LNAs with Step Attenuator and VGA
MAX2371/MAX2373
Typical Operating Characteristics
(MAX2371/MAX2373 EV Kits, V
CC
= 2.775V, RX_EN = high, R
SET
= 1.1kΩ, LNA_I = high, T
A
= +25°C. For MAX2371, f
RF
= 150MHz;
for MAX2373, f
RF
= 900MHz, unless otherwise noted.)
MAX2371
GAIN vs. FREQUENCY
MAX2371 toc01
GAIN vs. V
AGC
MAX2371 toc02
IIP3 vs. V
AGC
RF_ATTN = HIGH
20
15
IIP3 (dBm)
10
5
0
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
MAX2371 toc03
20
RF_ATTN = LOW
15
10
GAIN (dB)
5
0
-5
-10
130
140
150
160
170
RF_ATTN = HIGH
T
A
= +85°C T
A
= +25°C
T
A
= -40°C
20
RF_ATTN = LOW
10
0
GAIN (dB)
-10
-20
-30
-40
-50
-60
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
RF_ATTN = HIGH
25
-5
-10
RF_ATTN = LOW
-15
2.8
1.3
1.4
1.5
1.6
1.7
1.8
180
1.2
1.6
2.0
V
AGC
(V)
2.4
FREQUENCY (MHz)
V
AGC
(V)
P
1dB
vs. V
AGC
MAX2371 toc04
NOISE FIGURE vs. V
AGC
MAX2371 toc05
S11, S22, S12 vs. FREQUENCY
-5
-10
S11, S22, S12 (dB)
-15
-20
-25
-30
-35
RF_ATTN = LOW
RF_ATTN = HIGH
S11
S22
MAX2371 toc06
10.0
5.0
0
P
1dB
(dBm)
-5.0
-10.0
-15.0
RF_ATTN = LOW
-20.0
-25.0
1.2
1.7
V
AGC
(V)
2.2
2.7
T
A
= -40°C
T
A
= +25°C
T
A
= +85°C
RF_ATTN = HIGH
30
RF_ATTN = HIGH
25
NOSIE FIGURE (dB)
20
15
10
RF_ATTN = LOW
5
0
1.2
1.7
V
AGC
(V)
2.2
2.7
0
-40
-45
-50
130
140
150
160
170
180
FREQUENCY (MHz)
S12
S11, S22, S12 vs. V
AGC
S11
-10
S11, S22, S12 (dB)
-20
-30
-40
-50
-60
1.2
1.7
V
AGC
(V)
2.2
2.7
S12
S22
S11
RF_ATTN = LOW
RF_ATTN = HIGH
MAX2371 toc07
0
4
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
