MAX2640 [MAXIM]
400MHz to 2500MHz SiGe Ultra-Low-Noise Amplifiers; 400MHz至2500MHz的硅锗超低噪声放大器
| 型号： | MAX2640 |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | 400MHz to 2500MHz SiGe Ultra-Low-Noise Amplifiers |
| 文件： | 总8页 (文件大小：113K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-1384; Rev 1; 2/99
4 0 0 MHz t o 2 5 0 0 MHz S iGe
Ult ra -Lo w -No is e Am p lifie rs
0/MAX2641
Ge n e ra l De s c rip t io n
Fe a t u re s
The MAX2640/MAX2641 are low-cost, ultra-low-noise
amplifiers designed for applications in the cellular, PCS,
GPS, and 2.4GHz ISM frequency bands. Operating from
a single +2.7V to +5.5V supply, these devices consume
only 3.5mA of current while providing a low noise fig-
ure, high gain, high input IP3, and an operating fre-
quency range that extends from 400MHz to 2500MHz.
♦ Wide Operating Frequency Range
MAX2640: 400MHz to 1500MHz
MAX2641: 1400MHz to 2500MHz
♦ Low Noise Figure
MAX2640: 0.9dB at 900MHz
MAX2641: 1.2dB at 1575MHz
1.3dB at 1900MHz
The MAX2640 is optimized for 400MHz to 1500MHz
applications, with a typical performance of 15.1dB gain,
input IP3 of -10dBm, and a noise figure of 0.9dB at
900MHz. The MAX2641 is optimized for 1400MHz to
2500MHz applications, with a typical performance of
14.4dB gain, an input IP3 of -4dBm, and a noise figure
of 1.3dB at 1900MHz.
1.5dB at 2450MHz
♦ High Gain
MAX2640: 15.1dB at 900MHz
MAX2641: 15.7dB at 1575MHz
14.4dB at 1900MHz
13.5dB at 2450MHz
These devices are internally biased, eliminating the
need for external bias resistors and chokes. In a typical
application, the only external components needed are a
two-element input match, input and output blocking
♦ High Reverse Isolation
MAX2640: 40dB at 900MHz
MAX2641: 31dB at 1575MHz
30dB at 1900MHz
capacitors, and a V bypass capacitor.
CC
24dB at 2450MHz
The MAX2640/MAX2641 are designed on a high-fre-
q ue nc y, low-nois e , a d va nc e d s ilic on-g e rma nium
proc e ss a nd a re offe re d in the sp a c e -sa ving 6-pin
SOT23 package.
♦ +2.7V to +5.5V Single-Supply Operation
♦ Low 3.5mA Supply Current
♦ Ultra-Small SOT23-6 Package
Ap p lic a t io n s
400MHz/900MHz/2.4GHz ISM Radios
Cellular/PCS Handsets
GPS Receivers
Ord e rin g In fo rm a t io n
TEMP.
PIN-
SOT
PART
RANGE
PACKAGE TOP MARK
MAX2640EUT-T -40°C to +85°C 6 SOT23-6
MAX2641EUT-T -40°C to +85°C 6 SOT23-6
AAAV
AAAW
Cordless Phones
Wireless LANs
Pin Configuration appears at end of data sheet.
Wireless Data
Typ ic a l Op e ra t in g Circ u it s
V
CC
C4
C3
V
CC
C2
C3
C4
C1
VALUE
Z1*
ZM1
FREQUENCY (MHz)
ZM2
VALUE
VALUE VALUE VALUE
(pF)
VALUE VALUE
(nH)
BIAS GENERATOR
LNA
(pF)
(pF)
MAX2640 MAX2641 (pF)
(pF)
C1
C2
Z1
900
—
—
—
—
470
100
470
470
3
470
—
9.85
2
—
6.8nH
1pF
RFIN
RF OUT
ZM2
RFIN
RF OUT
1575
1900
2450
100
100
100
470
470
470
—
—
5.6
1
1
1
ZM1
2.55
1.65
MAX2640/1
100
1pF
GND
*The series inductor Z1 can be replaced by a transmission line of appropriate impedance
and electrical length.
________________________________________________________________ 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.
4 0 0 MHz t o 2 5 0 0 MHz S iGe
Ult ra -Lo w -No is e Am p lifie rs
ABSOLUTE MAXIMUM RATINGS
V
CC
to GND .............................................................-0.3V to +6V
Operating Temperature Range ...........................-40°C to +85°C
Maximum Junction Temperature .....................................+150°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
RFIN Power (50Ω source) (Note 1) ..................................+5dBm
Continuous Power Dissipation (T = +70°C)
A
SOT23-6 (derate 8.7mW/°C above +70°C)..................696mW
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.
Note 1: Pin must be AC-coupled with a DC blocking capacitor.
DC ELECTRICAL CHARACTERISTICS
(V = +2.7V to +5.5V, T = T
to T unless otherwise noted. Typical values are at V = +3.0V, T = +25°C.)
MAX, CC A
CC
A
MIN
PARAMETER
CONDITIONS
MIN
TYP
MAX
5.5
UNITS
Operating Supply Voltage
2.7
V
T
= +25°C
3.5
4.7
A
Operating Supply Current
mA
0/MAX2641
T
A
= -40°C to +85°C
6.4
RF ELECTRICAL CHARACTERISTICS
(V = +3.0V, P
CC
= -34dBm, Z = 50Ω, T = +25°C, unless otherwise noted.) (Notes 2 and 3)
RFIN
O A
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
MAX2640 (f
= 900MHz)
RFIN
RFIN Frequency Range
Gain
400
1500
MHz
dB
12.8
15.1
0.6
0.9
-11
-14
40
Gain Variation Over Temperature
Noise Figure
T
= T
to T
MAX
1.7
1.1
dB
A
MIN
(Note 4)
dB
Input Return Loss
dB
Output Return Loss
dB
Reverse Isolation
dB
Input 1dB Gain Compression Point
Input Third-Order Intercept Point
-22
-10
dBm
dBm
(Note 5)
MAX2641 (f
= 1900MHz)
RFIN
RFIN Frequency Range
Gain
1400
12.4
2500
MHz
dB
14.4
0.9
1.3
-12
-12
30
Gain Variation Over Temperature
Noise Figure
T
= T
to T
MAX
2.4
1.5
dB
A
MIN
(Note 4)
dB
Input Return Loss
dB
Output Return Loss
dB
Reverse Isolation
dB
Input 1dB Gain Compression Point
Input Third-Order Intercept Point
-21
-4
dBm
dBm
(Note 6)
2
_______________________________________________________________________________________
4 0 0 MHz t o 2 5 0 0 MHz S iGe
Ult ra -Lo w -No is e Am p lifie rs
0/MAX2641
RF ELECTRICAL CHARACTERISTICS (continued)
(V = +3.0V, P
CC
= -34dBm, Z = 50Ω, T = +25°C, unless otherwise noted.) (Notes 2 and 3)
RFIN
O A
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
MAX2641 (f
= 1575MHz)
RFIN
Gain
15.7
1.2
-8
dB
dB
Noise Figure
(Note 4)
Input Return Loss
dB
Output Return Loss
Reverse Isolation
-15
-31
-21
+1.4
dB
dB
Input 1dB Gain Compression Point
Input Third-Order Intercept Point
dBm
dBm
(Note 7)
(Note 4)
MAX2641 (f
= 2450MHz)
RFIN
Gain
13.5
1.5
dB
dB
Noise Figure
Input Return Loss
-10
-11
-24
-19
-2.5
dB
Output Return Loss
dB
Reverse Isolation
dB
Input 1dB Gain Compression Point
Input Third-Order Intercept Point
dBm
dBm
(Note 8)
Note 2: Guaranteed by design and characterization.
Note 3: Measured using typical operating circuit. Input and output impedance matching networks were optimized for best simulta-
neous gain and noise-figure performance.
Note 4: External component and circuit losses degrade noise-figure performance. Specification excludes external component and
circuit board losses.
Note 5: Measured with two input tones, f = 899MHz, f = 901MHz, both at -34dBm per tone.
1
2
Note 6: Measured with two input tones, f = 1899MHz, f = 1901MHz, both at -34dBm per tone.
1
2
Note 7: Measured with two input tones, f = 1574MHz, f = 1576MHz, both at -34dBm per tone.
1
2
Note 8: Measured with two input tones, f = 2449MHz, f = 2451MHz, both at -34dBm per tone.
1
2
Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s
= -34dBm, Typical Operating Circuits, T = +25°C, unless otherwise noted.)
A
(V = +3V, P
CC
RFIN
MAX2640
MAX2640 MATCHED AT 900MHz
GAIN vs. FREQUENCY
MAX2640 MATCHED AT 900MHz
NOISE FIGURE vs. FREQUENCY
SUPPLY CURRENT vs. SUPPLY VOLTAGE
6
5
4
3
2
1
0
16
15
14
13
12
3
2
1
0
T = -40°C
A
T = +85°C
A
T = +85°C
A
T = +25°C
A
T = +25°C
A
T = -40°C
A
T = +85°C
A
T = +25°C
A
T = -40°C
A
2
3
4
5
6
800
840
880
920
960
1000
800
840
880
920
960
1000
V
CC
(V)
FREQUENCY (MHz)
FREQUENCY (MHz)
_______________________________________________________________________________________
3
4 0 0 MHz t o 2 5 0 0 MHz S iGe
Ult ra -Lo w -No is e Am p lifie rs
Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s (c o n t in u e d )
= -34dBm, Typical Operating Circuits, T = +25°C, unless otherwise noted.)
A
(V = +3V, P
CC
RFIN
MAX2640 MATCHED AT 900MHz
INPUT RETURN LOSS AND
MAX2640 MATCHED AT 900MHz
MAX2641
OUTPUT RETURN LOSS vs. FREQUENCY
REVERSE ISOLATION vs. FREQUENCY
SUPPLY CURRENT vs. SUPPLY VOLTAGE
-6
-7
0
-10
-20
-30
-40
6
5
4
3
2
1
0
-8
T = +85°C
A
-9
INPUT RETURN LOSS
-10
-11
-12
-13
-14
-15
-16
T = +25°C
A
T = -40°C
A
-50
-60
OUTPUT RETURN LOSS
800
850
900
950
1000
800
840
880
920
960
1000
2
3
4
5
6
0/MAX2641
FREQUENCY (MHz)
FREQUENCY (MHz)
V
CC
(V)
MAX2641 MATCHED AT 1900MHz
GAIN vs. FREQUENCY
MAX2641 MATCHED AT 1900MHz
NOISE FIGURE vs. FREQUENCY
3
2
1
0
16
15
14
13
12
T = -40°C
A
T = +85°C
A
T = +25°C
A
T = +85°C
A
T = +25°C
A
T = -40°C
A
1800
1840
1880
1920
1960
2000
1800
1840
1880
1920
1960
2000
FREQUENCY (MHz)
FREQUENCY (MHz)
MAX2641 MATCHED AT 1900MHz
INPUT RETURN LOSS AND
OUTPUT RETURN LOSS vs. FREQUENCY
MAX2641 MATCHED AT 1900MHz
REVERSE ISOLATION vs. FREQUENCY
-6
-7
0
-10
-20
-30
-40
-8
-9
-10
-11
-12
-13
-14
-15
-16
INPUT RETURN LOSS
OUTPUT RETURN LOSS
-50
-60
1800
1840
1880
1920
1960
2000
1800
1850
1900
1950
2000
FREQUENCY (MHz)
FREQUENCY (MHz)
4
_______________________________________________________________________________________
4 0 0 MHz t o 2 5 0 0 MHz S iGe
Ult ra -Lo w -No is e Am p lifie rs
0/MAX2641
P in De s c rip t io n
PIN
NAME
RFIN
FUNCTION
Amplifier Input. AC-couple to this pin with a DC blocking capacitor. Use recommended input matching
network (see Typical Operating Circuit).
1
2, 3, 5
4
GND
Ground. For optimum performance, provide a low inductance connection to the ground plane.
Amplifier Output. Use the recommended series blocking or matching capacitor (see Typical Operating
Circuit).
RFOUT
Supply Voltage. Bypass to ground directly at the supply pin. The value of the bypass capacitor is deter-
6
V
CC
mined by the lowest operating frequency. Additional bypassing may be necessary for long V lines (see
CC
Typical Operating Circuit).
De t a ile d De s c rip t io n
Ap p lic a t io n s In fo rm a t io n
The MAX2640 and MAX2641 are ultra-low-noise ampli-
fiers that operate with RF input frequency ranges of
400MHz to 1500MHz (MAX2640) or 1400MHz to
2500MHz (MAX2641). These devices are available in
SOT23-6 packages and contain internal bias circuitry to
minimize the number of required external components.
Their small size and low external component count
make them ideal for applications where board space is
limited.
Ex t e rn a l Ma t c h in g Co m p o n e n t s
The MAX2640/MAX2641 are easy to use, generally
requiring only five external components as shown in the
Typical Operating Circuit. To reduce external compo-
ne nt c ount furthe r, re p la c e e xte rna l ind uc tors with
microstrip transmission lines. The high reverse isolation
allows the tuning of the input matching network without
affecting the output match, and vice versa. Select input
and output matching networks to obtain the desired
combination of gain, noise figure, and return loss per-
formance. The Typical Operating Circuits show the rec-
ommended input and output matching networks for
the MAX2640/MAX2641 a t 900MHz a nd 1900MHz,
re s p e c tive ly. The s e va lue s a re op timize d for b e s t
simultaneous gain, noise figure, and return loss perfor-
mance. To aid in the design of matching networks for
other frequencies, Tables 1 and 2 list typical device S-
parameters and Tables 3 and 4 list typical device noise
parameters.
_______________________________________________________________________________________
5
4 0 0 MHz t o 2 5 0 0 MHz S iGe
Ult ra -Lo w -No is e Am p lifie rs
Table 1. MAX2640 Typical Scattering Parameters at V
= +3V, T = +25°C
A
CC
FREQUENCY
(MHz)
S11
MAG
S21
MAG
S12
MAG
S22
PHASE
PHASE
PHASE
PHASE
MAG
400
500
0.907
0.882
0.858
0.832
0.810
0.788
0.771
0.749
0.735
0.720
0.702
0.688
-35.1
-43.1
-50.8
-58.1
-64.9
-71.0
-76.6
-82.3
-88.0
-93.4
-98.8
-104.9
4.62
4.70
4.76
4.80
4.85
4.77
4.74
4.55
4.48
4.24
4.17
3.81
109.1
90.4
0.001
0.001
0.001
0.002
0.004
0.005
0.007
0.010
0.013
0.015
0.021
0.024
13.5
64.7
55.2
39.4
64.2
36.3
28.0
12.3
-10.6
-28.2
-42.9
-59.8
0.302
0.33
108.4
93.6
81.5
69.4
56.8
44.7
33.5
21.9
10.7
-0.2
600
70.7
0.352
0.365
0.384
0.396
0.412
0.436
0.455
0.469
0.482
0.489
700
50.6
800
29.5
900
9.2
1000
1100
1200
1300
1400
1500
-12.0
-32.4
-53.4
-75.9
-94.9
-117.5
-9.9
-20.2
0/MAX2641
Table 2. MAX2641 Typical Scattering Parameters at V
= +3V, T = +25°C
A
CC
FREQUENCY
(MHz)
S11
MAG
S21
MAG
S12
MAG
S22
PHASE
PHASE
PHASE
PHASE
MAG
1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
2500
0.734
0.717
0.695
0.678
0.661
0.646
0.632
0.620
0.610
0.604
0.603
-75.5
-80.3
4.397
4.209
4.193
3.876
3.801
3.456
3.302
2.981
2.781
2.430
2.118
-90.5
-109.8
-131.6
-150.0
-173.5
166.9
146.4
123.6
105.3
82.9
0.013
0.016
0.018
0.021
0.023
0.026
0.028
0.029
0.033
0.032
0.030
-80.3
-91.9
0.535
0.514
0.513
0.510
0.493
0.470
0.431
0.403
0.374
0.338
0.316
17.7
8.6
-85.3
-116.5
-128.7
-150.6
-166.6
171.7
150.7
132.2
111.2
95.7
-0.5
-90.6
-10.6
-21.6
-32.0
-43.4
-56.1
-69.4
-86.2
-98.3
-96.6
-102.6
-108.8
-114.0
-119.4
-124.6
-128.4
64.7
6
_______________________________________________________________________________________
4 0 0 MHz t o 2 5 0 0 MHz S iGe
Ult ra -Lo w -No is e Am p lifie rs
0/MAX2641
Table 3. MAX2640 Typical Noise Parameters at V
= +3V, T = +25°C
A
CC
Γ
Γ
ANGLE
opt
FREQUENCY (MHz)
f
(dB)
R ( )
Ω
N
opt
MIN
400
500
0.66
0.56
0.54
0.51
0.48
0.46
0.43
0.40
0.37
0.35
0.32
0.29
0.26
21
25
30
35
40
45
50
56
62
68
77
84
12.5
11.9
11.3
10.8
10.2
9.7
0.69
0.72
0.75
0.78
0.82
0.85
0.89
0.93
0.97
1.01
1.06
600
700
800
900
1000
1100
1200
1300
1400
1500
9.3
8.8
8.3
7.9
7.4
7.0
Table 4. MAX2641 Typical Noise Parameters at V
= +3V, T = +25°C
A
CC
Γ
Γ
ANGLE
opt
FREQUENCY (MHz)
f
(dB)
R ( )
Ω
N
opt
MIN
1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
2500
1.02
0.43
0.40
0.38
0.36
0.32
0.30
0.28
0.25
0.22
0.19
0.17
44
47
50
54
58
62
66
71
77
82
91
12.4
11.8
11.3
10.8
10.3
9.9
1.05
1.08
1.10
1.14
1.17
1.20
1.23
1.27
1.30
1.34
9.4
9.0
8.6
8.3
8.0
Proper grounding of the GND pins is essential. If the
PC board uses a topside RF ground, connect it directly
to all GND pins. For a board where the ground plane is
not on the component side, the best technique is to
c onne c t the GND p in to the b oa rd with a p la te d
through-hole close to the package.
La yo u t a n d P o w e r-S u p p ly Byp a s s in g
A p rop e rly d e s ig ne d PC b oa rd is e s s e ntia l to a ny
RF/microwave circuit. Be sure to use controlled imped-
ance lines on all high-frequency inputs and outputs.
The power supply should be bypassed with decoupling
capacitors located close to the device V
pins. For
CC
long V
lines, it may be necessary to add additional
CC
decoupling capacitors. These additional capacitors
can be located further away from the device package.
_______________________________________________________________________________________
7
4 0 0 MHz t o 2 5 0 0 MHz S iGe
Ult ra -Lo w -No is e Am p lifie rs
P in Co n fig u ra t io n
TOP VIEW
RFIN
GND
GND
1
2
3
6
5
4
V
CC
MAX2640
MAX2641
GND
RFOUT
SOT23-6
P a c k a g e In fo rm a t io n
0/MAX2641
8
_______________________________________________________________________________________
相关型号：
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