AS1527-BSOT - 10-Bit 73ksps SAR ADC, 8-SOIC | ams OSRAM
MPN: AS1527-BSOT ✓ Hoạt độngAS1527-BSOT Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho AS1527-BSOT — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với AS1527-BSOT (cùng hình factor và footprint) — khác nhau ở Package, Data Interface, Resolution, Sampling Rate, Packaging.
AS1527-BSOU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →AS1526-BSOT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ADCS7478AIMFX
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ADS7810U/1KG4
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ADS7822PG4
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ADS7824PG4
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →AS1527-BSOT Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 10 bit |
| Number of Input Channels | 1 |
| Input Configuration | Single-Ended |
| Converter Type | SAR (Successive Approximation) |
| Tỷ lệ lấy mẫu | 73 ksps |
| Data Interface | MICROWIRE, QSPI, Serial, SPI |
| Supply Type | Single Supply |
| Hộp | 8-SOIC (0.154 inch, 3.90 mm width) |
| Kiểu lắp đặt | Surface Mount |
| Packaging | Tape & Reel (TR) |
| Power Consumption | Low power (per datasheet family AS1526/AS1527) |
| Architecture | SAR with internal sample-and-hold |
| Trạng thái RoHS | Compliant |
Cấu hình chân AS1527-BSOT
| Chân 1 | IN — Analog input |
| Chân 2 | GND — Ground |
| Chân 3 | REF — Voltage reference input |
| Chân 4 | VDD — Positive supply voltage |
| Chân 5 | CS — Chip select (active low) |
| Chân 6 | DOUT — Serial data output |
| Chân 7 | SCLK — Serial clock input |
| Chân 8 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
AS1527-BSOT phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho AS1527-BSOT — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Lowerest-cost ams OSRAM 10-bit 73 ksps SAR ADC in 8-SOIC (vsAS1526-BSOT)
- 1 Msps sample rate at lower resolution (vsADCS7478AIMFX)
- Pin-compatible 12-bit upgrade path (vsADS7810U/1KG4)
Ghi chú thiết kế
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.
Thông tin tuân thủ
RoHS and REACH compliance inferred from distributor listings; AEC-Q100 not stated in web data - contact ams OSRAM for automotive-grade qualification details.