INTEGRATED CIRCUITS
SA9500
Dual-band, CDMA/AMPS
downconverter IC
Product specification
Supersedes data of 1998 Jul 07
IC17 Data Handbook
1998 Aug 11
Philips
Semiconductors
Philips Semiconductors
Product specification
Dual-band, CDMA/AMPS downconverter IC
SA9500
DESCRIPTION
The SA9500 integrates all the front end receive mixers necessary
for use in dual-band, triple-mode CDMA/AMPS cellular phone
handsets. There are three individual mixer blocks, each optimised
for high linearity with low power consumption for operation in one of
the following modes: High-band 1900MHz PCS CDMA, low-band
800MHz cellular CDMA or analog FM AMPS/TACS modes.
Additionally, the entire circuit can be powered down and put into
sleep mode, reducing the supply current to less than 20µA. The
circuit has been designed in our advanced QUBiC2 BiCMOS
process with 20GHz f
T
.
•
Programmable wideband LO output buffer
•
Low voltage operation down to 2.7V
•
Low current consumption in “idle”/receive modes:
–
PCS :
–
CDMA:
–
FM:
20.0mA @ 2.7V
20.2mA @ 2.7V
7.7mA @ 2.7V
•
Low standby current in sleep mode <20µA
•
TSSOP20 package
APPLICATIONS
FEATURES
–
PCS:
–
CDMA:
–
FM:
•
PCS and cellular downconverter mixers typical performance:
Gain=11.3dB, NF=8.3dB, IIP3= +1.4dBm
Gain=10.7dB, NF=9.6dB, IIP3= +6.3dBm
Gain= 7.2dB, NF=10.2dB, IIP3= +5.9dBm
•
Separate, selectable IF outputs to suit FM and CDMA bandwiths
•
Integrated frequency doubler for PCS mixer LO
ORDERING INFORMATION
EXTENDED
TYPE NUMBER
SA9500DH
•
800MHz analog FM and CDMA digital receivers
•
1900MHz PCS band CDMA digital recievers
•
Supports dual-mode and triple-mode operation
•
Digital mobile communications equipment
•
Portable, low power radio equipment
PACKAGE
PINS
20
PIN POSITION
TSSOP
MATERIAL
Plastic thin shrink small outline package; body 6.5 x 4.4 x 1.1 mm
CODE
SOT360-1
1998 Aug 11
2
853–2109 19859
Philips Semiconductors
Product specification
Dual-band, CDMA/AMPS downconverter IC
SA9500
BLOCK DIAGRAM
RX BPF
Fo = 1960 MHz
BW = 60 MHz
PCS_in
2
2
CELL
×2
2
Cell_in
1
1
1
2×LO
LO
2
FM IF BPF
Fo = 85.38MHz
BW = 30kHz
2
2
FM_Out
2
2
PCS
2
CDMA_Out
CDMA IF BPF
Fo = 85.38MHz
BW = 1.23MHz
RX BPF
Fo = 881.5MHz
BW = 45 MHz
SA9500
1
MODE
SELECT
LOGIC
BIAS
CTRL
1
CDMA/FM
PCS/CELL
LO OUT
LO GAIN
LO IN
V
CC
PWR ON/OFF
SR01598
Figure 1. Block Diagram
Table 1.
Mode Selection Summary
PCS/CEL (Pin 6)
low
low
high
high
CDMA/FM/LO doubler (Pin 17)
low
high
low
high
Cellular FM
Cellular CDMA
CDMA PCS, 1GHz (LO out)
CDMA PCS, 2GHz (2×LO out)
MODE
1998 Aug 11
3
Philips Semiconductors
Product specification
Dual-band, CDMA/AMPS downconverter IC
SA9500
PIN CONFIGURATION
FM IF
FM IFB
GND
PCS RF
PCS RFB
PCS/CEL SEL
PWR ON/OFF
CEL RF
GND
1
2
3
4
5
6
7
8
9
20 CDMA IF
19 CDMA IFB
18 GND
17 CDMA/FM SEL
16 CEL LO IN
15 GND
14 GND
13 LO GAIN
12 GND
11 LO OUT
FUNCTIONAL DESCRIPTION
Mode Selection Logic
The SA9500 downconverter IC has several modes of operation for
which the selection logic is summarized in Table 1 and defined in
detail in Table 2. Different mode selections require different portions
of the circuit to be active. It should be noted that only the states
specified in Table 2 are valid selections for operation.
Local Oscillator Section
Drive for the local oscillator is provided through a single ended input
via pin16. The LO signal has to be AC-coupled into the circuit and
needs to be externally matched. Inside the circuit, the LO signal is
amplified and buffered to drive: Either the cellular CDMA mixer or
FM mixer or the frequency doubler for the PCS mixer LO and
additionally one of the LO output buffers. The mode selection
summary in Table 1 shows the logic to apply to pins 6 and 17 to
choose one of four possible modes. The LO output buffer can supply
either the same frequency as that input on pin 16 or doubled
frequency LO in CDMA PCS modes. The LO output power range
can be programmed between high gain and low gain (idle mode)
settings with LO gain on pin 13.
V
CC
10
SR01688
Figure 2. Pin Configuration
PIN DESCRIPTION
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
SYMBOL
FM IF
FM IFB
GND
PCS RF
PCS RFB
PCS/CEL SEL
PWR ON/OFF
CEL RF
GND
V
CC
LO OUT
GND
LO GAIN
GND
GND
CEL LO
CDMA/FM SEL
DESCRIPTION
Non-inverting FM IF output
Inverting FM IF output
Analog ground
non-inverting PCS RF input
Inverting PCS RF input
PCS and cellular band select
Power enable
Cellular RF input
Ground
Power supply
LO output to synthesizer
Ground
Logic signal which adjusts the gain of
the LO buffer
Ground
Ground
Cellular LO input
CDMA and FM mode select in the
cellular band; selects LO buffer output
frequency in PCS mode
Ground
Inverting CDMA IF output
Non-inverting CDMA IF output
Cellular and PCS Mixers
The SA9500 has one single ended cellular band RF input which
feeds either the cellular CDMA mixer or the cellular FM mixer
circuits. Each mixer is optimized to meet cellular band CDMA or
analog FM requirements. The cellular FM mixer has its own
dedicated differential output on pins 1 and 2 which should be
externally matched to the FM IF SAW filter. The cellular CDMA
mixer shares the same output pins with the CDMA PCS mixer.
Selection between these two mixers is via pin 6 (PCS/CEL) and as
the two mixers are never on at the same time, it allows a common
CDMA SAW filter to be used for both bands. The CDMA PCS mixer
has a differential RF input which should be used with an external
balun matching circuit. To avoid upsetting the internal biasing, the
RF inputs at both cellular and PCS band mixers should be
AC-coupled. The CDMA and FM IF mixer outputs are of the open
collector type. So, they should be biased to the supply voltage V
CC
with external tuning inductors which can also serve in the matching
of the IF SAW filter.
18
19
20
GND
CDMA IFB
CDMA IF
1998 Aug 11
4
Philips Semiconductors
Product specification
Dual-band, CDMA/AMPS downconverter IC
SA9500
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PARAMETER
RATINGS
UNITS
V
V
Supply voltage (V
CC
)
Logic input voltage
–0.3 to +6.0
–0.3 to V
CC
+0.3
+20
800
150
Maximum power input
dBm
mW
°C
°C
Power dissipation, T
amb
=25°C
Storage temperature
Maximum operating junction temperature
–65 to +150
ABSOLUTE MAXIMUM RATINGS
RECOMMENDED OPERATING CONDITIONS
PARAMETER
LIMITS
TYP.
2.85
TEST CONDITIONS
MIN.
2.7
MAX.
3.3
UNITS
V
V
V
Supply voltage (V
CC
)
LOW
–0.3
Logic input voltage range
0.2V
CC
HIGH
0.5V
CC
–30
0
V
CC
+0.3
+85
105
Operating ambient temperature range (T
amb
)
Operating junction temperature range
°C
°C
MODE SELECT LOGIC AND DC CHARACTERISTICS
Table 2.
Mode Logic Definition
TYPICAL
CURRENT
CONSUMPTION
27.0 mA
21.3 mA
23.5 mA
20.0 mA
24 mA
20.2 mA
11 mA
7.7 mA
12
µA
MAXIMUM
CURRENT
CONSUMPTION
30.6 mA
24.3 mA
26.5 mA
22.5 mA
28 mA
24 mA
14.4 mA
9.9 mA
60
µA
V
CC
= +2.7 V to +3.3 V; T
amb
= –30°C to +85°C, unless specified otherwise.
MODE
1
2
3
4
5
6
7
8
9
MODE DESCRIPTION
PCS RxTx
(with doubled LO out)
PCS Idle
(with doubled LO out)
PCS RxTx
PCS Rx Idle
Cellular CDMA RxTx
Cellular CDMA Rx Idle
Cellular FM RxTx
Cellular FM Rx Idle
Sleep
LO GAIN/
high
low
high
low
high
low
high
low
x
POWER/
high
high
high
high
high
high
high
high
low
PCS/CEL
high
high
high
high
low
low
low
low
x
CDMA/FM
high
high
low
low
high
high
low
low
x
FIGURE
3
4
5
6
7
8
9
10
11
NOTE:
x = Don’t care
1998 Aug 11
5
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