CXA3355ERVQFN SONY [Sony Corporation], CXA3355ERVQFN Datasheet - Page 14

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

5) Image Rejection Ratio
Input: LNA_IN
Output: TESTOUTP (Pin 38), TESTOUTN (Pin 39) ... [Pins 38 and 39 are differential output.]
Serial data setting: Test output block "2" (Adder output block) ... See page 19.
Monitor method: (1) Perform differential – single conversion using an external buffer circuit and measure the
6) Filter Response
Input: LNA_IN
Output: TESTOUTP (Pin 38), TESTOUTN (Pin 39) ... [Pins 38 and 39 are differential output.]
Serial data setting: Test output block "3" (IF filter output block) ... See page 19.
Monitor method: (1) Perform differential – single conversion using an external buffer circuit and measure the
IMRR (detuning frequency
Filter Response: Vary the input frequency to LNA_IN and measure the output level. Normalize fo (4fo) to
(2) Measure Pins 38 and 39 with a differential probe.
(2) Measure Pins 38 and 39 with a differential probe.
the reference (0dB).
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
4MHz): Image wave output level (at 1575.42MHz input) [dBm] –
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
1 (PLL)
1 (LNA)
1 (RF)
1 (IF)
2 (IF)
3 (ANT)
1 (PLL)
1 (LNA)
1 (RF)
1 (IF)
2 (IF)
3 (ANT)
All GND pins
All GND pins
TESTOUTP
TESTOUTP
GND
GND
Desired wave output level (at 1567.236MHz input) [dBm]
output level. ... [Sony recommended method]
LNA_IN
output level. ... [Sony recommended method]
LNA_IN
IC
IC
Microwave coaxial cable
TESTOUT
TESTOUTN
TESTOUT
TESTOUTN
External
buffer
External
buffer
Microwave coaxial cable
Microwave coaxial cable
Microwave coaxial cable
TCXO
TCXO
– 14 –
Microwave coaxial cable
Microwave coaxial cable
50
50
Spectrum Analyzer
50
Center freq. = 150kHz to 100MHz
SPAN = 10kHz
RBW = 100Hz
VBW = 100Hz
50
Signal Generator
freq. = 1575.42MHz (Desired wave)
AMP. = –75dBm
Spectrum Analyzer
50
50
Center freq. = 4.092MHz
SPAN = 10kHz
RBW = 100Hz
VBW = 100Hz
Signal Generator
freq. = 1571.388MHz to
AMP. = –75dBm
1567.236MHz (Image wave)
Signal Generator
Signal Generator
freq. = 16.368MHz
AMP. = 0dBm
freq. = 16.368MHz
AMP. = 0dBm
1675.42MHz
CXA3355ER