1. One-Sentence Description
The ADM3311EARSZ is a low-power RS-232 transceiver integrated with ESD protection, specially designed for harsh environments such as automotive applications. It supports single-power-supply operation and a green idle mode, meeting the requirements of high-speed data transmission.
2. Core Features
l Ultra-Low Power Consumption: Only 20nA current is consumed in shutdown mode, and power consumption is dynamically adjusted in the green idle mode.
l High Reliability: Supports ±15kV IEC 1000-4-2 ESD protection (Human Body Model) with strong anti-interference capability.
l Multi-Protocol Compatibility: Compliant with the RS-232 standard, compatible with 3V logic levels, and supports UART interfaces.
l Flexible Configuration: Equipped with 3 drivers and 5 receivers, supporting full-duplex communication.
l Automotive-Grade Certification: Meets the AEC-Q100 standard, with an operating temperature range of -40°C to +85°C.
3. Core Technical Specifications
| Parameter | Typical Value | Test Conditions |
| Data Rate | 460 kbps | RL=3kΩ, CL=150pF |
| Supply Voltage | 2.7V–3.6V | |
| Quiescent Current (Shutdown) | 20nA | All receivers turned off |
| ESD Protection (RS-232) | ±15kV | IEC 1000-4-2 contact discharge |
| Maximum Transmission Distance | 15m | @115.2 kbps, 3kΩ load |
| Package Type | SSOP-28 | Automotive-grade package (W suffix) |
4. The Story Behind the Chip
With the surging demand for low power consumption and high reliability in mobile devices and automotive electronics, ADI launched the ADM3311E series. By integrating charge pump technology and a green idle mode, it solves the pain point that traditional RS-232 transceivers require dual-power-supply operation. The automotive-grade version (ADM3311EARSZ) further enhances ESD protection and temperature tolerance, making it an ideal choice for in-vehicle communication systems.
5. Design Philosophy
l Green Energy Saving: Reduces idle power consumption by dynamically adjusting the charge pump frequency (250kHz/300kHz).
l Anti-Interference Optimization: Built-in ESD protection diodes and overvoltage clamping circuits to withstand transient voltage surges.
l Compact Package: The SSOP-28 package saves PCB space, adapting to the compact layout of in-vehicle electronic devices.
6. Application Scenarios
l Automotive Electronics: In-vehicle GPS navigation, infotainment systems, CAN bus interfaces.
l Industrial Control: PLC communication, sensor data acquisition, industrial printers.
l Consumer Electronics: Laptop computers, smartphone data cables, PDA devices.
l Medical Equipment: Serial communication modules for ventilators and patient monitors.
7. Unique Advantages
- Automotive-Grade Reliability: The only ADM3311E model supporting the wide temperature range of -40°C to +85°C, adapting to extreme environments.
- Dual Receiver Hold: Allows two receivers to remain operational in shutdown mode for status monitoring.
- Flexible Power Supply: Supports low-voltage startup at 2.7V, compatible with lithium-ion battery-powered scenarios.
8. What Engineers Must Know When Selecting
- Power Supply Design: Requires matching 0.1μF–1μF charge pump capacitors (C1-C3), with ceramic capacitors recommended to reduce ESR.
- ESD Protection Level: Automotive applications need to focus on AEC-Q100 certification to ensure long-term reliability.
- Data Rate Matching: A 460 kbps data rate is suitable for most industrial scenarios; high-speed links require evaluating line capacitance (<150pF).
- Package Compatibility: The SSOP-28 package requires reserved heat dissipation space, and derating is recommended in high-temperature environments.
Conclusion: The ADM3311EARSZ has become a benchmark product in the serial communication field with its excellent low power consumption, high protection, and automotive-grade stability. Whether in vehicle systems or industrial equipment, its green energy-saving and strong anti-interference designs can significantly improve system reliability.
Contact:
Sylvia Xu | ECSource Components Co.,Limited
Top 10 Test Laboratory Distributors in Asia.
D-U-N-S Number:655918890 | ISO90001 Certificated Company
Phone/Whatsapp: 0086-19806586673
Email:sylvia@ecsource.net
Line Card : FPGA, RF, MEMORY,CONNECTOR,Power
