AD5791 datasheet(15/28 Pages) AD

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Data Sheet

AD5781

Rev. D | Page 15 of 28

10.8

10.6

10.4

10.2

10.0

9.8

9.6

9.4

TIME (µs)

±10V VREF

OUTPUT GAIN OF 1

BIAS COMPENSATION MODE

20pF COMPENSATION CAPACITOR

RC LOW-PASS FILTER

Figure 41. 125 Code Step Settling Time

CODE

POSITIVE CODE

CHANGE

NEGATIVE CODE

CHANGE

OUTPUT GAIN OF 1

BIAS COMPENSATION MODE

20pF COMPENSATION CAPACITOR

RC LOW-PASS FILTER

VREF

Figure 42. 6 MSB Segment Glitch Energy for ±10 V VREF

4.0

2.0

1.5

1.0

0.5

2.5

3.0

3.5

CODE

POSITIVE CODE

CHANGE

NEGATIVE CODE

CHANGE

10V VREF

OUTPUT GAIN OF 1

BIAS COMPENSATION MODE

20pF COMPENSATION CAPACITOR

RC LOW-PASS FILTER

Figure 43. 6 MSB Segment Glitch Energy for 10 V VREF

3.0

–0.2

2.2

1.0

1.4

1.8

0.6

0.2

2.6

CODE

NEGATIVE CODE

CHANGE

5V VREF

OUTPUT GAIN OF 1

BIAS COMPENSATION MODE

20pF COMPENSATION CAPACITOR

RC LOW-PASS FILTER

POSITIVE CODE

CHANGE

Figure 44. 6 MSB Segment Glitch Energy for 5 V VREF

–20

–10

–1.0

–0.5

2.0

1.5

1.0

0.5

TIME (µs)

±10V VREF

OUTPUT GAIN OF 1

BIAS COMPENSATION MODE

20pF COMPENSATION CAPACITOR

RC LOW-PASS FILTER

CX = 143pF + 0pF

CX = 143pF + 220pF

CX = 143pF + 470pF

CX = 143pF + 1,000pF

Figure 45. Midscale Peak-to-Peak Glitch for ±10 V

800

600

400

200

–200

–400

–600

TIME (Seconds)

MID-SCALE CODE LOADED

OUTPUT UNBUFFERED

AD8676 REFERENCE BUFFERS

TA = 25°C

VDD = +15V

VSS = –15V

VREFP = +10V

VREFN = –10V

Figure 46. Voltage Output Noise, 0.1 Hz to 10 Hz Bandwidth

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