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PDF ACPM-7391 Data sheet ( Hoja de datos )
| Número de pieza | ACPM-7391 | |
| Descripción | 4x4 Power Amplifier Module | |
| Fabricantes | AVAGO | |
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ACPM-7391
4x4 Power Amplifier Module
for UMTS1700(1750-1785MHz) and
UMTS1700/2100(1710-1755MHz)
Data Sheet
Description
The ACPM-7391, a Wide-band Code Division Multiple
Access(WCDMA) Power Amplifier (PA), is a fully matched
10-pin surface mount module developed for WCDMA
handset applications. This power amplifier module is
developed to cover both 1710-1755MHz(UMTS1700/2100)
and 1750-1785MHz (UMTS1700). The ACPM-7391 meets
the stringent WCDMA linearity requirements for output
power of up to 28dBm. The ACPM-7391 is also developed
to meet HSDPA specs.
The ACPM-7391 is designed to enhance the efficiency at
low and medium output power range by using 3-mode
control scheme with 2 mode control pins. This provides
extended talk time.
The ACPM-7391 is self contained, incorporating 50ohm
input and output matching networks.
Order information
Features
• Excellent Linearity
• Low quiescent current
• High Efficiency
PAE at 28 dBm: 40.3%
PAE at 16dBm: 18.6%
PAE at 8dBm: 6.5%
• 10-pin surface mounting package
4mmx4mmx1.1mm(typ)
• Internal 50ohm matching networks for both RF input
and output
• RoHS Compliant
Applications
• WCDMA Handset (HSDPA)
Part Number
ACPM-7391-TR1
ACPM-7391-BLK
No. of Devices
1000
100
Container
7”Tape and Reel
BULK
Functional Block Diagram
Vcc2(10)
RF Input
(2)
Vcc1 (1)
MMIC
Input
Match
Inter
DA Stage
Match
PA
Bias Circuit & Control Logic
Output
Match
RF Output
TR Switch
Vmode1
Vmode0
Ven
MODULE
1 page  
Table 5-1. UMTS1700/2100 Electrical Characteristics for WCDMA Mode (Vcc=3.4V, Ven=2.6V, T=25°C, Zin/Zout=50ohm) [1]
Characteristics
Symbol
Condition
Min. Typ. Max. Unit
Operating Frequency Range
Gain
F
Gain_hi
Gain_mid
High Power Mode, Pout=28dBm
Mid Power Mode, Pout=16dBm
1712.4
23.5
13.5
–
28
18.5
1752.6
MHz
dB
dB
Gain_low Low Power Mode, Pout=8dBm
13 17.5
dB
Power Added Efficiency
PAE_hi
PAE_mid
PAE_low
High Power Mode, Pout=28dBm
Mid Power Mode, Pout=16dBm
Low Power Mode, Pout=8dBm
35 38.6
13.1 19.6
4.6 6.5
%
%
%
Total Supply Current
Icc_hi High Power Mode, Pout=28dBm
480 530 mA
Quiescent Current
Icc_mid
Icc_low
Iq_hi
Mid Power Mode, Pout=16dBm
Low Power Mode, Pout=8dBm
High Power Mode
59 85 mA
28 40 mA
100 120 mA
Iq_mid
Mid Power Mode
20 26 mA
Enable Current
Iq_low
Ien_hi
Ien_mid
Low Power Mode
High Power Mode
Mid Power Mode
14 18
0.18 1
0.18 1
mA
mA
mA
Ien_low
Low Power Mode
0.18 1
mA
Control Current
Imode0_mid
Imode1_low
Imode0_low
Mid Power Mode
Low Power Mode
Low Power Mode
0.4 1
0.18 1
0.4 1
mA
mA
mA
Total Current in Power-down mode Ipd
Ven=0V
0.2 5
µA
Adjacent Channel 5 MHz offset ACLR1_hi
Leakage Ratio [2] 10 MHz offset ACLR2_hi
High Power Mode, Pout=28dBm
-41 -37 dBc
-55 -46 dBc
Harmonic
Suppression
5 MHz offset
10 MHz offset
5 MHz offset
10 MHz offset
Second
Third
ACLR1_mid
ACLR2_mid
ACLR1_low
ACLR2_low
2f0
3f0
Mid Power Mode, Pout=16dBm
Low Power Mode, Pout=8dBm
High Power Mode, Pout=28dBm
-45 -37 dBc
-60 -46 dBc
-42 -37 dBc
-57 -46 dBc
-38 -33 dBc
-63 -50 dBc
Input VSWR
VSWR
Stability (Spurious Output)
S
VSWR 6:1, All phase
Noise Power in Rx Band
RxBN High Power Mode, Pout=28dBm
1.6:1 2.0:1
-60 dBc
-138 -135 dBm/Hz
Phase Discontinuity
Ruggedness
PDlow_mid
PDmid_high
Ru
low power mode ļmid power mode, at Pout=8dBm
mid power mode ļhigh power mode, at Pout=16dBm
Pout<28dBm, Pin<10dBm, All phase
High Power Mode
10 deg
15 deg
10:1 VSWR
Notes:
1. Electrical characteristics are specified under WCDMA modulated ( 3GPP Uplink DPCCH + 1DPDCH ) signal
2. ACP is expressed as a ratio of total adjacent power to signal power, both with 3.84MHz bandwidth at specified offsets.
5 Page 
CoolPAM
Avago Technologies’ CoolPAM is stage-bypass PA technol-
ogy which saves more power compared with convention-
al PA. With this technology, the ACPM-7391 has very low
quiescent current and efficiencies at low and medium
output power ranges are very high.
Incorporation of bias circuit
The ACPM-7391 has internal bias circuit, which removes
the need for external constant voltage source (LDO). PA
on/off is controlled by Ven. This is digitally control pin.
3-mode Power control with two mode control pins
The ACPM-7391 supports three power modes (low power
mode/mid power mode/high power mode) with two
mode control pins (Vmode0 and Vmode1). This control
scheme enables the ACPM-7391 to save more power,
which accordingly gives extended talk time.
PDF (probability density function) in Figure 15 showing
distribution of output power of mobile in real field gives
motivation for stage-bypass PA. Output power is less
than 16dBm for most of operating time (during talking),
so it is important to save power consumption at low and
medium output power ranges
Mode control pins
Vmode0 and Vmode1 are digitally controlled pins and
they control operating mode of PA and truth table is sum-
marized in table 3. These pins do not require constant
voltage for interface, but high voltage input range is 1.9
though 2.9V
Application on mobile board
Figure 16 shows one application example on mobile. C4
and C5 should be placed nearby pin1 and pin10. Trans-
mission line length after PA output should be minimized
to reduce conduction loss.
VBATT
C6
C4
RF In
TX filter
C9
C3
BB
PA_R1
PA_R0
PA_ON
Vcc1 Vcc2
IN GND
Vmode1 OUT
Vmode0 GND
Ven GND
ACPM-7391
C2
C1
C5
output matching circuit
C8
Coupler
RF Out
C7 L1
Figure 16. Peripheral Circuits
Figure 15. PDF and Current
Average current & Talk time
Average current consumed by PA can be calculated by
summing up current at each output power weighted with
probability. So it is expressed with integration of multipli-
cation of current and probability at each output power.
Average current = ∫ (PDF x Current)dp
Talk time is extended more as average current consump-
tion is lowered
Load Insensitivity
With the trend to remove the isolator from the Tx chain
in UMTS handsets, the performance demands of Load
Insensitivity become dependent on the combined per-
formance of the remaining elements in the TX chain: the
power amplifier, coupler, antenna as well as the physical
layout on the phone board. The ACPM-7391, as part of
optimized design, meets the necessary linearity require-
ments over a 4:1 VSWR mismatch at the antenna plane.
In the case of the ACPM-7391, the output stage has
been designed for slightly higher Pout to provide the
necessary margin to meet linearity under the mismatch
experienced at the PA output port resulting from the
forced antenna mismatch. Documentation is available
that provides a more complete description of the system
considerations and measurement considerations.
To illustrate the system performance using the ACPM-
7391, Figure 17 shows measurement of TX chain with
VSWR fixed at 4:1. ACLR1 is kept higher than -38dBc over
all phases and gain variance is about 2dB.
11
11 Page | ||
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| PDF Descargar | [ Datasheet ACPM-7391.PDF ] | |
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