S2684-254 uses an interference filter as its window to provide high sensitivity only to monochromatic light. The spectral response width is as

narrow as 10 nm (FWHM), allowing accurate photometry without being adversely influenced by stray light. As the type No. implies, S2684-254

has a peak sensitivity wavelength at 254 nm. However, variant types are also available with different peak sensitivity wavelengths such as 340,

405, 500, 520, 560, 650 and 700 nm.

Features

l Monochromatic light detection with high sensitivity

l Low dark current

Applications

l Analytical instruments

l UV monitor (mercury lamp monitor, etc.)

PHOTODIODE

Si photodiode

Photodiode with interference filter for monochromatic light (254 nm) detection

S2684-254

s Absolute maximum ratings

Parameter

Symbol

Value

Unit

Reverse voltage

5

V

Operating temperature

Topr

-10 to +60

°C

Storage temperature

Tstg

-20 to +70

°C

s Electrical and optical characteristics (Ta=25

°C)

Parameter

Symbol

Condition

Min.

Typ.

Max.

Unit

Peak sensitivity wavelength

λp

252

254

256

nm

Spectral response half-width

FWHM

8

10

12

nm

Photo sensitivity

S

λ=λp

-0.02

-

A/W

Dark current

-

-

25

pA

-

1.12

-

times/°C

Rise time

tr

Ω

-

1

-

µs

Terminal capacitance

Ct

-

380

-

pF

Shunt resistance

Rsh

0.4

5

-

G

Ω

Noise equivalent power

NEP

λ=λp

-

9.1

W/Hz

1/2

1