RF2938 데이터 시트보기 (PDF) - RF Micro Devices
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RF2938 Datasheet PDF : 20 Pages
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RF2938
Parameter
Data Amplifiers
Bandwidth
Gain (Limiting mode)
Rise and Fall Time
Logic High Output
Logic Low Output
Hysteresis
Transmit Modulator and
LPF
Filter Gain
Baseband Filter 3dB Bandwidth
Passband Ripple
Group Delay
Specification
Min.
Typ.
Max.
40
60
2
5
VCC - 0.3 V
VCC
0.3
30
0
1
35
0.1
15
Group Delay
Ultimate Rejection
Input Impedance
Input AC Voltage
Input DC Offset Requirement
IF Frequency Range
Output Impedance
I/Q Phase Balance
I/Q Gain Balance
Conversion Voltage Gain
400
> 80
3
200
1.6
1.7
1.8
45
500
2
±2
±5
0.5 ± 0.25
1.0
1.1
Output P1dB
-6
Carrier Output
-30
Harmonic Outputs
Transmit VGA and
Upconverter
VGA Gain Range
VGA Input Voltage Range
VGA Gain Sensitivity
VGA Input Impedance
RF Mixer Output Impedance
VGA/Mixer Conversion Gain
VGA/Mixer Output Power
-30
17
1.0 to 2.0
17
230-j400
75 - j350
50
+10 to +27
-9
VGA/Mixer Output Power
-4
Unit
Condition
MHz
dB
ns
V
V
mV
Open Loop.
5pF load.
Source Current 1mA
Sink Current 1mA.
dB
MHz
dB
ns
ns
dB
kΩ
mVp-p
V
MHz
kΩ
dB
V/V
dBm
dBm
dBc
Any setting
5th order Bessel LPF, Set by BW CTRL
At 35MHz, increasing as bandwidth
decreases.
At 2MHz.
Single ended
Linear, Single ended.
For correct operation.
Open Collector when TX on, hi-Z when off
With Current Combination into 50Ω single-
ended load
With Current Combination into 50Ω single-
ended load
Without external offset adjustments.
280 MHz
dB
V
dB/V
Ω
Ω
Ω
dB
dBm
dBm
Positive Slope
280 MHz
374 MHz
With matching elements.
With 50Ω match on the output.
1dB compression - Single Side Band,
TX GC=1.0V
1dB compression - Single Side Band,
TX GC=2.0V
11
Rev A8 010418
2-3
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