This application note presents a simple shunt peaking technique that significantly improves LED eye quality and edge speed. The use of Long Wave LEDs is particularly attractive for low data rate, low power applications where cost is a critical parameter. The MAX3967A is a programmable LED driver for fiber optic transmitters operating at data rates up to 270Mbps. The circuit contains a high-speed current driver with programmable temperature coefficient (tempco), adjustments for LED pre-bias voltage, and a disable feature. The circuit accepts PECL data inputs, and operates from a single +2.97V to +5.5V power supply.