ISO7721BDWR - 2Ch Reinforced Digital Isolator | TI
MPN: ISO7721BDWR ✓ Hoạt độngISO7721BDWR Tóm tắt
Digital isolators are components that transmit digital signals across an isolation barrier, providing galvanic isolation to protect circuits and users from high voltages, ground loops, and noise. They are essential in systems where safety and signal integrity are critical, such as in motor drives, power supplies, and medical equipment. The ISO7721BDWR belongs to the ISO772x family, which includes reinforced and basic insulation variants, offering flexibility for different isolation requirements.
Key features of the ISO7721BDWR include its reinforced insulation rating, 100 Mbps data rate, and 85 kV/µs CMTI, which ensures reliable operation in noisy environments. The device supports CAN, RS232, and RS485 protocols, making it versatile for industrial communication. It also features low power consumption and a wide supply voltage range, enhancing its suitability for power-sensitive designs.
Technically, the ISO7721BDWR uses TI's capacitive isolation technology, which provides robust performance against magnetic interference and ensures long-term reliability. The device has a channel configuration of 1/1 (one forward, one reverse), allowing bidirectional communication. It also includes an enable pin for power management and failsafe outputs for safety-critical applications.
Typical applications include industrial fieldbus communication, isolated SPI/UART interfaces, motor control, and power converters. The high CMTI and reinforced isolation make it ideal for harsh environments where voltage transients are common.
When designing with the ISO7721BDWR, ensure proper PCB layout with adequate creepage and clearance distances to maintain the isolation rating. Place decoupling capacitors close to the power pins and follow the recommended layout guidelines in the datasheet to achieve optimal EMC performance.
Bộ thay thế dễ dàng lắp đặt cho ISO7721BDWR — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với ISO7721BDWR (cùng hình factor và footprint) — khác nhau ở Isolation Rating, Package, CMTI, Number of Channels.
ISO7721DWR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ISO7721FBDWR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ISO7721DWVR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ISO7721QDRQ1
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ADUM220N0BRWZ-RL
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
ADUM2281CRIZ
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
ISO7721BDWR Thông số kỹ thuật
| Isolation Rating | 5000 Vrms (per UL 1577) |
| Number of Channels | 2 (1 forward, 1 reverse) |
| Tốc độ dữ liệu | 100 Mbps |
| CMTI | 85 kV/µs |
| Hộp | 16-SOIC (DW), 7.50 mm width |
| Nhiệt độ hoạt động | -55°C to +125°C |
| Điện áp cung cấp | 2.25 V to 5.5 V |
| Isolation Type | Reinforced |
| Protocols Supported | CAN, RS232, RS485 |
| Kiểu đầu ra | Digital |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
Cấu hình chân ISO7721BDWR
| Chân 1 | VCC1 — Supply voltage for side 1 |
| Chân 2 | GND1 — Ground for side 1 |
| Chân 3 | INA — Input channel A (side 1) |
| Chân 4 | OUTB — Output channel B (side 1) |
| Chân 5 | EN1 — Enable for side 1 |
| Chân 6 | NC — No connect |
| Chân 7 | NC — No connect |
| Chân 8 | GND1 — Ground for side 1 |
| Chân 9 | GND2 — Ground for side 2 |
| Chân 10 | NC — No connect |
| Chân 11 | NC — No connect |
| Chân 12 | EN2 — Enable for side 2 |
| Chân 13 | OUTA — Output channel A (side 2) |
| Chân 14 | INB — Input channel B (side 2) |
| Chân 15 | GND2 — Ground for side 2 |
| Chân 16 | VCC2 — Supply voltage for side 2 |
Ứng dụng tiêu biểu
ISO7721BDWR phù hợp cho 6 Áp dụngs: Industrial Fieldbus Communication, Isolated SPI/UART Interface, Motor Control, Power Converters, Medical Equipment, Automotive Electronics.
Industrial Fieldbus Communication
The ISO7721BDWR provides galvanic isolation for CAN, RS232, and RS485 buses, ensuring reliable data transmission in noisy industrial environments. Its 100 Mbps data rate and 85 kV/µs CMTI allow it to handle high-speed communication while rejecting common-mode transients. The reinforced 5000 Vrms isolation protects sensitive controllers from voltage spikes and ground loops, making it ideal for PLCs, motor drives, and factory automation systems.
Được đề xuất
Isolated SPI/UART Interface
The ISO7721BDWR can be used to isolate SPI or UART signals between microcontrollers and peripheral devices, such as ADCs, DACs, or sensors. Its dual-channel configuration with one forward and one reverse channel is ideal for bidirectional communication. The high data rate supports fast SPI clocks, while the reinforced isolation ensures safety in high-voltage applications like motor control or power converters.
Được đề xuất
Motor Control
In motor control systems, the ISO7721BDWR isolates the control signals from the high-voltage power stage. Its high CMTI (85 kV/µs) ensures reliable operation in the presence of fast-switching transients from IGBTs or MOSFETs. The reinforced isolation rating of 5000 Vrms provides safety insulation, protecting the low-voltage control circuitry from potential faults. The wide temperature range (-55°C to +125°C) makes it suitable for industrial motor drives.
Được đề xuất
Power Converters
The ISO7721BDWR is used in power converters to isolate feedback signals and control signals across the isolation barrier. Its high data rate and robust EMC performance ensure accurate signal transmission in switching power supplies. The reinforced isolation rating meets safety requirements for mains-connected applications. The device's low power consumption and wide supply voltage range make it suitable for both AC-DC and DC-DC converters.
Được đề xuất
Medical Equipment
In medical equipment, patient safety is paramount, and the ISO7721BDWR provides reinforced isolation to protect patients and operators from electric shock. Its 5000 Vrms isolation rating meets stringent safety standards. The high CMTI ensures reliable operation in environments with electromagnetic interference. The device is suitable for applications such as patient monitoring, diagnostic equipment, and medical imaging systems.
Được đề xuất
Automotive Electronics
The ISO7721BDWR can be used in automotive electronics for isolating communication interfaces like CAN and RS485. Its wide temperature range and high CMTI make it suitable for under-hood applications. However, for AEC-Q100 qualified parts, consider the ISO7721QDRQ1 variant. The device is used in battery management systems, motor controllers, and infotainment systems.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ISO7721BDWR — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | ISO7721DWR | ISO7721FBDWR | ISO7721DWVR | ISO7721QDRQ1 | ADUM220N0BRWZ-RL | ADUM2281CRIZ |
|---|---|---|---|---|---|---|---|
| Package | 16-SOIC (DW) | 16-SOIC (DW) | 16-SOIC (DW) | 16-SOIC (DW) | 16-SOIC (DW) | 16-SOIC (DW) | 16-SOIC (DW) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices | Analog Devices |
| Isolation Rating | 5000 Vrms | 5000 Vrms | 5000 Vrms | 3000 Vrms | 5000 Vrms | 5000 Vrms | 5000 Vrms |
| Data Rate | 100 Mbps | 100 Mbps | 100 Mbps | 100 Mbps | 100 Mbps | 150 Mbps | 100 Mbps |
| CMTI | 85 kV/µs | 85 kV/µs | 85 kV/µs | 85 kV/µs | 85 kV/µs | 100 kV/µs | 75 kV/µs |
| Channel Configuration | 1/1 | 2/0 | 1/1 | 1/1 | 1/1 | 2/0 | 2/0 |
| Fail-Safe Output | Low | Low | High | Low | Low | Low | Low |
| Automotive Grade | No | No | No | No | Yes (AEC-Q100) | No | No |
Bảo phân biệt quan trọng
- Reinforced isolation rating of 5000 Vrms (vsISO7721DWVR)
- High CMTI of 85 kV/µs (vsADUM2281CRIZ)
- Fail-safe low output (vsISO7721FBDWR)
Ghi chú thiết kế
For optimal EMC performance, place decoupling capacitors (0.1 µF and 10 µF) close to the VCC1 and VCC2 pins. Ensure a solid ground plane on both sides of the isolation barrier. Maintain proper creepage and clearance distances (at least 8 mm for 5000 Vrms) between the input and output sides to meet safety standards.
Keep the isolation barrier clear of any copper traces or components to avoid reducing the isolation rating. Route high-voltage traces away from the low-voltage side. Use a slot in the PCB under the isolator to increase creepage distance if needed.
Do not exceed the absolute maximum supply voltage of 6 V on VCC1 or VCC2. Ensure the input signals do not exceed the supply voltage. When using the enable pins, note that disabling the outputs may cause the fail-safe state to be asserted. Refer to the datasheet for proper enable timing.
Thông tin tuân thủ
RoHS compliant per TI product page. Not AEC-Q100 qualified; use ISO7721QDRQ1 for automotive.
