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Agilent ACPM-7813 CDMA/AMPS Power Amplifier Module
Data Sheet
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 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-7813 is cost and size competitive. The ACPM-7813 is another key component of the Agilent CDMAdvantage RF chipset. * 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
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
Applications * CDMA handsets * Datacards
Vdd1
Vbias
Vdd2
* PDAs
Bias Circuit Power Input Match On Chip Inter-stage Match Passive Output Match
Input
Output
Vcntl
Single control bias setting for low Idq and 40%PAE at Pout = 28.5 dBm
Maximum Ratings [1] Parameter
Vdd Supply Voltage Power Dissipation [2] Bias Current Control Voltage (Vcntl) Amplifier Input RF Power Junction Temperature Storage Temperature (case temperature) -40C
Min.
Max.
6.0 V 2.5 W 1.5 A 3.0 V 10 dBm +150C +100C Recommended operating range of Vdd = 3.2 to 4.2 V, Ta = -30 to +85C Thermal Resistance[2] jc = 22.3C/W
Notes: 1. Operation of this device in excess of any of these limits may cause permanent damage. 2. Tcase = 25C
Package Marking and Dimensions
Gnd (Pin 10) Vbias (Pin 1) Vcntl Gnd RFin Gnd Vdd1
Agilent ACPM-7813 YYWWDD XXXX
Gnd RFout Gnd Vdd2
4.0 mm (sq) Top View
1.1 mm Side View Bottom View
Note: YYWWDD: year - work week - day XXXX: lot code
0.4000.076
0.8500.076 2.0000.076 0.8500.076 0.8500.076 4.0000.076 0.8500.076
3.8000.076
1.9960.076 3.4000.076
4.0000.076
1.1000.076
All units are in mm
2
Electrical Characterization Information
All tests are done in 50 system at Vdd1=Vdd2=Vbias = 3.4V, 25C, unless noted otherwise.
Parameter
Cellular CDMA
Frequency Range Gain (Fixed Cntl Voltage) Pout = 28.5 dBm Pout = 16 dBm Power Added Efficiency Pout = 28.5 dBm Pout = 16 dBm Total Supply Current
Units
Min
Typ
Max
Comments
MHz
824
849
dB
26 24.5
28 26.5
30 28.5
Vcntl= 2.5V Vcntl= 1.8V
% % mA mA mA dBc/30 kHz dBc/30 kHz mA mA mA mA
37 7.5
40 8.5 520 135 31 563 156
Vcntl= 2.5V Vcntl= 1.8V Pout = 28.5 dBm, Vcntl = 2.5V Pout =16 dBm, Vcntl = 1.8V Pout = -5 dBm, Vcntl = 1.2V Pout 28.5 dBm Pout 28.5 dBm 95 62 2.7 Pout 28.5 dBm, Vcntl= 2.5V Vcntl = 1.8V Vcntl = 1.2V Vcntl = 2.5V
ACPR @ 0.885 MHz offset ACPR @ 1.98 MHz offset Quiescent Current
-45 -56
-48 -59 82 54 25 2.0 2.0:1 2.5:1
Vcntl Current Input VSWR (Pout = 28.5 dBm) Input VSWR (Pout = 16 dBm) Noise Figure Noise Power @ 45 MHz offset in 869 - 894 MHz Stability (Spurious): Load VSWR 5:1 Harmonic Suppression: 2Fo
dB dBm/Hz dBc dBc -50 -30
4.5 -141 -138 All phases -40
AMPS
Frequency Range Gain Pout = 31.0 dBm Power Added Efficiency Pout = 31.0 dBm % 47 51 Vcntl= 2.5V MHz dB 824 26 28 849 30 Vcntl= 2.5V
3
Typical Performance, data measured in 50 system, Vdd1=Vdd2=Vbias = 3.4V, Vcntl = 2.5 V, T = 25C and Freq = 836 MHz unless
noted otherwise.
30 29 28
GAIN (dBm) GAIN (dB)
40
40 35
20 30
PAE (%)
27 26 25 24 23 22 0 5 10 15 Pout (dB) 20 25 30 Vcntl=2.5V Vcntl=1.6V Vcntl=1.2V
0
25 20 15 10
-20
-40 5 -60 0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 Vcntl (V) 0 0 5 10 15 Pout (dBm) 20 25 30
Figure 1. Gain vs. Pout.
500 200
Figure 2. Gain vs. Vcntl.
Figure 3. PAE vs. Pout.
-40 -45
400 150
Idd (mA) Idd (mA)
-50
ACPR (dBc)
300
-55 -60 -65
100
200
100
50
Vcntl=2.5V Vcntl=1.6V Vcntl=1.2V 0 5 10 Pout (dB) 15 20
-70 -75 0 5 10 15
Vcntl=1.2V Vcntl=1.6V Vcntl=2.5V 20 25 30
0 0 5 10 15 Pout (dBm) 20 25 30
0
Pout (dBm)
Figure 4. Idd vs. Output Power.
Figure 5. Idd vs. Pout.
Figure 6. ACPR (885 kHz offset) vs. Pout.
-50
HARMONIC SUPPRESSION (dBc)
-30 2nd 3rd -40
30
-55 -60
ACPR2 (dBc)
29
GAIN (dB)
-65 -70 -75 -80 -85 -90 0 5 10 15 Pout (dBm) 20 25 30
-50
28
-60
27
-70
26
-80 10
15
20 Pout (dBm)
25
30
25 10
15
20
25
30
35
Pout (dBm)
Figure 7. ACPR (1.98 MHz offset) vs. Pout.
60 50 40
PAE (%)
Figure 8. 2nd/3rd Harmonics vs. Pout.
Figure 9. AMPS Gain vs. Pout.
30 20 10 0 10
15
20
25
30
35
Pout (dBm)
Figure 10. AMPS PAE vs. Pout.
4
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] 1.55 0.05 4.00 0.10[2] 1.75 0.10
5.50 0.05[3] C L 4.38 0.10 4.38 0.10 12.00 0.30
1.80 0.10 8.00 0.10 4.38 0.10
1.50 (MIN)
Notes: 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.
Agilent ACPM-7813 YYWWDD XXXX
5
Reel Drawing
BACK VIEW Shading indicates thru slots 18.4 max.
178 +0.4
-0.2
50 min.
25 min wide (ref) Slot for carrier tape insertion for attachment to reel hub (2 places 180 apart)
12.4 +2.0
-0.0
FRONT VIEW
1.5 min. 13.00.2 21.00.8
NOTES: 1. Reel shall be labeled with the following information (as a minimum). a. manufacturers name or symbol b. Agilent 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
Application Information
The * * * * * * following material is presented to assist in general design and use of the APCM-7813. 3.0V Characterization, for use in Data Card Applications cdma2000 1XRTT Description and Characterization data Design tips on various methods to control the bias on Vcntl pin Description of ACPR measurement methods Description of Agilent evaluation demoboard for ACPM-7813 IR Reflow Profile (applicable for all Agilent E-pHEMT PAs)
3.0 V Characterization, Data Card Applications Electrical Data
All tests are done in 50 system at Vdd1=Vdd2=Vbias = 3.0V, 25C, unless noted otherwise.
Parameter
800 MHz CDMA
Frequency Range Gain (Fixed Cntl Voltage) (Pout = 28.5 dBm) (Pout = 13 dBm) (Pout = -5 dBm) Power Added Efficiency Pout = 28.5 dBm Pout = 16 dBm Total Supply Current
Units
Min
Typ
Max
Comments
MHz
824
849
dB dB dB
26 28 28
Vcntl = 2.5V Vcntl = 2.5V Vcntl = 2.5V
% % mA
42 8.5 500 100 30
Vcntl = 2.5V Vcntl = 2.5V Pout = 28.5 dBm, Vcntl= 2.5V Pout = 13 dBm, Vcntl= 1.6V Pout = -5 dBm, Vcntl= 1.2V Pout 28.5 dBm Pout 28.5 dBm Pout 28.5 dBm, Vcntl = 2.5V
ACPR @ 0.885 MHz offset ACPR @ 1.98 MHz offset Quiescent Current Input VSWR (Pout = 28.5 dBm) (Pout = 16 dBm) Noise Figure Noise Power @ 45 MHz offset in 869 - 894 MHz Stability (Spurious): Load VSWR 5:1 Harmonic Suppression 2Fo 3Fo
dBc/30 kHz dBc/30 kHz mA
-43 -56 60 2.0:1 2.5:1
dB dBm/Hz dBc
4.5 -141 -50 All phases
dBc dBc
-40 -40
7
Typical Performance, data measured in 50 system, Vdd1=Vdd2=Vbias = 3.0V, Vcntl = 2.5 V, T = 25C and Freq = 836 MHz.
30 45 40 29 35 30 400 500
GAIN (dB)
25 20 15
Idd (mA)
PAE (%)
28
300
27
200
26
10 5
100
25 0 5 10 15 Pout (dBm) 20 25 30
0 0 5 10 15 Pout (dBm) 20 25 30
0 0 5 10 15 Pout (dBm) 20 25 30
Figure 11. Gain vs. Pout.
Figure 12. PAE vs. Pout.
Figure 13. Idd vs. Pout.
-40 -45 -50
-50
-30
HARMONIC SUPPRESSION (dBc)
-55 -60
-40
ACPR1 (dBc)
ACPR2 (dBc)
-55 -60 -65 -70 -75 0 5 10 15 Pout (dBm) 20 25 30
-65 -70 -75 -80 -85 -90 0 5 10 15 Pout (dBm) 20 25 30
-50
-60
-70
2nd 3rd 15 20 Pout (dBm) 25 30
-80 10
Figure 14. ACPR (885 kHz offset) vs. Pout.
Figure 15. ACPR (1.98 MHz offset) vs. Pout.
Figure 16. 2nd/3rd Harmonics vs. Pout.
40
20
GAIN (dB)
0
-20
-40
-60 0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 Vcntl (V)
Figure 17. Gain vs. Vcntl.
8
cdma 2000 1xRTT Characterization System Description
CDMA2000 is the TIA's standard for third generation (3G) technology and is an evolution of the IS-95 CDMA format. CDMA2000 includes 1X RTT in the singlecarrier mode and 3X RTT in the multi-carrier mode. This paper describes the CDMA2000 1X RTT approach and its performance with Agilent 4x4 CDMA PAs, ACPM-7813. CDMA2000 1X RTT, being an extension of the IS-95 standard, has a chip rate of 1.2288Mchip/s. However, in 1xRTT, the reverse link transmits more than one code channel to accommodate the high data rates. The minimum configuration consists of a reverse pilot (R-Pilot) channel for synchronous detection by the Base Transceiver System (BTS) and a reverse fundamental channel (R-FCH) for voice. Additional channels such as the reverse supplemental channels (R-SCHs) and the reverse dedicated channel (R-DCCH) are used to send data or signaling information. Channels can exist at different rates and power levels. Table 1 shows the transmitter specification in CDMA2000 reverse link.
Table 1. Transmitter Specification in Reverse Link.
Specification
ERP at Maximum Output Power Minimum Controlled Output Power Waveform Quality Factor and Frequency Accuracy Spurious Emission at Maximum RF output power offset frequency within the range SR1, Band Class 0(Cellular band) 885 kHz to 1.98 MHz Less stringent of -42 dBc/30 kHz or -54 dBm/1.23 MHz 1.98 MHz to 3.125 MHz Less stringent of -54 dBc/30 kHz or -54 dBm/1.23 MHz 3.125 MHz to 5.625 MHz -13 dBm/100 kHz
Spread Rate1
Lower limit +23 dBm Upper limit +30 dBm -50 dBm/1.23 MHz >0.944 SR1, Band Class1(PCS band) 1.25 MHz to 1.98 MHz Less stringent of -42 dBc/30 kHz or -54 dBm/1.23 MHz 1.98 MHz to 2.25 MHz Less stringent of -50 dBc/30 kHz or -54 dBm/1.23 MHz 2.25 MHz to 6.25 MHz -13 dBm/1 MHz
Typical channel configurations below are based on the transmitter test condition in the reverse link. 1) "Basic" Voice only configuration - R-PICH @ -5.3 dB - R-FCH @ -1.5 dB 9.6 kbps 2) Voice and Data configuration - R-PICH @ -5.3 dB - R-FCH @ -4.54 dB 9.6 kbps - R-SCH1 @ -4.54 dB 9.6 kbps 3) Voice and Control configuration - R-PICH @ -5.3 dB - R-FCH @ -3.85 dB 9.6 kbps - R-DCCH @ -3.85 dB 9.6 kbps 4) Control channel only configuration - R-PICH @ -5.3 dB - R-DCCH @ -1.5 dB 9.6 kbps
9
Combinations of these channels will increase the peak to average power ratio for higher data rates. The complementary cumulative distribution function (CCDF) measurement characterizes the peak to average power statistics of CDMA2000 reverse link. For reference, the system specifications of peak to average power
ratio of IS-95 and CDMA2000 IX RTT are 3.9 dB and 5.4 dB at 1% CCDF respectively. Higher peak to average power ratio requires a higher margin, both in higher power gain and in improved thermal stability for PA linearity to meet the minimum system specifications.
The test results below for the ACPM-7813 show the compliance to the system linearity specifications with 4 channel configurations, representing a broad cross-section of CDMA2000 1X RTT environments.
Test result of ACPM-7813 using CDMA2000 1X RTT signal
Test condition - PA Evaluation board with Vdd1=Vdd2=Vbias = 3.4V, Vcntl = 2.5V, Frequency = 836 MHz. Test result with each channel configuration.
Channel
Basic Voice+Data Voice+Cntl Cntl only
IVdd(mA)
481.0 470.0 481.0 327.0
Pin(dBm)
0.20 0.52 0.68 -2.40
-885 kHz ACPR(dBc)
-56.5 -46.8 -44.9 -53.2
+885 kHz ACPR(dBc)
-56 -47.2 -45.0 -52.9
-1.98 MHz ACPR(dBc)
-68.1 -62.2 -61.8 -66.9
+1.98 MHz ACPR(dBc)
-68.1 -62.1 -61.8 -67.5
Pout(dBm)
28 28 28 25.5
EIA/TIA-98-D indicates a 2.5 dB allowed back off in power for control channel only configuration.
Peak to average power ration (Pout = 16 dBm) CCDF(%)
10 1 0.1 0.01 0.001 0.0001
Basic
1.85 3.25 4.06 4.49 4.68 4.76
Voice + Data
3.07 4.28 5.06 5.55 5.87 5.92
Voice + CNTL
3.10 4.66 5.55 5.97 6.20 6.39
CNTL only
3.76 5.29 6.17 6.58 6.76 6.82
10
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 tradeoff 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-7813 using the PA_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
Battery
Vbias Vdd2 Vdd1 PA Vcntl
To Duplexer
TxIC
Baseband IC
Enable
PA_ON
Switch Circuit for PA
Vcntl
PMIC or LDO
Note: PMIC: Power Management IC LDO: Low Drop Output (Regulator)
11
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 pin.
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
Battery
Vbias Vdd2 Vdd1 PA Vcntl
To Duplexer
TxIC
Baseband IC
Enable
PA_ON R1 C1 PDM1
Switch Circuit for PA
If PDM1 can be controlled then same circuit can be used for Dynamic bias control.
12
3. Dynamic Bias Control Alternate Implementation
Phone designers can use TX_ADC_ADJ pin of the baseband IC to get dynamic bias control with Vcntl pin of PA. TX_ADC_ADJ is a PDM output pin produced by the TX AGC subsystem and used to control
the gain of the Tx signal prior to the PA. The variable output levels from two inverting operational amplifiers, generated and compared by TX_ADC_ADJ, provide dynamic control voltages for the Vcntl of 1.0V ~ 2.7V with a 0.1V step.
Battery
Vbias Vdd2 Vdd1 PA Vcntl
To Duplexer
TxIC
Vcontrol Enable
Baseband IC
PA_ON
R5 R3
_ _ +
Switch Circuit
R1 R2 Vin C1
TX_ADC_ADJ
R4
V1
Av = -(V1/Vin) = -R3/R2, V1 = -(R3/R2)Vin, Vo = -(R5/R4)V1= [(R5*R3)/(R4*R2)]*Vin
The using of combination of two pins, PDM1 and TX_ADC_ADJ, is another method of realizing a dynamic bias control scheme. The two OP Amps control the Vcntl voltage levels with compared and integrated circuits.
Battery
Vbias Vdd2 Vdd1 PA Vcntl
To Duplexer
TxIC
Vcontrol Enable
Baseband IC
PA_ON
_ _ + +
Switch Circuit
TX_ADC_ADJ PDM1
13
ACPR Measurement Method Adjacent-channel power ratio (ACPR) is used to characterize the distortion of power amplifiers and other subsystems for their tendency to cause interference with neighboring radio channels or systems. The ACPR measurement often is specified as the ratio of the power spectral density (PSD) of the CDMA main channel to the PSD measured at
several offset frequencies. For the Cellular band (824 ~ 849 MHz transmitter channel), the two offsets are at 885 kHz and 1.98 MHz and the measurement resolution bandwidth specified is 30 kHz. These offsets are at 1.25 MHz and 1.98 MHz for the PCS band (1850 ~ 1910 MHz transmitter channel).
1.23 MHz 0 -10 -20 30 kHz -30 -40 -50 -60 -70 -80 2nd ACPR-L = 1.98 MHz 2nd ACPR-U = 1.98 MHz 30 kHz 1st ACPR-L 1st ACPR-U 30 kHz 30 kHz 2nd ACPR (dBc) 1st ACPR (dBc)
Offset frequency
FREQUENCY (MHz) Figure 18. CDMA Adjacent-Channel Power Ratio Measurement.
14
ACPR Testing Diagram Test
PA Test Setup
DC Power Supply
CH1 CH2 CH3 CH4
8593E Spectrum Analyzer
Vcntl Vdd1
Vbias
Vdd2
Power Divider E4406A VSA Transmitter Tester
20 dB Attenuator
CDMA PA ACPM-7813
3 dB Attenuator
E4437B CDMA Signal Generator
Figure 19. ACPR test equipment setup.
ACPM-7813 Test Result using VSA Transmitter Tester
Figure 20. ACPR measurement using VSA Transmitter tester.
15
ACPR Test Results using Spectrum Analyzer
REF 42.8 dBm AT 30 dB Mkr 836 MHz 35.42 dBm
RBW = 1.0 MHz
RBW = 300 kHz
RBW = 30 kHz
Center 836 MHz
VBW 100 kHz
Span 5.000 MHz SWP 2.00 sec
Figure 21. Example ACPR measurement using Spectrum Analyzer.
The meaning of 16 dB The accurate ACPR measurement using Spectrum Analyzer needs to consider the normalization factor that is dependent on the Resolution Bandwidth, RBW, settings. The above figure (measurement shown at 836 MHz for general example) shows a comparison of the different ACPR measurement results as a function of various RBW values. As the RBW is reduced, less power is captured during the measurement and consequently the channel power is recorded as a
smaller value. For example, if the main channel power is measured as 28 dBm in a 1.23 MHz bandwidth, its power spectral density is 28 dBm/1.23 MHz, which can be normalized to 11.87 dBm/ 30 kHz. The equation used to calculate the normalization factor of power spectral density is: Normalization Factor =
10log[Normalization BW/Current BW (Spectrum Analyzer RBW)] = 10log[1.23X106/30X103] = 16.13 dB
Since the ACPR in an IS95 system is specified in a 1.23 MHz bandwidth, a channel power that is measured using a different RBW, can be normalized to reflect the channel power as if it was measured in a 1.23 MHz bandwidth. The difference in channel power measured in 30 kHz bandwidth and the channel power measured in a 1.23 MHz bandwidth is 16 dB.
16
ACPM-7813 Demoboard Operation Instructions
1) Module Description
GND GND RF Out RFout GND GND Vdd2 2.2 F Vdd2 4700 pF Vdd1 470 pF 2.2 F Vdd1 Vbias 4700 pF Vcntl 470 pF GND RFin Vcntl RFin Vbias
The ACPM-7813 is a fully matched Power Amplifier. The sample devices are provided on a demonstration PC Board with SMA connectors for RF inputs and outputs, and a DC connector for all bias and control I/O's. Please refer to Figures 22 through 25 and the Pin configuration table for I/O descriptions and connections.
Figure 22. ACPM-7813 Evaluation Board Schematic and Layout.
GND
Vdd1
GND
Vbias
Vdd2
800 MHz
C1 RF in C2 RF out
C3
C4
C5
C6
C1 = 4700 pF C2 = 470 pF C3 = 470 pF C4 = 4700 pF C5 = 2.2 F C6 = 2.2 F
Figure 23. Layer 1 - Top Metal & Solder Mask.
17
Figure 24. Layer 2 - Ground.
Figure 25. Layer 3 - Bottom Metal & Solder Mask.
PIN Configuration Table
Top side
1 2 3 4 5 GND Vdd1 Vbias GND Vdd2
Back side
1b Vdd2 (s) 2b GND 3b Vbias (s) 4b Vcntl 5b Vdd1 (s)
18
2) Circuit Operation
5) Testing
The design of the power module (PAM) provide bias control via Vcntl to achieve optimal RF performance and power control. The control pin is labeled Vref (Vcntl). Please refer to Figure 26 for the block diagram of this PAM. Typical Operation Conditions (Vdd1=Vdd2=Vbias = 3.0V)
Parameter
Frequency Range Output Power Vcntl
- Signal Source The CDMA modulated signal for the test is generated using an Agilent ESG-D4000A (or ESGD3000A) Digital Signal Generator with the following settings: CDMA Setup : Reverse Spreading: On Bits/Symbol: 1 Data: PN15 Modulation: OQPSK Chip Rate: 1.2288 Mcps High Crest: On Filter: Std Phase Polarity: Invert - ACPR Measurement The ACPR (and channel power) is measured using an Agilent 4406 VSA with corresponding ACPR offsets for IS-98c and JSTD-8. Averaging of 10 is used for ACPR measurements. - DC Connection A DC Connector is provided to allow ease of connection to the I/O's. Wires can be soldered to the connector pins, or the connector can be removed and I/O's contacted via clip leads or direct soldered connections. The wiring of I/O's are listed in Figure 1 through 3 and Pin
configuration table. The Vdd sense connections are provided to allow the use of remotesensing power supplies for compensation of PCB traces and cable resistance. - Device Operation 1) Connect RF Input and Output for the band under test. 2) Terminate all unused RF ports into 50 Ohms. 3) Connect Vdd1 and Vdd2 supplies (including remote sensing labeled Vdd1 S and Vdd2 S on the board). Nominal voltage is 3.4V. 4) Connect Vcntl supply and set reference voltage to the voltage shown in the data packet. Note that the Vcntl pin is on the back side of the demonstration board. Please limit Vcntl to not exceed the corresponding listed "DC Biasing Condition" in the Data Packet. Note that increasing Vcntl over the corresponding listed "DC Biasing Condition" can result in power decrease and current can exceed the rated limit. 5) Apply RF input power according to the values listed in "Operation Data" in Data Packet. 6) Power down in opposite sequence.
ACPM-7813
824 - 849 MHz 28.5 dBm 2.5 V
3) Maximum Ratings
Vdd Drain Current Vcntl RF input Temperature 5.0V 1.5A 3V 10 dBm -30 to 85C
Please Note: Avoid Electrostatic Discharge on all I/O's. 4) Heat Sinking
The demonstration PC Board provides an adequate heat sink. Maximum device dissipation should be kept below 2.5 Watts.
Vdd1
Vbias
Vdd2
Bias Circuit Passive Input Match On Chip Inter-stage Match Passive Output Match
Input
Output
Vcntl
Figure 26. Power Module Block Diagram.
Single control bias setting for low Idq and 40% PAE at Pout = 28.5 dBm
19
IR Reflow Soldering Figure 27 is a straight-line representation of the recommended nominal time-temperature profile from JESD22-A113-B IR reflow.
235 200 183 150 60 to 150s above 183C
TEMPERATURE (C)
100
50
0
30 Preheat Zone
60
90 Soak Zone
120
150 180 TIME (seconds) Reflow Zone
210
240
270 Cooling Zone
300
Figure 27. Time-temperature Profile for IR Reflow Soldering Process.
Table 2. IR Reflow Process Zone.
Process Zone
Preheat Zone Soak Zone Reflow Zone Cooling Zone
Temperature
25C to 100C 100C to 150C 150C to 235C (240C MAX) 235C to 150C 150C to 25C
Temperature/Time
3C/s MAX 0.5C/s MAX (120s MAX) 4.5C/s TYP -4.5C/s TYP -6C/s MAX
Table 3. Classification Reflow Profiles.
Convection or IR/Convection
Average ramp-up rate (183C to peak) Preheat temperature 125 ( 25)C Temperature maintained above 183C Time within 5C of actual peak temperature Peak temperature range Ramp-down rate Time 25C to peak temperature 3C/second max. 120 seconds max. 60 - 150 seconds 10 - 20 seconds 220 +5/-0C or 235 +5/-0C 6C/second max. 6 minutes max.
Note: All temperatures measured refer to the package body surface.
20
Zone 1 - Preheat Zone The average heat up rate for surface-mount component on PCB shall be less than 3C/ second to allow even heating for both the component and PCB. This ramp is maintained until it reaches 100C where flux activation starts. Zone 2 - Soak Zone The flux is being activated here to prepare for even and smooth solder joint in subsequent zone. The temperature ramp is kept gradual to minimize thermal mismatch between solder, PC Board and components. Overramp rate here can cause solder splatter due to excessive oxidation of paste. Zone 3 - Reflow Zone The third process zone is the solder reflow zone. The temperature in this zone rises rapidly from 183C to peak temperature of 235C for the solder to trans-
form its phase from solid to liquids. The dwell time at melting point 183C shall maintain at between 60 to 150 seconds. Upon the duration of 10-20 seconds at peak temperature, it is then cooled down rapidly to allow the solder to freeze and form solid. Extended duration above the solder melting point can potentially damage temperature sensitive components and result in excessive inter-metallic growth that causes brittle solder joint, weak and unreliable connections. It can lead to unnecessary damage to the PC Board and discoloration to component's leads. Zone 4 - Cooling Zone The temperature ramp down rate is 6C/second maximum. It is important to control the cooling rate as fast as possible in order to achieve the smaller grain size for solder and increase fatigue resistance of solder joint.
Solder Paste The recommended solder paste is type Sn6337A or Sn60Pb40A of J-STD-006.
Note: Solder paste storage and shelf life shall be in accordance with manufacturer's specifications.
Stencil or Screen The solder paste may be deposited onto PCB by either screen printing, using a stencil or syringe dispensing. The recommended stencil thickness is in accordance to JESD22-B102-C.
Nominal stencil thickness
0.102 mm (0.004 in) 0.152 mm (0.006 in) 0.203 mm (0.008 in)
Component lead pitch
Lead pitch less than 0.508 mm (0.020 in) 0.508 mm to 0.635 mm (0.02 in to 0.025 in) Lead pitch greater than 0.635 mm (0.025 in)
www.agilent.com/semiconductors
For product information and a complete list of distributors, please go to our web site. For technical assistance call: Americas/Canada: +1 (800) 235-0312 or (916) 788-6763 Europe: +49 (0) 6441 92460 China: 10800 650 0017 Hong Kong: (65) 6756 2394 India, Australia, New Zealand: (65) 6755 1939 Japan: (+81 3) 3335-8152(Domestic/International), or 0120-61-1280(Domestic Only) Korea: (65) 6755 1989 Singapore, Malaysia, Vietnam, Thailand, Philippines, Indonesia: (65) 6755 2044 Taiwan: (65) 6755 1843 Data subject to change. Copyright (c) 2004 Agilent Technologies, Inc. Obsoletes 5989-0404EN November 10, 2004 5989-1900EN

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