SP8036

Solved by SP8036 TM APC Amplifier with Integrated Photodiode and Gain Adjust Capability FEATURES • • • • • • • • Dual wavelength 650nm and 780nm 13 ns Settling Time to 2% 100 MHz Bandwidth at -3dB 10 mV Output Offset Voltage o 25 µV/ C Output Offset Voltage Drift ± 6 dB External Gain Adjust Small 8-pin OPLGA package Power-down mode Vref 1 Rgain1 2 Rgain2 3 __ CE 4 SP8036 8-Pin OPLGA 8 Vcc 7 Gain 6 Vout 5 Gnd APPLICATIONS CD-R, and CD-RW DVD+/-R, DVD+/-RW, and DVDRAM GENERAL DESCRIPTION The SP8036 represents the next generation in Automatic Power Control (APC) amplifiers designed specifically for demanding pick-up head applications. With its integrated photo detector, the SP8036 monitors light intensity of the laser diode in CD-R, CD-RW, DVD+/-R, DVD+/-RW, and DVD-RAM assemblies and converts this light to an output voltage. The magnitude of this voltage signal corresponds to the laser power intensity and is subsequently fed back to the laser diode driver to control the laser output power. The SP8036 on-chip photo detector transforms incident laser light into a proportional current, which is then converted to a voltage through a transimpedance amplifier. Adjustable gain is provided in the transimpedance amplifier by means of a gain control loop that is controlled by an external resistor. This external resistor is not a part of the signal path, which greatly reduces the effects of all parasitic capacitances and inductances on the flex cable at these pins. The signal is then buffered to provide reactive load drive capability. The SP8036 achieves an unparalleled level of performance by combining excellent DC stability and low noise with outstanding AC performance. This level of performance is achieved using a proprietary fully complimentary BICMOS process with fully integrated, on-board photo detector. The SP8036 is offered with a nominal sensitivity 4450 V/W and is packaged in a 3.0 x 3.5 mm, 8-lead OPLGA package. All input logic levels should not be left open at any time. The SP8036 offers power-down capability with the new active-low chip enable pin, CE. The chip operates normally when this pin is connected to GND and powers down when connected to Vcc. Rev 0.8 (09/25/06) SP8036 APC Amplifier  2006 Sipex Corporation page 1 of 6 FUNCTIONAL DIAGRAM Figure 1: Functional Diagram ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. Supply Voltage (Vcc)……………….……...……..6.0V All Other Pins…………. …….……………...…… 6.0V o Junction Temperature (TJ)……….…..…………120 C Storage Temperature…………….....-40°C to +100°C Soldering Temperature……….….……………+235°C RECOMMENDED OPERATING CONDITIONS Supply Voltage (Vcc)………..…………...4.5V to 5.5V Reference Voltage (VREF) ….……………1.9V to 2.3V o Operating temperature…….……………-20 to +85 C THERMAL SPECIFICATIONS 8-pin OPLGA (3 x 3.5mm) Package Thermal Resistance…………90 C/W o Rev 0.8 (09/25/06) SP8036 APC Amplifier  2006 Sipex Corporation page 2 of 6 ELECTRICAL/OPTICAL SPECIFICATIONS Unless otherwise noted: 4.5V ≤ Vcc ≤ 5.5V, VREF =2.1V, output load: RL = 1kΏ to VREF, CL = 20pF to GND, RGAIN = o o 400ohm, ambient temperature -20 C ≤TA ≤ +85 C Parameter Supply Voltage Supply Current Voltage Reference Range Output Offset Voltage Output Offset Voltage Drift Power Supply Rejection Ratio (PSRR) * Gain Switch Logic Levels Output Sensitivity Input Optical Power required to produce a 1.5V output swing Photo Detector Active Area Output Sensitivity Change vs. Vcc Output Sensitivity Change vs. Temperature Output Noise (+6 dB) Output Slew Rate Output Settling Time to 2% of finale value (1.5V step) Full Scale Output Voltage Swing Output Overshoot Bandwidth (-3dB) Vcc = 5.0V Gain Adjust Range at Vcc = 4.5V Conditions TA = 25 C, no signal o -20 ≤TA ≤ +85 C, no signal RGAIN = 400ohm Referenced to VREF RGAIN = 400ohm RGAIN = 950ohm RGAIN = 400ohm, 4.5V ≤ Vcc ≤ 5.5V RGAIN = 950ohm, 4.5V ≤ Vcc ≤ 5.5V Logic level low Logic level high Any Select Mode. Laser Beam Diameter = 0.70mm, uniform density (RGAIN = 400ohm) Any Select Mode RGAIN = 400ohm RGAIN = 950ohm RGAIN = 950ohm 1kHz ≤ BW ≤ 1MHz 1kHz ≤ BW ≤ 100MHz -6dB 0dB +6dB Referenced to VREF VOUT=1.5V step RGAIN = 400ohm 150ohm≤RGAIN≤950ohm 250ohm≤RGAIN≤950ohm o Min 4.5 Typ 5 13 2.1 Max 5.5 18 25 2.3 10 25 50 Units V mA V mV µV/ C dB o 1.9 -10 -25 -50 55 50 2.4 73 75 0.8 V V/W mW 4450 0.34 0.25 5 0.1 0.14 1.28 190 12.6 13.1 14.0 -1.7 100 +6 +6 2 5 15 15 15 5 70 -6 -3 mm %/V o 2 %/ C mV V/µs ns Vp-p % MHz dB -1.5 * PSRR = 20log (∆Vcc/∆VOUT), where VOUT is the output voltage without signal (offset voltage) PIN ASSIGNMENTS Pin # 1 2 3 4 5 6 7 8 Pin Name Vref Rgain1 Rgain2 CE GND Vout Gain Vcc Pin Function Reference Voltage Gain Adjust Resistor RGAIN1 connection point Gain Adjust Resistor RGAIN2 connection point Active low Chip enable Power Ground Output Voltage Gain Switch Input. Low level or Open selects pin RGAIN1, high level selects pin RGAIN2 Supply Voltage. Bypass to GND with ceramic capacitor 0.1µF Rev 0.8 (09/25/06) SP8036 APC Amplifier  2006 Sipex Corporation page 3 of 6 PHOTO DETECTOR PATTERN Rev 0.8 (09/25/06) SP8036 APC Amplifier  2006 Sipex Corporation page 4 of 6 OPLGA 8-pin PACKAGE DIMENSIONS Rev 0.8 (09/25/06) SP8036 APC Amplifier  2006 Sipex Corporation page 5 of 6 ORDERING INFORMATION Part number SP8036DG4 Temperature range 0 -20 + 85 C Package Type 8-pin OPLGA Rev 0.8 (09/25/06) SP8036 APC Amplifier  2006 Sipex Corporation page 6 of 6