BD9251FV_11 ROHM [Rohm], BD9251FV_11 Datasheet - Page 7

• Manufacturer Part Number: BD9251FV_11
• Description: IC for Human Body Detector Amplifier for Pyroelectric Infrared Sensor
• Manufacturer: ROHM [Rohm]

●Notes for use
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BD9251FV
(1) Absolute maximum ratings
(2) GND potential
(3) Short circuit mode between terminals and wrong mounting
(4) Actions in strong magnetic field
(5) Mutual impedance
(6) About warm-up time
(7) PCB design considerations
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.
Ensure a minimum GND pin potential in all operating conditions.
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.
Use caution when using the IC in the presence of a strong magnetic field as doing so may cause the IC to malfunction.
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.
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.
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).
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Technical Note
2011.10 - Rev.A