AD7992 Analog Devices, AD7992 Datasheet - Page 10

• Manufacturer Part Number: AD7992
• Description: 2-Channel, 12-Bit ADC with I2C Compatible Interface in 10-Lead MSOP
• Manufacturer: Analog Devices

Specifications of AD7992

• Resolution (bits): 12bit
• # Chan: 2
• Sample Rate: 79kSPS
• Interface: I²C/Ser 2-Wire,Ser
• Analog Input Type: SE-Uni
• Ain Range: Uni (Vref),Uni Vdd
• Adc Architecture: SAR
• Pkg Type: SOP

AD7992
TYPICAL PERFORMANCE CHARACTERISTICS
Figure 6. PSRR vs. Supply-Ripple Frequency, Single-Channel Mode Only
Figure 5. Dynamic Performance with 5.5 V Supply and 5.5 V Reference,
–100
–120
–100
–120
Figure 4. Dynamic Performance with 5 V Supply and 2.5 V Reference,
–20
–40
–60
–80
–20
–40
–60
–80
100
30
90
80
70
60
50
40
20
0
0
0
10
0
V
DD
= 3V
10
121 kSPS, Mode 1, Single-Channel Mode
121 KSPS, Mode 1, Dual-Channel Mode
SUPPLY-RIPPLE FREQUENCY (kHz)
V
DD
20
20
= 5V
FREQUENCY (kHz)
FREQUENCY (kHz)
30
100
V
200mV p-p SINE WAVE
ON V
2nF CAPACITOR ON V
DD
40
= 3V/5V
40
DD
SNR = 73.23dB
SINAD = 73.10dB
THD = –88.59dB
SFDR = –90.46dB
F
F
F
F
F
F
SNR = 71.84dB
SINAD = 71.68dB
THD = –86.18dB
SFDR = –88.70dB
S
SCL
IN
S
SCL
IN
= 121kSPS
= 10kHz
= 121kSPS
= 10kHz
= 3.4MHz
= 3.4MHz
50
DD

1000
60
60
Rev. 0 | Page 10 of 28
Figure 7. SINAD vs. Analog Input Frequency for Various Supply Voltages at
–0.2
–0.4
–0.6
–0.8
–1.0
–0.2
–0.4
–0.6
–0.8
–1.0
76
74
72
70
68
66
64
62
60
1.0
0.8
0.6
0.4
0.2
1.0
0.8
0.6
0.4
0.2
0
0
1
0
0
Figure 9. Typical DNL, V
V
Figure 8. Typical INL, V
V
DD
DD
= 2.7V
= 5.5V
500
500
1000
1000
136 kSPS with 3.4 MHz f
INPUT FREQUENCY kHz
3.4 MHz f
3.4 MHz f
1500
1500
DD
DD
= 5.5 V, Reference = 2.5 V, Mode 1,
= 5.5 V, Reference = 2.5 V Mode 1,
CODE
2000
CODE
2000
10
SCL
SCL
, 121 kSPS
, 121 kSPS
V
V
DD
DD
2500
2500
= 5.0V
= 3.0V
SCL
3000
3000
V
V
V
DD
DD
REF
3500
= 4.5V
3500
= 3.3V
= V
DD
4000
4000
100