CXA3355ERVQFN SONY [Sony Corporation], CXA3355ERVQFN Datasheet - Page 15

• Manufacturer Part Number: CXA3355ERVQFN
• Description: GPS Down Converter IC
• Manufacturer: SONY [Sony Corporation]

7) C/N
Input: LNA_IN
Output: TESTOUTP (Pin 38), TESTOUTN (Pin 39) ... [Pins 38 and 39 are differential output.]
Serial data setting: Test output block "1I" (Ich mixer output block) ... See page 19.
Monitor method: (1) Perform differential – single conversion using an external buffer circuit and measure the
8) Spurious
Input: LNA_IN
Output: TESTOUTP (Pin 38), TESTOUTN (Pin 39) ... [Pins 38 and 39 are differential output.]
Serial data setting: Test output block "4" (IF AMP2 output block) ... See page 19.
Measure the spurious components separated by a certain frequency from the carrier.
C/N: Carrier + 100kHz noise level – Carrier level [dBc/Hz]
Spurious: Each spurious output level – Carrier level [dBc]
(2) Measure Pins 38 and 39 with a differential probe.
V
V
OPEN
OPEN
CC
CC
= 1.8V
= 1.8V
Evaluation
Board
Evaluation
Board
V
V
V
V
V
V
ENABLE
V
V
V
V
V
V
ENABLE
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
All GND pins
1 (PLL)
1 (LNA)
1 (RF)
1 (IF)
2 (IF)
3 (ANT)
All GND pins
1 (PLL)
1 (LNA)
1 (RF)
1 (IF)
2 (IF)
3 (ANT)
TESTOUTP
TESTOUTP
GND
GND
LNA_IN
LNA_IN
output level. ... [Sony recommended method]
IC
IC
TESTOUT
TESTOUT
TESTOUTN
TESTOUTN
External
buffer
External
buffer
Microwave coaxial cable
Microwave coaxial cable
TCXO
TCXO
Microwave coaxial cable
– 15 –
Microwave coaxial cable
Microwave coaxial cable
Microwave coaxial cable
50
50
50
50
Spectrum Analyzer
Spectrum Analyzer
50
50
Center freq.
SPAN = 10kHz
RBW = 100Hz
VBW = 100Hz
Center freq. = 4.092MHz
SPAN = 10kHz
RBW = 100Hz
VBW = 100Hz
(Carrier) = 4.092MHz
(Noise) = 4.192MHz
Signal Generator
Signal Generator
freq. = 1575.42MHz
AMP. = –60dBm
Signal Generator
freq. = 1575.52MHz
AMP. = –120dBm
Signal Generator
freq. = 16.368MHz
AMP. = 0dBm
freq. = 16.368MHz
AMP. = 0dBm
CXA3355ER