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AD7298 Datasheet(PDF) 3 Page - Analog Devices

Part # AD7298
Description  8-Channel, I2C, 12-Bit SAR ADC with Temperature Sensor
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7298 Datasheet(HTML) 3 Page - Analog Devices

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AD7291
Rev. 0 | Page 3 of 28
SPECIFICATIONS
VDD = 2.8 V to 3.6 V; VDRIVE = 1.65 V to 3.6 V; fSCL = 400 kHz, fast SCLK mode; VREF = 2.5 V internal/external; TA = −40°C to +125°C,
unless otherwise noted.
Table 2.
Parameter
Min
Typ
Max
Unit
1F
1
Test Conditions/Comments
DYNAMIC PERFORMANCE
fIN = 1 kHz sine wave
Signal-to-Noise Ratio (SNR)2
70
71
dB
Signal-to-Noise (+ Distortion) Ratio (SINAD)2
70
71
dB
Total Harmonic Distortion (THD)2
−84
−78
dB
Spurious-Free Dynamic Range (SFDR)
−85
−80
dB
Intermodulation Distortion (IMD)
fA = 5.4 kHz, fB = 4.6 kHz
Second-Order Terms
−88
dB
Third-Order Terms
−88
dB
Channel-to-Channel Isolation
−100
dB
fIN = 10 kHz
Full Power Bandwidth3
30
MHz
At 3 dB
10
MHz
At 0.1 dB
DC ACCURACY
Resolution
12
Bits
Integral Nonlinearity (INL)2
±0.5
±1
LSB
Differential Nonlinearity (DNL)2
±0.5
±0.99
LSB
Guaranteed no missed codes to 12 bits
Offset Error2
±2
±4.5
LSB
Offset Error Matching2
±2.5
±4.5
LSB
Offset Temperature Drift
4
ppm/°C
Gain Error2
±1
±4
LSB
Gain Error Matching2
±1
±2.5
LSB
Gain Temperature Drift
0.5
ppm/°C
ANALOG INPUT
Input Voltage Ranges
0
VREF
V
DC Leakage Current
±0.01
±1
μA
Input Capacitance3
34
pF
When in track
8
pF
When in hold
REFERENCE INPUT/OUTPUT
Reference Output Voltage4
2.4925
2.5
2.5075
V
±0.3% maximum at 25°C
Long-Term Stability
150
ppm
For 1000 hours
Output Voltage Hysteresis
50
ppm
Reference Input Voltage Range5
1
2.5
V
DC Leakage Current
±0.01
±1
μA
External reference applied to Pin VREF
VREF Output Impedance
1
Ω
Reference Temperature Coefficient
12
35
ppm/°C
VREF Noise3
60
μV rms
Bandwidth = 10 MHz
LOGIC INPUTS (SDA, SCL)
Input High Voltage, VINH
0.7 × VDRIVE
V
Input Low Voltage, VINL
0.3 × VDRIVE
V
Input Current, IIN
±0.01
±1
μA
VIN = 0 V or VDRIVE
Input Capacitance, CIN3
6
pF
Input Hysteresis, VHYST
0.1 × VDRIVE
V


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