PS25014A1, PS25014B1
Application Boards for EPIC sensor PS25401A
Features
•
•
•
•
•
•
•
Ultra high
effective i
nput impedance, typically 20G .
Wide operating voltage from 4.0 to 8.0V.
o
Operating temperature range 0 to 50 C.
200pF load drive capability.
Ground referenced output.
DC signal rejection.
Dual sensor board allows differential operation.
Description
The PS25014A1 and PS25014B1 are single and
dual
channel
application
boards
for
the
demonstration of the Plessey PS25401A electric
potential sensor.
The PS25401A electric potential sensors on these
boards allow the measurement of a wide range of
electric potential sources. Two sensors may be used
differentially to determine electric field. The sensors
incorporate a DC block feature that allows the DC
component of an applied signal to be rejected while
maintaining good low frequency response. The
electrode surface of the detector is passivated with
an inert dielectric that provides environmental
protection. These sensors are not intended for direct
coupling to the surface of the skin. In the case of
electrophysiological sensing the following sensors
should be used:
ECG
Sensor
-3dB
Voltage
bandwidth gain
mHz
200
50
200
50
200
50
50
50
10
10
Application
Boards
Single/Dual
PS25012A
PS25012B
PS25012A1
PS25012B1
PS25012A2
PS25012B2
PS25012A3
PS25012B3
PS25012A4
PS25012B4
Applications
•
•
Movement sensing due to electric field
disturbance
Electric field and potential sensing.
Figure 1: PS25014A1 single channel board carrying a
single PS25401A sensor
PS25201
PS25201A
PS25202
PS25203
PS25204
Figure 1
The PS25401A sensor demonstrated on these
boards is an integrated assembly designed for
surface mount assembly on a motherboard.
Figure 2: PS25014B1 dual channel board carrying
two PS25401A sensors
The application boards provide a regulated +2.5V
and generated -2.5V supplies that are used to
operate the sensor. This allows the boards to
demonstrate the sensors from a wide, single sided,
power supply voltage while the output of the sensor
can cover the range ±2.1V.
The boards are
connected by a high reliability five pin connector.
Data Sheet 291514 issue 1
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
PS25012A1, PS25012B1
Electrical Characteristics
These electrical characteristics apply to the PS25014A1 and PS25014B1 application boards that carry the PS25401A
o
sensors. The electrical characteristics (@25 C) are guaranteed by either production test or by design and
characterisation. They apply within the specified supply voltage unless otherwise stated.
Value
Min.
Supply voltage
Supply current; PS25014A1
Supply current; PS25014B1
Effective input
impedance
Effective input capacitance
Voltage Gain (Av)
Noise
4.0
2.7
5.4
20
15
50
tbd
Typ.
Max.
8.0
10.0
20.0
tbd
V
mA
mA
G
pF
Each PS25401A sensor consumes
2.0mA (typ). The additional current
is consumed by the app’n board.
Units
Characteristics
Conditions/Notes
Electrical Connector
The PS25014A1 and PS25014B1 application boards are fitted with one or two five pin sockets. The connectivity of
these sockets is shown below:
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Output
Gnd
Supply
Gnd
Not used
The supply and ground connections of the two sockets on the dual channel PS25014B1 board are connected in
parallel so that the board will be active with either one or both connectors in use. However, when both sockets are
powered the supplied voltages must be identical.
Auxiliary Components
PS25000A
Control and Interface Box; 50Hz.
This box provides power for one or two sensors. It incorporates switchable low pass and 50Hz notch
filters. The box contains an amplifier with switchable gain of either x1 or x10. The box also generates
a differential signal from two sensors. The box incorporates a data acquisition card that provides the
data from the sensors via a USB cable to a computer. The box is powered by the USB connection. A
soft scope is provided with this box for display of the signals on a computer.
Control and Interface Box; 60Hz.
This box is identical to the PS25000A except that the switchable notch filter is preset to reject 60Hz.
Adapter cable.
This 1.5m long cable connects the sockets of the EPIC application boards to the PS25000A or
PS25001A Control and Interface Box.
PS25001A
PS25013
Data Sheet 291514 Issue 1
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
PS25012A1, PS25012B1
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 291514 Issue 1
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
