WM8253SCDS/V

Overview

The WM8253SCDS/V is a single-channel 16-bit analogue front-end and digitiser IC designed for CCD and CIS sensors. It processes signals at pixel sample rates up to 6MSPS, featuring Reset Level Clamping (RLC), Correlated Double Sampling (CDS), an 8-bit Programmable Gain Amplifier (PGA), and an 8-bit offset DAC. The device outputs 16-bit data in a 4-bit wide multiplexed format via pins OP A-D. It operates on a 3.3V analogue supply and a 2.5V–3.3V digital I/O supply, consuming approximately 132mW. The component is housed in a 20-lead SSOP package.

Feature Summary

• 16-bit ADC with 6MSPS maximum conversion rate
• Integrated signal processing: RLC, CDS, 8-bit PGA, and 8-bit offset DAC
• Supports line-by-line colour processing with independent RGB gain/offset registers
• 4-bit wide multiplexed digital output interface
• Internally generated voltage references and 4-bit RLC DAC

Applications

• Flatbed scanners
• Sheetfeed scanners
• USB compatible scanners
• Multi-function peripherals
• High-performance CCD sensor interfaces

Procurement Notes

Verify the ordering suffix against the specific moisture sensitivity level and packaging requirement. The SCDS/V variant indicates a 20-lead SSOP package supplied in drybagged form with MSL3 classification. Confirm that the lead-free status aligns with assembly specifications. Ensure the operating temperature range of 0°C to 70°C meets the target application environment.

Selection Notes

Select this component for applications requiring a single-channel high-speed digitisation path for CCD or CIS sensors. The internal multiplexers allow efficient line-by-line colour processing without external switching components. Verify that the system clock can provide an MCLK up to 36MHz and that the digital interface supports the required 4-bit wide data bus timing. Ensure power supplies are stable within the 2.97V–3.63V range for AVDD/DVDD1.

Part Context

The WM8253 is manufactured by Wolfson Microelectronics plc, which was acquired by Cirrus Logic. This production data document (Rev 4.1, August 2011) confirms the device's specifications as a dedicated analogue front-end for imaging sensors. The part number WM8253SCDS/V specifically denotes the commercial temperature range and standard tube/drybag packaging.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should verify pin compatibility and register map equivalence if considering alternative single-channel 16-bit CIS/CCD AFEs from other manufacturers.