3
Rev. 0
QUICK START PROCEDURE
Use with SDP-K1 Controller Board
The DEMO kit is supplied with the SDP-K1 controller
board plugged-in directly below the EVAL board. The
SDP-K1, when connected to a PC, using the supplied
USB cable, with an installed serial port terminal program
like Coolterm, allows the user to power the EVAL board
and also to control and save the LTC6563 operating state
and analog control voltages. The only other power supply
needed is the HV (–120V) DC power for APD biasing.
For optical pulse testing, an external laser source is
needed to excite the on-board APDs. The TIA differential
output voltage can then be monitored by driving an ADC
(tied to output SMAs) analog input(s), or by using a dual
channel oscilloscope. With the laser pulses illuminating
the selected APD (one of four), the optical response will
be displayed on the oscilloscope and Coolterm can be
used to manipulate and save (nonvolatile) the LTC6563
operating conditions and control voltages.
The pre-programmed SDP-K1 controller board performs
the following functions:
1. Power the EVAL-LTC6563-TQFN EVAL board. NOTE:
The APD high-voltage bias must be provided separately
through P7.
2. Control the LTC6563 analog control functions (Offset,
HI, CM, and Tilt) using the on-board DAC.
3. Control the I/O States (CHSEL0, CHSEL1, OMUX,
PWRMD (also called SHDN on the board silkscreen
and schematic), ADJ1, ADJ0).
4. Write the values/states of these same functions into
the on-board EEPROM to be retrieved automatically
upon power-up.
5. Store the settings in the EEPROM.
6. Return the device to the default factory state/DAC
values.
Quick Setup with SDP-K1 Controller Board
To allow the operation of EVAL-LTC6563-TQFN using
SDP-K1:
1. Download Coolterm or other similar USB-serial terminal
application program off the web (if not already installed)
using the link shown under the Equipment List.
2. Launch Coolterm.
3. Plug the SDP-K1 onto the bottom of EVAL-LTC6563-
TQFN as shown in Figure 4 (if not already).
4. Go to the Default Factory hardware Settings listed in
Figure 7 (if not already):
a. Move EVAL-LTC6563-TQFN S1 switch to the right
(towards connector P11, see Figure 4) to power
the EVAL board using the SDP-K1 if not already.
Figure 4. SDP-K1 Connection (WARNING: HIGH VOLTAGE PRESENT!)
