MAXIM MAX2652EUB

19-1506; Rev 1; 10/99
GSM900 and DCS1800/PCS1900
Dual-Band, Low-Noise Amplifiers
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) performance 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
Features
♦ Wide Operating Frequency Range
800MHz to 1000MHz (MAX2651/52)
1800MHz to 2000MHz (MAX2651/52/53)
♦ 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)
♦ High Gain
18dB over GSM Receive Band (MAX2651/52)
18dB/17.5dB/18.5dB over DCS Receive Band
(MAX2651/52/53)
♦ 20dB Gain Reduction in Low-Gain Mode
♦ Externally Adjustable Gain
♦ +2.7V to +3.3V Single-Supply Operation
♦ Low Supply Current
5.4mA to 7.0mA in High-Gain Mode
2.2mA in Low-Gain Mode
♦ 0.25µA Shutdown Current (MAX2652/53)
Ordering Information
PART
TEMP. RANGE
PIN-PACKAGE
MAX2651EUB
-40°C to +85°C
10 µMAX
MAX2652EUB
-40°C to +85°C
10 µMAX
MAX2653EUA
-40°C to +85°C
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
LOW
DC BIAS
CONTROL
GND 3
DCSIN 4
10 GAIN
HIGH
LOW
9
GSMOUT
8
VCC
7
DCSOUT
SHDN 1
GND 2
DCSIN 3
GND 4
BAND 5
HIGH
MAX2651
MAX2652
6
GND
DC BIAS
CONTROL
LOW
HIGH
8
GAIN
7
VCC
6
DCSOUT
5
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.
MAX2651/MAX2652/MAX2653
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 optimized 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 functionally equivalent to the MAX2651, but features a lowpower 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).
MAX2651/MAX2652/MAX2653
GSM900 and DCS1800/PCS1900
Dual-Band, Low-Noise Amplifiers
ABSOLUTE MAXIMUM RATINGS
VCC to GND ..............................................................-0.3V to +6V
SHDN, GAIN, BAND to GND......................-0.3V to (VCC + 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
(VCC = +2.7V to +3.3V, BAND = GAIN = VCC, no input signal, all input/output ports terminated in 50Ω, TA = -40°C to +85°C, unless
otherwise noted. Typical values are at VCC = +3V, TA = +25°C.) (Note 1)
PARAMETER
Input Voltage Range
Input Supply Current
SYMBOL
CONDITIONS
ICC
MIN
TYP
2.7
VCC
MAX
UNITS
3.3
V
DCS band, high-gain mode
(BAND = GAIN = VCC)
5.7
8.7
DCS band, low-gain mode
(BAND = VCC, GAIN = GND)
2.2
3.3
GSM band, high-gain mode
(BAND = GND, GAIN = VCC)
5.9
9.6
GSM band, low-gain mode
(BAND = GND, GAIN = VCC)
2.2
3.6
Input Logic Threshold High
VIH
Input Logic Threshold Low
VIL
Input Logic High Current
IIH
VIN = VCC
Input Logic Low Current
IIL
VIN = GND
mA
1.5
0.5
V
V
1.5
-1.5
µA
µA
DC ELECTRICAL CHARACTERISTICS—MAX2652
(VCC = +2.7V to +3.3V, BAND = GAIN = VCC, no input signal, all input/output ports terminated in 50Ω, TA = -40°C to +85°C, unless
otherwise noted. Typical values are at VCC = +3V, TA = +25°C.) (Note 1)
PARAMETER
Input Voltage Range
Input Supply Current
SYMBOL
CONDITIONS
Shutdown Supply Current
MAX
UNITS
3.3
V
DCS band, high-gain mode
(BAND = GAIN = VCC)
7.0
11.0
DCS band, low-gain mode
(BAND = VCC, GAIN = GND)
2.3
3.6
GSM band, high-gain mode
(BAND = GND, GAIN = VCC)
7.2
11.0
GSM band, low-gain mode
(BAND = GND, GAIN = VCC)
2.4
3.7
SHDN = GND
0.25
Input Logic Threshold High
VIH
Input Logic Threshold Low
VIL
Input Logic High Current
IIH
VIN = VCC
Input Logic Low Current
IIL
VIN = GND
2
TYP
2.7
VCC
ICC
MIN
mA
µA
1.5
V
1.5
µA
0.5
-1.5
_______________________________________________________________________________________
V
µA
GSM900 and DCS1800/PCS1900
Dual-Band, Low-Noise Amplifiers
(VCC = +2.7V to +3.3V, SHDN = GAIN = VCC, no input signal, all input/output ports terminated in 50Ω, TA = -40°C to +85°C, unless
otherwise noted. Typical values are at VCC = +3V, TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
Input Voltage Range
CONDITIONS
TYP
MAX
UNITS
3.3
V
DCS band, high-gain mode (GAIN = VCC)
5.4
8.5
DCS band, low-gain mode (GAIN = GND)
2.2
3.2
SHDN = GND
0.25
2.7
VCC
Input Supply Current
ICC
Shutdown Supply Current
ISHDN
MIN
Input Logic Threshold High
VIH
Input Logic Threshold Low
VIL
Input Logic High Current
IIH
VIN = VCC
Input Logic Low Current
IIL
VIN = GND
mA
µA
1.5
V
3
µA
0.5
V
-1.5
µA
Note 1: Devices are production tested at TA = +25°C. Minimum and maximum limits are guaranteed by design and characterization.
AC ELECTRICAL CHARACTERISTICS—MAX2651
(MAX2651 EV kit, fIN = 945MHz (GSM band), fIN = 1850MHz (DCS band), PIN = -30dBm, input and output matching networks are
optimized for the frequency band of interest, all input/output ports terminated in 50Ω, VCC = +3V, TA = +25°C, unless otherwise noted.)
(Note 2)
PARAMETER
Input Frequency Range
(Note 3)
Power Gain (Note 4)
Noise Figure (Note 4)
SYMBOL
fIN
CONDITIONS
DCS band (BAND = VCC)
GSM band (BAND = GND)
MIN
1805
925
TYP
DCS band, high-gain
mode (BAND = GAIN =
VCC)
TA = +25°C
16.5
18
DCS band, low-gain
mode (BAND = VCC,
GAIN = GND)
TA = +25°C
GSM band, high-gain
mode (BAND = GND,
GAIN = VCC)
TA = +25°C
GSM band, low-gain
mode (BAND = GAIN =
GND)
TA = +25°C
TA = -40°C to +85°C
TA = -40°C to +85°C
16
-3.5
MAX
1880
960
MHz
19.5
20
-2
-4
-0.5
0
G
NF
UNITS
dB
TA = -40°C to +85°C
TA = -40°C to +85°C
16.5
18
16
-3.5
19.5
20
-2
-4
-0.5
0
DCS band, high-gain mode
(BAND = GAIN = VCC)
1.8
2.05
DCS band, low-gain mode
(BAND = VCC, GAIN = GND)
5.5
6.0
GSM band, high-gain mode
(BAND = GND, GAIN = VCC)
1.2
1.4
GSM band, low-gain mode
(BAND = GAIN = GND)
5.3
6.7
dB
_______________________________________________________________________________________
3
MAX2651/MAX2652/MAX2653
DC ELECTRICAL CHARACTERISTICS—MAX2653
MAX2651/MAX2652/MAX2653
GSM900 and DCS1800/PCS1900
Dual-Band, Low-Noise Amplifiers
AC ELECTRICAL CHARACTERISTICS—MAX2651 (continued)
(MAX2651 EV kit, fIN = 945MHz (GSM band), fIN = 1850MHz (DCS band), PIN = -30dBm, input and output matching networks are
optimized for the frequency band of interest, all input/output ports terminated in 50Ω, VCC = +3V, TA = +25°C, unless otherwise noted.)
(Note 2)
PARAMETER
SYMBOL
MIN
TYP
DCS band, high-gain mode
(BAND = GAIN = VCC)
CONDITIONS
-11.5
-10
DCS band, low-gain mode
(BAND = VCC, GAIN = GND)
-1.5
0.5
GSM band, high-gain mode
(BAND = GND, GAIN = VCC)
-10.5
-8.5
GSM band, low-gain mode
(BAND = GND, GAIN = GND)
-2.5
0.5
DCS band, high-gain mode
(BAND = GAIN = VCC)
-20
-18
DCS band, low-gain mode
(BAND = VCC, GAIN = GND)
-9.5
-8
GSM band, high-gain mode
(BAND = GND, GAIN = VCC)
-20
-18
GSM band, low-gain mode
(BAND = GND, GAIN = GND)
-10.5
-8.5
(Note 5)
Input Third-Order Intercept Point
IIP3
(Note 6)
Input 1dB Compression Point
Input Return Loss
Output Return Loss
Reverse Isolation
4
IP-1dB
S11
S22
S12
2
2
2
MAX
UNITS
dBm
dBm
DCS band, high-gain mode
(BAND = GAIN = VCC)
-11
-8.5
DCS band, low-gain mode
(BAND = VCC, GAIN = GND)
-14
-12
GSM band, high-gain mode
(BAND = GND, GAIN = VCC)
-11
-8.5
GSM band, low-gain mode
(BAND = GAIN = GND)
-20
-15
DCS band, high-gain mode
(BAND = GAIN = VCC)
-14
-10
DCS band, low-gain mode
(BAND = VCC, GAIN = GND)
-12
-10
GSM band, high-gain mode
(BAND = GND, GAIN = VCC)
-19
-15
GSM band, low-gain mode
(BAND = GAIN = GND)
-20
-15
DCS band, high-gain mode
(BAND = GAIN = VCC)
-32
-29
DCS band, low-gain mode
(BAND = VCC, GAIN = GND)
-20
-18
GSM band, high-gain mode
(BAND = GND, GAIN = VCC)
-39
-35
GSM band, low-gain mode
(BAND = GAIN = GND)
-22
-20
dB
dB
dB
_______________________________________________________________________________________
GSM900 and DCS1800/PCS1900
Dual-Band, Low-Noise Amplifiers
(MAX2652 EV kit, fIN = 945MHz (GSM band), fIN = 1850MHz (DCS band), PIN = -30dBm, input and output matching networks are
optimized for the frequency band of interest, all input/output ports terminated in 50Ω, VCC = +3V, TA = +25°C, unless otherwise noted.)
(Note 2)
PARAMETER
SYMBOL
Input Frequency Range
(Note 3)
fIN
Power Gain (Note 4)
Noise Figure (Note 4)
CONDITIONS
DCS band (BAND = VCC)
GSM band (BAND = GND)
16
17.5
TA = +25°C
TA = -40°C to +85°C
15.5
DCS band, low-gain
mode (BAND = VCC,
GAIN = GND)
TA = +25°C
-3.5
GSM band, high-gain
mode (BAND = GND,
GAIN = VCC)
TA = +25°C
GSM band, low-gain
mode (BAND = GAIN =
GND)
TA = +25°C
-4.0
TA = -40°C to +85°C
-4.5
TA = -40°C to +85°C
MAX
1880
960
NF
MHz
19.5
-2
-4
-0.5
0
dB
TA = -40°C to +85°C
16.5
18
16
19.5
20
-2
-0.5
0
DCS band, high-gain mode
(BAND = GAIN = VCC)
1.8
2.0
DCS band, low-gain mode
(BAND = VCC, GAIN = GND)
5.8
6.3
1.3
1.5
5.5
6.7
dB
GSM band, high-gain mode
(BAND = GND, GAIN = VCC)
GSM band, low-gain mode
(BAND = GAIN = GND)
DCS band, high-gain mode
(BAND = GAIN = VCC)
-8.5
-7
DCS band, low-gain mode
(BAND = VCC, GAIN = GND)
0
1.5
GSM band, high-gain mode
(BAND = GND, GAIN = VCC)
-9
-7.5
GSM band, low-gain mode
(BAND = GND, GAIN = GND)
0.5
2.5
-18
-16.5
DCS band, low-gain mode
(BAND = VCC, GAIN = GND)
-10.5
-8
GSM band, high-gain mode
(BAND = GND, GAIN = VCC)
-18
-16.5
GSM band, low-gain mode
(BAND = GND, GAIN = GND)
-10
-8.5
(Note 6)
DCS band, high-gain mode
(BAND = GAIN = VCC)
IP-1dB
UNITS
19
G
IIP3
Input 1dB Compression
Point
TYP
DCS band, high-gain
mode (BAND = GAIN =
VCC)
(Note 5)
Input Third-Order
Intercept Point
MIN
1805
925
dBm
dBm
_______________________________________________________________________________________
5
MAX2651/MAX2652/MAX2653
AC ELECTRICAL CHARACTERISTICS—MAX2652
MAX2651/MAX2652/MAX2653
GSM900 and DCS1800/PCS1900
Dual-Band, Low-Noise Amplifiers
AC ELECTRICAL CHARACTERISTICS—MAX2652 (continued)
(MAX2652 EV kit, fIN = 945MHz (GSM band), fIN = 1850MHz (DCS band), PIN = -30dBm, input and output matching networks are
optimized for the frequency band of interest, all input/output ports terminated in 50Ω, VCC = +3V, TA = +25°C, unless otherwise noted.)
(Note 2)
PARAMETER
Input Return Loss
Output Return Loss
Reverse Isolation
6
SYMBOL
S11
S22
S12
2
2
2
CONDITIONS
MIN
TYP
MAX
DCS band, high-gain mode
(BAND = GAIN = VCC)
-12
-9.5
DCS band, low-gain mode
(BAND = VCC, GAIN = GND)
-12
-9.5
GSM band, high-gain mode
(BAND = GND, GAIN = VCC)
-11
-9.5
GSM band, low-gain mode
(BAND = GAIN = GND)
-20
-15
DCS band, high-gain mode
(BAND = GAIN = VCC)
-11
-9.5
DCS band, low-gain mode
(BAND = VCC, GAIN = GND)
-17
-13
GSM band, high-gain mode
(BAND = GND, GAIN = VCC)
-12.5
-11
GSM band, low-gain mode
(BAND = GAIN = GND)
-15
-13
DCS band, high-gain mode
(BAND = GAIN = VCC)
-29
-26
DCS band, low-gain mode
(BAND = VCC, GAIN = GND)
-19
-17
GSM band, high-gain mode
(BAND = GND, GAIN = VCC)
-37
-34
GSM band, low-gain mode
(BAND = GAIN = GND)
-23
-20
UNIT
dB
dB
dB
_______________________________________________________________________________________
GSM900 and DCS1800/PCS1900
Dual-Band, Low-Noise Amplifiers
(MAX2653 EV kit, fIN = 1850MHz (DCS band), fIN = 1960MHz (PCS band), PIN = -30dBm, input and output matching networks are
optimized for the frequency band of interest, all input/output ports terminated in 50Ω, VCC = +3V, TA = +25°C, unless otherwise
noted.) (Note 2)
PARAMETER
Input Frequency Range
(Note 3)
Power Gain (Note 4)
Noise Figure (Note 4)
SYMBOL
CONDITIONS
BAND = VCC
fIN
MIN
1805
1880
PCS band
1930
1990
DCS and PCS band,
high-gain mode
(BAND = GAIN = VCC)
TA = +25°C
17
TA = -40°C to +85°C
16
DCS and PCS band,
low-gain mode (BAND =
VCC, GAIN = GND)
TA = +25°C
-4
TA = -40°C to +85°C
-4
High-gain mode
(BAND = GAIN = VCC)
DCS band
1.7
1.9
PCS band
1.8
2.05
5.3
6.7
Input Return Loss
Output Return Loss
Reverse Isolation
18.5
IP-1dB
S22
S12
MHz
20
dB
NF
S11
UNITS
20
G
IIP3
Input 1dB Compression
Point
MAX
DCS band
DCS and PCS band, low-gain mode
(BAND = VCC, GAIN = GND)
Input Third-Order
Intercept Point
(Notes 5, 7)
TYP
2
2
2
-2.5
-1
0
DCS and PCS band, high-gain mode
(BAND = VCC, GAIN = GND)
-10.5
DCS and PCS band, low-gain mode
(BAND = VCC, GAIN = GND)
-1
+1.5
DCS and PCS band, high-gain mode
(BAND = GAIN = VCC)
-20
-18
DCS and PCS band, low-gain mode
(BAND = VCC, GAIN = GND)
-9
dB
-8.5
dBm
dB
-7
DCS and PCS band, high-gain mode
(BAND = GAIN = VCC)
-11
-8.5
DCS and PCS band, low-gain mode
(BAND = VCC, GAIN = GND)
-11
-9.5
DCS and PCS band, high-gain mode
(BAND = GAIN = VCC)
-12
-9.5
DCS and PCS band, low-gain mode
(BAND = VCC, GAIN = GND)
-15
-12
dB
dB
High-gain mode (BAND
= GAIN = VCC)
DCS band
-35
-31
PCS band
-33
-29
Low-gain mode (BAND =
VCC, GAIN = GND)
DCS band
-21
-18
PCS band
-21
-18
dB
Note 2: Minimum and maximum limits are guaranteed by design and characterization, but not production tested.
Note 3: The part has been fully characterized at the specified frequency range. Operation outside of this range is possible but not
guaranteed.
Note 4: Specification excludes circuit board losses.
Note 5: Measured with two tones, fIN1 = 1850MHz, fIN2 = 1850.8MHz, PIN = -33dBm for each tone.
Note 6: Measured with two tones, fIN1 = 945MHz, fIN2 = 945.8MHz, PIN = -33dBm for each tone.
Note 7: Measured with two tones, fIN1 = 1960MHz, fIN2 = 1960.8MHz, PIN = -33dBm for each tone.
_______________________________________________________________________________________
7
MAX2651/MAX2652/MAX2653
AC ELECTRICAL CHARACTERISTICS—MAX2653
Typical Operating Characteristics
(MAX2651 EV kit, VCC = +3.0V, input and output matched with recommended matching networks, TA = +25°C, unless otherwise noted.)
MAX2651 (GSM Band)
20
18
HIGH GAIN
-3
LOW GAIN
0
MA\X2651-03
-1
MA\X2651-02
MA\X2651-01
20
INPUT RETURN LOSS
vs. FREQUENCY
POWER GAIN vs. FREQUENCY
POWER GAIN vs. INPUT POWER
-5
-5
HIGH GAIN
-7
14
GAIN (dB)
16
S112 (dB)
10
LOW GAIN (dB)
POWER GAIN (dB)
0
LOW GAIN
HIGH GAIN
-10
-15
-10
LOW GAIN
-20
-9
12
-20
fIN = 945MHz
-11
10
-20
-15
-10
-5
-25
800
0
840
880
920
960
800
840
880
FREQUENCY (MHz)
PIN (dBm)
920
FREQUENCY (MHz)
OUTPUT RETURN LOSS
vs. FREQUENCY
REVERSE ISOLATION vs. FREQUENCY
0
MA\X2651-04
0
-5
-10
-10
S122 (dB)
S222 (dB)
1000
MA\X2651-05
-25
HIGH GAIN
-15
-20
LOW GAIN
-30
LOW GAIN
-20
HIGH GAIN
-40
-25
800
840
880
920
960
800
1000
840
SUPPLY CURRENT vs. VCC HIGH GAIN
960
1000
SUPPLY CURRENT vs. VCC LOW GAIN
7
MAX2651-07
NO INPUT SIGNAL
TA = +85°C
ICC (mA)
2.5
TA = +25°C
6
TA = -40°C
5
920
3.0
MAX2651-06
8
TA = +85°C
880
FREQUENCY (MHz)
FREQUENCY (MHz)
ICC (mA)
MAX2651/MAX2652/MAX2653
GSM900 and DCS1800/PCS1900
Dual-Band, Low-Noise Amplifiers
2.0
TA = +25°C
TA = -40°C
1.5
NO INPUT SIGNAL
4
1.0
2.7
2.8
2.9
3.0
VCC (V)
8
3.1
3.2
3.3
2.7
2.8
2.9
3.0
3.1
3.2
VCC (V)
_______________________________________________________________________________________
3.3
960
1000
GSM900 and DCS1800/PCS1900
Dual-Band, Low-Noise Amplifiers
MAX2651 (DCS Band)
0
20
LOW GAIN
-2
HIGH GAIN
-6
13
HIGH GAIN
S112 (dB)
-4
HIGH GAIN
S212 (dB)
15
LOW GAIN (dB)
10
-10
0
LOW GAIN
-10
LOW GAIN
-20
-8
11
-20
f = 1840MHz
-10
-5
1800
0
1840
1880
1920
1960
1800
2000
1840
1880
1920
1960
2000
FREQUENCY (MHz)
FREQUENCY (MHz)
PIN (dBm)
OUTPUT RETURN LOSS
vs. FREQUENCY
REVERSE ISOLATION vs. FREQUENCY
0
0
MA\X2651-12
-15
MA\X2651-11
-10
S122 (dB)
-10
HIGH GAIN
LOW GAIN
-20
-30
LOW GAIN
-20
HIGH GAIN
-40
1840
1880
1920
1960
1800
2000
1840
1880
1920
1960
2000
FREQUENCY (MHz)
FREQUENCY (MHz)
SUPPLY CURRENT vs. VCC LOW GAIN
SUPPLY CURRENT vs. VCC HIGH GAIN
8
NO INPUT SIGNAL
TA = +85°C
3.0
MAX2651-14
1800
TA = +85°C
2.5
7
ICC (mA)
-20
MAX2651-13
-25
-10
S222 (dB)
9
ICC (mA)
POWER GAIN (dB)
17
0
MA\X2651-09
MA\X2651-08
MA\X2651-10
POWER GAIN vs. INPUT POWER
19
INPUT RETURN LOSS
vs. FREQUENCY
POWER GAIN vs. FREQUENCY
6
TA = +25°C
5
TA = +25°C
2.0
1.5
TA = -40°C
TA = -40°C
NO INPUT SIGNAL
1.0
4
2.7
2.8
2.9
3.0
VCC (V)
3.1
3.2
3.3
2.7
2.8
2.9
3.0
3.1
3.2
3.3
VCC (V)
_______________________________________________________________________________________
9
MAX2651/MAX2652/MAX2653
Typical Operating Characteristics (continued)
(MAX2651 EV kit, VCC = +3.0V, input and output matched with recommended matching networks, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
(MAX2652 EV kit, VCC = +3.0V, input and output matched with recommended matching networks, TA = +25°C, unless otherwise noted.)
MAX2652 (GSM Band)
20
-4
18
0
MA\X2652-tocA
-2
LOW GAIN
-10
HIGH GAIN
-8
12
-10
0
LOW GAIN
-15
-10
-5
-50
800
0
840
880
920
960
1000
800
840
880
920
960
1000
PIN (dBm)
FREQUENCY (MHz)
FREQUENCY (MHz)
OUTPUT RETURN LOSS
vs. FREQUENCY
REVERSE ISOLATION vs. FREQUENCY
HIGH-GAIN MODE
SUPPLY CURRENT vs. SUPPLY VOLTAGE
LOW GAIN
LOW GAIN
-30
-50
-50
7.5
7.0
TA = +25°C
6.5
HIGH GAIN
-40
TA = +85°C
8.0
-20
-40
MAX2652-toc02
8.5
ICC (mA)
-20
9.0
MA\X2652-tocD
-10
S122 (dB)
HIGH GAIN
-30
0
MA\X2652-tocC
0
-10
-30
-40
-14
8
-20
LOW GAIN
-20
f = 945MHz
-25
-20
-10
-12
10
S222 (dB)
S112 (dB)
14
HIGH GAIN
10
GAIN (dB)
16
-6
LOW GAIN (dB)
HIGH GAIN (dB)
HIGH GAIN
MA\X2652-tocB
MA\X2652-01
20
INPUT RETURN LOSS
vs. FREQUENCY
POWER GAIN vs. FREQUENCY
POWER GAIN vs. INPUT POWER
6.0
5.5
920
960
1000
800
840
FREQUENCY (MHz)
880
920
960
LOW-GAIN MODE
SUPPLY CURRENT vs. SUPPLY VOLTAGE
2.5
TA = +25°C
2.0
TA = -40°C
TA = +25°C
-3
-5
TA = +85°C
HIGH GAIN
TA = +25°C
1.0
3.1
3.2
3.3
3.1
3.2
3.3
-6
LOW GAIN
-8
TA = -40°C
-10
TA = +25°C
-12
-14
TA = +85°C
HIGH GAIN
TA = +85°C
TA = +25°C
-18
TA = -40°C
TA = -40°C
-11
3.0
3.0
-16
-9
NO INPUT SIGNAL
10
TA = -40°C
-1
-7
1.5
2.9
2.9
INPUT P1dB vs. SUPPLY VOLTAGE
TA = +85°C
LOW GAIN
INPUT IP3 (dBm)
TA = +85°C
SUPPLY VOLTAGE (V)
2.8
SUPPLY VOLTAGE (V)
3
1
2.8
2.7
INPUT IP3 vs. SUPPLY VOLTAGE
5
MAX2652 toc03
3.0
2.7
1000
FREQUENCY (MHz)
3.5
NO INPUT SIGNAL
TA = -40°C
5.0
MAX2652 toc03b
880
INPUT P1dB (dBm)
840
MAX2652 toc03a
800
ICC (mA)
MAX2651/MAX2652/MAX2653
GSM900 and DCS1800/PCS1900
Dual-Band, Low-Noise Amplifiers
2.7
2.8
2.9
3.0
3.1
SUPPLY VOLTAGE (V)
3.2
-20
3.3
2.7
2.8
2.9
3.0
3.1
SUPPLY VOLTAGE (V)
______________________________________________________________________________________
3.2
3.3
GSM900 and DCS1800/PCS1900
Dual-Band, Low-Noise Amplifiers
MAX2652 (DCS Band)
POWER GAIN vs. FREQUENCY
MA\X2652-toc04
20
-2
HIGH GAIN
HIGH GAIN
12
-8
S112 (dB)
14
-6
HIGH GAIN
-10
10
GAIN (dB)
-4
LOW GAIN (dB)
16
0
MA\X2652 toc05
LOW GAIN
18
0
LOW GAIN
-20
f = 945MHz
-12
-15
-10
-5
-50
1800
0
1840
1880
1920
1960
2000
1800
1920
1960
FREQUENCY (MHz)
OUTPUT RETURN LOSS vs. FREQUENCY
REVERSE ISOLATION vs. FREQUENCY
HIGH-GAIN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
0
MA\X2652 toc07
HIGH GAIN
-10
-10
NO INPUT SIGNAL
8.5
LOW GAIN
-30
-40
TA = +85°C
8.0
-20
ICC (mA)
S122 (dB)
-20
-30
7.5
7.0
TA = +25°C
6.5
6.0
HIGH GAIN
-40
5.5
-50
1920
1960
2000
1800
1840
FREQUENCY (MHz)
LOW-GAIN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
1920
1960
TA = +25°C
2.0
TA = -40°C
1.5
NO INPUT SIGNAL
TA = +85°C
0
TA = +25°C
-2
TA = -40°C
-4
2.9
3.0
3.1
3.2
3.3
LOW GAIN
HIGH GAIN
-8
TA = +25°C
-16
TA = -40°C
3.0
3.2
3.3
3.1
3.2
3.3
LOW GAIN
-8
-14
2.9
3.1
TA = +85°C
-6
TA = +85°C
2.8
3.0
-4
-6
2.7
2.9
INPUT P1dB vs. SUPPLY VOLTAGE
2
-10
1.0
2.8
2.8
SUPPLY VOLTAGE (V)
INPUT IP3 vs. SUPPLY VOLTAGE
INPUT IP3 (dBm)
TA = +85°C
2.7
2.7
2000
4
MAX2652 toc10
3.0
2.5
1880
FREQUENCY (MHz)
INPUT 1dB (dBm)
1880
MAX2652 toc10a
1840
TA = -40°C
5.0
-50
1800
2000
9.0
LOW GAIN
S222 (dB)
1880
FREQUENCY (MHz)
0
ICC (mA)
1840
PIN (dBm)
MAX2652-toc09
-20
MAX2652 toc10b
8
-25
-30
-40
-10
10
LOW GAIN
-20
-10
MA\X2652 toc08
HIGH GAIN (dB)
INPUT RETURN LOSS vs. FREQUENCY
0
MA\X2652 toc06
POWER GAIN vs. INPUT POWER
20
TA = -40°C
TA = +25°C
TA = +85°C
HIGH GAIN
TA = +25°C
TA = -40°C
-18
3.2
3.3
______________________________________________________________________________________
11
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
2.7
2.8
2.9
3.0
3.1
SUPPLY VOLTAGE (V)
MAX2651/MAX2652/MAX2653
Typical Operating Characteristics (continued)
(MAX2652 EV kit, VCC = +3.0V, input and output matched with recommended matching networks, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
(MAX2653 EV kit, VCC = +3.0V, input and output matched with recommended matching networks, TA = +25°C, unless otherwise noted.)
MAX2653 (DCS Band)
POWER GAIN vs. INPUT POWER
INPUT RETURN LOSS
vs. FREQUENCY
POWER GAIN vs. FREQUENCY
MA\X2651-15
20
-5
10
HIGH GAIN
0
-8
LOW GAIN
LOW GAIN
-9
12
-4
S112 (dB)
-7
GAIN (dB)
HIGH GAIN
LOW GAIN (dB)
LOW GAIN
16
14
0
MA\X2653-17
-3
MA\X2653-16
18
POWER GAIN (dB)
-10
-12
HIGH GAIN
10
-11
f = 1840MHz
-20
-16
-20
-15
-10
-5
0
1800
1840
PIN (dBm)
1880
1920
1960
1840
1880
1920
FREQUENCY (MHz)
FREQUENCY (MHz)
OUTPUT RETURN LOSS
vs. FREQUENCY
REVERSE ISOLATION vs. FREQUENCY
0
MA\X2653-18
0
HIGH GAIN
-10
S122 (dB)
-10
S222 (dB)
1800
2000
MA\X2653-19
-25
LOW GAIN
-20
LOW GAIN
-20
-30
-30
HIGH GAIN
-40
-40
1840
1880
1920
1960
1800
2000
1840
1880
1920
1960
2000
FREQUENCY (MHz)
FREQUENCY (MHz)
SUPPLY CURRENT vs. VCC HIGH GAIN
NO INPUT SIGNAL
TA = +85°C
SUPPLY CURRENT vs. VCC LOW GAIN
3.0
MAX2651-20
8
MAX2651-21
1800
TA = +85°C
7
2.5
ICC (mA)
ICC (mA)
MAX2651/MAX2652/MAX2653
GSM900 and DCS1800/PCS1900
Dual-Band, Low-Noise Amplifiers
6
TA = +25°C
5
TA = -40°C
2.0
TA = +25°C
1.5
TA = -40°C
NO INPUT SIGNAL
4
1.0
2.7
2.8
2.9
3.0
VCC (V)
12
3.1
3.2
3.3
2.7
2.8
2.9
3.0
3.1
VCC (V)
______________________________________________________________________________________
3.2
3.3
1960
2000
GSM900 and DCS1800/PCS1900
Dual-Band, Low-Noise Amplifiers
PIN MAX2652
NAME
FUNCTION
1
SHDN
Shutdown Logic Input. Drive low to enter shutdown; drive high or connect to VCC for normal operation.
3, 6
2, 4, 5
GND
RF Ground. Connect to the ground plane as close to the IC as possible
to minimize trace inductance.
2
2
—
GSMIN
RF Input for GSM Band
4
4
3
DCSIN
RF Input for DCS and PCS bands
5
5
—
BAND
Band-Select Logic Input. Drive BAND high to enable DCS/PCS LNA;
drive low to enable GSM LNA.
7
7
6
DCSOUT
8
8
7
VCC
9
9
—
GSMOUT
10
10
8
GAIN
MAX2651
MAX2652
MAX2653
—
1
1, 3, 6
RF Output for DCS and PCS Bands
Supply Voltage Input, +2.7V < VCC < +3.3V
RF Output for GSM Band
Gain-Select Logic Input. Drive GAIN high for high-gain operation; drive
GAIN low for low-gain operation.
LOGIC-LEVEL
GAIN CONTROL
VCC
910Ω
1
GND
GAIN
10
180Ω
8.2nH
GSM INPUT
(925MHz TO 960MHz)
2
3
47pF
3.9nH
DCS INPUT
(1805MHz TO 1880MHz)
GSMIN
GND
8.2nH
220pF
MAX2651
68pF
15pF
100pF
GSMOUT
VCC
C9
2.2pF
9
GSM
OUTPUT
VCC
8
10µF
4
DCSIN
DCSOUT
BAND
GND
1.2pF
DCS
OUTPUT
7
1.5pF
5
6
330Ω
2.2nH
220pF
220pF
910Ω
VCC
LOGIC-LEVEL
BAND CONTROL
Figure 1. MAX2651 Typical Application Circuit
______________________________________________________________________________________
13
MAX2651/MAX2652/MAX2653
Pin Description
MAX2651/MAX2652/MAX2653
GSM900 and DCS1800/PCS1900
Dual-Band, Low-Noise Amplifiers
LOGIC-LEVEL
GAIN CONTROL
LOGIC-LEVEL
SHUTDOWN CONTROL
910Ω
910Ω
1
GSM INPUT
(925MHz TO 960MHz)
SHDN
240Ω
220pF
2
3
47pF
C9
2.2pF
GSMIN
9
GSMOUT
GND
GSM
OUTPUT
VCC
8
VCC
10µF
3.3nH
DCS INPUT
(1805MHz TO 1880MHz)
8.2nH
MAX2652
68pF
5.6pF
100pF
10
GAIN
220pF
6.8nH
VCC
4
DCSIN
DCSOUT
BAND
GND
1.2pF
DCS
OUTPUT
7
1.1pF
5
6
2.2nH
220pF
220pF
910Ω
1µF
VCC
LOGIC-LEVEL
BAND CONTROL
Figure 2. MAX2652 Typical Application Circuit
LOGIC-LEVEL
SHUTDOWN CONTROL
LOGIC-LEVEL
GAIN CONTROL
1k
1k
MAX2653
1
100pF
SHDN
GAIN
GND
VCC
8
VCC
100pF
200pF
2
3.3nH
DCS INPUT
(1805MHz TO 1880MHz)
3
DCSIN
DCSOUT
7
1.0pF
(0.8pF*)
6
2200pF
1.5pF
4
GND
GND
5
330Ω
(510Ω*)
2.7nH
(2.2nH*)
47pF
VCC
* FOR OPTIMUM PCS-BAND (1930MHz TO 1990MHz) PERFORMANCE, USE THESE COMPONENTS.
Figure 3. MAX2653 Typical Application Circuit
14
______________________________________________________________________________________
DCS
OUTPUT
GSM900 and DCS1800/PCS1900
Dual-Band, Low-Noise Amplifiers
Gain Select
The MAX2651/MAX2652/MAX2653 offer a step gain in
the LNA to optimize the receiver’s dynamic range. A
logic-level low at GAIN reduces the active LNA’s gain
by about 20dB and reduces supply current by 3.5mA.
Shutdown Functionality
The MAX2652/MAX2653 offer a low-current shutdown
feature. Drive SHDN low to power down the LNA and
reduce supply current to less than 0.25µA.
Applications Information
External Components
The MAX2651/MAX2652/MAX2653 require matching
circuits at their inputs and outputs for operation in a
50Ω system. The application circuits in Figures 1, 2,
and 3 describe the matching circuits for each device’s
LNA; suggested component values, suppliers, and part
numbers are listed in the MAX2651/MAX2652/
MAX2653 EV kits manual. These values are optimized
for best simultaneous noise figure, gain, and return loss
performance.
Input and output impedance matching networks are
very sensitive to layout-related parasitics. It is important
to keep all matching components as close to the
device as possible to minimize the effects of stray
inductance and stray capacitance of PC board traces,
particularly for the 1800MHz and 1900MHz bands.
Layout and Power-Supply Bypassing
A properly designed PC board is essential to any
RF/microwave circuit. Be sure to use controlled impedance lines on all high-frequency inputs and outputs.
Proper grounding of the GND pins is fundamental; if
the PC board uses a topside RF ground, connect all
GND pins directly to it. For boards where the ground
plane is not on the component side, it’s best to connect
all GND pins to the ground plane with plated throughholes close to the package.
To minimize coupling between different sections of the
system, the ideal power-supply layout is a star configuration with a large decoupling capacitor at a central
VCC node. The VCC traces branch out from this central
node, each leading to a separate VCC node on the PC
board. A second bypass capacitor that has low ESR at
the RF frequency of operation is placed at the end of
each trace. This arrangement provides local decoupling at the VCC pin. At high frequencies, any signal
leaking out of one supply pin sees a relatively high
impedance (formed by the VCC trace inductance) to
the central VCC node and an even higher impedance to
any other supply pin, as well as a low impedance to
ground through its bypass capacitor.
Chip Information
MAX2651 TRANSISTOR COUNT: 272
MAX2652 TRANSISTOR COUNT: 272
MAX2653 TRANSISTOR COUNT: 253
Using the Collector Load Resistor
to Set Gain
The MAX2651/MAX2652/MAX2653 provide open-collector output stages to allow an external resistor to set
the gain. The collector pull-up resistors set the gain for
each LNA to about 18dB. Lower gains are achieved by
reducing this resistance, and higher gains are
achieved by increasing it. The maximum achievable
gain is defined by the maximum collector current
swing. Note that the value of the collector gain-setting
resistor principally defines the LNA’s output impedance, and that the matching networks are tuned to
match this impedance to 50Ω. Redefining the LNA gain
by changing the collector gain-setting resistor requires
retuning the output matching networks.
______________________________________________________________________________________
15
MAX2651/MAX2652/MAX2653
Detailed Description
GSM900 and DCS1800/PCS1900
Dual-Band, Low-Noise Amplifiers
10LUMAX.EPS
8LUMAXD.EPS
MAX2651/MAX2652/MAX2653
Package Information
Note: The packages for these devices do not feature the exposed pad.
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.
16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 1999 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.