MAX9424EVKIT [MAXIM]
Evaluation Kit for the MAX9424/MAX9425/MAX9426/MAX9427 ; 评估板MAX9424 / MAX9425 / MAX9426 / MAX9427\n
| 型号： | MAX9424EVKIT |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Evaluation Kit for the MAX9424/MAX9425/MAX9426/MAX9427
|
| 文件： | 总6页 (文件大小：425K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-2473; Rev 0; 5/02
MAX9424 Evaluation Kit
General Description
Features
o Controlled 50Ω Coplanar Impedance Traces
o Output Trace Lengths Matched to < 1mil
The MAX9424 evaluation kit (EV kit) is a fully assembled
and tested surface-mount printed circuit (PC) board.
The EV kit includes the MAX9424, a four-channel low-
skew PECL/LVPECL-to-ECL/LVECL translator. The EV
kit accepts differential PECL/LVPECL input signals and
converts these differential ECL/LVECL signals at an
operating frequency up to 3GHz.
-3
(25.4 x 10 mm)
o Frequency Range
2GHz (min) at Asynchronous Mode
3GHz (min) at Synchronous Mode
The MAX9424 EV kit is a four-layer PC board with 50Ω
controlled-impedance traces. It can also be used to
evaluate the MAX9425/MAX9426/MAX9427 PECL/
LVPECL-to-ECL/LVECL translators with different internal
input and output terminations (Table 3).
o 32-Pin TQFP 5mm x 5mm Package
o Surface-Mount Construction
o Fully Assembled and Tested
Ordering Information
PART
TEMP RANGE
IC PACKAGE
MAX9424EVKIT
0°C to +70°C
32 TQFP 5mm ✕ 5mm
Note: To evaluate the MAX9425EHJ/MAX9426EHJ/MAX9427EHJ,
request a MAX9425EHJ/MAX9426EHJ/MAX9427EHJ free sample
with the MAX9424EVKIT.
Component List
DESIGNATION QTY
DESCRIPTION
49.9Ω 1% resistors (0402)
Not installed, resistor (0402)
DESIGNATION QTY
DESCRIPTION
R1, R2, R5–R8
R3, R4
6
0
10µF 10%, 10V tantalum capacitors
(case B)
AVX TAJB106K010R or
Kemet T494B106010AS
C1, C2, C3
3
R9–R36
28 100Ω 1% resistors (1210), 1/4W
IN0–IN3,
IN0–IN3,
0.1µF 10%, 16V X7R ceramic chip
capacitors (0603)
Taiyo Yuden EMK107BJ104KA or
Murata GRM39X7R104K016A or
equivalent
OUT0–OUT3,
OUT0–OUT3,
CLK, CLK
18 SMA edge-mount connectors
C4–C12
9
MAX9424EHJ
(32-pin TQFP 5mm x 5mm)
U1
1
0.01µF 10%, 16V X7R ceramic
capacitors (0402)
Taiyo Yuden EMK105BJ103KW or
Murata GRM36X7R103K016AD or
equivalent
None
None
None
None
4
1
1
1
Shunts
C13–C21
JU1–JU4
9
4
MAX9424 PC board
MAX9424 EV kit data sheet
MAX9424 data sheet
3-pin headers
Component Suppliers
SUPPLIER
PHONE
FAX
WEBSITE
AVX
843-946-0238
843-626-3123
www.avxcorp.com
Kemet
Murata
864-963-6300
770-436-1300
800-348-2496
864-963-6322
770-436-3030
847-925-0899
www.kemet.com
www.murata.com
www.t-yuden.com
Taiyo Yuden
Note: Please indicate that you are using the MAX9424/MAX9425/MAX9426/MAX9427 when contacting these component suppliers.
________________________________________________________________ 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.
MAX9424 Evaluation Kit
8) Connect a 3.40V power supply to the VBIAS pad.
Connect the supply ground to the GND pad closest
to VBAIS.
Quick Start
The MAX9424 EV kit is a fully assembled and tested
surface-mount board. Follow the steps below to verify
board operation. Do not turn on the power supplies
until all connections are completed.
9) Connect CLK and all unused positive inputs (IN0,
IN2, IN3) to the VBIAS pad.
10) Connect CLK and all unused negative inputs (IN0,
IN2, IN3) to VGG.
Recommended Equipment
• Signal generator (e.g., Agilent 8133A 3GHz pulse
generator)
11) Turn on the power supplies in the following order:
VCC, VGG, VEE, then VBIAS.
• 12GHz (min) bandwidth oscilloscope with internal
50Ω termination (e.g., Tektronix11801C digital sam-
pling oscilloscope with the SD-24 sampling head)
12) Enable the pulse generator and verify the differen-
tial output signal:
a) Frequency = 2GHz
• Three power supplies:
b) V
≥ 400mV
OD
a) One 2.0V 0.001V with 1A current capability
c) Duty cycle = 50%
b) One adjustable -3.50V to -0.375V with 200mA cur-
rent capability
Note: To evaluate other channels, make sure corre-
sponding output termination resistors on the EV kit
board are removed, and the unused outputs are termi-
nated with a 50Ω termination resistor. To eliminate sig-
nal distortion, use matched cables of the same type
and length for both the inputs and outputs. All unused
inputs should be biased.
c) One adjustable 4.375V to 7.50V with 300mA cur-
rent capability
• Additional power supply (for VBAIS): one adjustable
2.50V to 5.00V with 1A current capability
Asynchronous Operation
1) Verify that shunts are across jumpers JU1 (SEL)
and JU3 (EN) pins 1 and 2, and jumpers JU2 (SEL)
and JU4 (EN), pins 2 and 3.
Detailed Description
The MAX9424 EV kit contains an extremely fast, low-
skew quad PECL/LVPECL-to-ECL/LVECL translator.
The EV kit demonstrates ultra-low propagation delay
and channel-to-channel skew, and can be operated
synchronously with an external clock, or in asynchro-
nous mode, depending on the state of the SEL input.
2) Connect two matched coax cables to OUT1 and
OUT1. Connect the other end of the cables to an
oscilloscope.
3) Connect two matched coax cables to IN1 and IN1.
Connect the other end of the cables to a signal
generator that provides differential square waves
with the following settings:
Power Supply
MAX9424–MAX9427 are specified with outputs termi-
nated with 50Ω to V
- 2V. In order to terminate the
CC
a) Frequency = 2GHz
outputs with 50Ω to V
- 2V using the 50Ω oscillo-
CC
b) V = 3.4V, V = 3.2V
IH
IL
scope input termination, VGG is set to 2.000V. An addi-
tional 2.50V to 5.00V power supply is required to bias
all unused positive inputs to a known state. All unused
negative inputs should be connected to VGG. To avoid
damaging the IC, turn on the power supply in the fol-
lowing sequence: VCC, VGG, VEE, then VBIAS. In an
c) Duty cycle = 50%
4) Connect one coax cable to the trigger output of the
signal generator. Connect the other end to the trig-
ger input of the oscilloscope.
5) Connect a 2.000V power supply to the VGG pad.
Connect the supply ground to the GND pad closest
to VGG.
actual application, V , V , and V can have differ-
CC GG
EE
ent supplies (refer to the MAX9424–MAX9427 data
sheet), and VBIAS can be eliminated.
6) Connect a 5.30V power supply to the VCC pad.
Connect the supply ground to the GND pad closest
to VCC.
Enable and Select
The MAX9424 provides pins EN and EN to enable the
outputs, and pins SEL and SEL to select asynchronous
or synchronous operation. The MAX9424 EV kit incor-
porates jumpers JU1–JU4 to drive these pins to either
VBIAS or VGG (see Tables 1 and 2).
7) Connect a -1.30V power supply to the VEE pad.
Connect the supply ground to the GND pad closest
to VEE.
2
_______________________________________________________________________________________
MAX9424 Evaluation Kit
Table 1. Jumpers JU1 and JU2 Functions
JU1
SHUNT
LOCATION
JU2
SHUNT
LOCATION
MAX9424
MAX9424
SEL PIN
MAX9424
OPERATING
SEL PIN
MODE
Asynchronous mode
Synchronous mode
Undefined
1 and 2
2 and 3
Connected to VBIAS
Connected to VGG
2 and 3
Connected to VGG
Connected to VBIAS
1 and 2
All other combinations (not driven externally)
Table 2. Jumpers JU3 and JU4 Functions
JU3
SHUNT
LOCATION
JU4
SHUNT
LOCATION
MAX9424
EN PIN
MAX9424
EN PIN
MAX9424
OUTPUTS
1 and 2
2 and 3
Connected to VBIAS
Connected to VGG
2 and 3
1 and 2
Connected to VGG
Connected to VBIAS
Enabled
Disabled
Undefined
All other combinations (not driven externally)
An external signal can be used to drive any of the EN,
EN, SEL, and SEL control pins by removing the shunt
completely from the appropriate jumpers and connect-
ing the external signal to the appropriate SMA connec-
tor. The MAX9424 EV kit does not provide SMA
connectors for EN, EN, SEL, and SEL. Before connect-
ing external signals to the EN, EN, SEL, and SEL pins,
verify there are no shunts across jumpers JU1–JU4,
and add SMA connectors to the appropriate pads.
• To evaluate the MAX9425, replace the MAX9424EHJ
with a MAX9425EHJ and remove all output termination
resistors R1 to R8. The output is half-amplitude com-
pared to an open output because of the voltage-
divider formed by the on-chip series 50Ω and the 50Ω
oscilloscope input.
• To evaluate the MAX9426, replace the MAX9424EHJ
with a MAX9426EHJ and remove all input termination
resistors R9 to R24.
• To evaluate the MAX9427, replace the MAX9424EHJ
with a MAX9427EHJ and remove all input and output
termination resistors R1 to R24. The output is half-
amplitude compared to an open output because of
the voltage-divider formed by the on-chip series 50Ω
and the 50Ω oscilloscope input.
Evaluating the
MAX9425/MAX9426/MAX9427
The MAX9424 EV kit is a four-layer PC board with 50Ω
controlled-impedance input traces with 50Ω termination
(two parallel 100Ω resistors). All output signal traces
are also 50Ω controlled-impedance traces with 49.9Ω
termination resistors.
The MAX9424 EV kit can be used to evaluate the
MAX9425/MAX9426/MAX9427 after some modifications.
Table 3 shows the on-chip input and output termination
resistor arrangement for each part.
Table 3. On-Chip Input and Output
Termination
INPUT
TERMINATION
RESISTOR
Open
OUTPUT
TERMINATION
RESISTOR
Open
PART
MAX9424
MAX9425
MAX9426
MAX9427
Open
100Ω
100Ω
50Ω
Open
50Ω
_______________________________________________________________________________________
3
MAX9424 Evaluation Kit
OUT0
SMA
OUT0
SMA
R1
49.9Ω
1%
R2
49.9Ω
1%
IN0
IN1
IN1
SMA
SMA
SMA
VEE
R12
100Ω
1%
R11
100Ω
1%
VGG
R13
100Ω
1%
R14
100Ω
1%
C12
0.1µF
C11
0.1µF
IN0
SMA
VBIAS
C21
0.01µF
C20
0.01µF
VBIAS
GND
VCC
R10
100Ω
1%
R9
100Ω
1%
R15
100Ω
1%
R16
100Ω
1%
32
IN0
31
IN0
30
29
28
27
V
26
IN1
25
IN1
VGG
V
OUT0
OUT0
GG
EE
24
23
22
21
20
1
V
V
GG
CC
C1
10µF
10V
C4
0.1µF
C13
0.01µF
C19
C10
0.01µF
0.1µF
GND
VBIAS
SEL
1
2
OUT1
OUT1
JU1
2
3
4
5
6
7
8
SMA
SEL
SEL
CLK
CLK
EN
OUT1
OUT1
SMA
3
R35
R36
R3
OPEN
100Ω
100Ω
VBIAS
1
1%
1%
VGG
SEL
JU2
2
3
SMA
SMA
R33
100Ω
1%
R34
100Ω
1%
R4
OPEN
VGG
CLK
CLK
SMA
SMA
V
V
EE
R31
100Ω
1%
R32
100Ω
1%
U1
MAX9424
VEE
C3
C18
0.01µF
C9
0.1µF
10µF
10V
GND
EE
R29
100Ω
1%
R30
100Ω
1%
VBIAS
1
EN
OUT2
JU3
2
3
19
18
17
SMA
OUT2
OUT2
SMA
R27
100Ω
1%
R28
100Ω
1%
R5
49.9Ω
1%
VBIAS
1
VGG
EN
OUT2
JU4
2
3
SMA
EN
SMA
R25
100Ω
1%
R26
100Ω
1%
R6
49.9Ω
1%
VGG
VGG
GND
V
GG
VCC
V
CC
IN3
C2
C17
C8
0.1µF
IN3
10
V
OUT3
12
OUT3
13
V
EE
IN2
15
IN2
GG
10µF
0.01µF
9
11
14
16
10V
C15
C16
0.01µF
C5
0.1µF
C14
0.01µF
0.01µF
IN3
IN2
VGG
VEE
C6
0.1µF
C7
0.1µF
SMA
SMA
R23
100Ω
1%
R24
100Ω
1%
R17
R18
100Ω
100Ω
1%
1%
OUT3
OUT3
SMA
IN3
IN2
SMA
SMA
SMA
R8
49.9Ω 49.9Ω
1% 1%
R7
R21
R22
100Ω
1%
R19
R20
100Ω
1%
100Ω
100Ω
1%
1%
Figure 1. MAX9424 EV Kit Schematic
4
_______________________________________________________________________________________
MAX9424 Evaluation Kit
Figure 2. MAX9424 EV Kit Component Placement Guide—
Component Side
Figure 3. MAX9424 EV Kit PC Board Layout—Component Side
Figure 4. MAX9424 EV Kit PC Board Layout—Inner Layer 2
(GND Layer)
_______________________________________________________________________________________
5
MAX9424 Evaluation Kit
Figure 5. MAX9424 EV Kit PC Board Layout—Inner Layer 3
(VCC Layer)
Figure 6. MAX9424 EV Kit PC Board Layout—Solder Side
Figure 7. MAX9424 EV Kit Component Placement Guide—
Solder Side
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.
6 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2002 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
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