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ADS1282IPWG4 Datasheet(PDF) 6 Page - Texas Instruments

No. de pieza ADS1282IPWG4
Descripción Electrónicos   Radiation Tolerant High-Resolution Delta Sigma ADC
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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ADS1282IPWG4 Datasheet(HTML) 6 Page - Texas Instruments

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6
ADS1282-SP
SBAS691 – MARCH 2016
www.ti.com
Product Folder Links: ADS1282-SP
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
(1)
For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application
report, SPRA953.
7.3 Thermal Information
THERMAL METRIC(1)
ADS1282-SP
UNIT
HKV [CFP (TBAR)]
28 PINS
RθJA
Junction-to-ambient thermal resistance
64.4
°C/W
RθJC(top)
Junction-to-case (top) thermal resistance
16
°C/W
RθJB
Junction-to-board thermal resistance
58.6
°C/W
ψJT
Junction-to-top characterization parameter
13.3
°C/W
ψJB
Junction-to-board characterization parameter
50.5
°C/W
RθJC(bot)
Junction-to-case (bottom) thermal resistance
5.3
°C/W
(1)
ƒCLK = system clock.
(2)
Input impedance is improved by disabling input chopping (CHOP bit = 0).
(3)
VIN = 20 mVDC / PGA, see Table 1.
(4)
VIN = 31.25 Hz, –0.5 dBFS.
7.4 Electrical Characteristics
AVDD = 2.5 V, AVSS = –2.5 V, ƒCLK
(1) = 4.096 MHz, VREFP = 2.5 V, VREFN = –2.5 V, DVDD = 3.3 V, CAPN – CAPP = 10 nF, PGA = 1,
and ƒDATA = 1000 SPS, over operating temperature range, unless otherwise noted. Typical values are TJ = 25°C. A total ionizing dose of 50
kRad (Si) exposure at a low dose rate of < 10 mRads (Si)/s, post tested at 25°C.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ANALOG INPUTS
Full-scale input voltage
VIN = (AINP – AINN)
(VREFP – VREFN) / (PGA)
Vpp-diff
Absolute input range
AINP
or AINN
AVSS + 0.7
AVDD – 1.25
V
PGA input voltage noise density
5
nV/
√Hz
Differential input impedance(2)
1
G
Common-mode input impedance
100
M
Input bias current
1
nA
Crosstalk
ƒ = 31.25 Hz
–128
dB
MUX on-resistance
30
PGA OUTPUT (CAPP, CAPN)
Absolute output range
AVSS + 0.4
AVDD – 0.4
V
PGA differential output impedance
600
Output impedance tolerance
±10%
External bypass capacitance
10
100
nF
Modulator differential input impedance
55
k
AC PERFORMANCE
Signal-to-noise ratio(3)
SNR
112
124
dB
Total harmonic distortion(4)
THD
PGA = 1...16
–122
–99
dB
PGA = 32
–117
–90
dB
PGA = 64
–115
dB
Spurious-free dynamic range
SFDR
123
dB
DC PERFORMANCE
Resolution
No missing codes
31
bits
Data rate
ƒDATA
FIR filter mode
250
4000
SPS
SINC filter mode
8000
128000
SPS


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