ADM208ANZ

Overview

The ADM208ANZ is a CMOS RS-232 line transceiver from Analog Devices, designed for EIA-232-E and V.28 interfaces using a single +5 V supply. It integrates four drivers and four receivers with on-board DC-to-DC converters that generate ±10 V internally. The device supports data rates up to 120 kB/s and operates within an industrial temperature range of -40°C to +85°C. It utilizes a 24-lead Plastic Dual In-Line Package (PDIP). Key electrical parameters include a typical power supply current of 9 mA, an output voltage swing of ±9 V under load, and receiver input levels capable of withstanding ±30 V.

Feature Summary

• Integrates dual charge pump voltage converters to generate required RS-232 voltages from a single 5 V source without external inductors.
• Features Schmitt-trigger inputs on all receivers to provide noise immunity and ensure error-free reception during slow signal transitions.
• Includes internal pull-up resistors on driver inputs and pull-down resistors on receiver inputs to define logic states when pins are unconnected.
• Provides high noise immunity through built-in hysteresis on the receiver stages.

Applications

• Computers
• Peripherals
• Modems
• Printers
• Instruments

Procurement Notes

Verify the specific package variant against design requirements, as the ADM208 family includes SOIC and SSOP options alongside the PDIP version. Confirm RoHS compliance status if environmental regulations apply to the assembly process. Check for obsolescence notices or lifecycle changes directly from Analog Devices documentation before finalizing component selection.

Selection Notes

Select the ADM208ANZ when a full-duplex interface with four independent transmit and receive channels is required. This part lacks the shutdown control pin found in the ADM206 or ADM211; therefore, it is unsuitable for battery-powered applications requiring low-power standby modes. Ensure the application does not require active receiver monitoring during power-down states.

Part Context

The ADM208 belongs to the ADM2xx family of RS-232 transceivers, which serves as an enhancement over the legacy AD2xx series. These components are designed to be pin-compatible with MAX206-MAX213 derivatives, facilitating direct upgrades in existing designs. The family standardizes the use of small ceramic capacitors for internal voltage generation.

Replacement Considerations

The ADM208ANZ is functionally equivalent to the ADM208AN. Other variants such as the ADM208ARZ offer the same electrical performance in a surface-mount SOIC package. Cross-referencing with MAX208 devices confirms pin compatibility, though specific electrical tolerances should be verified against the target datasheet.