AD7693 Analog Devices, AD7693 Datasheet - Page 9

• Manufacturer Part Number: AD7693
• Manufacturer: Analog Devices

Specifications of AD7693

• Resolution (bits): 16bit
• # Chan: 1
• Sample Rate: 500kSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni
• Ain Range: (2Vref) p-p,Bip (Vref) x 2
• Adc Architecture: SAR
• Pkg Type: CSP,SOP

TYPICAL PERFORMANCE CHARACTERISTICS
VDD = 4.5 V to 5.5 V, VIO = 2.3 V to VDD, V
300000
250000
200000
150000
100000
–100
–120
–140
–160
–0.2
–0.4
–0.6
–0.8
–180
–1.0
50000
0.8
0.6
0.4
0.2
–20
–40
–60
–80
1.0
0
0
0
0
0
Figure 8. Histogram of a DC Input at the Code Center
20
0
6
Figure 7. Integral Nonlinearity vs. Code
40
16384
0
7
60
Figure 9. FFT Plot
1905
FREQUENCY (kHz)
8
80
CODE IN HEX
32768
CODE
100
258774
POSITIVE INL = +0.17LSB
NEGATIVE INL = –0.17LSB
9
120
441
A
140
49152
f
f
SNR = 96.4dB
THD = –121dB
SFDR = 124dB
SINAD = 96.4dB
S
IN
REF
= 500kSPS
160
= 0.95kHz
0
B
= VDD, T
180
65536
C
0
2
00
A
Rev. A | Page 9 of 24
= 25C.
100
99
98
97
96
95
94
93
92
91
90
–0.2
–0.4
–0.6
–0.8
160000
140000
120000
100000
–1.0
–10
0.8
0.6
0.4
0.2
80000
60000
40000
20000
1.0
0
Figure 11. Histogram of a DC Input at the Code Transition
0
0
Figure 10. Differential Nonlinearity vs. Code
0
7
–8
Figure 12. SNR, THD vs. Input Level
16384
0
8
INPUT LEVEL (dB)
–6
126066
9
SNR
THD
CODE IN HEX
CODE
32768
135054
POSITIVE DNL = +0.22LSB
NEGATIVE DNL = –0.22LSB
A
–4
B
0
49152
–2
C
0
AD7693
0
65536
D
0
–80
–85
–90
–95
–100
–105
–110
–115
–120
–125
–130