Rainbow Electronics MAX2740 - Manual (Page 3)

MAX2740
Integrated GPS Receiver and Synthesizer
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0
20
10
40
30
60
50
70
I CC vs. TEMPERATURE AND V CC
MAX2740-01
TEMPERATURE ( °C)
CURRENT (mA)
-40 -30 -10 60 0 10 20 30 40 50 80 70 -20
V
CC
= 3.0V
V CC = 3.3V
V CC = 2.7V
20
18
16
14
12
10
8
6
4
2
0
LNA GAIN vs. TEMPERATURE AND V CC
MAX2740-02
TEMPERATURE ( °C)
GAIN
(dB)
-40 -30 -10 60 0 10 20 30 40 50 80 70 -20
V CC = 3.0V
V CC = 3.3V
V CC = 2.7V
0
15
10
5
20
25
35
30
40
IF MIXER GAIN vs.
TEMPERATURE AND V CC
MAX2740-03
TEMPERATURE (°C)
GAIN (dB)
-40 -30 -10 60 0 10 20 30 40 50 80 70 -20
V CC = 2.7V
V CC = 3.3V
V CC = 3.0V
0
10
5
25
20
15
30
35
40
45
FGA GAIN vs. TEMPERATURE AND V CC
MAX2740-05
TEMPERATURE (°C)
GAIN (dB)
-40 -30 -10 60 0 10 20 30 40 50 80 70 -20
V CC = 2.7V
V CC = 3.3V
V CC = 3.0V
0
10
5
15
20
25
RF MIXER GAIN
vs. TEMPERATURE AND V CC
MAX2740-06
TEMPERATURE ( °C)
GAIN (dB)
-40 -30 -10 60 0 10 20 30 40 50 80 70 -20
V
CC
= 2.7V
V CC = 3.3V
V CC = 3.0V
Typical Operating Characteristics
(T A = +25°C, unless otherwise noted.)
Note 1: Guaranteed by design and characterization.
Note 2: Two tones at pin = -35dBm per tone, f1 = 1575MHz, f2 = 1576MHz.
Note 3: Two tones at pin = -40dBm per tone, f1 = 1575MHz, f2 = 1576MHz.
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX2740 EV kit, V CC = +3.0V, 50 Ω system impedance, F
RF = 1575.42MHz, F IF1 = 135.42MHz, F IF2 = 15.42MHz, F REF = 20MHz at
600mVpp, T A = +25°C, unless otherwise noted.)
PARAMETER CONDITIONS MIN TYP MAX UNITS
VOLTAGE-CONTROLLED OSCILLATOR (VCO) (100kHz offset)
Synthesizer VCO Phase Noise -91.5 dBc/Hz
Output Frequency for External
GLONASS Tuner
90 MHz
Magnitude GLS_OUT R l = 500 Ω, C
l = 10pF 300 mVp-p
PFD Swing on Up and Down
Outputs
Mag (UP-DOWN) 250 mV
-60
-40
-50
-10
-20
-30
0
10
20
30
1.0 1.2 1.4 1.6 1.8 2.0
VGA GAIN vs. VGC AND
TEMPERATURE AT V CC = 3.0V
MAX2740-04
AGC CONTROL VOLTAGE (V)
VGA GAIN (dB)
2.4 2.2
T A = +25 °C
T
A
= +85 °C
T A = -40 °C