PS25405B
EPIC Ultra High Impedance Movement Sensor
Advance Datasheet
Data Sheet 291951 issue 2
FEATURES
•
•
•
•
•
Ultra high effective input resistance, typically 20G .
Effective input capacitance as low as 15pF.
Upper 3dB point typically 20kHz.
Operates with bipolar power supply from ±2.4V to ±5.5V.
Sensors supplied in a custom package with exposed pins for
surface mount assembly.
Ordering Information
PS25405B
Custom package
-25° to +75°
C
C
APPLICATIONS
•
•
•
•
•
•
Proximity switching of lighting and similar electric circuits
Remote control of TVs and other domestic appliances
Presence detection for security / alarm systems
Room occupancy detection for rescue services
Simple gesture recognition to control children’s toys
Controller-less computer gaming systems
Plessey Semiconductors Electric Potential
Integrated Circuit (EPIC) product line targets a
range of applications.
The PS25405B is an ultra high impedance
non-contact solid state electric potential
sensor. It can be used to detect field
disturbance due to the movement of a near-by
object. This functionality can be employed in
a range of applications including security
motion sensors and non-contact electric
switches for lighting, door opening, toys etc
The device uses active feedback techniques to
both lower the effective input capacitance of the
sensing element (Cin) and boost the input
resistance (Rin). These techniques are used to
realise a sensor with a frequency response
suitable for remote sensing applications.
Fig. 1 The PS25405B Sensor
Fig. 2 Internal circuit of EPIC Movement Sensor
Data Sheet 291951 issue 2
Plessey Semiconductors Ltd.
Design & Technology Centre, Delta 500, Delta Business Park, Great Western Way, Swindon, UK SN5 7XE
Tel: +44 1793 518000
Fax: +44 1793 518030
Web:
www.plesseysemi.com
1
PS25405B
ELECTRICAL CHARACTERISTICS
T
amb
= -25° to +75°
C
C,Vdd/Vss ±2.4V to ±5.5V. The electrical characteristics are guaranteed by either production
test or by design and characterisation. They apply within the specified ambient temperature and supply voltage
unless otherwise stated.
Characteristics
Min.
Supply voltage
Supply current
Effective input resistance
Effective input capacitance
Voltage Gain (Av)
Lower -3dB point
Upper -3dB point
Noise
±2.4
1.5
Value
Typ.
Max.
±5.5
2.5
20
15
10
30
20.0
tbd
3.5
Units
V
mA
G
pF
Conditions
Bipolar supply, Gnd=0V
As measured at the sensor electrode
When measured with 250pF coupling
capacitance
Hz
kHz
Set by internal DC signal rejection
network – coupling capacitor 250pF
-3dB
30Hz
20.0kHz
Fig. 3 Typical Bode Plot for PS25405B Sensor with Coupling through 250pF Capacitor
Data Sheet 291951 Issue 2
Plessey Semiconductors Ltd.
Design & Technology Centre, Delta 500, Delta Business Park, Great Western Way, Swindon, UK SN5 7XE
Tel: +44 1793 518000
Fax: +44 1793 518030
Web:
www.plesseysemi.com
2
PS25405B
PIN ASSIGNMENT
Output
Pin 1
Vss
Pin 4
Gnd
Pin 2
Top View
Vdd
Pin 3
Fig. 4 Pin Assignment for the PS25405B – Top View
MECHANICAL DIMENSIONS
The package diagram is shown below. It is recommended that a solder pad 1.6mm diameter be defined
for the mounting of the sensor pins.
10.50 ± 0.08
2.93 ± 0.06
1.35
±
0.35
7.80 ± 0.64
1.35
±
0.35
1.35 ±0.35
7.80
±
0.64
10.50
±
0.08
1.35 ±0.35
φ
1.0
Bottom
Side
Fig. 5 Mechanical Drawing (all dimensions are nominal and in mm)
Data Sheet 291951 Issue 2
Plessey Semiconductors Ltd.
Design & Technology Centre, Delta 500, Delta Business Park, Great Western Way, Swindon, UK SN5 7XE
Tel: +44 1793 518000
Fax: +44 1793 518030
Web:
www.plesseysemi.com
3
PS25405B
ELECTROSTATIC DISCHARGE (ESD) PROTECTION
The PS25405B is manufactured using a high performance analog CMOS process. As for all CMOS
components, it is essential that conventional ESD protection protocols be applied for the handling of this
device.
PATENTS
This component and many of the associated applications are covered by the following international
patents:
602 32 911.6-08 (DE)
AU2007228660
CA2646411
CN200780026584.8
EP1451595 (CH)
EP1451595 (ES)
EP1451595 (FR)
EP1451595 (IE)
EP1451595 (IT)
EP1451595 (NL)
EP2002273
EP2047284
EP2174416
GB1118970.1
JP2009-500908
JP4391823
TW097126903
TW1308066
US12/293872
US12/374359
US12/669615
US13/020890
US13/163988
US7885700
Data Sheet 291951 Issue 2
Plessey Semiconductors Ltd.
Design & Technology Centre, Delta 500, Delta Business Park, Great Western Way, Swindon, UK SN5 7XE
Tel: +44 1793 518000
Fax: +44 1793 518030
Web:
www.plesseysemi.com
4
For further information about this and other products, please visit:
www.plesseysemiconductors.com
Legal Notice
Product information provided by Plessey Semiconductors Limited (“Plessey”) in this document is believed to be correct and accurate. Plessey
reserves the right to change/correct the specifications and other data or information relating to products without notice but Plessey accepts no
liability for errors that may appear in this document, howsoever occurring, or liability arising from the use or application of any information or
data provided herein. Neither the supply of such information, nor the purchase or use of products conveys any licence or permission under
patent, copyright, trademark or other intellectual property right of Plessey or third parties.
Products sold by Plessey are subject to its standard Terms and Conditions of Sale that are available on request. No warranty is given that
products do not infringe the intellectual property rights of third parties, and furthermore, the use of products in certain ways or in combination
with Plessey, or non-Plessey furnished equipments/components may infringe intellectual property rights of Plessey.
The purpose of this document is to provide information only and it may not be used, applied or reproduced (in whole or in part) for any purpose
nor be taken as a representation relating to the products in question. No warranty or guarantee express or implied is made concerning the
capability, performance or suitability of any product, and information concerning possible applications or methods of use is provided for
guidance only and not as a recommendation. The user is solely responsible for determining the performance and suitability of the product in any
application and checking that any specification or data it seeks to rely on has not been superseded.
Products are intended for normal commercial applications. For applications requiring unusual environmental requirements, extended
temperature range, or high reliability capability (e.g. military, or medical applications), special processing/testing/conditions of sale may be
available on application to Plessey.
Data Sheet 291951 issue 2
Plessey Semiconductors Ltd.
Design & Technology Centre, Delta 500, Delta Business Park, Great Western Way, Swindon, UK SN5 7XE
Tel: +44 1793 518000
Fax: +44 1793 518030
Web:
www.plesseysemi.com
5
京公网安备 11010802033920号
EEWORLD
