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ADS1282-SP Datasheet(PDF) 7 Page - Texas Instruments

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Part # ADS1282-SP
Description   Radiation Tolerant High-Resolution Delta Sigma ADC
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

ADS1282-SP Datasheet(HTML) 7 Page - Texas Instruments

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ADS1282-SP
www.ti.com
SBAS691 – MARCH 2016
Product Folder Links: ADS1282-SP
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Copyright © 2016, Texas Instruments Incorporated
Electrical Characteristics (continued)
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
(5)
Best-fit method.
(6)
FSR: Full-scale range = ±VREF / (2 × PGA).
(7)
The maximum limit applies to SMD 5962L14231 post 50 kRads (Si) test at 25°C.
(8)
Calibration accuracy is on the level of noise reduced by 4 (calibration averages 16 readings).
(9)
The PGA output impedance and the modulator input impedance results in –1% systematic gain error
(10) Gain match relative to PGA = 1.
(11) ƒCM is the input common-mode frequency. ƒPS is the power-supply frequency.
(12) Input frequencies in the range of NƒCLK / 512 ± ƒDATA / 2 (N = 1, 2, 3...) can mix with the modulator chopping clock. In these frequency
ranges intermodulation = 120 dB, typ.
(13) At DC. See Figure 42.
Integral nonlinearity (INL)(5)
Differential
input
0.00005
0.0090 % FSR(6)
Post 50 kRads (Si),
TJ = 25°C
(7)
0.0170 % FSR(6)
Offset error
Shorted input
50
200
μV
Post 50 kRads (Si),
TJ = 25°C
(7)
750
μV
Offset error after calibration(8)
1
μV
Offset drift
0.02
μV/°C
Gain error(9)
–1.5%
–1.0%
–0.5%
Gain error after calibration(8)
0.0002%
Gain drift
PGA = 1
2
ppm/°C
PGA = 16
9
ppm/°C
Gain matching(10)
0.3%
0.8%
Common-mode rejection
ƒCM = 60 Hz
(11)
82
110
dB
Power-supply rejection
AVDD,
AVSS
ƒPS = 60 Hz
(11)
80
90
dB
Post 50 kRads (Si),
TJ = 25°C
(7)
64
90
dB
DVDD
90
115
dB
VOLTAGE REFERENCE INPUTS
Reference input voltage
(VREF = VREFP – VREFN)
0.5
5
(AVDD –
AVSS) + 0.2
V
Negative reference input
VREFN
AVSS – 0.1
VREFP – 0.5
V
Positive reference input
VREFP
VREFN + 0.5
AVDD + 0.1
V
Reference input impedance
85
k
DIGITAL FILTER RESPONSE
Passband ripple
±0.003
dB
Passband (–0.01 dB)
0.375 × ƒDATA
Hz
Bandwidth (–3 dB)
0.413 × ƒDATA
Hz
High-pass filter corner
0.1
10
Hz
Stop band attenuation(12)
135
dB
Stop band
0.500 × ƒDATA
Hz
Group delay
Minimum phase filter(13)
5 / ƒDATA
s
Linear phase filter
31 / ƒDATA
s
Settling time (latency)
Minimum phase filter
62 / ƒDATA
s
Linear phase filter
62 / ƒDATA
s


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