Overview
The ADM202EARU, produced by Analog Devices Inc., is a 2-channel RS-232 line driver/receiver pair designed to operate from a single 5 V power supply. This device is part of the ADM202 series, which is known for its high efficiency and compliance with TIA/EIA-232-E and V.28 specifications. The ADM202EARU integrates step-up voltage converters and level shifting transmitters and receivers on the same chip, utilizing an epitaxial BiCMOS construction to minimize power consumption and guard against latch-up.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Conditions/Comments |
|---|---|---|---|---|---|
| VCC | 5 | 6 | V | ||
| Output Voltage Swing | ±5 | ±9 | V | Loaded with 3 kΩ to GND | |
| Transmission Rate | 120 | kb/s | |||
| Power Dissipation | 10 | mW | |||
| Receiver Input Levels | ±3 | ±30 | V | ||
| ESD Protection | >2 kV | ||||
| Package Types | 16-lead PDIP, 16-lead SOIC (narrow and wide) |
Key Features
- Operates from a single 5 V power supply
- Highly efficient on-chip charge pump design allows for small 0.1 µF charge pump capacitors
- Generates ±10 V RS-232 output levels
- Meets or exceeds TIA/EIA-232-E and V.28 specifications
- Fast driver slew rates permit operation up to 120 kB/s
- High drive currents allow for extended cable lengths
- Low power BiCMOS construction: 10 mW power dissipation
- Overvoltage protection: receiver inputs can withstand continuous voltages in excess of ±30 V
- ESD protection to levels greater than 2 kV
- Internal 5 kΩ pull-down resistors on RS-232 inputs and 400 kΩ pull-up resistors on TTL/CMOS inputs
Applications
- Computers
- Peripherals
- Modems
- Printers
- Instruments
Q & A
- What is the power supply requirement for the ADM202EARU?
The ADM202EARU operates from a single 5 V power supply.
- What are the output voltage levels of the ADM202EARU?
The device generates ±10 V RS-232 output levels.
- What are the key specifications for transmission rate and power dissipation?
The transmission rate is up to 120 kB/s, and the power dissipation is 10 mW.
- Does the ADM202EARU have overvoltage protection?
- What type of ESD protection does the ADM202EARU have?
The device has ESD protection to levels greater than 2 kV.
- What are the package types available for the ADM202EARU?
The device is available in 16-lead PDIP and both narrow and wide 16-lead SOIC packages.
- What is the purpose of the internal charge pump capacitors?
The internal charge pump capacitors, as small as 0.1 µF, are used to generate the RS-232 output levels.
- Does the ADM202EARU meet industry standards for RS-232 interfaces?
- What are some common applications for the ADM202EARU?
Common applications include computers, peripherals, modems, printers, and instruments.
- How does the ADM202EARU handle latch-up and power consumption?
The epitaxial BiCMOS construction minimizes power consumption to 10 mW and guards against latch-up.
