Overview
The ADM1487EARZ from Analog Devices Inc. is a 5 V, ultra-low power RS-485/RS-422 transceiver designed for half-duplex communication on multipoint bus transmission lines. This device is compliant with Telecommunication Industry Association/Electronics Industries Association (TIA/EIA) standards RS-485 and RS-422, making it suitable for balanced data transmission. It features a single driver and a single receiver per package, with enhanced protection and low power consumption, making it ideal for various industrial and communication applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Supply Voltage | 4.5 | 5 | 5.5 | V | |
| Data Rate (ADM1487E) | 2.5 | Mbps | |||
| Driver Propagation Delay (Low to High) | 10 | 40 | 60 | ns | RDIFF = 54 Ω, CL1 = CL2 = 100 pF |
| Driver Propagation Delay (High to Low) | 10 | 40 | 60 | ns | RDIFF = 54 Ω, CL1 = CL2 = 100 pF |
| Rise/Fall Time | 3 | 20 | 40 | ns | RDIFF = 54 Ω, CL1 = CL2 = 100 pF |
| Enable Time to High Level | 45 | 70 | ns | CL = 100 pF, S1 closed | |
| Enable Time to Low Level | 45 | 70 | ns | CL = 100 pF, S1 closed | |
| Quiescent Operating Current | 80 | μA | |||
| Supply Current in Shutdown | 0.5 | 10 | μA | DE = 0 V, RE = VCC | |
| ESD Protection | ±15 kV | Human Body Model (HBM) |
Key Features
- TIA/EIA RS-485/RS-422 compliant
- Ultra-low power consumption with a quiescent operating current of typically 80 μA
- ±15 kV ESD protection on RS-485 I/O pins (Human Body Model)
- Half-duplex operation
- Reduced slew rates for low EMI
- Common-mode input range: −7 V to +12 V
- Thermal shutdown and short-circuit protection
- 8-lead SOIC packages
- Qualified for automotive applications (ADM487E and ADM1487E)
Applications
- Energy/power metering
- Lighting systems
- Industrial control
- Telecommunications
- Security systems
- Instrumentation
Q & A
- What is the primary function of the ADM1487EARZ?
The ADM1487EARZ is a half-duplex RS-485/RS-422 transceiver designed for balanced data transmission on multipoint bus transmission lines. - What are the compliance standards for the ADM1487EARZ?
The device is compliant with TIA/EIA standards RS-485 and RS-422. - What is the maximum data rate of the ADM1487EARZ?
The maximum data rate is 2.5 Mbps. - What is the typical quiescent operating current of the ADM1487EARZ?
The typical quiescent operating current is 80 μA. - What level of ESD protection does the ADM1487EARZ offer?
The device offers ±15 kV ESD protection on RS-485 I/O pins (Human Body Model). - What are the common-mode input range and the output skew of the ADM1487EARZ?
The common-mode input range is −7 V to +12 V, and the output skew is 5 to 10 ns. - Is the ADM1487EARZ suitable for automotive applications?
Yes, the ADM487E and ADM1487E are qualified for automotive applications. - What type of packaging does the ADM1487EARZ come in?
The device comes in 8-lead SOIC packages. - What are some of the key applications of the ADM1487EARZ?
Key applications include energy/power metering, lighting systems, industrial control, telecommunications, security systems, and instrumentation. - Does the ADM1487EARZ have thermal shutdown and short-circuit protection?
Yes, the device features thermal shutdown and short-circuit protection.
