SPT7814(1991) Ver la hoja de datos (PDF) - Signal Processing Technologies

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SPT7814
(Rev.:1991)

AN7810/14 EVALUATION BOARD

Signal Processing Technologies 

Clock Circuit Calibration

• Monitor TP7 (w.r.t. DGND TP) with DVM and adjust R20

for 0 V ±50 mV

• Monitor TP6 (w.r.t. DGND TP) with DVM and adjust R21

for -1.3 V ±50 mV

• Set the generator # 2 to 5 MHz and ± 2 Vp-p sinewave

• Set SW1 switch to HS position

• Monitor PJ1 and PJ2 probe jacks with scope and adjust

R20 potentiometer to obtain a 50% duty cycle (approxi-

mately)

• Set the generator # 2 to 500 Hz and ± 2 Vp-p sinewave

• Set SW1 switch to LS position

• Monitor PJ1 and PJ2 probe jacks with scope and adjust

R21 potentiometer to get a clean transition.

HDAC52160 Calibration

• Set CCLK to 1 kHz, ECL logic and connect DVM to DAC

OUT

• Connect VIN to VFT and monitor the DAC OUT signal

with DVM

• Adjust R27 for -2.500 V

• Connect VIN to VFB

• Adjust R26 for +2.4951 V

SPT

AN7810/14

11

12/11/91

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