AD7609BSTZ Analog Devices Inc, AD7609BSTZ Datasheet - Page 29

• Manufacturer Part Number: AD7609BSTZ
• Description: 58T8900
• Manufacturer: Analog Devices Inc

Specifications of AD7609BSTZ

• Resolution (bits): 18bit
• Sampling Rate: 250kSPS
• Input Channel Type: Differential
• Data Interface: Serial, SPI
• Supply Voltage Range - Analog: 4.75V To 5.25V
• Rohs Compliant: Yes

1600
1400
1200
1000
2000
1800
1600
1400
1200
1000
800
600
400
200
800
600
400
200
0
0
–9 –8 –7 –6 –5 –4 –3 –2 –1 0
–7 –6 –5 –4 –3 –2 –1
Figure 48. Histogram Of Codes—OS × 2 (15 Codes)
Figure 47. Histogram of Codes—No OS (19 Codes)
2 10 27
NO OVERSAMPLING
1
12
46
83
CONVST A,
CONVST B
210
214
DB[15:0]
DATA:
BUSY
Figure 46. AD7609—No Oversampling, Oversampling × 4, and Oversampling × 8 Using Read After Conversion
450
599
CS
RD
727
1146
1062
1384 1373
1785 1772
CODE
CODE
0
1167
1389
1 2 3 4 5 6 7 8 9
1
840
788
OVERSAMPLING BY 2
492
2
219
317
3
OS = 0
4µs
100
105
4
9µs
32 11
15
5
t
CONV
19µs
OS = 2
t
2
4
6
2
1
1
7
OS = 4
t
Rev. 0 | Page 29 of 36
4
t
4
t
CYCLE
3000
2500
2000
1500
1000
4000
3500
3000
2500
2000
1500
1000
500
500
0
0
Figure 50. Histogram of Codes—OS × 8 (Eight Codes)
OVERSAMPLING BY 4
Figure 49. Histogram of Codes—OS × 4 (10 Codes)
–5
–4
OVERSAMPLING BY 8
5
1
–4
49
–3
41
341
–3
549
–2
1191
–2
2397
2363 2394
–1
–1
CODE
CODE
3392
0
0
1340
1
1568
1
422
2
229
2
79
3
AD7609
15
3
8
4