Transcript
19-1427; Rev 0; 1/99
MAX3690 Evaluation Kit
The MAX3690 evaluation kit (EV kit) is an assembled surface-mount demonstration board that provides easy evaluation of the MAX3690 622Mbps serializer with TTL input, clock synthesis, and differential PECL output.
Component List DESIGNATION QTY C4–C12, C16–C21 C13, C22
DESCRIPTION
15
0.1µF, 25V min, 10% ceramic capacitors (0603)
2
1µF, 10V min, 10% ceramic capacitors (0805) X7R
C14
1
1µF, 25V min, 10% ceramic capacitor (0805)
C15*
1
33µF ±10%, 10V min tantalum cap AVX TAJD336K010
C2, C3, R2, R11, JU1, JU2, JU4
0
Do not install
L1–L5*
5
56nH inductors Coilcraft 0805CS-560XKBC
R3, R4
2
27Ω, 5% resistors (0603)
R5, R6
2
220Ω, 5% resistors (0603)
R7, R8
2
130Ω, 5% resistors (0603)
R9, R10
2
24Ω, 5% resistors (0603)
R12
1
20kΩ, 5% resistor (0603)
PCLKI, PD0–PD7, PCLKO
10
SMB connectors (PC mount) Suhner 82 SMB-50-0-1/111
RCLK, SD+, SD-
3
SMA connectors (PC mount) E.F. Johnson 142-0701-206 or Digi-Key J495-ND
VCC, GND
2
Test points Mouser 151-203
JU3
1
2x2 pin header (0.1" centers) Digi-Key S2012-36-ND
None
1
Shunt Digi-Key S9000-ND
U1*
1
MAX3690ECJ (32 TQFP)
None
1
MAX3690 EV kit circuit board, Rev. B
None
1
MAX3690 data sheet*
* Supplied by Maxim.
____________________________Features ♦ +3.3V Single Supply ♦ 77.76MHz Overhead Generation Clock Reference Frequency ♦ Selectable Input Clock Reference Frequencies 77.76MHz 51.84MHz 38.88MHz ♦ Fully Assembled and Tested Surface-Mount Board
Ordering Information PART MAX3690EVKIT
TEMP. RANGE -40°C to +85°C
IC PACKAGE 32 TQFP
Component Suppliers PHONE
FAX
Coilcraft
SUPPLIER
847-639-6400
847-639-1469
Sprague
603-224-1961
603-224-1430
Note: Please indicate that you are using the MAX3690 when contacting these component suppliers.
Detailed Description The MAX3690 EV kit simplifies evaluation of the MAX3690ECJ. The EV kit operates from a single +3.3V supply and includes all the external components necessary to interface with TTL inputs and 3.3V PECL outputs.
PD_, PCLKI These TTL inputs are high impedance, with a range of 0 to VCC (+3.3V) with respect to ground. All input signal lines are of equal length to minimize propagation-delay skew.
RCLK See Table 1 for changing reference clock rates. In normal operation with a high-impedance TTL reference source, RCLK should be driven like PCLKI with R2 open and C2 shorted. If RCLK is driven by a 50Ω TTL source, R2 should be 50Ω, JU1 should be shorted, and C2 should be shorted. If a non-TTL source is used for RCLK, C2 = 0.1µF (ensure trace under C2 is cut) and V CC / 2 should be applied to the stub on the nonground side of JU1. Important: Note that the output of the reference clock generator must swing at least 1.2V peak to peak.
PCLKO PCLKO is designed to drive a high-impedance TTL input. To drive other I/O standards, a converter on this output is recommended. The PCLKO output is sensitive to capacitance loading (see MAX3690 data sheet for specified capacitance loading).
________________________________________________________________ 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.
Evaluates: MAX3690
General Description
SD+, SD-
Table 1. Jumper JU3 Functions
The PECL outputs have an attenuation and impedance matching network on the EV board that allows 50Ω terminations to ground for oscilloscope interfacing. All signal inputs and outputs use coupled 50Ω transmission lines. All output signal lines are of equal length.
SHUNT LOCATION
REFERENCE CLOCK FREQUENCY
1–2*
51.84
Connected to a 20kΩ termination to GND
3–4*
38.88
Connected to GND
Open
77.76
Floating
CKSET PIN
* Pins 1 and 2 are the top two pins. JU2
C22 1µF
+3.3V
JU3
C12 0.1µF
R12 20k
VCCVCO C11 0.1µF
VCCPLL
R11 OPEN
JU4 VCCPLL
25
JU1
26
R2 OPEN
27
RCLK
17
C7 0.1µF
GND
GND
18
GND
CKSET
VCC
FIL-
19
VCC
GND
SD+
RCLK
SD-
31 32
PCLKI
PCLKO
GND
PCLKO
GND
GND
J5
1
PD0
2
3
4
5
6
7
PD7
C5 0.1µF
VCC
VCC
PD6
30 PCLKI
MAX3690
PD5
29
VCCDIG J3
VCC
VCC
PD4
28
VCCPLL
8
C21 0.1µF +3.3V
R7 130Ω
R6 220Ω
C8 0.1µF
15
R4 27Ω
14 13 12
VCCECL VCCLVDS
+3.3V J15
11 10
C6 0.1µF
R10 R8 24Ω 130Ω
JU11 L1
56nH
R6 220Ω
C9 0.1µF
PCLKO
9
J11 PD7
J12 PD6
VCCVCO
C16 0.1µF JU12 L2
56nH C17 0.1µF
JU13 L3
J17 +3.3V C15 33µF J18
56nH C18 0.1µF
C14 1µF JU14 L4
GND
56nH
VCCPLL J7
J9 PD5
PD2 VCCDIG J8 PD3
J10 PD4
VCCECL
C19 0.1µF JU15 L5
56nH
VCCLVDS
C20 0.1µF
Figure 1. MAX3690 EV Kit Schematic 2
J14 SD-
J6 PD1
J13 SD+
16
U1
PD3
C2 SHORT
20
GND
PD2
J2
C4 0.1µF
21
PD1
C3 0.1µF
22 FIL+
23
GND
24
R3 27Ω
R9 24Ω
C10 0.1µF
C13 1µF
PD0
Evaluates: MAX3690
MAX3690 Evaluation Kit
_______________________________________________________________________________________
MAX3690 Evaluation Kit Evaluates: MAX3690
1.0"
1.0"
Figure 2. MAX3690 EV Kit PC Board Layout—Component Side
Figure 3. MAX3690 EV Kit PC Board Layout—Solder Side
1.0" 1.0"
1.0" 1.0"
Figure 4. MAX3690 EV Kit PC Board Layout—Power Plane
Figure 5. MAX3690 EV Kit PC Board Layout—Ground Plane
_______________________________________________________________________________________
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Evaluates: MAX3690
MAX3690 Evaluation Kit
1.0"
Figure 6. MAX3690 EV Kit PC Board Layout—Silk Screen
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.
4 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 1999 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
