Overview
The ADM211AR, produced by Analog Devices Inc., is a 5V powered, CMOS RS-232 driver/receiver integrated circuit. This device is designed to facilitate high-speed, high-precision data transmission and is particularly useful in applications requiring RS-232 communication. The ADM211AR features a low power consumption profile, including a shutdown mode that reduces power dissipation to less than 5 μW, making it suitable for battery-powered systems. The IC includes on-board DC-to-DC converters that generate ±10 V supplies from a 5 V input, enabling it to handle RS-232 voltage levels efficiently.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Output Voltage Swing | ±5 | ±9 | V | All transmitter outputs loaded with 3 kΩ to ground | |
| VCC Power Supply Current | 5 | 13 | mA | No load | |
| Shutdown Supply Current | 1 | 10 | μA | ||
| Input Logic Threshold Low (VINL) | 0.8 | V | TIN, EN, SD | ||
| Input Logic Threshold High (VINH) | 2.0 | V | TIN, EN, SD | ||
| Logic Pull-Up Current | 10 | 25 | μA | TIN = 0 V | |
| RS-232 Input Voltage Range | -30 | +30 | V | ||
| RS-232 Input Threshold Low | 0.8 | 1.25 | V | ||
| RS-232 Input Threshold High | 1.9 | 2.4 | V | ||
| RS-232 Input Hysteresis | 0.65 | V | |||
| RS-232 Input Resistance | 3 | 5 | 7 | kΩ | TA = 0°C to 85°C |
| TTL/CMOS Output Voltage Low (VOL) | 0.4 | V | IOUT = 1.6 mA | ||
| TTL/CMOS Output Voltage High (VOH) | 3.5 | V | IOUT = –1.0 mA | ||
| TTL/CMOS Output Leakage Current | 0.05 ±10 | μA | EN = VCC, EN = 0 V, 0 V ≤ ROUT ≤ VCC | ||
| Output Enable Time (TEN) | 115 | ns | ADM206, ADM211 (Figure 22. CL = 150 pF) | ||
| Output Disable Time (TDIS) | 165 | ns | ADM206, ADM211 (Figure 22. RL = 1 kΩ) | ||
| Propagation Delay | 0.5 | 5 | μs | RS-232 to TTL Transition Region | |
| Slew Rate | 8 | V/μs | RL = 3 kΩ, CL = 2500 pF; measured from +3 V to –3 V or –3 V to +3 V |
Key Features
- Low Power Consumption: The ADM211AR operates at low power, with a typical power supply current of 13 mA and a shutdown supply current of less than 5 μW.
- High-Speed Data Transmission: Supports data transmission speeds up to 120 kbps, making it suitable for high-speed applications.
- RS-232 Compatibility: Features four drivers and five receivers, supporting full-duplex communication and capable of driving and receiving data from multiple devices simultaneously.
- On-Board DC-to-DC Converters: Generates ±10 V supplies from a 5 V input, enabling efficient handling of RS-232 voltage levels.
- Low Receiver Hysteresis: The receiver hysteresis is only 650 mV, improving the sensitivity and accuracy of data reception.
- Enable Function: The receivers can be disabled, placing their outputs in a high impedance state, which is useful for sharing a common line or connecting to a microprocessor data bus.
- Package and Operating Temperature: Available in a 28-lead SOIC package and operates over a temperature range of -40°C to +85°C.[
Applications
- Communication Networks: Suitable for optical fiber communication, wireless communication, and satellite communication to achieve high-speed and stable data transmission.
- Automotive Electronics: Used in vehicle entertainment systems, navigation systems, and intelligent driving assistance systems for data transmission between various systems inside the vehicle.
- Industrial Internet of Things (IoT): Applied in smart home, smart agriculture, and smart logistics to promote the intelligentization and interconnection of equipment.
- Consumer Electronics: Used in smartphones, tablets, and wearable devices for data transmission and charging between devices.[
- Computers and Peripherals: Suitable for use in computers, modems, printers, and various instruments due to its compatibility with TTL/CMOS inputs and outputs.[
Q & A
- What is the typical power supply current of the ADM211AR?
The typical power supply current of the ADM211AR is 13 mA.[
- What is the shutdown supply current of the ADM211AR?
The shutdown supply current of the ADM211AR is less than 5 μW.[
- What data transmission speed does the ADM211AR support?
The ADM211AR supports data transmission speeds up to 120 kbps.[
- How many drivers and receivers does the ADM211AR have?
The ADM211AR features four drivers and five receivers.[
- What is the operating temperature range of the ADM211AR?
The ADM211AR operates over a temperature range of -40°C to +85°C.[
- What package type is the ADM211AR available in?
The ADM211AR is available in a 28-lead SOIC package.[
- What is the receiver hysteresis of the ADM211AR?
The receiver hysteresis of the ADM211AR is only 650 mV.[
- Does the ADM211AR have an enable function for the receivers?
Yes, the receivers of the ADM211AR can be disabled, placing their outputs in a high impedance state.[
- What are some common applications of the ADM211AR?
The ADM211AR is used in communication networks, automotive electronics, industrial IoT, consumer electronics, and computers/peripherals.[
- How does the ADM211AR generate the necessary RS-232 voltage levels?
The ADM211AR uses on-board DC-to-DC converters to generate ±10 V supplies from a 5 V input.[
