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參數(shù)資料
| 型號： | RF2948B |
| 廠商： | RF MICRO DEVICES INC |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | 2.4GHz SPREAD-SPECTRUM TRANSCEIVER |
| 中文描述： | TELECOM, CELLULAR, RF AND BASEBAND CIRCUIT, QCC32 |
| 封裝： | 5 X 5 MM, QFN-32 |
| 文件頁數(shù)： | 3/18頁 |
| 文件大?。?/td> | 413K |
| 代理商： | RF2948B |
11-241
RF2948B
Rev A6 040930
NOTFORNEWDESGNS
Parameter
Specification
Typ.
Unit
Condition
Min.
Max.
Transmit Modulator and
LPF
Filter Gain
Baseband Filter 3dB Bandwidth
Passband Ripple
Group Delay
0
dB
MHz
dB
ns
Any setting
5th order Bessel LPF, Set by BW CTRL
1
35
0.1
15
At 35MHz, increasing as bandwidth
decreases.
At 2MHz.
Group Delay
Ultimate Rejection
Input Impedance
Input AC Voltage
Input P1dB
Input DC Offset Requirement
IF Frequency Range
Differential Output Resistance
400
>80
ns
dB
k
3
Single-ended
Linear, Single-ended.
Single-ended.
For correct operation.
100
mV
p-p
mV
p-p
V
MHz
k
200
1.6
45
1.7
1.8
500
22
Between output pins. Open collector when
TX on, Hi Z when TX off
Between output pins.
From each pin to ground.
Differential Output Capacitance
Shunt Output Capacitance
I/Q Phase Balance
I/Q Gain Balance
Conversion Transconductance
0.436
0.4
0
0
0.0185
pF
pF
±3
±1
dB
Single-ended voltage input to differential out-
put current conversion gain.
Without external offset adjustments.
374MHz. Compared to modulated signal,
100mV
P-P
input.
Carrier Output
-18
-26
dBc
Harmonic Outputs
Transmit VGA and
Upconverter
VGA Gain Range
VGA Control Voltage Range
VGA Gain Sensitivity
VGA Input Impedance
RF Mixer Output Impedance
VGA/Mixer Conversion Gain
VGA/Mixer Output Power
-30
dBc
17
dB
V
dB/V
dB
dBm
1.0 to 2.0
17
515-j994
50
-3 to +14
-9
Positive Slope
374MHz
With matching elements.
With 50
match on the output.
1dB compression - Single Sideband,
TX GC=1.0V. (Desired signal power)
1dB compression - Single Sideband,
TX GC=2.0V. (Desired signal power)
VGA/Mixer Output Power
-4
dBm
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