MAX2667 MAXIM [Maxim Integrated Products], MAX2667 Datasheet - Page 6

• Manufacturer Part Number: MAX2667
• Description: GPS/GNSS Ultra-Low-Noise-Figure LNAs
• Manufacturer: MAXIM [Maxim Integrated Products]

Table 2. MAX2669 Typical Device S-Parameter Values and K-Factor
GPS/GNSS Ultra-Low-Noise-Figure LNAs
The devices include a shutdown feature to turn off the
entire chip. Apply a logic-high to the SHDN pin to place
the part in the active mode, and a logic-low to place the
part in the shutdown mode.
A properly designed PCB is essential to any RF micro-
wave circuit. Use controlled-impedance lines on all
high-frequency inputs and outputs. Bypass V
Table 1. MAX2667 Typical Device S-Parameter Values and K-Factor
6
FREQ.
FREQ.
(MHz)
(MHz)
1000
1100
1200
1300
1400
1500
1575
1600
1700
1800
1900
2000
1000
1100
1200
1300
1400
1500
1575
1600
1700
1800
1900
2000
S11 MAG
S11 MAG
(dB)
(dB)
-3.0
-3.3
-3.5
-3.8
-4.3
-4.9
-5.3
-5.4
-5.5
-5.3
-5.1
-4.9
-2.0
-2.1
-2.2
-2.4
-2.7
-6.5
-4.3
-4.6
-5.4
-5.2
-4.8
-4.5
Applications Information
(Degrees)
(Degrees)
PHASE
PHASE
-47.7
-48.6
-51.6
-55.0
-57.0
-58.2
-60.0
-62.3
-63.3
-62.0
-59.7
-58.5
-53.7
-50.3
-48.0
-46.3
-58.6
-61.9
-62.3
-61.6
-55.3
-49.8
-47.3
-46.7
S11
S11
S21 MAG
S21 MAG
(dB)
(dB)
12.0
14.0
16.2
17.1
10.8
11.6
13.4
14.9
15.9
16.6
16.6
16.5
15.8
14.7
13.4
12.7
17.3
17.1
15.7
13.9
12.7
6.0
7.4
9.6
Shutdown
CC
(Degrees)
(Degrees)
PHASE
PHASE
-120.0
-124.5
-134.6
-148.0
-162.3
-178.9
-100.0
-100.6
-107.3
-117.2
-129.5
-146.5
-164.2
-170.6
168.0
163.9
149.3
136.8
130.0
123.9
165.5
145.8
135.2
127.3
S21
S21
with
S12 MAG
S12 MAG
decoupling capacitors located close to the device. For
long V
capacitors. Locate these additional capacitors further
away from the device package. Proper grounding of
the GND_ pins is essential. If the PCB uses a topside
RF ground, connect it directly to the GND_ pins. For a
board where the ground is not on the component layer,
connect the GND_ pins to the board with multiple vias
close to the package.
-43.0
-42.1
-39.3
-37.2
-35.4
-33.9
-33.5
-33.6
-33.6
-47.5
-45.7
-42.9
-39.6
-37.0
-34.1
-32.9
-32.8
-32.5
-33.8
-35.2
-36.7
-34.2
-35.1
-35.8
(dB)
(dB)
CC
lines, it may be necessary to add decoupling
(Degrees)
(Degrees)
PHASE
PHASE
-154.0
-155.0
-160.5
-168.3
-178.2
-148.0
-150.0
-153.5
-160.2
-168.5
171.0
161.7
157.5
148.3
142.5
139.6
138.6
178.5
162.8
156.6
136.5
121.6
113.8
109.6
S12
S12
S22 MAG
S22 MAG
-14.5
-19.6
-15.3
-20.6
-16.7
(dB)
(dB)
-1.3
-1.6
-2.4
-4.0
-7.3
-1.0
-1.0
-1.4
-2.1
-3.6
-7.4
-9.5
-4.5
-2.7
-1.8
-9.0
-5.7
-4.0
-3.0
(Degrees)
(Degrees)
PHASE
PHASE
-101.0
-100.6
-100.0
-100.8
-65.0
-70.2
-79.6
-90.0
-26.0
-15.0
-55.0
-58.1
-65.4
-74.1
-85.5
-78.9
-13.2
-21.2
10.0
S22
S22
-6.0
-2.8
-9.6
-2.4
3.6
3.2
3.3
2.8
2.7
2.7
2.6
2.5
2.5
2.3
2.2
2.3
2.1
5.1
3.8
3.1
2.5
2.3
2.8
2.1
2.0
1.8
1.6
1.6
1.5
K
K
f
f