Overview
The ADM3222ARU-REEL7 is a dual-channel RS-232 transceiver produced by Analog Devices Inc. This component is designed to operate from a single 3.3 V supply, making it ideal for battery-powered portable instruments and other low-power applications. The ADM3222 integrates a charge pump voltage converter, level-shifting transmitters, and receivers, enabling the development of RS-232 signal levels while minimizing power consumption. It is an enhancement of the AD230 to AD241 family and is essentially plug-in compatible with these predecessors.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices Inc. |
| Type | RS-232 Transceiver |
| Number of Drivers/Receivers | 2/2 |
| Duplex | Full |
| Supply Voltage | 3.3 V |
| Maximum Data Rate | 460 kbps |
| Transmitter Output Voltage | ±9 V |
| Receiver Input Voltage Range | ±30 V (protected) |
| Transmitter Propagation Delay | 0.3 - 1.2 μs |
| Receiver Propagation Delay | 0.4 - 1 μs |
| Shutdown Facility | Yes (ADM3222) |
Key Features
- Low Power Consumption: Designed to minimize power dissipation, making it suitable for battery-powered devices.
- Shutdown Facility: The ADM3222 has a shutdown feature to further reduce power consumption when not in use.
- High Baud Rate: Supports data transmission rates up to 460 kbps, exceeding EIA/RS-232E specifications.
- RS-232 Compatibility: Operates with standard RS-232 signal levels while using a single 3.3 V supply.
- Internal Charge Pump: Includes a charge pump voltage converter to generate the necessary voltage levels for RS-232 operation.
- Schmitt-Trigger Inputs: Receivers have Schmitt-trigger inputs with a hysteresis level of 0.4 V for error-free reception).
- Protection Features: Protected against overvoltages up to ±30 V on the receiver inputs).
Applications
- Portable Instruments: Ideal for battery-powered devices due to low power consumption and shutdown facility).
- ISDN Modems: Suitable for high-speed data links required by ISDN modem standards).
- Industrial Automation: Can be used in various industrial applications requiring reliable serial communication).
- Embedded Systems: Useful in embedded systems where low power and high data rates are critical).
Q & A
- What is the primary function of the ADM3222ARU-REEL7?
The primary function of the ADM3222ARU-REEL7 is to act as a dual-channel RS-232 transceiver, enabling communication between devices using RS-232 signal levels while operating from a single 3.3 V supply).
- What is the maximum data rate supported by the ADM3222ARU-REEL7?
The ADM3222ARU-REEL7 supports a maximum data rate of 460 kbps).
- Does the ADM3222ARU-REEL7 have a shutdown facility?
- What is the typical output voltage of the transmitters in the ADM3222ARU-REEL7?
The typical output voltage of the transmitters is ±9 V).
- How are the receiver inputs protected in the ADM3222ARU-REEL7?
The receiver inputs are protected against overvoltages up to ±30 V).
- What type of inputs do the receivers have in the ADM3222ARU-REEL7?
The receivers have Schmitt-trigger inputs with a hysteresis level of 0.4 V).
- Can the ADM3222ARU-REEL7 be used in industrial automation?
- Is the ADM3222ARU-REEL7 suitable for ISDN modem standards?
- What is the purpose of the internal charge pump in the ADM3222ARU-REEL7?
The internal charge pump generates the necessary voltage levels for RS-232 operation from a single 3.3 V supply).
- Is the ADM3222ARU-REEL7 obsolete?
