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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX2371 Datasheet

(MAX2371 / MAX2373) LNAs

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19-2301; Rev 1; 10/06
EVAALVUAAILTAIOBNLEKIT
LNAs with Step Attenuator and VGA
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
Ordering Information
PART
TEMP RANGE
MAX2371EGC -40°C to +85°C
MAX2371ETC -40°C to +85°C
MAX2371ETC+ -40°C to +85°C
MAX2373EGC -40°C to +85°C
MAX2373ETC -40°C to +85°C
MAX2373ETC+ -40°C to +85°C
*EP = Exposed pad.
+Denotes lead-free package.
PIN-
PACKAGE
12 QFN-EP*
12 TQFN-EP*
12 TQFN-EP*
12 QFN-EP*
12 TQFN-EP*
12 TQFN-EP*
PKG
CODE
G1233-1
T1233-3
T1233+3
G1233-1
T1233-3
T1233+3
Pin Configuration
Functional Diagram
TOP VIEW
GND RF_VCC RSET
12 11 10
LNA_IN 1
LNA_E 2
RX_EN 3
MAX2371
MAX2373
9 AGC_BYP
8 LNA_VCC
7 LNA_OUT
4 56
RF_ATTN AGC LNA_I
QFN/TQFN
LNA_IN
LNA_E
RX_EN
GND RF_VCC
RSET
RF
ATTENUATOR
MAX2371
MAX2373
LNA
AGC
AMP
EXPONENTIAL
CONVERTER
RF_ATTN
AGC
LNA_I
AGC_BYP
LNA_VCC
LNA_OUT
________________________________________________________________ Maxim Integrated Products 1
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.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX2371 Datasheet

(MAX2371 / MAX2373) LNAs

No Preview Available !

LNAs with Step Attenuator and VGA
ABSOLUTE MAXIMUM RATINGS
VCC to GND ...........................................................-0.3V to +3.6V
All Pins Excluding Grounds to Pin GND.....-0.3V to (VCC + 0.3V)
LNA Input Power (RX_EN = low) ........................................5dBm
Continuous Power Dissipation (TA = +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
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.
DC ELECTRICAL CHARACTERISTICS
(VCC = 2.775V, RX_EN = high, RSET = 1.1kΩ, VAGC = VCC/2, TA = -40°C to +85°C. Typical values are at TA = +25°C, unless other-
wise noted.)
PARAMETER
Supply Voltage
Supply Current
Digital Input Logic High
Digital Input Logic Low
Logic Pin Impedance
AGC Pin Impedance
SYMBOL
VCC
ICC
VIH
VIL
CONDITIONS
RX_EN = low, VCC = 3.3V
LNA_I = high, RF_ATTN = low
LNA_I = low
Pins LNA_I, RF_ATTN, RX_EN
Pins LNA_I, RF_ATTN, RX_EN
Logic pins RX_EN, RF_ATTN, LNA_I
Pins AGC
MIN TYP MAX
2.65 2.775 3.30
0.5 20
3.5 5.5
2.5 3.5
0.7 VCC
VCC
0 0.3 VCC
50
100
UNITS
V
µA
mA
mA
V
V
kΩ
kΩ
AC ELECTRICAL CHARACTERISTICS
(MAX2371/MAX2373 EV Kits, VCC = 2.65V to 3.3V, RX_EN = high, RSET = 1.1kΩ, TA = -40°C to +85°C. Typical values are at VCC =
2.775V; for MAX2371 fRF = 150MHz, for MAX2373 fRF = 850MHz to 940MHz; TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
CONDITIONS
LNA AND AGC AMP CHARACTERISTICS
Radio Frequency Range (Note 2)
Low band (MAX2371)
High band (MAX2373)
Input Return Loss (S11)
(Note 3)
LNA_I = high;
RF_ATTN = low
LNA_I = high;
RF_ATTN = high
MAX2371
MAX2373
MAX2371
MAX2373
Reverse Isolation (S12)
Over AGC range
MAX2371
MAX2373
Max Power Gain (Note 3)
LNA_I = high, TA =
+25°C, VCC = 2.775V
LNA_I = low, TA =
+25°C, VCC = 2.775V
MAX2371
MAX2373
MAX2371
MAX2373
Gain Variation Over Temperature
TA = -40°C to +85°C, VAGC < 1.8V
MIN TYP MAX UNITS
136 150 174
MHz
850 900 940
-12 -9.5
-15 -9.5
-14 -10
dB
-10 -6.5
-40 -35
dB
-42 -35
13 14.5 16
14 15.5
10.5 12
17
dB
10.5 13
-2.0 2.0 dB
2 _______________________________________________________________________________________


Part Number MAX2371
Description (MAX2371 / MAX2373) LNAs
Maker Maxim Integrated Products
Total Page 10 Pages
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MAX2371 Datasheet PDF

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