Overview
The ADM3078EARZ from Analog Devices Inc. is a 3.3V, low-power data transceiver designed for balanced data transmission in full- and half-duplex communication on multipoint bus transmission lines. It complies with TIA/EIA standards for RS-485 and RS-422. This device features ±15kV ESD protection on RS-485 input/output pins, true fail-safe receiver inputs, and a hot-swap input structure on DE and active-low RE pins. The transceiver supports up to 256 nodes on the bus and operates at a data rate of 16Mbps. It is packaged in an 8-lead standard small outline package (SOIC-N) and has an operating temperature range from -40°C to +85°C.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Supply Voltage | 3.3V ± 10% | V | |
| Data Rate | 16 Mbps | Mbps | |
| Number of Drivers/Receivers | 1/1 | ||
| ESD Protection | ±15 kV (HBM) | kV | On RS-485 input/output pins |
| Operating Temperature | -40°C to +85°C | °C | |
| Package Type | 8-Lead SOIC (0.154, 3.90mm Width) | ||
| Common-Mode Input Range | -7 V to +12 V | V | |
| Receiver Hysteresis | 100 mV | mV | |
| Bus Nodes | Up to 256 |
Key Features
- TIA/EIA RS-485/RS-422 compliant
- ±15kV ESD protection on RS-485 input/output pins
- True fail-safe receiver inputs to ensure a known state when inputs are open or shorted
- Hot-swap input structure on DE and active-low RE pins
- Outputs high-Z when disabled or powered off to avoid bus overloading
- Common-mode input range from -7V to +12V
- Thermal shutdown and short-circuit protection
- Low power shutdown current
- Reduced slew rates for low EMI
Applications
- Power/energy metering
- Industrial control
- Lighting systems
- Telecommunications
- Security systems
- Instrumentation
Q & A
- What is the primary function of the ADM3078EARZ?
The ADM3078EARZ is a 3.3V, low-power data transceiver designed for balanced data transmission in full- and half-duplex communication on multipoint bus transmission lines, complying with TIA/EIA standards for RS-485 and RS-422.
- What is the data rate of the ADM3078EARZ?
The data rate of the ADM3078EARZ is 16 Mbps.
- How many nodes can be supported on the bus by the ADM3078EARZ?
The ADM3078EARZ can support up to 256 nodes on the bus.
- What type of ESD protection does the ADM3078EARZ offer?
The ADM3078EARZ offers ±15kV ESD protection on RS-485 input/output pins.
- What is the operating temperature range of the ADM3078EARZ?
The operating temperature range of the ADM3078EARZ is from -40°C to +85°C.
- What is the package type of the ADM3078EARZ?
The ADM3078EARZ is packaged in an 8-lead standard small outline package (SOIC-N).
- Does the ADM3078EARZ have true fail-safe receiver inputs?
Yes, the ADM3078EARZ has true fail-safe receiver inputs, which eliminate the need for external bias resistors and ensure a known state when inputs are open or shorted.
- What kind of protection does the ADM3078EARZ offer against thermal and short-circuit conditions?
The ADM3078EARZ offers thermal shutdown and short-circuit protection.
- Can the ADM3078EARZ be used in hot-swap applications?
Yes, the ADM3078EARZ has a hot-swap input structure on DE and active-low RE pins, making it suitable for hot-swap applications.
- What are some common applications of the ADM3078EARZ?
The ADM3078EARZ is commonly used in power/energy metering, industrial control, lighting systems, telecommunications, security systems, and instrumentation.
- Is the ADM3078EARZ RoHS compliant?
Yes, the ADM3078EARZ is RoHS compliant and lead-free.
