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| CXA1685M High-Speed Transimpedance Amplifier Description CXA1685M is a low noise transimpedance amplifier, particularly suitable for fiber-optic system. CXA1685M is fabricated using high-speed bipolar process. Features * High transimpedance: 8 pin SOP (Plastic) Q 11.2k (Typ.) Q 10.8k (Typ.) * Wide band width (-3dB): Q 177MHz (Typ.) Q 157MHz (Typ.) * Maximum input current: 1mA * Low noise: 1.7pA/ Hz (Typ.) Applications * SONET/SDH: 155Mb/s * Fiber channel: 133Mb/s * FDDI: 125Mb/s Absolute Maximum Ratings * Supply voltage VCC - VEE -0.3 to +7.0 V * Minimum input voltage VIN VEE V * Input current IIN -1 to +1 mA * Output current (Q/Q) (Continuous) IO 0 to 50 mA (Surge) 0 to 100 mA * Storage temperature Tstg -65 to +150 C Recommended Operating Conditions * DC power supply voltage VCC - VEE 4.75 to 5.46 V * Operating ambient temperature Ta 0 to +85 C Structure Bipolar silicon monolithic IC Sony reserves the right to change products and specifications 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. -1- E94X22A8Y CXA1685M Block Diagram and Pin Assignment VCC 5 ZT 4 VCCA IN 6 3Q C7 2Q VEES 8 1 VEEDA Electrical Characteristics * DC Electrical Characteristics Item Supply current Transimpedance Q Q (VCC = VCCA = GND, VEES = VEEDA = -5.46 to -4.75V, Ta = 0 to +85C) Symbol IEE ZTQ ZTQ Ta = 25C Test Condition input pin left open Min. -15.3 6.6 6.2 +40 +1000 VEE + 2.5 input pin left open VEE + 1.7 VCC - 2.4 VEE + 1.7 1.3 pF V Typ. -10.0 11.2 10.8 14.8 14.3 A Max. Unit mA k Max. Input Current before clipping IIN Max. Input Current IN Bias votlage Q Q C Input capacitance IIN2 VIN VQ VQ VC CIN * AC Electrical Characteristics Item Bandwidth (-3dB) Q Q (VCC = VCCA = GND, VEES = VEEDA = -5.46 to -4.75V, Ta = 0 to +85C) Symbol f-3dBQ f-3dBQ In fN = 1kHZ to 156MHZ 1 Test Condition Min. 113 109 Typ. 177 157 1.7 pA/ HZ Max. Unit. MHZ Input Current Noise Spectral Density (Mean value) 1 Assumes photodiode capacitance; CPD < 1.0pF, output load capacitance; Cout = 2.0pF, output load resistor; Q: 620 to VEE, Q: 1.3k to VEE -2- CXA1685M Application Circuit VCC PD 0.1F VCC 5 ZT 4 VCCA 0.1F IN 6 3 Q Q C 1.0F 7 2 Q Q VEES 8 1 VEEDA 620 1.3k VEE Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same. Cautions for Handling 1. As the electronic breakdown level is weak, take care to handle. 2. The internal resistor of the output pin does not have the capability of drive (RL = 10k). The terminal resistors must be connected. The resistance value is shown in application circuit. -3- CXA1685M Typical Performance Typical frequency characteristics (VCC - VEE = 5.0V, Ta = 25C) Q Output 5dB/div f-3dB = 177MHz Q Output 5dB/div f-3dB = 157MHz 0 500M 1.0G 0 500M 1.0G Typical Output Wave forms (VCC - VEE = 5.0V, Ta = 25C) 20mV/div VIN = -36dBm, fIN = 80MHz Q Q 65.9000ns 90.9000ns 115.900ns Duty Cycle Distortion vs Input Current Q Output 55 fIN = 155Mbps 55 Q Output fIN = 155Mbps 50 50 Q Output DCD [%] 45 Q Output DCD [%] 0 200 400 600 IIN [A] 800 1000 45 40 40 35 35 30 30 0 200 400 600 IIN [A] 800 1000 -4- CXA1685M f-3dBQ vs VEE 200 190 180 170 160 150 140 -5.6 Ta = -40C Ta = 25C Ta = 85C -5.4 -5.2 VEE [V] -5.0 -4.8 -4.6 200 190 180 170 160 150 140 -50 f-3dBQ vs Ta f-3dB [MHz] f-3dB [MHz] VCC - VEE = 4.7V VCC - VEE = 5.0V VCC - VEE = 5.5V -25 0 25 Ta [C] 50 75 100 f-3dBQ vs VCC-VEE 200 190 180 170 160 150 140 -5.6 f-3dBQ vs Ta 200 Ta = -40C Ta = 25C Ta = 85C 190 180 170 160 150 140 -50 VCC - VEE = 4.7V VCC - VEE = 5.0V VCC - VEE = 5.5V (c) f-3dB [MHz] f-3dB [MHz] -5.4 -5.2 VEE [V] -5.0 -4.8 -4.6 -25 0 25 Ta [C] 50 75 100 VQ vs IIN -1 -1.5 -2 Ta = 85C Ta = 25C Ta = -40C -1 -1.5 -2 VQ vs IIN VQ [V] -3 -3.5 -4 -4.5 0 50 100 IIN [A] 150 200 VQ [V] -2.5 -2.5 -3 -3.5 -4 -4.5 0 50 100 IIN [A] 150 200 Ta = 85C Ta = 27C Ta = -40C -5- CXA1685M IEE vs VEE -8.8 -9 -9.2 Ta = 25C -8.8 -9 -9.2 IEE vs Ta VEE = -5.0V IEE [mA] IEE [mA] -9.4 -9.6 -9.8 -10 -10.2 -5.6 -9.4 -9.6 -9.8 -10 -10.2 -50 -5.4 -5.2 VEE [V] -5 -4.8 -4.6 -25 0 25 Ta [C] 50 75 100 VQ vs VEE -3 Ta = 25C -3 VQ vs Ta VEE = -5.0V -3.2 -3.2 VQ [V] VQ [V] -3.4 -3.4 -3.6 -3.6 -3.8 -3.8 -4 -5.6 -5.4 -5.2 VEE [V] -5 -4.8 -4.6 -4 -50 -25 0 25 Ta [C] 50 75 100 VQ vs VEE -1.8 -2 -2.2 Ta = 25C -1.8 -2 -2.2 VQ vs Ta VEE = -5.0V VQ [V] VQ [V] -5.4 -5.2 VEE [V] -5 -4.8 -4.6 -2.4 -2.6 -2.8 -3 -5.6 -2.4 -2.6 -2.8 -3 -50 -25 0 25 Ta [C] 50 75 100 -6- CXA1685M Test Circuit (Ta = 25C, VEE = -5.0V) Spectrum Analyzer/ Oscilloscope VEE VEE 620 Signal Generator ATT -40dB 1 2p 0.1 100 0.1 51 2p 680p VEE VEE VEE Tracking Generator VEE 1.3k 2p 50 51 51 50 -7- CXA1685M Package Outline Unit: mm 8PIN SOP (PLASTIC) + 0.4 1.25 - 0.15 + 0.4 5.0 - 0.1 8 5 A 0.10 + 0.3 4.4 - 0.1 1 4 1.27 b 0.24 M 0 to 10 (0.15) + 0.1 0.15 - 0.05 b = 0.4 0.03 + 0.03 0.15 - 0.01 + 0.1 b = 0.4 - 0.05 (0.4) DETAILA DETAIL B : SOLDER DETAIL B : PALLADIUM PACKAGE STRUCTURE PACKAGE MATERIAL SONY CODE EIAJ CODE JEDEC CODE SOP-8P-L03 SOP008-P-0225 LEAD TREATMENT LEAD MATERIAL PACKAGE MASS EPOXY RESIN SOLDER/PALLADIUM PLATING 42/COPPER ALLOY 0.1g NOTE : PALLADIUM PLATING This product uses S-PdPPF (Sony Spec.-Palladium Pre-Plated Lead Frame). -8- 0.5 0.2 B 6.4 0.4 + 0.15 0.1 - 0.1 |
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