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AD7829-1 Datasheet(PDF) 3 Page - Analog Devices

Part No. AD7829-1
Description  3 V/5 V, 2 MSPS, 8-Bit, 8-Channel ADC
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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AD7829-1
Rev. 0 | Page 3 of 20
SPECIFICATIONS
VDD = 3 V ± 10%, VDD = 5 V ± 10%, GND = 0 V, VREF IN/OUT = 2.5 V. All specifications −40°C to +85°C, unless otherwise noted.
Table 1.
Parameter
Version B
Unit
Test Conditions/Comments
DYNAMIC PERFORMANCE
fIN = 30 kHz, fSAMPLE = 2 MHz
Signal to (Noise + Distortion) Ratio1
48
dB min
Total Harmonic Distortion1
−55
dB max
Peak Harmonic or Spurious Noise1
−55
dB max
Intermodulation Distortion1
fa = 27.3 kHz, fb = 28.3 kHz
2nd Order Terms
−65
dB typ
3rd Order Terms
−65
dB typ
Channel-to-Channel Isolation1
−70
dB typ
fIN = 20 kHz
DC ACCURACY
Resolution
8
Bits
Minimum Resolution for Which
No Missing Codes Are Guaranteed
8
Bits
Integral Nonlinearity (INL)1
±0.75
LSB max
Differential Nonlinearity (DNL)1
±0.75
LSB max
Gain Error1
±2
LSB max
Gain Error Match1
±0.1
LSB typ
Offset Error1
±1
LSB max
Offset Error Match1
±0.1
LSB typ
ANALOG INPUTS2
See Analog Input section
VDD = 5 V ± 10%
Input voltage span = 2.5 V
VIN1 to VIN8 Input Voltage
VDD
V max
0
V min
VMID Input Voltage
VDD − 1.25
V max
Default VMID = 1.25 V
1.25
V min
VDD = 3 V ± 10%
Input voltage span = 2 V
VIN1 to VIN8 Input Voltage
VDD
V max
0
V min
VMID Input Voltage
VDD − 1
V max
Default VMID = 1 V
1
V min
VIN Input Leakage Current
±1
μA max
VIN Input Capacitance
15
pF max
VMID Input Impedance
6
kΩ typ
REFERENCE INPUT
VREF IN/OUT Input Voltage Range
2.55
V max
2.5 V + 2%
2.45
V min
2.5 V − 2%
Input Current
1
μA typ
100
μA max
ON-CHIP REFERENCE
Nominal 2.5 V
Reference Error
±50
mV max
Temperature Coefficient
50
ppm/°C typ
LOGIC INPUTS
Input High Voltage, VINH
2.4
V min
VDD = 5 V ± 10%
Input Low Voltage, VINL
0.8
V max
VDD = 5 V ± 10%
Input High Voltage, VINH
2
V min
VDD = 3 V ± 10%
Input Low Voltage, VINL
0.4
V max
VDD = 3 V ± 10%
Input Current, IIN
±1
μA max
Typically 10 nA, VIN = 0 V to VDD
Input Capacitance, CIN
10
pF max




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