MAX3663EVKIT Maxim Integrated, MAX3663EVKIT Datasheet - Page 2

• Manufacturer Part Number: MAX3663EVKIT
• Description: Power Management IC Development Tools
• Manufacturer: Maxim Integrated
• Series: MAX3663r

In the electrical configuration, an APC test circuit is
included to emulate a semiconductor laser with a moni-
tor photodiode. Monitor diode current is provided by Q1,
which is controlled by an operational amplifier (U2). The
APC test circuit, consisting of U2 and Q1, applies the
simulated monitor diode current to the MAX3663’s MD
pin. The ratio of I
proper operation in the electrical configuration, set up
the evaluation board as follows:
1) Verify that inductor L2 is not installed.
2) Shunt JU4 to ground to enable the output.
Note: When performing the following resistance
checks, manually set the ohmmeter to a high range to
avoid forward biasing the on-chip ESD protection
diodes.
3) Shunt JU2 to R14. Adjust R14, the MOD (R
4) Shunt JU1 to R15. Adjust R15, the BIAS (R
5) Shunt JU3 to R16. Adjust R16, the APC (R
6) Power up the board with a +3.3V supply.
7) Apply a differential input signal (max amplitude
MAX3663 Evaluation Kit
2
DESIGNATION
potentiometer, for 10kΩ resistance between pins 2
and 3 (test point 5 and ground).
potentiometer, for 10kΩ resistance between pins 2
and 3 (test point 4 and ground).
potentiometer, for 10kΩ resistance between pins 2
and 3 (test point 6 and ground).
≤800mV per side) to J1 and J2 (DATA+ and DATA-).
_______________________________________________________________________________________
R13
R19
R20
R22
R23
D3
R5
J3
L2
Component Modifications
for Optical Configuration
BIAS
QTY
1
1
1
1
1
1
1
1
1
/ I
User-supplied laser diode
Remove
Ferrite bead
Murata BLM18HG601SN1
Remove
Remove
20Ω ±5% resistor (0402)
5Ω ±5% resistor (0402)
Remove
Remove
Electrical Setup (Default)
MD
is R24 / R23 = 100. To ensure
DESCRIPTION
Quick Start
BIASMAX
MODSET
APCSET
)
)
)
8) Attach a high-speed oscilloscope with 50Ω inputs
9) Adjust R
10) Adjust R
Note: See the Adjustment and Control Descriptions table.
For optical operation, the electrical APC test circuit
must be disabled. For optical evaluation of the MAX3663,
configure the EV kit as described in the Component
Modifications for Optical Configuration table:
1) Shunt JU4 to ground to enable the output.
2) Connect a TO-style header laser and monitor diode
Note: When performing resistance checks, manually
set the ohmmeter to a high range to avoid forward bias-
ing the on-chip ESD protection diodes.
3) Shunt JU2 to R14. Adjust R14, the MOD (R
4) Shunt JU1 to R15. Adjust R15, the BIAS (R
5) Shunt JU3 to R16. Adjust R16, the APC (R
6) Power up the board with a +3.3V supply.
7) Apply a differential input signal (≤800mV per side)
8) Attach the laser-diode output to an optical/electrical
to J3.
desired laser bias current is achieved (refer to the
note in the Applications Information section of the
MAX3663 data sheet).
lation current is achieved.
(Figure 1) as follows:
• Keeping the leads to the laser diode as short as
• Connect the monitor diode on the underside of the
potentiometer, for maximum resistance between
pins 2 and 3 (test point 5 and ground).
potentiometer, for maximum resistance between
pins 2 and 3 (test point 4 and ground).
potentiometer, for desired optical power. (Refer to
the Design Procedure section of the MAX3663 data
sheet.)
to J1 and J2 (DATA+ and DATA-).
converter.
possible, connect the laser diode on the compo-
nent side of the board between R20 and V
with the cathode connected to R20 and the
anode connected to V
the board with the anode connected to the
MAX3663’s MD pin and the cathode connected
to V
CC
MODSET
BIASMAX
.
(R14) until the desired laser-modu-
(R15) and R
CC
.
APCSET
Optical Setup
(R16) until the
BIASMAX
MODSET
APCSET
CC
)
)
)