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19-1506; Rev 1; 10/99
GSM900 and DCS1800/PCS1900
Dual-Band, Low-Noise Amplifiers
General Description
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.
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.
Features
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)
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)
MAX2651/MAX2652/MAX2653
Ordering Information
PART
MAX2651EUB
MAX2652EUB
MAX2653EUA
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
Applications
GSM900/DCS1800 Dual-Band Phones
GSM900/DCS1800/PCS1900 Triple-Band Phones
DCS1800 or PCS1900 Single-Mode Phones
IS-136 TDMA Dual-Band Phones
Pin Configurations/Functional Diagrams
SHDN (GND)
GSMIN
1
2
LOW
HIGH
DC BIAS
CONTROL
LOW
HIGH
10 GAIN
9
8
7
GSMOUT
V
CC
DCSOUT
SHDN 1
GND 2
DCSIN 3
GND 4
LOW
HIGH
DC BIAS
CONTROL
8
7
6
5
GAIN
V
CC
DCSOUT
GND
GND 3
DCSIN 4
BAND 5
MAX2651
MAX2652
6
GND
MAX2653
( ) ARE FOR MAX2651.
________________________________________________________________
Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
GSM900 and DCS1800/PCS1900
Dual-Band, Low-Noise Amplifiers
MAX2651/MAX2652/MAX2653
ABSOLUTE MAXIMUM RATINGS
V
CC
to GND ..............................................................-0.3V to +6V
SHDN,
GAIN, BAND to GND......................-0.3V to (V
CC
+ 0.3V)
GSMIN, DCSIN ..........................................1.0V peak (+10dBm)
Input Current (all digital inputs) .......................................±10mA
Continuous Power Dissipation
8-Pin µMAX (derate 4.5mW/°C above +70°C)..............362mW
10-Pin µMAX (derate 5.6mW/°C above +70°C) ............444mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+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—MAX2651
(V
CC
= +2.7V to +3.3V, BAND = GAIN = V
CC
, no input signal, all input/output ports terminated in 50Ω, T
A
= -40°C to +85°C, unless
otherwise noted. Typical values are at V
CC
= +3V, T
A
= +25°C.) (Note 1)
PARAMETER
Input Voltage Range
SYMBOL
V
CC
DCS band, high-gain mode
(BAND = GAIN = V
CC
)
DCS band, low-gain mode
(BAND = V
CC
, GAIN = GND)
GSM band, high-gain mode
(BAND = GND, GAIN = V
CC
)
GSM band, low-gain mode
(BAND = GND, GAIN = V
CC
)
Input Logic Threshold High
Input Logic Threshold Low
Input Logic High Current
Input Logic Low Current
V
IH
V
IL
I
IH
I
IL
V
IN
= V
CC
V
IN
= GND
-1.5
0.5
1.5
CONDITIONS
MIN
2.7
5.7
2.2
5.9
2.2
TYP
MAX
3.3
8.7
3.3
mA
9.6
3.6
1.5
V
V
µA
µA
UNITS
V
Input Supply Current
I
CC
DC ELECTRICAL CHARACTERISTICS—MAX2652
(V
CC
= +2.7V to +3.3V, BAND = GAIN = V
CC
, no input signal, all input/output ports terminated in 50Ω, T
A
= -40°C to +85°C, unless
otherwise noted. Typical values are at V
CC
= +3V, T
A
= +25°C.) (Note 1)
PARAMETER
Input Voltage Range
SYMBOL
V
CC
DCS band, high-gain mode
(BAND = GAIN = V
CC
)
DCS band, low-gain mode
(BAND = V
CC
, GAIN = GND)
GSM band, high-gain mode
(BAND = GND, GAIN = V
CC
)
GSM band, low-gain mode
(BAND = GND, GAIN = V
CC
)
Shutdown Supply Current
Input Logic Threshold High
Input Logic Threshold Low
Input Logic High Current
Input Logic Low Current
2
V
IH
V
IL
I
IH
I
IL
V
IN
= V
CC
V
IN
= GND
-1.5
0.5
1.5
SHDN
= GND
CONDITIONS
MIN
2.7
7.0
2.3
7.2
2.4
0.25
1.5
TYP
MAX
3.3
11.0
3.6
mA
11.0
3.7
µA
V
V
µA
µA
UNITS
V
Input Supply Current
I
CC
_______________________________________________________________________________________
GSM900 and DCS1800/PCS1900
Dual-Band, Low-Noise Amplifiers
DC ELECTRICAL CHARACTERISTICS—MAX2653
(V
CC
= +2.7V to +3.3V,
SHDN
= GAIN = V
CC
, no input signal, all input/output ports terminated in 50Ω, T
A
= -40°C to +85°C, unless
otherwise noted. Typical values are at V
CC
= +3V, T
A
= +25°C.) (Note 1)
PARAMETER
Input Voltage Range
Input Supply Current
Shutdown Supply Current
Input Logic Threshold High
Input Logic Threshold Low
Input Logic High Current
Input Logic Low Current
SYMBOL
V
CC
I
CC
I
SHDN
V
IH
V
IL
I
IH
I
IL
V
IN
= V
CC
V
IN
= GND
-1.5
0.5
3
DCS band, high-gain mode (GAIN = V
CC
)
DCS band, low-gain mode (GAIN = GND)
SHDN
= GND
CONDITIONS
MIN
2.7
5.4
2.2
0.25
1.5
TYP
MAX
3.3
8.5
3.2
UNITS
V
mA
µA
V
V
µA
µA
MAX2651/MAX2652/MAX2653
Note 1:
Devices are production tested at T
A
= +25°C. Minimum and maximum limits are guaranteed by design and characterization.
AC ELECTRICAL CHARACTERISTICS—MAX2651
(MAX2651 EV kit, f
IN
= 945MHz (GSM band), f
IN
= 1850MHz (DCS band), P
IN
= -30dBm, input and output matching networks are
optimized for the frequency band of interest, all input/output ports terminated in 50Ω, V
CC
= +3V, T
A
= +25°C, unless otherwise noted.)
(Note 2)
PARAMETER
Input Frequency Range
(Note 3)
SYMBOL
f
IN
CONDITIONS
DCS band (BAND = V
CC
)
GSM band (BAND = GND)
DCS band, high-gain
mode (BAND = GAIN =
V
CC
)
DCS band, low-gain
mode (BAND = V
CC
,
GAIN = GND)
Power Gain (Note 4)
G
GSM band, high-gain
mode (BAND = GND,
GAIN = V
CC
)
GSM band, low-gain
mode (BAND = GAIN =
GND)
DCS band, high-gain mode
(BAND = GAIN = V
CC
)
Noise Figure (Note 4)
NF
DCS band, low-gain mode
(BAND = V
CC
, GAIN = GND)
GSM band, high-gain mode
(BAND = GND, GAIN = V
CC
)
GSM band, low-gain mode
(BAND = GAIN = GND)
TA = +25°C
TA = -40°C to +85°C
TA = +25°C
TA = -40°C to +85°C
16.5
16
-3.5
-4
1.8
5.5
1.2
5.3
-2
18
19.5
20
-0.5
0
2.05
6.0
dB
1.4
6.7
TA = +25°C
TA = -40°C to +85°C
TA = +25°C
TA = -40°C to +85°C
MIN
1805
925
16.5
16
-3.5
-4
-2
TYP
MAX
1880
960
19.5
20
-0.5
0
dB
UNITS
MHz
18
_______________________________________________________________________________________
3
GSM900 and DCS1800/PCS1900
Dual-Band, Low-Noise Amplifiers
MAX2651/MAX2652/MAX2653
AC ELECTRICAL CHARACTERISTICS—MAX2651 (continued)
(MAX2651 EV kit, f
IN
= 945MHz (GSM band), f
IN
= 1850MHz (DCS band), P
IN
= -30dBm, input and output matching networks are
optimized for the frequency band of interest, all input/output ports terminated in 50Ω, V
CC
= +3V, T
A
= +25°C, unless otherwise noted.)
(Note 2)
PARAMETER
SYMBOL
CONDITIONS
DCS band, high-gain mode
(BAND = GAIN = V
CC
)
DCS band, low-gain mode
(BAND = V
CC
, GAIN = GND)
GSM band, high-gain mode
(BAND = GND, GAIN = V
CC
)
GSM band, low-gain mode
(BAND = GND, GAIN = GND)
MIN
-11.5
-1.5
-10.5
-2.5
-20
-9.5
-20
-10.5
TYP
-10
0.5
dBm
-8.5
0.5
-18
-8
dBm
-18
-8.5
-11
-14
-11
-20
-14
-12
-19
-20
-32
-20
-39
-22
-8.5
-12
dB
-8.5
-15
-10
-10
dB
-15
-15
-29
-18
dB
-35
-20
MAX
UNITS
(Note 5)
Input Third-Order Intercept Point
IIP3
(Note 6)
DCS band, high-gain mode
(BAND = GAIN = V
CC
)
DCS band, low-gain mode
(BAND = V
CC
, GAIN = GND)
GSM band, high-gain mode
(BAND = GND, GAIN = V
CC
)
GSM band, low-gain mode
(BAND = GND, GAIN = GND)
DCS band, high-gain mode
(BAND = GAIN = V
CC
)
DCS band, low-gain mode
(BAND = V
CC
, GAIN = GND)
GSM band, high-gain mode
(BAND = GND, GAIN = V
CC
)
GSM band, low-gain mode
(BAND = GAIN = GND)
DCS band, high-gain mode
(BAND = GAIN = V
CC
)
DCS band, low-gain mode
(BAND = V
CC
, GAIN = GND)
GSM band, high-gain mode
(BAND = GND, GAIN = V
CC
)
GSM band, low-gain mode
(BAND = GAIN = GND)
DCS band, high-gain mode
(BAND = GAIN = V
CC
)
DCS band, low-gain mode
(BAND = V
CC
, GAIN = GND)
GSM band, high-gain mode
(BAND = GND, GAIN = V
CC
)
GSM band, low-gain mode
(BAND = GAIN = GND)
Input 1dB Compression Point
IP
-1dB
Input Return Loss
S
11
2
Output Return Loss
S
22
2
Reverse Isolation
S
12
2
4
_______________________________________________________________________________________
GSM900 and DCS1800/PCS1900
Dual-Band, Low-Noise Amplifiers
AC ELECTRICAL CHARACTERISTICS—MAX2652
(MAX2652 EV kit, f
IN
= 945MHz (GSM band), f
IN
= 1850MHz (DCS band), P
IN
= -30dBm, input and output matching networks are
optimized for the frequency band of interest, all input/output ports terminated in 50Ω, V
CC
= +3V, T
A
= +25°C, unless otherwise noted.)
(Note 2)
PARAMETER
Input Frequency Range
(Note 3)
SYMBOL
f
IN
CONDITIONS
DCS band (BAND = V
CC
)
GSM band (BAND = GND)
DCS band, high-gain
mode (BAND = GAIN =
V
CC
)
DCS band, low-gain
mode (BAND = V
CC
,
GAIN = GND)
Power Gain (Note 4)
G
GSM band, high-gain
mode (BAND = GND,
GAIN = V
CC
)
GSM band, low-gain
mode (BAND = GAIN =
GND)
DCS band, high-gain mode
(BAND = GAIN = V
CC
)
Noise Figure (Note 4)
NF
DCS band, low-gain mode
(BAND = V
CC
, GAIN = GND)
GSM band, high-gain mode
(BAND = GND, GAIN = V
CC
)
GSM band, low-gain mode
(BAND = GAIN = GND)
DCS band, high-gain mode
(BAND = GAIN = V
CC
)
DCS band, low-gain mode
(BAND = V
CC
, GAIN = GND)
GSM band, high-gain mode
(BAND = GND, GAIN = V
CC
)
GSM band, low-gain mode
(BAND = GND, GAIN = GND)
-8.5
0
-9
0.5
-18
-10.5
-18
-10
TA = +25°C
TA = -40°C to +85°C
TA = +25°C
TA = -40°C to +85°C
16.5
16
-4.0
-4.5
1.8
5.8
1.3
5.5
-7
1.5
dBm
-7.5
2.5
-16.5
-8
dBm
-16.5
-8.5
-2
18
19.5
20
-0.5
0
2.0
6.3
dB
1.5
6.7
TA = +25°C
TA = -40°C to +85°C
TA = +25°C
TA = -40°C to +85°C
MIN
1805
925
16
15.5
-3.5
-4
-2
TYP
MAX
1880
960
19
19.5
-0.5
0
dB
UNITS
MHz
MAX2651/MAX2652/MAX2653
17.5
(Note 5)
Input Third-Order
Intercept Point
IIP3
(Note 6)
DCS band, high-gain mode
(BAND = GAIN = V
CC
)
Input 1dB Compression
Point
DCS band, low-gain mode
(BAND = V
CC
, GAIN = GND)
GSM band, high-gain mode
(BAND = GND, GAIN = V
CC
)
GSM band, low-gain mode
(BAND = GND, GAIN = GND)
IP
-1dB
_______________________________________________________________________________________
5

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