AD7694 Analog Devices, AD7694 Datasheet - Page 9

• Manufacturer Part Number: AD7694
• Manufacturer: Analog Devices

Specifications of AD7694

• Resolution (bits): 16bit
• # Chan: 1
• Sample Rate: 250kSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni
• Ain Range: (Vref) p-p,Uni (Vref)
• Adc Architecture: SAR
• Pkg Type: SOP

TYPICAL PERFORMANCE CHARACTERISTICS
12000
10000
8000
6000
4000
2000
–100
–120
–140
–160
–180
–20
–40
–60
–80
–1
–2
–3
–4
4
3
2
1
0
0
0
0
0
Figure 6. Histogram of a DC Input at the Code Center
24E0 24E1 24E2 24E3 24E4 24E5 24E6 24E7 24E8
0
Figure 5. Integral Nonlinearity vs. Code
20
0
16384
1
Figure 7. FFT Plot
40
10003
FREQUENCY (kHz)
CODE IN HEX
108568
CODE
32768
60
POSITIVE INL = +0.68 LSB
NEGATIVE INL = –1.14 LSB
12500
80
16384 POINT FFT
VDD = REF = 5V
f
f
SNR = 92.5dB
THD = –109.9dB
SFDR = –111.0dB
S
IN
49152
= 250kSPS
0
= 20.43kHz
VDD = REF = 5V
100
0
120
0
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8000
7000
6000
5000
4000
3000
2000
1000
–100
–120
–140
–160
–180
–0.5
–1.0
–1.5
–2.0
–20
–40
–60
–80
2.0
1.5
1.0
0.5
0
0
0
0
0
Figure 9. Histogram of a DC Input at the Code Center
251B 251C 251D 251E 251F 2520 2521 2522 2523 2524 2525 2526
0
Figure 8. Differential Nonlinearity vs. Code
10
0
27
16384
20
2133
Figure 10. FFT Plot
28148
FREQUENCY (kHz)
30
CODE IN HEX
65487
CODE
32768
32418
40
POSITIVE DNL = +0.59 LSB
NEGATIVE DNL = –0.56 LSB
2808
50
16384 POINT FFT
VDD = REF = 2.5V
f
f
SNR = 88.5dB
THD = –102.7dB
SFDR = –105.1dB
S
IN
VDD = REF = 2.5V
50
49152
= 150kSPS
= 20.43kHz
60
1
0
AD7694
70
0
65536