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ADS8331 View Datasheet(PDF) - Texas Instruments

Part NameDescriptionManufacturer
ADS8331 2.7V~5.5V, 16 Bit 500KSPS Low Power Serial ADC / Low-Power, 16-Bit, 500kSPS, 4-/8-Channel Unipolar Input TI
Texas Instruments TI
ADS8331 Datasheet PDF : 39 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
ADS8331
ADS8332
SBAS363 – DECEMBER 2009
www.ti.com
ELECTRICAL CHARACTERISTICS: VA = 2.7V (continued)
At TA = –40°C to +85°C, VA = 2.7V, VBD = 1.65V to 2.7V, VREF = 2.5V, and fSAMPLE = 500kSPS, unless otherwise noted.
ADS8331I, ADS8332I
ADS8331IB, ADS8332IB
PARAMETER
TEST CONDITIONS
MIN TYP
MAX
MIN TYP
MAX UNIT
CLOCK
Internal conversion clock
frequency
10.5 11
12.2
10.5 11
12.2 MHz
Used as I/O clock only
SCLK external serial clock
Used as both I/O clock and
conversion clock
1
25
21
1
25 MHz
21 MHz
EXTERNAL VOLTAGE REFERENCE INPUT
VREF
Input
reference
range (5)
(REF+) – (REF–)
(REF–) – AGND
Resistance (6)
Reference input
1.2
–0.1
20
2.525
0.1
1.2
–0.1
20
2.525
V
0.1
V
k
DIGITAL INPUT/OUTPUT
Logic family
CMOS
CMOS
VIH
High-level input voltage
VA VBD 1.65V
0.65 ×
(VBD)
VBD + 0.3
0.65 ×
(VBD)
VBD + 0.3
V
VIL
Low-level input voltage
VA VBD 1.65V
–0.3
0.25 ×
(VBD)
–0.3
0.25 ×
(VBD)
V
II
Input current
CI
Input capacitance
VOH
High-level output voltage
VOL
Low-level output voltage
CO
SDO pin capacitance
CL
Load capacitance
Data format
VIN = VBD or DGND
VA VBD 1.65V,
IO = 100μA
VA VBD 1.65V,
IO = –100μA
Hi-Z state
–50
5
VBD – 0.6
0
5
Straight binary
50
–50
5
VBD VBD – 0.6
0.4
0
5
30
Straight binary
50 nA
pF
VBD
V
0.4
V
pF
30 pF
POWER-SUPPLY REQUIREMENTS
VA
Analog supply voltage(5)
2.7
3.6
2.7
3.6
V
VBD
Digital I/O supply voltage
1.65
VA + 0.2
1.65
VA + 0.2
V
IA
Analog supply current
fSAMPLE = 500kSPS
fSAMPLE = 250kSPS in
Auto-Nap mode
Nap mode, SCLK = VBD or
DGND
5.2
6.5
3.2
325
400
5.2
6.5 mA
3.2
mA
325
400 μA
Deep PD mode, SCLK = VBD
or DGND
50
250
50
250 nA
IBD
Digital I/O supply current
fSAMPLE = 500kSPS
fSAMPLE = 250kSPS in
Auto-Nap mode
0.1
0.4
0.05
0.1
0.4 mA
0.05
mA
Power dissipation
VA = 2.7V, VBD = 1.65V,
fSAMPLE = 500kSPS
VA = 2.7V, VBD = 1.65V,
fSAMPLE = 250kSPS in
Auto-Nap mode
14.2
18.2
8.72
14.2
18.2 mW
8.72
mW
TEMPERATURE RANGE
TA
Operating free-air temperature
–40
+85
–40
+85 °C
(5) The ADS8331/32 operates with VA between 2.7V and 5.5V, and VREF between 1.2V and VA. However, the device may not meet the
specifications listed in the Electrical Characteristics when VA is between 3.6V and 4.5V.
(6) Can vary ±30%.
4
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Copyright © 2009, Texas Instruments Incorporated
Product Folder Link(s): ADS8331 ADS8332
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