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ADS8661IPW Datasheet(PDF) 6 Page - Texas Instruments

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No. de pieza ADS8661IPW
Descripción Electrónicos  12-Bit, High-Speed, Single-Supply, SAR ADC Data Acquisition System with Programmable, Bipolar Input Ranges
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI1 - Texas Instruments

ADS8661IPW Datasheet(HTML) 6 Page - Texas Instruments

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ADS8661, ADS8665
SBAS780 – DECEMBER 2016
www.ti.com
Product Folder Links: ADS8661 ADS8665
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Electrical Characteristics (continued)
all minimum and maximum specifications are at TA = –40°C to +125°C; typical specifications are at TA = 25°C; AVDD = 5 V,
DVDD = 3.3 V, VREF = 4.096 V (internal), and maximum throughput (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
(2)
This specification indicates the endpoint INL, not best-fit INL.
(3)
Measured relative to actual measured reference.
(4)
Bipolar ranges are ±12.288 V, ±10.24 V, ±6.144 V, ±5.12 V, and ±2.56 V.
(5)
Unipolar ranges are 0 V–12.288 V, 0 V–10.24 V, 0 V–6.144 V, and 0 V–5.12 V.
(6)
Excludes internal reference accuracy error.
(7)
Excludes internal reference temperature drift.
(8)
All specifications expressed in decibels (dB) refer to the full-scale input (FSR) and are tested with a 1-kHz input signal 0.25 dB below
full-scale, unless otherwise specified.
(9)
Calculated on the first nine harmonics of the input frequency.
SYSTEM PERFORMANCE
Resolution
12
Bits
NMC
No missing codes
12
Bits
DNL
Differential nonlinearity(2)
All input ranges
–0.35
±0.1
0.35
LSB
INL
Integral nonlinearity(2)
All input ranges
–0.35
±0.15
0.35
LSB
EO
Offset error(3)
At TA = 25°C
All bipolar ranges(4)
–1
±0.2
1
mV
All unipolar ranges(5)
–2
±0.2
2
Offset error drift with temperature
All input ranges
–3
±0.75
3
ppm/°C
EG
Gain error(6)
At TA = 25°C, all input ranges
–0.025
±0.01
0.025
%FSR
Gain error drift with temperature(7)
All input ranges
–5
±1
5
ppm/°C
DYNAMIC CHARACTERISTICS
SNR
Signal-to-noise ratio(8)
All input ranges
73
73.5
dB
THD
Total harmonic distortion(9)(8)
All input ranges
–102
dB
SINAD
Signal-to-noise + distortion(8)
All input ranges
72.9
73.4
dB
SFDR
Spurious-free dynamic range(8)
All input ranges
103
dB
SAMPLING DYNAMICS
tCONV
Conversion time
ADS8661
550
ns
ADS8665
1000
tACQ
Acquisition time
ADS8661
250
ns
ADS8665
1000
fcycle
Maximum throughput rate
without latency
ADS8661
1250
kSPS
ADS8665
500
INTERNAL REFERENCE OUTPUT
VREFIO
On the REFIO pin
(configured as an output)
At TA = 25°C
TSSOP (PW)
4.095
4.096
4.097
V
WQFN (RUM)
4.094
4.096
4.098
dVREFIO/dTA
Internal reference temperature drift
TSSOP (PW)
4
ppm/°C
WQFN (RUM)
5
COUT_REFIO
Decoupling capacitor on REFIO pin
4.7
µF
VREFCAP
Reference voltage to the ADC
(on the REFCAP pin)
At TA = 25°C
4.095
4.096
4.097
V
REFCAP temperature drift
0.5
2
ppm/°C
COUT_REFCAP
Decoupling capacitor on REFCAP pin
10
μF
Turn-on time
COUT_REFCAP = 10 µF, COUT_REFIO = 10 µF
20
ms
EXTERNAL REFERENCE INPUT
VREFIO_EXT
External reference voltage on REFIO
REFIO pin configured as an input
4.046
4.096
4.146
V
AVDD COMPARATOR
VTH_HIGH
High threshold voltage
5.3
V
VTH_LOW
Low threshold voltage
4.7
V


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