SMPX140 Series of Hybrid Detectors
The SMPX140 series is a range of hybrid opto-electronic components incorporating a 15mm
2
PIN photodiode, operational
amplifier and transimpedance circuitry. The photodiode is operated at zero bias for best linearity and lowest dark current.
Features
Incorporation of the photodiode and amplifier into a welded metal can (with or without the optional electrostatic screening
mesh) minimises noise pickup, leakage current errors and stray capacitance normally associated with discrete designs.
Various optical filters can be incorporated inside the package to pass selected regions of the ultra-violet to infra-red
spectrum. The optical filters can be ionically coloured glass or vapour-deposited dielectric layers on a glass substrate. For
more details of the filter permutations, contact Semelab Plc.
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Gain, bandwidth and filter can be specified to suit application
High Sensitivity
Photodiode size: 4 x 4 mm
Integral optical filter option
Low input bias current: 1 pa (typ) @ 25°c
Low amplifier input offset voltage: 500µV (max) @ 25°c
Low noise voltage: < 12nv/√hz @ 1 KHz
Supply voltages: + 5v to + 8v
Wide intrinsic bandwidth: > 2MHz (typ )
High transimpedance gain possible: 47MΩ max.
EMI screening mesh available
Circuit Schematic SMPX140 Series
Typical
values
Applications
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Medical instruments
Document verification
Laboratory instrumentation
Position and proximity detectors
Photographic analysers
Smoke detectors
Fibre-optic detectors
NB: SMPX140 series max supply voltage:
±8V
Semelab Plc reserves the right to change test conditions, parameter limits and package dimensions without notice. Information furnished by
Semelab is believed to be both accurate and reliable at the time of going to press. However Semelab assumes no responsibility for any errors or
omissions discovered in its use. Semelab encourages customers to verify that datasheets are current before placing orders
Document No: X
Issue: 1
SMPX140 Series of Hybrid Detectors
Specifications
(Typical at 25°C unless otherwise stated)
Photodiode
Parameter
Responsivity (see chart)
Active area
Dark Current
vs. temperature
Capacitance
Conditions
350nm
900nm
Vr =1V bias
0V bias
Value
>0.12
0.55
15
250 (typ)
doubles every 8°C
170 (typ)
Units
A/W
A/W
mm
2
pA
pF
Spectral Responsivity of SMPX140 devices with and without integral optical filters
1
0.8
Unfiltered
Relative
Responsivity
0.6
0.2
0.0001
0.4
U340 magnified
BG18
RG850
0.1
X2
U340 magnified X2000
0.2
U340
0
200
400
600
800
1000
1200
0
200
250
300
350
400
0
650
675
700
725
750
Wavelength (nm)
Amplifier
Parameter
Input Offset Voltage
Input Bias Current
Unity Gain Bandwidth
Supply Current
Input Noise Voltage
Input Noise Current
Conditions
Vo =0, Rs = 50Ω
Vo = 0
Value
100 (typ)
1 (typ)
2
1.1 (typ)
8
0.6
Units
μV
pA
MHz
mA
nV/√Hz
fA/√Hz
Vo = 0, no load
Rs = 20Ω, f = 1KHz
Rs = 20Ω, f = 1KHz
Amplifiers parameters quoted at
±5V
Semelab Plc reserves the right to change test conditions, parameter limits and package dimensions without notice. Information furnished by
Semelab is believed to be both accurate and reliable at the time of going to press. However Semelab assumes no responsibility for any errors or
omissions discovered in its use. Semelab encourages customers to verify that datasheets are current before placing orders
Document No: X
Issue: 1
SMPX140 Series of Hybrid Detectors
Mechanical Details
∅6.1mm
5.9mm
Aperture
9.1mm
8.9mm
25mm
25.0mm
Pin1
8.2mm
Pin2
∅8.2mm
Pin4
Pin3
High Profile TO5
Bottom View
N.B. all dimensions are nominal, Consult Semelab Plc. for tolerance information.
Connections:
Pin 1:
Pin 2:
Pin 3:
Pin 4:
Vref
OUT
Vcc+
Vcc-
(typically 0V)
(positive supply voltage)
(negative supply voltage)
Note: Max supply voltage:
±
8V
Options
Hybrid Photodiode Selection Table
Part Number
SMPX144
SMPX145
SMPX146
SMPX147
SMPX149
Photodiode Size (mm)
4x4
4x4
4x4
4x4
4x4
Filter
Standard Glass
BG18 Filter
RG850 Filter
U340 Filter
U400 Filter
Semelab Plc reserves the right to change test conditions, parameter limits and package dimensions without notice. Information furnished by
Semelab is believed to be both accurate and reliable at the time of going to press. However Semelab assumes no responsibility for any errors or
omissions discovered in its use. Semelab encourages customers to verify that datasheets are current before placing orders
Document No: X
Issue: 1
Discrete Device
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