Overview
The ST7538Q is a Half Duplex synchronous/asynchronous Frequency Shift Keying (FSK) Modem designed by STMicroelectronics for power line communication network applications. This device operates from a single supply voltage ranging from 7.5V to 12.5V and integrates a power line driver along with two linear regulators for 5V and 3.3V supplies. The ST7538Q is realized in Multipower BCD5 technology, allowing the integration of DMOS, Bipolar, and CMOS structures in the same chip. It is highly versatile, featuring programmable transmission frequencies, baud rates, and various detection mechanisms, making it suitable for applications adhering to the European CENELEC EN 50065 specifications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 7.5 to 12.5 | V |
| Operating Ambient Temperature | -40 to +85 | °C |
| Storage Temperature | -50 to 150 | °C |
| Quiescent Current (Iq) | 5 | mA |
| Voltage Regulator Output (5V) | Up to 50mA | |
| Voltage Regulator Output (3.3V) | Up to 50mA | |
| Transmission Frequencies | 8 programmable frequencies | |
| Baud Rate | Up to 4800 BPS | |
| Receiving Sensitivity | Up to 250µVrms | |
| Thermal Resistance (Junction-Ambient) | 35 to 50 °C/W |
Key Features
- Half Duplex synchronous/asynchronous FSK Modem
- Integrated power line driver with programmable voltage and current control
- Programmable interface: Synchronous and Asynchronous
- Integrated 5V and 3.3V voltage regulators with short circuit protection
- Low power consumption (Iq = 5mA)
- Carrier or preamble detection, band in use detection, and mains zero crossing detection
- Programmable 24 or 48 bit register with security checksum
- Watchdog timer and output voltage freeze
- UART/SPI host interface
- Support for EN 50065 CENELEC specifications
Applications
The ST7538Q is primarily designed for power line communication (PLC) network applications, including:
- Automatic Meter Reading (AMR) systems
- Smart Grid and Smart Home applications
- Industrial control and automation systems
- Any application requiring reliable and efficient communication over power lines
Q & A
- What is the primary function of the ST7538Q?
The ST7538Q is a Half Duplex synchronous/asynchronous FSK Modem designed for power line communication network applications.
- What is the operating voltage range of the ST7538Q?
The ST7538Q operates from a single supply voltage ranging from 7.5V to 12.5V.
- What are the integrated voltage regulators in the ST7538Q?
The device includes integrated 5V and 3.3V voltage regulators with short circuit protection.
- What is the maximum baud rate supported by the ST7538Q?
The ST7538Q supports baud rates up to 4800 BPS.
- What detection mechanisms are available in the ST7538Q?
The device features carrier or preamble detection, band in use detection, and mains zero crossing detection.
- Does the ST7538Q support any specific communication standards?
Yes, it supports applications in accordance with EN 50065 CENELEC specifications.
- What is the quiescent current of the ST7538Q?
The quiescent current (Iq) is 5mA.
- What interfaces does the ST7538Q support for host communication?
The device supports UART/SPI host interfaces.
- What is the thermal resistance of the ST7538Q?
The thermal resistance (Junction-Ambient) ranges from 35 to 50 °C/W depending on the mounting conditions.
- What are some typical applications of the ST7538Q?
Typical applications include Automatic Meter Reading (AMR) systems, Smart Grid and Smart Home applications, and industrial control and automation systems.
