MAX9150EVKIT [MAXIM]
Evaluation Kit for the MAX9150 ; 评估板MAX9150\n
| 型号： | MAX9150EVKIT |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Evaluation Kit for the MAX9150
|
| 文件： | 总9页 (文件大小：328K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-1983; Rev 0; 3/01
MAX9150 Evaluation Kit
General Description
Features
ꢀ Two Independent Repeater Circuits
ꢀ Link Testing with LVDS Signals
The MAX9150 evaluation kit (EV kit) is a fully assembled
and tested circuit board that simplifies the evaluation of
the MAX9150 400Mbps, 10-port low-voltage differential
signaling (LVDS) repeater. The MAX9150 accepts an
LVDS signal and repeats it on 10 outputs. Output levels
are LVDS into a double-terminated bus (100Ω at each
end of the differential bus for a total 50Ω load). The EV
kit contains two independent circuits, each with a
MAX9150 repeater, that can be linked using various
media or tested independently. The outputs can be
sampled through SMA connectors or category-5 twist-
ed-wire pair. The two circuits on the EV kit require
+3.3V power supplies to operate.
ꢀ Supports Testing of Various Media
Coax Cable with SMA Connectors
Twisted-Wire Pair
PC Board Trace
ꢀ Independent Supplies Allow Common-Mode
Testing
ꢀ Low-Voltage, Low-Power Operation
ꢀ Fully Assembled and Tested
Component Suppliers
Ordering Information
SUPPLIER
AVX
PHONE
FAX
PART
TEMP. RANGE
IC PACKAGE
803-946-0690
864-963-6300
847-803-6100
803-626-3123
864-963-6521
847-803-6296
MAX9150EVKIT
0°C to +70°C
28 TSSOP
Kemet
TDK
Note: Please indicate that you are using the MAX9150 when
contacting these component suppliers.
Component List
DESIGNATION
QTY
DESCRIPTION
R11–R20, R33,
R35, R36,
15
100Ω 1% resistors (0402)
10µF, 10V tantalum capacitors (B)
AVX TAJB106M010 or
R38, R39
C1, C11
2
Kemet T494B106K010AS
R41, R42, R43
U1, U2
0
2
Not installed (0805)
MAX9150EUI (28-pin TSSOP)
0.1µF, 16V X7R ceramic
capacitors (0603)
TDK C1608X7R1C104KT or
equivalent
INA1, INB1,
INA2, INB2
C2, C5, C6,
C12, C15, C16
4
SMA PC-mount edge connectors
6
OUTA1, OUTB1,
OUTA2, OUTB2
4
2
SMA PC-mount connectors
3-pin headers
0.01µF, 50V X7R ceramic
capacitors (0603)
JU1, JU18
C3, C4, C13,
C14
4
9
TDK C1608X7RH103KT or
equivalent
JU12–JU17,
JU21–JU25
11
2-pin headers
None
None
None
None
4
1
1
1
Shunts (JU1, JU16, JU17, JU18)
MAX9150 PC board
R1, R2, R21,
R22, R31, R32,
R34, R37, R40
49.9Ω 1% resistors (0402)
MAX9150 data sheet
MAX9150 EV kit 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.
MAX9150 Evaluation Kit
Circuit 2 (Top Circuit)
Follow the steps below for circuit 2 operation. Do not
turn on power supplies or enable pulse generator
until all connections are completed:
Recommended Equipment
DC power supplies:
+3.3V 0.3V, 200mA
+3.3V 0.3V, 200mA
•
1) Connect one +3.3V power supply to VCC2. Connect
the ground terminal of this supply to GND2.
•
•
Pulse generator for LVDS signal input
(e.g., HP 8131A)
2) Set the pulse generator to generate an LVDS signal
(this requires a noninverting and an inverting signal
output from the pulse generator). For a nominal
LVDS output, program two complementary single-
ended signals that transition between 1.375V and
1.025V with approximately 1ns transition time.
Transition times should be matched to within
approximately 100ps.
Oscilloscope (e.g., Tektronix 11801C)
Quick Start
The MAX9150 EV kit is a fully assembled and tested
surface-mount board. The EV kit contains two test cir-
cuits. Circuit 1, located on the lower half of the board,
as shipped, is optimized for connection of category-5
cable. Circuit 2, located on the upper half of the board,
is configured for direct probing, category-5, and coax
cable connections.
3) Connect the signal from the pulse generator to the
input of circuit 2 (connect the noninverting signal to
SMA connector INA2 and the inverting signal to
SMA connector INB2).
Circuit 1 (Bottom Circuit)
Follow the steps below for circuit 1 operation. Do not
turn on power supplies or enable pulse generator
until all connections are completed:
4) Set the oscilloscope for LVDS signal input.
5) Connect the oscilloscope to the LVDS output signal
at the following connectors:
1) Connect one +3.3V power supply to VCC1. Con-
nect the ground terminal of this supply to GND1.
a. To evaluate the signal with coax cable, connect
to SMA connectors OUTA1 (noninverting) and
OUTB1 (inverting), or to OUTA2 (noninverting)
and OUTB2 (inverting). Use coax cables with a
characteristic impedance of 50Ω and parallel ter-
minate with a 100Ω resistor at the far end, for a
total load of 50Ω (including the 100Ω termination
at the driver output, R33 or R38).
2) Set the pulse generator to generate an LVDS signal
(this requires a noninverting and an inverting signal
output from the pulse generator). For a nominal
LVDS output, program two complementary single-
ended signals that transition between 1.375V and
1.025V with approximately 1ns transition time.
Transition times should be matched to within 100ps.
b.An oscilloscope probe can be used to confirm
the output signals at JU19 and JU20. For JU19,
pin 2 is the noninverting and pin 1 is the inverting
signal. For JU20, pin 1 is the noninverting and pin
2 is the inverting signal. Pin 3 of JU19 and JU20
is a ground connection.
3) Install a shunt on jumper JU16.
4) Connect the signal from the pulse generator to the
input of circuit 1 (connect the noninverting signal to
SMA connector INA1 and the inverting signal to
SMA connector INB1).
5) Set the oscilloscope for LVDS signal input.
c. To evaluate with a differential probe, connect the
probe across JU13.
6) An oscilloscope probe can be used to confirm the
output signals at JU2–JU11. On connectors
JU2–JU11, pin 1 is the noninverting output and pin
2 is the inverting output. Pin 3 is a ground connec-
tion.
6) Turn on the power supply.
7) Enable the pulse generator.
8) Enable the MAX9150 (U2) by connecting a shunt
across pins 1 and 2 of jumper JU18.
7) Turn on the power supply.
8) Enable the pulse generator.
9) Begin evaluating the output signals.
9) Enable the MAX9150 (U1) by connecting a shunt
across pins 1 and 2 of jumper JU1.
10) Begin evaluating the output signals.
2
_______________________________________________________________________________________
MAX9150 Evaluation Kit
Input Signal
The MAX9150 accepts an LVDS input. The differential
high threshold is +100mV and the differential low thresh-
old is -100mV. The input connectors for circuit 2 are SMA
connectors labeled INA2 (noninverting) and INB2 (invert-
ing). The input connectors for circuit 1 are SMA connec-
tors labeled INA1 (noninverting) and INB1 (inverting).
Detailed Description
The MAX9150 EV kit is a fully assembled and tested cir-
cuit board that simplifies the evaluation of the MAX9150
LVDS repeater. The MAX9150 accepts an LVDS input
and repeats it on 10 output ports at a maximum rate of
400Mbps. The EV kit contains two independent circuits,
each with a MAX9150 repeater. One circuit is located
on the upper portion (circuit 2, Figure 2) and the other
circuit on the lower portion (circuit 1, Figure 1) of the
board. The two circuits can be linked by connecting an
output signal from one circuit to the input of the second
circuit. Individual outputs can be measured through
coax cable with SMA connectors or 100Ω-impedance
twisted-wire pair.
The input signal can be monitored with a differential
signal probe placed across jumpers JU22 and JU25
(circuit 2) or across jumpers JU12 and JU21 (circuit 1).
Placing a shunt on jumper JU24 or JU15 increases the
stability of the differential signal by filtering out com-
mon-mode AC signals.
To monitor a single-ended input signal when operating
circuit 2, place a shunt on JU23 and place a signal
probe across jumper JU22 or jumper JU25. Similarly,
when operating circuit 1, place a shunt on JU14 to
monitor the single-ended input signal at jumper JU12 or
JU21. See Table 1 for jumper settings.
Power Supplies
The MAX9150 EV kit contains two separate circuits with
dedicated power and ground planes that can be operat-
ed independently. Independent power and ground
planes allow measurements of circuit response to ground
shift or other common-mode effects. Each circuit requires
a +3.3V power supply that must be able to supply 200mA
to each circuit. The board can be operated with a single
+3.3V power supply (400mA) when evaluating the board
in driver/receiver mode with a common ground. See the
Driver/Receiver Circuit section.
Output Signal
The MAX9150 accepts one LVDS signal at its input and
repeats it on 10 output ports with LVDS drivers. Each
driver’s output signal is composed of noninverting and
inverting signals. In circuit 2, five drivers can be
accessed through different connectors—four drivers
Table 1. Jumper Settings
JUMPER
STATUS
1 & 2
PIN CONNECTION
EV KIT OPERATION
U1 is enabled.
PWRDN to VCC1.
PWRDN to GND1.
JU1
2 & 3
U1 is disabled.
INA1, INB1, INA2, and INB2 SMA connectors are
terminated to ground with a 49.9Ω resistor.
U1 and U2 inputs are terminated for
single-ended input signals.
Closed
Open
JU14, JU23
U1 and U2 receivers are terminated with
100Ω for an LVDS signal.
None.
INA1, INB1, INA2, and INB2 SMA connectors are
connected to a common-mode bypass network.
Provides common-mode bypass to the
input signal.
Closed
JU15, JU24
JU16
Open
Open
None.
Differential termination only.
VCC not connected.
VCC to VCC1.
U1 is not connected to the power source.
Power is supplied to U1.
Closed
Operable with one power supply (a short
is required at R41 pads to connect the
grounds).
VCC1 and VCC2 power planes are connected
together.
Closed
JU17
JU18
Circuit 1 and circuit 2 require separate
power supplies.
Open
VCC1 and VCC2 power planes are isolated.
1 & 2
2 & 3
PWRDN to VCC2.
PWRDN to GND2.
U2 is enabled.
U2 is disabled.
_______________________________________________________________________________________
3
MAX9150 Evaluation Kit
are terminated with 50Ω resistors, and one driver can
be connected to circuit 1’s receiver. Of the five accessi-
ble drivers, two connect to SMA connectors, two can
connect to shielded twisted-wire pair, and the fifth dri-
ver can be monitored with a differential signal probe.
See Table 2 for the location of output signals, their cor-
responding drivers, and the type of connection
required.
receiver in circuit 1. To bridge the PC board trace con-
nections, solder a short across R42 and R43 pads.
Note: Verify that a shunt is not placed on JU14 when
circuit 1 is receiving an LVDS signal from circuit 2 to
prevent overloading the LVDS driver.
MAX9150 Enable/Disable
The MAX9150 is enabled by applying a logic high to
the PWRDN pin and is disabled by applying a logic
low. On the MAX9150 EV kit, this can be accomplished
by configuring JU18 for circuit 2, or JU1 for circuit 1. To
enable the respective circuit, install a shunt across pins
1 and 2 of the jumper. To disable the circuit, install the
shunt across pins 2 and 3. See Table 1 for jumper set-
tings. The circuits can also be enabled and disabled by
applying a CMOS logic signal to the PWRDN1 pad or
PWRDN2 pad. Note: If a CMOS logic signal is connect-
ed to the PWRDN1 or PWRDN2 pad, verify that shunts
are not installed on the respective jumper.
The 10 drivers of circuit 1 can be accessed at connec-
tors JU2–JU11 with shielded twisted-pair cable. Pin 1 is
the noninverting signal, pin 2 is the inverting signal of
connectors JU2–JU11, and pin 3 can be used to con-
nect the cable’s shield to ground.
Driver/Receiver Circuit
A circuit 2 driver can be used to drive the receiver of
circuit 1. In this mode, the two circuits’ power and
ground planes can be joined to operate the entire
board with a single power supply. Use a 400mA supply
in this joined mode. To join the two power and two
ground planes, install a shunt across jumper JU17 and
solder a short, or low-value (<1Ω) resistor across the
R41 pads.
Terminations and Layout
All signal lines are 50Ω controlled-impedance traces.
All of the differential output signal traces are terminated
with 100Ω resistors, except the output at JU13, which is
terminated with a 50Ω resistor. Each differential output
pair is laid out with equal trace length having a maxi-
mum length difference of 13mils. To minimize noise
interference, the EV kit is a four-layer board. When test-
ing a twisted-wire pair, terminate with a 100Ω resistor at
the far end of the wire.
To drive the receiver of circuit 1, connect a differential
output signal pair (OUTA1/OUTB1, OUTA2/OUTB2,
JU19, or JU20) to the SMA input connectors of circuit 1
(INA1/INB1). See Table 2 to match the noninverting and
inverting outputs and inputs. An alternate way of oper-
ating the board in driver/receiver mode is by bridging
the PC board traces from the driver in circuit 2 to the
Table 2. Circuit 2 Output Signals and Connections
DRIVER
NONINVERTING SIGNAL
INVERTING SIGNAL
CONNECTOR
SMA connector
1
OUTA1
OUTB1
Plated through holes for twisted-
wire pair
2*
3*
Pin 2, JU19
Pin 1, JU20
Pin 1, JU19
Pin 2, JU20
Plated through holes for twisted-
wire pair
4
5
OUTA2
JU13
OUTB2
JU13
SMA connector
Differential signal probe pins
* Pin 3 can be used to connect the shield to ground.
4
_______________________________________________________________________________________
MAX9150 Evaluation Kit
VCC1
VCC2
JU17
VCC
VCC1
GND1
VCC2
GND2
JU16
C1
C11
10µF
10V
10µF
10V
R41
OPEN
JU2
2
1
28
JU6
1
DO2+
DO3+
U1
1
R12
100Ω
1%
R13
100Ω
1%
2
MAX9150
2
3
3
3
27
26
DO2-
DO1+
DO3-
DO4+
JU3
2
JU7
1
1
R11
100Ω
1%
R14
100Ω
1%
2
VCC1
4
5
3
3
25
24
JU1
1
DO1-
DO4-
DO5+
PWRDN1
2
JU6
2
PWRDN
1
3
R15
100Ω
1%
3
6
A
V
SS
JU12
INA1
23
22
DO5-
SMA
JU15
7
R1
49.9Ω
1%
RIN+
V
CC
C4
0.01µF
C5
0.1µF
VCC
8
9
JU14
21
20
RIN-
GND
GND
C6
0.1µF
JU9
1
DO6+
JU21
R2
C2
0.1µF
C3
0.01µF
R16
100Ω
1%
49.9Ω
1%
VCC
2
2
10
11
V
CC
INB1
3
19
18
SMA
DO6-
DO7+
JU10
1
DO10+
B
1
JU4
R20
100Ω
1%
R17
100Ω
1%
2
3
3
12
13
17
16
DO10-
DO9+
DO7-
DO8+
JU5
2
JU11
2
1
1
3
R19
100Ω
1%
R18
100Ω
1%
3
14
15
DO9-
DO8-
Figure 1. MAX9150 EV Kit Schematic (Circuit 1)
_______________________________________________________________________________________
5
MAX9150 Evaluation Kit
OUTA1
1
28
DO2+
DO3+
U2
SMA
R32
R33
JU13
49.9Ω
100Ω
1%
OUTB1
MAX9150
2
3
1%
27
26
DO2-
DO1+
DO3-
DO4+
SMA
R31
R34
49.9Ω
1%
49.9Ω
VCC2
JU18
4
5
1%
25
24
DO1-
DO4-
DO5+
1
PWRDN2
2
PWRDN
R35
100Ω
1%
3
1
3
2
6
V
SS
JU22
INA2
JU19
23
22
DO5-
SMA
JU24
VCC2
7
R21
49.9Ω
1%
RIN+
V
CC
C14
0.01µF
C15
0.1µF
8
9
JU23
21
20
RIN-
GND
GND
C16
0.1µF
JU20
DO6+
JU25
R22
49.9Ω
1%
1
C12
0.1µF
C13
0.01µF
R36
100Ω
1%
VCC2
2
10
11
V
CC
INB2
3
19
18
SMA
DO6-
DO7+
DO10+
R40
49.9Ω
1%
R37
49.9Ω
1%
12
13
17
16
R42
DO10-
DO9+
DO7-
DO8+
SMA
OUTA2
OPEN
A
R39
100Ω
1%
R38
100Ω
1%
R43
OPEN
14
15
DO9-
B
DO8-
SMA
OUTB2
Figure 2. MAX9150 EV Kit Schematic (Circuit 2)
6
_______________________________________________________________________________________
MAX9150 Evaluation Kit
1.0"
1.0"
Figure 4. MAX9150 EV Kit PC Board Layout—Component Side
Figure 3. MAX9150 EV Kit Component Placement Guide—
Component Side
_______________________________________________________________________________________
7
MAX9150 Evaluation Kit
1.0"
1.0"
Figure 6. MAX9150 EV Kit PC Board Layout—Power Planes
Figure 5. MAX9150 EV Kit PC Board Layout—Ground Planes
8
_______________________________________________________________________________________
MAX9150 Evaluation Kit
1.0"
1.0"
Figure 8. MAX9150 EV Kit Component Placement Guide—
Solder Side
Figure 7. MAX9150 EV Kit PC Board Layout—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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 9
© 2001 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
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