RMPA2455 데이터 시트보기 (PDF) - Fairchild Semiconductor
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RMPA2455 Datasheet PDF : 10 Pages
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Evaluation Board Turn-On Sequence1
Recommended turn-on sequence:
1) Connect common ground terminal to the Ground (GND) pin
on the board.
2) Apply low voltage 0.0 to +1.0 V to pin VL.
3) Apply positive supply voltage VC1 (= 5.0V) to pin VC1 (first
stage collector).
4) Apply positive supply voltage VC2 (= 5.0V) to pin VC2
(second stage collector).
5) Apply positive bias voltage VM12 (= 3.3V) to pin VM12 (bias
networks).
6) At this point, you should expect to observe the following posi-
tive currents flowing into the pins:
Pin
VM12
VC1
VC2
VL
Current
15.0 – 20.0 mA
45.0 – 65.0 mA
60.0 – 80.0 mA
<1 nA
7) Apply input RF power to SMA connector pin RFIN. Currents
in pins VC1 and VC2 will vary depending on the input drive
level.
8) Vary positive voltage VL on pin VREG from +0.5V to +2.4V to
shut down the amplifier or alter the power level. Shut down cur-
rent flow into the pins:
Pin
VM12
VC1
VC2
VL
Current
<0.7 mA
<1 nA
<1 nA
<0.25 mA
Recommended turn-off sequence:
Use reverse order described in the turn-on sequence above.
Note:
1. Turn on sequence is not critical and it is not necessary to sequence power sup-
plies in actual system level design.
RMPA2455 Rev. F
8
www.fairchildsemi.com
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