AD977BR - 16-Bit 100 kSPS Serial ADC | Analog Devices
MPN： AD977BR ✓ 啟用中AD977BR 概覽
An ADC is a data-acquisition semiconductor that converts an analog voltage into a digital code for measurement, control, instrumentation, and signal-processing systems. The AD977 belongs to the successive-approximation ADC family, also called a SAR ADC. Compared with flash and pipeline converters, a SAR ADC generally uses sequential internal comparisons, making this device suitable for moderate-speed precision acquisition where output resolution, serial communication, and low power are more important than very high conversion throughput.
The AD977BR provides a 16-bit conversion result at 100 kSPS from a single 5 V supply. Its input architecture supports unipolar ranges of 0 V to 5 V and 0 V to 4 V, plus bipolar ranges of ±5 V and ±3.3 V. The verified sources also identify external-reference and power-down options, internal-reference capability, and industrial-temperature packaging. These features allow the same converter family to address sensor interfaces, process-control measurements, laboratory acquisition, and industrial diagnostic systems.
The switched-capper architecture is factory calibrated, as stated in the Analog Devices datasheet description. Sampling and conversion behavior must be coordinated with the serial interface and external analog network. The AD977BR uses serial I/O rather than a parallel data bus, reducing package pin count and PCB routing requirements while requiring compatible firmware or control logic. The AD977A member provides a higher 200 kSPS rate, whereas the AD977BR is the 100 kSPS version.
Typical applications include industrial process monitoring, sensor signal acquisition, medical instrumentation, laboratory measurement, communications equipment, and embedded data-acquisition systems. A system designer should verify the exact input range, reference configuration, timing, electrical limits, and pin-level requirements against the manufacturer datasheet before layout or firmware release.
The most important design consideration is preserving analog signal integrity while supporting the serial interface. Keep the analog input and reference paths short, use suitable bypass and filtering components, and account for source impedance during acquisition. The verified data does not provide all timing, accuracy, temperature, and reference-load details, so those values should be obtained from the official AD977/AD977A datasheet.
This page consolidates the verified manufacturer and distributor information, separates confirmed AD977BR characteristics from unknown parameters, and provides application guidance without treating unverified values as specifications.
直接替換替代品，適用於 AD977BR — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： AD977BR （相同外形與佔位） — 差異在於 Package, Architecture, Interface.
AD977ARZ
✅ 直接替換聯絡詢價
查看資料表 →AD977ABRZ
✅ 直接替換📋 參考替代品（不在目錄中）
AD977BR 最大額定值與電氣特性
| Converter Type | Successive-approximation ADC |
| 解析度 | 16 bit |
| Throughput Rate | 100 kSPS |
| Input Count | 1 input |
| 供應電壓 | 5 V single supply |
| Unipolar Input Range | 0 V to 5 V and 0 V to 4 V |
| Bipolar Input Range | ±5 V and ±3.3 V |
| 介面 | Serial I/O |
| Internal Reference | 2.5 V internal reference |
| External Reference Option | Available; exact ratings not provided |
| Power Dissipation | 100 mW maximum |
| Power-Down Mode | Available |
| Architecture | Factory-calibrated switched-capacitor ADC |
| 封裝 | 20-lead SOIC |
| Package Code | SOP |
| Terminal Form | Gull wing |
| 安裝類型 | Surface mount |
| Temperature Grade | Industrial |
| AD977A Related Throughput | 200 kSPS for AD977A; AD977BR is 100 kSPS |
AD977BR sop 腳位配置指南
AD977BR（sop 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： AD977BR.
請參閱 資料表 以查看完整腳位配置。
典型應用
AD977BR 適用於 6 應用s: Industrial Process Measurement, Sensor Signal Acquisition, Medical Instrumentation, Laboratory Data Acquisition, Communications and RF Monitoring, Embedded Control Systems.
Industrial Process Measurement
The AD977BR fits industrial process-monitoring channels that require a 16-bit measurement at 100 kSPS while operating from one 5 V supply. Its serial I/O can connect to a microcontroller or controller without a wide parallel data bus, and the verified unipolar ranges of 0–5 V and 0–4 V support suitable sensor-conditioning outputs. Use the converter acquisition sequence and external filtering to preserve accuracy; the supplied data does not provide detailed timing or accuracy limits, so final channel settling must be verified against the manufacturer datasheet.
推薦
Sensor Signal Acquisition
For pressure, temperature, position, or current-sensor interfaces, the AD977BR provides a 16-bit SAR conversion at 100 kSPS with selectable unipolar or bipolar input ranges. The 0–5 V unipolar range is useful for many sensor front ends, while ±3.3 V and ±5 V options can match bipolar sensor outputs. The analog input network, reference arrangement, sampling capacitor, and source impedance must be designed together because the verified snippets do not specify acquisition-time or drive-current details.
推薦
Medical Instrumentation
The AD977BR can serve as the acquisition converter in medical or diagnostic instruments where 16-bit numerical resolution and moderate sampling speed are required. A 100 kSPS rate is appropriate for many pressure, flow, or physiological monitoring signals when the system bandwidth is well below the Nyquist limit. The verified data does not state medical certification, isolation, leakage-current, or safety ratings, so medical use requires separate system qualification and compliance review.
推薦
Laboratory Data Acquisition
The AD977BR is suited to laboratory measurement front ends that need a 16-bit ADC result and serial data transfer at up to 100 kSPS. Its single 5 V supply simplifies system power planning, while the 20-lead SOIC package supports conventional PCB assembly. A laboratory design should account for analog grounding, shielded interconnects, reference stability, and input filtering. Confirm acquisition settling, noise, linearity, and reference specifications from the official datasheet because those values are not included in the supplied search snippets.
推薦
Communications and RF Monitoring
In communications or RF monitoring equipment, the AD977BR can digitize slow or moderate-bandwidth envelope and monitor signals when 100 kSPS is adequate. The 16-bit resolution can preserve small amplitude variations after suitable conditioning, and the serial interface helps reduce board-space requirements. It is not a substitute for a high-speed RF sampler when the monitored waveform contains significant content above 50 kHz; filter and anti-alias design must be based on the actual signal bandwidth.
推薦
Embedded Control Systems
The AD977BR works as a precision measurement front end for embedded controllers because it combines a 100 kSPS conversion rate with serial I/O. A microcontroller can issue conversion control signals, receive the digital result, and process the measurement without a 16-wire parallel bus. Power-down mode can reduce consumption during inactive intervals, although shutdown current and wake timing are not stated in the verified snippets. Firmware and hardware should therefore follow the manufacturer timing diagram.
推薦
推薦產品摘要
工程參考資料，適用於 AD977BR — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | AD977ARZ | AD977ABRZ | AD976BR |
|---|---|---|---|---|
| Package | 20-lead SOIC | 20-lead SOIC; package stated in cross-reference listing | 20-lead SOIC; package stated in comparison listing | 20-lead SOIC; package inferred only from family search result |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
主要差異化特點
- 100 kSPS throughput (對比AD977ABRZ)
- Single 5 V operation (對比AD977ARZ)
- Serial I/O integration (對比AD976BR)
- Multiple input-range choices (對比AD977ABRZ)
設計說明
Place the analog input, reference, and converter supply bypass components close to their associated pins. Keep the high-impedance analog input route short and separate from serial clock and data traces. The verified snippets do not specify exact layout values, so use the manufacturer application guidance and datasheet recommendations for capacitor selection, grounding, and exposed routing requirements.
Treat the serial interface as a controlled digital timing problem. Confirm clock polarity, conversion timing, data validity, and power-up behavior from the AD977/AD977A datasheet before writing firmware. Provide adequate pull-up or pull-down termination only where the interface specification calls for it; arbitrary resistor values can change edge behavior or create unwanted current.
The verified listing states a single 5 V supply and 100 mW maximum power dissipation, but it does not provide operating supply current. Before estimating system power, obtain the ADC supply-current and power-up specifications from the manufacturer datasheet and include regulator tolerance, analog reference current, external circuitry, and power-down behavior in the budget.
Do not treat a related-family MPN as a confirmed drop-in replacement solely because it appears in a cross-reference search result. AD977ARZ and AD977ABRZ are named in comparison pages, but the supplied data does not verify every pin, timing, electrical, and temperature requirement. Compare the official datasheets and confirm the package suffix and interface behavior before substitution.
合規資訊
The supplied verified search results do not explicitly provide compliance declarations for AD977BR. Do not infer RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-mineral status from the product listing alone.
