GN8062 GaAs MMICs GN8062 GaAs IC Unit : mm 8 High-speed switching 2 7 ● High output 3 6 Pulse current and DC bias current can be controlled. 4 5 ● 0.7min. 6.4±0.2 4.5max. 4.0max. 1.3typ. 1 ● 10max. 2.54±0.25 ■ Features 0.5 For semiconductor laser drive ■ Absolute Maximum Ratings (Ta = 25˚C) Parameter Symbol Power supply voltage Pin voltage Rating VDD 6 V VSS –6 V VIN – 0.5 to VDD–1.5 V 1.5 to VDD V VDD V VIp *5 IDD *4 50 mA ISS 40 mA Output current IOUT 145 mA Allowable power dissipation PD* 2 700 mW Channel temperature Tch 150 ˚C Storage temperature Tstg – 55 to +150 ˚C –10 to +75 ˚C Operating ambient temperature *1 *2 *3 *4 *5 Topr 7.62±0.2 0 to 15˚ VOUT* 1 Power current 1 : GND 2 : NC 3 : NC 0.35max. 4 : OUT 5 : VIP 6 : VDD 7 : VIN 8 : VSS 8-Lead Plastic DIL Package Unit *3 Do not apply the voltage higher than the set VDD. Guaranteed value of the unit at Ta= 25˚C. Range in which the IC circuit function operates and not the guaranteed range of electric characteristics. IDD is a current when the pulse output current is zero. Voltage when the constant current source has been connected. ■ Electrical Characteristics (Ta = 25˚C) Parameter Pulse output current Supply current Input voltage Symbol Test circuit Ipmax. 1 Condition VDD= 5V, VSS= –5V, VIN= 2V, I p=120mA, RL=10Ω Min Typ 100 120 Max Unit mA Ipmin. 1 VDD = 5V, VSS= –5V, VIN= 0.4V, Ip=120mA, RL=10Ω 1 5 IDD* 1 2 VDD= 5V, VSS= – 5V, VIN= 0.4V 35 50 mA ISS 2 Ip= 0, RL=10Ω 25 40 mA VIH 2.5 VIL mA V 0.4 V Rise time tr* 2 3 VDD= 5V, VSS= – 5V, I p=100mA 7 ns Fall time tf* 2 3 RL=10Ω 5 ns GN8062 GaAs MMICs *1 The current value to be supplied from the 5V power supply is a total sum of this value plus the pulse output current and bias output current. *2 Waveform of input and output signals Input signal Output waveform 2µS 90% 10µS 2.5V min. 10% 0.4V max. tr * tr ··· 10% to 90% tf ··· 90% to 10% Test circuit 1 Test circuit 2 VIN 0.4V 5V C1 + – C2 –5V C1 tf The rise/fall time of the input signal is 2ns (10 to 90%) – + C2 –5V C1 – + C2 + – C2 A A IP=0mA IP=120mA 8 7 6 5 8 7 6 5 1 2 3 4 1 2 3 4 RL A RL + 5V – C2 C1 C1 Test circuit 3 PULSE GENERATOR –5V C1 5V C1 R2 + – C2 – + C2 5V C1 IP=100mA 8 7 6 5 1 2 3 4 R1 C1 FET PROBE + 5V – C2 C1 : 0.1µF C2 : 3.3µF R1 : 10Ω R2 : 50Ω + 5V – C2 GN8062 GaAs MMICs ■ Block Diagram INSIDE GN8062 OUTSIDE GN8062 VDD VIN +5V VSS LASER DIODE VSS VDD OUT VSS VSS GND 1 8 VSS NC 2 7 VIN NC 3 6 VDD OUT 4 5 VIP VIP from CONTROL CIRCUIT ■ Caution for Handling 1) The recommended VIN voltage is 2.5 to 3V for [H] and 0 to 0.4V for [L]. 2) Do not apply VIN while the power supply is OFF. 3) For the current source to be connected to the V IP pin, use a Si bipolar transistor as shown in the circuit diagram. (Example: 2SD874) To connect a resistor to the emitter or collector, use a resistor of a few ohm. The use of higher resistor may cause large change in the voltage at the V IP pin, and may make the output waveform distortion. (See the pulse output current control example). To use another current control circuit, set so that the VIP pin voltage becomes around 2V. 4) When mounting, minimize the connection distance between the semiconductor laser and IC, and use the chip parts (C, R) of less parasitic effects. 5) Attention to damage by the power surge (see the example connection of the pin protection circuit). During handling, take care to ground the human body and solder iron tip. 6) When the power supply is turned ON and OFF, set the current value of the current source connected to the VIP pin to zero. This is important to prevent the large current flow through the semiconductor laser during power ON/OFF. When the power supply is ON, be sure to turn ON VDD, after VSS is completely equal to – 5V. When the power supply is OFF, be sure to turn OFF VSS, after VDD is completely 0V. 7) Pay attention to release the heat. MA3068(VZ=6.8V,Cd=85pF,RZ=6Ω) GN8062 –5.0V GND VSS NC VIN NC VDD 200Ω to 2kΩ 5.0V 50Ω OUT VIP Connection example of pin protection circuit GN8062 GND VSS NC VIN NC VDD OUT VIP – + I COLLECTOR IB 0.22mF 5Ω VEE=–5 to 0V Example of pulse output current control circuit