Overview
The ADM3222ARW from Analog Devices Inc. is a high-speed, dual-channel RS-232/V.28 interface device designed to operate from a single +3.3 V power supply. This component is part of the ADM3202/ADM3222/ADM1385 family, which is optimized for low power consumption and is ideal for battery-powered portable instruments. The ADM3222ARW features a charge pump voltage converter, level-shifting transmitters, and receivers, enabling RS-232 signal levels while minimizing power dissipation.
Key Specifications
| Parameter | Value | Description |
|---|---|---|
| Supply Voltage | +3.3 V | Single power supply operation |
| Data Rate | Up to 460 kbps | High-speed data transmission |
| Transmitters/Receivers | 2/2 | Dual transmitter and receiver channels |
| Package Type | 18-SOIC (0.295, 7.50mm Width) | Compact package for space-saving designs |
| Receiver Hysteresis | 400 mV | Schmitt-trigger inputs for error-free reception |
| Shutdown Current | < 0.5 μA | Low quiescent current in shutdown mode |
| Input/Output Levels | TTL/CMOS inputs, RS-232 outputs, CMOS outputs | Compatibility with various logic levels |
Key Features
- Low Power Consumption: Ideal for battery-powered portable instruments with a shutdown facility to reduce quiescent current to less than 0.5 μA.
- High-Speed Data Transmission: Supports data rates up to 460 kbps, suitable for high-speed data links and ISDN modem standards.
- Single Supply Operation: Operates from a single +3.3 V power supply using a charge pump voltage converter.
- Level-Shifting Capability: Converts 3.3 V logic to RS-232 levels and vice versa.
- Shutdown and Enable Functions: Includes enable and shutdown circuitry to control receiver outputs and power down the charge pump and transmitter outputs.
- Protection Features: Protected against overvoltages up to ±30 V and includes internal 5 kΩ pull-down resistors on RS-232 inputs.
Applications
- Portable Instruments: Ideal for battery-powered devices due to low power consumption and shutdown facilities.
- ISDN Modems: Supports high-speed data rates required by ISDN modem standards.
- Industrial and Automotive Systems: Suitable for various industrial and automotive interfaces due to its robust design and protection features.
- Embedded Systems: Used in embedded systems requiring RS-232 communication with minimal power consumption.
Q & A
- What is the supply voltage for the ADM3222ARW?
The ADM3222ARW operates from a single +3.3 V power supply.
- What is the maximum data rate supported by the ADM3222ARW?
The ADM3222ARW supports data rates up to 460 kbps.
- How many transmitter and receiver channels does the ADM3222ARW have?
The ADM3222ARW has 2 transmitter and 2 receiver channels.
- What is the package type of the ADM3222ARW?
The ADM3222ARW is available in an 18-SOIC package.
- What is the receiver hysteresis level of the ADM3222ARW?
The receiver hysteresis level is 400 mV.
- How much current does the ADM3222ARW consume in shutdown mode?
The quiescent current in shutdown mode is less than 0.5 μA.
- What are the input and output logic levels of the ADM3222ARW?
The inputs are TTL/CMOS compatible, and the outputs are RS-232 and CMOS levels.
- Does the ADM3222ARW have any protection features?
Yes, it is protected against overvoltages up to ±30 V and includes internal 5 kΩ pull-down resistors on RS-232 inputs.
- What are some common applications of the ADM3222ARW?
Common applications include portable instruments, ISDN modems, industrial and automotive systems, and embedded systems.
- How does the ADM3222ARW manage power consumption?
The ADM3222ARW uses a charge pump voltage converter and has a shutdown facility to minimize power consumption.
