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TLC7528INE4 Datasheet(PDF) 11 Page - Texas Instruments |
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TLC7528INE4 Datasheet(HTML) 11 Page - Texas Instruments |
11 / 27 page TLC7528C, TLC7528E, TLC7528I DUAL 8BIT MULTIPLYING DIGITALTOANALOG CONVERTERS SLAS062E − JANUARY 1987 − REVISED NOVEMBER 2008 11 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 APPLICATION INFORMATION REFB 19 RFBB OUTB AGND TLC7528 REFA DB0 − DB7 CS WR DACA / DACB DGND Vref Data Inputs 4 5 18 6 16 15 14 − 7 Test Input 0 to −Vref RFBA 3 VDD 17 OUTA 2 1 20 PASS / FAIL Output 1 k Ω VCC DACB DACA 8 Figure 8. Digitally-Programmable Window Comparator (Upper- and Lower-Limit Tester) digitally-controlled signal attenuator Figure 9 shows a TLC7528 configured as a two-channel programmable attenuator. Applications include stereo audio and telephone signal level control. Table 3 shows input codes vs attenuation for a 0dB to 15.5dB range. Output A1 A2 VOB VDD TLC7528 DGND AGND REFB DACA / DACB WR CS DB0 − DB7 OUTA RFBA REFA RFBB OUTB Data Bus 3 2 15 16 6 18 1 5 19 17 4 20 DACA DACB Attenuation dB = − 20 log10 D/256, D = digital input code 8 14 − 7 VIA Figure 9. Digitally Controlled Dual Telephone Attenuator |
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