5V, Rail-Rail I/O, Zero-Drift, Programmable Gain
Instrumentation Amplifiers
ISL28533, ISL28534, ISL28535, ISL28633, ISL28634, ISL28635
The ISL28533, ISL28534, ISL28535, ISL28633, ISL28634,
and ISL28635 are 5V Zero-Drift Rail-to-Rail Input/Output
Programmable Gain Instrumentation Amplifiers (PGIA). These
instrumentation amplifiers feature low offset, low noise, low
gain error and high CMRR. They are ideal for high precision
applications over the wide industrial temperature range.
Features
• Ultra high precision front end amplifier
• Zero drift instrumentation amplifier
• Pin selectable 9 gain settings: G = 1 to 1,000
• Rail-to-Rail input/output
These Instrumentation Amplifiers are designed with a unique
2-bit, 3-state logic interface that allows up to 9 selectable gain
settings. The ISL2853x single-ended output includes and
additional uncommitted zero-drift amplifier, useful to buffer
the REF input or used as a precision amplifier. The ISL2863x
differential output amplifier includes a reference pin to set the
common mode output voltage to interface with differential
input ADCs.
• Single ended output (ISL28533, ISL28534, ISL28535)
• Differential output (ISL28633, ISL28634, ISL28635)
• RFI filtered inputs improve EMI rejection
• Single supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5V to 5.5V
• Dual supply . . . . . . . . . . . . . . . . . . . . . . . . . ±1.25V to ±2.75V
• Low input offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5µV, Max
• Low input offset drift . . . . . . . . . . . . . . . . . . . . . 50nV/°C, Max
• High CMRR . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138dB, G = 100
• Low gain error. . . . . . . . . . . . . . . . . . . . . <0.4%, All Gains, Max
• Gain bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3MHz
Applications
• Pressure and strain gauge transducers
• Weight scales
• Flow sensors
• Input voltage noise (0.1Hz to 10Hz). . . . . . . . . . . . . . 0.4µV
P-P
• Biometric: ECG/blood glucose
• Temperature sensors
• Operating temperature range. . . . . . . . . . . .-40°C to +125°C
Related Literature
• Test and measurement
• Data acquisition systems
• Low ohmic current sense
• “ISLRE-BDGSTKEV1Z DAQ on a Stick User’s Guide” AN1853
• “ISL28533-633EV2Z User’s Guide” AN1880
INA-
20kΩ
INA-
20kΩ
+
-
20kΩ
20kΩ
+
-
A1
A1
-
OUTA-
1MΩ
A3
R
R
R
R
G
G
G
+
VA-
VA-
-
OUTA
-
VA+
VA+
A3
REF
1MΩ
+
+
G
+
A4
-
-
20kΩ
20kΩ
OUTA+
REF
OUT
A2
-
INA+
20kΩ
20kΩ
+
A2
INA+
+
9 GAIN
CONTROL
9 GAIN
CONTROL
IN-
-
G0
G1
G0
G1
A4
IN+
+
FIGURE 1. ISL2853x SINGLE-ENDED OUTPUT
FIGURE 2. ISL2863x DIFFERENTIAL OUTPUT
September 24, 2013
FN8364.0
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
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