AD7654 Analog Devices, AD7654 Datasheet - Page 12

• Manufacturer Part Number: AD7654
• Manufacturer: Analog Devices

Specifications of AD7654

• Resolution (bits): 16bit
• # Chan: 4
• Sample Rate: 500kSPS
• Interface: Par,Ser,SPI
• Analog Input Type: SE-Uni
• Ain Range: Uni (Vref) x 2,Uni 5.0V
• Adc Architecture: SAR
• Pkg Type: CSP,QFP

AD7654
TYPICAL PERFORMANCE CHARACTERISTICS
–100
8000
7000
6000
5000
4000
3000
2000
1000
–120
–140
–160
–20
–40
–60
–80
Figure 6. Histogram of 16,384 Conversions of a DC Input at the
–1
–2
–3
–4
–5
0
5
4
3
2
1
0
0
0
0
7FBF
0
25
7FC0
Figure 5. Integral Nonlinearity vs. Code
0
50
16384
7FC1
14
75
7FC2
953
Figure 7. FFT Plot
Code Transition
FREQUENCY (kHz)
100
CODE IN HEX
7FC3
7288
32768
CODE
125
7220
7FC4
150
7FC5
903
8192 POINT FFT
f
f
SNR = 89.9dB
SINAD = 89.4dB
THD = –99.3dB
S
IN
175
= 500kHz
= 100kHz, –0.5dB
49152
7FC6
6
200
7FC7
0
225
7FC8
0
65535
250
Rev. B | Page 12 of 28
10000
9000
8000
7000
6000
5000
4000
3000
2000
1000
Figure 9. Histogram of 16,384 Conversions of a DC Input at the
96
93
90
87
84
–1
–2
–3
3
2
1
0
0
–55
0
7FBF
0
–35
Figure 8. Differential Nonlinearity vs. Code
7FC0
0
Figure 10. SNR, THD vs. Temperature
–15
16384
7FC1 7FC2 7FC3
176
5
TEMPERATURE (°C)
3411
Code Center
CODE IN HEX
25
32768
CODE
9366
45
7FC4 7FC5
3299
SNR
THD
65
132
49152
85
7FC6 7FC7
0
105
0
65535
125
–98
–100
–102
–104
–106