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MAX3524EVB

器件型号:MAX3524EVB
器件类别:无线/射频/通信    射频和微波   
厂商名称:Maxim(美信半导体)
厂商官网:https://www.maximintegrated.com/en.html
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器件描述

44 MHz - 880 MHz RF/MICROWAVE WIDE BAND LOW POWER AMPLIFIER

44 MHz - 880 MHz 射频/微波宽带低功率放大器

参数
参数名称属性值
是否无铅含铅
是否Rohs认证不符合
厂商名称Maxim(美信半导体)
包装说明MO-187C, USOP-10
Reach Compliance Code_compli
特性阻抗50 Ω
构造COMPONENT
增益7.6 dB
最大输入功率 (CW)
JESD-609代码e0
安装特点SURFACE MOUNT
功能数量1
端子数量10
最大工作频率880 MHz
最小工作频率44 MHz
最高工作温度85 °C
最低工作温度-40 °C
封装主体材料PLASTIC/EPOXY
封装等效代码TSSOP10,.19,20
电源5 V
射频/微波设备类型WIDE BAND LOW POWER
最大压摆率95 mA
表面贴装YES
端子面层Tin/Lead (Sn/Pb)

文档预览

19-1764; Rev 2; 6/05
Low-Noise, High-Linearity
Broadband Amplifier
General Description
The MAX3524 broadband amplifier is designed specifi-
cally for cable television receiver and cable modem
applications. The MAX3524 is a single-ended input, dif-
ferential-output low-noise amplifier (LNA) that offers
15dB of gain. It operates from a +4.75V to +5.25V sin-
gle supply from 44MHz to 880MHz. The MAX3524
includes an operational amplifier that is used to control
an off-chip PIN attenuator circuit at the input of the LNA.
The attenuator is typically used to regulate the input
signal to a value that maintains high linearity for large
signals. The MAX3524 is available in a 10-pin µMAX
®
package with an exposed paddle (EP) and operates in
the extended temperature range (-40°C to +85°C).
Features
o
Single-Ended Input, Differential Output
o
+4.75V to +5.25V Single-Supply Operation
o
Broadband Operation: 44MHz to 880MHz
o
Low Noise Figure: 4.2dB
o
High Linearity: IIP2 (42dBm), IIP3(14dBm)
o
Voltage Gain: 15dB
o
Independent On-Chip Op Amp
MAX3524
Applications
Cable Modems
Cable Set-Top Boxes
Broadband Amplifiers
CATV Infrastructures
µMAX is a registered trademark of Maxim Integrated Products, Inc.
PART
MAX3524EVB
MAX3524EVB+
Ordering Information
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
10 µMAX-EP*
10 µMAX-EP*
*EP
= Exposed paddle.
+Denotes
lead-free package.
Typical Application Circuit
V
CC
= 5V
10µF
0.1µF
L1 = 0.5nH TO 1nH
C
L
< 1.8pF
OUTPUT TO TUNER
(DIFFERENTIAL DRIVE)
V
CC
= 5V
10µF
10nF
0.1µF
3
RFGND
OPOUT
OP AMP
D2
CMDSH-3
L
BIAS
= 680nH
8
RFOUT+
OPIN+
7
0.1µF
FROM DEMOD IC
TO CONTROL PIN
ATTENUATOR
L2 = 0.5nH TO 1nH
1
V
CC
RFOUT- 10
INPUT:
44-880MHz
75Ω TO 2kΩ
0.1µF
PIN
ATTENUATOR
2
RFIN
MAX3524
V
CC
9
4
R1
3kΩ
5
OPIN-
GND
*
BIAS
6
R
BIAS
= 5.9Ω
R2
3kΩ
D1
CMDSH-3
*EXPOSED PADDLE
Pin Configuration appears at end of data sheet.
________________________________________________________________
Maxim Integrated Products
1
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.
Low-Noise, High-Linearity
Broadband Amplifier
MAX3524
ABSOLUTE MAXIMUM RATINGS
V
CC
to GND ...........................................................-0.3V to +7.0V
RFIN ....................................................................................+2.0V
P
RFIN
...................................................................................0dBm
R
BIAS (MINIMUM)
.......................................................................5Ω
RFOUT+, RFOUT-, OPIN-, OPIN+, OPOUT...-0.3V to (V
CC
+ 0.3V)
RFOUT+, RFOUT- Short-Circuit Duration ...............................10s
Continuous Power Dissipation (T
A
= +70°C)
10-Pin µMAX (derate 10.3mW/°C above +70°C) .........825mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10s) .................................+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.
CAUTION!
ESD SENSITIVE DEVICE
DC ELECTRICAL CHARACTERISTICS
(Typical
Application Circuit,
V
CC
= +4.75V to +5.25V, R
BIAS
= 5.9Ω, L
BIAS
= 680nH, T
A
= -40°C to +85°C, unless otherwise indicat-
ed. Typical values measured at V
CC
= +5.0V, T
A
= +25°C.) (Notes 1, 2)
PARAMETERS
SUPPLY
Supply Voltage
Supply Current
OPERATIONAL AMPLIFIER
Common-Mode Input Range
Maximum Output Voltage
Minimum Output Voltage
I
O
= 20mA
I
O
= 20mA
0.5
V
CC
- 0.5
0.5
4.75
85
5.25
95
3.0
V
mA
V
V
V
CONDITIONS
MIN
TYP
MAX
UNITS
AC ELECTRICAL CHARACTERISTICS
(MAX3524 EV kit as shown in Figure 1, V
CC
= +4.75V to +5.25V, P
RFIN
= -20dBm, Z
S
= 75Ω, R
BIAS
= 5.9Ω, L
BIAS
= 680nH,
f
IN
= 44MHz, Z
L
= 50Ω || 2pF, T
A
= +25°C. Typical values are at V
CC
= +5V, unless otherwise indicated.) (Notes 2, 3)
PARAMETERS
Operating Frequency Range
Power Gain (Note 4)
Voltage Gain (Note 5)
Noise Figure (Note 3)
IIP3 (Notes 3, 6)
IIP2 (Notes 3, 6)
Output-to-Input Isolation
f
RFIN
= 300MHz
T
A
= +25°C
T
A
= -40°C to +85°C
R
L
= 3kΩ
f
RFIN
= 300MHz
12
40
40
CONDITIONS
MIN
44
8.0
7.6
15
4.2
14
42
60
4.9
9.8
TYP
MAX
880
11
11.5
UNITS
MHz
dB
dB
dB
dBm
dBm
dB
Note 1:
Parameters are production tested at T
A
= +25°C and T
A
= +85°C. Limits are guaranteed by design and characterization for
T
A
= -40°C to +25°C.
Note 2:
For optimum linearity, the DC resistance of L
BIAS
in series with R
BIAS
must be approximately 7.3Ω.
Note 3:
Guaranteed by design and characterization.
Note 4:
Gain is guaranteed over the operating frequency range, by design and characterization. Insertion loss of balun is subtracted.
Production tested at 44MHz and 880MHz.
Note 5:
Corresponding voltage gain at R
L
= 3kΩ, calculated as in Figure 2.
Note 6:
Frequencies and input power levels: 275MHz, 325MHz, and -20dBm per tone.
2
_______________________________________________________________________________________
Low-Noise, High-Linearity
Broadband Amplifier
MAX3524
Typical Operating Characteristics
(MAX3524 EV kit as shown in Figure 1, V
CC
= +5V, P
RFIN
= -20dBm, Z
L
= 50Ω || 2pF, R
BIAS
= 5.9Ω, L
BIAS
= 680nH, insertion loss of
balun subtracted, T
A
= +25°C.)
CURRENT vs. VOLTAGE
MAX3524toc01
POWER GAIN vs. FREQUENCY
MAX3524 toc02
POWER GAIN vs. FREQUENCY
13
12
Zs = 75Ω
C
L
= 1.5pF
MAX3524 toc03
90
89
88
I
CC
(mA)
87
86
85
84
T
A
= +85°C
83
82
T
A
= +25°C
T
A
= -40°C
12
11
10
GAIN (dB)
9
8
7
6
Zs = 50Ω
C
L
= 1.5pF
T
A
= -45°C
T
A
= +25°C
T
A
= +85°C
14
GAIN (dB)
11
10
9
8
7
6
T
A
= -40°C
T
A
= +25°C
T
A
= +85°C
4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 5.5
V
CC
(V)
40 140 240 340 440 540 640 740 840 940
FREQUENCY (MHz)
40 140 240 340 440 540 640 740 840 940
FREQUENCY (MHz)
POWER GAIN vs. FREQUENCY
MAX3524 toc04
POWER GAIN vs. FREQUENCY
T
A
= +25°C
Z
s
= 75Ω
C
L
= 1.5pF
MAX3524 toc05
NOISE FIGURE vs. FREQUENCY
T
A
= +85°C
5
NOISE FIGURE (dB)
4
T
A
= +25°C
3
2
1
0
T
A
= -40°C
MAX3524 toc06
12
11
10
GAIN (dB)
9
8
7
6
T
A
= +25°C
Z
s
= 50Ω
C
L
= 1.5pF
12
11
10
GAIN (dB)
6
V
CC
= 4.75, 5.00, 5.25
V
CC
= 4.75, 5.00, 5.25
9
8
7
6
40 140 240 340 440 540 640 740 840 940
FREQUENCY (MHz)
40 140 240 340 440 540 640 740 840 940
FREQUENCY (MHz)
40 140 240 340 440 540 640 740 840 940
FREQUENCY (MHz)
IIP3 vs. FREQUENCY
MAX3524 toc07
IIP2 vs. FREQUENCY
Zs = 75Ω
MAX3524 toc08
1dB COMPRESSED OUTPUT POWER
vs. FREQUENCY
MAX3524toc09
20
18
16
IIP3 (dBm)
Zs = 75Ω
T
A
= -40°C
60
55
16
14
12
V
CC
= 5.25V
T
A
= +85°C
T
A
= +25°C
45
40
35
30
T
A
= -40°C
P
OUT
(dBm)
50
IIP2 (dBm)
14
12
10
8
T
A
= +25°C
T
A
= +85°C
10
8
V
CC
= 4.75V V
CC
= 5.00V
6
4
50 150 250 350 450 550 650 750 850 950
FREQUENCY (MHz)
100 200 300 400 500 600 700 800 900 1000
FREQUENCY (MHz)
40 140 240 340 440 540 640 740 840 940
FREQUENCY (MHz)
_______________________________________________________________________________________
3
Low-Noise, High-Linearity
Broadband Amplifier
MAX3524
Typical Operating Characteristics (continued)
(MAX3524 EV kit as shown in Figure 1, V
CC
= +5V, P
RFIN
= -20dBm, Z
L
= 50Ω || 2pF, R
BIAS
= 5.9Ω, L
BIAS
= 680nH, insertion loss of
balun subtracted, T
A
= +25°C.)
ISOLATION vs. FREQUENCY
PSRR vs. FREQUENCY
MAX3524toc10
-45
-50
ISOLATION (dB)
-45
-50
PSRR (dB)
-55
-60
-65
-70
-75
-80
-55
-60
-65
-70
-75
-80
40
240
440
640
840
FREQUENCY (MHz)
20
70
120
170
220
FREQUENCY (MHz)
RESISTANCE AND CAPACITANCE
vs. FREQUENCY
400
350
300
RESISTANCE (Ω)
250
200
150
1.5
100
50
0
40
240
440
640
840
FREQUENCY (MHz)
1
1
0
CAPACITANCE
RESISTANCE
CAPACITANCE (pF)
2.0
V
GAIN
(dB)
MAX3524 toc12
OP AMP CLOSED-LOOP VOLTAGE GAIN
OF 2 vs. FREQUENCY
MAX3524 toc13
Z
IN
= R II C
2.5
6
5
4
3
2
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
FREQUENCY (MHz)
Pin Description
PIN
1, 9
2
3
4
5
6
7
8
10
Slug
NAME
V
CC
RFIN
RFGND
OPOUT
OPIN-
BIAS
OPIN+
RFOUT-
RFOUT+
GND
FUNCTION
Supply Voltage Input. Connect both pins together. Bypass with a 10µF and 47pF capacitor to
GND.
RF Input of LNA. Requires DC blocking capacitor.
Bypass to GND through 10nF capacitor.
Operational Amplifier Output
Inverting Input of Operational Amplifier
LNA Bias Setting Pin. For nominal bias, connect 5.9Ω resistor in series with 680nH to GND
(total DC resistance = resistance of R
BIAS
+ DC resistance of the inductor = 7.3Ω). The value of
the resistor is adjusted to alter the current and therefore linearity of the LNA.
Noninverting Input of Operational Amplifier
Inverting Output of LNA
Noninverting Output of LNA
Ground
4
_______________________________________________________________________________________
MAX3524toc11
-40
-40
Low-Noise, High-Linearity
Broadband Amplifier
Detailed Description
The MAX3524 is a broadband amplifier with a single-
ended input and differential outputs, including an oper-
ational amplifier that can be used to control an external
attenuator circuit. Figure 1 is the MAX3524 EV kit
schematic.
3kΩ load. At 300MHz, the noise figure is 4.2dB, IIP2
and IIP3 are 42dBm and 14dBm, respectively.
MAX3524
Operational Amplifier
The operational amplifier is suitable for interfacing to a
PIN attenuator circuit which is typically employed at the
input of the LNA. The common-mode input range is
0.5V to 3V and the output voltage swing is 0.5V to V
CC
-
0.5V while sinking or sourcing 20mA. Input bias current
and input offset voltage are 1µA and 1mV, respectively.
The open-loop voltage gain is greater than 10,000. The
gain bandwidth product is greater than 1MHz for a
closed-loop voltage gain of one.
C15
0.1µF
Low-Noise Amplifier
The low-noise amplifier operates from 44MHz to
880MHz and is designed specifically for cable TV and
cable modem applications. The LNA provides 15dB of
insertion voltage gain (see Figure 2) when driving a
V
CC
C1
47pF
C10
0.1µF
RF INPUT
R1
13.3Ω
V
CC
R2
C11
0.1µF
TO
ATTENUATOR
C12
0.1µF
R4
50kΩ
RFGND
R9
100Ω
R3
50kΩ
V
CC
RFIN
RF OUT-
V
CC
VCC2
RF OUT+
C14
47pF
C15
0.1µF
RF OUTPUT
C2
2pF
OPIN+
OP OUT
0.1µF
R10
3kΩ
BIAS
D1
OP IN
R8
3kΩ R7
10kΩ
D2
V
CC
L
BIAS
R
BIAS
5.81Ω
D1, D2 SMALL-SIGNAL SCHOTTKY DIODES, TYPICALLY CMDSH-3
Figure 1. MAX3524 EV Kit Schematic
V
CC
(PIN9)
75Ω
Z
S
330Ω
2V
IN
1.8pF
30Ω
RFIN
V1
A
V
= (V
RFOUT +
) - (V
RFOUT
-) = 5.7
V
IN
A
V
(dB) = 20log
10
A
V
= 15dB
30Ω
RFOUT+
0.06V1
RFOUT-
Figure 2. LNA Equivalent Circuit and Open-Circuit Voltage Gain Calculation
_______________________________________________________________________________________
5

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