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ADS8681 Datasheet(PDF) 8 Page - Texas Instruments

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Part # ADS8681
Description  16-Bit, High-Speed, Single-Supply, SAR ADC Data Acquisition System with Programmable, Bipolar Input Ranges
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

ADS8681 Datasheet(HTML) 8 Page - Texas Instruments

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ADS8681, ADS8685, ADS8689
SBAS633B – FEBRUARY 2016 – REVISED DECEMBER 2016
www.ti.com
Product Folder Links: ADS8681 ADS8685 ADS8689
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
SAMPLING DYNAMICS
tCONV
Conversion time
ADS8681
665
ns
ADS8685
1000
ADS8689
5000
tACQ
Acquisition time
ADS8681
335
ns
ADS8685
1000
ADS8689
5000
fcycle
Maximum throughput rate
without latency
ADS8681
1000
kSPS
ADS8685
500
ADS8689
100
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
7
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
POWER-SUPPLY REQUIREMENTS
AVDD
Analog power-supply voltage
4.75
5
5.25
V
DVDD
Digital power-supply voltage
Operating range
1.65
3.3
AVDD
Supply range for specified performance
2.7
3.3
AVDD
IAVDD_DYN
Analog supply current,
device converting at maximum
throughput
Internal
reference
ADS8681
8.2
10.5
mA
ADS8685
5.6
7.25
ADS8689
4
5
External
reference
ADS8681
7.0
8.75
ADS8685
4.4
5.5
ADS8689
2.7
3.25
IAVDD_STC
Analog supply current,
device not converting
Internal
reference
ADS8681
4.7
6.25
mA
ADS8685, ADS8689
3.5
4.7
External
reference
ADS8681
3.5
4.5
ADS8685, ADS8689
2.3
3
IAVDD_STDBY
Analog supply current,
device in STANDBY mode
Internal reference
2.8
mA
External reference
1.6
IAVDD_PD
Analog supply current,
device in PD mode
Internal reference
10
μA
External reference
10
IDVDD_DYN
Digital supply current,
maximum throughput
0.2
0.25
mA
IDVDD_STDBY
Digital supply current,
device in STANDBY mode
1
μA
IDVDD_PD
Digital supply current,
device in PD mode
1
μA


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