Features: · Single 3.3V Power Supply
· 72mA Supply Current
· 3.4GHz Small-Signal Bandwidth
· 0.26mVRMS Input-Referred Noise
· 6mVP-P to 1200mVP-P Input Range (46dB)
· Input Signal Detect with Programmable Threshold
· RSSI (Linear Up to 100mVP-P)
· Adjustable Output Amplitude
· 0.2dB Output Voltage Variation (Over 16dB Input Signal Variation)Application·OC-48/STM-16 Transmission Systems
·WDM Optical Receivers
·Long Reach Optical Receivers
·Continuous Rate ReceiversPinout
SpecificationsSupply Voltage ........................................................-0.5V to +4.0V
Voltage at IN+, IN- .............................(VCC - 1.5V) to (VCC + 0.5V)
Voltage at CZ+, CZ-, CG+,
CG-, CD+, CD-.....................................(VCC - 3.5V) to (VCC + 0.5V)
Voltage at SC, SD, EN, TH,
OSM, VREF, and RSSI....................................-0.5V to (VCC + 0.5V)
CML Input Current at IN+, IN-..............................................25mA
CML Output Current at OUT+, OUT- ....................................25mA
Storage Temperature Range ..........................-55°C to +150°C
Operating Junction Temperature Range..........-55°C to +150°C
Lead Temperature (soldering, 10s) ............................... +300°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 MAX3861 is a low-power amplifier with automatic gain control (AGC), designed for WDM transmission systems employing optical amplifiers and requiring a vertical threshold adjustment after the post amp. Operating from a single 3.3V supply, this AGC amplifier MAX3861 linearly amplifies/attenuates the input signal while maintaining a fixed output-voltage swing at data rates up to 2.7Gbps. Both the input and output are on-chip terminated to match 50Ω interfaces.
This amplifier has a small-signal bandwidth of 3.4GHz and an input-referred noise of 0.26mVRMS. Over an input signal range of 6mVP-P to 1200mVP-P (46dB), the MAX3861 delivers a constant output amplitude that is adjustable from 400mVP-P to 920mVP-P. Variation in output swing is controlled within 0.2dB over a 16dB input range. The MAX3861 provides a received-signalstrength indicator (RSSI) that is linear, within 2.5%, for input signal levels up to 100mVP-P and an input signal detect (SD) with programmable threshold.
MAX3861 Data Sheet
