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ADS1258MPHPTEP Datasheet(PDF) 3 Page - Texas Instruments

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Part # ADS1258MPHPTEP
Description  16-CHANNEL, 24-BIT ANALOG-TO-DIGITAL CONVERTER
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

ADS1258MPHPTEP Datasheet(HTML) 3 Page - Texas Instruments

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ADS1258-EP
www.ti.com
SBAS445C – MARCH 2009 – REVISED DECEMBER 2009
ELECTRICAL CHARACTERISTICS
All specifications at TA = –55°C to 125°C, AVDD = 2.5 V, AVSS = –2.5 V, DVDD = 3.3 V, fCLK = 16 MHz (external clock) or fCLK = 15.729
MHz (internal clock), OPA227 buffer between MUX outputs and ADC inputs, VREF = 4.096 V, and VREFN = –2.5 V, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP(1)
MAX
UNIT
Analog Multiplexer Inputs
AIN0–AIN15,
AVSS –
AVDD +
Absolute Input Voltage
AINCOM with respect to
V
100 mV
100mV
DGND
On-Channel Resistance
80
Crosstalk
fIN = 1 kHz
–110
dB
SBCS[1:0] = 01
1.5
Sensor Bias (Current Source)
μA
SBCS[1:0] = 11
24
1.5
μA:24 μA Ratio Error
1
%
ADC Input
Full-Scale Input Voltage
(VIN = ADCINP – ADCINN)
±1.0 6 VREF
V
Absolute Input Voltage
(ADCINP, ADCINN)
AVSS –
AVDD +
V
100 mV
100mV
Differential Input Impedance
65
k
System Performance
Resolution
No Missing Codes
24
Bits
Data Rate, Fixed-Channel Mode
1.953
125
kSPS
Data Rate, Auto-Scan Mode
1.805
23.739
kSPS
Integral Nonlinearity (INL)(2)
Differential Input
0.0003
0.0010
% of
FSR(3)
Chopping Off
20
Offset Error
Shorted
TA = –40°C to 105°C
1
10
μV
Chopping On
Inputs
TA = –55°C to 125°C
-650
650
Chopping Off
0.5
Offset Drift
Shorted Inputs
μV/°C
Chopping On
0.02
0.1
TA = –40°C to 105°C
0.1
0.5
Gain Error
%
TA = –55°C to 125°C
-0.5
0.1
0.5
TA = –40°C to 105°C
0.4
2
Gain Drift
ppm/°C
TA = –55°C to 125°C
0.4
Noise
(see Table 4)
Common-Mode Rejection
fCM = 60 Hz
90
100
dB
AVDD, AVSS
70
85
Power-Supply Rejection
fPS = 60 Hz
dB
DVDD
80
95
Voltage Reference Input
Reference Input Voltage
(VREF = VREFP – VREFN)
0.5
4.096
AVDD –
V
AVSS
Negative Reference Input (VREFN)
AVSS – 0.1 V
VREFP – 0.5
V
Positive Reference Input (VREFP)
VREFN + 0.5
AVDD + 0.1V
V
Reference Input Impedance
40
k
System Parameters
External Reference Reading Error
1
3
%
Analog Supply Reading Error
1
3
%
Voltage
TA = 25°C
168
mV
Temperature Sensor Reading
Coefficient
394
μV/°C
Digital Input/Output
(1)
TA = 25°C for typical parameters.
(2)
Best straight line fit method.
(3)
FSR = Full-scale range = 2.13 VREF.
Copyright © 2009, Texas Instruments Incorporated
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Product Folder Link(s): ADS1258-EP


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