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MAX12000 Datasheet, PDF (3/9 Pages) Maxim Integrated Products – 1575MHz GPS Front-End Amplifier
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1575MHz GPS Front-End Amplifier
AC ELECTRICAL CHARACTERISTICS (continued)
(VCC = +3.0V to +5.5V, PIN = -40dBm, fIN = 1575MHz, TA = -40°C to +85°C. Typical values are at +5.0V and at TA = +25°C. Input
matched to 50Ω, load = 50Ω, pin 7 open, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
AMP 2 Input Return Loss
⏐S11⏐
-21
dB
AMP 2 Output Return Loss
AMP 2 Reverse Isolation
⏐S22⏐
⏐S12⏐
-8.8
dB
-25
dB
Note 1: At TA = -40°C, the minimum and maximum values are guaranteed by design and characterization, unless otherwise noted.
Note 2: At TA = -40°C and +105°C, the maximum value is guaranteed by design and characterization.
Note 3: Measured using MAX12000 evaluation board with a DC-blocking capacitor at the input of LNA 1.
Note 4: At TA = +25°C, the maximum value is guaranteed by design and characterization. Specification is corrected for board
losses on the MAX12000 EV kit.
Typical Operating Characteristics
(PIN = -40dBm, fIN = 1575MHz, inputs and outputs are terminated to 50Ω, VCC = +5.0V, TA = +25°C, unless otherwise noted.)
AMP 1 NOISE FIGURE vs. TEMPERATURE
(WITHOUT EXTERNAL INPUT IMPEDANCE MATCH)
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
-40 -20
0 20 40 60 80 100
TEMPERATURE (°C)
AMP 2 NOISE FIGURE vs. TEMPERATURE
5.5
5.0
4.5
LOW-GAIN MODE
4.0
3.5
3.0
2.5
2.0
HIGH-GAIN MODE
1.5
1.0
-40 -20
0 20 40 60 80 100
TEMPERATURE (°C)
SUPPLY VOLTAGE vs. CURRENT
(PIN 7 OPEN)
27.5
TA = +105°C
26.5
TA = +85°C
25.5
24.5
TA = +25°C
23.5
22.5
21.5
3.0
TA = -40°C
3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
AMP 1 GAIN vs. SUPPLY VOLTAGE
(WITH EXTERNAL INPUT IMPEDANCE MATCH)
18.1
18.0
TA = -40°C
17.9
17.8
TA = +25°C
17.7
17.6
TA = +85°C
17.5
17.4
TA = +105°C
17.3
3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
AMP 2 GAIN vs. SUPPLY VOLTAGE
(PIN 7 OPEN)
18.0
17.5
17.0
16.5
16.0
15.5
3.0
TA = -40°C
TA = +25°C
TA = +85°C
TA = +105°C
3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
AMP 2 GAIN vs. SUPPLY VOLTAGE
(PIN 7 SHORT TO GND)
15.0
14.5
14.0
13.5
13.0
12.5
12.0
3.0
TA = -40°C
TA = +25°C
TA = +85°C
TA = +105°C
3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
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