Datasheet Integrated Sensor SMD
Type HCM Cx2 FxFeatures and Benefits- Small size, low cost, integrated ASIC with analog outputs- Surface mountable ceramic leadless chip carrier CLCC, square, width 3.8mm- Operating range 2.7V to 5.5V , -40°C to 120°C- Sensor gain adjustable to 4300 or 2150 (preset 4300 by internal pull-up res.)- Integrated linear temperature reference with a sensitivity of typical 16mV/°C- Large variety of available filter types for different application

Ordering Information
HCM -> Heimann thermopile sensor and ASIC in a SMD ceramic carrier
Cx2 -> „C“ ceramic carrier 3.8mm ; „x“ sensor chip (list) ; „2“ ASIC typeFx -> application-specific filter type (list)
Sensor Chip Selection
Parameter

Sensor chip “1”Sensor chip “1C”

Sensor chip “2”Absorbing area

0.61 x 0.61mm²

0.76 x 0.76mm²

1.2 x 1.2mm²

Sensitivity

50 V/W

46 V/W

38 V/W

Voltage response

19 Vmm²/W

27 Vmm²/W

55 Vmm²/W

Resistance

85 kOhm

85 kOhm

85 kOhms

Time constant

5 ms

6 ms

8ms

Filter Selection
ApplicationSpecification

F4.26-180

CO2 gas detection

NBP CWL 4.26µm HPB 180nm

F4.43-60

CO2 gas detection

NBP CWL 4.43µm HPB 60nm

F4.64-180

CO gas detection

NBP CWL 4.64µm HPB 180nm

F3.30-160

HC gas detection

NBP CWL 3.30µm HPB 160nm

F3.37-190

HC gas detection

NBP CWL 3.375µm HPB 190nm

F3.91-90

gas reference

NBP CWL 3.91µm HPB 90nm

F5.5

temperature detection

LWP Cut On 5.5µm

F8-14

temperature detection

BP HPP 8µm to 14µm

Please contact Heimann customer service for special filter requirements.

HEIMANN Sensor GmbH
Grenzstr. 22
D-01109 Dresden
Rohrbergstr. 7D-65343 EltvilleManaging Director
Dr. J. Schieferdecker
Reg. at District Court
Dresden HRB20692
VAT-ID DE813444739

Internet: www.heimannsensor.com
Mail: info@heimannsensor.com
Phone 49 (0) 6123 60 50 30Fax
49 (0) 6123 60 50 39

Datasheet HCM Cx2 Fx R06 MAR 2012 Page 1 of 5

Filter Type

Datasheet Integrated Sensor SMD
Type HCM Cx2 Fx
Operating Conditions
Parameter

Typical Value

UnitCondition

Supply voltage VDD(2.7).. 3 .. 5..(5.5)

V+Vs

Supply voltage VSS

0V-Vs , Ground

Supply current

1mA

Without load

Open loop gain

90dB

Low pass frequency

240

HzPSRR>40dB

Output voltage range

0.15 .. (VDD-0.15)

VStart up time after POR

Max. 0.5

secElectrical start up

Noise voltage input related

45nV/√Hz

Output TPO; Sensor + ASIC

Zero input sensor signal

1.3V

Output TPO

Sensor gain adjustment

4300 or 2150

V/V

Output TPO ; adjustable

Temp. ref. voltage at 25°C

1.5V

Output TRO

Sensitivity temp. reference

16mV/°CLinear ; Output TRO

Field of view

120degree

Operating temperature-40.. 120°C

ASIC

Pin Assignment
SymbolDescription

1GAIN

Gain factor 4300 (Internal pullup or VDD on GAIN)
Gain factor 2150 (VSS/GND onGAIN)

3

VDD

Positive supply voltage

4/
8VSS/
GND

Negative supply voltage /Ground (0V)

6

TPO

Amplified thermopile sensor
output voltage

7TRO

Analog temperature reference
output voltage

HEIMANN Sensor GmbH
Grenzstr. 22
D-01109 Dresden
Rohrbergstr. 7D-65343 EltvilleManaging Director
Dr. J. Schieferdecker
Reg. at District CourtDresden HRB20692
VAT-ID DE813444739

Internet: www.heimannsensor.com
Mail: info@heimannsensor.com
Phone 49 (0) 6123 60 50 30Fax49 (0) 6123 60 50 39

Datasheet HCM Cx2 Fx R06 MAR 2012 Page 2 of 5PinNo.

Datasheet Integrated Sensor SMD
Type HCM Cx2 Fx
PCB Footprint

Reflow Furnace Profile
300
Thermal Profile for Reflow Soldering

200

150

100

5000123Time / Minutes

45

Suitable for lead free soldering.
The shown thermal profile should not be exceeded or component damage may result.

HEIMANN Sensor GmbHGrenzstr. 22D-01109 Dresden
Rohrbergstr. 7D-65343 EltvilleManaging Director
Dr. J. Schieferdecker
Reg. at District Court
Dresden HRB20692
VAT-ID DE813444739

Internet: www.heimannsensor.com
Mail: info@heimannsensor.com
Phone 49 (0) 6123 60 50 30
Fax
49 (0) 6123 60 50 39

6Datasheet HCM Cx2 Fx R06 MAR 2012 Page 3 of 5

Temperature / °C250

Datasheet Integrated Sensor SMD
Type HCM Cx2 FxDimensions
HCM C12 ..

HCM C1C2 ..

Changes or modifications at the product which haven't influence to theperformance and/or quality of the device haven't to be announced to thecustomers in advance. Customers are requested to consult with Heimann Sensor
representatives before the use of Heimann Sensor products in special
applications where failure or abnormal operation may directly affect human lives
or cause physical injury or property damage. The company or theirrepresentatives will not be responsible for damage arising from such use without
prior approval.

HEIMANN Sensor GmbH
Grenzstr. 22
D-01109 Dresden
Rohrbergstr. 7D-65343 EltvilleManaging Director
Dr. J. Schieferdecker
Reg. at District CourtDresden HRB20692
VAT-ID DE813444739

Internet: www.heimannsensor.com
Mail: info@heimannsensor.com
Phone 49 (0) 6123 60 50 30
Fax49 (0) 6123 60 50 39

Datasheet HCM Cx2 Fx R06 MAR 2012 Page 4 of 5Liability

Datasheet Integrated Sensor SMD
Type HCM Cx2 Fx
Application Circuitry

Due to use of chopper-stabilized amplifiers residual ripples of chopping
frequency can interfere on the outputs in the range of 20kHz.
Software filtering or for resisitive loads of ≥1MΩ simple RC low pass filtering canbe used to suppress the ripple. Sample circuitry is shown on above picture.

Application Hints

II(0)
kLc

-> radiant flux at the point of measurement-> base radiant flux of the test system without gas absorption-> constant (gas and filter specific)-> measuring distance-> gas concentration

The radiant flux is proportional to the output voltage of the sensor module :U/U(0) ~ I/I(0) .
A special infrared light source is used to generate the radiant heat. The infrared
source needs to be pulsed to eliminate parasitic temperature influences.
Don't hesitate to contact HEIMANN Sensor for support to use our long-time
experience in infrared sensors and sensor modules.

HEIMANN Sensor GmbHGrenzstr. 22D-01109 DresdenRohrbergstr. 7D-65343 EltvilleManaging Director
Dr. J. Schieferdecker
Reg. at District Court
Dresden HRB20692
VAT-ID DE813444739

Internet: www.heimannsensor.com
Mail: info@heimannsensor.com
Phone 49 (0) 6123 60 50 30
Fax
49 (0) 6123 60 50 39

Datasheet HCM Cx2 Fx R06 MAR 2012 Page 5 of 5A gas concentration can be measured by monitoring the absorption of an infraredlight beam. The base equation for gas concentration measurement in the infrared
way is Beer’s law :I=I(0)*exp(-k*c*L)