Overview
The ADM222AR, produced by Analog Devices Inc., is a high-speed RS-232 line driver/receiver that operates from a single 5 V power supply. This device is part of the ADM222, ADM232A, and ADM242 family, which offers transmission rates up to 200 kB/s. It integrates two RS-232 drivers and two RS-232 receivers, making it suitable for various communication applications. The ADM222AR is fabricated using BiCMOS technology, combining low power CMOS with high-speed bipolar circuitry to achieve high transmission rates while minimizing power consumption.
Key Specifications
| Specification | Value |
|---|---|
| Transmission Rate | Up to 200 kB/s |
| Power Supply | Single 5 V (4.5 V to 5.5 V) |
| Number of Drivers/Receivers | 2 Drivers / 2 Receivers |
| Duplex | Full |
| Receiver Hysteresis | 400 mV |
| Operating Temperature | -40°C to +85°C |
| Package | 18-SOIC (0.295", 7.50mm Width) |
| Mounting Type | Surface Mount |
| RS-232 Output Levels | Typically ±9 V |
| RS-232 Input Levels | Up to ±30 V |
| External Capacitors | Four 0.1 µF capacitors for charge pump |
Key Features
- High-speed transmission rates up to 200 kB/s
- Single 5 V power supply with on-chip charge pump using small (0.1 µF) external capacitors
- Two RS-232 drivers and two RS-232 receivers
- BiCMOS technology combining low power CMOS with high-speed bipolar circuitry
- Internal 400 kΩ pull-up resistors on TTL/CMOS inputs and internal 5 kΩ pull-down resistors on RS-232 inputs
- Active low shutdown (SHDN) input to minimize power consumption
- Active low enable (EN) input on ADM242 to control receiver outputs
- Meets all EIA-232-E and V.28 specifications
Applications
- Computers and peripherals
- Modems
- Printers
- Instruments
Q & A
- What is the transmission rate of the ADM222AR?
The transmission rate of the ADM222AR is up to 200 kB/s. - What is the power supply requirement for the ADM222AR?
The ADM222AR operates from a single 5 V power supply (4.5 V to 5.5 V). - How many drivers and receivers does the ADM222AR have?
The ADM222AR has two RS-232 drivers and two RS-232 receivers. - What is the operating temperature range of the ADM222AR?
The operating temperature range is -40°C to +85°C. - What type of package does the ADM222AR come in?
The ADM222AR comes in an 18-SOIC package. - What are the typical RS-232 output levels of the ADM222AR?
The typical RS-232 output levels are ±9 V. - What are the maximum RS-232 input levels the ADM222AR can accept?
The ADM222AR can accept RS-232 input levels up to ±30 V. - What external components are required for the charge pump?
Four 0.1 µF capacitors are required for the charge pump. - How does the ADM222AR minimize power consumption?
The ADM222AR has an active low shutdown (SHDN) input to disable the device and minimize power consumption. - Is the ADM222AR RoHS compliant?
Yes, the ADM222AR is RoHS compliant.
