WM8214SCDS/V - 16-Bit 3-Channel 40MSPS AFE | Cirrus Logic
MPN: WM8214SCDS/V ✓ ActiveWM8214SCDS/V Overview
An analogue front end is the signal-conditioning and conversion block that sits between an imaging sensor and a digital processor. It takes the weak, noisy analogue charge or voltage signal produced by a CCD or CIS sensor, applies gain, offset and timing control, and then performs the analogue-to-digital conversion that turns the sensor waveform into numeric pixel data. In the product hierarchy, an AFE is a data-acquisition IC, which is a subclass of mixed-signal and interface semiconductors used in imaging, instrumentation and industrial automation systems.
Key features of the WM8214SCDS/V include 16-bit conversion resolution, three parallel channels for multi-phase sensor timing, a maximum pixel sampling rate of 40 MSPS, a single 2.97 V to 3.63 V supply range shared by the analog and digital sections, and a compact 390 mW power dissipation in an industry-standard 28-SSOP footprint. The combination of three channels and 40 MSPS throughput allows one device to digitise the output of a three-output CCD or CIS sensor without external multiplexers or separate converter ICs.
The WM8214SCDS/V integrates the full imaging signal chain into a single package: analog conditioning, sampling, conversion and digital output in one device. Separate analog and digital supply pins allow a system architect to partition noisy digital return currents from the sensitive analog reference and signal planes, which is the standard technique used to reach the noise floor required for 16-bit resolution. Because the converter runs directly from the sensor clock, no external sample-and-hold stage or external ADC is required between the CCD output amplifiers and the digital back-end.
Typical applications include flatbed contact image sensor (CIS) scanner signal chains, line-scan CCD machine vision modules, copier and multi-function printer imaging engines, industrial inspection and optical metrology equipment, portable and handheld document scanners, and dedicated barcode or document imaging modules. The 40 MSPS sampling ceiling covers the pixel rates of mainstream office and industrial CIS strips, while the three-channel architecture matches typical three-phase or multi-output CCD timing schemes.
A key design consideration is supply partitioning and decoupling. Because the analog and digital sections use separate supply pins within the same package, route them on distinct planes and place the analog bypass capacitors directly at the analog supply pins to avoid shared-impedance coupling of switching noise into the signal path. The 28-SSOP body also limits total copper area, so keep the analog ground return path short and directly beneath the device.
This page consolidates device specifications, supply voltage and power limits, package and ordering information, drop-in alternatives from the same Cirrus Logic imaging AFE family, and practical PCB design notes into a single reference for engineers evaluating the WM8214SCDS/V for CCD and CIS imaging designs.
Drop-in alternatives for WM8214SCDS/V — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
WM8214SCDS/RV
✅ Drop-In📋 Reference alternative (not in catalog)
WM8214SCDS
✅ Drop-In📋 Reference alternative (not in catalog)
WM8216SCDS
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
WM8196SCDS
✅ Drop-In📋 Reference alternative (not in catalog)
WM8326
✅ Drop-In📋 Reference alternative (not in catalog)
WM8214SCDS/V Maximum Ratings & Electrical Characteristics
| Device Type | Analog Front End (AFE) / CCD Digitiser |
| Manufacturer | Cirrus Logic (formerly Wolfson Microelectronics) |
| Resolution | 16 bit |
| Number of Channels | 3 |
| Maximum Sampling Rate | 40 MSPS |
| Analog Supply Voltage | 2.97 V to 3.63 V |
| Digital Supply Voltage | 2.97 V to 3.63 V |
| Power Dissipation | 390 mW |
| Package | 28-SSOP (0.209 in, 5.30 mm body width) |
| Mounting Type | Surface Mount |
| Supported Sensor Type | CCD and Contact Image Sensor (CIS) analogue outputs |
| Ordering Code | WM8214SCDS/V (lead-free /V option) |
| Part Status | Active |
| Category | Data Acquisition - Analog Front End (AFE) |
WM8214SCDS/V 28-ssop (0.209 in, 5.30 mm body width) Pin Configuration Guide
Pin configuration for WM8214SCDS/V (28-ssop (0.209 in, 5.30 mm body width) package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for WM8214SCDS/V.
Refer to the datasheet for full pin configuration.
Typical Applications
WM8214SCDS/V is suitable for 6 applications: Flatbed Contact Image Sensor (CIS) Scanner Signal Chain, Line-Scan CCD Machine Vision Module, Copier and Multi-Function Printer Imaging Engine, Industrial Optical Inspection and Metrology, Portable and Handheld Document Scanner, Barcode and Document Imaging Subsystem.
Flatbed Contact Image Sensor (CIS) Scanner Signal Chain
The WM8214SCDS/V suits the analog front end of a flatbed scanner built around a contact image sensor strip, where a multi-output CIS produces several analogue phase signals that must be digitised continuously. Its three channels and 40 MSPS maximum sampling rate cover the pixel clock of mainstream office CIS strips, and the 16-bit resolution preserves grey-scale discrimination for text and photo reproduction. The device is placed directly after the sensor amplifier stage with 2.97 V to 3.63 V analog and digital rails, and the 390 mW dissipation is handled by the ground plane area around the 28-SSOP body. Because the analog and digital supply pins are separate, splitting them on distinct planes keeps switching return currents out of the sensor signal path, which is what makes the 16-bit noise floor achievable in a compact CIS module.
Recommended
Line-Scan CCD Machine Vision Module
In a line-scan machine vision camera, the CCD array reads out one image line at a time at high pixel clocks, and the digitiser must keep pace without adding latency or noise. The WM8214SCDS/V captures up to 40 MSPS across three channels, matching the multi-output timing of common progressive-scan CCD arrays, while the 16-bit conversion depth gives defect-detection algorithms enough grey-scale headroom for subtle contrast features. Placement is critical: keep the device on an uninterrupted ground pour, route sensor outputs differentially as short as possible, and separate the analog supply bypass network from digital supply distribution. At 390 mW in a 28-SSOP, thermal rise is modest but rises further if the module sits inside a sealed housing next to stepper motor drivers, so isolate the supply regulators from the digitiser area.
Recommended
Copier and Multi-Function Printer Imaging Engine
Office imaging engines digitise a CCD or CIS lamp array at sustained line rates while the machine also runs stepper motors, solenoids and switching power converters, making noise coupling the main design risk. The WM8214SCDS/V addresses this with 16-bit resolution, three channels and a 40 MSPS ceiling, enough for typical copy-speed pixel clocks, and with separate analog and digital supply pins that allow a strict analog/digital partition in a crowded board. Use separate ferrite beads or a small ferrite/ceramic network between the digital and analog rails, place the analog bypass capacitor at the device pin, and keep the switching converter loops physically distant from the 28-SSOP footprint. The 390 mW dissipation is easily handled with normal copper pour in the printer main board environment.
Recommended
Industrial Optical Inspection and Metrology
Optical inspection and dimensional metrology systems depend on repeatable grey-scale measurements rather than visual appearance, so the quantisation step and noise floor of the digitiser directly influence measurement uncertainty. The 16-bit resolution of the WM8214SCDS/V, combined with its three channels and 40 MSPS maximum sampling rate, allows one part to digitise a multi-output sensor synchronously to the illuminator and encoder reference. Because metrology front ends are sensitive to supply drift, run the analog rail from a low-noise regulator with dedicated filtering and keep the reference and sensor returns separate from the digital output and clock lines. The 28-SSOP body is small enough to sit close to the sensor connector, shortening the sensitive analog path, and the 390 mW dissipation is manageable with the copper area normally allocated in an instrumentation chassis.
Recommended
Portable and Handheld Document Scanner
A handheld document scanner imposes strict limits on board area, supply current and thermal budget because it runs from a battery and must stay comfortable to hold. The WM8214SCDS/V integrates three 16-bit channels and the digitiser into a single 28-SSOP package, replacing what would otherwise be separate analog conditioning and converter stages and reducing the analog path length between the CIS output and the converter input. With the analog and digital rails both specified from 2.97 V to 3.63 V, the part can run from a single 3.3 V rail with supply partitioning for noise control. The 390 mW dissipation is the dominant thermal contributor in a sealed handheld enclosure, so provide copper pour, keep the device away from the battery charger and any DC-DC converter, and consider a lower sample rate during preview mode to reduce average power.
Recommended
Barcode and Document Imaging Subsystem
Barcode readers and specialised document imaging modules digitise narrow or fast-moving line sensors where the converter must keep up with the transport speed and still resolve low-contrast print. The WM8214SCDS/V provides a 40 MSPS sampling ceiling and three independent channels at 16-bit resolution, which lets a module read a sensor line and a reference or illumination monitor channel together without slowing the transport. Place the converter close to the sensor header so the analog output traces stay short, terminate cleanly, and keep the digital outputs away from the analog input side of the board to avoid coupling through the shared supply pins. The 390 mW load is modest for a 28-SSOP in a plastic scanner body, and the small footprint leaves board area for the motor driver and the illumination regulator.
Recommended
Recommended Products Summary
Engineering reference data for WM8214SCDS/V — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | WM8214SCDS/RV | WM8214SCDS | WM8216SCDS | WM8196SCDS | WM8326 |
|---|---|---|---|---|---|---|
| Brand | Cirrus Logic | Cirrus Logic | Cirrus Logic | Cirrus Logic | Cirrus Logic | Cirrus Logic |
| Package | 28-SSOP (0.209 in, 5.30 mm) | 28-SSOP (0.209 in, 5.30 mm) - same | 28-SSOP (0.209 in, 5.30 mm) - same | 28-SSOP - same family body | 28-SSOP - same family body | 28-lead - same family body |
| Device Type | 16-bit 3-channel AFE / CCD digitiser | 16-bit 3-channel AFE / CCD digitiser | 16-bit 3-channel AFE / CCD digitiser | 16-bit imaging AFE | 16-bit imaging AFE | Stereo audio AFE |
| Sensor Interface | CCD and CIS analogue outputs | CCD and CIS analogue outputs | CCD and CIS analogue outputs | Imaging sensor outputs | Imaging sensor outputs | Audio inputs |
Key Differentiators
- Three integrated 16-bit imaging channels in one package (vs WM8326)
- Identical drop-in option with no parameter change (vs WM8214SCDS/RV)
- Higher channel count than the lower-channel family members (vs WM8216SCDS)
- Imaging-grade 40 MSPS throughput in a 5.30 mm wide package (vs WM8196SCDS)
Design Notes
Estimated: the WM8214SCDS/V is specified at 390 mW dissipation with both analog and digital rails between 2.97 V and 3.63 V. Estimated current draw from the 390 mW figure at a 3.3 V total supply is roughly 118 mA. Route the analog and digital supply pins on separate planes with individual decoupling close to the device pins, and separate them with a ferrite bead or small resistor network so converter ripple and switching return currents do not share the analog supply impedance. Place the analog bypass capacitor directly at the analog supply pin and keep the digital output traces on the opposite side of the device from the sensor inputs.
The sensitive analogue path runs from the CCD or CIS output amplifiers into the converter, so keep that path as short as possible and place the WM8214SCDS/V close to the sensor connector rather than at the far edge of the board. Use a continuous ground plane under the 28-SSOP body, stitch the analog and digital ground returns at a single point near the device supply entry, and keep the pixel clock and digital output lines away from the analog input pins. A solid plane under the package also acts as the heat spreader for the 390 mW dissipated by the device.
Because the device delivers 16-bit conversion resolution, the analogue input settling must be resolved to well below one LSB at the maximum 40 MSPS sample rate. Verify that the sensor output amplifier drive capability and the PCB trace length allow the analogue input to settle within the aperture time, and keep the pixel clock and data lines terminated and referenced properly to avoid coupling into the analogue input pins. Where the sensor amplifier drives long cables, use a source-terminated or differential arrangement close to the device to preserve the noise margin that 16-bit operation demands.
Estimated: with 390 mW dissipated in a 28-SSOP with limited lead area, the device sits close to its allowed internal temperature rise even on a modest copper pour. Provide at least a 20 mm by 20 mm uninterrupted ground and supply copper region around the package, avoid placing the digitiser next to stepper motor drivers, switching regulators or illumination drivers, and add airflow if the module is sealed. Verify the junction temperature with the thermal resistance and ambient values given in the manufacturer datasheet for your actual board and enclosure conditions.
Do not treat the analog and digital supply pins as interchangeable, and do not tie them together at the connector without separate filtering. Another frequent error is assuming the /V and /RV ordering codes indicate different silicon; they identify lead-free ordering options of the same 16-bit, three-channel, 40 MSPS device in the same 28-SSOP body. Finally, confirm the sensor channel mapping and clock phase relationships against the manufacturer timing diagrams before routing, since three-channel CCD readouts require precise clock-to-data alignment.
Compliance Information
The /V suffix on the WM8214SCDS/V denotes the lead-free ordering option, and the manufacturer lists the part as active. Formal RoHS, REACH, halogen-free and conflict-minerals declarations for the exact orderable part number should be taken from the manufacturer declaration documents for the production lot supplied.
