SINGLE
ELEMENT PYROS
FOR GAS
MONITORING
AND MEASURING
PYS 3798 – DigiPyro
®
applications
• Gas sensing and monitoring
Features and Benefits
• Digital output
• Internal temperature reference
• TO-5 metal housing
• Selection of narrow band pass filters
pYroeleCtriC deteCtors For gas monitoring
product description
Excelitas extends the family of DigiPyro® detectors to applications in gas sensing. The PYS 3798 is the
digital equivalent to the analog LHi 807. It includes the additional temperature reference as a sepa-
rate output. The two signals are presented in one 28-bit digital bit stream communicated via a single
wire “direct link” interface to a suitable host microprocessor.
All dimensions in mm
PYS 3798 – DigiPyro
®
Main Parameter
Responsivity, min.
Responsivity, typ.
Match, max.
Noise, max.
Field of view, horizontal
Field of view, vertical
Operating voltage
Supply current
Digital Data
Serial interface update time
ADC resolution
Output data format
ADC sensitivity
ADC output offset
ADC output offset, typ.
temperature Reference
Gain (temperature)
Linearity
Filter, Signal Processing
Digital filter cut off
Symbol
R
min
R
M
max
FoV
FoV
V
DD
I
DDmax
t
REP
PYS 3798
2.2
3.5
-
80
135°
122°
15
13
14
2 x 14
6…7
7000 … 9200
8192
80
-5 … +5
10
Unit
kV / W
kV / W
%
µV
pp
Remark
f = 1 Hz
f = 1 Hz
0.4 …10 Hz / 20° C
Unobstructed
Unobstructed
V
DD
= 3.3 V
V
µA
ms
Bits
Bits
µV/count
Counts
Counts
Counts/K
%
Hz
Max. count = 2
14
-1
-20° C to +80° C
-20° C to +80° C
see note 1)
1) A digital bandpass filter is recommended to cut off output offset.
www.excelitas.com
27
Embedded System
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