Datasheet

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