The KGL4126FA is a high performance Mach Zehnder Modulator driver for SONET/SDH and 10GbE applications up to 10.7Gb/s. The device provides a single-ended output voltage > 6Vpp, output amplitude control, and duty cycle (X-Point) control. The KGL4126FA data input accepts single ended or differential AC-coupled signals. External Capacitors for AC Termination and Blocking Capacitors are Required. The device provides a minimum of 6 Vpp output voltage AC coupled to a 50-ohm load. The output amplitude can be tuned by varying VD, which is supplied at the output port using an external Bias-T. The KGL4126FA is capable of adjusting the crossing point (X-point) from 45% to 55% of the output eye diagram via the differential voltage between VB1 and VB2. The device specifications are guaranteed for all crossing points from 45% to 55%. The KGL4126FA is packaged in a high performance 20-pin 12mm QFP package.
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OKI Electric Industry KGL4126FA technical specifications.
| Supply Voltage (Absolute Max) | Min: -6.5, Max: 0.3V |
| X-Point Control Voltage (Absolute Max) | Min: VS-4.5 (Min. -6.5), Max: VS+2.0 (Max. 0.3)V |
| Current Source FET Gate Bias Voltage (Absolute Max) | Min: -6.5, Max: VS+1.2 (Max. 0.3)V |
| DC Bias for Output Stage Amplifier (Absolute Max) | Min: 0, Max: 5.0V |
| Operating Temperature at Package Base (Absolute Max) | Min: -10, Max: 100°C |
| Storage Temperature (Absolute Max) | Min: -40, Max: 125°C |
| Supply Voltage (Recommended) | Min: -5.46, Max: -4.94V |
| DC Bias for Output Stage Amplifier (Recommended) | Min: 2.0, Max: 4.0V |
| X-Point Control Voltage (Recommended) | Min: VS+1.1, Max: VS+1.5V |
| Current Source FET Gate Bias Voltage (Recommended) | Min: VS, Typ: VS+0.85, Max: VS+1.0V |
| Input Amplitude (Differential, Recommended) | Min: 0.25, Max: 1Vpp |
| Input Amplitude (Single - Ended, Recommended) | Min: 0.5, Max: 1Vpp |
| Operating Temperature at Package Base (Recommended) | Min: 0, Max: 70°C |
| Input Interface (Recommended) | AC coupled (External blocking capacitor is required) |
| Output Interface (Recommended) | AC coupled (External Bias-T is required for VD) |
| Input Data Rate (Electrical) | 10.7Gbps |
| Supply Current of VS (Iss, Electrical) | Typ: 210, Max: 250mA |
| Supply Current of VD (Id, Electrical) | Typ: 90, Max: 130mA |
| Output Amplitude (Max) (Vo (Max), Electrical) | 6.0Vpp |
| X-Point Control (Xp, Electrical) | Min: 45, Max: 55% |
| Output Rise/Fall Time (Tr/Tf, Electrical) | Typ: 40ps |
| Input Return Loss (S11, Electrical) | Min: 13dB |
| Material Safety | Contains Arsenic (As) compounds. Potentially hazardous if ingested, fractured, burned, or chemically treated. Disposal must follow relevant laws. |
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