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參數(shù)資料
| 型號： | RF1450 |
| 廠商： | RF MICRO DEVICES INC |
| 元件分類： | 衰減器 |
| 英文描述： | RoHS Compliant & Pb-Free Product Package Style: QFN, 16-pin, 3mmx3mm |
| 中文描述： | 0 MHz - 2500 MHz RF/MICROWAVE SGL POLE FOUR THROW SWITCH, 0.8 dB INSERTION LOSS |
| 封裝： | 3 X 3 MM, 0.90 MM HEIGHT, LEADLESS, QFN-16 |
| 文件頁數(shù)： | 6/12頁 |
| 文件大?。?/td> | 406K |
| 代理商： | RF1450 |
6 of 12
RF1450
Rev A0 DS070531
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
General Information
Control Logic
The switch is operable in four states (see Truth table, below). The switch is designed for two modes: Active and Stand-by. These
modes are controlled by the V
DD
signal. When VDD is high, the switch is active. The start-up time is defined as the switch acti-
vated is critical.
Truth Table for Switch States
State
1
Turn On Sequence
Turn Off Sequence
Note: V
BATT
must be applied before applying V
DD
when turning on the part. The part must be turned off in reverse order, V
DD
first then V
BATT
.
Electrical Test Methods
The electrical parameters for the switch were measured on test PWB provided by the switch supplier. The test PWB includes
means for decoupling RF signals from control signal port (shunt capacitor at control signal ports).
All measurements are done with calibration plane at switch pins. The effect of test board losses and phase delay has been
removed from the results.
Reflected Harmonics Measurement
The reflected harmonics should be measured with the output ports connected to open-circuit or short-circuit impedances. An
outline of the measurement set-up is shown in Figure 1. The power in and reflected signal levels are calibrated to the DUT input
(reference plane). Note that the power is calibrated in a 50
Ω
system. The assumption is made that the measurement system
is designed so that the harmonic levels of external PA, etc., are far below the signals produced by the DUT.
CTRL1
V
LOW
V
LOW
V
HIGH
V
HIGH
CTRL2
V
LOW
V
HIGH
V
LOW
V
HIGH
RF Path
ANT-RF1
2
ANT-RF2
3
ANT-RF3
4
ANT-RF4
VBATT
ON
X
X
X
VDD
OFF
ON
X
X
CTRL1
OFF
OFF
ON
X
CTRL2
OFF
OFF
ON
X
RF Power
OFF
OFF
OFF
ON
1
2
3
4
VBATT
ON
ON
ON
OFF
VDD
ON
ON
OFF
X
CTRL1
ON
OFF
X
X
CTRL2
ON
OFF
X
X
RF Power
OFF
X
X
X
1
2
3
4
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