AD7942 Analog Devices, AD7942 Datasheet - Page 10

• Manufacturer Part Number: AD7942
• Manufacturer: Analog Devices

Specifications of AD7942

• Resolution (bits): 14bit
• # 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: CSP,SOP

AD7942
86
85
84
83
82
2.0
90
85
80
75
70
95
90
85
80
75
Figure 11. SNR, SINAD, and ENOB vs. Reference Voltage
0
–55
2.5
–35
Figure 12. SINAD vs. Frequency
Figure 13. SNR vs. Temperature
–15
3.0
50
REFERENCE VOLTAGE (V)
SINAD
5
FREQUENCY (kHz)
TEMPERATURE (°C)
3.5
SNR
ENOB
V
REF
25
100
= 2.5V
4.0
V
V
REF
45
REF
V
REF
= 5V, –10dB
= 5V
= 2.5V, –1dB
4.5
65
V
150
REF
85
5.0
= 5V, –1dB
105
5.5
15.0
14.5
14.0
13.5
13.0
200
125
Rev. B | Page 10 of 24
–100
–105
–110
–115
–100
–110
–120
1000
750
500
250
–80
–85
–90
–95
–90
0
–55
2.3
0
f
S
–35
= 100kSPS
2.7
Figure 16. Operating Currents vs. Supply
V
Figure 15. THD vs. Temperature
40
–15
REF
Figure 14. THD vs. Frequency
3.1
V
= 2.5V
REF
5
TEMPERATURE (°C)
= 2.5V, –1dB
3.5
FREQUENCY (kHz)
80
SUPPLY (V)
VDD
VIO
25
V
3.9
REF
45
= 5V, –1dB
120
V
4.3
REF
65
= 5V
4.7
85
160
5.1
105
125
5.5
200