Overview
The ADM232LJN is a RS-232 interface IC produced by Analog Devices Inc. It is part of the ADM2xxL family, designed to meet all EIA-232-E and V.28 specifications. This component is particularly useful in applications where a single 5 V power supply is available, and it features internal charge pump voltage converters to generate the necessary ±10 V for RS-232 output from the 5 V input.
The ADM232LJN is known for its low power consumption, high data rate, and compact design, making it suitable for a variety of electronic devices including computers, peripherals, modems, printers, and instruments.
Key Specifications
| Parameter | Value |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V |
| Number of Drivers | 2 |
| Number of Receivers | 2 |
| Data Rate | 120 kbps |
| RS-232 Input Voltage Range | –30 V to +30 V |
| RS-232 Input Threshold Low | 0.8 V to 1.2 V |
| RS-232 Input Threshold High | 1.6 V to 2.4 V |
| RS-232 Input Hysteresis | 0.65 V |
| RS-232 Output Short-Circuit Current | ±10 mA |
| Low Power Shutdown Current | ≤ 1 µA |
| Propagation Delay | 0.3 µs |
| Output Enable Time (TEN) | 250 ns |
| Output Disable Time (TDIS) | 50 ns |
Key Features
- Single 5 V power supply with on-board DC-DC converters to generate ±10 V for RS-232 output.
- Meets all EIA-232-E and V.28 specifications.
- 120 kbps data rate.
- ±9 V output swing with 5 V supply.
- Small 1 µF capacitors required.
- Low power shutdown mode with current less than 1 µA.
- ±30 V receiver input levels.
- Latch-up free operation.
- Plug-in upgrade for MAX223/230-241 and AD230–AD241.
Applications
- Computers and peripherals.
- Modems.
- Printers.
- Instruments.
- Battery-powered equipment due to low power shutdown mode.
Q & A
- What is the supply voltage range for the ADM232LJN?
The supply voltage range for the ADM232LJN is 4.5 V to 5.5 V.
- What is the data rate of the ADM232LJN?
The data rate of the ADM232LJN is 120 kbps.
- What are the RS-232 input voltage levels for the ADM232LJN?
The RS-232 input voltage range is –30 V to +30 V.
- Does the ADM232LJN have low power shutdown mode?
- What are the typical applications of the ADM232LJN?
The ADM232LJN is typically used in computers, peripherals, modems, printers, and instruments.
- Does the ADM232LJN require external components for operation?
No, the ADM232LJN does not require any external components for its operation, especially useful in applications where PCB space is critical.
- What is the propagation delay of the ADM232LJN?
The propagation delay of the ADM232LJN is 0.3 µs.
- Is the ADM232LJN latch-up free?
- Can the ADM232LJN be used as a plug-in upgrade for other devices?
- What is the output short-circuit current of the ADM232LJN?
The output short-circuit current of the ADM232LJN is ±10 mA.
