Data Sheet
101749A
20012003 Skyworks Solutions, Inc., All Rights Reserved.
September 19, 2003
CX77304-15
PA Module for Dual-band GSM850 PCS1900 / GPRS Applications
The CX77304-15 Power Amplifier Module(PAM) is designed in a compact form factor
for dual-band cellular handsets comprising GSM850 and PCS1900 operation. It also
supports Class 10 General Packet Radio Service (GPRS) multislot operation.
The module consists of
separate Heterojunction Bipolar Transistor (HBT) PA blocks
for the GSM850 and PCS1900 bands, interface circuitry, and RF input and output
ports internally matched for 50
impedance to reduce the number of external
components.
The PA blocks are fabricated on a single Gallium Arsenide (GaAs) die
and share common power supply pins for current distribution.
Extremely low
leakage current (2
A, typical) of the dual PA module maximizes handset standby
time.
The
CX77304-15
also contains band-select switching circuitry to select GSM
(logic 0) and PCS (logic 1) as determined from the Band Select (BS) signal.
In the
block diagram shown below, the BS pin selects the PA output (PCS OUT or
GSM OUT) while the Analog Power Control (APC) controls the level of output power.
A custom CMOS IC provides the internal interface circuitry including
a current
amplifier that minimizes the required power control current (I
APC
) to 10
A,
typical. The GaAs die, the Silicon (Si) die, and passive components are mounted
on a multi-layer laminate substrate and the assembly encapsulated with plastic
overmold.
Functional Block Diagram
CMOS
Bias
Controller
GSM IN
GSM OUT
PCS IN
PCS OUT
Power Control
Band Select
HBT
Match
Match
Match
Match
Distinguishing Features
High efficiency
GSM 55%
PCS 45%
Input/output internally matched
to 50
Small outline
9.1 mm
11.6 mm
Low profile
1.5 mm maximum
Low APC current
10
A, typical
Gold plated, lead-free contacts
Applications
Dual-band cellular handsets
encompassing
Class 4 GSM850
PCS1900, and
up to Class 10 GPRS multislot
operation
Electrical Specifications
CX77304-15
PA Module for Dual-Band GSM850 PCS1900 / GPRS Applications
2
Skyworks Solutions, Inc.
101749A
Proprietary Information
September 19, 2003
Electrical Specifications
The following tables list the electrical characteristics of the CX77304-15 Power Amplifier.
Table 1
lists the absolute maximum ratings and
Table 2
shows the recommended operating conditions.
Table 3
shows the electrical characteristics of the CX77304-15 for GSM and PCS modes. A typical
CX77304-15 application diagram appears in
Figure 1
.
The CX77304-15 is a static-sensitive electronic device and should not be stored or operated near
strong electrostatic fields. Detailed ESD precautions along with information on device dimensions,
pin descriptions, packaging and handling can be found in later sections of this data sheet.
Table 1. Absolute Maximum Ratings
Parameter
Minimum
Maximum
Unit
Input Power (P
IN
)
--
15
dBm
Supply Voltage (V
CC
), Standby, V
APC
0.3 V
--
7
V
Control Voltage (V
APC
)
0.5
V
CC
MAX
0.2
(See
Table 3
)
V
Storage Temperature
55
+100
C
Table 2. Recommended Operating Conditions
Parameter
Minimum
Typical
Maximum
Unit
Supply Voltage (V
CC
)
2.8
3.2
4.6V
(1)
V
Supply Current (I
CC
)
0
--
2.5
(1)
A
Operating Case Temperature (T
CASE
)
1-Slot (12.5% duty cycle)
2-Slot (25% duty cycle)
3-Slot (37.5% duty cycle)
4-Slot ( 50% duty cycle)
20
20
20
20
--
100
90
75
60
C
NOTE(S):
(1)
For charging conditions with V
CC
> 4.6 V, derate I
CC
linearly down to 0.5 A max at V
CC
= 5.5 V.
CX77304-15
Electrical Specifications
PA Module for Dual-Band GSM850 PCS1900 / GPRS Applications
101749A
Skyworks Solutions, Inc.
3
September 19, 2003
Proprietary Information
Table 3. CX77304-15 Electrical Specifications
(1)
(1 of 3)
Parameter
Symbol
Test Condition
Min
Typical
Max
Units
General
Supply voltage
V
CC
--
2.8
3.2
4.6
V
Power Control Current
I
APC
--
--
10
100
A
Leakage Current
I
q
V
CC
= 4.5 V
V
APC
= 0.3 V
T
CASE
= +25
C
P
IN
60 dBm
--
--
5
A
APC Enable Threshold
V
APC
TH
--
200
--
600
mV
APC Enable Switching Delay
t
SW
Time from V
APC
V
APC
TH
until
P
OUT
(P
OUT_FINAL
3 dB)
5
8
s
GSM Mode (f = 824 to 849 MHz and
P
IN
= 6 to 10 dBm)
Frequency range
f
--
824
--
849
MHz
Input power
P
IN
--
6
--
10
dBm
Analog power control voltage
V
APC
P
OUT
= 32 dBm
1.2
1.7
2.1
V
Power Added Efficiency
PAE
V
CC
= 3.2 V
P
OUT
34.0 dBm
V
APC
2.0 V,
pulse width 577
s,
duty cycle 1:8
T
CASE
= +25
C
50
55
--
%
2
nd
to 13
th
harmonics
2f
0
to 13f
0
BW = 3 MHz
5 dBm
P
OUT
35 dBm
--
--
7
dBm
Output power
P
OUT
V
CC
= 3.2 V
V
APC
2.0 V
T
CASE
= +25
C
34.0
34.5
--
dBm
P
OUT
MAX LOW VOLTAGE
V
CC
= 2.8 V
V
APC
2.6 V
T
CASE
= 20
C to +100 C
(See
Table 2
for multislot)
P
IN
= 6 dBm
32
33
--
dBm
P
OUT
MAX HIGH VOLTAGE
V
CC
= 4.6 V
V
APC
2.6 V
T
CASE
= 20
C to +100 C
(See
Table 2
for multislot)
P
IN
= 6 dBm
32
33
--
dBm
Input VSWR
IN
P
OUT
= 5 to 35 dBm,
controlled by V
APC
--
1.5:1
2.2:1
--
Forward isolation
P
OUT
STANDBY
P
IN
= 10 dBm
V
APC
= 0.3 V
--
35
30
dBm
Electrical Specifications
CX77304-15
PA Module for Dual-Band GSM850 PCS1900 / GPRS Applications
4
Skyworks Solutions, Inc.
101749A
Proprietary Information
September 19, 2003
Spurious
Spur
No parasitic oscillation with all
combinations of the following
parameters:
V
APC
= controlled
(2)
P
IN
= 10.0 dBm
V
CC
= 2.8 V to 4.6 V
Load VSWR = 6:1, all phase angles
--
--
36 dBm
Output Power Switching Speed
step input of V
APC
to RF output
power within 1 dB of final value
starting state: V
APC
= 0.6 V
--
--
3
s dBm
Load mismatch
Load
All combinations of the following
parameters:
V
APC
= controlled
(2)
P
IN
= 10 dBm
V
CC
= 2.8 V to 4.6 V
Load VSWR = 10:1, all phase
angles
No module damage or permanent
degradation
Noise power
P
NOISE
At f
0
+ 20 MHz
T = 25 C
RBW = 100 kHz
V
CC
= 3.2 V
P
IN
= 6 dBm
P
OUT
= 34.0 dBm
--
--
84
dBm
At f
0
+ 10 MHz
T = 25 C
RBW = 100 kHz
V
CC
= 3.2 V
P
IN
= 6 dBm
P
OUT
= 34.0 dBm
--
--
76
dBm
At 1930 to 1990 MHz
RBW = 100 kHz
V
CC
= 3.2 V
P
OUT
= 34.0 dBm
--
--
90
dBm
PCS Mode (f = 1850 to 1910 MHz and
P
IN
= 6 to 10 dBm)
Frequency range
f
--
1850
--
1910
MHz
Input power
P
IN
--
6
--
10
dBm
Analog power control voltage
V
APC
P
OUT
= 29.5 dBm
1.35
1.7
2.1
V
Power Added Efficiency
PAE
V
CC
= 3.2 V
P
OUT
32 dBm
V
APC
2.0 V,
pulse width 577
s,
duty cycle 1:8
T
CASE
= +25
C
42
45
--
%
2
nd
to 7
th
harmonics
2f
0
to 7f
0
BW = 3 MHz
5 dBm
P
OUT
32 dBm
--
--
7
dBm
Table 3. CX77304-15 Electrical Specifications
(1)
(2 of 3)
Parameter
Symbol
Test Condition
Min
Typical
Max
Units
CX77304-15
Electrical Specifications
PA Module for Dual-Band GSM850 PCS1900 / GPRS Applications
101749A
Skyworks Solutions, Inc.
5
September 19, 2003
Proprietary Information
Output power
P
OUT
V
CC
= 3.2 V
V
APC
2.0 V
T
CASE
= +25
C
32
32.5
--
dBm
P
OUT
MAX LOW VOLTAGE
V
CC
= 2.8 V
V
APC
2.6 V
T = 25
C
(See
Table 2
for multislot)
P
IN
= 6 dBm
30.0
30.5
--
dBm
P
OUT
MAX HIGH VOLTAGE
V
CC
= 2.8 V
V
APC
2.6 V
T
CASE
= 20
C to +100 C (See
Table 2
for multislot)
P
IN
= 6 dBm
29.0
30.5
--
dBm
Input VSWR
IN
P
OUT
= 0 to 32 dBm
controlled by V
APC
--
--
2:1
--
Forward isolation
P
OUT
STANDBY
P
IN
= 10 dBm, V
APC
= 0.3 V
--
40
35
dBm
Switching time
RISE
,
FALL
step input of V
APC
to RF output
power within 1 dB of final value
starting state: V
APC
= 0.6 V
--
--
3
s
dBm
Spurious
Spur
No parasitic oscillation with all
combinations of the following
parameters:
V
APC
= controlled
(3)
P
IN
= 10.0 dBm
V
CC
= 2.8 V to 4.6 V
Load VSWR = 6:1, all phase angles
--
--
36 dBm
Load mismatch
Load
All combinations of the following
parameters:
V
APC
= controlled
(3)
P
IN
= 10 dBm
V
CC
= 2.8 V to 4.6 V
Load VSWR = 10:1, all phase
angles
No module damage or permanent
degradation
Noise power
P
NOISE
At f
0
+ 20 MHz
T = +25 C
RBW = 100 kHz
V
CC
= 3.2 V
P
OUT
= 32 dBm
--
--
77
dBm
At 869 to 894 MHz
RBW = 100 kHz
V
CC
= 3.2 V
P
OUT
= 32 dBm
--
--
84
dBm
NOTE(S):
(1)
Unless specified otherwise: T
CASE
= 20 to max. operating temperature (see Table 2), RL = 50
, pulsed operation with pulse
width
2308 s and duty cycle 4:8, V
CC
= 2.8 V to 4.6 V.
(2)
I
CC
= 0A to xA, where x = current at P
OUT
= 34.0 dBm, 50
load, and V
CC
= 3.2 V.
(3)
I
CC
= 0A to xA, where x = current at P
OUT
= 32.0 dBm, 50
load, and V
CC
= 3.2 V.
Table 3. CX77304-15 Electrical Specifications
(1)
(3 of 3)
Parameter
Symbol
Test Condition
Min
Typical
Max
Units
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