AD7991 Analog Devices, AD7991 Datasheet - Page 15

• Manufacturer Part Number: AD7991
• Description: 4-Channel, 12-Bit ADC with I2C Compatible Interface in 8-Lead SOT-23
• Manufacturer: Analog Devices

Specifications of AD7991

• Resolution (bits): 12bit
• # Chan: 4
• Sample Rate: 140kSPS
• Interface: I²C/Ser 2-Wire
• Analog Input Type: SE-Uni
• Ain Range: Uni (Vref),Uni Vdd
• Adc Architecture: SAR
• Pkg Type: SOT

–100
–120
–20
–40
–60
–80
0
0
Without Clock Stretching, V
Figure 16. Dynamic Performance, f
5
Seven-Term Blackman-Harris Window
10
15
FREQUENCY (kHz)
20
DD
25
= 5 V, Full-Scale Input,
30
SCL
= 1.71 MHz
16384 POINT FFT
f
f
f
SNR = 71.77dB
SINAD = 71.45dB
THD = –82.43dB
SFDR = –95.02dB
S
SCL
IN
35
= 95kSPS
= 10.13kHz
= 1.71MHz
40
45
Rev. B | Page 15 of 28
3
2
1
0
0
Figure 17. Power vs. SCL Frequency, V
500
AD7991/AD7995/AD7999
SCL FREQUENCY (kHz)
V
V
DD
DD
1000
= 5V
= 3V
REF
= 2.5 V
1500