AD977BN - 16-Bit 100 kSPS ADC | Analog Devices
MPN： AD977BN ✗ 停產AD977BN 概覽
An ADC converts an analog voltage into a digital code for measurement, control, instrumentation, and signal-processing systems. The AD977 belongs to the successive-approximation ADC, or SAR ADC, family within the broader data-converter and mixed-signal semiconductor hierarchy. Its 16-bit resolution supports fine amplitude quantization, while its 100 kSPS throughput is suited to accurate acquisition of slowly changing or moderate-bandwidth signals.
The verified product information identifies a 16-bit SAR architecture, one analog input, serial I/O, and operation from a single 5 V supply. Available input ranges include unipolar 0 V to 5 V and 0 V to 4 V, plus bipolar 0 V to 5 V and 0 V to 3.3 V. The AD977 family also offers an external-reference option, while the manufacturer describes the converter as a low-power, high-speed data-acquisition device.
The AD977A is a related family member with a 200 kSPS throughput rate, whereas the AD977 used by AD977BN is specified at 100 kSPS. This distinction matters when selecting a replacement: a faster related device may require different timing, acquisition, and system-level validation even when its resolution and function are similar.
Typical applications include industrial process measurement, laboratory data acquisition, instrumentation, transducer interfaces, and embedded control systems. The serial interface can reduce PCB routing requirements compared with a parallel ADC, but the host processor must read the serial data at the converter's supported rate and account for acquisition and conversion timing.
For robust designs, provide a stable reference and supply, connect the analog input according to the selected input range, and validate signal-conditioning bandwidth against the 100 kSPS throughput. The 20-pin PDIP package is through-hole and is not a direct substitute for surface-mount implementations without a package and pinout review.
This page combines the verified Analog Devices family description, distributor identification, package information, and practical selection guidance. It also distinguishes the AD977BN from the faster AD977A rather than presenting related family variants as interchangeable without qualification.
直接替換替代品，適用於 AD977BN — 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： AD977BN （相同外形與佔位） — 差異在於 Package, Converter Type, Factory Calibration, Supply Voltage.
AD977ANZ
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
AD977ARZ
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →AD977BRZ
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →AD977ARZ-REEL7
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
AD977ARZ-REEL
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
AD977BN 最大額定值與電氣特性
| Converter Type | Successive-approximation ADC |
| 解析度 | 16 bit |
| Number of Analog Inputs | 1 input |
| Throughput Rate | 100 kSPS |
| 供應電壓 | 5 V single supply |
| Input Range, Unipolar | 0 V to 5 V or 0 V to 4 V |
| Input Range, Bipolar | 0 V to 5 V or 0 V to 3.3 V |
| 介面 | Serial I/O |
| 封裝 | 20-pin PDIP |
| Power Dissipation | 100 mW maximum |
| Power-Down Mode | Available |
| Reference | External reference option |
| AD977A Family Throughput | 200 kSPS |
| AD977 Family Throughput | 100 kSPS |
| Technology | BiCMOS |
AD977BN 20-pin pdip 腳位配置指南
AD977BN（20-pin pdip 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： AD977BN.
請參閱 資料表 以查看完整腳位配置。
典型應用
AD977BN 適用於 6 應用s: Industrial Process Measurement, Laboratory Data Acquisition, Precision Sensor Interface, Embedded Control Systems, Test and Measurement Equipment, Audio and Communication Measurement.
Industrial Process Measurement
The AD977BN fits industrial process measurement when the sensed voltage changes slowly enough for its 100 kSPS throughput and the application values 16-bit resolution. Place it after the sensor amplifier, protection network, and analog filter so the selected unipolar or bipolar range remains valid. The single 5 V supply can simplify system partitioning, while the serial interface reduces parallel data routing. Confirm reference stability and calibrate offset and gain because resolution alone does not determine total measurement accuracy.
推薦
Laboratory Data Acquisition
The AD977BN is suitable for laboratory instrumentation that needs a precise 16-bit measurement from a controlled analog source at up to 100 kSPS. Its serial interface is useful when the host controller is nearby and PCB space is constrained, but the controller must handle acquisition, conversion, data transfer, and status timing accurately. Use a stable external reference and carefully shield the analog input from laboratory switching noise. Validate input settling before each sample.
推薦
Precision Sensor Interface
The AD977BN can digitize conditioned outputs from pressure, temperature, position, and other analog sensors when bandwidth and range requirements fit. The 16-bit conversion provides a high-resolution digital value for calibration, monitoring, and control loops, while the 100 kSPS rate is sufficient for many slow or moderate-speed sensing systems. Design the front end for sensor excitation, common-mode voltage, filtering, and overvoltage protection; do not assume the ADC input accepts arbitrary sensor outputs.
推薦
Embedded Control Systems
The AD977BN is appropriate for embedded control and monitoring systems that need a 16-bit ADC rather than a lower-resolution converter. Its 1-input serial architecture can connect to a microcontroller or programmable logic device when the system supports the timing and logic levels required by the ADC. The 5 V supply requirement must be checked against the controller and analog front end. Firmware should account for startup, conversion completion, serial transfer, and any power-down sequence.
推薦
Test and Measurement Equipment
The AD977BN can support precision test equipment, signal analyzers, and calibration systems where a 100 kSPS acquisition rate is adequate. Its 16-bit format is useful for representing low-level analog measurements after suitable amplification and filtering. The serial output may simplify connections to a controller, but analog grounding, reference routing, and clock cleanliness remain critical. For high-speed or wide-bandwidth instruments, verify whether 100 kSPS is sufficient before finalizing the design.
推薦
Audio and Communication Measurement
The AD977BN may be used for slow or moderate-bandwidth audio and communications measurement when the source is conditioned into one of the supported input ranges and the acquisition rate is sufficient. The converter's 16-bit format can improve amplitude resolution for measurement, monitoring, or feedback applications, but it is not a high-resolution audio DAC. Use anti-alias filtering and a defined reference, and check whether the target signal's bandwidth and dynamic range fit the 100 kSPS device rather than assuming general-purpose ADC suitability.
推薦
推薦產品摘要
工程參考資料，適用於 AD977BN — 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 | AD977ANZ | AD977ARZ | AD977BRZ | AD977ARZ-REEL7 | AD977ARZ-REEL |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 20-pin PDIP | 20-pin PDIP | 20-pin PDIP | 20-pin PDIP | 20-pin PDIP | 20-pin PDIP |
主要差異化特點
- AD977BN is specified at 100 kSPS rather than the AD977A family member at 200 kSPS. (對比AD977A)
- Verified distributor information identifies a single 16-bit SAR ADC with serial I/O. (對比AD977A)
- The AD977BN supports a single 5 V supply according to the manufacturer family description. (對比AD977A)
設計說明
Keep the analog input path short and place input filtering or protection components close to the AD977BN pins. The verified data confirms a serial 20-pin PDIP device, but does not provide the exact pin table; use the manufacturer pinout to route the analog input, reference, supply, ground, and serial signals. Maintain a quiet return path and separate sensitive analog routing from digital switching nodes.
Treat acquisition timing as part of the analog signal chain. Confirm the source impedance, settling time, sample-and-hold behavior, and conversion sequence against the selected input range before sampling. A 16-bit converter does not guarantee 16-bit system accuracy if the input is still ringing, the reference is unstable, or the amplifier and filter introduce distortion.
Provide a clean 5 V supply and decouple it near the device according to the manufacturer layout and capacitor guidance. The verified family information states single 5 V operation and 100 mW maximum power dissipation. Verify supply tolerance, startup behavior, grounding, and power-down sequencing with the exact datasheet because those limits are not fully present in the supplied search snippets.
合規資訊
The supplied verified search results identify the manufacturer and product family but do not provide verified compliance statements for the AD977BN.