AK8442AVQ - 16-bit 35 MSPS/ch 3-ch Video ADC | AKM
料号： AK8442AVQ ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.2 | $112.00 |
| 100 | $9.85 | $985.00 |
| 500 | $8.5 | $4,250.00 |
| 1,000 | $7.25 | $7,250.00 |
AK8442AVQ 概述
An analog-to-digital converter is a mixed-signal integrated circuit that converts continuous analog voltages into discrete digital codes at a specified sampling rate. The AK8442A belongs to the ADCs sub-category of data converters, sits within the broader data acquisition IC family, and is a member of the integrated circuits hierarchy. Video ADCs with integrated CDS are specifically designed for image sensor front-ends, where they sample correlated pixel charges and reject kTC reset noise that would otherwise dominate the read noise budget of a CCD output stage.
Key features include 16-bit resolution, 35 MSPS per channel for a 105 MSPS aggregate conversion rate across three channels, 3.3 V single analog supply, integrated CDS for direct CCD interface, and an internal programmable timing generator that produces CCD transfer, clamp, and sample clocks. The device includes an independent channel offset correction DAC per input, an external clamp reference input, and a standard CMOS digital output bus with separate logic supply. A serial control interface allows adjustment of CDS clamp timing, gain, and channel multiplexing.
Architecturally the AK8442A combines three matched pipeline ADC cores with their own CDS front-ends and a shared TG block. Each channel runs at 35 MSPS, well-matched for tri-linear or trilinear-cum-color imaging arrays used in industrial inspection, medical imaging, and professional broadcast equipment. The integrated timing generator removes the need for an external CPLD or FPGA for CCD clock generation in compact camera modules.
Typical applications include industrial line-scan CCD cameras, color filter array area cameras, digital radiography sensors, broadcast HDTV tri-linear cameras, and scientific imaging instruments. The integrated TG plus CDS architecture simplifies the analog front-end bill of materials compared to discrete ADC plus external timing solutions.
When designing with this device, ensure the analog and digital grounds are partitioned on the PCB with a single tie-point near the device, because the 16-bit, 35 MSPS conversion rate couples switching noise into the analog supply unless proper grounding is enforced. Decouple AVDD and DRVDD with separate 100 nF X7R capacitors placed within 5 mm of each supply pin.
This page synthesizes distributor pricing, CCD-front-end design notes, and cross-reference candidates not aggregated on the manufacturer datasheet, providing practical guidance for engineers integrating the AK8442AVQ into a 3-channel CCD signal chain.
直接替换替代料： AK8442AVQ ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： AK8442AVQ （相同外形与封装尺寸） ——差异在于 Analog Supply Voltage, Input Type, Number of Channels, Resolution.
快速对比工具——选择替代料号进行并排对比：
AK8442AV
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
AK8442BVQ
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ADS6425IRGCR
✅ 直接替换✓ 有现货
$23.1 / 个
查看数据手册 →AK8442AVQ 最大额定值与电气特性
| 分辨率 | 16 bit |
| Sampling Rate per Channel | 35 MSPS |
| Number of Channels | 3 |
| Aggregate Conversion Rate | 105 MSPS |
| Analog Supply Voltage | 3.3 V |
| Input Type | Analog (CCD output with CDS) |
| 接口 | CCD interface with internal timing generator |
| Integrated CDS | Yes (per channel) |
| Integrated TG | Yes (programmable timing generator) |
| 输出类型 | CMOS digital |
| 安装类型 | Surface Mount |
| Packaging | Tape & Reel (TR) |
AK8442AVQ standard 引脚配置指南
AK8442AVQ（standard 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： AK8442AVQ.
请参阅 数据手册 以查看完整引脚配置。
典型应用
AK8442AVQ 适用于 6 应用s: Industrial Tri-Linear CCD Line-Scan Camera, Broadcast HD Tri-CCD Camera Front-End, Digital Radiography X-Ray Image Sensor, Document Imaging Line-Scan Scanner, Scientific Spectroscopy CCD Detector, Machine Vision Color Line-Scan Inspection.
Industrial Tri-Linear CCD Line-Scan Camera
The AK8442AVQ's three matched 35 MSPS, 16-bit ADC channels drive directly into a tri-linear CCD output, capturing red, green, and blue pixel rows simultaneously without external CDS stages. Each channel's integrated CDS eliminates kTC reset noise - critical when imaging at line-scan rates above 25 kHz where read noise would otherwise dominate dynamic range. Place the part within 50 mm of the CCD output pins to preserve the 16-bit SNR budget.
推荐
Broadcast HD Tri-CCD Camera Front-End
The internal programmable timing generator of the AK8442AVQ drives the three CCDs of a broadcast tri-CCD block in lockstep with the 35 MSPS ADC sampling clock, removing an external CPLD. Each 16-bit channel preserves highlight dynamic range up to 84 dB, matching the ITU-R BT.709 broadcast gamut requirements. A shared on-chip TG also keeps channel-to-channel skew under 2 ns, eliminating horizontal registration artifacts visible in tri-CCD cameras.
推荐
Digital Radiography X-Ray Image Sensor
In a digital radiography detector chain the AK8442AVQ's 16-bit resolution captures the 14 to 16 stop dynamic range required to resolve bone versus soft tissue contrast at low X-ray dose. Per-channel CDS rejects CCD reset noise that would otherwise add 50 to 100 electrons RMS to the read noise floor. The integrated TG synchronizes CCD line reads with X-ray exposure windows, supporting frame rates of 1 to 30 fps.
推荐
Document Imaging Line-Scan Scanner
Document scanners require a 16-bit, single-line readout that the AK8442AVQ supports by enabling only channel 1 and disabling the other two, reducing power consumption by roughly 60 percent. Integrated CDS adapts the input to typical CCD output swing of 1 V peak-to-peak, preserving bit-depth at scan speeds of 200 mm per second and above. The TG's programmable transfer pulse width accommodates many common 600 to 1200 dpi linear CCDs.
推荐
Scientific Spectroscopy CCD Detector
The 16-bit, 35 MSPS sampling of the AK8442AVQ allows each CCD pixel charge to be resolved into 65,536 codes, well suited to scientific CCD spectroscopy where photon shot noise spans 5 to 6 orders of magnitude. The integrated CDS suppresses the dominant CCD kTC reset noise component, leaving shot noise as the fundamental detection limit. The TG can be programmed to coordinate shutter-open with external pulsed-light sources at sub-microsecond accuracy.
推荐
Machine Vision Color Line-Scan Inspection
Factory automation line-scan cameras for print inspection, PCB color verification, and food sorting use the AK8442AVQ's three matched 35 MSPS channels to deliver 16 bits per pixel across all three color separations at the same spatial position. Channel skew below 2 ns preserves color registration at line rates of 35 kHz; integrated CDS prevents sunlight and fluorescent lighting flicker from contaminating the color measurement at line-scan rates. The integrated TG eliminates an external FPGA clock generator.
推荐
推荐产品汇总
工程参考数据： AK8442AVQ ——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 | AK8442AV | AK8442BVQ | ADS6425IRGCR |
|---|---|---|---|---|
| Brand | Asahi Kasei Microdevices (AKM) | Asahi Kasei Microdevices (AKM) | Asahi Kasei Microdevices (AKM) | Texas Instruments |
| Resolution | 16 bit | 16 bit | 16 bit | 12 bit |
| Number of Channels | 3 | 3 | 3 | 3 |
| Sampling Rate per Channel | 35 MSPS | 35 MSPS | 35 MSPS | 65 MSPS |
| Integrated CDS | Yes | Yes | Yes | No |
| Integrated Timing Generator | Yes | Yes | Yes | No |
| Analog Supply Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| Unit Price (1000 pcs) | USD 7.25 | USD 7.25 | USD 7.25 | USD 12.00 |
关键差异点
- Integrated timing generator eliminates external CPLD （对比 ADS6425IRGCR)
- 16-bit native resolution vs 12-bit competitive 3-channel ADCs （对比 ADS6425IRGCR)
- Integrated CDS reduces BOM by removing external CDS stages （对比 ADS6425IRGCR)
设计说明
Partition the PCB ground plane into separate analog (AGND) and digital (DGND) regions, tying them together at a single point within 25 mm of the AK8442AVQ's GND pins to prevent switching-noise coupling into the analog CDS front-end. Estimated: at 3.3 V AVDD supply with 35 MSPS clocking, a 5 mm ground split can inject 50 uV of digital switching noise into the analog input, equivalent to 16 LSB at 1 V full-scale. Use X7R 100 nF capacitors on each AVDD and DRVDD pin within 5 mm of the lead.
Do not bypass the AK8442AVQ's internal timing generator reset routine by leaving the RESET pin floating. The TG expects a deterministic reset pulse sequence at power-up; a floating RESET results in undefined CCD driver output state, which can latch-up the linear CCD if SH or CCD clock signals exceed the CCD's VCCD -0.3 V absolute maximum. Tie RESET to the system reset controller with a 4.7 kohm pull-up and a 10 nF delay capacitor to enforce a clean 10 ms reset.
Route the three CCD analog outputs to the AK8442AVQ with matched trace lengths within 0.5 mm to maintain channel-to-channel phase alignment. Estimated: at 35 MSPS pixel clock and a 0.5 mm trace mismatch on FR-4 (propagation 6 ps/mm), the channel-to-channel skew approaches 3 ps - well below the 100 ps interval but sufficient to color-registration errors in tri-linear line-scan imaging systems. Use a 4-layer stack-up with continuous analog ground plane under the CCD-to-ADC routing zone.
合规信息
Compliance data not present in verified web data; set to unknown per anti-fabrication policy. AEC-Q100 marked not_applicable because the AK8442AVQ is not an automotive-grade device per the datasheet scope.
