Overview
The ADM3074EYRZ is a 3.3 V, low power data transceiver produced by Analog Devices Inc. It is designed for full- and half-duplex communication on multipoint bus transmission lines, complying with TIA/EIA standards for RS-485 and RS-422 protocols. This transceiver features ±15 kV ESD protection on the RS-485 input/output pins, making it robust against electrical surges. The device is suitable for balanced data transmission and includes true fail-safe receiver inputs, which ensure a logic high output level when the inputs are open or shorted, eliminating the need for external bias resistors.
Key Specifications
| Parameter | Value | Unit | Description |
|---|---|---|---|
| Manufacturer | Analog Devices Inc. | ||
| Part Number | ADM3074EYRZ | ||
| Package | 8-SOIC (0.154, 3.90mm Width) | ||
| Number of Pins | 8 | ||
| Logic Function | Receiver, Transceiver | ||
| Interface | RS-422, RS-485 | ||
| Driver Number of Bits | 1 | ||
| Receiver Number of Bits | 1 | ||
| Data Rate | 500 kbps | Maximum data rate for the transceiver | |
| Receiver Hysteresis | 100 mV | Hysteresis voltage for the receiver inputs | |
| Duplex Mode | Full Duplex | Supports full-duplex communication | |
| ESD Protection | ±15 kV | ESD protection on RS-485 input/output pins | |
| Operating Temperature | −40°C to +125°C | Temperature range for operation |
Key Features
- True Fail-Safe Receiver Inputs: Ensures a logic high output level when the inputs are open or shorted, eliminating the need for external bias resistors.
- ±15 kV ESD Protection: Provides robust protection against electrical surges on the RS-485 input/output pins.
- Full- and Half-Duplex Options: Supports both full- and half-duplex communication on multipoint bus transmission lines.
- Low Power Shutdown Current: The device enters a low power shutdown mode when the receiver output enable (RE) is high and the driver output enable (DE) is low.
- Reduced Slew Rates for Low EMI: Minimizes electromagnetic interference (EMI) through reduced slew rates.
- Thermal Shutdown and Short-Circuit Protection: Protects the device from thermal and short-circuit conditions.
- Common-Mode Input Range: Supports a common-mode input range of −7 V to +12 V.
Applications
- Power/Energy Metering: Suitable for use in power and energy metering systems.
- Industrial Control: Used in various industrial control applications.
- Lighting Systems: Can be integrated into lighting control systems.
- Telecommunications: Applicable in telecommunications equipment.
- Security Systems: Used in security and surveillance systems.
- Instrumentation: Suitable for use in various instrumentation applications.
- Wired and Cordless Telephones: Can be used in telephone circuitry.
- Desktop and Notebook PCs: Used in computer peripherals and systems.
- Portable and Desktop Radios: Applicable in radio communication devices.
Q & A
- What is the primary function of the ADM3074EYRZ?
The ADM3074EYRZ is a 3.3 V, low power data transceiver designed for full- and half-duplex communication on multipoint bus transmission lines, complying with RS-485 and RS-422 protocols.
- What is the maximum data rate of the ADM3074EYRZ?
The maximum data rate of the ADM3074EYRZ is 500 kbps.
- What type of ESD protection does the ADM3074EYRZ offer?
The ADM3074EYRZ offers ±15 kV ESD protection on the RS-485 input/output pins.
- What is the operating temperature range of the ADM3074EYRZ?
The operating temperature range of the ADM3074EYRZ is −40°C to +125°C.
- Does the ADM3074EYRZ support full-duplex communication?
Yes, the ADM3074EYRZ supports full-duplex communication.
- What is the significance of true fail-safe receiver inputs in the ADM3074EYRZ?
The true fail-safe receiver inputs ensure a logic high output level when the inputs are open or shorted, eliminating the need for external bias resistors.
- How does the ADM3074EYRZ reduce electromagnetic interference (EMI)?
The ADM3074EYRZ reduces EMI through reduced slew rates.
- What kind of protection does the ADM3074EYRZ offer against thermal and short-circuit conditions?
The ADM3074EYRZ offers thermal shutdown and short-circuit protection.
- What is the common-mode input range of the ADM3074EYRZ?
The common-mode input range of the ADM3074EYRZ is −7 V to +12 V.
- In what types of applications is the ADM3074EYRZ commonly used?
The ADM3074EYRZ is commonly used in power/energy metering, industrial control, lighting systems, telecommunications, security systems, and instrumentation.
