Datasheet > G12242-0707W_15

G12242-0707W_15

更新时间： 2024-01-18 07:01:18

品牌	Logo	应用领域
HAMAMATSU		/
页数	文件大小	规格书
10页	274K
描述
Near infrared area image sensor with 128 x128 pixels

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G12242-0707W_15 数据手册

InGaAs area image sensor

G12242-0707W

Near infrared area image sensor with

128 × 128 pixels

The G12242-0707W has a hybrid structure consisting of a CMOS readout circuit (ROIC: readout integrated circuit) and

back-illuminated InGaAs photodiodes. Each pixel is made up of an InGaAs photodiode and a ROIC electrically connected by

indium bumps. The timing generator in the ROIC provides an analog video output and AD-TRIG output which are obtained

by just supplying a master clock (MCLK) and master start pulse (MSP) as digital inputs from external sources.

The G12242-0707W has 128 × 128 pixels arrayed at a 20 μm pitch and their signals are read out from a video line. Light

incident on the InGaAs photodiodes is converted into electrical signals which are then input to the ROIC through indium

pumps. Electrical signals in the ROIC are converted into voltage signals by charge ampliﬁers and then sequentially output

from the video line by the shift register. The G12242-0707W is hermetically sealed in a TO-8 package together with a two-

stage thermoelectric cooler to deliver low-cost yet highly stable operation.

Features

Applications

Spectral response range: 0.95 to 1.7 μm

Thermal image monitor

Laser beam proﬁler

High sensitivity: 1 μV/e

Frame rate: 258 fps max.

Near infrared image detection

Foreign object detection

Global shutter mode and rolling shutter mode switchable

Simple operation (built-in timing generator)

Two-stage TE-cooled

Low cost

Block diagram

The G12242-0707W operates in either global shutter mode or rolling shut-

ter mode which are switchable. The operation of the readout circuit in each

mode is described below.

Start

Rolling shutter mode

The sample-and-hold switches in all pixels are always ON. Pixel scanning

starts from the top left point as shown in the figure on the right.

The vertical shift register scans from top to bottom while sequentially se-

lecting each row. The following operations to are performed on each

pixel of the selected row.

128 × 128 pixels

Transfers the integrated optical signal information to the signal processing

circuit as a signal voltage, and samples and holds the signal voltage.

Resets each pixel after having transferred the signal, transfers the reset

signal voltage to the signal processing circuit, and samples and holds the

reset signal voltage.

End

The horizontal shift register performs a sequential scan to output the

signal voltage and reset signal voltage as serial data. The offset voltage

in each pixel can be eliminated by ﬁnding a difference between the signal

voltage and the reset signal voltage with a circuit outside the sensor.

Signal processing circuit

Horizontal shift register

VIDEO

(signal voltage)

After the above operations to are complete, the reset switch for each

pixel on the selected row turns off and signal integration begins. At the

same time, the vertical shift register shifts by one row to select the next

row and the operations to are repeated.

VIDEO

(reset voltage)

KMIRC0068EA

After the vertical shift register advances to the 128th row, the master start

pulse (MSP), which is a frame scan signal, changes from low (0 V) to high

(5 V), and the next frame scan begins when the MCLK goes low. The signal

integration time is the time period from right after the end of the n-th row

scan to the timing for holding the optical signal information integrated on

the n-th row in the next frame.

www.hamamatsu.com

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