Features: ` 21nA Total RMS Noise
` 22k Differential Transimpedance
` 180MHz Bandwidth
` 60mW Typical Power Consumption
` 60A Peak Input Current
` Low, 85ps Pulse-Width DistortionApplication· FDDI
· 155Mbps ATMPinout
SpecificationsVCC......................................................................-0.5V to +7.0V
Continuous Current
IN.......................................................................................5mA
OUT+, OUT-......................................................................25mA
BYP ....................................................................................5mA
Continuous Power Dissipation (TA = +70°C)
SO (derate 5.88mW/°C above +70°C)..........................471mW
Storage Temperature Range .........................-65°C to +150°C
Lead Temperature (soldering, 10sec) ..........................+300°C
Operating Junction Temperature (die) ...........-55°C to +150°C
Processing Temperature (die) ......................................+400°C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
DescriptionThe MAX3963 is a low-noise transimpedance preamplifier for FDDI and 155Mbps ATM optical receivers. The MAX3963's dynamic range is optimized for use in multimode LED-based applications.
The preamplifier MAX3963 converts a small photodiode current to a differential voltage, with typical transimpedance of 22k. Input-referred noise of only 21nA allows detection of signals as small as 267nA, while pulse-width distortion is only 85ps with a 60A input signal. In a 1300nm multimode receiver, with responsivity of 0.7A/W, the MAX3963's dynamic range spans from -36dBm to -13.7dBm. The circuit operates from a single 5V supply, and typically consumes only 60mW power.
The MAX3963 die includes a filter connection, which provides positive bias for the photodiode through a 1k resistor to VCC. This feature, combined with the small die size, allows the MAX3963 to fit easily into a TO-style package with a photodiode.
The differential outputs of MAX3963 are back terminated with 60 per side, allowing the easy use of filters to improve sensitivity.
The MAX3963 is designed to be used with the MAX3964 limiting amplifier IC. It is available in an 8-pin SO package and as dice.
MAX3963 Data Sheet
