Features

Sensor has X-ray monitoring photodiode

Compactness

5.1 mm thickness excluding I/O connector part

High dynamic range: 12 bit

Long-term stability

For use under 100,000 shots

(60 kVp, 30 mR X-ray irradiation)

Resolution: 20 Lp/mm

1700 (H) × 1200 (V) pixel format

Pixel size: 20 × 20 µm

Coupled with FOS for X-ray imaging

100 % fill factor

Low dark signal

Low readout noise

MPP operation

AC/DC X-ray source adapted

Applications

General X-ray imaging

Non-destructive inspection

Intra-oral X-ray imaging in dental diagnosis

IMAGE SENSOR

CCD area image sensor

Front-illuminated FFT-CCDs for X-ray imaging

S8984, S8985-02

S8984 is an FFT-CCD image sensor ideal for intra-oral X-ray imaging in dental diagnosis. S8984 has about 2 mega (1700 × 1200) pixels each of

which is 20 × 20 µm. The fiber optic plate (FOP) used as an input window is as thin as 1.5 mm but highly resistant to X-ray irradiation, making

S8984 very reliable even over a long-term operation. The scintillator coated on the FOP is optimized to have high X-ray sensitivity and high

resolution (20 Lp/mm).

S8985-02 is an easy-to-use X-ray imaging module using S8984, with added functions such as a cable assembly and X-ray trigger circuit. S8985-

02 is pin compatible with S8981-02 (number of pixels is increased). S8985-02 is advanced type of S8985 and adapted both AC and DC X-ray

sources.

■ Selection guide

Type No. Cooling

Number of

total pixels

Number of

active pixels

Active area

[mm (H) × mm (V)]

S8984

S8985-02

Non-cooled 1708 × 1202 1700 × 1200 34 × 24

■ General ratings

Parameter S8984 S8985-02

CCD structure Full frame transfer

Fill factor 100 %

Number of active pixels 1700 (H) × 1200 (V)

Pixel size 20 (H) × 20 (V) µm

Active area 34 (H) × 24 (V) mm

Vertical clock phase 2 phase

Horizontal clock phase 2 phase

Output circuit Emitter follower without load resistance

Dimensional outline 39.5 (H) × 27.5 (V) mm 42.6 (H) × 30.6 (V) mm

Reliability 100,000 shots at 60 kVp, 30 m Roentgen

Window Scintillator on 1.5 mm FOP

Other MPP mode (low dark current operation), module (S8985-02)

CCD area image sensor

S8984, S8985-02

■ Absolute maximum ratings (Ta=25 °C)

Parameter Symbol Min. Typ. Max. Unit

Storage temperature Tstg -20 - +70 °C

Operating temperature Topr 0 - +40 °C

OD voltage V

-0.5 - +20 V

RD voltage V

-0.5 - +18 V

SG voltage V

-15 - +15 V

OG voltage V

-15 - +15 V

RG voltage V

-15 - +15 V

TG voltage V

-15 - +15 V

Vertical clock voltage V

P1V

, V

P2V

-15 - +15 V

Horizontal clock voltage V

P1H

, V

P2H

-15 - +15 V

Vcc voltage Vcc 0 - +7 V

■ Operating conditions (MPP mode, Ta=25 °C)

Parameter Symbol Min. Typ. Max. Unit

Output transistor drain voltage V

12 15 - V

Reset drain voltage V

12 13 14 V

Output gate voltage V

-0.5 2 5 V

Substrate voltage Vss - 0 - V

High V

P1VH

, V

P2VH

0 3 6 V

Vertical shift register

clock voltage

Low V

P1VL

, V

P2VL

-9 -8 -7 V

High V

P1HH

, V

P2HH

036V

Horizontal shift register

clock voltage

Low V

P1HL

, V

P2HL

-9 -8 -7 V

High Vs

0 3 6 V

Summing gate voltage

Low Vs

-9 -8 -7 V

High V

RGH

036V

Reset gate voltage

Low V

RGL

-9 -8 -7 V

High V

TGH

0 3 6 V

Transfer gate voltage

Low V

TGL

-9 -8 -7 V

+5 V power supply voltage Vcc 4.75 5 5.25 V

■ Electrical characteristics (Ta=25 °C)

Parameter Symbol Remark Min. Typ. Max. Unit

Signal output frequency fc *

-15MHz

Vertical shift register capacitance C

v, C

v - 70,000 - pF

S8984 - 400 -

Horizontal shift

S8985-02

P1H

, C

P2H

- 600 -

S8984 - 20 -

Summing gate capacitance

S8985-02

- 220 -

S8984 - 20 -

Reset gate capacitance

S8985-02

- 220 -

S8984 - 250 -

Transfer gate capacitance

S8985-02

- 450 -

Charge transfer efficiency CTE *

0.99995 0.99998 - -

DC output level V

ut *

5 8 11 V

Output impedance Zo *

- 500 -

Ω

Power dissipation P *

- 75 - mW

S8984 - 1 -

+5 V power supply current

S8985-02

Icc

-2-

*1: S8984 only. In case of S8985-02, maximum frequency is strongly depend on peripheral circuit and cable length.

*2: Measured at half of the full well capacity. CTE is defined per pixel.

*3: V

=15 V

*4: Power dissipation of the on-chip amplifier.

CCD area image sensor

S8984, S8985-02

......

VS1 VS2 VS3 VS4

VS1199

VS1200

VS1201

VS1202

1696

1697

1698

1699

1700

11991198 1200

S1699

S1700

S1701

S1702

S1703

S1704

......

X-RAY IRRADIATION

MONITORING PHOTODIODE

P1V’

P2V’

TG’

RG’

SG’

P1H’

P2H’

■ Electrical and optical characteristics (Ta=25 °C, unless otherwise noted, V

=15 V)

Parameter Symbol Remark Min. Typ. Max. Unit

Vertical 100 200 -

Horizontal - 300 -Full well capacity

Summing

- 600 -

CCD node sensitivity Sv *

1.0 1.4 - µV/e

Dark current (MPP mode) DS *

- 250 2,500 e

/pixel/s

Readout noise Nr *

- 60 - e

rms

Dynamic range DR *

- 3,333 - -

X-ray response non-uniformity XRNU *

- ±10 ±30 %

White spots - - 20

Point

defects *

Black spots - - 20

Cluster defects *

--3

Blemish *

Column defects

--1

X-ray resolution

∆

15 20 - Lp/mm

*5: V

=15 V, R

(load resistance of emitter follower)=1 k

Ω

*6: Dark signal doubles for every 5 to 7 °C.

*7: -40 °C, operating frequency is 1 MHz.

*8: Dynamic range = Full well capacity / Readout noise

*9: X-ray irradiation of 60 kVp, measured at half of the full well capacity.

*10: XRNU (%) = Noise / Signal × 100

Noise: Fixed pattern noise (peak to peak)

In the range that excludes 5 pixels from edges to the center at every position.

*11: Refer to “Characteristics and use of FFT-CCD area image sensor” of technical information.

*12: White spots > 10 times of Max. Dark signal (2500 e

/pixel/s).

Black spots > 50 % reduction in response relative to adjacent pixels, measured at half of the full well capacity.

*13: continuous 2 to 9 point defects.

*14: continuous > 10 point defects.

■ Device structure

KMPDC0220EA

■ Pixel format

←

Left Horizontal Direction

→

Right

Blank

Optical

black

Isolation Effective Isolation

Optical

black

Blank

2 2 1 1700 1 0 2

Top

←

Vertical direction

→

Bottom

Isolation Effective Isolation

1 1200 1

Part #	898-5
Description
Category	MICROCIRCUITS
Availability	In Stock
Qty	3

898-5

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Technical Document