MAX3120ESA+T

The MAX3120 IrDA 1.2-compatible infrared transceiver is optimized for battery-powered, space-constrained applications. It consumes only 120µA while supporting data rates up to 115kbps over a wide 3V to 5.5V operating range, and features a 10nA shutdown mode to further extend battery life. The MAX3120 reduces the space required for IrDA applications by requiring a minimum of external components: photodiode, infrared LED, and current-setting resistor. Optical components are external to allow maximum flexibility in PC board design. The MAX3120 is available in 8-pin µMAX and SO packages. The µMAX package consumes half the board space of an 8-pin SO.

MAX3120 will operate at data rates of2.4kbps to 115kbps at distances from 1cm to 1m.

Because of its low-noise design, the MAX3120 achieves a bit error rate (BER) below 10-8 at maximum data rates when used with the appropriate external components. On-chip filtering rejects out-of-band ambient light signals that would otherwise interfere with IR communication. Also included in the MAX3120 is a high-power LED driver capable of sinking 200mA. It can drive most available IR LEDs at IrDA speeds of 2.4kbps to 115kbps.

Features

  1. IrDA 1.2 Compatible: 2.4kbps to 115.2kbps

  2. +3V to +5.5V Single-Supply Operation

  3. Flexible Optics Selection and Layout

  4. 120µA Supply Current

  5. 10nA Shutdown Supply Current

  6. 200mA, High-Current Infrared LED Drive

Applications

  1. IrDA Applications

  2. Personal Digital Assistants (PDAs)

  3. Palmtop Computers

  4. Cell Phones

  5. Hand-Held Equipment

  6. Peripherals