WM8199SCDS/V - 3-Channel 16-Bit 20MSPS AFE | Cirrus Logic
料号： WM8199SCDS/V ✓ 量产中WM8199SCDS/V 概述
An analog front end, or AFE, is an interface circuit that conditions analog sensor signals before digitization. Its role in the signal chain is to prepare incoming CCD or contact image sensor voltages for accurate conversion by an ADC. Within the broader hierarchy, an AFE is a data-acquisition IC, an interface IC, and ultimately a semiconductor designed to bridge specialized analog sensors with digital image-processing systems.
The WM8199SCDS/V provides three signal-processing channels, 16-bit digitization, and operation to 20MSPS. These headline specifications make it suitable for multichannel scanner, contact image sensor, and industrial imaging systems that require synchronized conversion of narrow pixel signals. Its three-channel architecture can reduce the number of separate front-end devices needed when a sensor exposes multiple outputs.
The 20MSPS maximum sample rate establishes the upper conversion-speed limit for each supported channel. It determines how rapidly successive pixel positions can be processed and is important when matching the AFE to sensor timing, clocking, and downstream image throughput. The 16-bit digital output provides substantially greater numerical resolution than lower-bit converters, supporting precise capture of gradual signal changes.
The WM8199SCDS/V is specifically associated with CCD sensors and contact image sensors rather than general-purpose audio or instrumentation front ends. Typical application areas include document scanners, flatbed scanners, contact image sensor modules, inspection equipment, and other imaging systems that require three analog inputs, 16-bit conversion, and a maximum sampling rate of 20MSPS.
System design must preserve the relationship between sensor pixel rate, analog input bandwidth, clocking, and the downstream image processor. The AFE should be placed close to the sensor outputs, with a low-noise and appropriately terminated reference arrangement. Power distribution and grounding require care because converter performance is influenced by supply noise and signal return paths.
This product page combines the WM8199SCDS/V technical identity, package information, application guidance, sourcing details, and cross-reference analysis in a format intended to accelerate component selection and board-level implementation. It also emphasizes the distinction between a true pin-compatible replacement and a merely similar imaging converter.
直接替换替代料： WM8199SCDS/V ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
WM8199SCDS/RV
✅ 直接替换📋 参考替代料（不在目录中）
WM8199SCDS/V 最大额定值与电气特性
| Device Type | 3-channel analog front end and digitizer |
| 分辨率 | 16 bit |
| Maximum Sampling Rate | 20MSPS |
| Number of Channels | 3 channels |
| Supported Sensor Types | CCD sensors and contact image sensors |
| Power Dissipation | 358 mW |
| 封装 | 28-pin SSOP |
| 安装类型 | Surface mount |
| Analog Input Count | 3 inputs |
| Output Resolution | 16 bit |
| Pixel Sample Rate | Up to 20MSPS |
| Input Signal Type | Analog CCD or contact image sensor output |
WM8199SCDS/V 28-pin ssop 引脚配置指南
WM8199SCDS/V（28-pin ssop 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： WM8199SCDS/V.
请参阅 数据手册 以查看完整引脚配置。
典型应用
WM8199SCDS/V 适用于 6 应用s: Contact Image Sensor Scanner, CCD Document Scanner, Flatbed Image Scanner, Industrial Contact Image Sensor, Machine Vision Inspection System, Compact Line-Scan Imaging Module.
Contact Image Sensor Scanner
WM8199SCDS/V fits a contact image sensor scanner because it digitizes three analog sensor outputs with 16-bit resolution at up to 20MSPS. The device can serve as the interface between the sensor's analog pixel signals and a downstream image processor, reducing the need for separate channel-specific front ends. Board design should preserve short, low-noise signal paths from the sensor to the AFE and maintain consistent grounding among the three channels.
推荐
CCD Document Scanner
WM8199SCDS/V is appropriate for a CCD document scanner requiring three conditioned, digitally represented image channels at a maximum rate of 20MSPS. Its 16-bit conversion provides high numerical resolution for grayscale imaging, while the three-channel structure supports scanners with multiple sensor outputs. The sensor clock, AFE sampling clock, data-capture timing, and power rails must be synchronized to avoid pixel-to-pixel timing errors.
推荐
Flatbed Image Scanner
A flatbed scanner can use WM8199SCDS/V when its CCD array produces three analog outputs and the scan engine samples pixels at up to 20MSPS. The device's specialized CCD front-end architecture avoids relying on a general-purpose audio converter for image-sensor signal handling. Placement near the sensor reduces trace susceptibility and helps maintain consistent conversion timing as the scan carriage advances.
推荐
Industrial Contact Image Sensor
WM8199SCDS/V supports industrial inspection modules built around contact image sensors with three analog outputs. Its 20MSPS maximum pixel rate accommodates moderate-speed scanning, while 16-bit digitization preserves detail in subtle intensity variations. Industrial implementations should pay particular attention to sensor-level noise, analog grounding, reference stability, and isolation from motors or switching supplies that could disturb the image signal.
推荐
Machine Vision Inspection System
WM8199SCDS/V can serve as the image acquisition front end in a compact machine-vision system using a three-output CCD or contact image sensor. The 16-bit resolution and 20MSPS capability provide a defined baseline for moderate-speed inspection, although axis-motion timing and sensor integration must be coordinated with conversion timing. A local low-noise reference and careful layer stack-up are important when small inspection features require repeatable grayscale measurements.
推荐
Compact Line-Scan Imaging Module
WM8199SCDS/V is suitable for a compact line-scan imaging module whose sensor provides three analog channels and operates at a pixel rate below 20MSPS. Its three-channel architecture consolidates related sensor outputs, while the 16-bit conversion supports detailed line data. The imaging controller must derive the AFE and sensor clocks from a stable timing source and capture each line without dropping samples during movement.
推荐
推荐产品汇总
工程参考数据： WM8199SCDS/V ——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 | WM8199SCDS/RV |
|---|---|---|
| Device Type | 3-channel analog front end and digitizer | 20MSPS, 16-bit CCD digitizer |
| Brand | Cirrus Logic | Cirrus Logic |
| Package | 28-pin SSOP | 28-terminal SSOP |
| Channel Count | 3 channels | 3 channels |
| Resolution | 16 bit | 16 bit |
| Maximum Sampling Rate | 20MSPS | 20MSPS |
| Sensor Compatibility | CCD sensors and contact image sensors | CCD digitizer |
| Mounting Type | Surface mount | Surface mount |
| Ordering Suffix | /V | /RV |
关键差异点
- Purpose-built three-channel CCD digitization （对比 WM8199SCDS/RV)
- 20MSPS maximum image-sensor sampling （对比 WM8199SCDS/RV)
- Contact image sensor support （对比 WM8199SCDS/RV)
设计说明
Place the WM8199SCDS/V close to the CCD or contact image sensor outputs, and route each analog channel as a short, continuous trace. Avoid sharing sensitive pixel-return paths with switching or motor-current returns. Use a solid ground plane and provide quiet, decoupled supply connections at the device pins. This arrangement is especially important because the 16-bit conversion resolution can be undermined by pickup from adjacent high-current or high-speed digital circuits.
Synchronize the sensor transfer timing, WM8199SCDS/V sampling clock, and downstream data capture so each analog sample corresponds to the correct pixel position. Check acquisition, conversion, and output latency using the manufacturer's timing diagrams. At 20MSPS, there are 50 ns between maximum-rate samples, so clock distribution and data-interface timing margin must remain consistent across all three channels.
Estimated: using the listed 358 mW power dissipation as the device input, a 28-pin SSOP without a heatsink requires adequate PCB copper to limit junction-temperature rise. At 40°C ambient, each 1°C junction rise above the ambient reference corresponds to a 0.358 W thermal budget before allowing margin for nearby circuitry. Use the manufacturer thermal-resistance and maximum-junction-temperature limits for the final calculation.
Do not treat WM8199SCDS/RV as an automatic substitute until the ordering suffix, package drawing, pin functions, temperature grade, and reel configuration have been compared. The two names belong to the same specialized CCD digitizer family, but suffix conventions can alter qualification or packing. Also avoid treating the AFE as a generic ADC: its 16-bit, three-channel, 20MSPS operation is intended for CCD and contact image sensor signal chains.
合规信息
The WM8199SCDS/V is an imaging AFE rather than an automotive-qualified device. No specific RoHS, REACH, lead-free, halogen-free, or conflict-minerals declaration was identified.