Toshiba Releases Lens-Reduction Type CCD Linear Image Sensor with Low Random Noise That Helps Improve Image Quality in Devices Such as A3 Multifunction Printers
August 5, 2025
Toshiba Electronic Devices & Storage Corporation
KAWASAKI, Japan–Toshiba Electronic Devices & Storage Corporation ("Toshiba") has launched a lens-reduction type[1] CCD[2] linear image sensor “TCD2728DG” for A3 multifunction printers. Shipments start today. The sensor has 7,500 image sensing elements (pixels)[3] and supports A3 multifunction printers. It is also more effective at reducing random noise (NDσ)[4] than Toshiba’s current TCD2726DG.
Business offices are seeing a growing need for high-speed, high-resolution copying and scanning of large volumes of different kinds of documents. This is particularly true for A3 multifunction printers, where improving image quality has become an important issue, and NDσ in the signal has to be suppressed to enhance image quality.
TCD2728DG has lower output amplifier gain[5] than Toshiba’s current product, TCD2726DG, and reduces NDσ by approximately 40%[6]. This improvement enhances image quality in multifunction printers. The new CCD linear sensor achieves a data rate of 100 MHz (50 MHz×2 channels), enabling high-speed processing of large volumes of images. This makes it well-suited for line scan cameras used in inspection systems that require real-time decision-making.
Toshiba will continue to expand its product lineup to support scanning by multifunction printers and the sensing applications of inspection devices, and to meet growing demand for high-speed, high-resolution imaging and sensing technologies.
Notes:
[1] The method of reducing an image with optical lenses and projecting it onto a CCD or CMOS image sensor.
[2] CCD: Charge Coupled Device
[3] Number of pixels required to scan the short side (297mm) of A3 size at a resolution of 600 dpi.
(dpi (dots per inch): number of divisions per inch)
A3 size converted to inches: 297mm/25.4mm ≒ 11.7 inches
11.7×600=7,020 pixels ⇒ Allowing for margin, 7,500 pixels
[4] Irregular noise that affects the quality of the image.
[5] A circuit to adjust the amplification of the output signal. Amplification and noise are proportional.
[6] Comparison with Toshiba’s current product TCD2726DG. Values measured by Toshiba.
Applications
- A3 multifunction printers (resolution of 600 dpi)
- 7500-pixel line scan camera for various inspection systems (semiconductor inspection equipment, food sorting equipment, etc.)
Features
- Reduces random noise by approximately 40%[6]
- High-speed CCD linear image sensor: Data rate=100MHz (Master clock frequency 50MHz×2ch) (max)
- The built-in timing generator circuit[7] and CCD driver help facilitate system development
Note:
[7] Circuit for generating signals necessary to drive a linear image sensor.
Main Specifications
(Ta=25°C)
| Part number | TCD2728DG | |
|---|---|---|
| Power supply voltage (operating range) (V) | VAVDD,VDVDD,VCKDVDD: 3.1 to 3.5 V VDD10: 9.5 to 10.5 |
|
| Random noise NDσ (mV) | 1.9 | |
| Pixel size (μm) | 4.7×4.7 | |
| Number of image sensing elements | 7500 elements×3 lines | |
| Data rate | Max | 100MHz (50MHz×2ch) |
| Package | WDIP32 | |
| Others/Additional features | Timing generator circuit, CCD driver | |
Follow the link below for more on the new product.
TCD2728DG
Follow the link below for more on Toshiba’s linear image sensors.
Linear Image Sensors
Customer Inquiries:
Analog Device Sales & Marketing Dept.
Tel: +81-44-548-2219
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