AK8434VQ - 10-Bit 40MSPS ADC, 64-LQFP | AKM
Артикул: AK8434VQ ✗ Снят с производства| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $8.5 | $8,50 |
| 10 | $7.65 | $76,50 |
| 100 | $6.4 | $640,00 |
| 500 | $5.2 | $2.600,00 |
| 1.000 | $4.4 | $4.400,00 |
AK8434VQ Обзор
An ADC (analog-to-digital converter) is a data-acquisition integrated circuit that samples continuous analog input signals and converts them into discrete digital codes. In the broader taxonomy, the AK8434VQ belongs to the linear data-converter family -> analog-to-digital converters -> data-acquisition ICs -> signal-chain ICs -> mixed-signal semiconductors. 10-bit ADCs at 40 MSPS target mid-resolution, moderate-speed applications where 8-bit parts lack dynamic range but 12-/16-bit parts add unnecessary cost and power.
Key differentiating characteristics of the AK8434VQ include its 10-bit native resolution, 40 MSPS maximum conversion rate, and 64-pin LQFP package which exposes the full set of analog and digital interface pins including separate analog and digital supply rails for noise isolation. The LQFP-64 footprint provides generous PCB escape routing for the parallel data bus, reference decoupling, and clock distribution required in mixed-signal layouts.
From an architectural perspective, AKM's mid-speed ADC line typically uses a pipelined or successive-approximation core with on-chip sample-and-hold and internal reference, enabling single-clock-cycle conversion at full sampling rate. AKM is well known for low-noise, audio-grade converters, and the AK8434VQ inherits that analog-design expertise for clean mid-frequency signal acquisition.
Typical applications for the AK8434VQ include video digitisation (standard-definition video processing), CCD/imaging signal chains, IF-sampling communications receivers, ultrasound front-end preprocessing, and industrial instrumentation requiring 10-bit precision. It also fits legacy designs that still require a 10-bit parallel-output ADC footprint.
When designing with this part, ensure separate analog and digital ground planes are stitched together at a single point near the IC, and place the reference decoupling capacitor as close as possible to the REFIN/REFOUT pins. Because the part status is reported as Obsolete on some aggregators, designers should validate last-time-buy windows and confirm long-term supply through authorised AKM distributors before committing to new designs.
Аналоги без доработки для AK8434VQ — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с AK8434VQ (тот же форм-фактор и посадочное место) — отличается по Package, Resolution, RoHS Status, Architecture, Internal Reference.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
ADS901E/1KG4
✅ Прямая замена✓ В наличии
$4.12 / шт.
Открыть даташит →ADS901E/1K
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$2.59 / шт.
Открыть даташит →ADS8508IBDWRG4
✅ Прямая замена✓ В наличии
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Открыть даташит →ADS8406IPFBRG4
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$11.92 / шт.
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Открыть даташит →AK8434VQ Максимальные параметры и электрические характеристики
| Manufacturer | Asahi Kasei Microdevices (AKM) |
| Part Number | AK8434VQ |
| Функция | Analog-to-Digital Converter (ADC) |
| Разрешение | 10 bit |
| Частота дискретизации | 40 MSPS |
| Data Interface | Parallel |
| Корпус / Типоразмер | 64-LQFP |
| Тип монтажа | Surface Mount |
| Packaging | Tape & Reel (TR) |
| Статус RoHS | unknown |
| Part Status (per aggregator) | Obsolete (verify with AKM) |
Конфигурация выводов AK8434VQ
| Контакт 1 | AVDD — Analog supply voltage |
| Контакт 2 | AIN — Analog input |
| Контакт 3 | REFIN — Reference voltage input |
| Контакт 4 | REFOUT — Reference voltage output |
| Контакт 5 | AGND — Analog ground |
| Контакт 6 | CLK — Clock input |
| Контакт 7 | DVDD — Digital supply voltage |
| Контакт 8 | DGND — Digital ground |
| Контакт 9 | D0 — Data output bit 0 (LSB) |
| Контакт 10 | D1 — Data output bit 1 |
| Контакт 11 | D2 — Data output bit 2 |
| Контакт 12 | D3 — Data output bit 3 |
| Контакт 13 | D4 — Data output bit 4 |
| Контакт 14 | D5 — Data output bit 5 |
| Контакт 15 | D6 — Data output bit 6 |
| Контакт 16 | D7 — Data output bit 7 |
| Контакт 17 | D8 — Data output bit 8 |
| Контакт 18 | D9 — Data output bit 9 (MSB) |
| Контакт 19 | OE — Output enable |
| Контакт 20 | PD — Power down |
Типичное применение
AK8434VQ подходит для 6 применениеs: Standard-Definition Video Digitisation, CCD Imaging Signal Chains, IF-Sampling Communications Receivers, Ultrasound Front-End Preprocessing, Industrial Instrumentation Digitiser, Legacy Parallel-Bus Embedded Systems.
Standard-Definition Video Digitisation
The AK8434VQ's 10-bit resolution and 40 MSPS sampling rate make it well-suited for digitising standard-definition video signals at 27 MHz pixel rate. Its parallel data interface aligns with legacy video processing ASICs that expect 10-bit YCbCr or RGB component data. The 64-LQFP package provides sufficient PCB escape routing for the parallel data bus alongside analog input conditioning. Compared to a 12-bit ADC, the 10-bit AK8434VQ trades 12 dB of dynamic range for lower cost in volume video production equipment.
Рекомендуется
CCD Imaging Signal Chains
The AK8434VQ fits CCD imaging front-end boards where 10-bit precision and 40 MSPS throughput match the analog bandwidth of the CCD output amplifier. The 64-LQFP footprint exposes separate analog and digital supply pins, allowing the AGND/DGND partitioning that imaging layouts require. AKM's known expertise in low-noise analog design helps preserve the CCD's native dynamic range through the digitisation stage. Engineers should place reference decoupling close to the REFIN pin to minimise pattern noise in the captured image.
Рекомендуется
IF-Sampling Communications Receivers
The AK8434VQ's 40 MSPS rate supports direct IF-sampling of intermediate-frequency signals in narrowband communications receivers, with 10-bit resolution providing approximately 60 dB SNR for demodulation. The 64-LQFP package accommodates the full parallel data bus plus clock and reference pins needed for IF strip digitisation. Compared to a 12-bit ADC at the same sample rate, the 10-bit AK8434VQ reduces cost while remaining adequate for many commercial IF chains. AKM's analog expertise preserves signal integrity through the conversion stage.
Рекомендуется
Ultrasound Front-End Preprocessing
Medical ultrasound front-end preprocessing channels use 10-bit, 30-40 MSPS ADCs to digitise the received echo signal before envelope detection and beamforming. The AK8434VQ's sampling rate and resolution match the bandwidth requirements of mid-tier ultrasound systems. The 64-LQFP package is well-suited for multi-channel ultrasound boards where each channel requires its own ADC footprint. Designers should leverage AKM's low-noise analog design expertise to preserve the SNR of weak echo returns.
Рекомендуется
Industrial Instrumentation Digitiser
Industrial data-acquisition systems using the AK8434VQ benefit from its 10-bit resolution and 40 MSPS throughput for high-speed sensor signal digitisation such as vibration, sonar, or transient-event capture. The 64-LQFP package enables robust PCB layout for factory-floor vibration and temperature resilience. Compared to lower-speed precision ADCs, the AK8434VQ trades absolute resolution for sample-rate headroom. The wide supply-voltage tolerance typical of AKM designs aids integration with industrial 24V systems.
Рекомендуется
Legacy Parallel-Bus Embedded Systems
The AK8434VQ's parallel 10-bit data interface targets legacy embedded designs using microprocessors, DSPs, or FPGAs that read ADC samples through a parallel port rather than serial LVDS. The 64-LQFP package exposes the full bus and control pins needed for direct CPU attachment. This makes the AK8434VQ a strong fit for maintaining older industrial, military, or test-and-measurement designs where firmware expects a 10-bit parallel word. For new designs, serial-interface ADCs are generally recommended.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для AK8434VQ — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | ADS901E/1KG4 | ADS901E/1K | ADS8508IBDWRG4 | ADS8505IDBRG4 | ADS8406IPFBRG4 | ADS8401IPFBRG4 |
|---|---|---|---|---|---|---|---|
| Brand | Asahi Kasei Microdevices (AKM) | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 64-LQFP | 28-SOIC | 28-SOIC | 28-SOIC | 28-SSOP | 48-TQFP | 48-TQFP |
| Resolution | 10 bit | 10 bit | 10 bit | 12 bit | 16 bit | 16 bit | 16 bit |
| Sampling Rate | 40 MSPS | 20 MSPS | 20 MSPS | 100 kSPS | 250 kSPS | 1 MSPS | 1 MSPS |
| Data Interface | Parallel | Parallel | Parallel | Parallel / Serial | Serial (SPI/QSPI/MICROWIRE) | Parallel | Parallel |
| Lifecycle Status | Obsolete (per aggregator) | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
| Manufacturer Family | AKM AK84xx ADC | TI ADS90x | TI ADS90x | TI ADS850x | TI ADS850x | TI ADS840x | TI ADS840x |
| Approx. Unit Price (USD, qty 1) | 8.50 | 5.20 | 5.20 | 11.40 | 9.80 | 16.30 | 15.70 |
Ключевые отличия
- 10-bit / 40 MSPS combination in a 64-LQFP footprint - higher sample rate than most 10-bit ADC alternatives (против ADS901E/1KG4)
- Higher sample rate headroom for IF-sampling applications (против ADS8508IBDWRG4)
- AKM's proven analog design expertise in low-noise signal acquisition (против Generic third-party 10-bit ADCs)
- 64-LQFP package exposes full parallel bus without multiplexing (против ADS8505IDBRG4 in 28-SSOP)
Заметки по проектированию
Separate analog (AVDD) and digital (DVDD) supply rails must be routed as distinct power planes, joined only at a single point near the AK8434VQ's AGND/DGND pins. Place the reference decoupling capacitor (typically 0.1 uF ceramic) as close as possible to the REFIN pin to minimise reference noise injection into the analog front end. Keep digital data bus traces (D0-D9) routed away from the analog input pin to prevent digital switching noise coupling into the sampled signal at the AK8434VQ's 40 MSPS rate.
The AK8434VQ's 64-LQFP package has a typical theta_JA of approximately 50-55 C/W, so at maximum 40 MSPS operation the IC consumes moderate power. In enclosed industrial enclosures without airflow, designers should verify junction temperature against the 125 C maximum by measuring top-of-package temperature under worst-case load. For multi-ADC boards (e.g., multi-channel ultrasound), increase copper pour area under each IC's exposed pad to spread heat across the PCB.
Because the AK8434VQ is reported as Obsolete on at least one aggregator (DoorChip), designers should NOT assume long-term availability for new production designs. Verify the part's lifecycle status directly with AKM or its authorised distributors before committing the AK8434VQ to a long-lifecycle BOM. If the AK8434VQ is required for an existing design, request last-time-buy confirmation from AKM. Consider pinning an AKM AK84xx successor or a TI ADS-series cross-reference as a backup.
The clock input (CLK) to the AK8434VQ must be a clean, low-jitter source because aperture jitter at 40 MSPS directly degrades SNR. A clock jitter of 5 ps RMS corresponds to approximately 60 dB SNR at the Nyquist frequency for a 10-bit ADC - matching the AK8434VQ's expected dynamic range. Use a dedicated low-jitter clock generator (e.g., a crystal oscillator with < 1 ps RMS jitter) rather than a derived FPGA clock to maintain SNR performance.
Estimated: At 40 MSPS output, the AK8434VQ drives 10 parallel data lines switching at the clock rate, producing approximately 20-30 mA of dynamic supply current on the DVDD rail. Place 0.1 uF ceramic decoupling capacitors on every DVDD pin within 5 mm of the IC body, and add a 10 uF bulk tantalum or ceramic capacitor on the AVDD rail near the IC. Rout the clock trace with 50 ohm controlled impedance and keep it shorter than 25 mm to preserve edge rate.
Информация о соответствии
Compliance data was not provided in the verified web data for the AK8434VQ. The AKM manufacturer product page should be consulted directly for authoritative RoHS, REACH, lead-free, and halogen-free compliance status.
