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Single-Chip Global Positioning System
Receiver Front-End
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX2742 EV kit, V DD = +2.4V to +3.6V, V SHDN = V DD , T A = -40 ° C to +85 ° C. Typical values are at V DD = +3V and T A = +25 ° C,
unless otherwise noted.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
SYNTHESIZER
TCXO Input Frequency
Charge-Pump Current
Phase Noise
Comparison Frequency Spur
Fundamental frequency crystal
f OFFSET = 10kHz offset, BW LOOP = 70kHz
f OFFSET = 1MHz offset, BW LOOP = 70kHz
BW LOOP = 70kHz
18.414
0.4
-71
-106
-66
MHz
mA
dBc/Hz
dBc
VCO Turning Range
VCO Tuning Gain
(Notes 2, 3)
(Notes 2, 3)
148
139
210
200
277
305
MHz
MHz/V
IF STAGE
IF Stage Gain
Dynamic Range IF Stage Gain
Bandpass Filter 1dB Corner
Frequency
Bandpass Filter 60dB High-Side
Rejection
Image Rejection
In-Band Ripple
AGC Loop Lock Time
VGA set at maximum gain
Low-frequency corner
High-frequency corner
77
50
0.1
3.2
5.0
18
1
1
dB
dB
MHz
MHz
dB
dB
ms
Note 1: At T A = +25°C, min/max limits are guaranteed by production test.
Note 2: At T A = -40°C, min/max limits are guaranteed by design and characterization.
Note 3: At T A = +25°C and +85°C, min/max limits are guaranteed by production test.
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