AD7991 Analog Devices, AD7991 Datasheet - Page 5

• 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

AD7995
The temperature range for the Y version is −40°C to +125°C. Unless otherwise noted, V
and T
Table 3.
Parameter
DYNAMIC PERFORMANCE
DC ACCURACY
ANALOG INPUT
REFERENCE INPUT
Signal-to-Noise and
Total Harmonic Distortion
Peak Harmonic or Spurious
Intermodulation
Channel-to-Channel
Full-Power Bandwidth
Resolution
Integral Nonlinearity
Differential Nonlinearity
Offset Error
Offset Error Matching
Offset Temperature Drift
Gain Error
Gain Error Matching
Gain Temperature Drift
Input Voltage Range
DC Leakage Current
Input Capacitance
V
DC Leakage Current
V
Input Impedance
REF
REF
(THD)
Distortion (IMD)
Isolation
Second-Order Terms
Third-Order Terms
Distortion (SINAD)
Noise (SFDR)
A
Input Voltage Range
Input Capacitance
= T
5
1
MIN
5
5
5
3, 6
to T
5
MAX
5
5
5
.
5
3 , 4
5
Min
10
0
1.2
Typ
61.5
−85
−85
−90
−86
−90
14
1.5
±1
±0.04
4.13
±0.15
±0.06
0.50
34
4
35
5
5
35
69
A Version
Max
±0.4
±0.4
V
±1
V
±1
REF
DD
2
Min
61
10
0
1.2
Rev. B | Page 5 of 28
Typ
−90
−86
−90
14
1.5
4.13
0.50
34
4
35
5
5
35
69
Y Version
Max
−75
−76
±0.4
±0.4
±2.25
±0.2
±0.5
±0.25
V
±1
V
±1
REF
DD
DD
Unit
dB
dB
dB
dB
dB
dB
MHz
MHz
Bits
LSB
LSB
LSB
LSB
ppm/°C
LSB
LSB
ppm/°C
V
μA
pF
pF
pF
pF
V
μA
pF
pF
kΩ
= 2.7 V to 5.5 V, V
Test Conditions/Comments
See the
section, f
1.7 MHz to 3.4 MHz
f
fa = 11 kHz, fb = 9 kHz for f
3.4 MHz
fa = 5.4 kHz, fb = 4.6 kHz for f
f
@ 3 dB
@ 0.1 dB
Guaranteed no missed codes to 10 bits
V
Channel 0 to Channel 2—during acquisition
phase
Channel 0 to Channel 2—outside acquisition
phase
Channel 3—during acquisition phase
Channel 3—outside acquisition phase
Outside conversion phase
During conversion phase
IN
IN
AD7991/AD7995/AD7999
REF
= 1 kHz sine wave for f
= 10 kHz
= V
Sample Delay and Bit Trial Delay
IN3
IN
/V
= 10 kHz sine wave for f
REF
REF
or V
= 2.5 V, f
DD
SCL
SCL
SCL
up to 400 kHz
SCL
from 1.7 MHz to
= 3.4 MHz,
up to 400 kHz
SCL
from