Overview
The ISO1640BDR, produced by Texas Instruments, is a hot-swappable, low-power, bidirectional I2C isolator designed to provide robust isolation and enhanced electromagnetic compatibility (EMC). This device is part of the ISO164x family, which integrates the necessary logic to support bidirectional I2C communication channels, making it simpler and more compact compared to optocoupler-based solutions.
The ISO1640BDR is particularly useful in applications requiring high isolation ratings and reliable data transfer. It operates within a supply voltage range of 3 V to 5.5 V on Side 1 and 2.25 V to 5.5 V on Side 2, making it versatile for various system designs.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC1, VCC2) | -0.5 | 6 | V | |
| Input/Output Voltage (SDA1, SCL1, SDA2, SCL2) | -0.5 | VCCX + 0.5 | V | |
| Input/Output Current (SDA1, SCL1) | 0 | 20 | mA | |
| Input/Output Current (SDA2, SCL2) | 0 | 100 | mA | |
| Maximum Junction Temperature (TJ) | 150 | °C | ||
| Storage Temperature (Tstg) | -65 | 150 | °C | |
| Operating Temperature Range | -40 | 125 | °C | |
| Isolation Voltage (VISO) | 3000 (D-8), 5000 (DW-16) | VRMS | ||
| Surge Isolation Voltage | 5000 (D-8), 6250 (DW-16) | VPK | ||
| Package Type | SOIC-8 (D-8) |
Key Features
- Robust isolated bidirectional I2C communication with up to 1.7 MHz operation
- Hot-swappable SDA and SCL lines
- Up to 3 additional unidirectional isolated GPIO channels supporting 50 Mbps speed
- Robust isolation barrier with enhanced EMC:
- >100-year projected lifetime at 450 VRMS working voltage (D-8) and 1500 VRMS working voltage (DW-16)
- Up to 5000 VRMS isolation rating per UL1577
- Up to 10 kV reinforced surge capability
- ±100 kV/μs typical CMTI
- ±8 kV IEC-ESD 61000-4-2 contact discharge protection across isolation barrier
- Supply range: 3 V to 5.5 V (Side 1) and 2.25 V to 5.5 V (Side 2)
- Open-drain outputs with 3.5-mA (Side 1) and 50-mA (Side 2) current-sink capability
- Max capacitive load: 80 pF (Side 1) and 400 pF (Side 2)
- Safety-related certifications including UL 1577, DIN VDE V 0884-11, IEC 62368-1, IEC 61010-1, and IEC 60601-1
Applications
- Isolated I2C buses
- Isolated I2C and SPI buses
- SMBus and PMBus interfaces
- Power Over Ethernet (PoE)
- Motor control systems
- Battery management systems
Q & A
- What is the ISO1640BDR used for?
The ISO1640BDR is used for isolated bidirectional I2C communication, providing robust isolation and enhanced EMC in various applications.
- What are the key features of the ISO1640BDR?
Key features include hot-swappable SDA and SCL lines, up to 1.7 MHz operation, and additional isolated GPIO channels. It also has a robust isolation barrier and supports a wide supply voltage range.
- What are the isolation ratings for the ISO1640BDR?
The device has an isolation rating of up to 5000 VRMS for the DW-16 package and 3000 VRMS for the D-8 package.
- What is the operating temperature range of the ISO1640BDR?
The operating temperature range is from -40°C to +125°C.
- What safety certifications does the ISO1640BDR have?
The device is certified according to UL 1577, DIN VDE V 0884-11, IEC 62368-1, IEC 61010-1, and IEC 60601-1.
- What are the package options for the ISO1640BDR?
The device is available in SOIC-8 (D-8) and SOIC-16 (DW-16) packages.
- What is the maximum power dissipation for the ISO1640BDR?
The maximum power dissipation is approximately 96 mW for both sides, with 43 mW on Side 1 and 53 mW on Side 2.
- Does the ISO1640BDR support ESD protection?
Yes, it provides ±8 kV IEC-ESD 61000-4-2 contact discharge protection across the isolation barrier.
- What is the maximum capacitive load for the ISO1640BDR?
The maximum capacitive load is 80 pF on Side 1 and 400 pF on Side 2.
- Can the ISO1640BDR be used in motor control systems?
Yes, it is suitable for use in motor control systems due to its robust isolation and high-speed data transfer capabilities.
