ADM101EARMZ-REEL

Overview

The ADM101EARMZ-REEL is a single-channel RS-232 transceiver from the Analog Devices Craft Port series, designed for portable applications. It operates from a single 5 V supply and utilizes an on-chip charge-pump DC-DC converter to generate a negative supply voltage, eliminating the need for external negative rails. The device supports transmission rates up to 460 kbit/s with ±4.2 V output swing. Key electrical parameters include a typical supply current of 500 μA and an ultralow power shutdown mode consuming less than 1 μA. It features overvoltage protection on receiver inputs exceeding ±30 V and ESD protection greater than 15 kV. The component is housed in a 10-lead MSOP package.

Feature Summary

• Integrated charge-pump DC-DC converter generates internal negative supply from a single positive rail.
• Ultralow power shutdown mode disables the charge pump and transmitter while keeping the receiver active.
• Receiver inputs feature Schmitt trigger action with hysteresis for noise immunity and slow transition tolerance.
• High overvoltage protection allows receiver inputs to withstand continuous voltages beyond standard RS-232 levels.

Applications

• Mobile telephones
• Palmtop computers
• Personal digital assistants (PDAs)
• Portable instrumentation
• GPS receivers

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and reel specifications. Ensure the selected variant matches the required temperature range and RoHS compliance status for the intended deployment environment. Cross-reference the part number with the latest datasheet revision to confirm pinout compatibility and functional equivalence before finalizing procurement orders.

Selection Notes

Select this component when designing serial communication interfaces for battery-powered devices requiring minimal external passive components. The integrated charge pump reduces bill-of-materials count by removing the need for dual-rail power supplies. Evaluate the 460 kbit/s data rate limit against application requirements. Consider the automotive-grade variants if the deployment environment demands higher reliability standards or specific manufacturing controls defined in the automotive product section.

Part Context

The ADM101E belongs to the Analog Devices Craft Port series, which focuses on compact, low-power interface solutions for space-constrained electronics. This series enables full RS-232 functionality using only small external capacitors. The device represents a transition toward simplified power architectures in portable computing hardware, replacing traditional multi-supply designs with efficient single-rail implementations.

Replacement Considerations

The ADM101EARMZ-REEL7 serves as a direct packaging alternative within the same functional family. Automotive-qualified versions are designated with the 'W' suffix in the model name. Verify pinout and electrical specifications when substituting with other single-channel RS-232 transceivers to ensure compatibility with existing PCB layouts and power constraints.