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AD7894 데이터시트(PDF) 2 Page - Analog Devices

부품명 AD7894
상세설명  5 V, 14-Bit Serial, 5 ms ADC in SO-8 Package
PDF  12 Pages
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제조업체  AD [Analog Devices]
홈페이지  http://www.analog.com
Logo AD - Analog Devices

AD7894 데이터시트(HTML) 2 Page - Analog Devices

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–2–
REV. 0
AD7894–SPECIFICATIONS
(VDD = +5 V
5%, GND = 0 V, REF IN = +2.5 V. All specifications TMIN to TMAX unless
otherwise noted.)
Parameter
A Versions
l
B Versions
1
Units
Test Conditions/Comments
DYNAMIC PERFORMANCE
2
Signal to (Noise + Distortion) Ratio
3
@ +25
°C
78
78
dB min
fIN = 70 kHz Sine Wave, fSAMPLE = 160 kHz
TMIN to TMAX
77
77
dB min
See Figure 14
Total Harmonic Distortion (THD)
3
–86
–86
dB max
fIN = 10 kHz Sine Wave, fSAMPLE = 160 kHz,
Typically –87 dB. See Figure 15
Peak Harmonic or Spurious Noise
3
–92
–92
dB typ
fIN = 10 kHz Sine Wave, fSAMPLE = 160 kHz
Intermodulation Distortion (IMD)
3
fa = 9 kHz, fb = 9.5 kHz, fSAMPLE = 160 kHz
2nd Order Terms
–92
–92
dB typ
3rd Order Terms
–92
–92
dB typ
DC ACCURACY
Resolution
14
14
Bits
Minimum Resolution for Which
No Missing Codes Are Guaranteed
14
14
Bits
Relative Accuracy
3
±2
±1.5
LSB max
Differential Nonlinearity
3
–1 to +1.5
–1 to +1.5
LSB max
AD7894-2
Positive Gain Error
3
±12
±10
LSB max
Unipolar Offset Error
±8
±6
LSB max
AD7894-10, AD7894-3 Only
Positive Gain Error
3
±8
±6
LSB max
Negative Gain Error
3
±8
±6
LSB max
Bipolar Zero Error
±10
±8
LSB max
ANALOG INPUT
AD7894-10
Input Voltage Range
±10
±10
V
Input Current
2
2
mA max
See Analog Input Section
AD7894-3
Input Voltage Range
±2.5
±2.5
V
Input Current
1.5
1.5
mA max
See Analog Input Section
AD7894-2
Input Voltage Range
0 to +2.5
0 to +2.5
V
Input Current
500
500
nA max
REFERENCE INPUT
REF IN Input Voltage Range
2.375/2.625
2.375/2.625
V min/V max
2.5 V
± 5%
Input Current
1
1
µA max
Input Capacitance
4
10
10
pF max
LOGIC INPUTS
Input High Voltage, VINH
2.4
2.4
V min
VDD = 5 V ± 5%
Input Low Voltage, VINL
0.8
0.8
V max
VDD = 5 V ± 5%
Input Current, IIN
±10
±10
µA max
VIN = 0 V to VDD
Input Capacitance, CIN
4
10
10
pF max
LOGIC OUTPUTS
Output High Voltage, VOH
4.0
4.0
V min
ISOURCE = 400 µA
Output Low Voltage, VOL
0.4
0.4
V max
ISINK = 1.6 mA
Output Coding
AD7894-10, AD7894-3
Twos Complement
AD7894-2
Straight (Natural) Binary
CONVERSION RATE
Conversion Time
Mode 1 Operation
5
5
µs max
Mode 2 Operation
5
10
10
µs max
Track/Hold Acquisition Time
3
0.35
0.35
µs max
SAMPLE AND HOLD
–3 dB Small Signal Bandwidth
7.5
7.5
MHz typ
Aperture Jitter
50
50
ps typ



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