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Электронный компонент: T0354

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1
Features
Cell 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
Cell and GPS-mode/Cell and GPS-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 Cell Band CDMA and A-GPS Applications
IM98 IMD Requirements Met With two Gain States Simplifying Calibration Procedure
Best In Class A-GPS Cascade Gain for Maximum Takeover
TX LO Buffer Included
Very Small 24-pin 4 mm x 4 mm Package
Few External Components
Fully ESD Protected
Electrostatic sensitive device.
Observe precautions for handling.
Description
The T0354 is a CDMA front-end receiver RFIC designed for cell-band, cell and GPS-
mode operation. The device supports CDMA operation in the cellular band and A-
GPS operation. The IF range is from 80 MHz to 230 MHz with external tuning. The
cell-band 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 mode), and they feature
excellent linearity and low noise figure.
The T0354 device is available in a 4 mm x 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
Cell CDMA/GPS
T0354
Preliminary
(Summary)
Rev. 4580ASCDMA11/02
2
T0354
4580ASCDMA11/02
Figure 1. Block Diagram
Pin Configuration
Figure 2. Pinning HP-VFQFP-N24
CLO_IN
BUFFEN
Gain
LIN
Co
nt
r
o
l
CLNA_IN
CLO_Out
CDMA_Out+
CDMA_Out-
CL
NA
_
O
UT
CM
i
x
_
I
N
CL
NA
_G
ND
I
s
et
_
C
el
l
2
3
24
20
1
21
23
22
18
17
12
9
GLNA_IN
GMix_Out+
GMix_Out-
GM
ix
_I
N
GL
NA
_O
ut
Vc
c_
Mi
x
5
8
11
15
14
13
Vcc_LO
GLO_IN
10
Vc
c_
L
N
A
4
GPS_GND
6
7
Vcc_DIG
19
ISET_Cell
CLNA_IN
CLNA_GND
Vcc_LNA
GLNA_IN
GLNA_GND
CDMA_OUT+
CDMA_OUT-
GND
VCC_MIX
GMix_Out-
CLNA
_O
UT
Gain
LI
N
BU
FFEN
CM
i
x
_I
N
V
CC_DIG
V
c
c
_LO
GLNA_OUT
CL
O_I
N
GL
O_I
N
GM
ix
_I
N
CLO
_
OUT
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
T0354
4580ASCDMA11/02
Pin Description
Pin
Symbol
Function
1
Iset_Cell
Bias resistor for cell LNA. For typical bias use a 390
W
resistor to ground which sets the bias current for
HGHL mode.
2
CLNA_IN
Cell band LNA input. Requires a blocking capacitor and an LC (shunt C/series L) matching network for
optimum gain, intercept and noise performance.
3
CLNA_GND
Cell band LNA emitter ground. The LNA emitter ground should be connected immediately to the ground
plane to reduce stray inductance and capacitance that may affect performance.
4
Vcc_LNA
Power supply pin for GPS and Cell LNAs. Bypass with a capacitor as close to the pin as possible.
5
GLNA_IN
GPS LNA input. Requires a DC blocking capacitor and an L-C shunt (shunt C/series L) matching network
for optimum gain, intercept and noise performance.
6
GLNA_GND
Cell band LNA emitter ground. The LNA emitter ground should be connected immediately to the ground
plane to reduce stray inductance and capacitance that may affect performance.
7
Vcc_LO_TX
Supply voltage for LO buffers.
8
GLNA_OUT
GPS LNA output.
9
CLO_IN
Cell band LO input.
10
GLO_IN
GPS LO input.
11
GMix_IN
GPS mixer input.
12
CLO_OUT
Cell band 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
CDMA_OUT-
Negative CDMA output.
18
CDMA_OUT+
Positive CDMA output.
19
Vcc_DIG
Supply voltage for logic control circuits.
20
CMix_IN
Cell band mixer RF input.
21
BUFFEN
LO output buffer enable. Set BUFFEN pin HIGH to power up the LO buffer output corresponding to the
selected band.
22
LIN
Logic input for high or low linearity. Logic HIGH selects high linearity.
23
Gain
Logic input for activating Cell LNA; Logic LOW selects low gain.
24
CLNA_OUT
Cell band LNA output. Requires a pull-up inductor to Vcc and a series blocking capacitor, which can be
used as part of the output matching network.
25
Paddle
Device ground and heat sink, requires good thermal path; RF reference plane.
4
T0354
4580ASCDMA11/02
.
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
C
LO;
CLNA_IN; GLNA_IN;
5.0
dBm
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
4, 7, 15,
19
V
cc
2.7
2.8
3.3
V
Control voltage high
21, 22, 23
V
CTRL
1.7
V
Control voltage low
21, 22, 23
V
CTRL
0.5
V
LO Rx buffer supply
current
9, 10
I
CCMIX
8.0
mA
LO Tx buffer current
BUFFEN = High
12
I
CCMIX
5.0
mA
Logic-high current
21, 22, 23
I
CTRL
100
mA
Logic-low current
21, 22, 23
I
CTRL
-5.0
mA
Power down supply
current
Gain, LIN = LOW
4, 7, 15,
19
I
CC
10
A
*) Type means: A =100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
5
T0354
4580ASCDMA11/02
.
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
Cellular band
2
f
CELL
869
881.5
894
MHz
A-GPS band
5
f
GPS
1575.42
MHz
LO frequency range
Cellular band:
IF = 85 MHz
9
f
LOCELL
784
809
MHz
9
f
LOCELL
954
979
MHz
GPS band:
IF = 85 MHz
10
f
LOGPS
1490.04
MHz
10
f
LOGPS
1660.80
MHz
IF frequency range
Cell and GPS band
13, 14, 17,
18
f
IF
80
85
230
MHz
LO Input power level
Cell and GPS band
13, 14, 17,
18
P
LO
-10
-5
0
dBm
LO Tx buffer output
power level
Cellular band; not
matched at
dedicated
frequency
12
P
LOOUT
-8
-5.5
dBm
*) Type means: A =100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
Cascade RF Electrical Characteristics (Cellular 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 = 881.5 MHz; LO = 966.5 MHz; IF = 85 MHz; LO input = -5.0 dBm; RF input = -
35 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
Gain = High;
LIN = High
G
28.5
dB
Noise figure
NF
2.0
dB
Input IP3
IP3
-8.0
dBm
Supply current
I
CC
26
mA
High-Gain Low-Linearity Mode (HGLL. Paging mode)
Gain
Gain = High;
LIN = Low
G
28
dB
Noise figure
NF
2.1
dB
Input IP3
IP3
-10.0
dBm
Supply current
I
CC
19
mA
Low-Gain Mode (LG)
Gain
Gain = Low;
LIN = High
G
12
dB
Noise figure
NF
11
dB
Input IP3
IP3
9.0
dBm
Supply current
I
CC
23
mA
*) Type means: A =100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter