BD3893FV-E2

Description
Features
Applications
HDD, CD, DVD drive
Dimension (Unit : mm)
Derating : 4.0mW/˚C for operation above Ta=25˚C
This product is not designed for protection against radioactive rays.
The BD3893FV is a shock sensor signal processing IC
for HDD, CD/DVD drive that detects a shock by signal
from sensor by connecting an external shock sensor.
It is available for shock sensors of voltage sensitivity type
and electric charge sensitivity type. This IC incorporates
high-resistance (50M) to compose a charge amplifier.
1) Available for shock sensor of voltage sensitivity type
and electric charge sensitivity type
2) Built-in 50M of resistance for pre-amplifier
3) Available for applications of flag detection type and
analog signal output type
4) Built-in secondary LPF
5) Cut-off frequency of LPF can be changed to 2k, 4k, 8k and 12k
6) Internal reference voltage selectable
(Resistance split voltage, band gap voltage)
SSOP-B16
9
8
16
1
0.1
6.4 ± 0.3
4.4 ± 0.2
5.0 ± 0.2
0.15 ± 0.1
0.22 ± 0.1
0.65
1.15 ± 0.1
0.3Min.
0.1
BD3893FV
Shock Sensor Signal Processing IC
Supply voltage VDD
-
3.0 5.5
V
Recommended Operating Conditions (Ta=25˚C)
Parameter Min. Max. UnitTyp.Symbol
Absolute Maximum Ratings (Ta=25˚C)
Supply voltage
Power dissipation
Storage temperature range
Parameter Symbol
Limits
Unit
VDD
Pd
Tstg
400
+125
–0.3
–55
+6.0
~
~
mW
˚C
Operating temperature range
Topr
+75–25
~
˚C
V
Terminal voltage
VIN
–0.3
VDD+0.3
~
V
Block Diagram
Current consumption
<2nd step Op. Amp.>
4
2
V
V
mA
IDD
RSEL=Low
VDD=5V, VSEL=Low
VDD=3.3V, VSEL=High
FC1=Low, FC2=Low,
-
3dB
FC1=Low, FC2=High,
-
3dB
FC1=High, FC2=Low,
-
3dB
FC1=High, FC2=High,
-
3dB
VDD=3.3V, VSEL=Low
VDD=3.3V, VSEL=High
1.12 1.281.2 VVREF3
VDD=3.3V, VSEL=Low
1.59 1.711.65VREF2
VDD=5V, VSEL=Low
2.42 2.582.5VREF1
30 50
M
RBIAS
28 3230
dB
GV
Reference voltage 1
<Reference voltage>
Reference voltage 2
Reference voltage 3
<Pre-Op. Amp.>
Internal resistor
Gain
<Low pass filter>
Cut-off frequency 1
Cut-off frequency 2
Cut-off frequency 3
Cut-off frequency 4
<Window comparator>
2.9 3.13 VVTRIP1H
6 21.612 kHzFCLP4
4 14.48 kHzFCLP3
2 7.24 kHzFCLP2
1 3.62 kHzFCLP1
1.91 2.092 VVTRIP1L
1.9 2.061.98 VVTRIP2H
1.24 1.41.32 VVTRIP2L
1.38 1.621.5 VVTRIP3H
0.8 1.00.9 VVTRIP3L
Trip voltage 1
Trip voltage 2
Trip voltage 3
Electrical characteristics (Unless otherwise noted; Ta=25˚C, VDD=5V)
Symbol
Min.
Max.
Unit
Conditions
Typ.
Parameter
BIASR OUT1 IN1M IN1P VSEL VSS
VDDFC2FC1DETCOMPINOUT3OUT2
RSELREFOUT
VSEL
VSEL
VSEL
bandgap
ref
Reference
Block
Comparator
LPF2nd stage OpAmp
1st stage OpAmp
/RSEL /RSEL
RSEL
RSEL
REFOUT
50M
REFOUT
amp2
amp3
amp1
BD3893FV
IN2
910111213141516
1 2 3 4 7 865
Appendix
Appendix1-Rev1.0
The products listed in this document are designed to be used with ordinary electronic equipment or devices
(such as audio visual equipment, office-automation equipment, communications devices, electrical
appliances and electronic toys).
Should you intend to use these products with equipment or devices which require an extremely high level of
reliability and the malfunction of with would directly endanger human life (such as medical instruments,
transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other
safety devices), please be sure to consult with our sales representative in advance.
Notes
No technical content pages of this document may be reproduced in any form or transmitted by any
means without prior permission of ROHM CO.,LTD.
The contents described herein are subject to change without notice. The specifications for the
product described in this document are for reference only. Upon actual use, therefore, please request
that specifications to be separately delivered.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard
use and operation. Please pay careful attention to the peripheral conditions when designing circuits
and deciding upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams information, described herein
are intended only as illustrations of such devices and not as the specifications for such devices. ROHM
CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any
third party's intellectual property rights or other proprietary rights, and further, assumes no liability of
whatsoever nature in the event of any such infringement, or arising from or connected with or related
to the use of such devices.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or
otherwise dispose of the same, no express or implied right or license to practice or commercially
exploit any intellectual property rights or other proprietary rights owned or controlled by
ROHM CO., LTD. is granted to any such buyer.
Products listed in this document use silicon as a basic material.
Products listed in this document are no antiradiation design.
About Export Control Order in Japan
Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control
Order in Japan.
In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause)
on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction.

BD3893FV-E2

Mfr. #:
Manufacturer:
Description:
Audio DSPs SIGNAL PROCESSOR
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet