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PDF ACPM7813 Data sheet ( Hoja de datos )
| Número de pieza | ACPM7813 | |
| Descripción | CDMA/AMPS Power Amplifier Module | |
| Fabricantes | Hewlett-Packard | |
| Logotipo |  |
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Agilent ACPM-7813
CDMA/AMPS
Power Amplifier Module
Data Sheet
Description
The ACPM-7813 is a fully
matched CDMA Power amplifier
module. Designed around Agilent
Technologies’ new Enhancement
Mode pHEMT process, the
ACPM-7813 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
packageD, tahteaSAhCePeMt4-U78.c1o3mis cost
and size competitive.
The ACPM-7813 is another key
component of the Agilent
CDMAdvantage RF chipset.
Vdd1
Vbias
Vdd2
Features
• Operating frequency:
824 – 849 MHz
• 28.5 dBm linear output power
@ 3.4 V
• 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
Bias Circuit
On Chip
Inter-stage
Match
Passive
Output
Match
Output
DataShee
Vcntl
Single control bias setting for low Idq
and 40%PAE at Pout = 28.5 dBm
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Ordering Information
Part Number
ACPM-7813-BLK
ACPM-7813-TR1
No. of Devices
10
1000
Container
Bulk
7” Tape and Reel
Tape Dimensions and Orientation
0.30 ± 0.05
2.00 ± 0.05[1]
φ1.55 ± 0.05
CL 4.38 ± 0.10
4.38 ± 0.10
4.00 ± 0.10[2]
1.75 ± 0.10
5.50 ± 0.05[3]
12.00 ± 0.30
et4U.com
1.80 ± 0.10
8.00 ± 0.10
Notes:
DataSheet4U.com
1. Measured from centerline of sprocket hole to centerline of pocket
2. Cumulative tolerance of 10 sprocket holes is ±0.2 mm
3. All dimensions in millimeters unless otherwise stated.
4.38 ± 0.10
Agilent
ACPM-7813
YYWWDD
XXXX
φ1.50 (MIN)
DataShee
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Design Tips to use Vcntl pin
Power Amplifier Control Using Vcntl
Pin on ACPM-7813
Power amplifier control scheme
in CDMA systems is one of the
important and challenging
aspects of CDMA-based handset
design. Handset designers must
balance maintaining adequate
linearity while optimizing
efficiency at high, medium and
low output power levels. The
primary method to achieve these
goals is to adjust the bias of the
PA as a function of output power.
Theoretically, the best efficiency
would be achieved when the bias
of the PA is continually adjusted
based on the output power
requirement of the PA. However,
implementing this type of circuit
can be complex and costly.
Therefore several different
approaches have been developed
to provide an acceptable trade-
off between optimum efficiency
and optimum manufacturability.
This application section reviews
four methods of controlling the
bias of a CDMA power amplifier:
fixed, step, logical and dynamic.
1. Fixed Bias Control
Using a fixed bias point on the
PA is the traditional method, and
it is the simplest. For example, a
fixed control voltage of 2.5V is
recommended when using
Agilent’s Power Amplifier, 2.5V
Vcntl for ACPM-7813. The Vcntl
pin on the PA is controlled by
PA_ON pin of the baseband IC.
When PA_ON is HIGH, the output
RF signal of the PA is enabled,
enabling the subscriber unit to
transmit the required data. The
switch circuit also controls the
on/off state of the PA.
Below is an example of how to
control the operation of the
ACPM-7D81a3tauSshinegett4hUe.cPoAm_ON and
Vcntl pin of the PA.
Power Mode
Shut Down
High Power
PA_ON
LOW
HIGH
Vcntl
0V
2.5V
Power Range
—
≤ 28.5 dBm
To Duplexer
Vbias
Vdd2
Vdd1 PA
Vcntl
Battery
TxIC
Baseband
IC
Enable
Switch Circuit for PA
Vcntl
PMIC or LDO
PA_ON
Note: PMIC: Power Management IC
LDO: Low Drop Output (Regulator)
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| PDF Descargar | [ Datasheet ACPM7813.PDF ] | |
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