Data Sheet

AD7609

Rev. A | Page 29 of 36

CS

RD

DATA:

DB[15:0]

BUSY

CONVST A,

CONVST B

4µs

9µs

19µs

OS = 0

OS = 2

OS = 4

Figure 46. AD7609—No Oversampling, Oversampling × 4, and Oversampling × 8 Using Read After Conversion

0

200

400

600

800

1000

1200

1400

1600

–9 –8 –7 –6 –5 –4 –3 –2 –1

0

CODE

1

2

3

4

5

6

7

8

9

NO OVERSAMPLING

2

10 27

83

210

450

727

1062

1384 1373

1167

840

492

219

100

32 11 2 1

Figure 47. Histogram of Codes—No OS (19 Codes)

0

200

400

600

800

1000

1400

1800

1200

1600

2000

–7

–6

–5

–4 –3 –2 –1

0

CODE

1

2

3

4

5

6

7

OVERSAMPLING BY 2

1

12

46

214

599

1146

1785 1772

1389

788

317

105

15

2

1

Figure 48. Histogram Of Codes—OS × 2 (15 Codes)

500

0

1000

1500

2500

2000

3000

–5

–4

–3

–2

–1

0

CODE

1

2

3

4

OVERSAMPLING BY 4

5

49

341

1191

2363 2394

1340

422

79

8

Figure 49. Histogram of Codes—OS × 4 (10 Codes)

0

500

1000

1500

2000

2500

3000

4000

3500

–4

–3

–2

–1

0

CODE

1

2

3

OVERSAMPLING BY 8

1

41

549

229

15

1568

3392

2397

Figure 50. Histogram of Codes—OS × 8 (Eight Codes)