TPMI 데이터 시트보기 (PDF) - PerkinElmer Inc

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TPMI

Thermopile Sensor Module With Integrated Signal Processing

PerkinElmer Inc 

TPMI™ - Thermopile Sensor Module With Integrated Signal Processing

Introduction

The new integrated thermopile module consists of a

thermopile chip and an ASIC, for signal processing,

ambient temperature measurement and compensation of

the object temperature, in a TO-5 sized housing. The

implemented serial communication interface allows fully

automated trimming and calibration of the sensor. The

compact device has only 6 connection pins, from which

only 3 are needed in remote temperature measurement

applications.

This sensor is offered either as single component with

integrated optics or on a printed circuit board (PCB) with

mirror optics and connectors. The TPMI targets

applications where high accuracy, compact size, long term

stability and low cost are essential in industrial, home

appliance or automotive applications.

The new TPMI solution is a significant improvement over

the current PerkinElmer thermopile module (TPM), which

employs an external discrete circuit on a PCB for the

amplification of the signals and for the necessary ambient

temperature compensation. In short, the new TPMI offers

the following advantages over the current solution:

• Compact TO-5 sized housing; calibration of ambient

temperature sensor and object temperature output

performed within ASIC,

• No external components required; PCB version for

upgrade compatibility to current thermopile modules

available (see Fig. 3),

• Effective shielding of low level sensor signals against

electromagnetic interferences,

• Output pins carry amplified signals in the voltage range,

which make the sensor module insensitive against

humidity and leakage currents on PCB or assembly.

Figure 1

Figure 2

The hybrid setup

of the PerkinElmer

thermopile module

with integrated

read-out ASIC.

TPMI on printed

circuit board (PCB)

with mirror optics.

No external

components are

required. The PCB,

however, allows the

possibility to add

external low pass

(integrating) filters.

The shown version

is compatible to the

PerkinElmer TPMF1

thermopile module.

Design Concept

The design of the new integrated thermopile sensor

module includes at first the thermopile detector chip itself.

Further, the ambient temperature sensor and the signal

processing electronics, usually required in addition to the

thermopile detector, are integrated in a mixed

analog/digital ASIC with the following features:

• Adjustable low noise amplifier for amplification of the

signal generated by the thermopile chip,

• Temperature reference sensor with subsequent signal

processing,

• Calculation stage for thermopile signal independence

from ambient temperature,

• Bi-directional serial digital interface for ASIC trimming

and calibration,

• Programmable memory registration for non-volatile

storage of the trimming and calibration adjustments,

• Minimized supply current for reduction of self heating of

the sensor

Figure 1 shows the hybrid setup of the thermopile chip

and the mixed signal ASIC on a TO-39 baseplate with 6

connection pins. The user can choose among a variety of

caps in different heights and window openings, with or

without an integrated mirror or lens. The introduction

photo on page 1 shows a lens design. Figure 2 illustrates

a module with mirror optics configured on a PCB.

www.perkinelmer.com/optoelectronics

Page 2

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