RF3158PCBA-41X View Datasheet(PDF) - RF Micro Devices
Part Name
Description
MFG CO.
'RF3158PCBA-41X' PDF : 26 Pages View PDF
RF3158
24 of 26
RF3158 Power Amplifier
Simplified Block Diagram of a Single Band
TX_EN
VRAMP
VBATT
H(s)
RF IN
RF OUT
AGC Amplifier
TX_EN
Power On Sequence
GMSK Power On/Off Sequence
VBATT
BAND_SEL
VMODE
TX_EN
VRAMP
3.2V to 4.5V
>1.5V High Band
<0.7V Low Band
<0.7V GMSK Mode
Power On Sequence:
1. Apply VBATT
2. Apply BAND_SEL
3. Apply Low on VMODE
4. Apply minimum
VRAMP (~0.3V)
5. Apply TX_EN
6. Ramp VRAMP for
desired output power
>1.5V PA ON
2.1V for max Pout
~0.3V for min Pout
>0μs >1.5μs
Time
>0μs
8PSK Power On/Off Sequence
RFIN can be applied at
any time. For good
transient response it
must be applied before
power ramp begins.
The Power Down
Sequence is the reverse
order of the Power On
Sequence.
VBATT
BAND_SEL
VMODE
VRAMP
TX_EN
3.2V to 4.5V
>1.5V High Band
<0.7V Low Band
>1.5V 8PSK Mode
>2.1V High Bias Mode
>0.4V Low Bias Mode
>1.5V PA ON
Power On Sequence:
1. Apply VBATT
2. Apply BAND_SEL
3. Apply High on
VMODE
4. Apply bias control
voltage on VRAMP
5. Apply TX_EN
6. Ramp RFIN amplitude
for desired output power
The Power Down
Sequence is the reverse
order of the Power On
Sequence.
RFIN
Pout = Pin + Gain
>0μs >1.5μs
Time
>0μs
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
Rev A2 DS070615
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