DAC08ESZ-REEL(RevC) Ver la hoja de datos (PDF) - Analog Devices

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DAC08ESZ-REEL
(Rev.:RevC)

8-Bit, High Speed, Multiplying D/A Converter (Universal Digital Logic Interface)

Analog Devices 

RC damping of the output is difficult to prevent while main-

taining adequate sensitivity. However, the major carry from

01111111 to 10000000 provides an accurate indicator of settling

time. This code change does not require the normal 6.2 time

constants to settle to within ±0.2% of the final value, and thus

settling time is observed at lower values of IREF.

DAC08 switching transients or “glitches” are very low and can

be further reduced by small capacitive loads at the output at a

DAC08

minor sacrifice in settling time. Fastest operation can be

obtained by using short leads, minimizing output capacitance

and load resistor values, and by adequate bypassing at the

supply, reference, and VLC terminals. Supplies do not require

large electrolytic bypass capacitors because the supply current

drain is independent of input logic states; 0.1 µF capacitors at

the supply pins provide full transient protection.

VCL

0.7V

+VREF

0.1µF

VL

FOR TURN-ON, VL = 2.7V

FOR TURN-OFF, VL = 0.7V

1kΩ

MINIMUM

CAPACITANCE

Q1

VIN

1µF

1kΩ

+5V

50µF

1µF

Q2

VOUT 1×

PROBE

RREF

R15

14 5

15

6 7 8 9 10 11 12

4

DAC08

2

13 3 16

0.01µF

IOUT

100kΩ 2kΩ

15kΩ

–15V

+0.4V

0V

0V

–0.4V

0.1µF

0.1µF

+15V –15V

0.1µF

Figure 33. Settling Time Measurement

Rev. C | Page 15 of 20

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