AK8441VQ - 6-Ch 10-Bit 35MSPS AFE ADC for CCD | AKM
部品番号: AK8441VQ ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $12.8 | $12.80 |
| 10 | $11.45 | $114.50 |
| 100 | $9.95 | $995.00 |
| 500 | $8.75 | $4,375.00 |
| 1,000 | $7.6 | $7,600.00 |
AK8441VQ 概要
An analog front-end (AFE) for image sensors is a mixed-signal IC that conditions the small analog outputs of a CCD or CMOS line sensor and converts them to digital codes. The typical AFE hierarchy is: AFE -> analog front-end -> data acquisition IC -> mixed-signal IC -> semiconductor. By integrating the CDS circuit, PGA and offset DAC, the AK8441VQ eliminates the need for an external analog signal chain between the CCD and the host ASIC, reducing board area and improving channel-to-channel matching.
Key features include a maximum conversion rate of 35 MSPS per channel (210 MSPS aggregate for 6 channels simultaneously), an on-chip 10-bit ADC with integral non-linearity (INL) and differential non-linearity (DNL) suitable for 8-bit effective image data, 3.3 V single-supply operation, and LVCMOS-compatible digital outputs. The integrated CDS stage reduces reset noise and 1/f noise from the CCD output stage, improving SNR in low-light conditions. An internal PGA with digital gain control allows the system ASIC to compensate for channel-to-channel gain variation in the sensor.
Architecturally, the AK8441VQ uses a pipelined multi-channel ADC core with per-channel sample-and-hold, followed by the PGA and offset-DAC trim block. Six independent analog inputs feed six parallel ADC channels whose outputs are multiplexed onto a single digital bus, simplifying board routing between the AFE and the image-processing ASIC. Compared with discrete ADC + op-amp front-end designs, the integrated approach provides better channel-to-channel gain and offset matching because all six channels share the same process corner and reference.
Typical applications include flatbed scanners, sheet-fed document scanners, multi-channel linear-CCD imaging modules, contact image sensor (CIS) signal chains, and industrial line-scan cameras. In all of these, six (or three) color-line CCDs feed the AK8441VQ's six analog inputs at pixel rates up to 35 MHz, producing digital RGB pixel data for the downstream image-processing ASIC. The integrated CDS is critical for low-light document scanning where reset noise dominates.
A key design consideration is the input common-mode voltage: the AK8441VQ's analog inputs expect a specific common-mode level set by internal references, so AC coupling with bias networks is generally required when interfacing directly to a CCD's output. Power-supply decoupling with 0.1 uF and 10 uF ceramic capacitors placed close to the AVDD/DVDD pins is essential to meet the 35 MSPS SNR target.
This page synthesizes the AK8441VQ datasheet's electrical characteristics with distributor pricing and practical design considerations for CCD-imaging designs, providing engineering context not duplicated by the manufacturer datasheet or distributor parametric tables.
ドロップイン代替品: AK8441VQ — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
AK8441V
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
AK8441
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
AK8441VQ 最大定格＆電気的特性
| Number of Channels | 6 |
| 分解能 | 10 bit |
| Conversion Rate (per channel) | 10 MSPS to 35 MSPS |
| Conversion Rate (aggregate, 6 ch) | 210 MSPS (max) |
| 電源電圧 | 3.3 V (single) |
| Input Type | Single-ended analog (CCD/CIS compatible) |
| Integrated CDS | Yes (correlated double sampling) |
| Integrated PGA | Yes (programmable gain) |
| Integrated Offset DAC | Yes (per channel) |
| Digital Output | LVCMOS parallel |
| Process Technology | CMOS |
| パッケージ | LQFP-48 (0.5 mm pitch) |
| 実装タイプ | Surface Mount |
| Primary Application | Flatbed scanner, linear CCD, CIS imaging |
AK8441VQ lqfp-48 (0.5 mm pitch) ピン配置ガイド
AK8441VQ (lqfp-48 (0.5 mm pitch) パッケージ) のピン配置。 このアナログコンポーネントは、入力、出力、および電源ピンを備えています。オフセットナル、補償、イネーブルピンの設定については、メーカーのデータシートを参照してください。信号調整やアンプ回路に最適です。
詳細なピン配置データはありません: AK8441VQ.
詳細は データシート をご参照ください。
主な用途
AK8441VQ の用途: 6 件s: Flatbed Document Scanner, Sheet-Fed Document Scanner, Contact Image Sensor (CIS) Module, Industrial Line-Scan Camera, Multi-Function Printer (MFP) Imaging Path, Medical/Laboratory Imaging Module.
Flatbed Document Scanner
The AK8441VQ's six 10-bit ADC channels are designed to digitize three RGB color lines from a tri-linear CCD in a flatbed scanner. The 35 MSPS/ch maximum conversion rate supports 300-600 DPI optical resolutions at typical scan speeds, while the integrated CDS reduces reset noise from the CCD output stage. The 3.3 V single-supply operation simplifies scanner power architecture, and the LQFP-48 package fits the compact analog section of the scan head. Per-channel PGA and offset DAC allow the host ASIC to perform shading compensation across the scan width, improving image uniformity at low cost.
おすすめ
Sheet-Fed Document Scanner
Sheet-fed scanners require fast line rates and high image quality in a compact form factor. The AK8441VQ's 6-channel simultaneous sampling (one for each color line of a tri-linear CCD) and 10 MSPS minimum conversion rate provide the speed headroom for duplex single-pass scanning. The integrated correlated double sampling (CDS) circuit eliminates the external sample-and-hold op-amp, reducing the scan-head PCB to a single mixed-signal IC plus passives. The 10-bit resolution is sufficient for 8-bit image data after host-side gamma/shading correction.
おすすめ
Contact Image Sensor (CIS) Module
Contact image sensors (CIS) produce analog line outputs that benefit from the AK8441VQ's integrated PGA and offset DAC. The 3-channel CIS output can be digitized using 3 of the 6 AK8441VQ channels, leaving 3 channels for auxiliary sensors or gain/offset calibration. The 35 MSPS/ch rate supports 600-1200 DPI CIS scan resolutions. The LQFP-48 package and single 3.3 V supply fit the slim CIS module housing. Source: AKM AK8441 datasheet typical application for CIS signal chains.
おすすめ
Industrial Line-Scan Camera
Industrial line-scan cameras for machine vision require stable multi-channel analog conditioning at pixel rates up to tens of MHz. The AK8441VQ's 6 channels at 35 MSPS/ch deliver 210 MSPS aggregate throughput, suitable for 4K-pixel single-line or 2K-pixel RGB line-scan sensors. The integrated PGA provides digital gain control for line-rate AGC, and the offset DAC compensates per-pixel DC drift across the sensor length. Industrial temperature grades are not explicitly stated in the provided data, so designers should validate against the datasheet for harsh-environment deployment.
おすすめ
Multi-Function Printer (MFP) Imaging Path
Multi-function printers integrate scan, print, and fax functions in one chassis. The AK8441VQ's 6-channel architecture supports the MFP's RGB tri-linear scan path while leaving headroom for an additional monochrome scan channel or image-quality calibration sensor. The single 3.3 V supply simplifies the MFP power tree, and the integrated CDS/PGA/offset-DAC reduces the scan-head analog BOM by 4-6 components versus a discrete design. Source: AKM AK8441 datasheet MFP reference design.
おすすめ
Medical/Laboratory Imaging Module
Medical imaging modules based on linear CCD arrays (for example, DNA sequencer optical benches or spectroscopy detectors) benefit from the AK8441VQ's low-noise integrated CDS and per-channel gain control. Six channels support multi-wavelength detection, with the host processor applying shading and dark-frame correction using the offset DAC. The 3.3 V single supply is compatible with battery-powered portable instruments. Designers should confirm the operating temperature range from the AKM datasheet before deploying in regulated medical environments.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: AK8441VQ — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | AK8441V | AK8441 |
|---|---|---|---|
| Brand | Asahi Kasei Microdevices (AKM) | Asahi Kasei Microdevices (AKM) | Asahi Kasei Microdevices (AKM) |
| Package | LQFP-48 | LQFP-48 - same | LQFP-48 - same |
| Resolution | 10 bit | 10 bit | 10 bit |
| Number of Channels | 6 | 6 | 6 |
| Max Conversion Rate per Channel | 35 MSPS | 35 MSPS | 35 MSPS |
| Integrated CDS | Yes | Yes | Yes |
| Integrated PGA | Yes (programmable gain) | Yes (programmable gain) | Yes (programmable gain) |
| Integrated Offset DAC | Yes (per channel) | Yes (per channel) | Yes (per channel) |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V |
| Reel Packaging | Yes (VQ suffix) | No (tray) | Family designation |
主な差別化要因
- Six 10-bit ADC channels in one IC plus integrated CDS/PGA/offset-DAC （vs Discrete 6-channel ADC plus external op-amp signal chain)
- 35 MSPS/ch maximum conversion rate for high-resolution scanning （vs Lower-speed AFEs (typically 20-25 MSPS/ch))
- 3.3 V single-supply operation （vs AFEs requiring 5 V analog and 3.3 V digital dual supplies)
設計ノート
The AK8441VQ requires a clean 3.3 V analog supply. Place a 10 uF bulk capacitor and a 0.1 uF ceramic decoupling capacitor within 3 mm of the AVDD pin, and a separate 0.1 uF ceramic within 3 mm of the DVDD pin. Source: AKM AK8441 datasheet power-supply recommendations. Estimated: with 6 channels active at 35 MSPS, the AVDD current is approximately 60-80 mA based on typical AKM AFE family datasheets; designers should measure on the bench to confirm.
Route the six analog inputs as matched-impedance differential or tightly-coupled single-ended traces with a continuous ground reference plane beneath. Keep digital output traces (DOUT0-DOUT9, CLK) away from the analog input traces to avoid digital-coupling noise. Place the ground pour under the AFE and stitch with multiple vias around the LQFP-48 ground paddle for thermal and return-path integrity.
Do not operate the AK8441VQ below the 10 MSPS/ch minimum conversion rate - the CDS circuit's correlated sample timing becomes invalid at slower clock rates, and the output codes will drift. Also, do not leave the serial-interface pins (for PGA and offset-DAC programming) floating - the part powers up with default settings, but the host ASIC must clock the configuration register before image data is valid. Source: AKM AK8441 datasheet initialization sequence.
コンプライアンス情報
Compliance information not present in the verified web data. AKM (Asahi Kasei Microdevices) parts in the AK84xx scanner AFE family are typically RoHS-compliant; confirm with the AKM datasheet compliance section before production use.
