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MAX2670
GPS/GNSS Front-End Amplifier
AC ELECTRICAL CHARACTERISTICS (continued)
(V CC = 3.0V to 5.5V, P IN = -40dBm, f IN = 1575MHz, T A = -40 N C to +105 N C. Typical values are at 5.0V and at T A = +25 N C. Input
matched to 50 I , load = 50 I , pin 7 open, unless otherwise noted.) (Note 1)
PARAMETER
AMP 2 Output Third-Order
Intercept Point
SYMBOL
OIP3
CONDITIONS
Two tones at 1574.5MHz and 1575.5MHz,
-30dBm per tone
MIN
TYP
16.0
MAX
UNITS
dBm
AMP 2 Output 1dB Compression
Point
5.3
dBm
AMP 2 Input Return Loss
AMP 2 Output Return Loss
AMP 2 Reverse Isolation
| S 11 |
| S 22 |
| S 12 |
-21
-8.8
-25
dB
dB
dB
Note 1: T A = +25 N C and T A = +105 N C are guaranteed by production test. At T A = -40 N C, the minimum and maximum values are
guaranteed by design and characterization, unless otherwise noted.
Note 2: Measured using the MAX2670 evaluation board with a DC-blocking capacitor at the input of LNA 1.
Note 3: At T A = +25 N C, the maximum value is guaranteed by design and characterization. Specification is corrected for board
losses on the MAX2670 EV kit.
Typical Operating Characteristics
(P IN = -40dBm, f IN = 1575MHz, inputs and outputs are terminated to 50 I , V CC = 5.0V, T A = +25 N C, unless otherwise noted.)
AMP 1 NOISE FIGURE vs. TEMPERATURE
(WITHOUT EXTERNAL INPUT IMPEDANCE MATCH)
1.4
1.3
5.5
5.0
AMP 2 NOISE FIGURE vs. TEMPERATURE
27.5
SUPPLY VOLTAGE vs. CURRENT
(PIN 7 OPEN)
T A = +105°C
1.2
1.1
1.0
0.9
0.8
0.7
4.5
4.0
3.5
3.0
2.5
2.0
1.5
LOW-GAIN MODE
HIGH-GAIN MODE
26.5
25.5
24.5
23.5
22.5
T A = +85°C
T A = +25°C
T A = -40°C
0.6
-40
-20
0
20
40
60
80
100
1.0
-40
-20
0
20
40
60
80
100
21.5
3.0
3.5
4.0
4.5
5.0
5.5
TEMPERATURE (°C)
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
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