ISO7520C Datasheet, PDF (1/18 Pages) Texas Instruments – Low-Power 5 KV(rms) Dual Digital Isolators

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ISO7520C
ISO7521C
SLLSE39C – JUNE 2010 – REVISED DECEMBER 2011
Low-Power 5 KV(rms) Dual Digital Isolators
Check for Samples: ISO7520C, ISO7521C
FEATURES
1
• Highest Signaling Rate: 1 Mbps
• Propagation Delay Less Than 20 ns
• Low Power Consumption
• Wide Ambient Temperature: –40°C to 105°C
• Safety and Regulatory Approvals
– UL 1577 Approved with 4243 Vrms Rating
– CSA CA Notice 5A, IEC 60747-5-2,
IEC 60601-1, 60950-1, and 61010-1
Approved
• 50 kV/µs Transient Immunity Typical
• Operates From 3.3V or 5V Supply and Logic
Levels
APPLICATIONS
• Opto-Coupler Replacement in:
– Medical Applications for IEC 60601-1
(5 KVrms Rated)
– Industrial Field-Bus
– ProfiBus
– ModBus
– DeviceNetTM Data Buses
– Servo Control Interface
– Motor Control
– Power Supply
– Battery Packs
The devices have TTL input thresholds and require
two supply voltages, 3.3V or 5V, or any combination.
All inputs are 5-V tolerant when supplied from a 3.3-V
supply.
Note: The ISO7520C and ISO7521C are specified for
signaling rates up to 1 Mbps. Due to their fast
response time, under most cases, these devices will
also transmit data with much shorter pulse widths.
Designers should add external filtering to remove
spurious signals with input pulse duration < 20 ns if
desired.
GND 1
NC
VCC 1
INA
INB
NC
GND 1
NC
ISO7520C
1
16
2
15
3
14
4
13
5
12
6
11
7
10
8
9
GND 2
NC
VCC 2
OUTA
OUTB
NC
NC
GND 2
ISO7521C
GND 1 1
16
NC 2
15
VCC 1 3
14
OUTA 4
13
INB 5
12
NC 6
11
GND 1 7
10
NC ⁸
9
NC = No Internal Connection
GND 2
NC
VCC 2
INA
OUTB
NC
NC
GND 2
DESCRIPTION
The ISO7520C and ISO7521C provide galvanic
isolation of up to 4243 Vrms for 1 minute per UL.
These devices are also certified to 5000 Vrms
reinforced insulation per end equipment standards
IEC 60950-1, 61010-1, and 60601-1. These digital
isolators have two isolated channels with
uni-directional (ISO7520C) and bi-directional
(ISO7521C) channel configurations. Each isolation
channel has a logic input and output buffer separated
by a silicon oxide (SiO₂) insulation barrier. Used in
conjunction with isolated power supplies, these
devices prevent noise currents on a data bus or other
circuits from entering the local ground and interfering
with or damaging sensitive circuitry.
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2010–2011, Texas Instruments Incorporated