19-1622; Rev 0; 1/00
MAX3665 Evaluation Kit
General Description
Features
ꢀ Fully Assembled and Tested
The MAX3665 evaluation kit (EV kit) simplifies evalua-
tion of the MAX3665 transimpedance preamplifier. The
EV kit includes a circuit that emulates the zero-to-peak
current input signal that would be produced by a pho-
todiode. It also includes a calibration circuit that allows
accurate bandwidth measurements.
ꢀ Includes Photodiode Emulation Circuit
ꢀ Calibration Circuit for Accurate Bandwidth
Measurements
The MAX3665 EV kit is fully assembled and tested.
Ordering Information
PART
TEMP. RANGE
IC PACKAGE
MAX3665EVKIT
-40°C to +85°C
8 µMAX
Component List
DESCRIPTION
Component Suppliers
DESIGNATION QTY
SUPPLIER
PHONE
FAX
C1, C2, C4, C7,
1000pF 10ꢀ, 25V min ceramic
capacitors
6
C10, C11
AVX
843-444-2863
843-626-3123
C3, C5, C6,
8
Central
Semiconductor
0.1µF 10ꢀ, 10V min ceramic caps
516-435-1110
516-435-1824
C12–C16
33µF 10ꢀ, 16V min tantalum caps
AVX TAJC336K016
Murata
Zetex
770-684-7821
516-543-7100
–
C8, C9
2
516-864-7630
C17, C20, C23
C18, C19, C21
J1–J5
3
3
5
4
2
5pF 0.1pF, 50V capacitors
4pF 0.1pF, 50V capacitors
SMA connectors (edge mount)
Open
Note: Please indicate that you are using the MAX3665 when
contacting these component suppliers.
J11–J14
Quick Start
JU1, JU2
2-pin headers (0.1in centers)
1) Connect a signal source to INPUT. Set the signal
amplitude to 50mVp-p (this may require some attenu-
ation between the source and the MAX3665 EV kit).
The signal should have a data rate up to 622Mbps.
Ferrite beads
Murata BLM11HA601S
L1, L2
2
L3–L8
6
2
22nH 5ꢀ inductors
2) Connect OUT+ and OUT- to the 50Ω inputs of a
R1, R9
2kΩ 1ꢀ resistors
high-speed oscilloscope.
R2, R4, R10,
R12
4
1kΩ 1ꢀ resistors
3) Remove shunts from jumpers JU1 and JU2.
4) Connect a +3.3V or +5.0V supply to the VCC termi-
nal and ground to the GND terminal.
R3, R11
R5
2
1
2
1
1
1
1
0
49.9Ω 5ꢀ resistors
1kΩ potentiometer
5) The differential signal at the oscilloscope should be
between 100mVp-p and 150mVp-p.
R6, R8
R7
10kΩ 5ꢀ resistors
10kΩ potentiometer
U1
MAX3665EUA (8-pin µMAX)
CMPT3906 PNP transistor
MAX400CSA (8-pin SO)
User-supplied optical modules
Detailed Description
U2
The MAX3665 is designed to accept a DC-coupled
input from a photodiode with an amplitude up to 450µA
peak-to-peak. Because the MAX3665 provides a DC
bias for the photodiode, it cannot be DC-coupled to sig-
nal sources. To allow characterization without a photodi-
ode, the MAX3665 EV kit provides a simple circuit that
emulates a photodiode using common voltage output
signal sources.
U3
U4, U5
VCC, +15V,
GND
3
2
1
1
Test points
None
None
None
Shunts for JU1, JU2
MAX3665 evaluation kit (rev B)
circuit board
MAX3665 data sheet
________________________________________________________________ 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.