1/4 STRUCTURE Silicon Monolithic Integrated Circuit TYPE BD9251FV PRODUCT Preamp IC for Pyroelectricity Infrared Sensor FEATURES 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 VDD Power Dissipation Pd Operating Temperature Topr Limits Units -0.3～7.0 V 440 mW ※1 -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 Symbol Min. Typ. Supply Voltage VDD 2.97 5.0 6.0 V A1P_IN Offset Voltage VA1P_IN_OFFSET - 1.5 - V Max. Units This product don't design for protection radioactive rays. REV. A Remarks VDRAIN=2.3V 2/4 ●Electric Characteristics （VDD=5.0V, Ta=25℃） Parameter Symbol Spec Units Conditions Min. Typ. Max. IDD - 300 400 uA Output no load ＶDRAIN 2.0 2.3 - Ｖ VDD≧2.97V, IDRAIN≦100µA AMP1/AMP2 Input Voltage VIN 0.1 - VDD-0.8 V AMP1/AMP2 Gain AG - - 46 dB AMP1/AMP2 Unity Gain AUG - 1 - MHz VA1OFF - - 10 mV VA2OUT - 1.5 - V IA2OUT1 20 30 - µA IA2OUT2 20 200 - µA VOH VDD-0.6 - VDD V IOH=-1mA VOL 0 - 0.6 V IOL=+1mA Supply Current DRAIN Output Voltage 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 ●Package Outline Fig.1 SSOP-B14 Package (Unit:mm) D9251 Lot No. REV. A 3/4 ●PIN Description PIN No. PIN Name 1 GND 2 NC 3 DRAIN Function Remarks Ground NC Power supply for pyroelectric infrared sensor 4 A1P_IN Sensor input 5 A1N_IN Amp1 n-input 6 A1_OUT Amp1 output 7 A2P_DI Amp2 diode output 8 A2N_IN Amp2 n-input 9 A2_OUT Amp2 output, Analog output 10 REF_OUT Reference voltage (1/2VDD) output 11 COMP_IN Comparator input 12 D_OUT Comparator output 13 T_OUT Moving detection output 14 VDD Power supply ●Block Diagram/Application C1 VDD Preamp ＩＣ DRAIN Voltage Regulator C2 D A1P_IN + - C3 AMP2 - 47kΩ 7.5kΩ 33kΩ 10kΩ G + 650kΩ AMP1 7.5kΩ S 33kΩ 350kΩ Pyroelectric sensor A1N_IN A1_OUT A2P_DI A2N_IN A2_OUT REF_OUT + D_OUT Ｓ + COMP_IN T_OUT Ｒ GND R5 R2 C4 R1 C5 R4 C6 R3 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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