PDIC for Blu-ray Disc Player CXA2958EN Description The CXA2958EN is a PDIC (photodetector IC) developed as a photodetector for optical pickups of Blu-ray disc players. This IC has the photodetector area separately for BD/DVD and CD. Therefore, the optical pickup can be configured with the minimum number of parts using the two-wavelength one package laser diode. (Applications: Optical pickups for Blu-ray disc players) Features ◆ CD/DVD/BD three wavelengths supported (Blue laser + CD/DVD two-wavelength laser configuration) ◆ Gain switching function (0 dB, 9 dB and 15 dB) ◆ High sensitivity photodiode (0.285 A/W @ 405 nm) ◆ Low noise amplifier ◆ Reflow mounting possible Package Open photodetector type resin molded ultra-small package (18 pin) Structure CMOS silicon monolithic IC 1 CXA2958EN Absolute Maximum Ratings (Ta = 25 °C) ・ Supply voltage VCC 5.7 V ・ Operating temperature Topr -10 to +80 °C ・ Storage temperature Tstg -40 to +125 °C ・ Allowable power dissipation PD 400 ・ Supply voltage 1 VCC 4.5 to 5.5 V ・ Supply voltage 2 Vc 1.65 to 2.5 V ・ SW select voltage range (Low) Vsw 0 to 0.4 V ・ SW select voltage range (Middle) Vsw 1.3 to 2.0 V ・ SW select voltage range (High) Vsw 2.5 to VCC V mW Operating Conditions Output Sensitivity Table Gain Gain ratio [dB] Output sensitivity [mV/µW] Sub Main RF± Blue DVD CD Blue DVD CD Blue DVD CD High gain 15 69.9 91.7 129.9 394.8 518.3 733.9 35.0 45.9 65.0 Middle gain 9 35.0 45.9 45.6 197.9 259.5 257.6 17.5 23.0 22.8 Low gain 0 12.3 16.1 ― 69.4 91.2 ― 6.15 8.07 ― Sleep ― Hi-Z Hi-Z Hi-Z The sensitivity table is specified according to the measurement conditions of electrical and optical characteristics. Note) The output sensitivity ratio is as shown right. 405 nm : 650 nm : 780 nm = 1 : 1.312 : 1.302 2 CXA2958EN Mode Setting SW1 SW2 Mode Gain H High gain M H Blue mode L Low gain H High gain M M Middle gain DVD mode Middle gain L Low gain H High gain CD mode M L Middle gain L Sleep Hi-Z SW3 Sub PD mode H Blue/DVD-differential astigmatism L Blue/DVD-DPP Note) SW1 to SW3 internal pull-down resistor: 50 kΩ SW1: Mode switching SW2: Gain switching SW3: Sub PD switching Photodetector Switching Connected PD Pin name Blue/DVD-differential CD mode Blue/DVD-DPP mode astigmatism mode A a A B b B C c C D d D E e+h e+i E F f+g g+k F G i +l h+l G H j+k f+j H RF+ + 0.5 × (a + b + c + d) + 0.5 × (A + B + C + D) RF- - 0.5 × (a + b + c + d) - 0.5 × (A + B + C + D) 3 CXA2958EN Block Diagram Vcc 10 8 GND1 2 9 GND2 + - 5 E + - 4 F + - 16 G + - 15 H Vc Ao A + - + - 6 a A Bo + - + - B 12 b B Co + - + - C 11 c e h i E + - f g k F + - l + - C G Do D 7 + - + - d + - j D H RF+ 13 + - Ao Bo Co Do 3 SW1 50 kΩ Reference voltage 1.6 V 17 SW2 50 kΩ RF- 14 + - 18 SW3 Reference voltage 2.9 V 50 kΩ Ao Bo Co Do 1 Each output pin is Hi-Z in sleep mode. TEST (Pin 1): Sony test pin (Use it with left open or grounded.) Note) Short-circuit GND1 and GND2 on the flexible printed circuit board. Arithmetic formulas RF+ = (A + B + C + D)/2 RF- = -(A + B + C + D)/2 4 TEST CXA2958EN Pin Description Pin Symbol I/O Equivalent circuit Description No. VCC 1 TEST Sony test pin. 1 I (Leave open or connect to GND.) GND VCC 2 VC 2 I Reference voltage input. GND VCC 300 kΩ 3 SW1 17 SW2 18 SW3 I 3 17 18 Mode switching input. 0 V to 0.4 V : Low 1 kΩ 1.3 V to 2.0 V : Middle 50 kΩ 2.5 V to VCC : High GND VCC 5 E 4 F O 16 G 15 H 5 4 16 15 Output of voltage signals converted from optical signals. GND 5 CXA2958EN Pin Symbol I/O Equivalent circuit Description No. VCC 6 A 12 B O 11 C 7 D 6 12 11 7 Output of voltage signals converted from optical signals. GND VCC 8 GND1 9 GND2 10 VCC I Ground. 8 9 — I Positive power supply. VCC 13 RF+ O Non-inverted output of added A to D signals. 13 GND VCC 14 RF– O 14 Inverted output of added A to D signals. GND 6 CXA2958EN Electrical and Optical Characteristics (Vcc = 5.0 V, Vc = 2.2 V, Ta = 25 ˚C) 1. Current Consumption Item Symbol Current consumption Icc Current consumption Sleep Iccs Current consumption Vc Ivc1 Current consumption Vc Ivc2 Conditions Output Gain In the dark ― ― For output Min. Typ. Max. ― 28 35 ― 0.32 0.56 ― 0.1 ― ― -1.4 ― Unit mA voltage of 1 V 2. Output Offset Voltage Item Output offset voltage Symbol Voff Conditions Output Gain Min. Typ. Max. High - 35 ― 35 A to D Middle - 35 ― 35 In the dark, Low - 35 ― 35 Vc reference High - 45 ― 45 Middle - 40 ― 40 Low - 40 ― 40 1.45 1.6 1.75 V 2.65 2.9 3.15 V High - 70 ― 70 Middle - 70 ― 70 Low - 70 ― 70 High -70 ― 70 Middle - 70 ― 70 Low - 70 ― 70 High - 100 ― 100 E to H RFP reference voltage RFN reference voltage VRFP VRFN In the dark, RF+ GND reference Low In the dark, RF- GND reference Middle Low A+B +C + D voltage difference Middle High (A + C) - (B + D) ΔVoff mV High (A + D) - (B + C) Output offset Unit Middle - 100 ― 100 In the dark, Low - 100 ― 100 Vc reference High - 90 ― 90 Middle - 80 ― 80 Low - 80 ― 80 (E + H) - (F + G) (E + G) - (F + H) E+F +G + H 7 High - 90 ― 90 Middle - 80 ― 80 Low - 80 ― 80 High - 90 ― 90 Middle - 80 ― 80 Low - 80 ― 80 mV CXA2958EN 3. Output Offset Temperature Drift Item Symbol Conditions Output A to D Output offset temperature drift* ΔVoff/T In the dark Vc reference 0 °C to 80 °C E to H RF+ RF- Gain High Middle Low High Middle Low High Middle Low Min. Typ. Max. -100 ― 100 Unit µV/°C -200 ― 200 -1.5 ― 1.5 mV/°C Gain Min. Typ. Max. Unit High 52.4 69.9 87.4 Middle 26.3 35.0 43.8 4. Output Sensitivity Item Symbol Conditions Po Output 5 μW 5 μW λ = 405 nm A to D 15 μW Low 9.2 12.3 15.4 2 μW High 296.1 394.8 493.5 Middle 148.4 197.9 247.4 15 μW Low 52.1 69.4 86.8 5 μW High 26.3 35.0 43.8 Middle 13.1 17.5 21.9 Low 4.61 6.15 7.69 High 68.8 91.7 114.6 5 μW 5 μW 15 μW E to H RF+ RF- 5 μW 5 μW Output sensitivity* DCS λ = 650 nm Middle 34.4 45.9 57.4 15 μW Low 12.1 16.1 20.1 mV 2 μW High 388.7 518.3 647.9 /µW Middle 194.6 259.5 324.4 Low 68.4 91.2 114.0 5 μW A to D E to H 15 μW 5 μW 5 μW 15 μW 3 μW 5 μW λ = 780 nm 2 μW 5 μW 3 μW 5 μW Vomax DC Output saturation RF+ RFA to D E to H High 34.4 45.9 57.4 Middle 17.3 23.0 28.8 Low 6.08 8.10 10.13 High 97.4 129.9 162.4 Middle 34.2 45.6 57.0 High 550.4 733.9 917.4 Middle 193.2 257.6 322.0 RF+ High 48.8 65.0 81.3 17.1 22.8 28.5 3.6 3.8 ― RF- Middle A to D High E to H Middle RF+ Low voltage V High Vomin DC RF- Middle Low 8 ― 1.2 1.4 CXA2958EN 5. AC Characteristics Item Symbol Conditions Output Gain Min. Typ. Max. High 90 120 ― Middle 132 160 ― Low 132 160 ― High 1 4 ― Middle 1 4 ― Low 1 4 ― High 90 120 ― Middle 132 160 ― Low 132 160 ― High 40 70 ― Middle 40 70 ― High 1 4 ― Middle 1 4 ― RF+ High 40 70 ― RF- Middle 40 70 ― ― 0.5 1.5 ― 0.5 1.5 ― 0.5 1.5 ― 0.5 1.5 ― 0.5 1.5 ― 0.5 1.5 ― 0.5 1.5 ― 0.5 1.5 ― 0.5 1.5 ― 0.5 1.5 A to D λ = 405 nm, 650 nm 100 kHz ref. -3 dB E to H BD/DVD mode Frequency RF+ fc response* RF- A to D λ = 780 nm 100 kHz ref. -3 dB E to H CD mode λ = 405 nm, 650 nm A to D 1 MHz to 66 MHz (RF+) BD/DVD mode - (RF-) (RF+) MHz High A to D λ = 405 nm, 650 nm Unit Middle - (RF-) 1 MHz to 99 MHz Group delay A to D BD/DVD mode ΔGd (RF+) difference* Low ns - (RF-) A to D (RF+) λ = 780 nm High - (RF-) 1 MHz to 30 MHz A to D CD mode (RF+) - (RF-) 9 Middle CXA2958EN 6. Output Noise Level Item Symbol Conditions Output 1 MHz to 66 MHz, RBW = 30 kHz, in the dark BD/DVD mode A to D RF+, RF- Gain RF+, RF- Output noise level* RF+, RF- RF+, RF- -74 -69 ― -73 -68 ― -76.5 -73 ― -75.5 -72 ― -85.5 -82 ― -84 -81 ― -73 -68 ― -72 -67 ― -80 -75 ― -79 -74 Unit dBm High A to D RF+, RF- ― Low A to D 1 MHz to 30 MHz, RBW = 30 kHz, in the dark CD mode Max. Middle A to D Vn Typ. High A to D 1 MHz to 99 MHz, RBW = 30 kHz, in the dark BD/DVD mode Min. Middle 7. Supply Voltage Rejection Ratio Item Supply voltage rejection ratio* Symbol PSRR Conditions In the dark, Ripple voltage 100 mV 10 kHz to 200 kHz Output Gain Min. Typ. Max. Unit (RF+) - (RF-) High ― 30 ― dB Conditions Output Gain Min. Typ. Max. Unit ― 55 ― ― 200 ― ― 55 ― 8. Output Impedance Item Symbol A to D Output impedance* Zo In the dark E to H RF+ RF- High Middle Low Ω Notes on Measurement (for all modes) 1. Vc is the reference for output offset voltage of A to D and E to H. 2. Output voltage: Vc is the reference for A to D and E to H. 1.6 V is the reference for RF+. 2.9 V is the reference for RF–. Then, the offset voltage is excluded. 3. GND is the reference for the maximum output potential and minimum output potential. 4. Items with an asterisk (*) are design guaranteed items. 5. Measurement by optical input: Measurement is made by emitting light to the center of each photodiode. 6. Load conditions (for Vc) are as follows.): A to D: 2.5 kΩ//5 pF, E to H: 10 kΩ//5 pF, RF±: 0.1 μF + (2.5 kΩ//5 pF) 10 CXA2958EN Measurement Circuit 2.2 V 1 TEST SW3 18 2 Vc SW2 17 3 SW1 G 16 4 F H 15 5 E RF- 14 6 A RF+ 13 7 D B 12 8 GND1 C 11 9 GND2 VCC 10 0.1 µF 5.0 V 0.1 µF The load conditions (for Vc) ： A to D：2.5 kΩ//5 pF, E to H：10 kΩ//5 pF RF±：0.1 μF + (2.5 kΩ//5 pF) 11 CXA2958EN Photodetector Dimensions Unit (μm) Top View CD BD / DVD 10 10 90 105 147.2 27 105 f b l i 90 k j 147.2 c D A C B G H 105 10 13.6 a 90 d 90 27 105 15.2 15.2 90 □110 122.7 122.7 g 90 E F h e 10 Photodetector center 162.6 AL shaded area Pin Configuration Top View (Viewed from the photodetector side) TEST 1 18 SW3 Vc 2 17 SW2 SW1 3 16 G 15 H 14 RF- AB DC GH 4 EF E 5 e f a b i j h g dc l k A 6 13 RF+ D 7 12 B GND1 8 11 C GND2 9 10 Vcc F TEST: Sony test pin (Leave open or connect to GND.) 12 CXA2958EN Photodetector Position Y ±0.15 mm Height of receiving surface Receiving surface ±0.15 mm 1.2±0.15 X Organic substrate Bottom of the package ±0.2mm Resin Chip Side View Top View Position accuracy： X，Y ±0.15 mm θ ±2° PKG Top View Product mark ±0.2mm 1pin INDEX 13 Concavities for removing the protective tape×4 CXA2958EN Example of Representative Characteristics Frequency response (X: 1 MHz to 1 GHz log, Y: 3 dB/div) ・BD High Gain Mode ・BD Middle Gain Mode A to D 3.0 0.0 0.0 -3.0 -3.0 -6.0 -6.0 Gain[dB] Gain[dB] A to D 3.0 -9.0 -9.0 -12.0 -12.0 -15.0 -15.0 -18.0 -18.0 1M 10 M 100 M 1M 1G 10 M 3.0 3.0 0.0 0.0 -3.0 -3.0 -6.0 -6.0 Gain[dB] Gain[dB] 1G 100 M 1G 100 M 1G E to H E to H -9.0 -9.0 -12.0 -12.0 -15.0 -15.0 -18.0 -18.0 1M 10 M 100 M 1M 1G 10 M Frequency[Hz] Frequency[Hz] (RF+) - (RF-) 3.0 3.0 0.0 0.0 -3.0 -3.0 -6.0 -6.0 Gain[dB] Gain[dB] 100 M Frequency[Hz] Frequency[Hz] -9.0 -9.0 -12.0 -12.0 -15.0 -15.0 -18.0 1M 10 M 100 M (RF+) - (RF-) -18.0 1G 1M Frequency[Hz] 10 M Frequency[Hz] 14 CXA2958EN Frequency response (X: 1 MHz to 1 GHz log, Y: 3 dB/div) ・BD Low Gain Mode A to D 3.0 0.0 -3.0 Gain[dB] -6.0 -9.0 -12.0 -15.0 -18.0 1M 10 M 100 M 1G 100 M 1G 100 M 1G Frequency[Hz] E to H 3.0 0.0 -3.0 Gain[dB] -6.0 -9.0 -12.0 -15.0 -18.0 1M 10 M Frequency[Hz] (RF+) - (RF-) 3.0 0.0 Gain[dB] -3.0 -6.0 -9.0 -12.0 -15.0 -18.0 1M 10 M Frequency[Hz] 15 CXA2958EN Frequency response (X: 1 MHz to 1 GHz log, Y: 3 dB/div) ・DVD High Gain Mode ・DVD Middle Gain Mode A to D 3.0 0.0 0.0 -3.0 -3.0 -6.0 -6.0 Gain[dB] Gain[dB] A to D 3.0 -9.0 -9.0 -12.0 -12.0 -15.0 -15.0 -18.0 -18.0 1M 10 M 100 M 1M 1G 10 M 100 M 1G 100 M 1G E to H E to H 3.0 3.0 0.0 0.0 -3.0 -3.0 -6.0 -6.0 Gain[dB] Gain[dB] 1G Frequency[Hz] Frequency[Hz] -9.0 -9.0 -12.0 -12.0 -15.0 -15.0 -18.0 -18.0 1M 10 M 100 M 1M 1G 10 M Frequency[Hz] Frequency[Hz] (RF+) - (RF-) 3.0 3.0 0.0 0.0 -3.0 -3.0 -6.0 -6.0 Gain[dB] Gain[dB] 100 M -9.0 -9.0 -12.0 -12.0 -15.0 -15.0 -18.0 1M 10 M 100 M (RF+) - (RF-) -18.0 1G 1M Frequency[Hz] 10 M Frequency[Hz] 16 CXA2958EN Frequency response (X: 1 MHz to 1 GHz log, Y: 3 dB/div) ・DVD Low Gain Mode A to D 3.0 0.0 -3.0 Gain[dB] -6.0 -9.0 -12.0 -15.0 -18.0 1M 10 M 100 M 1G 100 M 1G 100 M 1G Frequency[Hz] E to H 3.0 0.0 -3.0 Gain[dB] -6.0 -9.0 -12.0 -15.0 -18.0 1M 10 M Frequency[Hz] (RF+) - (RF-) 3.0 0.0 Gain[dB] -3.0 -6.0 -9.0 -12.0 -15.0 -18.0 1M 10 M Frequency[Hz] 17 CXA2958EN Frequency response (X: 1 MHz to 1 GHz log, Y: 3 dB/div) ・CD High Gain Mode ・CD Middle Gain Mode A to D 3.0 0.0 0.0 -3.0 -3.0 -6.0 -6.0 Gain[dB] Gain[dB] A to D 3.0 -9.0 -9.0 -12.0 -12.0 -15.0 -15.0 -18.0 -18.0 1M 10 M 100 M 1M 1G 10 M Frequency[Hz] E to H 0.0 0.0 -3.0 -3.0 -6.0 -6.0 -9.0 100 M 1G -9.0 -12.0 -12.0 -15.0 -15.0 -18.0 -18.0 1M 10 M 100 M 1M 1G 10 M Frequency[Hz] Frequency[Hz] (RF+) - (RF-) 3.0 (RF+) - (RF-) 3.0 0.0 0.0 -3.0 -3.0 -6.0 -6.0 Gain[dB] Gain[dB] 1G E to H 3.0 Gain[dB] Gain[dB] 3.0 100 M Frequency[Hz] -9.0 -9.0 -12.0 -12.0 -15.0 -15.0 -18.0 -18.0 1M 10 M 100 M 1M 1G 10 M 100 M Frequency[Hz] Frequency[Hz] 18 1G CXA2958EN Notes on Handling 1. Mechanical strength of package The mechanical strength of the package is not guaranteed for the CXA2958EN. Do not employ a mounting method which applies a heavy load to the package such as supporting a board with the package. 2. Visual inspection standards The visual inspection standards over the photodetector are as follows. (1) Foreign object limit : Equivalent area 10 μmϕ or less (2) Inspection method : Focus on the photodetector and measure the size of the foreign object. (3) Inspection range : Entire photodetector area (on page 12) 3. Bypass capacitors Connect 0.1 μF capacitors between the Vcc and GND pins and between the Vc and GND pins to lower the power supply line impedance. Use a flexible printed circuit (FPC) pattern or take other measures so that the bypass capacitors can be located near (3 mm or less) the PDIC. 4. Soldering It has been confirmed that the following conditions are satisfied for the reflow soldering. R390 and IPC/JEDEC J-STD-020D MSL 3 Floor Life 30 ˚C 60 % RH 168 hours <Reflow soldering recommended conditions in actual use> (1) Perform infrared or hot air reflow, or use an oven that combines these methods. (2) Perform reflow soldering a maximum of three times. (3) Finish reflow soldering within the conditions of 30 ˚C and 60 % RH in 168 hours after unsealing the moisture-proof packing. (4) Mount this IC at the reflow peak temperature of 255 ˚C or less according to the reflow profile of IPC/JEDEC J-STD-020D. (5) Unless reflow soldering can be performed within the specifications above, bake the IC before reflow soldering. [Baking conditions] ・125 ˚C, 10 to 48 h ・Transfer to a heat proof tray or a heat proof vessel for baking. ・Perform baking only one time. (6) Finish reflow soldering within the specifications above after baking. 5. Others (1) If outgas is emitted from the materials used such as an uncured portion of the adhesive, foreign objects may deposit on the photodetector by laser irradiation. Cure the adhesive thoroughly and check it thoroughly by laser aging, etc. (2) This package has a bare-chip structure. Avoid using materials that emit strong corrosive outgas. 19 CXA2958EN Package Outline (Unit: mm) 20 CXA2958EN Marking 2958 21 CXA2958EN Note Sony reserves the right to change products and specifications noted in this data sheet without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits. 22