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MC1408-8 Datasheet(PDF) 7 Page - NXP Semiconductors |
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MC1408-8 Datasheet(HTML) 7 Page - NXP Semiconductors |
7 / 10 page Philips Semiconductors Product data MC1408-8 8-bit multiplying D/A converter 2001 Aug 03 7 5 6 7 8 9 10 11 12 3 MC1408 13 14 15 1 2 4 16 51 CO ≤ 25pF R14 0.1 µF RL eIN VEE VCC 15pF 0.1 µF 1.0k 1.0k 0.1 µF eO FOR SETTLING TIME MEASUREMENT (ALL BITS SWITCHED LOW TO HIGH) 2.4V 0.4V 1.0V SETTLING TIME 0 0 TRANSIENT RESPONSE –100 mV FOR TURN OFF MEASUREMENT USE RL to GND 1.4V RL = 50Ω PIN 4 TO GND tS = 70ns TYPICAL TO ±1/2LSB tPLH tPHL tPHL = tPLH = 10ns RL = 500Ω eIN +2VDC SL00054 Figure 7. Transient Response and Settling Time INPUTS 5 6 7 8 9 10 11 12 3 MC1408 13 14 15 1 2 4 16 VEE VCC THE RESISTOR TIED TO PIN 15 IS TO TEMPERATURE COMPENSATE THE BIAS CURRENT AND MAY NOT BE NECESSARY FOR ALL APPLICATIONS VI AND II APPLY TO INPUTS A1 THROUGH A8 I O + K A 1 2 ) A 2 4 ) A 3 8 ) A 4 16 ) A 5 32 ) A 6 64 ) A 7 128 ) A 8 256 where K + V REF R 14 and AN = “1” IF AN IS AT HIGH LEVEL AN = “0” IF AN IS AT LOW LEVEL DIGITAL IEE IO I15 I14 R14 R15 VO OUTPUT RL VI II (+) ICC VREF(+) (SEE TEXT FOR VALUES OF C.) TYPICAL VALUES R14 = R15 = 1k VREF = +2.0V C = 15pF A1 A2 A3 A4 A5 A6 A7 A8 SL00055 Figure 8. Notation Definitions 2.0mA 5 6 7 8 9 10 11 12 3 13 14 15 1 2 4 16 VCC SCOPE RL = 50 VREF MC1408 VEE 15pF 1k 1k SLEWING TIME 10% 90% 0 dI dt + I R L dV dt SL00056 Figure 9. Reference Current Slew Rate Measurement |
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