1
Features
KPCS Band CDMA and GPS Operation
Low Current Consumption
Excellent Noise and IP3 Performance
Adjustable Third Order Intercept on LNA Stage
Flexible IF Frequency Range from 80 MHz to 230 MHz
Excellent Cross Modulation Performance
Applications
Quad-mode/Dual-band CDMA IS-95/98 Based Mobile Phones with GPS Support
Other Familiar Applications
Benefits
High Linearity Eliminates Potential Call Drop Issues Associated with Gain Switching
Most Compact Integrated Receiver for K-PCS and A-GPS Applications
IM98 IMD Requirements Met with two Gain States Simplifying Calibration Procedure
Best in Class A-GPS CascadeGgain for Maximum Take-over
TX LO Buffer Included
Few External Components
Fully ESD Protected
Electrostatic sensitive device.
Observe precautions for handling.
Description
The T0352 is a CDMA front-end receiver RFIC designed for dual-band, dual-mode
operation. The device supports Korean PCS (K-PCS) CDMA and A-GPS operation.
The IF range is from 80 MHz to 230 MHz with external tuning. The K-PCS low noise
amplifier has an adjustable third order intercept (IP3) to minimize inter-modulation and
cross-modulation effects. The mixers are designed for differential IF outputs (single-
ended or differential IF outputs for GPS modes), and they feature excellent linearity
and low noise figure.
The T0352 device is available in a 4 mm
4 mm MLF package with 24 pins. This
front-end receiver is capable of meeting all electrical requirements in accordance with
the TIA/EIA 98-C Wireless Communication standard.
2.8 V Dual-band/
Dual-mode RF
Receiver for
K-PCS/GPS
T0352
Preliminary
(Summary)
Rev. 4579ASCDMA11/02
2
T0352
4579ASCDMA11/02
Figure 1. Block Diagram
Pin Configuration
Figure 2. Pinning HP-VFQFP-N24
PLO_IN
BUFFEN
PCS_On
LIN/GPS
Con
t
r
o
l
PLNA_IN
PLO_Out
PCS_Out+
PCS_Out-
P
L
NA
_
O
UT
PMi
x
_
I
N
P
L
NA
_
G
ND
Is
e
t
_
P
C
S
2
3
24
20
1
21
23
22
18
17
12
8
GLNA_IN
GMix_Out+
GMix_Out-
GM
ix
_I
N
GL
NA
_O
ut
Vc
c_
Mi
x
5
7
11
15
14
13
Vcc_Dig
GLO_IN
9
Vc
c_
L
N
A
4
Vcc_LO
6
19
ISET_PCS
PLNA_IN
VCC_LNA
GLNA_IN
GND
VCC_LO
PMix_O+
PMix_O-
GND
VCC_ MIX
GMix_Out-
P
L
NA
_O
UT
PC
S_
O
N
LI
N/
GP
S
BU
FFEN
PMix_
I
N
V
CC_DIG
GLNA_OUT
PL
O
_
IN
GL
O_I
N
GND
GM
ix
_I
N
PL
O
_
O
U
T
24 23 22 21 20 19
7 8 9 10 11 12
18
17
16
15
14
13
1
2
3
4
5
6
GMix_Out+
3
T0352
4579ASCDMA11/02
Pin Description
Pin
Symbol
Function
1
Iset_PCS
Bias resistor for K-PCS LNA. For typical bias use a 560
W
resistor to ground which set the bias current
for HGHL mode.
2
PLNA_IN
PCS LNA input. Requires a DC blocking capacitor and an L-C (shunt C/series L) matching network for
optimum gain, intercept and noise performance.
3
Vcc_LNA
Power supply pin for K-PCS LNA. Bypass with a capacitor as close to the pin as possible.
4
GLNA_IN
GPS LNA input. Requires LC match, see Pin 2.
5
GLNA_GND
GPS LNA emitter-ground. The LNA emitter ground should be grounded immediately to the ground
plane to reduce stray inductance and capacitance that may affect performance.
6
Vcc_LO
Supply voltage for LO buffer.
7
GLNA_OUT
GPS LNA output
.
8
PLO_IN
K-PCS LO input.
9
GLO_IN
GPS LO input.
10
GND
Device ground.
11
GMix_IN
GPS mixer input.
12
PLO_OUT
K-PCS LO buffer output. Internally matched to 100
W
. Does not require a blocking capacitor.
13
GMix_OUT-
Negative GPS IF output.
14
GMix_OUT+
Positive GPS IF output.
15
Vcc_Mix
Supply voltage for all mixers.
16
GND
Device ground.
17
PMix_OUT-
Negative CDMA IF output.
18
PMix_OUT+
Positive CDMA IF output.
19
Vcc_DIG
Supply voltage for logic control circuits.
20
PMix_IN
K-PCS Mixer RF input.
21
BUFFEN
LO output buffer enable. Set BUFFEN pin HIGH to power up the PCS LO buffer output.
22
LIN/GPS
23
PCS_ON
Logic input for activating PCS LNA; Logic high selects PCS. Logic low
means inactive.
24
PLNA_OUT
PCS LNA output. Requires a pull-up inductor to Vcc and a series blocking capacitor, which can be
used as the output matching network.
Paddle
Device ground and heat sink, requires good thermal path; RF reference plane.
4
T0352
4579ASCDMA11/02
Absolute Maximum Ratings
Parameters
Symbol
Value
Unit
Supply voltages, no RF applied
V
CC
-0.5 to +4.0
V
Logic control voltages
V
CTRL
-0.5 to + V
CC
+0.5
V
Supply current
I
CC
50.0
mA
RF and LO input signals
P
LO ;
G
LO;
PLNA_IN;
GLNA_IN;
5.0 dBm
I
SET_PCS
; I
SET_CELL
LNA IP3
Adjustment
1
mA
Operating case temperature
T
C
-40 to +100
C
Storage temperature
T
STG
-55 to +150
C
Thermal Resistance
Parameters
Symbol
Value
Unit
Junction ambient
R
thJA
TBD
K/W
DC Supply Characteristics
Test conditions: Unless otherwise noted, the following conditions apply to typical performance specification under static
conditions (no RF applied): V
CC
= +2.75 V, T
amb
= 25C.
No.
Parameters
Test Conditions
Pin
Symbol
Min.
Typ.
Max.
Unit
Type*
All Modes
Supply voltage
3, 15, 19
V
CC
2.7
2.8
3.3
V
Control voltage
high
23, 21, 22
V
CTRL
1.7
V
Control voltage low
21, 22, 23
V
CTRL
0.5
V
LO Rx buffer
supply current
15
I
CC_MIX
7.0
mA
LO Tx buffer
current
BUFFEN = High
15
I
CC_MIX
6.0
mA
Logic-high current
21, 22, 23
I
CTRL
100
A
Logic-low current
21, 22, 23
I
CTRL
-5.0
A
Power-down
supply current
PCS_On, LIN = Low
3, 13, 14,
15, 17, 18,
19, 24
I
CC
10
A
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
5
T0352
4579ASCDMA11/02
AC Electrical Characteristics
Test conditions: Unless otherwise noted, the following conditions apply to typical performance specification under static
conditions: V
CC
= +2.75 V, T
amb
= 25C, all RF inputs and outputs with a return loss of 10 dB minimum.
No.
Parameters
Test Conditions
Pin
Symbol
Min.
Typ.
Max.
Unit
Type*
General Performance
Operating frequency
range
K-PCS band
2, 20
f
PCS
1840
1855
1870
MHz
A-GPS band
4, 11
f
GPS
1575.42
MHz
LO frequency range
K-PCS band:
IF = 183.6 MHz
8
f
LOPCS
1656
1686
MHz
8
f
LOPCS
2023
2053
MHz
GPS band:
IF = 183.6 MHz
9
f
LOGPS
1391.82
MHz
9
f
LOGPS
1759.02
MHz
IF frequency range
K-PCS and GPS
Band
13, 14,
17, 18
f
IF
80
85
230
MHz
LO input power level
K-PCS and GPS
Band
8, 9
P
LO
-10
-5
0
dBm
LO Tx buffer output
power level
K-PCS band; not
matched at dedicated
frequency
12
P
LOOUT
-8
-3
dBm
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
Cascade RF Electrical Characteristics (K-PCS Band)
Test conditions: Unless otherwise noted, the following conditions apply to typical performance specification under static
conditions: V
CC
= +2.75 V, T
amb
= 25C, RF = 1960 MHz; LO = 2045 MHz; IF = 85 MHz; LO input = -5.0 dBm; RF input = -
30 dBm (high gain mode)
No.
Parameters
Test Conditions
Pin
Symbol
Min.
Typ.
Max.
Unit
Type*
Combined LNA and Mixer Performance (CDMA Modulation)
High-gain High-linearity Mode (HGHL)
Gain
PCS_On = High;
LIN = High
G
26
dB
Noise figure
NF
2.2
dB
Input IP3
IIP3
-1.5
dBm
Supply current
I
CC
30
mA
High-gain Low-linearity Mode (HGLL, Paging Mode)
Gain
PCS_On = High;
LIN = Low
G
25.3
dB
Noise figure
NF
2.2
dB
Input IP3
IIP3
-5.3
dBm
Supply current
I
CC
24
mA
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
PDF 
ZIP