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AD7091R-5 Datasheet(PDF) 10 Page - Analog Devices

Part # AD7091R-5
Description  4-Channel, I2C, Ultralow Power, 12-Bit ADC in 20-Lead LFCSP/TSSOP
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7091R-5 Datasheet(HTML) 10 Page - Analog Devices

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AD7091R-5
Data Sheet
Rev. 0 | Page 10 of 34
0
–160
–140
–120
–100
–80
–60
–40
–20
FREQUENCY (Hz)
0
10000
8000
6000
4000
2000
VDD = VDRIVE = 3.3V
VREF = 2.5V EXTERNAL
TA = 25°C
fIN = 1kHz
fSAMPLE = 22.2kSPS
fSCL = 400kHz
SNR = 68.3dB
SINAD = 68.2dB
THD = –85.3dB
SFDR = –88.2dB
Figure 11. 10 kHz FFT, VDD = 3.0 V, VREF = 2.5 V External
0
–160
–140
–120
–100
–80
–60
–40
–20
FREQUENCY (Hz)
0
10000
8000
6000
4000
2000
VDD = VDRIVE = 3.3V
VREF = 2.5V INTERNAL
fIN = 1kHz
fSAMPLE = 22.2kSPS
fSCL = 400kHz
SNR = 68.4dB
SINAD = 68.2dB
THD = –83.3dB
SFDR = –87.9dB
Figure 12. 10 kHz FFT, VDD = 3.0 V, VREF = 2.5 V Internal
64
65
66
67
68
69
70
1
10
100
INPUT FREQUENCY (kHz)
VDD = 3.3V
VREF = 2.5V
SIGNAL AMPLITUDE = –0.5dB
fSCL = 400kHz
TA = 25°C
SNR
SINAD
Figure 13. SNR, SINAD vs. Input Frequency
66
REFERENCE INPUT VOLTAGE (V)
1.0
71
70
1.5
65
64
63
62
67
69
2.5
4.0
4.5
5.0
11.7
11.5
11.3
11.1
10.9
10.7
10.5
10.3
10.1
9.9
2.0
3.0
3.5
68
ENOB
SINAD
SNR
VDD = 3.0V
VREF = EXTERNAL
fSCL = 400kHz
fIN = 1kHz
SIGNAL AMPLITUDE = –0.5dB
TA = 25°C
Figure 14. SNR, SINAD, and ENOB vs. Reference Input Voltage
–90
–88
–86
–84
–82
–80
–78
–76
–74
–72
–70
1
10
100
ANALOG INPUT FREQUENCY (kHz)
VDD = 3.3V
VREF = 2.5V
SIGNAL AMPLITUDE = –0.5dB
fSCL = 400kHz
TA = 25°C
Figure 15. THD vs. Analog Input Frequency
70.0
69.5
69.0
68.5
68.0
67.5
67.0
66.5
66.0
INPUT LEVEL (dB)
VDD = 3.0V
VREF = 2.5V
fSCL = 400kHz
fIN = 1kHz
TA = 25°C
–10
0
–1
–2
–3
–4
–5
–6
–7
–8
–9
Figure 16. SNR vs. Input Level


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