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GPS Down Converter IC
CXA3355AER
Description
The CXA3355AER is an IC developed as a GPS RF down converter. This IC realizes a reduction in the number of external parts by integrating an LNA, image rejection mixer, IF filter, PLL and VCO (L, C) into a small package with low current consumption. (Applications: GPS down converter IC)
Features
Includes all functions required for the GPS down converter Low voltage operation: VCC = 1.6 to 2.0V Low current consumption (active mode): 11mA (Typ. at VCC = 1.8V, IF ≈ 1MHz) Low current consumption (power save mode) < 1μA Total gain ≈ 100dB Total NF ≈ 4dB On-chip VCO and PLL Supports typical TCXO frequencies (13MHz, 16.368MHz, 18.414MHz, etc.) On-chip LNA (LNA NF: 2.0dB) Image rejection mixer On-chip IF filter, and an external filter can be connected as an option for further band narrowing. 1-bit IF output Antenna sense function
Structure
SiGe BiCMOS monolithic IC
Package
44 pin VQFN (Plastic)
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
-1-
E06702-CR
CXA3355AER
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Absolute Maximum Ratings
(Ta = 25°C) Supply voltage VCC1 VCC2 VCC3 Topr Tstg –0.2 to +2.5 –0.2 to +3.6 –0.2 to +3.6 –40 to +85 –65 to +150 V V V
°C °C
Operating temperature Storage temperature
Recommended Operating Conditions
Supply voltage VCC1 VCC2 VCC3 1.6 to 2.0 1.6 to 3.3 2.7 to 3.3 V V V
-2-
CXA3355AER
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Block Diagram and Pin Configuration
VCC1 (LNA) GND (LNA)
23 22 GND (LNA) RF_AMP VCC1 (RF) 35 Mixer TESTINP 36 1536fo [1539fo] TESTINN 37 4fo [fo] IF_AMP1 90° 19 C_VCO Mixer 20 VCO_I LNA 21 GND (LNA) 18 GND DMPS TESTOUTN 39 IF Phase Shifter VCC1 (IF) 40 RC ×2 16 VCC1 (PLL) MC SC PFD CP 17 LPF 15 GND (PLL) 14 TCXO IF_AMP2 ENABLE 43 LPF HPF A/D Converter 13 CLK_OUT CTL 12 LT 5 6 7 8 9 10 11
LNA_OUT
GND (RF)
GND (RF)
RF_INN
RF_INP
33 VCC1 (RF) 34
32
31
30
29
28
27
26
25
24
1540fo = 1575.42MHz
TESTOUTP 38 IF_AMP1
PLL
GND (IF) 41
R_EXT1 42
R_EXT2 44 1
BIAS 2 3
ANT SENSE 4
VCC2 (IF)
VCC3 (ANT)
DATA_OUT
GND (ANT)
GND (IF)
AILIM
DIAG
ASENS
C_EXT
DATA
LNA_IN
GND
GND
GND
fo mode: IF = 1.023MHz 4fo mode: IF = 4.092MHz
-3-
CLK
CXA3355AER
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Pin Description
Standard pin voltage [V] DC AC
Pin No.
Symbol
Equivalent circuit
Description
VCC3 (ANT)
1 ASENS
—
—
1
Antenna sense input.
GND (ANT)
VCC3 (ANT)
2 DIAG
—
—
2
Antenna sense output.
GND (ANT)
VCC3 (ANT)
3 AILIM
—
—
3
Antenna sense current limitation. Connect to the external PNP transistor base pin.
GND (ANT)
4 GND (ANT) 5 VCC3 (ANT)
0 3.0
— —
Antenna sense GND. Antenna sense VCC. Lea.