Description

The AD8015 is a wide bandwidth, single supply transimpedance amplifier optimized for use in a fiber optic receiver circuit. It is a complete, single chip solution for converting photodiode current into a differential voltage output. The 240 MHz bandwidth enables AD8015 application in FDDI receivers and SONET/SDH receivers with data rates up to 155 Mbps. This high bandwidth supports data rates beyond 300 Mbps. The differential outputs drive ECL directly, or can drive a comparator/ fiber optic post amplifier.

In addition to fiber optic applications, this low cost, silicon alternative to GaAs-based transimpedance amplifiers is ideal for systems requiring a wide dynamic range preamplifier or singleended to differential conversion. The IC can be used with a standard ECL power supply (–5.2 V) or a PECL (+5 V) power supply; the common mode at the output is ECL compatible. The AD8015 is available in die form, or in an 8-pin SOIC package.

Chip features

Differential output
Low cost, wide bandwidth, low noise
Bandwidth: 240 MHz
Pulse Width Modulation: 500 ps
Rise/fall time: 1.5ns
Input current noise: 3.0 pA/VHz (100 MHz)
Total input rms noise: 26.5 nA (100 MHz).
Wide dynamic range
Light sensitivity: -36 dBm (155.52 Mbps)
Peak input current: ±350 HA
Low power consumption: 25 mA (5 V)
Wide operating temperature range: -40″ C to +85C

Chip application

Fiber Optic Receiver: SONET/SDH, FDDI, Fibre Channel
Stable running high capacitance detector
Low noise preamplifier
Single-ended to differential conversion
1-V voltage converter