SPECTRON SYSTEMS TECHNOLOGY INC.

595 OLD WILLETS PATH

HAUPPAUGE NY 11788

PHONE: 631 582-5600

FAX: 631 582-5671

Specifications are subject to change without notice!

Doc.# SDS-107-1703

The

SA40012 Single Axis CMOS Signal Conditioning Module is a DC input/output operated device, which operates off a

single ended supply, and provides a bipolar DC output. Specifically designed to interface directly with all Spectron Single Axis

Tilt Sensors, this low power consumption conditioner is ideal for battery driven applications. Featuring a PC board mountable

design, the module internally converts the DC input voltage into an AC excitation voltage for the sensor, and demodulates the

sensor output into a smooth amplified DC output voltage. Incorporating a proprietary signal processing algorithm, and an

external temperature compensation sensor (optional), normal measurement errors are severely reduced. The

SA40012 also

features overload protection, and is 100% reliability tested to provide the highest quality available.

General Specifications

Input voltage ...………………………........+5Vdc to +15Vdc

Input current ........………………………... 0.5mA @ +5Vdc, 0.9mA @ +15Vdc

Sensor excitation ..……………………..... 380 mV pp, square wave

Input impedance .……………………....... 5 megohms

Output .......……………………………..... +/-1.5Vdc @+6Vdc supply, referenced to Vref

Note; minimum output = 50mVdc + (supply voltage . 1.5Vdc)

Load ......……………………………...…... 100k ohm minimum

Time constant .......…………………….... 30 msec

Offset adjustment .…………………….... +/-45 mVdc

Output ripple .....……………………….... 0.35% of output voltage (RG 24k ohm)

Temperature coefficients (module w/out sensor)

- Null ......………....... 100 microvolts / C

- Scale ...………....... 0.02% / C

Output short duration ……………......... Continuous (Vout and Vref)

Temperature range

- Operating .……… . -20 to +70C

o

- Storage ...………... -40 to +80C

o

Temperature Compensation

- Temperature compensation of the assembly (module and sensor) can be accomplished using an external silicon

temperature sensor (KTY81-120) and a resistor (.RT., see wiring diagram for typical values). With this configuration, it is

possible to reduce the scale temperature coefficient error from a 0.3%/C

wiring diagram for connection points.

Dimensions