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參數(shù)資料
| 型號： | RF2485 |
| 廠商： | RF MICRO DEVICES INC |
| 元件分類： | 衰減器 |
| 英文描述： | VHF QUADRATURE MODULATOR |
| 中文描述： | 200 MHz - 600 MHz RF/MICROWAVE I/Q MODULATOR |
| 封裝： | SOIC-14 |
| 文件頁數(shù)： | 2/8頁 |
| 文件大?。?/td> | 79K |
| 代理商： | RF2485 |
Preliminary
5-56
RF2485
Rev A3 010820
5
M
U
Absolute Maximum Ratings
Parameter
Supply Voltage
Input LO and RF Levels
Operating Ambient Temperature
Storage Temperature
Rating
-0.5 to +7.5
+10
-40 to +85
-40 to +150
Unit
V
DC
dBm
°C
°C
Parameter
Specification
Typ.
Unit
Condition
Min.
Max.
LO Input
Frequency Range
Power Level
Input VSWR
T=25°C, V
DD
=5V
DC
, I&Q inputs=2V
PP
200
-3
600
+6
MHz
dBm
1.2:1
With external 50
termination; see applica-
tion schematic, note A.
Modulation Input
Frequency Range
Reference Voltage (V
REF
)
Modulation (I&Q)
Modulation (I&Q)
Maximum Modulation (I&Q)
Input Resistance
DC Offset
DC
2.0
100
3.0
MHz
V
V
V
V
mV
V
REF
±0.7
V
REF
±1.5
V
REF
±2.5
3000
50
I & Q signals for -0.5dBm output power.
I & Q signals for +5dBm output power.
In-phase and quadrature signals.
150
I
SIG
-I
REF
and Q
SIG
-Q
REF
; to achieve maxi-
mum carrier suppression.
Amplitude Error (I/Q)
Quadrature Phase Error
0.2
±1
dB
°
±3
From 350MHz to 450MHz.
V
DD
=5V, LO Power=0dBm, LO
Freq=400MHz, SSB, I&Q input=0.7V
P
RF Output
Output Power
Output Impedance
Output VSWR
Broadband Noise Floor
Sideband Suppression
Carrier Suppression
-1.5
-0.5
50
1.5:1
-149
43
26
dBm
-147
dBm/Hz
dB
dB
At 5MHz offset
Unadjusted
Modulation DC offset can be externally
adjusted for optimum suppression. Suppres-
sion is typically better than 25dB without
adjustment.
30
20
IM3
TETRA Modulation
Channel Power
-40
-52
dBc
-3.0
-2.5
-2.0
dBm
1.7V
P-P
TETRA Modulation
LO, 450MHz@-5.0dBm, V
REF
2.5V
VCC=5.0V
Adjacent Channel Power
Rejection
dBc
25kHz
50kHz
-47.0
-67.0
-48.0
-68.5
-49.0
-70.0
dBc
dBc
Power Supply
Voltage
5
V
V
Specifications
Operating Limits
Operating
4.5
5.5
39
Current
28
mA
Caution!
ESD sensitive device.
RF Micro Devices believes the furnished information is correct and accurate
at the time of this printing. However, RF Micro Devices reserves the right to
make changes to its products without notice. RF Micro Devices does not
assume responsibility for the use of the described product(s).
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