WM8215CSEFL - 3-Channel 10-Bit 60MSPS CCD/CIS AFE | Cirrus Logic
料号： WM8215CSEFL ✓ 量产中WM8215CSEFL 概述
An analog front end for image digitisation is the circuit block that sits directly between a photosensitive sensor and the digital image processor. CCD and CIS sensors output small, correlated-double-sampling (CDS) dependent analog charges that must be conditioned, clamped, sampled and converted to digital words with matched timing across multiple channels. The AFE therefore combines programmable gain, offset correction, black-level clamping, CDS sampling and a multi-channel ADC pipeline in one integrated circuit, forming part of the broader signal-chain hierarchy: sensor -> AFE -> ADC -> image processor -> system.
Key features of the WM8215 include three independent 10-bit conversion channels rated at 60 MSPS, a total power dissipation of around 400 mW, and support for both CCD and CIS sensor architectures. The part is fabricated in CMOS, which keeps quiescent consumption low and supports dense multi-channel integration. Wolfson Microelectronics, the original designer, was acquired by Cirrus Logic, so datasheets may appear under either brand name.
Architecturally, the WM8215 uses a pipelined 10-bit ADC per channel preceded by input conditioning stages, allowing each colour channel of a linear sensor array to be digitised simultaneously. Simultaneous sampling eliminates inter-channel skew artefacts such as colour fringing in line-scan imaging, which sequential multiplexed converters cannot avoid.
Typical applications include document scanners and multi-function printers with CIS arrays, industrial line-scan inspection cameras, machine-vision systems for surface inspection, and scientific or medical linear CCD readout chains where three matched channels map naturally to RGB or multi-tap sensor outputs.
A key design consideration is signal integrity: keep the analog input traces short, guard them with ground, and follow the manufacturer datasheet for reference-decoupling and CDS timing, since jitter or noise on the sampling clock converts directly into image fixed-pattern noise. Thermal dissipation of 400 mW should be managed with the QFN exposed pad soldered to a ground pour.
This page synthesises distributor availability, package and application data, and practical design notes not found in the manufacturer datasheet, and it is verified and refreshed against distributor listings.
直接替换替代料： WM8215CSEFL ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
WM8215CSEFL/R
✅ 直接替换📋 参考替代料（不在目录中）
WM8215CSEFL 最大额定值与电气特性
| Product Type | Analog Front End (AFE) for CCD/CIS image sensors |
| Number of Channels | 3 |
| 分辨率 | 10 bit |
| 采样率 | 60 MSPS |
| Power Dissipation | 400 mW |
| Sensor Interface | CCD / CIS |
| 功能 | Analog Circuit, 1 Func |
| Process Technology | CMOS |
| 封装 | 32-QFN (5x5 mm), PQCC32 |
| 安装类型 | Surface Mount |
WM8215CSEFL 32-qfn (5x5 mm), pqcc32 引脚配置指南
WM8215CSEFL（32-qfn (5x5 mm), pqcc32 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： WM8215CSEFL.
请参阅 数据手册 以查看完整引脚配置。
典型应用
WM8215CSEFL 适用于 6 应用s: Document Scanners and Multi-Function Printers, Industrial Line-Scan Machine Vision, CCD Readout for Scientific Imaging, Barcode and OCR Capture Modules, Medical and Lab Diagnostic Linear Arrays, Kiosk and Retail Scanning Hardware.
Document Scanners and Multi-Function Printers
Contact image sensor (CIS) arrays in document scanners and MFPs output three analog colour channels that must be digitised simultaneously to avoid colour registration errors. The WM8215CSEFL's three 10-bit converters running at 60 MSPS digitise the RGB outputs in parallel, supporting the high line rates demanded by office-speed scanning - for example, a 60 MSPS channel comfortably serves A4 scanners at hundreds of lines per second. Its 400 mW dissipation keeps the thermal load inside compact scanner housings acceptable, and the CMOS process yields a small 32-QFN footprint that fits on dense main-board layouts. The sensor-specific conditioning in the AFE - black-level clamping and offset correction - removes the dark-level drift of CIS LEDs, which would otherwise appear as banding in scanned images.
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Industrial Line-Scan Machine Vision
Industrial inspection systems - surface-defect detection, print verification, web monitoring - use linear CCD or CIS sensors scanned at high line rates. The WM8215CSEFL fits because its three simultaneous 60 MSPS channels match the RGB or multi-tap outputs of colour line-scan sensors, eliminating the channel-to-channel skew that would smear defects across colour planes. At 10-bit resolution the converter preserves sufficient grey-level separation for subtle defect classification, and the ~400 mW consumption suits the sealed, fanless enclosures typical of factory-floor cameras. Designers should route the 60 MSPS sampling clock with low jitter, since clock noise converts directly into fixed-pattern noise along the scan direction, and follow the manufacturer datasheet reference decoupling to keep the conversion accuracy stable across long production runs.
推荐
CCD Readout for Scientific Imaging
Laboratory and instrumentation linear CCDs - spectrometers, bar-code capture, positional sensors - benefit from the WM8215CSEFL's integrated correlated-double-sampling conditioning, which suppresses kTC and 1/f noise at the sensor output before conversion. The three matched 10-bit channels allow a three-tap CCD to be read out with channel gain and offset matched in silicon, improving flat-field accuracy over discrete multi-chip solutions. The 400 mW total dissipation eases thermal design in sealed instrument enclosures where drift shifts the dark baseline; soldering the QFN exposed pad to a ground pour keeps the junction temperature low and stable. Because the AFE and conversion stages share one die, the design avoids inter-chip analog trace routing, a common noise source in custom CCD readout boards.
推荐
Barcode and OCR Capture Modules
Embedded barcode readers and OCR capture heads based on CIS arrays need compact, low-power, high-speed analog digitisation. The WM8215CSEFL's three 10-bit 60 MSPS channels digitise colour CIS output at line rates fast enough for moving-object capture on conveyor lines, while the 32-QFN (5x5 mm) footprint fits the tight mechanical envelope of a read head. Its ~400 mW power draw is compatible with battery-backed or PoE-powered portable scanning terminals. The AFE's black-level clamp tracks the output drift of CIS LED illumination as it warms up, keeping threshold decoding reliable over the duty cycle. Place the AFE physically adjacent to the sensor flex connector to minimise analog trace length, and decouple the reference per the manufacturer datasheet to prevent illumination ripple from modulating conversion results.
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Medical and Lab Diagnostic Linear Arrays
Medical and laboratory devices that use linear CCD/CIS arrays - slide scanners, dental panoramic sensors, microplate readers - require clean, repeatable digitisation of small sensor signals. The WM8215CSEFL's integrated CDS input conditioning reduces low-frequency noise before the 10-bit conversion, improving the reproducibility of grey-level measurements across repeated scans. Its 400 mW consumption and 32-QFN package suit portable diagnostic units where battery life and board area are constrained. The three matched channels support RGB or multi-spectral arrays used in tissue and sample imaging. Designers should power the analog section from a low-noise regulator and follow the manufacturer datasheet layout guidance, because in diagnostic imaging a 1-LSB offset error is directly visible as a diagnostic artefact.
推荐
Kiosk and Retail Scanning Hardware
Self-service kiosks, price checkers and point-of-sale scanning modules embed CIS-based capture heads that run continuously. The WM8215CSEFL serves these designs with three 10-bit channels at 60 MSPS, giving the line rate needed for instantaneous capture while the ~400 mW dissipation and CMOS construction limit heat build-up inside sealed kiosk enclosures operating 24/7. Its 32-QFN (5x5 mm) package withstands the vibration of high-traffic retail installations once the exposed pad is soldered to the ground plane. The AFE's clamping and offset-correction stages compensate CIS illumination aging, keeping decode rates consistent over the product life. Keep the analog front end close to the sensor and route the 60 MSPS clock as a controlled-impedance trace per the manufacturer datasheet recommendations.
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推荐产品汇总
工程参考数据： WM8215CSEFL ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | WM8215CSEFL/R |
|---|---|---|
| Package | 32-QFN (5x5 mm) | 32-QFN (5x5 mm) - same |
| Brand | Cirrus Logic | Cirrus Logic |
| Number of Channels | 3 | 3 |
| Resolution | 10 bit | 10 bit |
| Sampling Rate | 60 MSPS | 60 MSPS |
| Power Dissipation | 400 mW | 400 mW |
| Sensor Interface | CCD / CIS | CCD / CIS |
| Packing Option | Tray / Tube | Tape & Reel |
关键差异点
- Integrated CCD/CIS-specific conditioning chain （对比 Generic multi-channel pipelined ADC)
- Three simultaneously sampled channels （对比 Multiplexed 3-input ADCs)
- Low 400 mW power in CMOS （对比 WM8215CSEFL/R (identical) / discrete multi-chip AFE solutions)
设计说明
The 60 MSPS sampling clock is the single most noise-critical signal in a WM8215CSEFL design. Clock jitter converts directly into aperture error, appearing as fixed-pattern noise along the scan direction of the image. Source the clock from a low-jitter crystal oscillator, distribute it through a dedicated low-skew buffer, and route it as a controlled-impedance trace physically separated from the three analog input traces and the voltage reference. Keep all three analog channel traces short and matched in length so channel gains and phase remain matched across the colour planes.
Estimated: with 400 mW dissipation in a 32-QFN (5x5 mm) package, thermal performance depends almost entirely on the exposed pad connection. Solder the underside pad to a ground copper pour with an array of thermal vias to inner and bottom layers; an unconnected exposed pad can raise the junction temperature substantially and destabilise the black-level reference. In sealed scanner housings, verify airflow or conduction path to the chassis, and keep neighbouring hot components such as illumination LED drivers physically separated from the AFE on the board.
Do not treat the WM8215CSEFL like a generic ADC: its CCD/CIS-specific functions (correlated double sampling, black-level clamp, offset correction) require the correct sampling timing sequence from the manufacturer datasheet. Skipping or mistiming the clamp phase leaves the dark-level baseline drifting with CIS LED warm-up, producing visible banding. Also confirm the exact ordering suffix before assembly - WM8215CSEFL (tray) and WM8215CSEFL/R (tape-and-reel) are electrically identical but packed differently, and mixing suffixes on automated lines without reel stock causes line downtime.
合规信息
Compliance status is not stated in the retrieved distributor listings. Verify RoHS/REACH status via the manufacturer product page or datasheet before design-in.
