MAX2410_1 [MAXIM]
Evaluation Kit; 评估套件型号: | MAX2410_1 |
厂家: | MAXIM INTEGRATED PRODUCTS |
描述: | Evaluation Kit |
文件: | 总8页 (文件大小:83K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
19-1320; Rev 1; 3/98
MAX2 4 1 0 Eva lu a t io n Kit
Evluates:MAX2410
________________Ge n e ra l De s c rip t io n
____________________________Fe a t u re s
♦ +2.7V to +5.5V Single-Supply Operation
♦ 50Ω SMA Inputs and Outputs on RF and IF Ports
♦ Allows Testing of Shutdown Mode
The MAX2410 evaluation kit (EV kit) simplifies testing of the
MAX2410. This EV kit allows evaluation of the MAX2410’s
low-nois e a mp lifie r (LNA), re c e ive d ownc onve rte r
mixer, transmit upconverter mixer, variable-gain power-
amplifier (PA) driver, and power-management features.
♦ Fully Assembled and Tested
_______________Ord e rin g In fo rm a t io n
____________________Co m p o n e n t Lis t
DESIGNATION QTY
DESCRIPTION
PART
TEMP. RANGE
IC-PACKAGE
C1, C2
2
47pF ceramic capacitors, 0603 size
MAX2410EVKIT
-40°C to +85°C
28 QSOP
10µF tantalum capacitor
AVX TAJC106K016
C3
1
______________Co m p o n e n t S u p p lie rs
C4, C5,
C6, C8
4
7
5
0.1µF ceramic capacitors, 0805 size
220pF ceramic capacitors, 0805 size
1000pF ceramic capacitors, 0805 size
SUPPLIER
PHONE
INTERNET
C7, C10, C11,
C16, C17,
C19, C20
(803) 946-0690
(803) 626-3123 FAX
AVX
http://www.avxcorp.com
(847) 639-6400
(847) 639-1469 FAX
C9, C15, C18,
C23, C24
Coilcraft
http://www.coilcraft.com
http://www.t-yuden.com
Taiyo Yuden
USA
(408) 573-4150
(408) 573-4159 FAX
C12, C14,
C22, C25, C26
0
1
1
Not installed
C21
1pF ceramic capacitor, 0805 size
18nH inductor, 0805 size
Coilcraft 0805CS-180XMBC
_________________________Qu ic k S t a rt
The MAX2410 EV kit is fully assembled and factory test-
ed. Follow these instructions for initial evaluation of the
MAX2410.
L1
5.6nH inductor, 0805 size
Taiyo Yuden HK16085N6S
L2
1
2
68nH inductors, 0805 size
Coilcraft 0805CS-680XKBC
L3, L12
Te s t Eq u ip m e n t Re q u ire d
This section lists the recommended test equipment to
verify operation of the MAX2410. It is intended as a
guide only, and some substitutions may be possible.
L4, L5
2
0
0Ω resistors, 0805 size
L6, L7, L9
Not installed
3.9nH inductors, 0805 size
Taiyo Yuden HK16083N9S
• Two RF signal generators capable of delivering at
least 0dBm of output power up to 2GHz (HP8648C,
or equivalent).
L8, L13
2
82nH inductor, 0805 size
Coilcraft 0805CS-820XKBC
L11
1
3
• An RF spectrum analyzer that covers the operating
frequency range of the MAX2410 as well as a few
harmonics (HP8561E, for example).
R1, R2, R3
1kΩ resistors, 0805 size
LNAIN,
LNAOUT, IFIN,
IFOUT, LO,
PADRIN,
PADROUT,
TXMXOUT
• A power supply which can provide up to 100mA at
+2.7V to +5.5V.
8
SMA edge-mount connectors
• A voltage source (0V to 5V) for adjusting the gain-
control (GC) voltage on the PA driver.
• An optional ammeter for measuring the supply cur-
RXMXIN
1
3
SMA PC-mount connector
3-pin headers
rent.
RXEN, TXEN,
VGC
• Several 50Ω SMA cables.
VCC, GND
U1
2
1
2-pin headers
MAX2410EEI 28-pin QSOP
________________________________________________________________ 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.
MAX2 4 1 0 Eva lu a t io n Kit
5) Connect the spectrum analyzer to the IFOUT SMA
connector. Set the spectrum analyzer to a 400MHz
c e nte r fre q ue nc y, a 200MHz tota l s p a n, a nd a
0dBm reference level.
Co n n e c t io n s a n d S e t u p
This section provides a step-by-step guide to operating
the EV kit and testing all four major functions: the LNA,
receive mixer, transmit mixer, and PA driver. Do not
turn on the DC power or RF signal generators until
all connections are made.
6) Turn on the DC supply, LO signal generator, and RF
input signal generator.
7) The downconverted output signal at 400MHz is visi-
ble on the spectrum analyzer, indicating a mixer
conversion gain of typically 8.3dB after accounting
for cable losses.
Low-Noise Amplifier
1) Set the RXEN jumper on the EV kit to the “Logic 1”
position and the TXEN jumper to the “Logic 0” posi-
tion. This enables the MAX2410’s receive mode.
2) Connect a DC supply set to 3V (through an amme-
Power-Amplifier Driver
1) Remove any RF signal connections made in the
ter if desired) to the V and GND terminals on the
CC
EV kit. Do not turn on the supply.
above tests. The V and GND connections should
CC
remain as before. Turn off the V
making connections.
supply while
3) Connect one RF signal generator to the LNAIN SMA
connector; do not turn on the generator’s output.
Set the generator for an output frequency of 1.9GHz
at a power level of -40dBm.
CC
2) Set the RXEN jumper to the “Logic 0” position and
the TXEN jumper to the “Logic 1” position. This
enables the MAX2410’s transmit mode.
4) Connect a spectrum analyzer to the LNAOUT SMA
connector on the EV kit. Set it to a center frequency
of 1.9GHz, a total span of 200MHz, and a reference
level of 0dBm.
Evluates:MAX2410
3) Set the voltage source to be used for the gain-con-
trol voltage to 2.15V, and turn it off. Connect it to the
middle pin of the V jumper on the EV kit.
GC
5) Turn on the DC supply. The supply current should
read approximately 20mA (if using an ammeter).
4) Connect an RF signal generator set to 1.9GHz, at a
power level of -10dBm with the output disabled, to
the PADRIN SMA connector.
6) Activate the RF generator’s output. A signal on the
spectrum analyzer’s display should indicate a typi-
cal gain of 16.2dB after accounting for cable losses.
5) Connect the PADROUT SMA connector to the spec-
trum analyzer. Configure the analyzer to a center
frequency of 1.9GHz, a reference level of +10dBm,
and 200MHz total span.
7) If desired, the shutdown feature can be tested by
moving the RXEN jumper into the “Logic 0” position.
The supply current should drop to less than 10µA.
6) Turn on the DC supply, V voltage source, and RF
GC
signal generator.
Receive Downconverter Mixer
1) Remove the RF signal generator and spectrum ana-
lyzer from the LNAIN and LNAOUT connections if
necessary. The DC supply connections needed for
testing the downconverter mixer are the same as in
the LNA section. Turn off the DC supply while mak-
ing connections.
7) The supply current should read typically 30mA. A
1.9GHz signal should be visible on the spectrum
analyzer’s display indicating a typical gain of 15dB
after accounting for cable losses.
8) Lowering the voltage on the V
voltage source to
GC
0V should reduce the gain by typically 35dB.
2) Set the RXEN jumper on the EV kit to the “Logic 1”
position and the TXEN jumper to the “Logic 0” posi-
tion. This enables the MAX2410’s receive mode.
Transmit Upconverter Mixer
1) Remove any RF signal connections made in the
above tests. The V and GND connections should
CC
3) Connect one RF signal generator (with the output
disabled) to the LO SMA connector. Set the fre -
quency to 1.5GHz and the output power to -10dBm.
This is the LO signal.
remain as before. Turn off the V supply. The VGC
CC
voltage source is not needed for this test.
2) Set the RXEN jumper to the “Logic 0” position and
the TXEN jumper to the “Logic 1” position. This
enables the MAX2410’s transmit mode.
4) Connect the other RF signal generator to the RXMXIN
SMA connector (with the output disabled). Set the
fre q ue nc y to 1.9GHz a nd the outp ut p owe r to
-30dBm. This is the RF input signal.
3) Connect one RF signal generator (with the output
disabled) to the LO SMA connector. Set the fre-
quency to 1.5GHz and the output power to -10dBm.
This is the LO signal.
2
_______________________________________________________________________________________
MAX2 4 1 0 Eva lu a t io n Kit
Evluates:MAX2410
4) Connect the other RF signal generator (with the out-
put disabled) to the IFIN SMA connector. Set the
generator to a frequency of 400MHz and a power
level of -32dBm. This is the IF signal.
PA Driver Amplifier
The PA driver amplifier input is internally matched to
50Ω for 1.9GHz operation. Capacitor C11 is necessary
for DC blocking. The gain of the PA driver is adjustable
by applying a voltage on the middle pin of the V
jumper, which is connected through a 1kΩ resistor (R3)
to the GC pin of the MAX2410. C8 and R3 form a filter
GC
5) Connect the TXMXOUT SMA connector to the spec-
trum analyzer. Configure the analyzer for a center
frequency of 1.9GHz, a reference level of 0dBm,
and 200MHz total span.
to reduce any noise from the V
supply. Alternatively,
GC
by inserting a shunt, it is possible to set this voltage to
6) Turn on the DC supply, LO signal generator, and IF
signal generator.
ground or V . The position labeled “Logic 0” is con-
CC
nected to ground, and the “Logic 1” position is set to
7) The supply current should typically read 30mA. The
spectrum analyzer should show a 1.9GHz signal
indicating a conversion gain of typically 10dB after
accounting for cable losses.
V
.
CC
IF Input
The IFIN pin of the MAX2410 is a high-impedance input
that is internally biased. Inductor L11 provides a simple
matching network. C23 is used for DC blocking. As with
the IFOUT pin above, additional component footprints
have been placed to allow further experimentation:
C14, C25, L4, L6, and L7.
8) To observe the remainder of the TX mixer output
spectrum, increase the span on the spectrum ana-
lyzer from 200MHz to 2GHz.
_______________De t a ile d De s c rip t io n
The MAX2410 EV kit circuitry is described in this sec-
tion. For more detailed information about the operation
of the device itself, please consult the MAX2410 data
sheet.
TX Mixer Output
The transmit mixer output appears on the TXMXOUT
pin, which requires a pull-up inductor (L2) to V
as
CC
well as a matching network to a 50Ω load impedance
consisting of inductors L2 and L13. C19 serves as a
DC block.
Re c e ive r
This section describes the LNA and receive mixer sec-
tions of the MAX2410 EV kit.
Lo c a l Os c illa t o r
The MAX2410 EV kit’s LO input only requires a DC
blocking capacitor (C20). No other circuitry is required.
For more information on the LO port, including the
optional use of a differential LO source, consult the
MAX2410 data sheet.
Low-Noise Amplifier
The LNA circuitry consists of two DC blocking capaci-
tors, one at the input (C7) and one at the output (C17).
A s hunt c a p a c itor (C21) is us e d a s a s imp le inp ut
matching network.
________________P o w e r Ma n a g e m e n t
IF Output
The RXEN and TXEN jumpers on the EV kit control the
op e ra ting mod e s of the MAX2410. Re fe r to the
MAX2410 data sheet for a table of operating modes.
Series resistors R1 and R2 and capacitors C5 and C6
are included on the RXEN and TXEN inputs to provide
filtering between logic and RF circuitry.
The IFOUT pin of the MAX2410 is an open-collector
output that is externally biased to V
by inductor L3
CC
and matched with inductors L3 and L12. C24 provides
DC blocking. There are additional component footprints
available on the EV kit layout for designing a more com-
plex matching network: C12, C26, L5, and L9.
______________________________La yo u t
A good PC board is an essential part of an RF circuit
design. The EV kit PC board can serve as a guide for
laying out a board using the MAX2410.
RX Mixer Input
The receive mixer’s input, RXMXIN, requires a simple
matching network. Capacitor C16 provides DC block-
ing, and L8 is used to match the input pin to 50Ω.
Component footprint (C22) is available for additional
matching network prototyping.
Each V
node on the PC board should have its own
CC
decoupling capacitor. This minimizes supply coupling
from one section of the MAX2410 to another. A star
Tra n s m it t e r
This section describes the PA driver and transmit mixer
sections of the MAX2410 EV kit.
topology for the supply layout, in which each V node
CC
on the MAX2410 circuit has a separate connection to a
c e ntra l V
nod e , c a n furthe r minimize c oup ling
CC
between sections of the MAX2410 (Figure 5).
_______________________________________________________________________________________
3
MAX2 4 1 0 Eva lu a t io n Kit
LNAOUT
SMA
L8
3.9nH
RXMXIN
SMA
C17
220pF
27
C22
OPEN
C16
220pF
1
2
3
LNAOUT
28
24
22
26
GND
GND
C7
220pF
LNAIN
SMA
LNAIN
GND
RXMXIN
IFIN
C23
1000pF
C21
1pF
L11
82nH
L4
SHORT
IFIN
SMA
C14
OPEN
C25
OPEN
4
5
GND
GND
GND
L6
OPEN
L7
OPEN
V
CC
25
V
CC
C1
47pF
MAX2410
V
CC
C20
220pF
7
8
LO
SMA
LO
LO
C15
1000pF
A
L3
68nH
L12
68nH
C24
1000pF
V
CC
L5
SHORT
10
21
23
IFOUT
SMA
IFOUT
GND
V
CC
C2
C12
C26
OPEN
12
14
GND
GND
47pF
OPEN
L9
OPEN
V
CC
V
CC
20
C18
GND
1000pF
L2
5.6nH
C9
1000pF
C19
220pF
L13
3.9nH
L1
18nH
19
16
TXMXOUT
SMA
TXMXOUT
PADRIN
13
PADRIN
SMA
PADROUT
SMA
PADROUT
C11
C10
220pF
220pF
RXEN TXEN GC
GND GND GND
15 17 18
V
CC
V
CC
V
CC
6
9
11
LOGIC 1
JU3
JU2
JU1
V
CC
C5
0.1µF
R1
1k
LOGIC 0
V
CC
C3
10µF
C4
0.1µF
V
GC
TXEN RXEN
GND
C6
0.1µF
R2
1k
C8
0.1µF
R3
1k
Figure 1. MAX2410 EV Kit Schematic
_______________________________________________________________________________________
4
MAX2 4 1 0 Eva lu a t io n Kit
Evluates:MAX2410
1.0"
1.0"
Figure 2. MAX2410 EV Kit Component Placement Guide
Figure 3. MAX2410 EV Kit PC Board Layout—Component Side
_______________________________________________________________________________________
5
MAX2 4 1 0 Eva lu a t io n Kit
Evluates:MAX2410
1.0"
1.0"
Figure 4. MAX2410 EV Kit PC Board Layout—Ground Plane
Figure 5. MAX2410 EV Kit PC Board Layout—Solder Side
6
_______________________________________________________________________________________
MAX2 4 1 0 Eva lu a t io n Kit
Evluates:MAX2410
NOTES
_______________________________________________________________________________________
7
MAX2 4 1 0 Eva lu a t io n Kit
NOTES
Evluates:MAX2410
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.
8
_____________________Ma x im In t e g ra t e d P ro d u c t s , 1 2 0 S a n Ga b rie l Drive , S u n n yva le , CA 9 4 0 8 6 4 0 8 -7 3 7 -7 6 0 0
© 1998 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
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