ETC HPMX-7202

Agilent HPMX-7202
Dual-Band, Tri-Mode
Upconverter/Driver Amplifier
Data Sheet
Features
• Dual-Band, Tri-mode operation
• High output power to directly drive
a power amplifier
• 30 dB gain control range on CDMA
drivers
• Adaptive biasing on CDMA driver
to maximize efficiency
General Description
The HPMX-7202 offers a highly
integrated solution for CDMA/FM
Dual-Band, Tri-Mode (DBTM)
hand sets. On the two CDMA
chains, it contains an upconverter
and RF variable gain driver. On the
AMPS chain, it contains an
upconverter and a driver amplifier.
Internal circuitry is used to move
between modes.
The IC operates from a 3V regulated supply, making it ideal for
use with a single cell Lithium Ion
battery. The Drivers can be
directly powered from the battery
for enhanced performance. The
power down function reduces the
supply current to 1 µA, typical, to
support gated operation and
eliminate the need for a power
supply switch.
The CDMA transmit chains
provide excellent Adjacent
Channel Power Rejection and a
low noise floor for compliance
with TIA98-C requirements. The
CDMA driver has a high output
power for direct interfacing with
CDMA Power amplifiers. The
driver is adaptively biased to
reduce current consumption and
extend battery life.
The HPMX-7202 is fabricated
using a 40 GHz Fmax silicon
bipolar process and is packaged in
a 5 x 5 mm 32 pin TQFP package.
Applications
• CDMA1900/CDMA cellular/AMPS
handsets
5x5 mm TQFP-32 Package
Package Pin Configuration
• 56 mA average supply current
(CDG suburban user model)
• 2.7 to 3.6 V operation
• ACPR compliant
• Low output noise power
• Power down capability
pwrDn
VccBat
Band
VccBat
Gnd
RFTxAgc
Vcc
CellMixOutP
• JEDEC standard TQFP-32 surface
mount package
32
25
1
24
CellMixOutM
Mode
Gnd
Gnd
CellDrvIn
CellDrvOut
Gnd
Gnd
HPMX-7202
PCSDrvIn
Gnd
Gnd
PCSDrvOut
YY WW
PCSMixOutM
Gnd
PCSMixOutP
Gnd
8
17
VccBat
CellLO
LOGnd
PCSLO
Vcc
Gnd
IFInP
16
IFInM
9
HPMX-7202 Absolute Maximum Ratings [1]
Parameter
Min.
Max.
Units
Supply Voltage
4.5
V
Battery Supply Voltage
4.5
V
Junction Temperature
150
°C
Case Temperature
125
°C
125
°C
Input Power at ifIn (IFInP, IFInM)
15
dBm
Input Power at PCSDrvIn
15
dBm
Input Power at CellDrvIn
15
dBm
Input Power at LoIn
15
dBm
Storage Temperature
-55
Thermal Resistance:[2]
θjc = 108°C/W
Notes:
1. Operation of this device in excess of any of
these parameters may cause permanent
damage.
2. TJUNCTION = 150°C
3. This product is ESD sensitive. Handle with
care to avoid static discharge.
Human Body Model
Class 1
Machine Model
Class A
Charge Device Model Class A
See Reliability Bulletin for more information.
HPMX-7202 Recommended Operating Conditions
Vcc = 2.7 to 3.6V
VccBat = 2.7 to 4.2V; VccBat ≥ Vcc
Tambient = -40°C to 85°C
IF Frequency (both bands): 130 MHz typically
PCS Output Frequency: 1850 to 1910 MHz
PCS Local Oscillator Frequency: 1720 to 1780 MHz for low side LO
Cellular Band Output Frequency: 824 to 849 MHz
Cellular Band Local Oscillator Frequency: 954 to 979 MHz for high side LO
HPMX-7202 Standard Test Conditions
Unless otherwise noted, all test data was taken on packaged parts under the following conditions. The test circuit is shown in Figure 47.
RF powers are into 50Ω unless specified otherwise.
Vcc=3.0V, VccBat = 3.6V, Tambient = 25°C
IF input frequency at IFInP, IFInM is 130 MHz. IF differential input voltage, Vif-in, 480 mVp-p across a matched 470Ω differential impedance (240 mVp-p
at IFInP and IFInM, with a single ended impedance of 235Ω). This input level is calculated from a 50Ω power source delivering –12 dBm to a 9.4:1
impedance transforming network. The test circuit for this input is represented by components C6, C9, L19 and X1 on Figure 47.
PCS CDMA LO input at PCSLO: 1750 MHz at –11dBm, single ended
PCS CDMA RF frequency at PCSMixOutM, PCSMixOutP, PCSDrvIn, PCSDrvOut: 1880 MHz, matched to 50Ω.
Cellular AMPS LO input at CellLO: 966 MHz at -11dBm, single ended
Cellular CDMA LO input at CellLO: 966 MHz at -11dBm, single ended
Cellular RF frequency at CellMixOutM, CellMixOutP, CellDrvIn, CellDrvOut: 836 MHz, matched to 50Ω.
PCSDrvIn
PCSMixOutM
PCSMixOutP
Functional Block Diagram
IFlnM
IFlnP
PCSDrvOut
CellDrvOut
2
CellDrvIn
CellLO
CellMixOutM
RFTxAgc
CellMixOutP
PCSLO
pwrDn
Mode
Band
DC Specifications for Logical Signals
Symbol
Parameters and Test Conditions
VIL_MAX
VIL Input Logic Low Voltage [1]
VIH_MIN
VIH Input Logic High Voltage
Min.
Typ.
Max.
Units
0.5
V
2.5
V
Supply current from Vcc when pwrDn = VIL_MAX
1
15
µA
Supply current from VccBat when pwrDn = VIL_MAX
1
15
µA
Note:
1. An additional 25 µA is drawn from the modem chip when VRFTxAgc = 3.0V. This voltage should be set to 0 V when pwrDn ≤ VIL-MAX.
PCS CDMA Upconverter
Symbol
Parameters and Test Conditions
Icc
Current Consumption
( Vif-In = 480 mVp-p [1] )
Min.
Max.
Units
24
28
mA
Pout
Output Power
ACPR
Adjacent Channel Power Ratio at PCSMixOut = -9 dBm (1.25 MHz offset)
Cg
Conversion Power Gain[1]
4
dB
OP1dB
Output 1 dB gain compression point
-1.5
dBm
OIP3
Output 3rd Order Intercept Point
11
dBm
Rx Noise
Rx band Noise
FPCSMixOut = 1880 MHz, Fnoise-test = 1960 MHz at Pout = -9 dBm
-154
dBm/Hz
Differential Impedance of IF port in PCS mode
160-j225
Ω
LO port to RF port leakage
ZIF
-9
Typ.
-7
-66
dBm
-58
dBc/30 kHz
-30
dBm
(Vif-In = 480 mVp-p [1] )
-90
dBm
RF signal present at LO port (Vif-In = 480 mVp-p [1] )
-66
dBm
2x LO out at RF port
-22
dBm
3x LO out at RF port
-39
dBm
Other Spurious emissions at RF port: (LO ±3 IF)
-50
dBm
IF signal present at LO port
Note:
1. This input level is calculated from the input power delivered to a test circuit with measured loss as specified in the Standard Test Conditions. If an
additional resistance is added across the IFInP and IFInM pins (to set the IF filter terminating impedance) the input voltage for a fixed input power
will be reduced. To maintain this input voltage in this case, the input power to the IF port must be increased, resulting in an apparent decrease in
power gain.
3
PCS CDMA Variable Gain Amplifier
Symbol
Parameters and Test Conditions
Min.
IccBat
Battery Current Consumption
RFTxAgc = 0.3 V
RFTxAgc = 2.7 V
Gain
Gain
RFTxAgc = 0.3 V
RFTxAgc = 2.7 V
22
Typ.
Max.
Units
22
70
32
82
mA
mA
-10
25
-8
dB
dB
-52
dBc/30 kHz
ACPR
Adjacent Channel Power Ratio
Pout = +9dBm
-58
OP1dB
Output 1dB gain compression point
RFTxAgc = 2.7V
14
dBm
Rx Noise
Rx band Noise
RFTxAgc = 2.7V
FPCSMixOut = 1880 MHz, Fnoise-test = 1960 MHz at Pout = +9 dBm
-144
dBm/Hz
Note:
2. The PCS CDMA VGA features adaptive biasing such that the supply current (from VccBat) will vary with RFTxAgc voltage. Please see the Typical
Performance Graphs for more information on the VGA operation.
Cellular CDMA Upconverter
Symbol
Parameters and Test Conditions
Icc
Current Consumption
Vif-In = 480 mVp-p [3]
Min.
-9
Typ.
Max.
Units
23
26
mA
Pout
Output Power
-8
dBm
ACPR
Adjacent Channel Power Ratio
at CellMixOut = -9 dBm (885 kHz offset)
-62
Cg
Conversion Power Gain
3.8
dB
OP1dB
Output 1dB gain compression point
-1.5
dBm
OIP3
Output 3rd Order Intercept Point
10
dBm
Rx Noise
Rx band Noise
FCellMixOut = 835 MHz, Fnoise-test = 880 MHz at PCellMixOut = -9 dBm
-154
dBm/Hz
ZIF
Differential Impedance of IF port in Cellular CDMA mode
164-j221
Ω
LO port to RF port leakage
-33
dBm
-58
dBc/30 kHz
IF signal present at LO port
(Vif-In = 480 mVp-p[3] )
-82
dBm
RF signal present at LO port
(Vif-In = 480 mVp-p[3] )
-56
dBm
2x LO out at RF port
-29
dBm
3x LO out at RF port
-48
dBm
Other Spurious emissions at RF port: (LO ±3 IF)
-55
dBm
Note:
3. This input level is calculated from the input power delivered to a test circuit with measured loss as specified in the Standard Test Conditions. If an
additional resistance is added across the IFInP and IFInM pins (to set the IF filter terminating impedance) the input voltage for a fixed input power
will be reduced. To maintain this input voltage in this case, the input power to the IF port must be increased, resulting in an apparent decrease in
power gain.
4
Cellular CDMA Variable Gain Amplifier
Symbol
Parameters and Test Conditions
Min.
IccBat
Battery Current Consumption
RFTxAgc = 0.3 V
RFTxAgc = 2.7 V
Gain
Gain
RFTxAgc = 0.3 V
RFTxAgc = 2.7 V
22
Typ.
Max.
Units
22
67
32
84
mA
mA
-14
26
-8
dB
dB
-52
dBc/30 kHz
ACPR
Adjacent Channel Power Ratio
(885 kHz offset)
Pout = +7dBm
-55
OP1dB
Output 1dB gain compression point
RFTxAgc = 2.7 V
13
dBm
Rx Noise
Rx band Noise
RFTxAgc = 2.7 V
FCellDrvOut = 835 MHz, Fnoise-test = 880 MHz at PCellDrvOut = +9 dBm
-140
dBm/Hz
Note:
4. The Cellular CDMA VGA features adaptive biasing such that the supply current (from VccBat) will vary with RFTxAgc voltage. Please see the
Typical Performance Graphs for more information on the VGA operation.
Cellular AMPS Upconverter
Symbol
Parameters and Test Conditions
Icc
Current consumption
Pout
Output power Vin=480 mVp-p[5]
ZIF
FMnoise
Min.
Max.
Units
16
22
mA
-5.0
dBm
Differential Impedance of IF port in AMPS mode
153-j199
Ω
Rx band Noise
FampsMixOut = 835 MHz, Fnoise-test = 880 MHz at PampsMixOut = -6dBm
-148
dBm/Hz
LO port to RF port leakage
-41
dBm
-84
dBm
IF signal present at LO port
(Vin = 480 mVp-p [5] )
RF signal present at LO port
(Vin = 480 mVp-p [5] )
-5.5
Typ.
-54
dBm
2x LO out at RF port
-40
dBm
3x LO out at RF port
-59
dBm
Other Spurious emissions at RF port: (LO ±2 IF)
-20
dBm
Other Spurious emissions at RF port: (LO ±3 IF)
-50
dBm
Note:
5. This input level is calculated from the input power delivered to a test circuit with measured loss as specified in the Standard Test Conditions. If an
additional resistance is added across the IFInP and IFInM pins (to set the IF filter terminating impedance) the input voltage for a fixed input power
will be reduced. To maintain this input voltage in this case, the input power to the IF port must be increased, resulting in an apparent decrease in
power gain.
Cellular AMPS Driver
Symbol
Parameters and Test Conditions
IccBat
Battery Current Consumption
SSGain
Small Signal Gain, Pin = -25 dBm
16
19
dB
Pout
Output Power at Pin = -8.5 dBm
9
9.5
dBm
OP1dB
Output 1dB gain compression point
6.6
dBm
Noise
Rx band Noise FCellDrvOut = 835 MHz,
Fnoise-test = 880 MHz at Pout = +9 dBm
-133
dBm/Hz
5
Min.
Typ.
Max.
Units
28
38
mA
Table 1. HPMX-7202 Pin Description
No.
Name
Description
Functionality
1
CellMixOutM
AMPS and CDMA Cellular
mixer differential outputs
Open collector outputs of both the AMPS and CDMA cellular upconverters.
Upconverter selection controlled by mode switch. Impedance matching required.
Connection to Vcc is required via a bias decoupling network. If a single ended
output is required from CellMixOutM, then CellMixOutP needs to be biased to Vcc and
RF terminated.
2
Gnd
Ground
3
CellDrvIn
Cellular amplifier input
4
Gnd
Ground
5
PCSDrvIn
PCS amplifier input
6
Gnd
Ground
7
PCSMixOutM
PCS mixer differential output
Open collector output of PCS upconverter. Impedance matching required. Connection
to Vcc is required through a bias decoupling network. If single ended output is
required from PCSMixOutM, PCSMixOutP needs to be biased to Vcc and RF
terminated.
8
PCSMixOutP
PCS mixer differential output
Open collector output of PCS upconverter. Impedance matching required. Connection
to Vcc is required through a bias decoupling network. If single ended output is
required from PCSMixOutP, PCSMixOutM needs to be biased to Vcc and RF
terminated.
9
IFInP
IF differential input
IF differential input with nominal input impedance of 470Ω differential. Consult the
applications section for information on driving the IF port from a single ended 50Ω
source.
10
IFInM
IF differential input
IF differential input. See IFInP (Pin 9).
11
Gnd
Ground
12
Vcc
Regulated DC Voltage
connection
Regulated Vcc connection to IC mixer circuits, separated from amplifier supply
voltage to avoid non-linear mixer effects due to supply coupling.
13
PCSLO
PCS LO input
Requires external AC coupling and impedance match to 50Ω.
14
LOGnd
LO input ground
Common LO ground return for both PCS and cellular. A DC bias is present on this pin,
therefore grounding requires AC coupling.
15
CellLO
Cellular LO input
Requires external AC coupling and impedance match to 50Ω.
16
VccBat
Battery connection
Amplifier DC supply voltage pin. This supply can be connected directly to the
unregulated battery voltage. External decoupling capacitors are typically required.
17
Gnd
Ground
18
Gnd
Ground
19
PCSDrvOut
PCS Amplifier output
20
Gnd
Ground
21
Gnd
Ground
22
CellDrvOut
Cellular AMPS/CDMA
Amplifier output
23
Gnd
Ground
24
Mode
Mode select
6
RF input to cellular band (CDMA and AMPS) amplifier. A DC bias is present on this pin,
therefore a DC blocking capacitor is required. A matching circuit is required for
operation from a 50Ω source impedance.
RF input to PCS amplifier. A DC bias is present on this pin, therefore a DC blocking
capacitor is required.
RF output from PCS amplifier stage. Impedance matching required. An external
connection to VccBat is required through a bias decoupling network.
RF output from amplifier. Impedance matching required. An external connection to
VccBat is required through a bias decoupling network.
Toggles cellular modes between CDMA and AMPS. A logic low places the HPMX-7202
in the cellular AMPS mode while a logic high places the HPMX-7202 in the CDMA
mode for both cellular and PCS.
Table 1. HPMX-7202 Pin Description, continued
25
pwrDn
Power Down
DC input, a logic low will power down the HPMX-7202, a logic high turns the IC on.
This input controls the bias cell of the HPMX-7202, allowing it to shutdown all sections
of the chip regardless of which Vcc supply (Vcc or VccBat) the section uses. At a
logic high, this pin draws less than 30µA. At a logic low level this pin sources less than
1µA typically.
26
VccBat
Battery connection
Amplifier DC supply voltage pin. This supply can be connected directly to the
unregulated battery voltage. External decoupling capacitors are typically required.
27
Band
Band select
Toggles between cellular and PCS bands. A logic low places the HPMX-7202 in the
cellular band while a logic high places the HPMX-7202 in the PCS band.
28
VccBat
Battery connection
Amplifier DC supply voltage pin. This supply can be connected directly to the
unregulated battery voltage. External decoupling capacitors are typically required.
29
Gnd
Ground
30
RFTxAgc
CDMA Tx VGA
gain control voltage
DC input. Controls CDMA amplifier gain and bias current for both Cellular and PCS.
Minimum gain occurs at RFTxAgc = 0 V and maximum gain occurs at RFTxAgc = 3 V.
See typical performance graphs for more information. This pin appears as a 100 kΩ
resistance to ground. If this pin is connected to a Pulse Density Modulated signal
(PDM) an external discrete filter is needed to generate the gain control voltage input.
31
Vcc
Regulated DC Voltage
connection
Regulated Vcc connection to IC mixer circuits, separated from amplifier supply
voltage to avoid non-linear mixer effects due to supply coupling.
32
CellMixOutP
AMPS and CDMA Cellular
mixer differential output
Open collector outputs of AMPS and CDMA cellular upconverters. Upconverter
selection controlled by mode switch. Impedance matching required. Connection to
Vcc is required through a bias de-coupling network. If a single ended output is
required from CellMixOutP, then CellMixOutM needs to be biased to Vcc and RF
terminated.
7
HPMX-7202 Typical Performance Graphs
Vcc = 3 V, VccBat = 3.6 V, Plo = -11 dBm, Vif-in = 480 mVp-p, unless otherwise stated
30
28
Vcc = 2.7 V
Vcc = 3 V
Vcc = 3.6 V
26
22
22
20
20
-40
-20
0
20
40
60
TEMPERATURE (°C)
0
60
-9
-40
80
-8
20
40
60
-13
-11
-9
-22
-15
-7
-10
Pout (dBm)
ACPR (dBc/30 kHz)
-67
-62
-63
-11
-9
-7
Plo (dBm)
Figure 7. PCS CDMA Upconverter ACPR vs.
LO Power and Frequency.
-7
-40°C
25°C
85°C
-20
-30
-40
-64
-13
-9
0
-61
-66
-11
Figure 6. Cellular CDMA Upconverter
Output Power vs. LO Power and Vcc.
824 MHz
837 MHz
849 MHz
Pout = -9 dBm
-65
-68
-15
-13
Plo (dBm)
-60
-64
Vcc = 2.7 V
Vcc = 3 V
Vcc = 3.6 V
-21.5
Figure 5. PCS CDMA Upconverter Output
Power vs. LO Power and Vcc.
1850 MHz
1880 MHz
1910 MHz
Pout = -9 dBm
80
-21
Plo (dBm)
-63
60
Pin = -25 dBm
-20
TEMPERATURE (°C)
Figure 4. Cellular CDMA Upconverter Output
Power vs. Temperature and Vcc.
40
-20.5
-21
-15
80
20
-20
-20.5
0
0
Figure 3. PCS CDMA Upconverter Output
Power vs. Temperature and Vcc.
Pout (dBm)
-7
-20
-20
TEMPERATURE (°C)
-19.5
-10
-40
ACPR (dBc/30 kHz)
40
Vcc = 2.7 V
Vcc = 3 V
Vcc = 3.6 V
Pin = -25 dBm
-9
8
20
-19
Vcc = 2.7 V
Vcc = 3 V
Vcc = 3.6 V
Pout (dBm)
Pout (dBm)
-20
Figure 2. Cellular CDMA Upconverter Icc
vs. Temperature and Vcc.
-5
-6
-7
TEMPERATURE (°C)
Figure 1. PCS CDMA Upconverter Icc vs.
Temperature and Vcc.
Pin = -12 dBm
-6
-8
18
-40
80
-5
24
24
Vcc = 2.7 V
Vcc = 3 V
Vcc = 3.6 V
Pin = -12 dBm
Pout (dBm)
26
Icc (mA)
Icc (mA)
28
-4
Vcc = 2.7 V
Vcc = 3 V
Vcc = 3.6 V
-65
-15
-50
-60
-13
-11
-9
-7
Plo (dBm)
Figure 8. Cellular CDMA Upconverter ACPR
vs. LO Power and Frequency.
L-3
L-2
L-1
L
L+1
L+2
L+3
SIGNAL ID (LO ± n * IF)
Figure 9. PCS CDMA Upconverter Output
Spectrum vs. Temperature.
HPMX-7202 Typical Performance Graphs , continued
Vcc = 3 V, VccBat = 3.6 V, Plo = -11 dBm, Vif-in = 480 mVp-p, unless otherwise stated
0
80
-40°C
25°C
85°C
70
-40
-50
60
IccBat (mA)
-30
50
40
L-3
40
30
30
20
20
L-2
L-1
L
L+1
L+2
L+3
10
0
1
SIGNAL ID (LO ± n * IF)
2
3
0
30
85°C
25°C
-40°C
70
85°C
25°C
-40°C
20
50
40
GAIN (dB)
60
IccBat (mA)
60
3
Figure 12. Cellular CDMA Driver IccBat vs.
V(RFTxAgc) and VccBat.
80
85°C
25°C
-40°C
2
VRFTxAgc (V)
Figure 11. PCS CDMA Driver IccBat vs.
V(RFTxAgc) and VccBat.
80
70
1
VRFTxAgc (V)
Figure 10. Cellular CDMA Upconverter Output
Spectrum vs. Temperature.
IccBat (mA)
50
10
-60
VccBat = 3.3 V
VccBat = 3.6 V
VccBat = 4.2 V
70
60
-20
IccBat (mA)
Pout (dBm)
-10
80
VccBat = 3.3 V
VccBat = 3.6 V
VccBat = 4.2 V
50
40
30
30
20
20
10
0
-10
10
10
0
1
2
3
-20
0
1
VRFTxAgc (V)
0
-10
10
0
-10
-20
1
2
VRFTxAgc (V)
Figure 16. Cellular CDMA Driver Gain vs.
V(RFTxAgc) and Temperature.
3
10
0
-10
-20
0
VccBat = 3.3 V
VccBat = 3.6 V
VccBat = 4.2 V
20
GAIN (dB)
GAIN (dB)
0
3
30
VccBat = 3.3 V
VccBat = 3.6 V
VccBat = 4.2 V
20
10
2
Figure 15. PCS CDMA Driver Gain vs.
V(RFTxAgc) and Temperature.
30
85°C
25°C
-40°C
20
1
VRFTxAgc (V)
Figure 14. Cellular CDMA Driver IccBat vs.
V(RFTxAgc) and Temperature.
30
GAIN (dB)
3
VRFTxAgc (V)
Figure 13. PCS CDMA Driver IccBat vs.
V(RFTxAgc) and Temperature.
9
2
-20
0
1
2
VRFTxAgc (V)
Figure 17. PCS CDMA Driver Gain vs.
V(RFTxAgc) and VccBat.
3
0
1
2
VRFTxAgc (V)
Figure 18. Cellular CDMA Driver Gain vs.
V(RFTxAgc) and VccBat.
3
-30
-30
-40
-40
-40
-50
-60
0V
0.5 V
1V
1.5 V
1.7 V
1.9 V
2.1 V
2.2 V
2.7 V
3V
-70
-80
-90
-60
-50
-60
0V
0.5 V
1V
1.5 V
1.7 V
1.9 V
2.1 V
2.2 V
2.7 V
3V
-70
-80
-40
-20
0
-90
-60
20
-50
-60
-70
-80
-40
Pout (dBm)
-20
0
-90
-60
20
Figure 20. PCS ACPR vs. Output Power and
V(RFTxAgc). Temp = +25°C
-40
-40
0V
0.5 V
1V
1.5 V
1.7 V
1.9 V
2.1 V
2.2 V
2.7 V
3V
-80
-90
-60
-50
0V
0.5 V
1V
1.5 V
1.7 V
1.9 V
2.1 V
2.2 V
2.3 V
2.7 V
3V
-60
-70
-80
-40
-20
0
-90
-60
20
ACPR (dBc/30 kHz)
-40
ACPR (dBc/30 kHz)
-30
-50
0
20
-50
-60
-70
-80
-40
-20
Figure 21. PCS ACPR vs. Output Power and
V(RFTxAgc). Temp = +85°C
-30
-70
-40
Pout (dBm)
-30
-60
0V
0.5 V
1V
1.5 V
1.7 V
1.9 V
2.1 V
2.2 V
2.3 V
2.7 V
3V
Pout (dBm)
Figure 19. PCS ACPR vs. Output Power and
V(RFTxAgc). Temp = -40°C
ACPR (dBc/30 kHz)
ACPR (dBc/30 kHz)
-30
ACPR (dBc/30 kHz)
ACPR (dBc/30 kHz)
HPMX-7202 Typical Performance Graphs , continued
Vcc = 3 V, VccBat = 3.6 V, Plo = -11 dBm, Vif-in = 480 mVp-p, unless otherwise stated
-20
0
-90
-60
20
0V
0.5 V
1V
1.5 V
1.7 V
1.9 V
2.1 V
2.2 V
2.3 V
2.7 V
3V
-40
-20
0
20
Pout (dBm)
Pout (dBm)
Pout (dBm)
Figure 22. Cellular ACPR vs. Output Power and
V(RFTxAgc). Temp = -40°C
Figure 23. Cellular ACPR vs. Output Power and
V(RFTxAgc). Temp = +25°C
Figure 24. Cellular ACPR vs. Output Power and
V(RFTxAgc). Temp = +85°C
-140
-140
18
-150
-155
Icc (mA)
-145
NFL (dBm/Hz)
NFL (dBm/Hz)
-145
20
-150
Vcc = 2.7 V
Vcc = 3 V
Vcc = 3.6 V
16
14
-155
12
-160
1.5
1.7
1.9
2.1
2.3
2.5
2.7
2.9
VRFTxAgc (V)
Figure 25. PCS CDMA Driver Rx Band Noise
Floor vs. V(RFTxAgc).
10
-160
1.5
1.7
1.9
2.1
2.3
2.5
2.7
2.9
VRFTxAgc (V)
Figure 26. Cellular CDMA Driver Rx Band
Noise Floor vs. V(RFTxAgc).
10
-40
10
60
TEMPERATURE (°C)
Figure 27. AMPS Upconverter Icc vs.
Temperature and Vcc.
HPMX-7202 Typical Performance Graphs , continued
Vcc = 3 V, VccBat = 3.6 V, Plo = -11 dBm, Vif-in = 480 mVp-p, unless otherwise stated
0
35
Vcc = 2.7 V
Vcc = 3 V
Vcc = 3.6 V
Pin = -12 dBm
-4
-6
-8
-4
-6
10
-10
-15
60
-13
-11
VccBat = 3.3 V
VccBat = 3.6 V
VccBat = 4.2 V
0P3dB (dBm)
13
16
14
85°C
25°C
-40°C
12
829
834
839
844
11
9
7
849
FREQUENCY (MHz)
Figure 31. AMPS Driver Gain vs. Frequency
and Temperature.
5
-40
29
-20
0
20
25
-40
-20
0
20
40
60
TEMPERATURE (°C)
15
18
GAIN (dB)
-7
Figure 29. AMPS Upconverter Output Power
vs. LO Power and Vcc.
20
11
-9
Plo (dBm)
Figure 28. AMPS Upconverter Output Power
vs. Temperature and Vcc.
31
27
TEMPERATURE (°C)
10
824
33
-8
-10
-40
VccBat = 3.3 V
VccBat = 3.6 V
VccBat = 4.2 V
Pin = -12 dBm
Pin = -12 dBm
Pout (dBm)
-2
Pout (dBm)
Pout (dBm)
-2
0
Vcc = 2.7 V
Vcc = 3 V
Vcc = 3.6 V
40
60
80
TEMPERATURE (°C)
Figure 32. AMPS Driver Output Power @
3 dB Gain Compression vs. Temperature
and VccBat.
Figure 30. AMPS Driver IccBat vs.
Temperature and VccBat.
80
HPMX-7202 Typical Performance Graphs , continued
Vcc = 3 V, VccBat = 3.6 V, Plo = -11 dBm, Vif-in = 480 mVp-p, unless otherwise stated
50
50
25
25
0
25
100
50
100
100
25
0
50
100
957 MHz
1810 MHz
1810 MHz
Figure 33. PCS LO Port Impedance vs. Frequency.
Figure 34. Cellular LO Port Impedance vs. Frequency.
50
50
25
25
100
25
0
50
957 MHz
100
100
25
0
50
100
736 MHz
1780 MHz
936 MHz
1980 MHz
Figure 35. PCS CDMA Mixer Output Impedance vs.
Frequency.
Figure 36. Cellular CDMA Mixer Output Impedance vs.
Frequency.
50
50
25
25
0
25
100
50
100
0
100
25
50
100
736 MHz
936 MHz
1980 MHz
Figure 37. AMPS Mixer Output Impedance vs.
Frequency.
12
1780 MHz
Figure 38. PCS CDMA Driver Input Impedance vs.
Frequency.
HPMX-7202 Typical Performance Graphs , continued
Vcc = 3 V, VccBat = 3.6 V, Plo = -11 dBm, Vif-in = 480 mVp-p, unless otherwise stated
50
50
25
100
25
0
25
50
100
100
25
0
50
100
1780 MHz
736 MHz
936 MHz
1980 MHz
Figure 39. Cellular CDMA Driver Input Impedance vs.
Frequency.
Figure 40. PCS CDMA Driver Output Impedance vs.
Frequency.
50
50
25
25
0
25
100
50
100
100
25
0
50
100
736 MHz
936 MHz
736 MHz
936 MHz
Figure 41. Cellular CDMA Driver Output Impedance vs.
Frequency.
50
25
100
25
0
50
100
936 MHz
736 MHz
Figure 43. AMPS Driver Output Impedance vs.
Frequency.
13
Figure 42. AMPS Driver Input Impedance vs.
Frequency.
HPMX-7202 Typical Performance Graphs , continued
Vcc = 3 V, VccBat = 3.6 V, Plo = -11 dBm, Vif-in = 480 mVp-p, unless otherwise stated
600
4
400
200
10
50
90
130
170
210
6
IflnM
400
2
0
250
200
400
0
250
200
Figure 44. IF Input Port Equivalent Circuit (PCS
CDMA Mode) vs. Frequency.
130
170
210
FREQUENCY (MHz)
Figure 45. IF Input Port Equivalent Circuit
(Cellular CDMA Mode) vs. Frequency.
6
IflnM
2
2
90
C
R
800
4
4
50
8
IflnP
600
600
FREQUENCY (MHz)
14
C
R
800
10
1000
8
IflnP
Rshunt (ohm)
6
Rshunt (ohm)
C
R
IflnM
1000
Cshunt (pF)
8
IflnP
800
R shunt
C shunt
R shunt
C shunt
Cshunt (pF)
Rshunt (ohm)
1000
10
1200
10
1200
R shunt
C shunt
10
50
90
130
170
210
FREQUENCY (MHz)
Figure 46. IF Input Port Equivalent Circuit
(AMPS Mode) vs. Frequency.
0
250
Cshunt (pF)
10
1200
Theory of Operation
The HPMX-7202 is designed for
operation in Dual-Band, Tri-Mode
PCS/CDMA800/AMPS handsets. The
device has four modes of operation
set by the pins pwrDn, Mode and
Band as represented in Table 2. In
addition, the gain in both PCS and
cellular CDMA modes is adjustable
by controlling the voltage on the
RFTxAgc pin. Refer to Figure 47 as
a reference for the following circuit
descriptions.
PCS CDMA Mode
The PCS CDMA chain consists of
a double balanced active mixer
and a variable gain amplifier
(VGA). The differential IF input to
the balanced mixer IFInP and
IFInM (pins 9 and 10) has a
nominal impedance of 470Ω,
differential. For test purposes, the
IF is fed single-ended to the
HPMX-7202 through the use of a
balun. The balun is shown in
Figure 47. Components C9, C6,
L19 and transformer X1 comprise
the balun. The IF input at pins 9
and 10 is shared by both PCS and
cellular mixers.
The PCSLO input (pin 13) is
specifically for the PCS mixer. The
LO ground (pin 14) is connected
to ground through a blocking
capacitor and it is shared by the
PCS and cellular mixers. The RF
output of the PCS mixer is a
differential signal across
PCSMixOutP and PCSMixOutM
(pins 8 and 7). Both pins are open
collector and require external
connections to Vcc. For maximum
linearity and maximum voltage
swing from the mixer, a 200Ω
resistor was chosen as an optimum load impedance. Reference
Figure 47 for additional circuit
information. Resistors R25 and
R26 represent the external 200Ω
load impedance. Components L3/
C11 and L4/C10 provide a simple 2
element impedance matching
network to 50Ω. Bias is fed in via
the shunt inductors L3 and L4 and
bypassed with C20 and C31.
The PCS CDMA upconverter
mixer includes an LO buffer which
allows operation at low LO input
power and low power supply
levels. With an LO input of
-11 dBm and an IF input differential signal of 480 mVp-p, the
upconverter typically delivers
-7 dBm when properly matched to
a 50Ω load at 1880 MHz. The
mixer ACPR performance is
typically -66 dBc/30 kHz (at
1.25 MHz offset frequency and an
output power of -9 dBm) with an
output noise power of
-154 dBm/Hz at +80 MHz offset.
The mixer output is typically
connected through an off-chip
filter and then connected to the
PCS VGA. The input to the VGA is
single ended (PCSDrvIn, pin 5)
and is easily matched to 50Ω. A
high pass impedance matching
network consisting of L5 and C15
provides the necessary match. The
output of the VGA is PCSDrvOut
at pin 19. A matching network
consisting of C12 and L6 provide a
Table 2. HPMX-7202 Mode Control
pwrDn
Mode
Band
Power Down
0
X
X
Cellular AMPS
1
0
X
Cellular CDMA
1
1
0
PCS CDMA
1
1
1
X = pin can be in any state
15
power match for 50Ω. Bias is also
fed into pin 19 with L7 properly
bypassed with C19 and C30.
The VGA is implemented in a 2
stage common-emitter configuration which offers 35 dB (typ.) gain
control range (-10 dB to 25 dB
gain) with a linear gain (in dB) vs.
voltage transfer characteristic.
See the Typical Performance
Graphs for more information.
The gain is controlled via the
RFTxAgc pin (pin 30). If connection to a Pulse Density Modulation
signal is used, an external filter is
required to generate the control
voltage for this input.
The HPMX-7202 VGA features
adaptive biasing, which decreases
the bias current to the VGA at
lower gain levels, thus decreasing
the power consumption of the
VGA. See the Typical Performance Graphs for more information. The ACPR performance is
also a function of the bias current.
The linearity increases at higher
RFTxAgc voltages. When used in
association with an IF AGC
amplifier this feature allows the
required ACPR to be achieved at
the minimum possible supply
current for each targeted output
power. See the Additional Application Information section for more
detail on adaptive biasing and
optimizing the supply current
drawn by the HPMX-7202 in a
handset.
Cellular AMPS and CDMA Modes
The cellular chain consists of two
double balanced mixers and two
driver amplifiers, one set for
AMPS and one for CDMA. The
more stringent linearity and ACPR
specifications associated with
CDMA requires a separate
upconverter chain. Each of the
cellular upconverters is a Gilbert
cell structure offering excellent
port to port isolation.
The differential IF input (pins 9
and 10) is shared by both cellular
mixers and the PCS mixer. The IF
port characteristics are explained
in the PCS CDMA mode description. The outputs from both
cellular double balanced mixers
are also differential and appear
across CellMixOutM (pin 1) and
CellMixOutP (pin 32). As the
mixer output is open collector,
these pins require an external
connection through a bias
decoupling network to Vcc.
For maximum linearity and
maximum voltage swing from the
mixer, a 200Ω resistor was chosen
as an optimum load impedance.
Reference Figure 47 for additional
circuit information. Resistors R27
and R28 represent the external
200Ω load impedance. Components L10/C14 and L11/C13
provide a simple 2 element
impedance matching network to
50Ω. Bias is fed in via the shunt
inductors L10 and L11 and bypassed with C21 and C32.
With an LO power of –11 dBm and
an IF input voltage of 480mVp-p
differential and the output matching network described in Figure
47, the cellular AMPS upconverter
delivers –5 dBm into a 50Ω load.
At an output power of –6 dBm, the
mixer exhibits a noise power of
-148 dBm/Hz at 45 MHz carrier
offset.
16
Under similar drive and matching
conditions, the cellular CDMA
upconverter delivers –8 dBm into
a 50Ω load. At an output power of
–9 dBm, the mixer exhibits a noise
power of –154 dBm/Hz at 45 MHz
carrier offset.
The output from the cellular mixer
is routed off-chip to a discrete
filter which provides image
rejection. The gain and power
distribution of the HPMX-7202
was based on a nominal 3 dB loss
for the image reject filter.
The input to the cellular driver
amplifier is single ended
(CellDrvIn, pin 3) and is easily
matched to the impedance of the
external filter which is typically
50Ω. The cellular driver amplifier
input is internally AC coupled with
an on-chip capacitor. The output
of the cellular amplifier
(CellDrvOut) is at pin 22. A
matching network consisting of
C16 and L12 provides a power
match for 50Ω. Bias is also fed
into pin 22 with a bias decoupling
network consisting of L13 properly bypassed with C25 and C42.
At 836 MHz the cellular AMPS
driver produces 19 dB of gain and
an output P1dB of +6.6 dBm. At
+9 dBm output power into a 50Ω
load, the receive band noise level
is typically -133 dBm/Hz.
The cellular CDMA mode VGA is
implemented in a 2 stage commonemitter configuration which offers
40 dB (typ.) gain control range
(-14 dB to 26 dB gain) with a linear
gain (in dB) vs. voltage transfer
characteristic. See the Typical
Performance Graphs for more
information. The gain is controlled
via the RFTxAgc pin (pin 30). If
connection to a Pulse Density
Modulation signal is used, an
external filter is required to
generate the control voltage for
this input.
The HPMX-7202 cellular VGA
features adaptive biasing, which
decreases the bias current to the
VGA lowering the gain and power
output. This feature has already
been covered in detail in the PCS
section.
J11
J13
J2
J3
J12
J9
R7
R14
R6
C40
C39
C13
R13
C38
R1
C37
C32
C21
R27
L10
R28
L1
R31
R18
C22
C36
R17
C23
L11
R16
C29
R15
R19
J1
R20
R4
C14
J1: CellMixOutVcc
J2: Vcc
J3: DrvVccBat
J4: Mode Select
J5: CellDrvOutVccBat
J6: Vcc
J7: Ground
C18
J8: Ground
J9: RFTxAgc
J10: PCSDrvOutVccBat
J11: Band Select
J12: pwrDn
J13: VccBat
J14: PCSMixOutVcc
R21
J4
32
RF1
C44
25
24
1
C42
C25
J5
L14
R23
C17
L13
C16
RF7
RF2
L12
C15
RF4
L5
L6
C12
R22
RF6
C10
L7
RF5
L4
J10
R25
R3
J14
C31
C19
8
C20
L3
9
R26
16
L2
C11
J3
C33
C6
C41
L8
X1
RF1: CellMixOut
RF2: CellDrvIn
RF3: PCSLOIn
RF4: PCSDrvIn
RF5: PCSMixOut
RF6: PCSDrvOut
RF7: CellDrvOut
RF8: CellLOIn
RF9: IFIn
R10
C34
R12
C30
17
R32
C35
L9
C26
C43
RF9
C9
C24
R34
R33
L19
R5
RF3
Figure 47. HPMX-7202 Demonstration Printed Circuit Board.
RF8
J6
C1-C5, C7, C8, C27, C28, C33-C35
Not used
L1
1.0 nH
C6
68 pF
L2
2.2 nH
C9
3.9 pF
L3, L4, L7
3.3 nH
C10, C11
1 pF
L5,L6
3.9 nH
C12
1.8 pF
L8
4.7 nH
C13, C14
2.2 pF
L9
10 nH
L10, L11, L12, L13, L14
12 nH
C15
3.3 pF
L19
39 nH
C16
4.7 pF
R1, R2, R8, R9, R11, R22, R23, R24, R29, R30
Not used
C17
12 pF
R3, R4, R5, R6, R7, R10
0Ω
C18, C19, C20, C21, C22, C23, C24, C25, C26
100 pF
R12, R13
50Ω. Not used with
differential output
C29, C30, C31, C32, C39, C40, C41, C42
0.1 µF
R14, R15, R16, R17, R18, R19, R20, R21
1kΩ
C43
1 µF
R25, R26, R27, R28
200Ω
C33, C34, C36, C37, C38, C44
0.01 µF
R31, R32
39Ω
R33, R34
56Ω
X1
Toko 671DB-1018
180o transformer
Component List for Demo PCB shown in Figure 47.
17
HPMX-7202 Demo PCB Circuit Design
The test diagram shown in Figure
47 presents the various impedance
matching and bias de-coupling
networks used on the HPMX-7202
demo PCB. The HPMX-7202 was
designed such that the IC can
operate from separate regulated
(Vcc pin) and unregulated (VccBat
pin) voltage supplies. Operating
the driver amplifiers from the
higher unregulated voltage
enhances ACPR performance.
Good IC grounding is very important for proper operation. Of equal
importance is proper de-coupling
of the Vcc, VccBat and control
pins.
Good grounding can be achieved
by using separate plated through
holes to the bottom groundplane
for each supply line bypass
capacitor and each IC ground.
This technique minimizes common
mode ground inductance.
Proper decoupling of Vcc and
VccBat from the RF ports is also
required. This is accomplished by
taking advantage of a high pass
impedance matching network and
using the shunt inductor as a
means of inserting bias to a
particular pin. This is accomplished by taking the power
supply end of the shunt inductor
and lifting it above DC ground by
using 1 or 2 bypass capacitors. It
is important that the grounds for
the bypass capacitors for each
bias line be brought through to the
bottom ground plane with individual plated through holes. This
minimizes common lead ground
problems that might occur if
multiple bypass capacitors from
various bias lines are brought to a
common top side etch and then
attached to the bottom ground
plane with only 1 or 2 plated
through holes.
Decoupling on the control lines is
accomplished by using a combination of bypass capacitors and
series high value resistors to
provide isolation between the IC
and the control circuitry. This is
especially important when the
RFTxAgc control line is driven
with a Pulse Density Modulated
(PDM) signal.
Normal HPMX-7202 operation
requires differential input at the IF
port. However, for test purposes, a
balun (X1) is included on the
demo board which allows the use
of a 50Ω IF source. The input to
the balun is matched to 50Ω with a
matching network consisting of
L19, C6 and C9. The actual demo
board for the HPMX-7202 is shown
in Figure 48. The demo board is a
Table 3. HPMX-7202 Jumper Position vs. Mode.
Switch Label
HPMX-7202 Function
Left Position (Pins 1 & 2)
Right Position (Pins 2 & 3)
off/on
pwrDn [1]
Off [2]
On
Gmin/max
RFTxAgc
Min Gain
Max Gain
Fm/cdma
Mode
AMPS
CDMA
Cell/PCS
Band
Cellular
PCS
Notes:
1. In all the literature, the “Power Down” function is indicated as pwrDn. On the demonstration
board only, it is labelled on the 14 pin header as slpB.
2. To measure minimum current consumption, also set Gmin/max = Min Gain (VRFTxAgc = 0V).
18
multi-layer PCB designed for
multiple uses. The 14 pin connector in the upper right hand corner
of the PCB is designed to be
compatible with automated
characterization equipment. No
connections are required to be
made to the 14 pin connector. For
customer characterization,
additional switch jumpers have
been included for ease of use
along with separate Vcc and
VccBat supply terminals. The
various modes are explained in
Table 3. Modes are set with
shorting jumpers that connect
pins 1 and 2 (Left Position) or pins
2 and 3 (Right Position).
It is important that the demo
board be powered up with the
proper sequence. The “pwrDn”
(off/on) shorting jumper must be
in the left position during powerup. With the “pwrDn” shorting
jumper in the left position, apply
both Vcc and VccBat to the
appropriate terminals. Then move
the “pwrDn” switch jumper to the
“on” position. The initial position
of the remaining 3 switch jumpers
is not important during initial
power-up. Mode control can now
be accomplished by proper
positioning of the switch jumpers.
8
MixOutCell
1
1
DrvInPcs
1
2
3
DrvOutPcs
DrvInCell
1 = Vcc
2 = Vcc
3 = VccBat
4 = mode
5 = VccBat
6 = Vcc
7 = gnd
8 = gnd
9 = Vagc
10 = VccBat
11 = band
12 = slpB
13 = VccBat
14 = Vcc
DrvOutCell
AGILENT TECHNOLOGIES
Gmin/max
fm/cdma
cell/pcs
MixOutPcs
Ifln
hpmx 7202
Demo PCB
02/00
Vbat
BW_006
Vcc
LoCell
Off/On
LoPcs
Figure 48. HPMX-7202 Demo PCB Layout.
Additional Application Information
This chip is part of Agilent’s
CDMAdvantage solution. CDMA
or Code Division Multiple Access
uses correlative codes to distinguish one user from another.
Frequency divisions are also used,
but in a much larger bandwidth
(1.25 MHz) than in AMPS
(Advanced Mobile Phone System)
applications. In CDMA, a single
user’s channel consists of a
specific frequency combined with
a unique code. Channels with
other codes appear to a receiver
as uncorrelated interference.
CDMA also uses sectored cells to
increase capacity. One of the
major differences in CDMA is its
ability to use the same frequency
in all sectors of all cells.
19
Capacity in a CDMA system can
be increased by minimizing the
interference caused by other users
(each with their own code) on the
CDMA channel. Since each user’s
transmitted signal appears as
interference to all other users,
having the mobile-stations transmit at the lowest possible power is
especially important for CDMA
systems, although it is important
for all multiple access systems to
reduce interference.
To accomplish this, the CDMA
base-station establishes a very
tight closed-loop control of the
output power of each mobile,
commanding it to adjust its power
up or down by 1 dB every 1.25 ms,
with the goal of setting the power
received at the base-station
antenna to the minimum required.
As a mobile station traverses a
cell, its output power will be
decreased when it approaches the
base-station, and it will be increased as it gets farther away
from the center of the cell.
The main objective, as explained
above, for continuously adjusting
the output power of a mobile in a
CDMA system is to optimize
capacity. Using adaptive-bias
techniques in the RF section of
CDMA mobile phones, the closedloop requirements can be capitalized on to provide enhanced
standby and talk-time performance, while at the same time
delivering superior linearity at
high output powers.
PROBABILITY (%)
4
3
2
1
0
-60
-40
-20
0
20
40
TRANSMIT POWER AT ANTENNA (dBm)
Figure 49. Probability Distribution of Mobile
Transmit Power.
The TIA/EIA-98-C CDMA standard
requires the output power of the
mobile-station to vary from –50 to
+23 dBm (TIA/EIA-98-C, Recommended minimum performance
standards for dual-mode spread
spectrum mobile-stations). The
CDMA Development Group (CDG)
has published statistical profiles
for the mobile-station transmit
power, that were generated from
actual field test data from deployed CDMA units. Figure 49
shows the probability distributions for urban and suburban
topographies. It is rather clear
from inspecting the curves in
Figure 49, that the average transmit power in the mobile (10.6 dBm
– suburban, 5.4 dBm – urban) is
significantly lower than the
maximum. (Note: the average
transmit power is not at the peak
of the distribution functions
shown in Figure 49 because of the
logarithmic scale on the x-axis).
Current consumption in the
transmit chain at maximum output
is many times considered the only
critical figure of merit for selecting the RF components to be used
in a handset design. Current
consumption at maximum output
power is of course still important,
for both RF and thermal design
reasons. For example, an additional incentive for keeping the
20
current consumption at maximum
output power as low as possible,
is that the statistical profiles will
vary from user to user depending
on usage patterns and conditions.
In other words, although the
statistical profiles published by
the CDG obey the laws of large
numbers, the statistical profile for
an individual user may differ
significantly.
Having said that, the real figure of
merit for CDMA mobile phone
should be the statistical-average
current consumption, Icc-µ which
is the current consumption
integrated over the user’s statistical profile. In fact, the CDG’s talktime method of measurement
consists of continuously sweeping
the output power of the mobile
from –50 to +23 dBm according to
the statistical profiles shown in
Figure 49, to arrive at an industrystandard definition of talk-time
(CDG Stage 4 system performance
tests).
If the RF components have a fixed
bias, then the current consumption at maximum output power is
the same as the statistical-average
current consumption. This is often
the case with the baseband and
first IF stages of many radio
designs. In the higher power
stages, particularly the PA driver
and the PA itself, the supply
current is a strong function of
output power. However, if the RF
components use adaptive-bias
techniques such that the current
consumption decreases with the
output power, then the maximum
and statistical-average current
consumption can be set independently, optimizing each one as
needed. The current consumption
at maximum output power is
designed to deliver the required
linearity, while the statisticalaverage current consumption is
designed to maximize talk-time.
Figure 49 illustrates the fact that
the mobile spends – statistically –
little time at the maximum output
power, and therefore the current
consumption at that point has only
a minor influence on the statistical-average current and, by
extension, on talk-time.
Figure 50 illustrates the effect of
using adaptive bias techniques in
the RF VGA of the HPMX-7202.
The plot shows the measured gain
and current consumption vs. the
gain control voltage, RFTxAgc, for
the PCS CDMA output. As the gain
is reduced, and hence the output
power, the current consumption
decreases while still maintaining
an adequate ACPR. Note that the
current plotted is only the VGA
current, the mixer current is not
included.
100
30
Gain
Current
20
80
10
60
0
40
-10
20
-20
0
0.5
1
1.5
2
2.5
3
IccBat (mA)
urban
suburban
GAIN (dB)
5
0
3.5
RFTxAgc (V)
Figure 50. HPMX-7202 RF VGA Gain and Supply
Current Consumption vs. RFTxAgc Voltage.
Figure 51 shows the total current
consumption for the HPMX-7202
versus output power for a constant ACPR of -55 dBc/30 kHz in
the PCS band. (This ACPR was
selected arbitrarily; similar plots
can be produced for other values.)
120
Current Consumption
(ACPR = -55 dBc/30 kHz)
Itot (mA)
100
80
60
Continuous
3 state
2 state
40
-40
-30
-20
-10
0
10
20
Pout (dBm)
Figure 52 shows the statisticalaverage current consumption of
the upconverter/driver RFICs
versus the required maximum
output power out of the device.
The data is generated by integrating the curves in Figure 51 over
the complete output power range
of the mobile under the suburban
user model. The suburban model
gives a higher statistical-average
current than the urban model due
to the probability distribution tail
at high powers. The choice of
maximum output power is determined by the gain of the power
amplifier, and the loss of the
filters, duplexers etc. that follow
the upconverter driver amplifier
and the PA.
Figure 51. HPMX-7202 Total Current
Consumption vs. Output Power and Control
Method.
75
Suburban model (ACPR = -55 dBc/30 kHz)
Continuous
3 state
2 state
21
Iµ (mA)
70
The plot was generated by adjusting the input power and the gain
control voltage to achieve the
ACPR = –55 dBc at the lowest
possible current consumption, for
each output power. The
HPMX-7202 can deliver up to
+9 dBm of power. The lower trace
on the plot shows how the total
current varies versus output
power if the gain control voltage is
adjusted continuously. The next
(middle) trace illustrates the
performance of the device if the
gain control voltage adjustment is
limited to 3 discrete states, rather
than a continuum. This method
simplifies the operation of the
part, at the expense of a higher
statistical-average current consumption. The upper trace illustrates the performance if the gain
control voltage adjustment is
further limited to only 2 discrete
states.
65
60
in Table 4, the statistical-average
current consumption can be as
low as 56 mA, if the phone can
perform a continuous control of
the RF VGA. The statistical
average current consumption is
still a low 70 mA, even if an
extremely simple 2-state gain
control adjustment is used. Even
with a simple 2 state control
algorithm, the average supply
current is still significantly below
the peak current of 94 mA at
maximum power.
Clearly, relatively low statisticalaverage current consumption can
be achieved in the transmit RF
section of the mobile if adaptivebias techniques are used. Use of
adaptive bias techniques at lower
output powers combined with the
HPMX-7202’s excellent linearity at
high output powers provides
manufacturing margin for linearity
while also maintaining extended
talk time.
Table 4. Statistical Average Supply
Current. Pout max = +9 dBm
55
50
3
4
5
6
7
8
9
Poutmax (dBm)
Figure 52. HPMX-7202 Statistical-Average
Current Consumption vs. Desired Maximum
Output Power.
Figure 51 and Figure 52 illustrate
the significant advantage of using
adaptive-bias techniques in CDMA
mobile phones. The HPMX-7202
has a total current consumption
(upconverter + driver) of 94 mA
when delivering +9 dBm of output
power with an ACPR = -55 dBc/
30 kHz. However, as summarized
Control Method
Average Supply Current
Analog (N states)
56 mA
3 State
64 mA
2 State
70 mA
Part Number Ordering Information
Part Number
No. of Devices
Container
HPMX-7202-BLK
10
Bulk
HPMX-7202-TR1
1000
Tape and Reel
Package Dimensions
JEDEC Standard TQFP-32 Package
7.0 ± 0.25
5.0 ± 0.1
7.0 ± 0.25
HPMX-7202
5.0 ± 0.1
YY WW
0.22 typ
0.50
1.4 ± 0.05
0.6 ± 0.15,010
0.05 min./0.1 max.
ALL DIMENSIONS SHOWN IN mm
22
Tape Dimensions and Product Orientation for Outline 5 mm x 5 mm TQFP-32
REEL
CARRIER
TAPE
USER
FEED
DIRECTION
COVER TAPE
2.0 (See Note 7)
0.30 ± 0.05
1.5+0.1/-0.0 DIA
4.0 (See Note 2)
1.75
R 0.5 (2)
HPMX-7202
1.6 (2)
BO
5.0
K1
KO
7.5 (See Note 7)
6.4 (2)
AO
12.0
1.5 Min.
Cover tape width = 13.3 ± 0.1 mm
Cover tape thickness = 0.051 mm (0.002 inch)
AO = 9.3 mm
BO = 9.3 mm
KO = 2.2 mm
K1 = 1.6 mm
NOTES:
1. Dimensions are in millimeters
2. 10 sprocket hole pitch cumulative tolerance ±0.2
3. Chamber not to exceed 1 mm in 100 mm
4. Material: black conductive Advantek™ polystyrene
5. AO and BO measured on a plane 0.3 mm above the bottom of the pocket.
6. KO measured from a plane on the inside bottom of the pocket to the top surface of the carrier.
7. Pocket position relative to sprocket hole measured as true position of pocket, not pocket hole.
23
16.0 ± 0.3
www.semiconductor.agilent.com
Data subject to change.
Copyright © 2001 Agilent Technologies, Inc.
Obsoletes 5980-1291E, 5980-2260E
March 28, 2001
5980-2966EN