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Teilenummer | ACPM-7833 |
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Beschreibung | Power Amplifier Module | |
Hersteller | AVAGO | |
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Gesamt 20 Seiten ACPM-7833
CDMA1900 (PCS) Power Amplifier Module
Data Sheet
Description
The ACPM-7833 is a fully matched CDMA Power
amplifier module. Designed around Avago
Technologies’ new Enhancement Mode pHEMT
process, the ACPM-7833 offers premium performance
in a very small form factor. Fully matched to 50 Ohms
on the input and output.
The amplifier has excellent ACPR and efficiency
performance at max Pout and low quiescent current
with a single bias control voltage. For even lower
quiescent current, a dynamic bias control circuit can
be used by varying the voltage on the Vcntl pin
between 1.2V to 2.5V.
Designed in a surface mount RF package, the ACPM-
7833 is cost and size competitive.
The ACPM-7833 is another key component of the
Avago Technologies CDMAdvantage RF chipset.
Features
• Operating frequency: 1850– 1910 MHz
• 28.5 dBm linear output power @ 3.4V
• High efficiency: 40% PAE
• Dynamic bias control for low midpower Idd
• Very low quiescent current with single control
voltage
• Internal 50 ohm matching networks for both RF IN/
OUT
• 3.2– 4.2V linear operation
• cdma2000 1xRTT capable
• Only 3 SMT parts needed
• 4.0 x 4.0 x 1.1 mm SMT package
Applications
• CDMA handsets
• Datacards
• PDAs
Input
Power
Input
Match
Vdd1
Vbias
Bias Circuit
On Chip
Inter-stage
Match
Vdd2
Passive
Output
Match
Output
Vcntl
Single control bias setting for low Idq
and 40% PAE at Pout = 28.5 dBm
Reel Drawing
BACK VIEW
Shading indicates
thru slots
18.4 max.
25
min wide (ref)
Slot for carrier tape
insertion for attachment
to reel hub (2 places 180 apart)
FRONT VIEW
178
+0.4
–0.2
50 min.
12.4
+2.0
–0.0
1.5 min.
13.0±0.2
21.0±0.8
NOTES:
1. Reel shall be labeled with the following
information (as a minimum).
a. manufacturers name or symbol
b. Avago Technologies part number
c. purchase order number
d. date code
e. quantity of units
2. A certificate of compliance (c of c) shall
be issued and accompany each shipment
of product.
3. Reel must not be made with or contain
ozone depleting materials.
4. All dimensions in millimeters (mm)
6
6 Page 2. Step Bias Control and Dynamic Bias Control (if controled
PDM1)
The PDM1 output from the baseband IC can be used
to create a software-programmable voltage, to be used
at the phone designer’s discretion. To get high
efficiency and better ACPR, the phone designers can
change control voltage of the PA by adjusting PDM1
voltage according to output power of PA. A caution
when using this approach—careful consideration must
be made to to avoid an abrupt discontinuity in the
output signal when the step bias control voltage is
applied.
The figure below is an example of how to control the
PA for multiple bias points using the PA_ON and Vcntl
pins.
Power Mode
Shut Down
Low Power
Mid Power
High Power
PA_ON
LOW
HIGH
HIGH
HIGH
Vcntl
0V
1.2V
1.6V
2.5V
Power Range
—
~ -5 dBm
-5 dBm ~ 13 dBm
13 dBm ~ 28.5 dBm
To Duplexer
Vbias
Vdd2
Vdd1 PA
Vcntl
Battery
TxIC
Enable
Switch Circuit for PA
R1
C1
Baseband
IC
PA_ON
PDM1
If PDM1 can be controlled then same circuit can be used for Dynamic bias control
12
12 Page | ||
Seiten | Gesamt 20 Seiten | |
PDF Download | [ ACPM-7833 Schematic.PDF ] |
Teilenummer | Beschreibung | Hersteller |
ACPM-7833 | Power Amplifier Module | AVAGO |
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