Datasheet

Data Sheet AD7609
Rev. A | Page 29 of 36
CS
RD
DATA:
DB[15:0]
BUSY
CONVST A,
CONVST B
t
CYCLE
t
CONV
4µs
t
4
t
4
t
4
9µs
19µs
OS = 0 OS = 2 OS = 4
09760-043
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
NUMBER OF OCCURRENCES
09760-044
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
NUMBER OF OCCURRENCES
09760-045
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
NUMBER OF OCCURRENCES
09760-046
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
NUMBER OF OCCURRENCES
09760-047
1
41
549
229
15
1568
3392
2397
Figure 50. Histogram of Codes—OS × 8 (Eight Codes)