
A
= –45
°
C
Figure 8. Mixer Input 1 dB Compression Point vs.
V
GAIN
, V
REF
= 1.2 V, F
RF
= 250 MHz, F
IF
= 26 MHz
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