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Maxim MAX3296 Instruction Manual

Longwave (common anode) evaluation kit

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19-1643; Rev 1; 6/00
MAX3296 Longwave (Common Anode)
General Description
The MAX3296 longwave (LW) evaluation kit (EV kit) is
an assembled, surface-mount demonstration board that
provides easy optical and electrical evaluation of the
MAX3286 1.25Gbps laser driver or the MAX3296
2.5Gbps laser driver in the common-anode configura-
tion. This kit allows evaluation of the MAX3286/MAX3296
with long-wavelength laser diodes. Long-wavelength
(1310nm and greater) laser diodes are typically pack-
aged with their anode connected to a photodetector's
cathode.
Refer to the MAX3296EVKIT-SW for evaluation of the
MAX3286/MAX3296 with short-wavelength laser diodes
and VCSELs.
DESIGNATION
QTY
C6–C10, C15,
0.01µF ±10%, 10V min, X7R ceramic
C16, C21, C27,
11
capacitors (0402)
C28, C29
0.1µF ±10%, 10V min, X7R ceramic
C17
1
capacitor (0603)
C18
0
Open, user-supplied (0402)*
10µF ±10%, 16V tantalum capacitor
C24
1
AVX TAJC106K016
Open, user-supplied (laser diode and
D2
0
photodiode assembly, see Figure 1)
D4
1
Red LED
Ferrite beads
L3, L6
2
Murata BLM11HA102SG
Ferrite bead (included but not installed)
L5
1
Murata BLM11HA102SG
Ferrite bead
L7
1
Murata BLM11HA601SG
2-pin headers (0.1in centers)
JU6–JU10
5
Digi-Key S1012-36-ND
Test points
J9, J10
2
Digi-Key 5000K-ND
TP5–TP8, TP11,
TP12, TP13,
Test points
10
TP16, TP17,
Digi-Key 5000K-ND
TP18
R1
1
0Ω ±5% resistor (0402)
R6
1
115Ω ±1% resistor (0402)
________________________________________________________________ Maxim Integrated Products
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.
DESCRIPTION
Evaluation Kit
o Drives Common-Anode Lasers
o Includes Socket for Laser Insertion
o LED Fault Indicator
o Evaluates Either MAX3286 or MAX3296 (installed)
o Adjustable Laser Bias Current
o Adjustable Laser Modulation Current
o Adjustable Laser Modulation Current Tempco
o Configured for Electrical Operation, No Laser
Necessary
Ordering Information
PART
TEMP. RANGE
MAX3296EVKIT-LW
0°C to +70°C
MAX3296CGIL
0°C to +70°C
DESIGNATION
QTY
100kΩ variable resistors
R7, R14
2
Bourns or Digi-Key 3296W-104-ND
50kΩ variable resistor
R8
1
Bourns or Digi-Key 3296W-503-ND
R15
1
36Ω ±5% resistor (0603)
R16
1
18Ω ±5% resistor (0402)
R17
1
24.9Ω ±1% (0402)*
R19
1
49.9Ω ±1% resistor (0402)
R26
1
511Ω ±1% resistor (0402)
R27
1
6.8Ω ±5% resistor (0402)
R28
1
1kΩ ±5% resistor (0402)
R29
1
36Ω ±5% resistor (0402)
SMA connectors (edge mount)
J3, J4, J6
3
EFJohnson 142-0701-801 or
Digi-Key J502-ND
Q5
1
Zetex FMMT591A
Q6
1
Zetex FMMT491A
U3**
1
MAX3296CHJ (32-pin TQFP)
MAX3286CHJ (32-pin TQFP, included
U3**
1
but not installed)
U1**
1
MAX3296CGI (28-pin QFN)
MAX3286CGI (28-pin QFN, included
U1**
1
but not installed)
U4
1
MAX4322EUK (5-pin SOT23)
Features
IC PACKAGE
32 TQFP
28 QFN
Component List
DESCRIPTION
1

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Summary of Contents for Maxim MAX3296

  • Page 1 TP16, TP17, Digi-Key 5000K-ND TP18 MAX4322EUK (5-pin SOT23) 0Ω ±5% resistor (0402) 115Ω ±1% resistor (0402) ________________________________________________________________ Maxim Integrated Products 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.
  • Page 2 R17 and C18 add a pole to cancel this zero. The optimal values 13) Attach differential sources to SMA connectors J3 depend upon the laser used. Maxim recommends R17 = 24.9Ω and J4. Each source should have a peak-to-peak and C18 = 2pF as a starting point.
  • Page 3 MAX3296 Longwave (Common Anode) Evaluation Kit turn potentiometer). This sets the regulation point 9) Place jumpers across JU7 (EN), JU8 (EN), and JU9 for the photodiode current to 1.7V / 50kΩ = 34µA. (PORDLY). The resulting laser bias current depends upon the...
  • Page 4 MAX3286. Using a hot plate and a small heating block to localize the heat underneath the part, desolder and remove the MAX3296 (the EV board ships with the MAX3296CGI installed), and replace it with the MAX3286CGI (included with the EV kit). No other circuit modifications are necessary.
  • Page 5 MAX3296 Longwave (Common Anode) Evaluation Kit Figure 2. MAX3296 LW EV Kit Schematic _______________________________________________________________________________________...
  • Page 6 MAX3296 Longwave (Common Anode) Evaluation Kit 1.0" Figure 3. MAX3296 LW EV Kit Component Placement Guide— Top Silkscreen 1.0" 1.0" Figure 4. MAX3296 LW EV Kit PC Board Layout—Component Figure 5. MAX3296 LW EV Kit PC Board Layout—Ground Side Plane...
  • Page 7 MAX3296 Longwave (Common Anode) Evaluation Kit 1.0" 1.0" Figure 7. MAX3296 LW EV Kit PC Board Layout—Solder Side Figure 6. MAX3296 LW EV Kit PC Board Layout—Power Plane _______________________________________________________________________________________...
  • Page 8 MAX3296 Longwave (Common Anode) Evaluation Kit Figure 8. MAX3296CGI LW EV KIT Schematic _______________________________________________________________________________________...
  • Page 9 MAX3296 Longwave (Common Anode) Evaluation Kit 1.0" Figure 9. MAX3296CGI LW EV Kit Component Placement Guide—Top Silkscreen 1.0" 1.0" Figure 10. MAX3296CGI LW EV Kit PC Board Layout— Figure 11. MAX3296CGI LW EV Kit PC Board Layout—Ground Component Side Plane...
  • Page 10 Side Maxim makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Maxim assume any lia- bility arising out of the application or use of any product or circuit and specifically disclaims any and all liability, including without limitation consequential or incidental damages.