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ISO722MDR Datasheet(PDF) 1 Page - Texas Instruments

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Part # ISO722MDR
Description  Single Channel High-Speed Digital Isolators
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

ISO722MDR Datasheet(HTML) 1 Page - Texas Instruments

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OUT
GND2
GND1
IN
VCC2
VCC1
Isolation
Capacitor
EN (ISO722/M-only)
Product
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Reference
Design
ISO721, ISO721M, ISO722, ISO722M
SLLS629L – JANUARY 2006 – REVISED OCTOBER 2015
ISO72x Single Channel High-Speed Digital Isolators
If this dc-refresh pulse is not received for more than 4
1 Features
μs, the input is assumed to be unpowered or not
1
100 and 150-Mbps Signaling Rate Options
being actively driven, and the failsafe circuit drives
Low Propagation Delay
the output to a logic-high state.
Low Pulse Skew
The symmetry of the dielectric and capacitor within
Low-Power Sleep Mode
the integrated circuitry provides for close capacitive
matching, and allows fast transient voltage changes
High Electromagnetic Immunity
between the input and output grounds without
Low Input-Current Requirement
corrupting the output. The small capacitance and
Failsafe Output
resulting time constant provide for fast operation with
signaling rates from 0 Mbps (DC) to 100 Mbps for the
Drop-In Replacement for Most Opto and Magnetic
ISO721 and the ISO722 devices, and 0 Mbps to 150
Isolators
Mbps with the ISO721M and the ISO722M devices.
Operates from 3.3 V and 5 V Supplies
These devices require two supply voltages of 3.3 V, 5
-40°C to 125°C Operating Temperature Range
V, or any combination. All inputs are 5-V tolerant
50 kV/µs Transient Immunity, Typical
when supplied from a 3.3-V supply and all outputs
Safety and Regulatory Approvals
are 4 mA CMOS.
VDE Basic Insulation with 4000-VPK VIOTM, 560
The ISO722 and ISO722M devices include an active-
VPK VIORM
low output enable that when driven to a high logic
2500 VRMS Isolation per UL 1577
level, places the output in a high-impedance state
and turns off internal bias circuitry to conserve power.
CSA Approved for Component Acceptance
Notice 5A and IEC 60950-1
Both the ISO721 and ISO722 devices have TTL input
thresholds and a noise filter at the input that prevent
2 Applications
transient pulses of up to 2 ns in duration from being
passed to the output of the device.
Industrial Fieldbus
The ISO721M and ISO722M devices have CMOS
Modbus
VCC / 2 input thresholds, but do not have the noise-
Profibus
filter and the additional propagation delay. These
DeviceNet™ Data Buses
features of the ISO721M device also provide for
reduced-jitter operation.
Smart Distributed Systems (SDS™)
Computer Peripheral Interface
The ISO721, ISO721M, ISO722, and ISO722M
devices are characterized for operation over the
Servo Control Interface
ambient temperature range of –40°C to 125°C.
Data Acquisition
Device Information(1)
3 Description
PART NUMBER
PACKAGE
BODY SIZE (NOM)
The ISO721, ISO721M, ISO722, and ISO722M are
ISO721
SOP (8)
9.50mm x 6.57mm
digital isolators with a logic input and output buffer
ISO721
separated by a silicon dioxide (SiO2) insulation
ISO721M
barrier. This barrier provides galvanic isolation of up
SOIC (8)
4.90mm x 3.91mm
to 4000 VPK per VDE. Used in conjunction with
ISO722
isolated power supplies, these devices prevent noise
ISO722M
currents on a data bus or other circuits from entering
(1) For all available packages, see the orderable addendum at
the local ground, and interfering with or damaging
the end of the datasheet.
sensitive circuitry.
A binary input signal is conditioned, translated to a
Simplified Schematic
balanced signal, then differentiated by the capacitive
isolation barrier. Across the isolation barrier, a
differential comparator receives the logic transition
information, then sets or resets a flip-flop and the
output circuit accordingly. A periodic update pulse is
sent across the barrier to ensure the proper dc level
of the output.
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. PRODUCTION DATA.


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