MAX2371 MAXIM [Maxim Integrated Products], MAX2371 Datasheet

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MAX2371

Manufacturer Part Number
MAX2371
Description
LNAs with Step Attenuator and VGA
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet

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Part Number:
MAX2371ETC
Manufacturer:
SMSC
Quantity:
300
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.
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.
Direct Conversion Receiver (DCR)
Very Low IF Receiver
LNA_IN
TOP VIEW
LNA_E
RX_EN
1
2
3
________________________________________________________________ Maxim Integrated Products
RF_ATTN
GND
12
4
QFN/TQFN
General Description
MAX2371
MAX2373
RF_V
AGC
11
5
Pin Configuration
LNAs with Step Attenuator and VGA
CC
LNA_I
RSET
10
6
Applications
9
8
7
AGC_BYP
LNA_V
LNA_OUT
CC
♦ Low Noise Figure (1.8dB typical)
♦ High Small-Signal Gain (15dB Nominal)
♦ Wide Frequency Range of Operation
♦ 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
*EP = Exposed pad.
+Denotes lead-free package.
MAX2371EGC
MAX2371ETC
MAX2371ETC+ -40°C to +85°C
MAX2373EGC
MAX2373ETC
MAX2373ETC+ -40°C to +85°C
LNA_IN
LNA_E
RX_EN
(100MHz to 1GHz)
PART
ATTENUATOR
RF_ATTN
GND
RF
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
Ordering Information
EXPONENTIAL
CONVERTER
RF_V
Functional Diagram
LNA
AGC
CC
MAX2371
MAX2373
12 QFN-EP*
12 TQFN-EP*
12 TQFN-EP*
12 QFN-EP*
12 TQFN-EP*
12 TQFN-EP*
PIN-
PACKAGE
AGC
AMP
RSET
LNA_I
Features
G1233-1
T1233+3
G1233-1
T1233+3
T1233-3
T1233-3
CODE
PKG
AGC_BYP
LNA_V
LNA_OUT
CC
1

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MAX2371 Summary of contents

Page 1

... 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- ...

Page 2

... Digital Input Logic Low V Logic Pin Impedance AGC Pin Impedance AC ELECTRICAL CHARACTERISTICS (MAX2371/MAX2373 EV Kits 2.65V to 3.3V, RX_EN = high 2.775V; for MAX2371 f = 150MHz, for MAX2373 f RF PARAMETER LNA AND AGC AMP CHARACTERISTICS Radio Frequency Range (Note 2) Input Return Loss (S11) (Note 3) Reverse Isolation (S12) ...

Page 3

... CC AGC to 2.575V +25°C A RF_ATTN = low 1.625V AGC RF_ATTN = high 1.625V AGC MAX2371 RF_ATTN = high to low, LNA_I = high MAX2373 = -30dBm for both tones (MAX2371 -30dBm for both tones (MAX2373 -40°C to +85°C. Typical values are MIN TYP MAX 1.8 2.2 5.0 7 ...

Page 4

... V (V) AGC S11, S22, S12 vs. V AGC 0 S11 -10 S22 -20 S11 RF_ATTN = HIGH RF_ATTN = LOW -30 -40 S12 -50 -60 1.2 1.7 2.2 2.7 V (V) AGC = +25°C. For MAX2371 150MHz IIP3 vs. V AGC 25 RF_ATTN = HIGH -40° +85° +25° -10 RF_ATTN = LOW -15 1 ...

Page 5

... AGC S11, S22, S12 vs. V AGC 0 -5 S11 -10 -15 S22 -20 -25 S11 -30 RF_ATTN = HIGH RF_ATTN = LOW -35 -40 S12 -45 -50 1.2 1.7 2.2 V (V) AGC = +25°C. For MAX2371 150MHz IIP3 vs. V AGC 20 RF_ATTN = HIGH -40° +25° -10 RF_ATTN = LOW -15 1.3 1.4 1.5 1 ...

Page 6

... LNAs with Step Attenuator and VGA Table 1. MAX2371 S-Parameters (V = 2.775V, RX_EN = high, LNA_I = high, RF_ATTN = low LNA (S11) FREQUENCY (MHz) MAGNITUDE PHASE 10 0.943409 -4.8477 100 0.746965 -29.9420 150 0.728794 -35.6990 200 0.705066 -43.4190 300 0.704636 -55.1180 400 0.719615 -65.2420 500 ...

Page 7

... Table 3. MAX2371 Typical Noise Parameters (V = 2.775V, RX_EN = high, LNA_I = high, RF_ATTN = low FREQUENCY (MHz) NF MIN 130 0.84 140 0.83 150 0.82 160 0.81 170 0.81 180 0.81 ...

Page 8

... Detailed Description The MAX2371/MAX2373 are single-channel, single- ended, low-noise amplifiers with two gain modes and continuous automatic gain control (AGC) in both modes. The devices are intended as low-noise gain 8 _______________________________________________________________________________________ = -30dBm +25°C, data from design simulation ⎜ ...

Page 9

... LNAs with Step Attenuator and VGA The MAX2371/MAX2373 can be turned off in transmit or battery-save standby mode. The receive-enable pin (RX_EN) also can turn off the devices even if V removed, because multiple LNAs can be connected to the same V for multiband applications. CC The devices allow external matching networks to configure operation in a wide frequency range ...

Page 10

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2006 Maxim Integrated Products PRECISION RF_V GND CC MAX2371 MAX2373 RF AGC LNA ATTENUATOR AMP EXPONENTIAL ...

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