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LNAs with Step Attenuator and VGA
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX2371/MAX2373 EV Kits, V CC = 2.65V to 3.3V, RX_EN = high, R SET = 1.1k Ω , T A = -40°C to +85°C. Typical values are at V CC =
2.775V; for MAX2371 f RF = 150MHz, for MAX2373 f RF = 850MHz to 940MHz; T A = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V AGC = 1.275V
1.8
2.2
SSB Noise Figure vs. AGC
LNA_I = high, T A =
+25°C, V CC = 2.775V,
RF_ATTN = low
V AGC = 1.575V
V AGC = 1.875V
V AGC = 2.175V
5.0
11
20
7.7
14.5
dB
LNA_I = low, T A =
+25°C, V CC = 2.775V,
V AGC = 1.275V
2.1
2.6
RF_ATTN = low
RF_ATTN = low,
LNA_I = high
-21.5
19.5
Input 1dB Compression Point
V AGC < 1.8V
RF_ATTN = high,
V AGC < 1.8V
LNA_I = low
LNA_I = high
LNA_I = low
-24
-3
-9
-22
0
-6.5
dBm
LNA_I = high
-5
-1
Input IP3 (Notes 4, 5)
RF_ATTN = low,
V AGC = V CC /2
RF_ATTN = high,
V AGC = V CC /2 to 2.575V
LNA_I = low
LNA_I = high
MAX2371
MAX2373
-7
-12
9
-4
-9
13
dBm
dBm
Input IP3 Over AGC Range
RF_ATTN = low, LNA_I = high,
V AGC = V CC /2 to 1.80V
MAX2371
MAX2373
-10.5
-12.5
-8
-10.5
dBm
AGC RESPONSE
AGC Attenuation Range (Note 6)
V CC = 2.775V, RF_ATTN = low, V AGC = 1.3375V
to 2.575V, T A = +25°C
35
45
dB
AGC Slope Over Control Range
RF_ATTN = low, V AGC = 1.625V
RF_ATTN = high, V AGC = 1.625V
32
24
40
33
47
41
dB/V
RF STEP ATTENUATOR
Gain Step
RF_ATTN = high to low,
LNA_I = high
MAX2371
MAX2373
16.0
18.0
17.5
19.5
19.0
21.0
dB
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
Note 6:
Parameters over temperature and supply voltage range are guaranteed by design and characterization, unless otherwise noted.
Operation outside these frequency bands is possible but has not been characterized. See Typical Operating Characteristics .
Measured with external matching network.
f IN1 = 150MHz, f IN2 = 150.1MHz, P IN = -30dBm for both tones (MAX2371).
f IN1 = 900MHz, f IN2 = 900.1MHz, P IN = -30dBm for both tones (MAX2373).
Parameters are guaranteed by production test.
_______________________________________________________________________________________
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