Rainbow Electronics MAX2670 - Manual (Page 3)

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MAX2670
GPS/GNSS Front-End Amplifier
Note 1: T
A
= +25NC and T
A
= +105NC are guaranteed by production test. At T
A
= -40NC, 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
= +25NC, the maximum value is guaranteed by design and characterization. Specification is corrected for board
losses on the MAX2670 EV kit.
AC ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 3.0V to 5.5V, P
IN
= -40dBm, f
IN
= 1575MHz, T
A
= -40NC to +105NC. Typical values are at 5.0V and at T
A
= +25NC. Input
matched to 50I, load = 50I, pin 7 open, unless otherwise noted.) (Note 1)
Typical Operating Characteristics
(P
IN
= -40dBm, f
IN
= 1575MHz, inputs and outputs are terminated to 50I, V
CC
= 5.0V, T
A
= +25NC, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
AMP 2 Output Third-Order
Intercept Point
OIP3
Two tones at 1574.5MHz and 1575.5MHz,
-30dBm per tone
16.0 dBm
AMP 2 Output 1dB Compression
Point
5.3 dBm
AMP 2 Input Return Loss |S
11
| -21 dB
AMP 2 Output Return Loss |S
22
| -8.8 dB
AMP 2 Reverse Isolation |S
12
| -25 dB
0.6
0.8
0.7
1.0
0.9
1.1
1.2
1.3
1.4
-40 0 20 -20 40 60 80 100
AMP 1 NOISE FIGURE vs. TEMPERATURE
(WITHOUT EXTERNAL INPUT IMPEDANCE MATCH)
MAX2670 toc01
TEMPERATURE (°C)
NOISE FIGURE (dB)
1.0
2.0
1.5
3.0
2.5
3.5
4.0
4.5
5.5
5.0
-40 0 20 -20 40 60 80 100
AMP 2 NOISE FIGURE vs. TEMPERATURE
MAX2670 toc02
TEMPERATURE (°C)
NOISE FIGURE (dB)
LOW-GAIN MODE
HIGH-GAIN MODE
22.5
21.5
24.5
23.5
26.5
25.5
27.5
3.0 4.0 3.5 4.5 5.0 5.5
SUPPLY VOLTAGE vs. CURRENT
(PIN 7 OPEN)
MAX2670 toc03
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
T A = +105°C
T
A
= +85°C
T A = +25°C
T A = -40°C