This document describes the typical operating circuit of ADM211. ADM211 is a +5V powered CMOS RS-232 driver/receiver with a data rate of 120 kB/s and low power consumption. It also includes DC-DC converters and voltage doubler/inverter, providing an output voltage range of -10V to +10V. The product is suitable for applications such as computers, peripherals, modems, printers, and instruments.
The ADM2xx family of CMOS RS‑232 drivers/receivers is designed for EIA‑232‑E and V.28 interfaces, especially where a +12 V supply is unavailable. The devices operate from a single +5 V supply and include internal charge‑pump converters that generate the required ±10 V RS‑232 levels.
Key features include low‑power shutdown (down to 5 pW), active receivers in shutdown for the ADM213, and a range of package options (DIP, SOIC, SSOP). The datasheet lists detailed electrical specifications, pin functions, ordering information, and mechanical dimensions for each model.
| Output Voltage Swing | 15‑49 V |
|---|---|
| Shutdown Supply Current | 5 pA |
| Input Logic Threshold Low | 0.8 V |
| RS‑232 Input Voltage Range | -30 V to +30 V |
| Operating Temperature Range (Industrial) | -40 °C to +85 °C |
The shutdown supply current is specified as 5 pA.
Two receivers stay active in shutdown for the ADM213.