WIRELESS COMMUNICATIONS DIVISION
VCC1
VCC2
RFIN
GND
GND
Match
VCTRL
Match
TQM7638
DATA SHEET
3V HBT SiGe PCS Band
CDMA 4x4mm POWER
AMPLIFIER MODULE
RFOUT
GND
Bias Control
VREF
GND
Features
Product Description:
The TQM7638 is a 3V, 3 stage SiGe HBT Power Amplifier Module designed for use in
mobile phones. Its extremely small 4x4mm package makes it ideal for today’s
extremely small data enabled phones. Its RF performance meets the requirements for
products designed to IS-95/98 standards. The TQM7638 provides the capability to be
operated in one, two, or continuous quiescent current modes. In digital quiescent
current mode operation, the TQM7638 is controlled from the base-band processor
using a CMOS compatible ICQ control voltage. Overall current consumption of the
device is minimized by selecting the lowest ICQ state available for each power output
level. RF input and output matching is included within the module; therefore, minimal
external circuitry is required.
The TQM7638 gives excellent RF performance with low current consumption resulting
in longer talk times in portable applications. The small 6mm square surface mount
package is ideal for new generation small and light phones.
Electrical Specifications:
Parameter
Min
Frequency
CDMA mode
Typ
1850
Pout1
CDMA Mode Efficiency1
Max
Units
1910
MHz
28
dBm
31
%
Note 1:
Test Conditions CDMA Mode: VCC1=3.4VDC, VCC2=3.4VDC, VREF =2.90VDC, VCTRL=0.5VDC,
Tc=25°C, Pout = 28.0dBm
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§
Analog continuous bias capability with
excellen linearity over 1.9 to 3.0VDC and
temperature stability over –30C to 85C
§
Excellent PAE
§
Small 10 pin 4x4mm module
§
1xRTT Compatible
§
Industry compatible digital quiescent current
state control
§
Analog continuous bias capability
§
CMOS compatible logic input
§
Internally matched input and output
§
Full ESD Protection
§
Low leakage current
Applications
§
Tri Mode CDMA phones
§
PCS Band CDMA based mobile phones
1
TQM7638 - Preliminary
Data Sheet
Absolute Maximum Ratings
Symbol
Parameter
Absolute Maximum
Units
Value
VCC1, VCC2
Power Supply Voltage, no RF Applied
-0.5 to 6.0
RF Applied
-0.5 to 5.0
Bias reference voltages (VREF) and bias control voltage (VCTRL).
-0.5 to 5.0
VDC
2.5
W
Case Temperature, Survival
-40 to +100
°C
TSTG
Storage Temperature
-40 to +150
°C
RFIN
DC Grounded RF input, 50ohm RF impedance
0 to 0V
VDC
RFOUT
DC Blocked RF output, 50 ohm RF impedance
-20V to 20V
VDC
VREF, VCTRL
PDISS
Power Dissipation
TC
VDC
Note: The part may not survive all maximums applied simultaneously.
CDMA Mode Electrical Characteristics1,2,3
Parameter
Conditions
RF Frequency
Min.
Typ/Nom
1850
Max.
Units
1910
MHz
Pout, ICQ-hi
VCTRL = low
28
dBm
Large Signal Gain, ICQ-hi
Pout = 28dBm, VCTRL = low
29
dB
Large Signal Gain, ICQ-low
Pout = 15dBm, VCTRL = high
26
dB
Gain Variation vs. Temp.
-30 to 85 °C, Pout=28dBm
+/-2.5
dB
Quiescent Current, ICQ-hi
VCTRL = low
124
mA
Quiescent Current, ICQ-low
VCTRL = high
82
mA
Icc
Pout = 28dBm, VCTRL = low
607
mA
Power Added Efficiency
Pout = 28dBm, VCTRL = low
31
%
Adjacent Channel Power (ACP)
Pout = 28dBm, VCTRL = low, IS-95 Standard
-49
Alternate Channel Power (ALT)
Pout = 28dBm, VCTRL = low, IS-95 Standard
-58
dBc
Output Power Low-Power Icq state
ACPR=-47dBc, VCTRL = high, IS-95 Standard
15
dBm
2
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-
dBc
Preliminary - TQM7638
Data Sheet
CDMA Mode Electrical Characteristics1,2,3 (cont’d)
Noise Power in Rx band
Pout=28dBm, VCTRL = low, IS-95 Standard
-88
dBm/30KHz
Input VSWR
Both ICQ-hi & ICQ-low
2:1
Second Harmonic
Pout=+28dBm, VCTRL = low, IS-95 Standard
2.7VDC
Continuous
Gnd
~1.9 to
Bias
Off
3.0VDC
Low
0VDC
are a number of VCO signals and IF signals used in a given
phone design, so it is important to protect the PA module from
interfering signals and to limit any interference coming from the
PA itself. Care should be taken when removing any of the RF
bypassing components.
One final area of concern is with excessive bypassing. If too large
a value of bypassing capacitor is used on the control line, it could
reduce the frequency response of the control line to the point
where a specification failure could occur. Please be sure that the
logic line and regulated supply lines driving the power amplifier
Application
control lines are adequate to supply peak current requirements of
The applications circuit for the TQM7638 is very simple since most the bypassing capacitors chosen on the control lines.
of the critical components are included inside the module. There
are several important considerations when using the module in a
phone design.
One Bias State Operation
The TQM7638 can be operated using one bias state. If this mode
First of all, it is important that the source impedance of the VCC
is selected, VCNTRL should be connected to ground.
power supply be very low. This is because the high current
demand during the modulation peaks of the CDMA waveform can
Continuous Bias State Operation
introduce voltage ripple at the symbol rate that will introduce
The TQM7638 can be operated in continuous bias mode in which
additional inter-modulation distortion or Adjacent Channel Power
the VREF voltage is varied from ~1.9V to 3.0V to set the PAM
distortion at the output of the power amplifier. If the power
quiescent current as appropriate for the desired output power
amplifier has a quiescent current of 100 mA and a peak current
level. In this mode, VCNTRL should be connected to ground on the
demand in excess of 1 amp, it is possible to see 900 mA change
phone board. Specific application circuit information for this mode
in the current required from VCC as the modulated signal moves
is available upon request.
from one extreme to the other. If the power supply source
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5
TQM7638 - Preliminary
Data Sheet
Package Pin-Out:
1
10
VCC1
VCC2
2
GND
RFIN
RFOUT
Match
3
9
Match
8
GND
4
VCTRL
Bias Control
VREF
5
GND
7
GND
6
Pin Descriptions:
Pin Name
Pin #
Description and Usage (Equivalent Circuit)
GND
Paddle
Device Ground and Heat Sink. Needs good thermal path to remove heat.
VCC1
1
Collector supply for input stage.
RFin
2
RF input. The RF circuit is DC grounded. 50 Ohm RF
impedance.
VCTRL
4
CMOS compatible logic level to set bias level
VREF
5
Regulated supply for setting bias. Vref is set to 0VDC to power-off the TQM7638
RFOUT
8
RF output. The RF circuit is DC blocked internally. 50 ohm RF impedance.
VCC2
10
Collector supply for output stage.
GND
3, 6, 7, 9
Ground
TriQuint recommends use of several via holes to the backside ground under the Paddle.
6
RFin
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Preliminary -TQM7638
Data Sheet
Recommended PC board layout to Accept 10 Pin Module Package:
T
J
U
K
D
S
N
M
E
DIMENSION
D
E
J
K
M
N
S
T
U
MM
3.85
4.30
0.68
0.45
0.85
1.90
3.80
2.00
1.00
Notes:
1 Only ground signal traces are allowed directly under the package
2 Primary dimensions are in millimeters alternate dimensions are in inches.
For additional information and latest specifications, see our website: www.triquint.com
7
TQM7638 - Preliminary
Data Sheet
Package Type: 10 Pin Plastic Module Package
Pin 1
10
Pin 1
Indicator
2
9
3
8
4
7
5
6
Side View
Top View
5
6
4
7
3
8
2
9
1
10
Bottom View
8
For additional information and latest specifications, see our website: www.triquint.com
Preliminary - TQM7638
Data Sheet
Package Type: 10 Pin Plastic Module Package (cont’d)
DESIGNATION
DESCRIPTION
A
OVERALL HEIGHT
D
PACKAGE LENGTH
DIMENSION
1.06
+/-0.09 mm
4.0 +/-0.1 mm
E
PACKAGE WIDTH
J
SOLDER MASK OPENING LENGTH AND WIDTH
4.0 +/-0.1 mm
K
METAL PAD LENGTH AND WIDTH
0.40 +/-0.05 mm
P
DISTANCE BETWEEN METAL PAD AND PACKAGE
EDGE
0.10 +/-0.025 mm
0.575 +/-0.075 mm
T
GND SOLDER MASK OPENING WIDTH
2.00 +/-0.05 mm
S
GND SOLDER MASK OPENING LENGTH
3.80 +/-0.05 mm
R
DISTANCE BETWEEN GND SOLDER MASK OPENING
AND PACKAGE EDGE
0.10 +/-0.1 mm
Q
DISTANCE BETWEEN GND SOLDER MASK OPENING
AND PACKAGE EDGE
1.00 +/-0.1 mm
e
TERMINAL PITCH FOR TERMINAL 1-10, 2-9, 3-8, 4-7
AND 5-6
3.400 mm
e1
TERMINAL PITCH FOR TERMINAL 1-2-3-4-5 AND 6-78-9-10
0.850 mm
Notes:
1. GND SOLDER MASK OPENING IS NOT CENTERED ON THE PACKAGE
Additional Information
For latest specifications, additional product information, worldwide sales and distribution locations, and information about TriQuint:
Web: www.triquint.com
Tel: (503) 615-9000
Email: info_wireless@tqs.com
Fax: (503) 615-8902
For technical questions and additional information on specific applications:
Email: info_wireless@tqs.com
The information provided herein is believed to be reliable; TriQuint assumes no liability for inaccuracies or omissions. TriQuint assumes no responsibility for the use of
this information, and all such information shall be entirely at the user's own risk. Prices and specifications are subject to change without notice. No patent rights or
licenses to any of the circuits described herein are implied or granted to any third party.
TriQuint does not authorize or warrant any TriQuint product for use in life-support devices and/or systems.
Copyright © 2002 TriQuint Semiconductor, Inc. All rights reserved.
Revision 0.4, September 24, 2002
For additional information and latest specifications, see our website: www.triquint.com
9
