DATASHEET
ISL28533, ISL28534, ISL28535, ISL28633, ISL28634, ISL28635
5V, Rail-to-Rail I/O, Zero-Drift, Programmable Gain Instrumentation Amplifiers
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.
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.
FN8364
Rev.2.00
Jan 13, 2017
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
• 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
• Input voltage noise (0.1Hz to 10Hz). . . . . . . . . . . . . . 0.4µV
P-P
• Operating temperature range. . . . . . . . . . . .-40°C to +125°C
Applications
•
•
•
•
•
•
•
•
Pressure and strain gauge transducers
Weight scales
Flow sensors
Biometric: ECG/blood glucose
Temperature sensors
Test and measurement
Data acquisition systems
Low ohmic current sense
Related Literature
•
AN1880
“ISL2853x_63xEV2Z User's Guide”
TABLE 1. KEY DIFFERENCES BETWEEN FAMILY OF PARTS
PART NUMBER
ISL28533/34/35
ISL28633/34/35
OUTPUT
Single-ended
Differential
ADDITIONAL UNCOMMITTED
OP AMP
Yes
No
INA-
INA-
+
-
R
G
20kΩ
A1
20kΩ
+
-
20kΩ
A1
20kΩ
R
G
-
A3
OUTA
VA-
VA+
R
G
A3
+
-
+
+
A4
20kΩ
-
OUTA-
1MΩ
REF
1MΩ
OUTA+
VA-
VA+
R
G
-
INA+
A2
+
9 GAIN
CONTROL
G0
G1
20kΩ
+
-
OUT
-
A4
+
IN-
IN+
G0
G1
INA+
A2
+
20kΩ
9 GAIN
CONTROL
FIGURE 1. ISL2853x SINGLE-ENDED OUTPUT
FIGURE 2. ISL2863x DIFFERENTIAL OUTPUT
FN8364 Rev.2.00
Jan 13, 2017
-
20kΩ
REF
Page 1 of 30
ISL28533, ISL28534, ISL28535, ISL28633, ISL28634, ISL28635
Table of Contents
Pin Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Typical Sensor Application Block Diagram, ISL28533 Single-Ended Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Typical Bridge Sensor Application Block Diagram, ISL28634 Differential Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
G0 and G1 Programmable Gain Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Thermal Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Operating Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Typical Instrumentation Amplifier Performance Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Typical Operational Amplifier Performance Curves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Applications Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Precision Sensor Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Single-Ended Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Differential Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RFI Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gain Stage Output VA+/VA- Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Programmable Gain Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gain Setting with DCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gain Switching Delay Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dual Supply Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Supply and REF Pin Sequencing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Common-Mode Input Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
25
25
25
25
25
25
26
26
27
27
27
27
Application Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Sensor Health Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Active Shield Guard Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
About Intersil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Package Outline Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
FN8364 Rev.2.00
Jan 13, 2017
Page 2 of 30
ISL28533, ISL28534, ISL28535, ISL28633, ISL28634, ISL28635
Pin Configurations
ISL28533, ISL28534, ISL28535 SINGLE-ENDED OUTPUT
(14 LD TSSOP)
TOP VIEW
G0 1
G1
VA-
2
+
3
14
13
12
-
11
10
+ -
9
8
V+
DNC
OUTA
REF
OUT
IN-
IN+
ISL28633, ISL28634, ISL28635 DIFFERENTIAL OUTPUT
(14 LD TSSOP)
TOP VIEW
G0 1
G1
VA-
2
3
+
14
13
12
11
10
9
8
V+
DNC
OUTA+
REF
OUTA-
N.C.
N.C.
INA+ 4
INA-
VA+
V-
5
6
7
INA+ 4
INA-
VA+
V-
5
6
7
-
Pin Descriptions
ISL28633
ISL28533
ISL28634
ISL28534
ISL28635
ISL28535
(SINGLE-ENDED OUTPUT) (DIFFERENTIAL OUTPUT)
4
5
12
-
-
6
3
11
1
2
8
9
10
14
7
-
13
INA+,
INA-,
IN+,
IN-
V-
V-
V-
V+
PIN
NAME
INA+
INA-
OUTA
OUTA+
OUTA-
VA+
VA-
REF
G0
G1
IN+
IN-
OUT
V+
V-
N.C.
DNC
EQUIVALENT
CIRCUIT
Circuit 1
Circuit 1
Circuit 2
Circuit 2
Circuit 2
Circuit 1
Circuit 1
Circuit 1
Circuit 1
Circuit 1
Circuit 1
Circuit 1
Circuit 2
Circuit 3
Circuit 3
FUNCTION
INA+ Input
INA- Input
INA Output
INA +Output
INA -Output
A2 Output
A1 Output
Output Reference
Gain Control Logic Input
Gain Control Logic Input
Non-Inverting Op Amp Input
Inverting Op Amp Input
Op Amp Output
Positive supply
Negative supply
No Connect
Do Not Connect
V+
COMMENTS
Positive Differential Input
Negative Differential Input
Single Ended Output
Positive Differential Output
Negative Differential Output
INA Gain Stage +Output
INA Gain Stage -Output
INA Output Reference
4
5
-
12
10
6
3
11
1
2
-
-
-
14
7
8, 9
13
Auxiliary Amplifier IN+
Auxiliary Amplifier IN-
Auxiliary Amplifier OUT
Single Supply: +2.5V to +5.5V
Dual Supply: ±1.25V to ±2.75V
Pin must float
V+
OUT
CAPACITIVELY
COUPLED
ESD CLAMP
CIRCUIT 1
CIRCUIT 2
CIRCUIT 3
FN8364 Rev.2.00
Jan 13, 2017
Page 3 of 30
ISL28533, ISL28534, ISL28535, ISL28633, ISL28634, ISL28635
Typical Sensor Application Block Diagram, ISL28533 Single-Ended
Output
+5V
V
CC
ISL21090
5V V
REF
OUT+
SENSOR
OUT-
INA-
V+
ISL28533
+
A1
-
R
G
20kΩ
20kΩ
REF+
ISL28134
-
+
10kΩ
V
CM
VA-
VA+
R
G
-
INA+
A2
+
20kΩ
COMMON
MODE
SENSE
10kΩ
-
A3
+
OUTA
IN
ISL26320
12-bit ADC
20kΩ
REF
OUT
-
A4
+
IN-
IN+
ISL21090
2.5V V
REF
V
CC
V-
FIGURE 3. SENSOR APPLICATION WITH COMMON-MODE SENSING AND BUFFERED REFERENCE DRIVE
Typical Bridge Sensor Application Block Diagram, ISL28634
Differential Output
ISL23328
DCP
Gain Control
+5V
ISL26104
24-BIT ADC
Ch 1
Ch 2
35
0Ω
S
FOIL STRAIN
GAUGE
S
ISL28634
50Ω
TO GUI
Ch 3
Ch 4
+
0Ω
-
+
-
50Ω
Renesas
MICROCONTROLLER
35
FN8364 Rev.2.00
Jan 13, 2017
35
0Ω
VA+
ISL28233
VA-
ISL21010
5V VREF
R5F10JBC (RL78/G1C)
+
-
FIGURE 4. SIMPLIFIED STRAIN GAUGE SCHEMATIC
Page 4 of 30
ISL28533, ISL28534, ISL28535, ISL28633, ISL28634, ISL28635
G0 and G1 Programmable Gain Setting
G1
(NOTE)
0
0
0
Z
Z
Z
1
1
1
G0
(NOTE)
0
Z
1
0
Z
1
0
Z
1
ISL28533
ISL28633
1
2
4
5
10
20
40
50
100
Medical
Piezo-Electric
Pressure Sensor
Fluid Sensor
ISL28534
ISL28634
1
2
10
50
100
200
300
500
1000
Shunt Sense
Optical Sensors
Strain Gauge
Thermocouple
ISL28535
ISL28635
1
100
120
150
180
200
300
500
1000
Strain Gauge
APPLICATIONS
NOTE: For valid logic “Z” state leave G0/G1 pins in high impedance state. Internal 100kΩ pull-up and pull-down resistors on these pins establishes
logic “Z”. See
“Applications Information” on page 25
for more information.
Ordering Information
PART NUMBER
(Notes
1, 2, 3)
ISL28533FVZ
ISL28534FVZ
ISL28535FVZ
ISL28633FVZ
ISL28634FVZ
ISL28635FVZ
ISL28533EV2Z
ISL28534EV2Z
ISL28535EV2Z
ISL28633EV2Z
ISL28634EV2Z
ISL28635EV2Z
NOTES:
1. Add “-T13” suffix for 2.5k unit or “-T7A” suffix for 250 unit Tape and Reel options. Please refer to
TB347
for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate
plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil Pb-free products are
MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
3. For Moisture Sensitivity Level (MSL), please see device information page for
ISL28533, ISL28534, ISL28535, ISL28633, ISL28634, ISL28635.
For
more information on MSL please see tech brief
TB363.
PART
MARKING
28533 FVZ
28534 FVZ
28535 FVZ
28633 FVZ
28634 FVZ
28635 FVZ
ISL28533 Evaluation Board
ISL28534 Evaluation Board
ISL28535 Evaluation Board
ISL28633 Evaluation Board
ISL28634 Evaluation Board
ISL28635 Evaluation Board
TEMP RANGE
(°C)
-40 to +125
-40 to +125
-40 to +125
-40 to +125
-40 to +125
-40 to +125
PACKAGE
(RoHS Compliant)
14 Ld TSSOP
14 Ld TSSOP
14 Ld TSSOP
14 Ld TSSOP
14 Ld TSSOP
14 Ld TSSOP
M14.173
M14.173
M14.173
M14.173
M14.173
M14.173
PKG.
DWG. #
FN8364 Rev.2.00
Jan 13, 2017
Page 5 of 30
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