ISL28533 Datasheet, PDF (4/30 Pages) Intersil Corporation – 5V, Rail-Rail I/O, Zero-Drift, Programmable Gain Instrumentation Amplifiers

ISL28533, ISL28534, ISL28535, ISL28633, ISL28634, ISL28635
Typical Sensor Application Block Diagram, ISL28533 Single-Ended
Output
V_CC
+5V
OUT+
SENSOR
OUT-
ISL28134
-
+
COMMON
MODE
SENSE
10kΩ
V_CM
10kΩ
V+
INA-
+
A1
-
R_G
VA-
VA+
R_G
-
INA+ ^A2
+
V-
ISL21090
5V V_REF
ISL28533
20kΩ 20kΩ
REF+
-
A3
OUTA ^IN
ISL26320
12-bit ADC
+
20kΩ 20kΩ
REF
OUT
IN-
-
A4
+
IN+
V_CC
ISL21090
2.5V V_REF
FIGURE 3. SENSOR APPLICATION WITH COMMON MODE SENSING AND BUFFERED REFERENCE DRIVE
Typical Bridge Sensor Application Block Diagram, ISL28634
Differential Output
*See ISLRE-BDGSTKEV1Z DAQ on a Stick User’s Guide” AN1853
+5V
350^Ω
350_Ω
FOIL STRAIN
S
GAUGE
S
350^Ω
ISL23328
DCP
Gain Control
ISL28634
+
-
50Ω
50Ω
+
-
VA+
ISL28233
+
-
VA-
ISL26104
24-BIT ADC
Ch 1
Ch 2
Ch 3
Ch 4
TO GUI
Renesas
MICROCONTROLLER
ISL21010
5V VREF
R5F10JBC (RL78/G1C)
FIGURE 4. SIMPLIFIED STRAIN GAUGE SCHEMATIC
4
FN8364.0
September 24, 2013