Quick Start Procedure - Linear Technology 2429A Demo Manual

DEMO MANUAL DC2429A

Quick start proceDure

SETUP
Follow the steps provided in Figure 2 below. When using
a switching supply in Step 1, it is best to use a shielded
BNC power supply cable with BNC to banana plug adap-
tors in Steps 1, 2, 3 and 6 to avoid coupling between the
input supply and output supplies.
5. (FOR EXTERNAL VCOs)
SELECT CORRECT VCO
VOLTAGE
6. (FOR EXTERNAL VCOs)
CONNECT VARIABLE,
200mA SUPPLY TO
PLL/VCO DEMO BOARD
VCO SUPPLY
2
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LEDs D1 to D4 should illuminate when power is applied in
Step 1. If the LEDs do not illuminate, verify jumpers JP1 to
JP4 are set to the ON position. If D4 does not illuminate,
verify Step 1's input voltage is at least 350mV greater
than the desired voltage on the Variable, 200mA supply.
Figure 2. DC2429A Setup
1. CONNECT 6V TO 20V
SUPPLY. (SHOULD BE
350mV GREATER THAN
THE HIGHER OF 6V OR
THE VARIABLE, 200mA
SUPPLY SETTING IN STEP 5)
2. CONNECT 3.3V, 800mA
SUPPLY TO PLL/VCO
DEMO BOARD 3.3V SUPPLY
3. CONNECT 5V, 200mA
SUPPLY TO PLL/VCO
DEMO BOARD 5V SUPPLY
4. CONNECT REF+ (J7) TO
PLL/VCO DEMO BOARD
3.3V SUPPLY
dc2429af