P2748_15 Datasheet, PDF (1/4 Pages) Hamamatsu Corporation – MCT photoconductive detectors

MCT photoconductive detectors
P2748/P5274 series
Dewar type detector with high sensitivity and
high-speed response in long wavelength range
Features
Choice of spectral response range (up to 25 μm)
The band gap can be adjusted by controlling the composition
ratio of HgTe and CdTe. Utilizing this fact, various types are
available in different spectral characteristics.
Photoconductive element that decreases its resistance
by input of infrared light
Custom devices available
Custom devices not listed in this catalog are also available
with different spectral response, active area sizes and num-
ber of elements.
Applications
FTIR
Infrared spectrophotometers
Thermal imaging
Remote sensing
CO2 laser detection
Options
Valve operator
A3515
Amplifiers for dewar type MCT photoconductive detector
C5185-02
Structure / Absolute maximum ratings
Type no.
Dimensional
outline/
Window
material
Package
Cooling
Photosensitive
area
(mm)
Nitrogen
hold time
Min.
tN²
(h)
Absolute maximum ratings
Allowable Operating Storage
bias temperature temperature
current
Topr
Tstg
(mA)
(°C)
(°C)
P2748-40
(1)/ZnS Side-on type metal dewar
1×1
40
P2748-41
P2748-42
(2)/ZnS Head-on type metal dewar
1×1
(1)/ZnS
Liquid nitrogen 0.25 × 0.25 12*¹
40
20
-40 to +60 -55 to +60
P5274
(1)/ZnSe Side-on type metal dewar
1×1
40
P5274-01
(1)/KRS-5
1×1
40
*1: Value specified at the time of shipment. This will shorten over time. Re-evacuation every 1.5 or 2 years is recommended.
Note: Exceeding the absolute maximum ratings even momentarily may cause a drop in product quality. Always be sure to use the
product within the absolute maximum ratings.
Electrical and optical characteristics (Typ. unless otherwise noted)
Type no.
Measurement
condition
Element
temperature
Td
Peak
sensitivity
wavelength
λp
Cutoff
wavelength
λc
Photo-
sensitivity*²
S
λ=λp
D*
(500, 1200, 1)
Min.
Typ.
Noise
D*
(λp, 1200, 1)
equivalent
power
NEP
Rise time
tr
0 to 63%
Dark
resistance
Rd
λ=λp
P2748-40
P2748-41
P2748-42
P5274
P5274-01
(°C) (μm) (μm)
(V/W) (cm · Hz^1/2/W) (cm · Hz^1/2/W) (cm · Hz^1/2/W) (W/Hz^1/2) (μs)
(Ω)
1000
2.5 × 10^-12
12
14
1000
1 × 10¹⁰
2 × 10¹⁰ 4.0 × 10¹⁰ 2.5 × 10^-12 0.6
40
-196
10000
6.3 × 10^-12
14
17
500
2 × 10⁹
1 × 10¹⁰ 1.5 × 10¹⁰ 6.7 × 10^-12 0.6
30
17
22
250
1 × 10⁹
5 × 10⁹ 1.0 × 10¹⁰ 1.0 × 10^-11 0.4
100
*2: Photosensitivity changes with the bias current. The values in the above table are measured with the optimum bias current.
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