PS25012A1 Datasheet, PDF (1/3 Pages) List of Unclassifed Manufacturers – APPLICATION BOARDS FOR EPIC SENSOR PS25201A

PS25012A1, PS25012B1
Application Boards for EPIC sensor PS25201A
Features
• Ultra high input resistance, typically 5x10¹⁰ Ω.
• Frequency response (3dB) 200mHz to 4.0kHz.
• Wide operating voltage from 4.0 to 8.0V.
• Operating temperature range 0 to 50ºC.
• 200pF load drive capability.
• Ground referenced output.
• DC signal rejection.
• Dual sensor board allows differential operation.
Applications
• Electrophysiological signal detection.
• ECG/EOG/EMG/EEG
• Electric field and potential sensing.
• Movement sensing
Figure 1: PS25012A1 single channel board carrying a
single PS25201A sensor
Figure 1
Description
The PS25012A1 and PS25012B1 are single and
dual channel application boards for the
demonstration of the Plessey PS25201A electric
potential sensor.
The PS25201A electric potential sensors on these
boards allow the measurement of a wide range of
electric potential sources from electrophysiological
signals through to spatial 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 a
thin dielectric that allows the direct application to a
test surface. In the case of contact with skin there is
no need for electrically conductive gel.
The PS25201A sensor demonstrated on these
boards is an integrated assembly designed for
surface mount assembly on a motherboard.
The application boards provide the 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.
Two single channel PS25012A1 boards or a dual
channel PS25012B1 board may be used to generate
a differential signal. A typical example is shown in
Figure 3 below:
Figure 2: PS25012B1 dual channel board carrying
two PS25201A sensors
Figure 3: Differential signal from two sensors in
contact with the skin showing ECG type
characteristics
Data Sheet 291501 issue 1
Plessey Semiconductors Ltd.
Design & Technology Centre, Delta 500, Delta Business Park, Great Western Way, Swindon, UK SN5 7XE
Tel: [phone]
Fax: [phone]
Web: www.plesseysemi.com
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