DATASHEET
ISL28533, ISL28534, ISL28535, ISL28633, ISL28634, ISL28635
5V, Rail-to-Rail I/O, Zero-Drift, Programmable Gain Instrumentation Amplifiers
FN8364
Rev.2.00
Jan 13, 2017
The ISL28533, ISL28534, ISL28535, ISL28633, ISL28634, and
Features
ISL28635 are 5V zero-drift rail-to-rail input/output
• Ultra high precision front-end amplifier
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.
• 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 an
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, Maximum
• Low input offset drift . . . . . . . . . . . . . . . . 50nV/°C, Maximum
• High CMRR . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138dB, G = 100
• Low gain error. . . . . . . . . . . . . . . .<0.4%, All Gains, Maximum
• 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
• AN1880 “ISL2853x_63xEV2Z User's Guide”
• Test and measurement
• Data acquisition systems
• Low ohmic current sense
TABLE 1. KEY DIFFERENCES BETWEEN FAMILY OF PARTS
ADDITIONALUNCOMMITTED
PART NUMBER
ISL28533/34/35
ISL28633/34/35
OUTPUT
OP AMP
Single-ended
Differential
Yes
No
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
FN8364 Rev.2.00
Jan 13, 2017
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