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參數(shù)資料
| 型號： | AD6121 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | CDMA 3 V Receiver IF Subsystem with Integrated Voltage Regulator |
| 中文描述： | CDMA的3 V接收機(jī)中頻子系統(tǒng)集成穩(wěn)壓器 |
| 文件頁數(shù)： | 6/16頁 |
| 文件大小： | 258K |
| 代理商： | AD6121 |
AD6121
–6–
REV. B
NOISE
SOURCE
TO NOISE
FIGURE
METER
1:8
10nF
1k
450
205
4:1
CDMAIPP
CDMAIPN
IFOPP
INDUCTOR CHOSEN FOR PEAK RESPONSE
AT THE TEST FREQUENCY
IFOPN
AD6121
10nF
10nF
10nF
450
REACTIVE
CONJUGATE
MATCH
Figure 4. IF Amplifier Noise Figure Test Set
HP8116A
FUNCTION GEN
4kHz, 0.5V TO 2.5V
SQ WAVE
ROHDE & SCHWARZ
SMT03
80MHz,
–
50dBm
VGAIN
CDMA IN
IF OUT
TEKTRONIX
TDS 744A
CH 1
WITH 10 PROBE
CH 2
WITH COAX CABLE
50
AD6121
CHARACTERIZATION
BOARD
a. Response Time From Gain Control to IF Output
HP8116A
FUNCTION GEN
4kHz, 0V TO 2.7V
SQ WAVE
ROHDE & SCHWARZ
SMT03
80MHz,
–
50dBm
CDMA IN
IF OUT
TEKTRONIX
TDS 744A
CH 1
WITH 10 PROBE
CH 2
WITH COAX CABLE
50
AD6121
CHARACTERIZATION
BOARD
PD1, PD2
b. Response Time From PD1 and PD2 Control to IF Output
Figure 5. Response Time Setup
VGAIN
–
Volts
60.00
40.00
0.5
2.5
1
G
–
1.5
2
0.00
–
20.00
–
40.00
–
60.00
20.00
T
A
= +85 C
T
A
=
–
40 C
T
A
= +25 C
Figure 6. IF Amplifier’s Gain vs. VGAIN, IF = 70 MHz,
T
A
= –40
°
C, +25
°
C and +85
°
C
VGAIN
–
Volts
60.00
40.00
0.5
2.5
1
G
–
1.5
2
0.00
–
20.00
–
40.00
–
60.00
20.00
T
A
= +85 C
T
A
=
–
40 C
T
A
= +25 C
Figure 7. IF Amplifier’s Gain vs. VGAIN, IF = 85 MHz,
T
A
= –40
°
C, +25
°
C and +85
°
C
Typical Performance Characteristics
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