ISO1211 Datasheet, PDF (1/28 Pages) Texas Instruments – Isolated 24-V Digital Input Receivers for Digital Input Modules

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ISO1211, ISO1212
SLLSEY7 – JUNE 2017
ISO121x Isolated 24-V Digital Input Receivers for Digital Input Modules
1 Features
•1 Compliant to IEC 61131-2; Type 1, 2, 3
Characteristics
• Accurate Current Limit: 2.2 mA to 2.47 mA
• Eliminates the Need for Secondary (Field-Side)
Power Supply
• Input Tolerance With Reverse Polarity Protection:
±60 V
• Compatible With High-Side or Low-Side Switches
• High Data Rates: Up to 4 Mbps
• High Transient Immunity: ±70-kV/µs CMTI
• Wide Control-Side Supply Voltage (V_CC1) Range:
2.25 V to 5.5 V
• Wide Ambient Temperature Range: –40°C to
+125°C
• Available Channel Options
– Single-Channel ISO1211, Narrow-Body
SOIC-8
– Dual-Channel ISO1212, SSOP-16
• Safety-Related Certifications:
– VDE V 0884-10 Basic Insulation
– UL 1577 Recognition, 2500-V_RMS Insulation
– CSA Component Acceptance Notice 5A and
IEC 60950-1 Certification
– CQC Certification per GB4943.1-2011
– TUV Certifications per EN 60950-1 and EN
601010-1
– All Certifications are Planned
2 Applications
• Programmable Logic Controller (PLC) Input
Modules
– Digital Input Modules
– Mixed I/O Modules
• Motor Drive I/O and Position Feedback
• CNC Control
• Data Acquisition
• Binary Input Modules
3 Description
The ISO1211 and ISO1212 are isolated 24-V digital
input receivers, compliant to IEC 61131-2 Type 1, 2,
and 3 characteristics, suitable for programmable logic
controllers (PLCs) and motor-control digital input
modules. Unlike traditional optocoupler solutions with
discrete, imprecise current limiting circuitry, the
ISO121x devices provide a simple, low-power
solution with an accurate current limit to enable the
design of compact and high-density I/O modules.
These devices do not require field-side power supply
and are compatible with high-side or low-side
switches.
The ISO121x devices operate over the supply range
of 2.25 V to 5.5 V, supporting 2.5-V, 3.3-V, and 5-V
controllers. A ±60-V input tolerance with reverse
polarity protection helps ensure the input pins are
protected in case of faults with negligible reverse
current. These devices support up to 4-Mbps data
rates passing a minimum pulse width of 150 ns for
high-speed operation. The ISO1211 device is ideal
for designs that require channel-to-channel isolation
and the ISO1212 device is ideal for multichannel
space-constrained designs.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
ISO1211
SOIC (8)
4.90 mm × 3.91 mm
ISO1212
SSOP (16)
4.90 mm × 3.90 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Application Diagram
Field
24 V
Power
Supply
0V
Sensor
Switch
PLC Digital Input Module
RTHR
ISO1211
RSENSE
SENSE
IN
VCC1
OUT
FGND
GND1
PLC
VCC
Host
Controller
GND
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. ADVANCE INFORMATION for pre-production products; subject to
change without notice.