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Integrated L1-Band GPS Receiver
AC ELECTRICAL CHARACTERISTICS (continued)
(Operating conditions (unless otherwise specified): V CC = 2.7V to 3.0V for T A = -40°C to +85°C; REFCLK driven at 10MHz sinusoid,
1.2V P-P ; registers set according to mode; using the Typical Application Circuit ; CW RF signal at 1575.42MHz. Typical values are mea-
sured at V CC = 2.75V, T A = +25°C.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
2nd CONVERSION STAGE (1st IF TO ADC INPUT)
1st IF Frequency
At IFOUT
37.38
MHz
Conversion Gain
Input IP3
Noise Figure
IF Output Port Admittance
IF Input Port Admittance
LPF -3dB Corner Frequency
Max gain (CONFIG1:D4–D0 = 11111) (Note 1)
Min gain (CONFIG1:D4–D0 = 00000) (Note 1)
1st conversion (Note 5)
Max gain (CONFIG1:D4–D0 = 11111)
Real
Imaginary
Real
Imaginary
(SYNTH:D13–D10 = 1111)
(SYNTH:D13–D10 = 0000)
48
61
10
-36
12
0.40
1.5
0.40
0.15
2.9
7.7
74
dB
dB
dBm
dB
mS
pF
mS
pF
MHz
SYNTHESIZER
I CP_OH
I CP_OL
Closed-Loop Phase Noise
Comparison Spurs
PLL charge-pump source current
PLL charge-pump sink current
At 1kHz offset
At ±200kHz offset
75
-100
-55
-44
μA
μA
dBc/Hz
dBc/Hz
Reference Oscillator Frequency
REF Input Voltage Level
VCO Coarse Tune Range
Sinusoid (Note 1)
Sinusoid (Note 1)
Programmable (CONFIG1:D7 to D5 = 000 to 111)
(Note 1)
2
0.6
10
240
26
2.2
MHz
V P-P
MHz
DIGITAL I/O
SPI Clock Frequency
Production tested for +25°C and +85°C, guaranteed by design and characterization for -40°C.
Note 1:
Test tones at 1575.8MHz and 1576.8MHz at -60dBm/tone.
Note 2:
Guaranteed by design and characterization.
Note 3:
Image frequency is 1575.42MHz + 2(f IF ) = 1650.18MHz
Note 4:
Test tones at 37.38MHz and 36.88MHz at -50dBm/tone.
Note 5:
1
MHz
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3
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