Analog Devices Linear Technology LTC6953 Demo Manual page 5

DC2610A RECONFIGURATION
The following covers the hardware reconfiguration of the
DC2610A. Refer to LTC6952Wizard and the LTC6953 data
sheet to better understand how to change programmed
parameters on the DC2610A.
POWER SUPPLY OPTIONS
Table 1 provides the power supply options for DC2610A.
By default the DC2610A is setup to use the single supply
option. However, a dual supply option is available to power
the higher current supply from an LTC Silent Switcher,
such as the LT8609S. The LTC Silent Switcher improves
the power efficiency over the low noise LDO. A low noise
LDO is required on the LTC6953's V
Table 1. Power Supply Options
Power Supply Voltage/Current
(Recommended Supply)
Default Option R4
X Single Installed
Supply
Dual Do Not
Supply Install
INPUT TERMINATION OPTIONS
Table 2 provides the single-ended and differential input
termination options. By default the DC2610A is setup for
a single-ended input on the IN
Table 2: Input Termination Options (*)
Default Termination R26
Ω
–
X SE, IN 75
+
SE, IN 30
DIFF , CML or DNI
PECL
DIFF , LVDS DNI
* SE = Single-Ended, DIFF = Differential, DNI = Do Not Install
+
supply pin.
IN
J30 (3.3V) E23 (VIN33)
3.3V/1.5A NA
(Low Noise LDO)
3.3V/1.5A 3.3V/150mA
(LTC Silent (Low Noise LDO)
Switcher)
–
SMA (J28).
R30 R29 R37 C59
Ω Ω Ω µF
30 DNI DNI 0.1
75 DNI DNI DNI
DNI 160 DNI 0.1
DNI DNI 160 0.1
DEMO MANUAL DC2610A
LTC6953 6952SET FILES
The LTC6952Wizard provides a 6952set file for all
LTC6953 data sheet application examples and typical
application circuits. After loading a 6952set file a pop-up
window will detail any user actions and board modifica-
tions required for the selected file.
SYNC OPTIONS
The LTC6953 data sheet describes several synchroniza-
tion modes. After selecting the desired synchronization
mode, refer to Table 3 to identify the required DC2610A
board modifications. Refer to the LTC6953 data sheet for
SYNC timing and level requirements.
CML OUTPUTS, OUT[10:0]
The DC2610A has 11 CML outputs. Seven of these out-
puts are AC-coupled and brought out to SMAs (OUT10,
OUT9, OUT8, OUT5, OUT4, OUT1, and OUT0). To drive
50Ω impedance instruments connect OUTx
–
ment and OUTx
The remaining four outputs (OUT7, OUT6, OUT3, and
OUT2) are terminated with a 100Ω resistor on board. To
connect these outputs to a 50Ω instrument, remove the
100Ω termination, and install the appropriate SMAs and
AC blocking capacitors.
Refer to LTC6953 data sheet for differential termination
options.
C60
µF
DNI
0.1
0.1
0.1
to a 50Ω termination, or vice versa.
+
to the instru-
dc2610af
5