MAX2651 Datasheet, PDF (1/16 Pages) Maxim Integrated Products – GSM900 and DCS1800/PCS1900 Dual-Band, Low-Noise Amplifiers

19-1506; Rev 1; 10/99
GSM900 and DCS1800/PCS1900
Dual-Band, Low-Noise Amplifiers
General Description
Features
The MAX2651/MAX2652/MAX2653 silicon germanium
(SiGe), low-noise amplifiers (LNAs) are intended for use
in GSM900, DCS1800, and PCS1900 band wireless
handsets. The MAX2651/MAX2652 consist of two LNAs,
one optimized for the GSM900 band and the other opti-
mized for the DCS1800/PCS1900 bands. They feature a
band-select pin to switch between the two LNAs, as well
as a gain-step input to reduce the gain of each LNA by
20dB and reduce supply current. The MAX2652 is func-
tionally equivalent to the MAX2651, but features a low-
power shutdown mode. The MAX2653 consists of a
single LNA optimized for the DCS1800 and PCS1900
bands, and has a shutdown feature and a 20dB gain
step.
o Wide Operating Frequency Range
800MHz to 1000MHz (MAX2651/52)
1800MHz to 2000MHz (MAX2651/52/53)
o Excellent Low-Noise Performance
1.2dB/1.3dB over GSM Receive Band
(MAX2651/52)
1.8dB/1.8dB/1.7dB over DCS Receive Band
(MAX2651/52/53)
o High Gain
18dB over GSM Receive Band (MAX2651/52)
18dB/17.5dB/18.5dB over DCS Receive Band
(MAX2651/52/53)
The MAX2652 and MAX2653 together form an ideal
solution for triple-band phone applications (GSM, DCS,
and PCS bands).
The MAX2651/MAX2652/MAX2653 are fabricated using
an advanced high-frequency SiGe bipolar process. As
a result, all devices provide low noise figure, high gain,
and high input third-order intercept point (IP3) perfor-
mance at the GSM, DCS, and PCS bands. A pull-up
resistor to V_CC at each LNA output allows for gain
adjustability. A minimal number of external components
are needed for input and output matching, helping to
reduce board space.
The MAX2651/MAX2652 are packaged in a 10-pin µMAX,
while the MAX2653 is packaged in an 8-pin µMAX. All
devices operate from a single +2.7V to +3.3V supply.
Applications
GSM900/DCS1800 Dual-Band Phones
o 20dB Gain Reduction in Low-Gain Mode
o Externally Adjustable Gain
o +2.7V to +3.3V Single-Supply Operation
o Low Supply Current
5.4mA to 7.0mA in High-Gain Mode
2.2mA in Low-Gain Mode
o 0.25µA Shutdown Current (MAX2652/53)
PART
MAX2651EUB
MAX2652EUB
MAX2653EUA
Ordering Information
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
10 µMAX
10 µMAX
8 µMAX
GSM900/DCS1800/PCS1900 Triple-Band Phones
DCS1800 or PCS1900 Single-Mode Phones
IS-136 TDMA Dual-Band Phones
Pin Configurations/Functional Diagrams
SHDN (GND) 1
GSMIN 2
GND 3
DCSIN 4
BAND 5
HIGH
LOW
LOW
HIGH
( ) ARE FOR MAX2651.
DC BIAS
CONTROL
MAX2651
MAX2652
10 GAIN
SHDN 1
9 GSMOUT
GND 2
8 V_CC
DCSIN 3
7 DCSOUT
6 GND
GND 4
LOW
HIGH
DC BIAS
CONTROL
MAX2653
8 GAIN
7 V_CC
6 DCSOUT
5 GND
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