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AD7991 Datasheet(PDF) 7 Page - Analog Devices

Part # AD7991
Description  4-Channel, 12-/10-/8-Bit ADC with I2C-Compatible Interface in 8-Lead SOT-23
PDF  28 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7991 Datasheet(HTML) 7 Page - Analog Devices

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AD7991/AD7995/AD7999
Rev. A | Page 7 of 28
AD79991
The temperature range for the Y version is −40°C to +125°C. Unless otherwise noted, VDD = 2.7 V to 5.5 V, VREF = 2.5 V, fSCL = 3.4 MHz,
and TA = TMIN to TMAX.
Table 4.
A Version2
Y Version
Parameter
Min
Typ
Max
Min
Typ
Max
Unit
Test Conditions/Comments
DYNAMIC PERFORMANCE3, 4
See the Sample Delay and Bit Trial Delay section,
fIN = 10 kHz sine wave for fSCL from 1.7 MHz to 3.4 MHz
fIN = 1 kHz sine wave for fSCL up to 400 kHz
Signal-to-Noise and
Distortion (SINAD)5
49.5
49.5
dB
Total Harmonic
Distortion (THD)5
−65
−65
dB
Peak Harmonic or
Spurious Noise (SFDR)5
−65
−65
dB
Intermodulation
Distortion (IMD)5
fa = 11 kHz, fb = 9 kHz for fSCL from 1.7 MHz to
3.4 MHz
fa = 5.4 kHz, fb = 4.6 kHz for fSCL up to 400 kHz
Second-Order Terms
−83
−83
dB
Third-Order Terms
−75
−75
dB
Channel-to-Channel
Isolation5
−90
−90
dB
fIN = 10 kHz
Full-Power Bandwidth5
14
14
MHz
@ 3 dB
1.5
1.5
MHz
@ 0.1 dB
DC ACCURACY3, 6
Resolution
8
8
Bits
Integral Nonlinearity5
±0.04
±0.1
LSB
Differential Nonlinearity5
±0.05
±0.1
LSB
Guaranteed no missed codes to eight bits
Offset Error5
±0.3
±0.35
LSB
Offset Error Matching
±0.02
±0.05
LSB
Offset Temperature Drift
4.26
4.26
ppm/°C
Gain Error5
±0.06
±0.175
LSB
Gain Error Matching
±0.03
±0.06
LSB
Gain Temperature Drift
0.59
0.59
ppm/°C
ANALOG INPUT
Input Voltage Range
0
VREF
0
VREF
V
VREF = VIN3/VREF or VDD
DC Leakage Current
±1
±1
μA
Input Capacitance
34
34
pF
Channel 0 to Channel 2—during acquisition phase
4
4
pF
Channel 0 to Channel 2—outside acquisition phase
35
35
pF
Channel 3—during acquisition phase
5
5
pF
Channel 3—outside acquisition phase
REFERENCE INPUT
VREF Input Voltage Range
1.2
VDD
1.2
VDD
V
DC Leakage Current
±1
±1
μA
VREF Input Capacitance
5
5
pF
Outside conversion phase
35
35
pF
During conversion phase
Input Impedance
69
69
kΩ



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