A2TPMI

Features:

· Smart thermopile sensor with integrated signal processing.
· Can be adapted to your specific measurement task. · Integrated, calibrated ambient temperature sensor.
· Output signal ambient temperature compensated.
· Fast reaction time.
· Different optics and IR filters available.
· Digital serial interface for calibration and adjustment purposes.
· Analog frontend/backend, digital signal processing.
· E²PROM for configuration and data storage.
· Configurable comparator with high/low signal for remote temperature threshold control.
· TO 39 6 pin housing.




Application

· Miniature remote non contact temperature measurement (pyrometer).
· Temperature dependent switch for alarm or thermostatic applications
· Residential, commercial, automotive, and industrial climate control.
· Household appliances featuring a remote temperature control like microwave oven, toaster, hair dryer.
· Temperature control in laser printers and copiers.
· Automotive climate control.




Specifications

Parameter	Min	MAX
Supply Voltage VDD	-0.3V	+6.5V
Storage Temperature Range (Note 1)	-40	100
Operating Temperature Range	-25	100
Voltage at all inputs and outputs (Note 1)	-0.3V	VDD+0.3V
Current at input pins (Note 2)		+/-5mA
Lead temperature (Soldering, 10sec)		+300
ESD Tolerance (Note 3)		2.5kV

Note 1: Extension to 120°C for limited periods of several minutes possible
Note 2: Limiting input pin current is only necessary for input voltages that exceed absolute maximum input voltage ratings
Note 3: Human body model, 1.5k in series with 100pF. All pins rated per method 3015.7 of MIL-STD-883.

Static-sensitive device. Unused devices must be stored in conductive material. Protect devices from static discharge and static fields. Stresses above those listed under "Absolute maximum ratings" may cause permanent damage to the device. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

Precautions should be taken to avoid reverse polarity of power supply. Reversed polarity of power supply results in a destroyed unit.

Do not expose the sensors to aggressive detergents such as freon, trichlorethylen, etc. Optical windows (e.g. filter, lens) may be cleaned with alcohol and cotton swab.




Description

The PerkinElmer A2TPMI is a versatile infrared thermopile sensor with an integrated configurable ASIC for signal processing and ambient temperature compensation. This integrated infrared module senses the thermal radiation emitted by objects and converts this to a analog voltage.

The A2TPMI can be delivered fully factory calibrated and adapted to the customer specification, as well as customer programmable via the serial interface. In the pre-calibrated version, only three pins are necessary for operation: object output voltage, 5V supply voltage, and ground.

As described in this specification, the temperature accuracy of the fully adjustable integrated circuit outperforms that of the previous PerkinElmer thermopile modules with discrete components on pcb, because the A2TPMI features an offset correction of the amplifier and a factory calibrated ambient temperature sensor. This makes the A2TPMI a versatile, compact and high precision device.

Due to the internal digital signal processing and 8 bit resolution of the internal control registers the A2TPMI has improved accuracy for adjustment and improved performance. E²PROM technology allows unlimited changing of the configuration.

For amplification of the highly sensitive thermopile signal in the micro- to millivolt range, a high resolution programmable low noise chopper amplifier is provided. An adjustable high precision ambient temperature sensor followed by a signal processor, offers an accurate compensation signal with polynomial characteristics that perfectly matches to that of the thermopiles output. Adding of these signals results in an ambient independent object temperature signal over a large temperature range, which still can be adapted / scaled to customer needs due to flexible offset and postgain adjustment facilities of the device.

The two configurable comparators of the A2TPMI, that can alternatively be used, enhance the functionality. This allows to employ the A2TPMI as an temperature dependent switch for alarm purposes. Threshold temperatures and the hysteresis is free programmable for both comparators.

Due to integration of sensor and electronic in a compact TO 39 housing, the A2TPMI is robust and insensitive to environmental influences like pcb contamination (leakage currents), humidity and electromagnetic interference.

The new PerkinElmer thermopile module with integrated ASIC (a2TPMI) for signal processing is based on the TPS 33x series in TO39 size housing. Features: 5 V supply, very low power consumption (<10 mW), extremely precise ambient temperature sensor output, calibrated signal out-put, comparator functions. Integrated optics: Lens, internal mirror. Plug in, instant usable, extremely compact remote temperature sensor module. Applications are e.g.: automotive climate control, home air conditioning, printer / copier temperature control, microwave oven, industrial applications. For detailed technical features refer to the a2TPMI data sheet. For more general information please first see the technical Note for the a2TPMI.