AD5678 datasheet(16/28 Pages) AD

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AD5678

Rev. A | Page 16 of 28

SAMPLE

2.505

2.485

512

128

192

256

320

384

448

VDD = 5V

VREFOUT = 2.5V

TA = 25°C

4ns/SAMPLE NUMBER

GLITCH IMPULSE = 3.55nV-s

1 LSB CHANGE AROUND

MIDSCALE (0x8000 TO 0x7FFF)

2.486

2.487

2.488

2.489

2.490

2.491

2.492

2.493

2.494

2.495

2.496

2.497

2.498

2.499

2.500

2.501

2.502

2.503

2.504

Figure 34. Digital-to-Analog Glitch Impulse (Negative)

SAMPLE

2.5000

2.4950

512

2.4955

2.4960

2.4965

2.4970

2.4975

2.4980

2.4985

2.4990

2.4995

128

192

256

320

384

448

VDD = 5V

VREFOUT = 2.5V

TA = 25°C

4ns/SAMPLE NUMBER

Figure 35. Analog Crosstalk

SAMPLE

2.4900

2.4855

512

128

192

256

320

384

448

2.4860

2.4865

2.4870

2.4875

2.4880

2.4885

2.4890

2.4895

VDD = 5V

VREFOUT = 2.5V

TA = 25°C

4ns/SAMPLE NUMBER

Figure 36. DAC-to-DAC Crosstalk

Y AXIS = 2

μV/DIV

X AXIS = 4s/DIV

VDD = VREF = 5V

TA = 25°C

DAC LOADED WITH MIDSCALE

Figure 37. 0.1 Hz to 10 Hz Output Noise Plot, External Reference

5s/DIV

VDD = 5V

VREFOUT = 2.5V

TA = 25°C

DAC LOADED WITH MIDSCALE

Figure 38. 0.1 Hz to 10 Hz Output Noise Plot, Internal Reference

4s/DIV

VDD = 3V

VREFOUT = 1.25V

TA = 25°C

DAC LOADED WITH MIDSCALE

Figure 39. 0.1 Hz to 10 Hz Output Noise Plot, Internal Reference

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