Overview
The ADM3222ARWZ is a high-speed, 2-channel RS-232/V.28 interface transceiver manufactured by Analog Devices Inc. This device is designed to operate from a single 3.3 V power supply, making it ideal for battery-powered portable instruments due to its low power consumption and shutdown facility. The ADM3222ARWZ conforms to the EIA-232E and CCITT V.28 specifications and supports data rates up to 460 kbps, making it suitable for high-speed data links and modern ISDN modem standards.
Key Specifications
| Parameter | Description |
|---|---|
| Power Supply | Single 3.3 V |
| Data Rate | Up to 460 kbps |
| Interface Standard | EIA-232E, CCITT V.28 |
| Transmitter Inputs | TTL/CMOS levels |
| Transmitter Outputs | RS-232 signal levels (typically ±9 V) |
| Receiver Inputs | RS-232 signal levels with internal 5 kΩ pull-down resistor |
| Receiver Outputs | CMOS output logic levels |
| Shutdown Current | Less than 0.5 μA |
| Charge Pump Capacitors | Four external 0.1 μF capacitors (up to 47 μF can be used) |
| Overvoltage Protection | Up to ±30 V |
Key Features
- Low power consumption and shutdown facility, ideal for battery-powered devices.
- Operates from a single 3.3 V power supply using a charge pump voltage converter.
- High slew rates supporting data rates up to 460 kbps.
- Compliance with EIA-232E and CCITT V.28 specifications.
- CMOS technology for minimal power dissipation.
- Receiver enable (EN) and shutdown (SD) inputs for power management.
- Schmitt-trigger inputs with 0.4 V hysteresis for error-free reception.
- Overvoltage protection up to ±30 V on RS-232 inputs.
Applications
- Battery-powered portable instruments.
- High-speed data links.
- ISDN modem standards requiring data rates of 230 kbps.
- Industrial automation and control systems.
- Medical devices requiring low power and high reliability.
- Telecommunication equipment.
Q & A
- What is the power supply requirement for the ADM3222ARWZ?
The ADM3222ARWZ operates from a single 3.3 V power supply.
- What are the supported data rates for the ADM3222ARWZ?
The device supports data rates up to 460 kbps.
- What interface standards does the ADM3222ARWZ conform to?
The device conforms to EIA-232E and CCITT V.28 specifications.
- How does the shutdown facility work on the ADM3222ARWZ?
The SD input can power down the charge pump and transmitter outputs, reducing the quiescent current to less than 0.5 μA. The receivers remain enabled during shutdown unless disabled using the EN input.
- What type of inputs and outputs does the ADM3222ARWZ have?
The transmitter inputs accept TTL/CMOS levels, and the transmitter outputs are RS-232 signal levels. The receiver inputs accept RS-232 signal levels, and the receiver outputs are CMOS logic levels.
- What is the purpose of the charge pump capacitors in the ADM3222ARWZ?
The charge pump capacitors (four external 0.1 μF capacitors) are used for the voltage doubler/inverter, allowing operation from a single 3.3 V supply.
- Does the ADM3222ARWZ have overvoltage protection?
- What is the significance of Schmitt-trigger inputs in the ADM3222ARWZ?
The Schmitt-trigger inputs with 0.4 V hysteresis ensure error-free reception for both noisy inputs and inputs with slow transition times.
- In what types of applications is the ADM3222ARWZ commonly used?
The device is commonly used in battery-powered portable instruments, high-speed data links, ISDN modem standards, industrial automation, medical devices, and telecommunication equipment.
- How does the ADM3222ARWZ manage power consumption?
The device uses CMOS technology to minimize power dissipation and features a shutdown facility to reduce quiescent current to less than 0.5 μA.
