Overview
The ADM3071EARZ-REEL7 is a 3.3 V, low-power RS-485/RS-422 data transceiver produced by Analog Devices Inc. This device is part of the ADM307xE series, designed for high-speed data transmission in various industrial and commercial applications. It features a single driver and a single receiver, making it suitable for half-duplex communication. The transceiver is known for its robust design, including fail-safe receiver inputs, hot-swap capability, and reduced slew rate drivers to minimize electromagnetic interference (EMI) and reflections in improperly terminated cables.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|---|
| Maximum Data Rate | - | - | 250 kbps | - | - | |
| Propagation Delay, Low-to-High Level | tDPLH | 250 ns | - | 1500 ns | CL = 50 pF, RL = 54 Ω | |
| Propagation Delay, High-to-Low Level | tDPHL | 250 ns | - | 1500 ns | CL = 50 pF, RL = 54 Ω | |
| Rise Time/Fall Time | tDR/tDF | 350 ns | - | 1600 ns | CL = 50 pF, RL = 54 Ω | |
| Differential Driver Output Skew | tDSKEW | - | - | 200 ns | CL = 50 pF, RL = 54 Ω | |
| ESD Protection | - | - | ±15 kV | - | On RS-485 input/output pins | |
| Operating Temperature | - | - | -40°C to +85°C | - | - | |
| Package Type | - | - | 8-Lead Standard Small Outline Package (SOIC) | - | - |
Key Features
- Fail-Safe Receiver Inputs: Ensures a logic high receiver output when the receiver inputs are open, shorted, or connected to a terminated transmission line with all drivers disabled.
- Hot-Swap Capability: Allows line insertion without erroneous data transfer.
- Reduced Slew Rate Drivers: Minimizes EMI and reduces reflections caused by improperly terminated cables.
- Low Power Shutdown Current: Low power consumption when the device is disabled or powered off.
- High-Z Outputs When Disabled: Outputs are in a high impedance state when the device is disabled or powered off.
- Common-Mode Input Range: -7 V to +12 V.
- Thermal Shutdown and Short-Circuit Protection: Protects the device from overheating and short-circuit conditions.
Applications
- Power/Energy Metering: Used in smart meters and other energy monitoring systems.
- Industrial Control: Employed in industrial automation and control systems.
- Lighting Systems: Integrated into smart lighting solutions.
- Telecommunications: Utilized in various telecommunication equipment.
- Security Systems: Part of security and surveillance systems.
- Instrumentation: Used in measurement and instrumentation devices.
Q & A
- What is the maximum data rate of the ADM3071EARZ-REEL7?
The maximum data rate of the ADM3071EARZ-REEL7 is 250 kbps.
- What type of ESD protection does the ADM3071EARZ-REEL7 offer?
The ADM3071EARZ-REEL7 offers ±15 kV ESD protection on RS-485 input/output pins.
- What is the operating temperature range of the ADM3071EARZ-REEL7?
The operating temperature range is -40°C to +85°C.
- What package type is the ADM3071EARZ-REEL7 available in?
The ADM3071EARZ-REEL7 is available in an 8-Lead Standard Small Outline Package (SOIC).
- Does the ADM3071EARZ-REEL7 support hot-swap capability?
Yes, the ADM3071EARZ-REEL7 supports hot-swap capability, allowing line insertion without erroneous data transfer.
- What is the common-mode input range of the ADM3071EARZ-REEL7?
The common-mode input range is -7 V to +12 V.
- Does the ADM3071EARZ-REEL7 have thermal shutdown and short-circuit protection?
Yes, the ADM3071EARZ-REEL7 has thermal shutdown and short-circuit protection.
- How many nodes can be supported on the bus with the ADM3071EARZ-REEL7?
Up to 256 nodes can be supported on the bus.
- What is the purpose of the reduced slew rate drivers in the ADM3071EARZ-REEL7?
The reduced slew rate drivers minimize EMI and reduce reflections caused by improperly terminated cables, ensuring error-free data transmission.
- What happens to the outputs when the ADM3071EARZ-REEL7 is disabled or powered off?
The outputs are in a high impedance state when the device is disabled or powered off.
