BD9251FV

1/4 STRUCTURE TYPE PRODUCT FEATURES Silicon Monolithic Integrated Circuit BD9251FV Preamp IC for Pyroelectricity Infrared Sensor 1）Amplifier for sensor output 2）Comparator for sensor output 3）Built-in voltage regulator 4）Built-in moving detector ●Absolute Maximum Ratings (Ta=25℃) Parameter Symbol Supply Voltage Power Dissipation Operating Temperature VDD Pd Topr Limits -0.3～7.0 440 ※1 Units V mW ℃ -30～75 -55～125 ℃ Storage Temperature Tstg ※1. It reduces 3.5mW/℃ then Ta≧25℃. (On glass epoxy board of 70mm×70mm×1.6mm) ●Operating Conditions Parameter Supply Voltage A1P_IN Offset Voltage Symbol VDD VA1P_IN_OFFSET Min. 2.97 - Typ. 5.0 1.5 Max. Units 6.0 V V Remarks VDRAIN=2.3V This product don't design for protection radioactive rays. REV. A 2/4 ●Electric Characteristics （VDD=5.0V, Ta=25℃） Parameter Supply Current DRAIN Output Voltage AMP1/AMP2 Input Voltage AMP1/AMP2 Gain AMP1/AMP2 Unity Gain AMP1 Input Offset Voltage AMP2 Output Offset Voltage A2_OUT Output Current (source) A2_OUT Output Current (sink) D_OUT / T_OUT Output "H" Voltage D_OUT / T_OUT Output "L" Voltage Symbol IDD ＶDRAIN VIN AG AUG VA1OFF VA2OUT IA2OUT1 IA2OUT2 VOH Spec Min. 2.0 0.1 20 20 VDD-0.6 0 Typ. 300 2.3 1 1.5 30 200 Max. 400 VDD-0.8 46 10 VDD 0.6 Units uA Ｖ V dB MHz mV V µA µA V V IOH=-1mA IOL=+1mA Conditions Output no load VDD≧2.97V, IDRAIN≦100µA VOL ●Package Outline Fig.1 SSOP-B14 Package (Unit:mm) D9251 Lot No. REV. A 3/4 ●PIN Description PIN No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 PIN Name GND NC DRAIN A1P_IN A1N_IN A1_OUT A2P_DI A2N_IN A2_OUT REF_OUT COMP_IN D_OUT T_OUT VDD Ground NC Function Remarks Power supply for pyroelectric infrared sensor Sensor input Amp1 n-input Amp1 output Amp2 diode output Amp2 n-input Amp2 output, Analog output Reference voltage (1/2VDD) output Comparator input Comparator output Moving detection output Power supply ●Block Diagram/Application VDD DRAIN Voltage Regulator C2 C1 Preamp ＩＣ Pyroelectric sensor D A1P_IN S C3 10kΩ G 47kΩ A1N_IN A1_OUT A2P_DI + AMP1 350kΩ 650kΩ 33kΩ + 7.5kΩ AMP2 + D_OUT - - Ｓ T_OUT 7.5kΩ 33kΩ + Ｒ A2N_IN A2_OUT REF_OUT R5 COMP_IN GND R2 C4 R1 C5 C6 R3 R4 C7 C8 Please decide the constant after it confirms it enough examining the characteristic and the condition of the pyroelectric sensor. REV. A 4/4 ●Cautions on use. (1) Absolute maximum ratings Use of the IC in excess of absolute maximum ratings such as the applied voltage or operating temperature range may result in IC damage. Assumptions should not be made regarding the state of the IC (short mode or open mode) when such damage is suffered. A physical safety measure such as a fuse should be implemented when use of the IC in aspecial mode where the absolute maximum ratings may be exceeded is anticipated. (2) GND potential Ensure a minimum GND pin potential in all operating conditions. (3) Short circuit mode between terminals and wrong mounting In order to mount the IC on a set PCB, pay thorough attention to the direction and offset of the ICs. Erroneous mounting can destroy the IC. Furthermore, if a short circuit occurs due to foreign matters entering between terminals or between the terminal and the power supply or the GND terminal, the IC can destroy. (4) Actions in strong magnetic field Use caution when using the IC in the presence of a strong magnetic field as doing so may cause the IC to malfunction. (5) Mutual impedance Use short and wide wiring tracks for the power supply and ground to keep the mutual impedance as small as possible .Use a capacitor to keep ripple to a minimum. (6) About warm-up time Operation depends on a power-supply voltage and an external constant for time until stabilizing. Please confirm warm-up time enough when you use it. REV. A Notice Notes No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd. The content specified herein is subject to change for improvement without notice. The content specified herein is for the purpose of introducing ROHM's products (hereinafter "Products"). If you wish to use any such Product, please be sure to refer to the specifications, which can be obtained from ROHM upon request. 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