AD7291 Analog Devices, AD7291 Datasheet - Page 3

• Manufacturer Part Number: AD7291
• Description: 8-Channel, I2C, 12-Bit SAR ADC with Temperature Sensor
• Manufacturer: Analog Devices

Specifications of AD7291

• Resolution (bits): 12bit
• # Chan: 8
• Sample Rate: 22.2kSPS
• Interface: I²C/Ser 2-Wire,Ser
• Analog Input Type: SE-Uni
• Ain Range: Uni (Vref)
• Adc Architecture: SAR
• Pkg Type: CSP

Data Sheet
SPECIFICATIONS
V
unless otherwise noted.
Table 2.
Parameter
DYNAMIC PERFORMANCE
DC ACCURACY
ANALOG INPUT
REFERENCE INPUT/OUTPUT
LOGIC INPUTS (SDA, SCL)
DD
Signal-to-Noise Ratio (SNR)
Signal-to-Noise (+ Distortion) Ratio (SINAD)
Total Harmonic Distortion (THD)
Spurious-Free Dynamic Range (SFDR)
Intermodulation Distortion (IMD)
Channel-to-Channel Isolation
Full Power Bandwidth
Resolution
Integral Nonlinearity (INL)
Differential Nonlinearity (DNL)
Offset Error
Offset Error Matching
Offset Temperature Drift
Gain Error
Gain Error Matching
Gain Temperature Drift
Input Voltage Ranges
DC Leakage Current
Input Capacitance
Reference Output Voltage
Long-Term Stability
Output Voltage Hysteresis
Reference Input Voltage Range
DC Leakage Current
V
Reference Temperature Coefficient
V
Input High Voltage, V
Input Low Voltage, V
Input Current, I
Input Capacitance, C
Input Hysteresis, V
REF
REF
= 2.8 V to 3.6 V; V
Second-Order Terms
Third-Order Terms
Output Impedance
Noise
3
2
2
IN
3
HYST
2
INL
IN
DRIVE
INH
2
3
3
= 1.65 V to 3.6 V; f
2
4
2
2
5
2
2
SCL
= 400 kHz, fast SCLK mode; V
Min
70
70
12
0
2.4925
1
0.7 × V
0.1 × V
Rev. B | Page 3 of 28
DRIVE
DRIVE
Typ
71
71
−84
−85
−88
−88
−100
30
10
±0.5
±0.5
±2
±2.5
4
±1
±1
0.5
±0.01
34
8
2.5
150
50
±0.01
1
12
60
±0.01
6
Max
−78
−80
±1
±0.99
±4.5
±4.5
±4
±2.5
V
±1
2.5075
2.5
±1
35
0.3 × V
±1
REF
REF
DRIVE
= 2.5 V internal/external; T
Unit
dB
dB
dB
dB
dB
dB
dB
MHz
MHz
Bits
LSB
LSB
LSB
LSB
ppm/°C
LSB
LSB
ppm/°C
V
μA
pF
pF
V
ppm
ppm
V
μA
Ω
ppm/°C
μV rms
V
V
μA
pF
V
1
Test Conditions/Comments
f
f
f
At 3 dB
At 0.1 dB
Guaranteed no missed codes to 12 bits
When in track
When in hold
±0.3% maximum at 25°C
For 1000 hours
External reference applied to Pin V
Bandwidth = 10 MHz
V
IN
A
IN
IN
= 5.4 kHz, f
= 1 kHz sine wave
= 10 kHz
= 0 V or V
A
= −40°C to +125°C,
DRIVE
B
= 4.6 kHz
AD7291
REF