InGaAs linear image sensors

Near infrared image sensors (0.9 to 1.67 μm /

2.55 μm)

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G9211 to G9214 series

G9205 to G9208 series

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The G9211 to G9214/G9205 to G9208 series InGaAs linear image sensors are specifically designed for near infrared multichannel

spectrophotometry. These linear image sensors consist of an InGaAs photodiode array, a charge amplifier array, an offset com-

pensation circuit, a shift register and a timing generator formed on a CMOS chip. The charge amplifier array is made up of CMOS

transistors connected to each pixel of the InGaAs photodiode array. Signals from each pixel are read out in charge integration

mode to achieve high sensitivity and stable operation in the near infrared spectral range. The package is hermetically sealed for

high reliability.

Signal processing circuits on the CMOS chip can be selected from two conversion efficiencies (CE) by external voltage. The image

sensor operates over a wide dynamic range when CE=16 nV/e- and delivers high gain when CE=320 nV/e-.

High resolution: 25 μm pitch (512 ch)

Low cross-talk

256 ch: 1 video line

512 ch: 2 video lines

Low noise and low dark current

Two selectable conversion efficiencies

Anti-saturation circuit

Features

Applications

Related products

Near infrared multichannel spectrophotometry

InGaAs multichannel detector head C8061-01, C8062-01

Radiation thermometry

Multichannel detector head controller C7557

Non-destructive inspection

Offset compensation circuit

Wide dynamic range

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1: A major source of noise in charge amplifiers is the reset noise generated when the integration capacitance is reset. A CDS (correlated

double sampling) circuit greatly reduces this reset noise by holding the signal immediately after reset to find the noise differential.

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2: Different signal timings must be properly set in order to operate a shift register. In conventional image sensor operation, external PLDs

(programmable logic device) are used to input the required timing signals. However, the G9211 to G9214/G9205 to G9208 series image

sensors internally generate all timing signals on the CMOS chip just by supplying CLK and RESET pulses. This makes it simple to set the

timings.