A
IC for Human Body Detector
Amplifier
for Pyroelectric Infrared Sensor
BD9251FV
No.11096EAT01
●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℃)
Parameter Symbol Ratings Units
Supply Voltage VDD -0.3～7.0 V
1
Power Dissipation Pd 440
※
mW
Operating Temperature T
Storage Temperature T
※1. It reduces 3.5mW/℃ then Ta≧25℃. (On glass epoxy board of 70mm×70mm×1.6mm)
●Operating Conditions
Parameter Symbol
Supply Voltage VDD 2.97 5.0 6.0 V
A1P_IN Offset Voltage V
This product doesn’t design for protection radioactive rays.
-30～75 ℃
opr
-55～125 ℃
stg
Ratings
Min. Typ. Max.
A1P_IN_OFFSET
- 1.5 - V V
Units Conditions
=2.3V
DRAIN
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1/8
2011.10 - Rev.
BD9251FV
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●Electric Characteristics (VDD=5.0V, Ta=25℃)
Parameter Symbol
Min. Typ. Max.
Limits
Units Conditions
Supply Current IDD - 300 400 uA Output no load
Technical Note
DRAIN Output Voltage V
AMP1/AMP2 Input Voltage V
2.0 2.3 - V
DRAIN
IN
0.1 - VDD-0.8 V
AMP1/AMP2 Gain AG - - 46 dB
AMP1/AMP2 Unity Gain AUG - 1 - MHz
AMP1 Input Offset Voltage V
AMP2 Output Offset Voltage V
A2_OUT Output Current (source) I
A2_OUT Output Current (sink) I
- - 10 mV
A1OFF
- 1.5 - V
A2OUT
20 30 - µA
A2OUT1
20 200 - µA
A2OUT2
D_OUT / T_OUT Output "H" Voltage VOH VDD-0.6 - VDD V IOH=-1mA
D_OUT / T_OUT Output "L" Voltage VOL 0 - 0.6 V IOL=+1mA
VDD≧2.97V,
I
≦100µA
DRAIN
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2011.10 - Rev.
BD9251FV
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]
Technical Note
●Electrical characteristic curves (Reference data)
400
350
300
250
200
IDD [uA]
150
100
-30
℃
50
0
23 456 78
75
℃
25
℃
VDD[V]
Fig.1 IDD Fig.2 IDD
400
350
300
250
200
IDD [uA]
150
100
2.97V
50
0
-50 0 50 100
6V
5V
Ta[℃]
3
75
℃
-30
2
DRAIN [V]
1
0
234567
VDD[V]
25
℃
℃
Fig.3 Drain Voltage
(source 100uA)
3
6V
3
6V
0
2
DRAIN[V]
2.97V
1
5V
2
2.97V
DRAIN [V]
1
5V
-10
0uA
-20
RIPPLE REJECTION [dB]
100uA
0
-50 0 50 100
Ta [℃]
Fig.4 Drain Voltage
(source 100uA)
0
0 20 40 60 80 100 120
Isource [uA]
Fig.5 Drain Voltage
(Ta=25℃)
-30
1.E+ 01 1.E+02 1.E+ 03 1.E+04 1.E+ 05 1.E+06
fr eq uency [H z]
Fig.6 Drain Voltage PSRR (Ta=25℃)
VDD=2.97V
0
0
100000
-10
100uA
-10
100uA
-20
RIPPLE REJECTION [dB]
0uA
-30
1.E+ 01 1.E+02 1.E+ 03 1.E+04 1. E+05 1.E+ 06
Fig.7 Drain Voltage PSRR (Ta=25℃)
50
40
30
20
gain [dB]
10
0
-10
1.E+ 01 1.E+02 1.E+ 03 1.E+04 1.E+05 1. E+06 1.E+07
Fig.10 amp1/amp2 closed-loop-gain
fr eq uency [H z]
VDD=5.0V
-30
℃
25
℃
75
fr eq uency [Hz ]
℃
VDD=2.97V
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-20
RIPPLE REJECT ION [dB]
0uA
-30
1.E+ 01 1.E+02 1.E+ 03 1.E +04 1.E+ 05 1.E+06
fr eq uency [H z]
Fig.8 Drain Voltage PSRR (Ta=25℃)
VDD=6.0V
50
40
30
-30
20
gain [dB]
10
0
-10
1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07
℃
25
℃
fr eq uency [Hz ]
75
℃
Fig.11 amp1/amp2 closed-loop-gain
VDD=5V
3/8
10000
1000
war m_up_ti me [us
100
2.97V
10
no load
0.00 0.01 0 .10 1.00 10.00
5V
6V
C2 l oad [uF]
Fig.9 DRAIN VOLTAGE warm_up_time
(Ta=25℃)
50
40
30
20
gain [dB]
10
0
-10
1.E+01 1.E +02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07
-30
℃
25
fr eq uency [Hz]
℃
75
℃
Fig.12 amp1/amp2 closed-loop-gain
VDD=6V
2011.10 - Rev.
BD9251FV
A
●Electrical characteristic curves (Reference data) – Continued
7
6
5
4
3
A2_OU T [V]
2
1
0
234567
Fig.13 AMP2 Output High Voltage
25
℃
-30
℃
VDD [V]
(source 20uA)
75
℃
7
6
5
4
3
A2_OU T [V ]
2
1
0
-50 0 50 100
Fig.14 AMP2 Output High Voltage
(source 20uA)
7
6
5
4
3
A2_OU T [V ]
2
1
2.97V
0
-50 0 50 100
Fig.16 AMP2 Output Low Voltage
(source 20uA)
5V
Ta [℃]
6V
7
6
5
4
3
D_OUT [V]
2
1
-30
℃
0
23 45 67
Fig.17 D_OUT Output Low Voltage
(sink 1mA)
7
6
5
4
T_OUT [V]
3
2
1
-30
0
234567
Fig.19 T_OUT Output Low Voltage
25
℃
VDD [V]
(sink 1mA)
75
℃
℃
7
6
5
4
3
T_OUT [V]
2
1
0
234 567
25℃
-30℃
Fig.20 T_OUT Output High Voltage
6V
5V
2.97V
Ta [℃]
75
25
℃
VDD [V]
VDD [V]
℃
75℃
(source 1mA)
Technical Note
7
6
5
4
3
A2_OU T [V]
2
75
1
-30
0
234567
25
℃
VDD [V]
Fig.15 AMP2 Output Low Voltage
(sink 20uA)
7
6
5
4
D_OUT [V]
3
2
1
0
234 567
25
℃
-30
VDD [V]
℃
Fig.18 D_OUT Output High Voltage
(source 1mA)
℃
℃
75
℃
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4/8
2011.10 - Rev.
BD9251FV
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U
U
●Block Diagram/Application
VDD
Pyroelectric
sensor
DRAIN
D
A1P_IN
S
G
DRAIN
C2
C2
C3
Pyroelectric
sensor
D
A1P_IN
S
C3
G
47kΩ
+
AMP1 AMP2
10kΩ
47kΩ
-
※ Please decide the constant after it confirms i t enough examing the characteristic and th e condition
of the pyroelectric sensor.
+
AMP1 AMP2
-
350kΩ
10kΩ
650kΩ
R2
R1C4
C5 C6 R3 C7
A2P_DI
Voltage
Regul ator
350kΩ
650kΩ
+
-
Voltage
Regulator
+
-
R4
A2P_DI
※ Please decide the constant after it confirms it enough examing the characteristic and the condition
R1C4
of the pyroelectric sensor.
R2
C5 C6 R3 C7
R4
C8
Example of circuit constant：
C1=C2=C3 : 1uF R1=R3 : 47kΩ
C4=C6 : 6.9uF R2=R4 : 4.7MΩ
C5=C7 : 15nF R5 : 220kΩ
C8 : 10uF
●PIN Description
C1
C1
VDD
7.5kΩ33kΩ 33kΩ7.5kΩ
7.5kΩ33kΩ 33kΩ7.5k Ω
REF_OUT COMP_IN
R5
C8
REF_OUT COMP_IN
R5
Technical Note
BD9251FV
BD9251FV
-
+
-
-
+
+
-
+
D_O
T_O
Ｓ
Ｓ
Ｒ
GNDA2_OUTA1N_IN A2N_INA1_OUT
D_OUT
T_OUT
GNDA2_OUTA1N_IN A2N_INA1_OUT
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
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
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5/8
2011.10 - Rev.
BD9251FV
A
A
A
A
A
r
r
●Timing chart ( When using dual type pyro sensor )
Left Right Left Right
Technical Note
1 2→
Pyro senso
Sensor Part
Time axis Time axis
1P_IN
(Pyro sensor output)
2_OUT
(Analog output)
VREF_H side VREF_H side
Comparator output
VREF_L side
Comparator output
Pyro sensor output)
VREF_H
(Analog output)
VREF_L
Comparator output
VREF_L side
Comparator output
1P_IN
2_OUT
VREF_H
VREF_L
Pyro senso
1 2 ←
Sensor Part
D_OUT
D_OUT
T_OUT
T_OUT
※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.
LH H L
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2011.10 - Rev.
BD9251FV
A
●Notes for 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 a
special 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.
(7) PCB design considerations
To reduce the noise from OUTPUT to INPUT , COMP_IN(11pin) and D_OUT(12pin) and T_OUT(13pin) lines away
from Pyro Sensor and A1P_IN(4pin).
Technical Note
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7/8
2011.10 - Rev.
BD9251FV
A
●Ordering part number
B D 9 2 5 1 F V - E 2
Part No. Part No. Package
SSOP-B14
6.4 ± 0.3
0.2
±
4.4
14
1
5.0 ± 0.2
8
0.3Min.
7
0.15 ± 0.1
<Tape and Reel information>
Quantity
Direction
of feed
FV: SSOP-B14
Embossed carrier tapeTape
2500pcs
E2
The direction is the 1pin of product is at the upper left when you hold
()
reel on the left hand and you pull out the tape on the right hand
Packaging and forming specification
E2: Embossed tape and reel
Technical Note
1.15 ± 0.1
0.10
0.65
0.22 ± 0.1
0.1
Direction of feed
(Unit : mm)
Reel
1pin
Order quantity needs to be multiple of the minimum quantity.
∗
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2011.10 - Rev.
Notes
No copying or reproduction of this document, in part or in whole, is permitted without the
consent of ROHM Co.,Ltd.
The content specied herein is subject to change for improvement without notice.
The content specied 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 specications,
which can be obtained from ROHM upon request.
Examples of application circuits, circuit constants and any other information contained herein
illustrate the standard usage and operations of the Products. The peripheral conditions must
be taken into account when designing circuits for mass production.
Great care was taken in ensuring the accuracy of the information specied in this document.
However, should you incur any damage arising from any inaccuracy or misprint of such
information, ROHM shall bear no responsibility for such damage.
The technical information specied herein is intended only to show the typical functions of and
examples of application circuits for the Products. ROHM does not grant you, explicitly or
implicitly, any license to use or exercise intellectual property or other rights held by ROHM and
other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the
use of such technical information.
The Products specied in this document are intended to be used with general-use electronic
equipment or devices (such as audio visual equipment, ofce-automation equipment, communication devices, electronic appliances and amusement devices).
The Products specied in this document are not designed to be radiation tolerant.
While ROHM always makes efforts to enhance the quality and reliability of its Products, a
Product may fail or malfunction for a variety of reasons.
Please be sure to implement in your equipment using the Products safety measures to guard
against the possibility of physical injury, re or any other damage caused in the event of the
failure of any Product, such as derating, redundancy, re control and fail-safe designs. ROHM
shall bear no responsibility whatsoever for your use of any Product outside of the prescribed
scope or not in accordance with the instruction manual.
The Products are not designed or manufactured to be used with any equipment, device or
system which requires an extremely high level of reliability the failure or malfunction of which
may result in a direct threat to human life or create a risk of human injury (such as a medical
instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuelcontroller or other safety device). ROHM shall bear no responsibility in any way for use of any
of the Products for the above special purposes. If a Product is intended to be used for any
such special purpose, please contact a ROHM sales representative before purchasing.
If you intend to export or ship overseas any Product or technology specied herein that may
be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to
obtain a license or permit under the Law.
Notice
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