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MAX2371ETC+T

P1-P3P4-P6P7-P9P10-P10
General Description
The MAX2371/MAX2373 wideband low-noise amplifier
(LNA) ICs are designed for direct conversion receiver
(DCR) or very low intermediate frequency (VLIF) receiver
applications. They contain single-channel, single-ended
LNAs with switchable attenuator and automatic gain con-
trol (AGC) intended as a low-noise gain stage. These
devices provide high gain-control range (typically 60dB)
at radio frequency (RF) with excellent noise and reverse
isolation characteristics.
The MAX2371/MAX2373 can work over the frequency
range from 100MHz to 1GHz. In practice, only a narrow
band is needed in each application, so different matching
circuits can be applied. The devices are dynamically con-
figured through the digital/analog control pins to select
either maximum gain and low noise figure or power-saving
mode. In addition, the MAX2371/MAX2373 feature
high/low-current modes, high/low attenuation modes, lin-
early controlled gain states, and shutdown mode.
Applications
Direct Conversion Receiver (DCR)
Very Low IF Receiver
Features
♦ Low Noise Figure (1.8dB typical)
♦ High Small-Signal Gain (15dB Nominal)
♦ Wide Frequency Range of Operation
(100MHz to 1GHz)
♦ 20dB Step Attenuator
♦ 45dB AGC Range Excluding Step Attenuator
♦ 2.65V to 3.3V Single-Supply Operation
♦ Shutdown Mode
♦ 3.5mA Supply Current, Adjustable Down to 2.5mA
♦ 40dB Reverse Isolation
MAX2371/MAX2373
LNAs with Step Attenuator and VGA
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
19-2301; Rev 1; 10/06
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
EVALUATION KIT
AVAILABLE
PART
TEMP RANGE
PIN-
PACKAGE
PKG
CODE
MAX2371EGC
-40°C to +85°C
12 QFN-EP*
G1233-1
MAX2371ETC
-40°C to +85°C 12 TQFN-EP*
T1233-3
MAX2371ETC+
-40°C to +85°C 12 TQFN-EP*
T1233+3
MAX2373EGC
-40°C to +85°C
12 QFN-EP*
G1233-1
MAX2373ETC
-40°C to +85°C 12 TQFN-EP*
T1233-3
MAX2373ETC+
-40°C to +85°C 12 TQFN-EP*
T1233+3
TOP VIEW
12
GND
11
RF_V
CC
10
RSET
45
AGC
6
LNA_I
1
2LNA_E
3
9
8
7RX_EN
AGC_BYP
LNA_V
CC
LNA_OUT
MAX2371
MAX2373
LNA_IN
RF_ATTN
QFN/TQFN
Pin Configuration
AGC
RF_V
CC
GND
LNA_OUT
LNA_IN
AGC_BYP
EXPONENTIAL
CONVERTER
AGC
AMP
LNA
RF_ATTN
RF
ATTENUATOR
LNA_V
CC
LNA_I
RX_EN
LNA_E
RSET
MAX2371
MAX2373
Functional Diagram
*EP = Exposed pad.
+Denotes lead-free package.
MAX2371/MAX2373
LNAs with Step Attenuator and VGA
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(V
CC
= 2.775V, RX_EN = high, R
SET
= 1.1kΩ, V
AGC
= V
CC
/2, T
A
= -40°C to +85°C. Typical values are at T
A
= +25°C, unless other-
wise noted.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
V
CC
to GND...........................................................-0.3V to +3.6V
All Pins Excluding Grounds to Pin GND.....-0.3V to (V
CC
+ 0.3V)
LNA Input Power (RX_EN = low) ........................................5dBm
Continuous Power Dissipation (T
A
= +70°C)
12-Pin QFN (derate 11.9mW/°C above +70°C) ...........952mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +160°C
Soldering Temperature (10s) ...........................................+300°C
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
Supply Voltage V
CC
2.65 2.775 3.30
V
RX_EN = low, V
CC
= 3.3V 0.5 20 µA
LNA_I = high, RF_ATTN = low 3.5 5.5 mASupply Current I
CC
LNA_I = low 2.5 3.5 mA
Digital Input Logic High V
IH
Pins LNA_I, RF_ATTN, RX_EN 0.7
✕
V
CC
V
CC
V
Digital Input Logic Low V
IL
Pins LNA_I, RF_ATTN, RX_EN 0
0.3
✕
V
CC
V
Logic Pin Impedance Logic pins RX_EN, RF_ATTN, LNA_I 50 kΩ
AGC Pin Impedance Pins AGC
100
kΩ
AC ELECTRICAL CHARACTERISTICS
(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
LNA AND AGC AMP CHARACTERISTICS
Low band (MAX2371)
136 150 174
Radio Frequency Range (Note 2)
High band (MAX2373)
850 900 940
MAX2371 -12
-9.5
LNA_I = high;
RF_ATTN = low
MAX2373 -15
-9.5
MAX2371 -14 -10
Input Return Loss (S11)
(Note 3)
LNA_I = high;
RF_ATTN = high
MAX2373 -10
-6.5
dB
MAX2371 -40 -35
Reverse Isolation (S12) Over AGC range
MAX2373 -42 -35
dB
MAX2371 13
14.5
16
LNA_I = high, T
A
=
+25°C, V
CC
= 2.775V
MAX2373 14
15.5
17
MAX2371
10.5
12
Max Power Gain (Note 3)
LNA_I = low, T
A
=
+25°C, V
CC
= 2.775V
MAX2373
10.5
13
dB
Gain Variation Over Temperature T
A
= -40°C to +85°C, V
AGC
< 1.8V
-2.0
2.0 dB
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
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
LNA_I = high -5 -1
MAX2371
-7 -4
RF_ATTN = low,
V
AGC
= V
CC
/2
LNA_I = low
MAX2373
-12 -9
Input IP3 (Notes 4, 5)
RF_ATTN = high,
V
AGC
= V
CC
/2 to 2.575V
LNA_I = high 9 13
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
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
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.
P1-P3P4-P6P7-P9P10-P10

MAX2371ETC+T

Mfr. #:
Buy MAX2371ETC+T
Manufacturer:
Maxim Integrated
Description:
RF Amplifier LNAs w/Step Attenuator & VGA
Lifecycle:
New from this manufacturer.
Delivery:
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