Linear Technology LTC2263-14 14-Bit, 25Msps, 1.8V Dual Serial ADC, 5MHz DC1532A-F Ficha De Dados

3

dc1532f

DEMO MANUAL DC1532

3.5V TO 6V

+

ANALOG INPUTS

PARALLEL/SERIAL

TO PROVIDED

USB CABLE

TO PROVIDED

POWER SUPPLY

SINGLE-ENDED ENCODE CLOCK

(USE PROVIDED DC1075, DIVIDE

BY 4 CLOCK BOARD)

CHANNEL 1

CHANNEL 2

N

N

Demonstration Circuit 
The DC1371 is used to acquire data from the DC1532, 

the DC1371 must FIRST be connected to a powered USB 

port and have 5V applied power BEFORE applying 3.6V to 

6.0V across the pins marked V

+

 and GND on the DC1532. 

DC1532 requires 3.6V for proper operation.
Regulators on the board produce the voltages required 

for the ADC. The DC1532 demonstration circuit requires 

up to 500mA depending on the sampling rate and the A/D 

converter supplied.
The DC1532 should not be removed, or connected to the 

DC1371 while power is applied.

Analog Input Network
For optimal distortion and noise performance the RC 

network on the analog inputs may need to be optimized 

for different analog input frequencies. For input frequen-

cies above 140MHz, refer to the LTC2268 datasheet for a 

proper input network. Other input networks may be more 

appropriate for input frequencies less that 5MHz.
In almost all cases, filters will be required on both analog 

input and encode clock to provide data sheet SNR.
The filters should be located close to the inputs to avoid 

reflections from impedance discontinuities at the driven 

end of a long transmission line. Most filters do not present 

50Ω outside the passband. In some cases, 3dB to 10dB 

pads may be required to obtain low distortion.