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ADS8381 Datasheet(PDF) 3 Page - Texas Instruments

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Part No. ADS8381
Description  18-BIT, 580-kHz, UNIPOLAR INPUT, MICRO POWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH PARALLEL INTERFACE
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
Logo TI - Texas Instruments

ADS8381 Datasheet(HTML) 3 Page - Texas Instruments

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ADS8381
SLAS364D − APRIL 2002 − REVISED FEBRUARY 2005
www.ti.com
3
SPECIFICATIONS
TA = −40°C to 85°C, +VA = 5 V, +VBD = 3 V or 5 V, Vref = 4.096 V, fSAMPLE = 580 kHz (unless otherwise noted)
PARAMETER
TEST
ADS8381IB
ADS8381I
UNIT
PARAMETER
TEST
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNIT
Analog Input
Full-scale input voltage (see Note 1)
+IN − −IN
0
Vref
0
Vref
V
Absolute input voltage
+IN
−0.2
Vref + 0.2
−0.2
Vref + 0.2
V
Absolute input voltage
−IN
−0.2
0.2
−0.2
0.2
V
Input capacitance
45
45
pF
Input leakage current
1
1
nA
System Performance
Resolution
18
18
Bits
No missing codes
18
17
Bits
Integral linearity (see Notes 2 and 3)
< 0.125 FS
−4
−2.2/1
4
−5
5
LSB
Integral linearity (see Notes 2 and 3)
> 0.125 FS
−5
−3/2
5
−6
6
LSB
(18 bit)
Differential linearity
−1
−0.6/1.25
2
−2
3
LSB
(18 bit)
Offset error
−0.75
±0.25
0.75
−1
±0.5
1
mV
Gain error (see Note 4)
−0.075
0.075
−0.1
0.1
%FS
Noise
60
60
µV RMS
Power supply rejection ratio
At 3FFFFh
output code
75
75
dB
Sampling Dynamics
Conversion time
1.4
1.4
µs
Acquisition time
0.3
0.3
µs
Throughput rate
580
580
kHz
Aperture delay
4
4
ns
Aperture jitter
15
15
ps
Step response
150
150
ns
Over voltage recovery
150
150
ns
(1) Ideal input span, does not include gain or offset error.
(2) LSB means least significant bit
(3) This is endpoint INL, not best fit.
(4) Measured relative to an ideal full-scale input (+IN − −IN) of 4.096 V


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