Amplifier for Pyroelectric Infrared Sensor - Rohm

1 1/8 - 2011 ROHM Co., Ltd. All rights reserved. IC for Human Body Detector Amplifier for Pyroelectric Infrared Sensor BD9251FV Description BD9251FV is used for the human body detection application. Make to single-chip, easy to use then before. Power-saving in the best design. Reduce the standby power requirement of the device used always. Don t choose the mounting place by a space-saving. Features 1) Amplifier for Sensor output 2) Comparator for Sensor output 3) Built-in voltage regulator 4) Built-in moving detector Applications Lighting, Sensor Light, Security system, WEB camera, TV, PC display, Air Conditioner, Ventilation fan Absolute Maximum Ratings (Ta=25 C)

2 Parameter Symbol Ratings UnitsSupply Voltage VDD V Power Dissipation Pd 440 1 mW Operating Temperature Topr -30 75 C Storage Temperature Tstg -55 125 C 1. It reduces C then Ta 25 C. (On glass epoxy board of 70mm 70mm ) Operating Conditions Parameter Symbol Ratings UnitsConditions Min. Typ.

3 Voltage VDD V A1P_IN Offset Voltage VA1P_IN_OFFSET- - V VDRAIN= This product doesn t design for protection radioactive rays. Note 2/8 BD9251FV - 2011 ROHM Co., Ltd. All rights reserved. Electric Characteristics (VDD= , Ta=25 C) Parameter Symbol Limits UnitsConditions Min. Typ. Current IDD - 300 400 uA Output no load DRAIN Output Voltage VDRAIN - V VDD.

4 IDRAIN 100 A AMP1/AMP2 Input Voltage VIN - AMP1/AMP2 Gain AG - - 46 dB AMP1/AMP2 Unity Gain AUG - 1 - MHz AMP1 Input Offset Voltage VA1 OFF - - 10 mV AMP2 Output Offset Voltage VA2 OUT - - V A2_OUT Output Current (source) IA2 OUT1 20 30 - A A2_OUT Output Current (sink) IA2 OUT2 20 200 - A D_OUT / T_OUT Output "H" Voltage VOH VDD V IOH=-1mA D_OUT / T_OUT Output "L" Voltage VOL 0 - V IOL=+1mA Technical Note 3/8 BD9251FV - 2011 ROHM Co.

5 , Ltd. All rights reserved. Electrical characteristic curves (Reference data) amp1/amp2 closed-loop-gain VDD= amp1/amp2 closed-loop-gain VDD=5V amp1/amp2 closed-loop-gain VDD=6V 0123- 50050100Ta [ C]DRAIN[V] Drain Voltage (source 100uA) Drain Voltage (Ta=25 C) 0123234567 VDD[V]DRAIN [V]-30 C25 C75 C05010015020025030035040023 456 78 VDD[V]IDD [uA]-30 C25 C75 + 01 + 02 + 03 + 04 + 05 + 06 + 07fr eq uency [H z]gain [dB]-30 C25 C75 +01 +02 +03 +04 +05 +06 +07fr eq uency [H z]gai n [dB]-30 C25 C75 +01 +02 +03 +04 +05 +06 +07fr eq uency [H z]gai n [dB]-30 C25 C75 C050100150200250300350400-50050100Ta[ C]IDD [uA] [uA]DRAIN[V] + 01 + 02 + 03 + 04 + 05 + 06fr eq uency [H z]RIPPLE REJECTION [dB] Drain Voltage PSRR (Ta=25 C)

6 VDD= + 01 + 02 + 03 + 04 + 05 + 06fr eq uency [H z]RIPPLE REJECTION [dB] Drain Voltage PSRR (Ta=25 C) VDD= + 01 + 02 + 03 + 04 + 05 + 06fr eq uency [H z]RIPPLE REJECTION [dB] Drain Voltage PSRR (Ta=25 C) VDD= 2 l oad [uF]war m _up_ti m e [us] l DRAIN VOLTAGE warm_up_time (Ta=25 C) IDD IDD Drain Voltage (source 100uA) Technical Note 4/8 BD9251FV - 2011 ROHM Co., Ltd. All rights reserved. D_OUT Output Low Voltage (sink 1mA) D_OUT Output High Voltage (source 1mA) Electrical characteristic curves (Reference data) Continued 01234567234 567 VDD [V]D_OUT [V]-30 C25 C75 C01234567234567 VDD [V]T_OUT [V]-30 C25 C75 T_OUT Output Low Voltage (sink 1mA) T_OUT Output High Voltage (source 1mA) AMP2 Output High Voltage (source 20uA) 01234567- 50050100Ta [ C]A2_OU T [V] AMP2 Output High Voltage (source 20uA) AMP2 Output Low Voltage (sink 20uA)

7 AMP2 Output Low Voltage (source 20uA) 01234567234567 VDD [V]A2_OU T [V]-30 C25 C75 C01234567- 50050100Ta [ C]A2_OU T [V] 45 67 VDD [V]D_OUT [V]-30 C25 C75 C01234567234 567 VDD [V]T_OUT [V]-30 C25 C75 C01234567234567 VDD [V]A2_OU T [V]-30 C25 C75 CTechnical Note 5/8 BD9251FV - 2011 ROHM Co., Ltd. All rights reserved. Block Diagram/Application DSGC247k A1P_INDRAINVDDD_OUGNDA2_OUTA1N_INA2N_INA 1_OUT650k VoltageRegulatorPyroelectricsensorT_OUR1 C4R2C5C6R3C7C3+-350k +-A2P_DI-+ -+ 33k 33k REF_OUT COMP_INC1R5BD9251FV10k AMP1 AMP2 Please decide the constant after it confirms it enough examing the characteristic and the conditionof the Pyroelectric Sensor .

8 Example of circuit constant C1=C2=C3 : 1uF R1=R3 : 47k C4=C6 : R2=R4 : C5=C7 : 15nF R5 : 220k C8 : 10uF PIN Description PIN No. PIN Name Function Remarks 1 GND Ground 2 NC NC 3 DRAIN Power supply for Pyroelectric Infrared Sensor 4 A1P_IN Sensor input 5 A1N_IN Amp1 n-input 6 A1_OUT Amp1 output

9 7 A2P_DI Amp2 diode output 8 A2N_IN Amp2 n-input 9 A2_OUT Amp2 output, Analog output 10 REF_OUT Reference voltage (1/2 VDD) output 11 COMP_IN Comparator input 12 D_OUT Comparator output 13 T_OUT Moving detection output 14 VDD Power supply DSGC247k A1P_INDRAINVDDD_OUTGNDA2_OUTA1N_INA2N_IN A1_OUT650k VoltageRegulato

10 RPyroelectricsensorT_OUTR1C4R2C5C6R3C7C3 +-350k +-A2P_DI-+ -+ 33k 33k REF_OUTCOMP_INC1R5BD9251FV10k AMP1 AMP2 Please decide the constant after it confirms it enough examing the characteristic and the conditionof the Pyroelectric Note 6/8 BD9251FV - 2011 ROHM Co., Ltd. All rights reserved. Timing chart ( When using dual type pyro Sensor ) LeftRight LeftRight Time axis Time axisA1P_INA1P_IN(Pyro Sensor output) Pyro Sensor output)A2_OUT A2_OUT(Analog output) (Analog output)VREF_H sideVREF_H sideComparator output Comparator outputVREF_L side VREF_L sideComparator output Comparator outputD_OUT D_OUTT_OUT T_OUTVREF_HVREF_LPyro Sensor VREF_HVREF_LPyro Sensor LH HLSensor Part1 2 Sensor Part1 2 When using dual type pyro Sensor , it s possible to detect the direction of movement by checking the switch of T_out signal at D_out=H.