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ADM1490E: 5 V, 16 Mbps, ESD Protected, Full-Duplex RS-485 Transceiver

The ADM1490E/ADM1491E are RS-485/RS-422 transceivers with ±8 kV ESD protection and are suitable for high speed, full-duplex communication on multipoint transmission lines. In particular, the ADM1490E/ADM1491E are designed for use in motor control applications requiring communications at data rates up to 16 Mbps.

The ADM1490E/ADM1491E are designed for balanced trans-mission lines and comply with TIA/EIA-485-A-98. The devices each have a 12 kΩ receiver input impedance for unit load RS-485 operation, allowing up to 32 nodes on the bus.The differential transmitter outputs and receiver inputs feature electrostatic discharge circuitry that provides protection to ±8 kV using the human body model (HBM).

The ADM1490E/ADM1491E operate from a single 5 V power supply. Excessive power dissipation caused by bus contention or output shorting is prevented by short-circuit protection and thermal circuitry. Short-circuit protection circuits limit the maximum output current to ±250 mA during fault conditions. A thermal shutdown circuit senses if the die temperature rises above 150°C and forces the driver outputs into a high impedance state under this condition.

The receiver of the ADM1490E/ADM1491E contains a fail-safe feature that results in a logic high output state if the inputs are unconnected (floating). The ADM1490E/ADM1491E feature extremely fast and closely matched switching times. Minimal driver propagation delays permit transmission at data rates up to 16 Mbps, and low skew minimizes EMI interference.The ADM1490E/ADM1491E are fully specified over the commercial and industrial temperature ranges. The ADM1490E is available in two packages: a narrow body, 8-lead SOIC and an 8-lead MSOP. The ADM1491E is also available in two packages: a narrow body, 14-lead SOIC and a 10-lead MSOP.

技术特性 RS-485/RS-422 full-duplex transceiver for high speed motor control applications 16 Mbps data rate ±8 kV ESD protection on RS-485 input/output pins Complies with ANSI/TIA/EIA-485-A-1998 Open circuit fail-safe Suitable for 5 V power supply applications 32 nodes on the bus (1 unit load) Thermal shutdown protection Operating temperature range: −40°C to +85°C ADM1490E packages Narrow body, 8-lead SOIC 8-lead MSOP ADM1491E packages Narrow-body, 14-lead SOIC 10-lead MSOP

技术指标 Function: Driver,Receiver Data Rate: 16Mbps #Tx: 1 # Rx: 1 Pwr Supply (Vnom): +5 Input Compatibility: RS-485,TTL Output Compatibility: RS-485 Protocols: RS-422,RS-485 应用领域 RS-485/RS-422 interfaces Industrial field networks High data rate motor control Multipoint data transmission systems Single-ended-to-differential signal conversion

订购指南

产品型号	封装	引脚	温度范围	包装和数量	报价*(100-499)	报价*1000 pcs	RoHS
ADM1490EBRMZ 产品状态: 量产	8 ld MSOP	8	工业	Tube, 50	$ 1.41	$ 1.20	Y 材料信息
ADM1490EBRMZ-REEL7 产品状态: 量产	8 ld MSOP	8	工业	Reel, 1000	-	$ 1.20	Y 材料信息
ADM1490EBRZ 产品状态: 量产	8 ld SOIC	8	工业	Tube, 98	$ 1.35	$ 1.15	Y 材料信息
ADM1490EBRZ-REEL7 产品状态: 量产	8 ld SOIC	8	工业	Reel, 1000	-	$ 1.15	Y 材料信息

ADM1490E 应用技术支持与电子电路设计开发资源下载

1. ADM1490E 数据手册DataSheet 下载 Rev D, 02/2012 (pdf 335kB). pdf
2. ADI 模拟器件公司比较器产品选型指南 . pdf
3. Analog Devices, Inc. 美国模拟器件公司产品订购手册 .pdf