Datasheet

AD7294 Data Sheet
Rev. H | Page 4 of 48
FUNCTIONAL BLOCK DIAGRAM
05747-001
LIMIT
REGISTERS
MUX
CONTROL LOGIC
I
2
C INTERFACE
PROTOCOL
TEMP
SENSOR
HIGH SIDE
CURRENT
SENSE
HIGH SIDE
CURRENT
SENSE
REF
OUT
/
REF
IN
DAC
T1 T2
TO LOAD
RS1(+) RS2(+) RS2(–)RS1(–)
D1+
D2+
D1–
D2–
AV
DD
(1 TO 6)
AGND
(1 TO 7)
DAC OUT
V+ AB/CD
AD7294
REF
OUT
/
REF
IN
ADC
V
PP
(1 TO 2)
ALERT/
BUSY
DCAP
V
REF
10.41
I
SENSE
1
OVERRANGE
I
SENSE
2
OVERRANGE
R
SENSE
12-BIT
ADC
AS0
AS1
AS2
SCL
SDA
DV
DD
DGND
(1 TO 2)
V
IN
0
V
IN
1
V
IN
2
V
IN
3
12-BIT
DAC
100kΩ
200kΩ
100kΩ 200kΩ
12-BIT
DAC
100kΩ 200kΩ
100kΩ 200kΩ
12-BIT
DAC
100kΩ
200kΩ
100kΩ 200kΩ
12-BIT
DAC
100kΩ 200kΩ
100kΩ 200kΩ
OFFSET IN A
V
OUT
B
OFFSET IN B
V
OUT
C
OFFSET IN C
V
OUT
D
OFFSET IN D
V
OUT
A
2.5V
REF
Figure 1.