Overview
The ADM3222ARUZ-REEL, produced by Analog Devices Inc., is a high-speed, 2-channel RS-232/V.28 interface transceiver. This device operates from a single 3.3 V power supply, making it ideal for battery-powered portable instruments. It conforms to the EIA-232E and CCITT V.28 specifications and supports data rates up to 460 kbps. The ADM3222 features low power consumption, with a shutdown facility that reduces the quiescent current to less than 0.5 μA, enhancing battery life in portable applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 3.0 to 3.6 | V |
| Maximum Data Rate | 460 | kbps |
| Transmitter Output Voltage | ±9 | V |
| Receiver Input Voltage Range | ±30 | V |
| Transmitter Propagation Delay | 0.3 to 1.2 | μs |
| Receiver Propagation Delay | 0.4 to 1 | μs |
| Shutdown Current | < 0.5 | μA |
| Package Type | 20-TSSOP | |
| Operating Temperature Range | -40 to 85 | °C |
Key Features
- High-speed operation up to 460 kbps.
- Single 3.3 V power supply with voltage doubler/inverter using external capacitors.
- Low power consumption with shutdown facility to reduce quiescent current to less than 0.5 μA.
- CMOS technology for minimal power dissipation.
- RS-232 signal levels (typically ±9 V) with TTL/CMOS compatible inputs.
- Schmitt-trigger inputs with 0.4 V hysteresis for error-free reception.
- Internal 5 kΩ pull-down resistors on RS-232 inputs.
- Enable and shutdown circuitry for receiver and transmitter control.
Applications
- Battery-powered portable instruments.
- ISDN modem standards requiring high data rates.
- Industrial automation and control systems.
- Automotive and aerospace applications requiring reliable serial communication.
- Point-of-sale terminals and other serial communication devices.
Q & A
- What is the maximum data rate supported by the ADM3222ARUZ-REEL?
The ADM3222ARUZ-REEL supports data rates up to 460 kbps.
- What is the operating voltage range of the ADM3222ARUZ-REEL?
The device operates from a single 3.0 V to 3.6 V power supply.
- What is the typical output voltage of the transmitter?
The transmitter outputs are typically ±9 V.
- How does the shutdown facility affect power consumption?
The shutdown facility reduces the quiescent current to less than 0.5 μA, significantly reducing power consumption.
- What type of inputs does the transmitter accept?
The transmitter inputs accept TTL/CMOS levels.
- What is the purpose of the internal 5 kΩ pull-down resistors on RS-232 inputs?
The internal 5 kΩ pull-down resistors ensure that unconnected inputs are pulled to 0 V, resulting in a Logic 1 output level.
- What is the operating temperature range of the ADM3222ARUZ-REEL?
The device operates over a temperature range of -40°C to 85°C.
- What type of package is the ADM3222ARUZ-REEL available in?
The device is available in a 20-TSSOP package.
- Does the ADM3222ARUZ-REEL conform to any specific standards?
Yes, it conforms to the EIA-232E and CCITT V.28 specifications.
- What is the significance of the Schmitt-trigger inputs in the receivers?
The Schmitt-trigger inputs with 0.4 V hysteresis ensure error-free reception for both noisy inputs and inputs with slow transition times.
