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1
Introduction
1.1
Overview
1.2
Functional Configuration of the Dual-Channel Digital Isolator
1.3
The EVM Signal Paths of the ISO7220x and ISO7221x Isolators
1.4
The ISO7220x EVM Configuration
1.5
The ISO7221x EVM Configuration
2
EVM Setup and Operation
2.1
Overview
1
The ISO7220x and ISO7221x Pinouts
2
The ISO7220x Same-Channel Direction Schematic
3
The ISO7221x Opposing-Channel Direction Schematic
4
ISO7220x EVM, Top View
5
ISO7220x EVM, Bottom View
6
The ISO7221x EVM Top View
7
The ISO7221x EVM Bottom View
8
Basic EVM Operation
9
Typical Input and Output Waveforms
1
ISO7220x EVM Connections
2
ISO7221x EVM Connections
1
Introduction
This user's guide details the evaluation module (EVM) operation of the factory installed ISO7220M
dual-channel digital isolator. However, the EVM board may be reconfigured by a user for use with any of
the ISO7220x or ISO7221x dual-channel isolators.
The EVM may be reconfigured for use with the ISO7220A, ISO7220B and ISO7220C same-channel
direction isolators and the ISO7221A, ISO7221A, ISO7221C and ISO7221M opposing-channel direction
isolators.
This guide also explains the user configurable I/O loads for both dual-channel isolator EVM configurations,
and presents a typical lab setup with input and output waveforms.
SLLU098A – June 2007 – Revised July 2009
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Dual-Channel Digital Isolator EVM
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List of Figures
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List of Tables
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SLLU098A – June 2007 – Revised July 2009
Contents
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Dual-Channel Digital Isolator EVM
User's Guide
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Related Manuals for Texas Instruments ISO7220 Series
Summary of Contents for Texas Instruments ISO7220 Series
- Page 1 User's Guide SLLU098A – June 2007 – Revised July 2009 Dual-Channel Digital Isolator EVM Contents ........................Introduction ......................Overview ..........Functional Configuration of the Dual-Channel Digital Isolator ........... The EVM Signal Paths of the ISO7220x and ISO7221x Isolators ................The ISO7220x EVM Configuration ................
- Page 2 Introduction www.ti.com Overview The ISO7220x and ISO721x dual digital isolators have a logic input and output buffer separated by a silicon oxide (SiO ) insulation barrier. Used in conjunction with isolated power supplies, these devices block high voltage, isolate grounds, and prevent noise currents on a data bus or other circuits from entering the local ground and interfering with or damaging sensitive circuitry.
- Page 3 Introduction www.ti.com The EVM Signal Paths of the ISO7220x and ISO7221x Isolators This multifunctional EVM is designed with signal paths shown in Figure Figure 2, and Figure 3 for the evaluation of the ISO7220x and ISO7221x dual-channel isolators. (Banana Jack P1) (Banana Jack P2) INPUT OUTPUT...
- Page 4 Introduction www.ti.com (Banana Jack P1) (Banana Jack P2) OUTPUT INPUT data ISO7221x data 50 W OUTA OUTB data data INPUT OUTPUT 50 W GND1 (Banana Jack P3) GND2 (Banana Jack P4) Figure 3. The ISO7221x Opposing-Channel Direction Schematic Table 2. ISO7221x EVM Connections Connection Label Description...
- Page 5 Introduction www.ti.com The ISO7220x EVM Configuration The ISO7220x EVM configuration has SMA connectors (J1 and J3) set up as the input to the INA (pin 2) and INB (pin 3) of the ISO7220M in Figure 1 Figure 2. R2 and R8 are 0-Ω input series resistors shown in Figure 4, and are located next to the J1 and J3 input connectors.
- Page 6 Introduction www.ti.com The ISO7221x EVM Configuration The ISO7221x EVM configuration has SMA connectors (J4 and J1) set up as the input to the INA (pin 7) and INB (pin 3) of the ISO7221x in Figure 1 Figure 3. R2 and R6 are 0-Ω input series resistors shown Figure 6, and are located next to the J1 and J4 input connectors.
- Page 7 EVM Setup and Operation www.ti.com EVM Setup and Operation This section includes the setup and operation of the EVM for parameter performance evaluation. Typical waveforms are included. Overview The basic setup in Figure 5 has the two power supplies required to evaluate isolator performance with 3.3-V on one side and 5-V on the other.
- Page 8 EVALUATION BOARD/KIT IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards.
- Page 9 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.
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