ADM3491EARZ-REEL7: 3.3 V, ±15 kV ESD-Protected, Full-Duplex Transceiver Featuring Enable Inputs for the Driver & Receiver
The ADM3483E/ADM3485E/ADM3486E/ADM3488E/ADM3490E/ADM3491E are 3.3 V,, low power data transceivers with ±15 kV ESD protection suitable for full- and half-duplex communication on multipoint bus transmission lines. They are designed for balanced data transmission, and they comply with TIA/EIA standards RS485 and RS-422. The ADM3483E/ADM3486E are half-duplex transceivers that share differential lines and have separate enable inputs for the driver and receiver. The full-duplex ADM3488E/ADM3490E/ADM3491E transceivers have dedicated differential line driver outputs and receiver inputs. The ADM3491E also features separate enable inputs for the driver and receiver.
The devices have a 12 kΩ receiver input impedance, which allows up to 32 transceivers on a bus. Because only one driver should be enabled at any time, the output of a disabled or powered-down driver is tristated to avoid overloading the bus.
The driver outputs of the ADM3483E/ADM3486E/ADM3488E are slew rate limited, in order to reduce EMI and data errors caused by reflections from improperly terminated buses. The receiver has a fail-safe feature that ensures a logic high output when the inputs are floating. Excessive power dissipation caused by bus contention or by output shorting is prevented with a thermal shutdown circuit. The parts are fully specified over the industrial temperature range and are available in 8-lead and 14-lead narrow SOIC packages.
产品应用领域 Applications
- Power/energy metering
- Telecommunications
- EMI-sensitive systems
- Industrial control
- Local area networks
ADM3491EARZ-REEL7 特点
- TIA/EIA RS-485/RS-422 compliant
- ±15 kV ESD protection on RS-485 input/output pins
- Data rates: ADM3483E/ADM3488E: 250 kbps
- Half- and full-duplex options
- Up to 32 nodes on the bus
- Receiver open-circuit, fail-safe design
- Outputs high-Z when disabled or powered off
- Common-mode input range: −7 V to +12 V
- Thermal shutdown and short-circuit protection
- Industry-standard 75176 pinout
- 8-lead and 14-lead narrow SOIC packages
ADM3491EARZ-REEL7 功能框图
| 产品型号 | 产品状态 | 封装 | 引脚 | 温度范围 |
|---|---|---|---|---|
| ADM3491EARZ | 量产 | 14 ld SOIC | 14 | 工业 |
| ADM3491EARZ-REEL7 | 量产 | 14 ld SOIC | 14 | 工业 |
