Datasheet

ADS8556
ADS8557
ADS8558
SBAS404B –OCTOBER 2006– REVISED JANUARY 2012 www.ti.com
ELECTRICAL CHARACTERISTICS: GENERAL (continued)
Over recommended operating free-air temperature range of –40°C to +125°C, AVDD = 4.5V to 5.5V, BVDD = 2.7V to 5.5V,
HVDD = 10V to 15V, HVSS = –15V to –10V, V
REF
= 2.5V (internal), and f
DATA
= maximum, unless otherwise noted.
ADS8556, ADS8557, ADS8558
PARAMETER CONDITIONS MIN TYP
(1)
MAX UNIT
DIGITAL OUTPUTS
(4)
Logic family CMOS
High-level output voltage I
OH
= 100μA BVDD – 0.6 BVDD V
Low-level output voltage I
OH
= –100μA BGND BGND + 0.4 V
High-impedance-state output current –50 50 nA
Output capacitance 5 pF
Load capacitance 30 pF
POWER-SUPPLY REQUIREMENTS
Analog supply voltage AVDD 4.5 5.0 5.5 V
Buffer I/O supply voltage BVDD 2.7 3.0 5.5 V
Input positive supply voltage HVDD 5.0 10.0 16.5 V
Input negative supply voltage HVSS –16.5 –10.0 –5.0 V
f
DATA
= maximum 30.0 36.0 mA
ADS8556, f
DATA
= 250kSPS (auto-NAP mode) 14.0 16.5 mA
ADS8557, f
DATA
= 250kSPS (auto-NAP mode) 14.0 17.0 mA
Analog supply current
(5)
IAVDD
ADS8558, f
DATA
= 250kSPS (auto-NAP mode) 14.0 18.0 mA
Auto-NAP mode, no ongoing conversion,
4.0 6.0 mA
internal conversion clock
Power-down mode 0.1 50.0 μA
f
DATA
= maximum 0.9 2.0 mA
f
DATA
= 250kSPS (auto-NAP mode) 0.5 1.5 mA
Buffer I/O supply current
(6)
IBVDD
Auto-NAP mode, no ongoing conversion,
0.1 10.0 μA
internal conversion clock
Power-down mode 0.1 10.0 μA
ADS8556, f
DATA
= maximum 3.0 3.5 mA
ADS8557, f
DATA
= maximum 3.1 3.6 mA
ADS8558, f
DATA
= maximum 3.3 4.0 mA
Input positive supply current
(7)
IHVDD
f
DATA
= 250kSPS (auto-NAP mode) 1.6 2.0 mA
Auto-NAP mode, no ongoing conversion,
0.2 0.3 μA
internal conversion clock
Power-down mode 0.1 10.0 μA
ADS8556, f
DATA
= maximum 3.6 4.0 mA
ADS8557, f
DATA
= maximum 3.6 4.2 mA
ADS8558, f
DATA
= maximum 4.0 4.8 mA
Input negative supply current
(8)
IHVSS
f
DATA
= 250kSPS (auto-NAP mode) 1.8 2.2 mA
Auto-NAP mode, no ongoing conversion,
0.2 0.25 μA
internal conversion clock
Power-down mode 0.1 10.0 μA
(4) Specified by design.
(5) At AVDD = 5V.
(6) At BVDD = 3V, parallel mode, load capacitance = 6pF/pin.
(7) At HVDD = 15V.
(8) At HVSS = –15V.
8 Copyright © 2006–2012, Texas Instruments Incorporated