Datasheet

ADS7863
www.ti.com SBAS383E –JUNE 2007–REVISED JANUARY 2011
ELECTRICAL CHARACTERISTICS (continued)
At T
A
= –40°C to +125°C, entire power-supply range, V
REF
= 2.5V (internal), f
CLK
= 32MHz, and t
DATA
= 2MSPS, unless
otherwise noted.
ADS7863
PARAMETER TEST CONDITIONS MIN TYP
(1)
MAX UNIT
INTERNAL VOLTAGE REFERENCE, continued
PSRR Power-supply rejection ratio 73 dB
I
REFOUT
Reference output dc current –2 +2 mA
I
REFSC
Reference output short-circuit current
(2)
50 mA
t
REFON
Reference output settling time 0.5 ms
VOLTAGE REFERENCE INPUT
V
REF
Reference input voltage range 0.5 2.525 V
I
REF
Reference input current 50 mA
C
REF
Reference input capacitance 10 pF
DIGITAL INPUTS
Logic family CMOS with Schmitt-Trigger
V
IH
High-level input voltage 0.7 × BV
DD
BV
DD
+ 0.3 V
V
IL
Low-level input voltage –0.3 0.3 × BV
DD
V
I
IN
Input current V
IN
= BV
DD
to BGND –50 +50 nA
C
IN
Input capacitance 5 pF
DIGITAL OUTPUTS
Logic family CMOS
V
OH
High-level output voltage BV
DD
= 4.5V, I
OH
= –100mA BV
DD
– 0.2 V
V
OL
Low-level output voltage BV
DD
= 4.5V, I
OH
= 100mA 0.2 V
I
OZ
High-impedance-state output current –50 +50 nA
C
OUT
Output capacitance 5 pF
C
LOAD
Load capacitance 30 pF
POWER SUPPLY
AV
DD
Analog supply voltage AV
DD
to AGND 2.7 5.0 5.5 V
BV
DD
Buffer I/O supply voltage BV
DD
to BGND 2.7 3.0 5.5 V
AV
DD
= 2.7V 4.5 6
AV
DD
= 5.0V 6.5 8
AV
DD
= 2.7V, NAP power-down 1.1 1.5
AI
DD
Analog supply current mA
AV
DD
= 5.0V, NAP power-down 1.4 2.0
AV
DD
= 2.7V, deep power-down 0.001
AV
DD
= 5.0V, deep power-down 0.001
BV
DD
= 2.7V, C
LOAD
= 10pF 0.5 1.3
BI
DD
Buffer I/O supply current mA
BV
DD
= 3.3V, C
LOAD
= 10pF 0.9 1.6
AV
DD
= 2.7V, BV
DD
= 2.7V 13.5 19.7
P
DISS
Power dissipation mW
AV
DD
= 5.0V, BV
DD
= 3.3V 35.5 45.3
(2) Reference output current is not limited internally.
Copyright © 2007–2011, Texas Instruments Incorporated Submit Documentation Feedback 5
Product Folder Link(s): ADS7863