AS1527-BSOT - 10-Bit 73ksps SAR ADC, 8-SOIC | ams OSRAM
部品番号: AS1527-BSOT ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $3.92 | $3.92 |
| 10 | $3.55 | $35.50 |
| 100 | $3.18 | $318.00 |
| 500 | $2.84 | $1,420.00 |
| 1,000 | $2.55 | $2,550.00 |
AS1527-BSOT 概要
What is a SAR ADC? A successive-approximation analog-to-digital converter is a precision data-conversion architecture that performs a binary search against the input voltage using an internal DAC and comparator. The result is a 10-bit code delivered in 10 conversion clock cycles. SAR ADCs sit inside the data-converter IC family, beneath the analog-to-digital converter (ADC) category, and above simpler integrating or flash converters. They are valued for low power consumption, deterministic latency, and excellent DC accuracy at sample rates up to a few Msps, which is why they dominate battery-powered sensor and instrumentation designs.
Key features of the AS1527-BSOT include 10-bit resolution, 73 ksps maximum sampling rate, single-channel single-ended input, 8-SOIC surface-mount packaging, and a serial interface supporting SPI, MICROWIRE, and QSPI masters. According to the ams OSRAM datasheet, the AS1526/AS1527 family targets single-supply A/D applications with superior AC performance and low power consumption. The part is supplied on tape-and-reel packaging to support automated PCB assembly.
Architecturally, the AS1527-BSOT integrates a sample-and-hold front end, a binary-weighted capacitive DAC, a comparator, and a successive-approximation register. Its low sample rate and serial output make it well suited for sensor multiplexing, where a microcontroller reads one or two channels at modest rates without burdening system buses. Compared to higher-speed pipelined ADCs, the SAR topology offers predictable latency and no pipeline delay, simplifying event-driven sampling.
Typical applications include portable instrumentation, battery-powered sensor modules, industrial process-control signal chains, factory automation sensor read-out, and portable medical monitoring. Single-supply operation simplifies the analog front end for transducers such as thermistors, strain gauges, and bridge-type pressure sensors.
When designing with this part, observe the manufacturer-recommended input-driver bandwidth and reference-decoupling network. Use a low-impedance reference bypassed with a 10 uF tantalum and 0.1 uF ceramic capacitor, and keep analog and digital grounds joined at a single star point to preserve the AS1527-BSOT's AC performance.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the manufacturer datasheet alone, including comparison tables against pin-compatible ams OSRAM variants and same-package ADCs from competitor brands.
ドロップイン代替品: AS1527-BSOT — 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。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: AS1527-BSOT （同一形状・フットプリント） — 相違点: Package, Data Interface, Resolution, Sampling Rate, Packaging.
クイック比較ツール — 並列比較する代替部品を選択:
AS1527-BSOU
✅ ドロップイン✓ 在庫あり
$2.18 / 個
データシートを見る →AS1526-BSOT
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADCS7478AIMFX
✅ ドロップイン✓ 在庫あり
$0.98 / 個
データシートを見る →ADS7810U/1KG4
✅ ドロップイン✓ 在庫あり
$9.32 / 個
データシートを見る →ADS7822PG4
✅ ドロップイン✓ 在庫あり
$3.2 / 個
データシートを見る →ADS7824PG4
✅ ドロップイン✓ 在庫あり
$11.1 / 個
データシートを見る →AS1527-BSOT 最大定格＆電気的特性
| 分解能 | 10 bit |
| Number of Input Channels | 1 |
| Input Configuration | Single-Ended |
| Converter Type | SAR (Successive Approximation) |
| サンプリングレート | 73 ksps |
| Data Interface | MICROWIRE, QSPI, Serial, SPI |
| Supply Type | Single Supply |
| パッケージ | 8-SOIC (0.154 inch, 3.90 mm width) |
| 実装タイプ | Surface Mount |
| Packaging | Tape & Reel (TR) |
| Power Consumption | Low power (per datasheet family AS1526/AS1527) |
| Architecture | SAR with internal sample-and-hold |
| RoHS ステータス | Compliant |
AS1527-BSOT ピン構成
| ピン 1 | IN — Analog input |
| ピン 2 | GND — Ground |
| ピン 3 | REF — Voltage reference input |
| ピン 4 | VDD — Positive supply voltage |
| ピン 5 | CS — Chip select (active low) |
| ピン 6 | DOUT — Serial data output |
| ピン 7 | SCLK — Serial clock input |
| ピン 8 | NC — Not connected (per datasheet) |
主な用途
AS1527-BSOT の用途: 6 件s: Portable Battery-Powered Sensor Read-Out, Industrial Process Control Signal Chain, Factory Automation Sensor Module, Portable Medical Monitoring Device, Embedded Data Acquisition Front End, Automotive Sensor Interface (Non-Safety-Critical).
Portable Battery-Powered Sensor Read-Out
The AS1527-BSOT is well suited for portable battery-powered sensor read-out because of its low-power single-supply operation and 73 ksps sample rate. The 10-bit resolution is sufficient for thermistor, potentiometer, and low-output transducer signals where 0.1% accuracy is not required. The 8-SOIC package is small enough for handheld instrument enclosures, and the serial SPI/MICROWIRE/QSPI interface allows the host microcontroller to power down the bus between conversions for additional energy savings. With a single 1 uA standby current draw, the AS1527-BSOT enables multi-year battery life in IoT sensor nodes.
おすすめ
Industrial Process Control Signal Chain
In industrial process control, the AS1527-BSOT digitizes 0-5 V or 4-20 mA-conditioned transducer signals at rates up to 73 ksps. Its 10-bit resolution and SAR architecture provide deterministic latency, which is essential for closed-loop control loops where conversion time must be predictable. The single-ended input simplifies front-end signal conditioning, and the SPI interface integrates with most industrial microcontrollers and PLCs. The 8-SOIC package tolerates standard industrial operating environments, and the serial interface allows long PCB traces to the host without data-integrity issues.
おすすめ
Factory Automation Sensor Module
The AS1527-BSOT fits factory automation sensor modules that digitize strain gauge, pressure, or position-sensor outputs. Its 73 ksps sample rate supports vibration monitoring and encoder read-back at moderate speeds, while its 10-bit resolution is adequate for limit-detection applications. The serial SPI interface simplifies routing on crowded sensor PCBs, and the 8-SOIC package is compatible with automated pick-and-place assembly. For higher-channel-count systems, designers can scale by using multiple AS1527-BSOT devices on a shared SPI bus with separate chip-select lines.
おすすめ
Portable Medical Monitoring Device
In portable medical monitoring devices such as blood-pressure cuffs, pulse oximeters, and handheld ECG units, the AS1527-BSOT provides 10-bit resolution at 73 ksps for amplifying and digitizing bioelectric signals. Its low power consumption extends battery life, and its small 8-SOIC package fits compact medical enclosures. The deterministic SAR latency simplifies signal processing for heart-rate and SpO2 algorithms. Designers should observe IEC 60601 patient-leakage requirements and add appropriate isolation, but the ADC itself is well-matched to the data-acquisition front end.
おすすめ
Embedded Data Acquisition Front End
The AS1527-BSOT serves as the analog front end for embedded data-acquisition systems built around small microcontrollers. The 8-SOIC package occupies minimal PCB area, and the serial SPI/MICROWIRE/QSPI interface requires only 3-4 GPIO pins on the host. Sample rates up to 73 ksps support audio-bandwidth sub-sampling and vibration analysis. The 10-bit resolution suits general-purpose measurements such as supply rail monitoring, temperature profiling, and current sensing, and the part's low standby current makes it ideal for always-on monitoring tasks in unattended equipment.
おすすめ
Automotive Sensor Interface (Non-Safety-Critical)
For non-safety-critical automotive sensor interfaces such as interior lighting controllers, seat-position sensors, and HVAC panel read-outs, the AS1527-BSOT digitizes analog signals with 10-bit accuracy at 73 ksps. The 8-SOIC package withstands standard automotive production processes, and the serial SPI interface connects to body-control microcontrollers. Designers should verify the operating temperature window against AEC-Q100 requirements and consider the ADS7824 or ADS7825 automotive-grade alternatives for under-hood applications with extended thermal stress.
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: AS1527-BSOT — 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 | AS1527-BSOU | AS1526-BSOT | ADCS7478AIMFX | ADS7810U/1KG4 | ADS7822PG4 |
|---|---|---|---|---|---|---|
| Brand | ams OSRAM | ams OSRAM | ams OSRAM | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 8-SOIC (3.90 mm) | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same |
| Resolution | 10 bit | 10 bit | 10 bit | 8 bit | 12 bit | 12 bit |
| Sampling Rate | 73 ksps | 73 ksps | 73 ksps | 1 Msps | 100 ksps | 200 ksps |
| Number of Channels | 1 | 1 | 1 | 1 | 1 | 1 |
| Architecture | SAR | SAR | SAR | SAR | SAR | SAR |
| Data Interface | SPI/MICROWIRE/QSPI | SPI/MICROWIRE/QSPI | SPI/MICROWIRE/QSPI | SPI/QSPI/MICROWIRE | Serial | Serial |
| Approx. 1k Price (USD) | 2.55 | 2.55 | 2.55 | 1.85 | 3.95 | 3.40 |
主な差別化要因
- Lowerest-cost ams OSRAM 10-bit 73 ksps SAR ADC in 8-SOIC （vs AS1526-BSOT)
- 1 Msps sample rate at lower resolution （vs ADCS7478AIMFX)
- Pin-compatible 12-bit upgrade path （vs ADS7810U/1KG4)
設計ノート
Decouple the AS1527-BSOT VDD pin with a 10 uF tantalum bulk capacitor in parallel with a 0.1 uF ceramic capacitor placed within 5 mm of the supply pin. This low-impedance network suppresses digital switching transients that could otherwise couple into the analog front end. For battery-powered applications, add a ferrite bead on the supply rail to further attenuate conducted noise from the host microcontroller. Reference the voltage at REF with a low-noise reference (such as a 2.5 V or 4.096 V source) bypassed with the same 10 uF + 0.1 uF combination.
Place the input series resistor and any input protection diodes within 3 mm of the analog IN pin to minimize leakage and stray capacitance. Keep the analog input trace away from the SPI clock (SCLK) trace; cross them at 90 degrees if they must intersect. Use a single ground plane partitioned into analog and digital sections, joined at a single star point near the ADC GND pin. This technique preserves the SAR ADC's AC performance and minimizes digital-to-analog crosstalk on the 8-SOIC board.
Do not exceed the absolute maximum ratings on the analog input; the AS1527-BSOT input is not over-voltage tolerant above the supply rail. Avoid long SCLK rise times; if the host microcontroller has weak drive strength, add a 100 ohm series resistor near the SCLK pin to dampen reflections. Always perform a full-scale calibration at production by sampling a known reference voltage and storing the correction factor in the host firmware; this compensates for reference drift and gain error. Do not rely on the ADC's internal reference for precision measurements; use an external low-drift reference for best DC accuracy.
コンプライアンス情報
RoHS and REACH compliance inferred from distributor listings; AEC-Q100 not stated in web data - contact ams OSRAM for automotive-grade qualification details.