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
Supply Voltage
Power Dissipation
Operating Temperature
Storage Temperature
Symbol
V
DD
Pd
T
opr
T
stg
Ratings
-0.3½7.0
440
※
1
-30½75
-55½125
Units
V
mW
℃
℃
※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
V
DD
V
A1P_IN_OFFSET
Ratings
Min.
2.97
-
Typ.
5.0
1.5
Max.
6.0
-
Units
V
V
V
DRAIN
=2.3V
Conditions
This product doesn’t design for protection radioactive rays.
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© 2011 ROHM Co., Ltd. All rights reserved.
1/8
2011.10 - Rev.A
BD9251FV
●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
I
DD
V
DRAIN
V
IN
A
G
A
UG
V
A1OFF
V
A2OUT
I
A2OUT1
I
A2OUT2
V
OH
V
OL
Limits
Min.
-
2.0
0.1
-
-
-
-
20
20
V
DD
-0.6
0
Typ.
300
2.3
-
-
1
-
1.5
30
200
-
-
Max.
400
-
V
DD
-0.8
46
-
10
-
-
-
V
DD
0.6
Units
uA
V
V
dB
MHz
mV
V
µA
µA
V
V
I
OH
=-1mA
I
OL
=+1mA
Technical Note
Conditions
Output no load
VDD≧2.97V,
I
DRAIN
≦100µA
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© 2011 ROHM Co., Ltd. All rights reserved.
2/8
2011.10 - Rev.A
BD9251FV
●Electrical
characteristic curves (Reference data)
400
350
300
IDD [uA]
75
℃
Technical Note
400
350
300
DRAIN [V]
3
6V
75
℃
IDD [uA]
250
200
150
100
50
0
2
3
4
5
VDD[V]
6
7
8
-30
℃
25
℃
250
200
150
100
50
0
-50
0
Ta[
℃
]
50
100
2.97V
5V
2
25
℃
-30
℃
1
0
2
3
4
5
VDD[V]
6
7
Fig.1 IDD
Fig.2 IDD
Fig.3 Drain Voltage
(source 100uA)
0
3
6V
3
6V
RIPPLE REJECTION [dB]
2
DRAIN[V]
2.97V
5V
DRAIN[V]
2
2.97V
5V
-10
100uA
1
1
-20
0uA
0
-50
0
Ta [
℃
]
50
100
0
0
20
40
60
80
Isource [uA]
100
120
-30
1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06
frequency [Hz]
Fig.4 Drain Voltage
(source 100uA)
0
Fig.5 Drain Voltage
(Ta=25℃)
0
Fig.6
Drain Voltage PSRR (Ta=25℃)
VDD=2.97V
100000
RIPPLE REJECTION [dB]
RIPPLE REJECTION [dB]
-10
100uA
-10
100uA
warm_up_time [us]
10000
1000
5V
6V
-20
0uA
-20
0uA
-30
1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06
frequency [Hz]
100
2.97V
-30
1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06
frequency [Hz]
10
no load
0.00
0.01
0.10
C2 load [uF]
1.00
10.00
Fig.7
Drain Voltage PSRR (Ta=25℃)
VDD=5.0V
Fig.8 Drain Voltage PSRR (Ta=25℃)
VDD=6.0V
50
40
30
gain [dB]
20
25
℃
10
75
℃
0
-10
1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07
Fig.9 DRAIN VOLTAGE warm_up_time
(Ta=25℃)
50
40
30
gain [dB]
50
40
30
gain [dB]
-30
℃
20
25
℃
10
75
℃
0
-10
1.E+01 1.E+021.E+03 1.E+041.E+05 1.E+061.E+07
frequency [Hz]
-30
℃
-30
℃
20
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
℃
75
℃
frequency [Hz]
frequency [Hz]
Fig.10 amp1/amp2 closed-loop-gain
VDD=2.97V
Fig.11 amp1/amp2 closed-loop-gain
VDD=5V
Fig.12 amp1/amp2 closed-loop-gain
VDD=6V
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© 2011 ROHM Co., Ltd. All rights reserved.
3/8
2011.10 - Rev.A
BD9251FV
●Electrical
characteristic curves (Reference data) – Continued
7
6
5
A2_OUT [V]
4
3
2
1
0
2
3
4
5
6
7
VDD [V]
-30
℃
25
℃
A2_OUT [V]
75
℃
7
6
6V
5
4
3
2.97V
2
1
0
-50
0
Ta [
℃
]
50
100
Technical Note
7
6
5
A2_OUT [V]
5V
4
3
2
1
0
2
3
4
5
6
7
VDD [V]
-30
℃
25
℃
75
℃
Fig.13 AMP2 Output High Voltage
(source 20uA)
7
6
5
A2_OUT [V]
Fig.14 AMP2 Output High Voltage
(source 20uA)
7
6
5
D_OUT [V]
D_OUT [V]
4
3
2
Fig.15 AMP2 Output Low Voltage
(sink 20uA)
7
6
5
4
3
-30
℃
2
25
℃
75
℃
4
3
2
1
0
-50
0
Ta [
℃
]
50
100
2.97V
5V
6V
1
0
2
-30
℃
3
4
25
℃
75
℃
1
0
5
6
7
2
3
4
5
6
7
VDD [V]
VDD [V]
Fig.16 AMP2 Output Low Voltage
(source 20uA)
7
6
5
T_OUT [V]
4
3
2
1
0
2
3
4
5
6
7
VDD [V]
-30
℃
25
℃
75
℃
Fig.17 D_OUT Output Low Voltage
(sink 1mA)
7
6
5
T_OUT [V]
4
3
2
1
0
2
3
4
5
VDD [V]
6
7
Fig.18 D_OUT Output High Voltage
(source 1mA)
25℃
-30℃
75℃
Fig.19 T_OUT Output Low Voltage
(sink 1mA)
Fig.20 T_OUT Output High Voltage
(source 1mA)
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© 2011 ROHM Co., Ltd. All rights reserved.
4/8
2011.10 - Rev.A
BD9251FV
●Block
Diagram/Application
C1
C1
BD9251FV
BD9251FV
Technical Note
VDD
VDD
DRAIN
DRAIN
C2
Voltage
Regulator
Voltage
Regulator
C2
Pyroelectric
sensor
Pyroelectric
sensor
350kΩ
D
A1P_IN
S
+
AMP1
33kΩ
+
AMP2
-
+
D_OU
7.5kΩ
650kΩ
D
A1P_IN
S
C3
10kΩ
G
47kΩ
C3
-
-
350kΩ
33kΩ
T_OU
Ｓ
10kΩ
7.5kΩ 33kΩ
G
+
AMP1
+
AMP2
-
+
-
+
D_OUT
47kΩ
7.5kΩ
650kΩ
-
-
Ｓ
T_OUT
A1N_IN
A1_OUT
A2P_DI
A2N_IN
A2_OUT
REF_OUT COMP_IN
+
7.5kΩ
33kΩ
-
GND
Ｒ
R2
C4
R1
C5
C6
R3
R4
C7
C8
R5
※
Please decide the constant after it confirms it enough examing the characteristic and the condition
of the pyroelectric sensor.
A1N_IN
A1_OUT
A2P_DI
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 examing the characteristic and the condition
of the pyroelectric sensor.
Example of circuit constant：
C1=C2=C3 : 1uF
C4=C6
: 6.9uF
C5=C7
: 15nF
C8
: 10uF
●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
R1=R3
R2=R4
R5
: 47kΩ
: 4.7MΩ
: 220kΩ
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
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© 2011 ROHM Co., Ltd. All rights reserved.
5/8
2011.10 - Rev.A
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