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ADS8422 Datasheet(PDF) 3 Page - Texas Instruments

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Part # ADS8422
Description  16-BIT, 4-MSPS, PSEUDO-BIPOLAR, FULLY DIFFERENTIAL INPUT, MICROPOWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH PARALLEL INTERFACE, REFERENCE
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

ADS8422 Datasheet(HTML) 3 Page - Texas Instruments

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SPECIFICATIONS
ADS8422
SLAS512B – JUNE 2006 – REVISED DECEMBER 2006
T
A = –40°C to 85°C, +VA = 5 V, +VAREG = 5 V to 3 V, +VBD = 5 V to 2.7 V, fSAMPLE = 4 MSPS, Vref = 4.096 V (measured
with internal reference buffer) (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ANALOG INPUT
Full-scale input voltage(1)
+IN – (–IN)
–Vref
Vref
V
+IN
–0.2
Vref + 0.2
Absolute input voltage
V
–IN
–0.2
Vref + 0.2
Common-mode input range
(Vref)/2 – 0.2
(Vref)/2
(Vref)/2 + 0.2
V
Input capacitance
30
pF
Input leakage current
1
nA
SYSTEM PERFORMANCE
Resolution
16
Bits
ADS8422I
15
No missing codes
Bits
ADS8422IB
16
ADS8422I
–6
±2
6
LSB
Integral linearity (2)(3)
(16 bit)(2)
ADS8422IB
–2
±1
2
ADS8422I
–2
±0.7
2
LSB
Differential linearity
(16 bit)
ADS8422IB
–1
±0.7
1.5
Offset error
–0.5
±0.25
0.5
mV
Offset error drift
±0.2
ppm/
°C
Gain error(4)(5)
Vref = 4.096 V
–0.1
±0.05
0.1
%FS
Gain error drift
Vref = 4.096 V
±2
ppm/
°C
At dc
81
Common-mode rejection ratio
dB
At code 0000h with [+IN + (–IN)]/2 =
78
512 mVpp at 500 kHz,
Noise
At 0000h output code
40
µV RMS
Power supply rejection ratio
At 8000h output code
78
dB
SAMPLING DYNAMICS
Conversion time
0.180
µs
Acquisition time
0.070
µs
Throughput rate
4
MHz
Aperture delay
3
ns
Aperture jitter
7
ps RMS
Step response
70
ns
Overvoltage recovery
140
ns
(1)
Ideal input span, does not include gain or offset error.
(2)
LSB means least significant bit and is equal to 2VREF/65536.
(3)
This is endpoint INL, not best fit.
(4)
Measured relative to an ideal full-scale input [+IN – (–IN)] of 8.192 V.
(5)
This specification does not include the internal reference voltage error and drift.
3
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