Datasheet ISL32704E (Intersil) - 7

ISL32704E Safety and Approvals Application Information VDE V 0884-11 (Certification Pending) The ISL32704E is an isolated RS-485 transceiver designed for high-speed data transmission of up to 4Mbps. Basic Isolation Grade; File Number: Certifications pending • Working voltage (V RS-485 and Isolation IORM) 600VRMS (848VPK); basic insulation, pollution degree 2 RS-485 is a differential (balanced) data transmission standard for • Transient overvoltage (V use in long haul network or noisy environments. It is a true IOTM) 4000VPK multipoint standard, which allows up to 32 one-unit load devices • Each part tested at 1590VPK for 1s, 5pC partial discharge limit (any combination of drivers and receivers) on a bus. To allow for • Samples tested at 4000V multipoint operation, the RS-485 specification requires that PK for 60s, then 1358VPK for 10s with 5pC partial discharge limit drivers must handle bus contention without sustaining any damage. SYMBOL SAFETY-LIMITING VALUES VALUE UNIT An important advantage of RS-485 is its wide common-mode range, which specifies that the driver outputs and the receiver TS Safety Rating Ambient Temperature 180 °C inputs withstand signals ranging from +12V to -7V. This PS Safety Rating Power (180°C) 270 mW common-mode range is the sum of the ground potential difference between driver and receiver, V I 54 mA GPD, the driver output S Supply Current Safety Rating (total of supplies) common-mode offset, VOC, and the longitudinally coupled noise along the bus lines, Vn: VCM = VGPD + VOC + Vn. UL 1577
VCC1 VCC2
Basic Isolation Grade; Component Recognition Program File Number: E207481
VN
- Working voltage (VIORM) 600VRMS (848VPK); basic
D R D RT RT R
insulation, pollution degree 2 - Transient overvoltage (VIOTM) 4000VPK
VOC VCM
- Each part tested at 3000 VRMS (4243VPK) for 1s - Each lot samples tested at 2500 VRMS (3536VPK) for 60s
VGPD GND1 GND2
Electromagnetic Compatibility FIGURE 3. COMMON-MODE VOLTAGES IN A NON-ISOLATED DATA LINK The ISL32704E is fully compliant with generic EMC standards However, in networks using isolated transceivers, such as the EN50081, EN50082-1, and the umbrella line-voltage standard ISL32704E, the supply and signal paths of the driver and receiver for information technology equipment (ITE) EN61000. The bus circuits are galvanically isolated from their local mains isolator’s Wheatstone bridge configuration and differential supplies and signal sources. magnetic field signaling ensure excellent EMC performance against all relevant standards. Compliance tests have been conducted in the following categories:
VCC1 VCC2-ISO VCC2 VN
TABLE 1. COMPLIANCE TEST CATEGORIES
ISO
EN50081-1 EN50082-2 EN50204
D R D RT RT R
Residential, Industrial Environment Radiated field Commercial, EN61000-4-2 (ESD), from digital
VCM = 0V RISO
and Light EN61000-4-3 (Electromagnetic Field telephones
VOC VCM
Industrial: Immunity)
GND2-ISO
Methods EN61000-4-4 (EFT)
V
EN55022, EN61000-4-6 (RFI Immunity)
GPD GND1 GND2
EN55014 EN61000-4-8 (Power Frequency FIGURE 4. COMMON-MODE VOLTAGES IN AN ISOLATED DATA LINK Magnetic Field immunity) EN61000-4-9 (Pulsed Magnetic Because the ground potentials of isolated bus nodes are isolated Field) from each other, the common-mode voltage of one node’s output EN61000-4-10 (Damped Oscillatory has no effect on the bus inputs of another node. This is because Magnetic Field) the common-mode voltage is dropping across the Immunity to external magnetic fields high-resistance isolation barrier of 1014Ω. Thus, galvanic is even higher if the field direction is isolation extends the maximum allowable common-mode range “end-to-end” rather than “pin-to-pin” of a data link to the maximum working voltage of the isolation as shown on the right. barrier, which for the ISL32704E is 600VRMS. FN8860 Rev.3.00 Page 7 of 13 Mar 29, 2017 Document Outline Related Literature Features Applications Ordering Information Pin Configurations Truth Table Truth Table Pin Descriptions Typical Operating Circuits Absolute Maximum Ratings (Note 16) Thermal Information Recommended Operating Conditions Electrical Specifications Insulation Specifications Magnetic Field Immunity (Note 16) Safety and Approvals VDE V 0884-11 (Certification Pending) UL 1577 Electromagnetic Compatibility Application Information RS-485 and Isolation Digital Isolator Principle GMR Resistor in Detail Low Emissions Low EMI Susceptibility Receiver (Rx) Features Driver (Tx) Features Built-In Driver Overload Protection Dynamic Power Consumption Power Supply Decoupling DC Correctness Data Rate, Cables, and Terminations Transient Protection Pinout Differences Between Packages Revision History About Intersil Package Outline Drawing M16.15B M16.3A