AD7988-1 Analog Devices, AD7988-1 Datasheet - Page 11

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AD7988-1

Manufacturer Part Number
AD7988-1
Description
16-Bit, 100ksps, Ultra Low Power 16-Bit SAR ADC
Manufacturer
Analog Devices
Datasheet

Specifications of AD7988-1

Resolution (bits)
16bit
# Chan
1
Sample Rate
100kSPS
Interface
Ser,SPI
Analog Input Type
Diff-Uni
Ain Range
(Vref) p-p,5V p-p,Uni (Vref),Uni 5.0V
Pkg Type
SOP

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Data Sheet
–0.25
–0.50
–0.75
–1.00
–0.25
–0.50
–0.75
–1.00
Figure 14. Histogram of a DC Input at the Code Center, V
1.00
0.75
0.50
0.25
180k
160k
140k
120k
100k
1.00
0.75
0.50
0.25
80k
60k
40k
20k
0
0
0
Figure 13. Differential Nonlinearity vs. Code, V
0
0
Figure 12. Differential Nonlinearity vs. Code, V
8003 8004 8005 8006 8007 8008 8009 800A 800B 800C 800D 800E 800F
0
0
22
16384
16384
1291
52720
162595
CODE IN HEX
32768
CODE
32768
CODE
42731
852 29
POSITIVE INL: +0.18 LSB
NEGATIVE INL: –0.21 LSB
POSITIVE INL: +0.25 LSB
NEGATIVE INL: –0.22 LSB
49152
49152
2
REF
REF
0
= 2.5 V
= 5 V
0
REF
= 5 V
65536
65536
0
Rev. A | Page 11 of 24
Figure 15. Histogram of a DC Input at the Code Transition, V
100
Figure 17. Histogram of a DC Input at the Code Center, V
95
90
85
80
2.25
60k
50k
40k
30k
20k
10k
60k
50k
40k
30k
20k
10k
SNR
SINAD
ENOB
0
0
Figure 16. SNR, SINAD, and ENOB vs. Reference Voltage
7FFA 7FFB 7FFC 7FFD 7FFE 7FFF 8000 8001 8002 8003 8004 8005 8006
7FFA 7FFB 7FFC 7FFD 7FFE 7FFF 8000 8001 8002 8003 8004 8005 8006
0
0
2.75
0
0
19
1
REFERENCE VOLTAGE (V)
3.25
590
94
2290
7285
18848
37417
CODE IN HEX
CODE IN HEX
3.75
AD7988-1/AD7988-5
50970
53412
45198
31540
4.25
12424
5807
1217
512
4.75
30
11
REF
0
0
REF
5.25
= 2.5 V
= 2.5 V
16
15
14
13
12
0
0

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