ABSOLUTE MAXIMUM RATINGS
(1)
Analog Inputs to AGND, Any Channel Input ........ –0.3V to (+V
D
+ 0.3V)
REF
IN
..................................................................... –0.3V to (+V
D
+ 0.3V)
Digital Inputs to DGND .......................................... –0.3V to (+V
D
+ 0.3V)
Ground Voltage Differences: AGND, DGND ...................................
±0.3V
+V
D
to AGND ......................... –0.3V to +6V
Power Dissipation .......................................................................... 325mW
Maximum Junction Temperature ................................................... +150°C
Operating Temperature Range ...................................... –40°C to +125°C
Storage Temperature Range ......................................... –65°C to +150°C
NOTE: (1) Stresses above these ratings may cause permanent damage.
Exposure to absolute maximum conditions for extended periods may degrade
device reliability.
ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Texas Instruments
recommends that all integrated circuits be handled with appropriate
precautions. Failure to observe proper handling and installation proce-
dures can cause damage.
ESD damage can range from subtle performance degradation to
complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could
cause the device not to meet its published specifications.
PACKAGE/ORDERING INFORMATION
For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see
the TI website at www.ti.com.
TRUTH TABLE
M0
0
0
0
0
1
1
M1
0
0
1
1
0
1
A0
0
1
0
1
X
X
TWO-CHANNEL/FOUR-CHANNEL OPERATION
Two Channel
Two Channel
Two Channel
Two Channel
Four Channel
Four Channel
DATA ON SERIAL OUTPUTS
A and B
A and B
A Only
A Only
A and B
A Only
CHANNELS CONVERTED
A0, B0
A1, B1
A0, B0
A1, B1
Sequential
Sequential
X = Don’t Care.
BASIC CIRCUIT CONFIGURATION
ADS7861
1
2
3
4
5
6
7
8
9
DGND
CH B1+
CH B1–
CH B0+
CH B0–
CH A1+
CH A1–
CH A0+
CH A0–
+V
D
24
SERIAL DATA A 23
SERIAL DATA B 22
BUSY 21
CLOCK 20
CS 19
RD 18
CONVST 17
A0 16
M0 15
M1 14
+V
A
13
+
+
BUSY Output
Clock Input
Chip Select
Read Input
Conversion Start
A0 Address Select
M0 Address Select
M1 Address Select
+5V Analog Supply
0.1µF
10 REF
IN
11 REF
OUT
12 AGND
10µF
2
ADS7861
SBAS110D
TI [ TEXAS INSTRUMENTS ]
