Datasheet
A2TPMI
Ô
Thermopile with integrated signal processing circuit
FEATURES
·
·
·
·
·
·
·
·
·
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Smart thermopile sensor with integrated
signal processing.
Can be adapted to your specific meas-
urement task.
Integrated, calibrated ambient tempera-
ture sensor.
Output signal ambient temperature com-
pensated.
Fast reaction time.
Different optics and IR filters available.
Digital serial interface for calibration and
adjustment purposes.
Analog frontend/backend, digital signal
processing.
2
E PROM for configuration and data stor-
age.
Configurable comparator with high/low
signal for remote temperature threshold
control.
TO 39 6 pin housing.
APPLICATIONS
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·
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Miniature remote non contact temperature
measurement (pyrometer).
Temperature dependent switch for alarm or
thermostatic applications
Residential, commercial, automotive, and in-
dustrial climate control.
Household appliances featuring a remote tem-
perature control like microwave oven, toaster,
hair dryer.
Temperature control in laser printers and copi-
ers.
Automotive climate control.
·
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FUNCTIONAL DIAGRAM
Offset correction
+
TP
-
Switch A
Comp 1
Switch C
V1
+
V2
V
Tobj
PTAT
Serial Interface
(SCLK, SDAT)
Signal-
processor
Vref
Comp 2
Control Unit
Switch B
Switch D
V
Tamb
/ V
Ref
TP:
PTAT:
Thermopile
Temperature Sensor
V
Tobj
:
V
Tamb
:
V
Ref
:
Output voltage object temperature
Output voltage ambient temperature
1.225 V reference voltage
A2TPMI Datasheet Rev4
Page 1 of 21
Rev. Oct 2003
Datasheet
DESCRIPTION
A2TPMI
Ô
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 out-
performs that of the previous PerkinElmer thermopile modules with discrete components on pcb, be-
cause the A2TPMI features an offset correction of the amplifier and a factory calibrated ambient tem-
perature 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
2
A2TPMI has improved accuracy for adjustment and improved performance. E PROM technology allows
unlimited changing of the configuration.
For amplification of the highly sensitive thermopile signal in the micro- to millivolt range, a high resolu-
tion programmable low noise chopper amplifier is provided. An adjustable high precision ambient tem-
perature 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 de-
vice.
The two configurable comparators of the A2TPMI, that can alternatively be used, enhance the function-
ality. 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 electro-
magnetic interference.
A2TPMI Datasheet Rev4
Page 2 of 21
Rev. Oct 2003
Datasheet
TPMI Ordering Information
Part code:
Series (sn)
A2
A2TPMI
Ô
nnn
Pnx
MxGxx
xxxx
sn
TPMI
n3c
xxx
Gxx
Oxx
analog ASIC - version 1
TPMI
- TO 39 housing
- 5 isolated pins, 1 ground pin to housing
- internal ASIC for signal conditioning
Sensor chip and cap (n3c)
chip:
2
0.7 x 0.7 mm absorber (standard)
n=3
digit "3":
cap:
c=4
c=6
c=7
temperature reference included (standard for TPMI)
standard cap, window diameter 2.5 mm , fov = 60°
/ lens cap of various lengths
high cap, additional internal optics, e.g. internal reflector (IR)
2
square hole 3.5 x 3.5 mm , low cap, large fov = 100°
2
Sensor optics (xxx)
blank
standard filter with 5.5 µm cut-on wavelength
L-x.y
silicon lens with x.y mm focal length
IRA
internal reflector (mirror)
A
internal aperture
Infrared filter on sensor (Gxx)
blank
standard filter with 5.5 µm cut-on wavelength
G9
pyrometry filter, 8..14 µm bandpass
Gxx
PerkinElmer specified broadband or (narrow) bandpass filter
Output configuration (Oxx)
Pin V
Tobj
A
ambient temperature compensated output voltage representing object temperature
B
not compensated output voltage
C
comparator 1 enabled
Pin V
Tamb
A
V
C
output voltage representing ambient (sensor) temperature
V
ref
= 1.225 V
comparator 2 enabled
Temperature sensing range (n)
nnn
-20 ... nnn°C (remark: for object T range < 100°C the min. T-range may be >20°C)
Option: Printed circuit board (pcb)
standard pcb 17 x 33 mm
2
P1
mini pcb 17 x 20 mm
2
P3
L1 or L2
electrical low pass filter on pcb (L1 = 1st order with RC; L2 = 2nd order with OpAmp)
Option: External optics and filter
ML / MR / MF mirror left / right / front looking
G
standard filter glued to mirror
G12
G12 (uncoated silicon) filter glued to mirror
Option: Connector
blank
none
WTB
wire to board
I / JxT
I = customer specific connector / J = standard JST connector, x = no of pins, top entry
I / JxS
I = customer specific connector / J = standard JST connector, x = no of pins, side entry
I / JxxC
with counterpart
A2TPMI Datasheet Rev4
Page 3 of 21
Rev. Oct 2003
Datasheet
Examples:
·
A2TPMI 334-L5.5 OAA 100 and A2TPMI 334-L5.5 OAA 300
A2TPMI
Ô
are standard configurations of the PerkinElmer TPS 334 sensor with integrated A2TPMI ASIC and
lens optics with 7° field of view adapted to an object temperature range –20…+100°C and
-20…300°C, respectively.
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A2TPMI 334 OAA 140 P1L1 MLG12 J4T
features the PerkinElmer TPS 334 sensor with integrated A2TPMI ASIC on a standard pcb (P1).
An RC circuit serves as a low pass filter to block the chopper frequency. The optics is the standard
left looking mirror with attached protection filter. A 4 pin JST connector with top entry is used. The
object temperature range is set to –20…100°C. Typical module for microwave oven application.)
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A2TPMI 334 OAA 60
features the PerkinElmer TPS 334 sensor with integrated A2TPMI ASIC. No additional optics – the
sensor looks with full field of view into the surrounding. The temperature range is –10…60°C. (This
is a typical module for air conditioner application.)
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A2TPMI 334 L5.5 OAA 250 P3L2 J6S
features the PerkinElmer TPS 334-L5.5 sensor with integrated A2TPMI ASIC and build-in 5.5 mm
nd
lens on a miniature pcb. It has an additional 2 order low pass filter with operation amplifier to
block the chopper frequency. The connector is a 6 pin side entry connector and the temperature
range is –20…250°C. This is a high performance module for industrial applications. The 6 pin con-
nector gives access to the serial interface of the module.
·
For data visualization and for configuration changes a versatile application kit with PC software is
available. Please ask for details.
Labeling
Sensor:
SSSS
XYY
HHH
AA
Example:
SSSS
XYYHHH
AA
Last four digits of the device part number
X = Last digit of the calendar year, YY = Week of the calendar year
Serial number of the production lot
Calibration encoding
A
XYYHHH
A
PCB Version:
Sensors assembled on a PCB are labeled with a sticker having a letter and a serial number printed on.
The letter describes the manufacturing site as follows:
H
B
E
Production parts made in Germany
Production parts made in Indonesia
Engineering samples
A2TPMI Datasheet Rev4
Page 4 of 21
Rev. Oct 2003
Datasheet
Absolute Maximum ratings
Parameter
Supply Voltage VDD
Storage Temperature Range (Note 1)
Operating Temperature Range
Voltage at all inputs and outputs (Note 1)
Current at input pins (Note 2)
Lead temperature (Soldering, 10sec)
ESD Tolerance (Note 3)
Min
-0.3 V
-40 °C
-25°C
-0.3 V
A2TPMI
Ô
MAX
+6.5 V
100°C
100°C
VDD +0.3 V
+/- 5mA
+300°C
2.5 kV
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, 1.5kW 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.
Electrical Characteristics
Unless otherwise indicated, all limits specified for
T
A
= 25°C, V
DD
= +5 V
Symbol Parameter
Min
Typ
Max
Unit
Conditions
Power Supply
V
DD
I
DD
Supply Voltage
Supply Current
4.5
5
1.5
5.5
2
V
mA
R
L
> 1MW
Outputs V
Tobj
/ V
TambESD
V
O
R
O
R
L
C
L
I
SC
Output Voltage Swing
Output Resistance
Resistive Output Load
Capacitive Output Load
Output short circuit current
13
mA
Sinking
50
100
6
500
0.25
V
DD
–
0.25V
100
V
W
kW
pF
mA
Sourcing
I
out
: -100mA … +100mA
Serial Interface SDAT, SCLK
V
iL
V
iH
I
iL
I
iH
Low level input voltage
High level input voltage
Low level input current
High level input current
0.7V
DD
-600
-200
1
0.3 V
DD
V
V
mA
mA
A2TPMI Datasheet Rev4
Page 5 of 21
Rev. Oct 2003
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