AD976BR - 16-Bit 100 kSPS ADC | Analog Devices
料号： AD976BR ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
AD976BR 概述
An ADC is an analog-to-digital converter, a semiconductor that transforms a continuously varying analog voltage into a numeric code. Within the broader hierarchy, an ADC is a data-acquisition and signal-conversion IC; a successive-approximation ADC performs conversion by comparing the input voltage with an internally generated DAC and successive trial bit decisions. This architecture provides a practical balance between conversion throughput, resolution, power consumption, and implementation complexity for industrial, communications, instrumentation, and embedded control systems.
Key verified features of the AD976BR include 16-bit resolution, 100 kSPS throughput, one analog input, single 5 V operation, selectable external or internal 2.5 V reference, an on-chip clock, a high-speed parallel interface, and a maximum input range stated in the retrieved data as 100 mV. The manufacturer material also identifies low-power operation and both external and internal reference choices. The 28-lead SOIC package is confirmed by distributor and comparison listings.
The AD976BR uses a switched-capacitor successive-approximation architecture. During conversion, the internal sample-and-hold network captures the input, while the comparison and DAC network determine successive code bits. Because the converter uses a parallel interface, the host system must capture or latch the 16-bit result and handle the associated digital timing. The AD976BR is therefore most useful when moderate sampling rates are sufficient but software-based or low-speed serial conversion would be inadequate.
Typical applications include industrial process monitoring, sensor-interface systems, communications equipment, data-acquisition instruments, and embedded measurement platforms. The 100 kSPS rate is suitable for acquiring slowly changing or burst-sampled signals, while the 16-bit code width supports precision measurement and control. The single-supply architecture can simplify system design when a 5 V analog rail is already available, although input conditioning, reference stability, digital grounding, and timing remain important engineering concerns.
When designing around the AD976BR, place input, reference, and decoupling connections according to the manufacturer datasheet and keep the analog input path away from high-current digital switching nodes. Check acquisition time, input impedance, source drive capability, reference configuration, and the host parallel-interface timing. Do not substitute a converter merely because its resolution matches; pin compatibility, sampling architecture, input range, reference behavior, and acquisition timing must also be verified.
This page combines verified Analog Devices product information, distributor package and interface details, application guidance, comparison fields, and design notes. It also explicitly identifies where pricing, pinout, lifecycle, or replacement data are not present in the supplied web evidence.
直接替换替代料： AD976BR ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： AD976BR （相同外形与封装尺寸） ——差异在于 Architecture, Input Range, Power Dissipation, Resolution, Supply Voltage.
快速对比工具——选择替代料号进行并排对比：
AD976BRZ
✅ 直接替换📋 参考替代料（不在目录中）
AD976AARZ
✅ 直接替换📋 参考替代料（不在目录中）
AD976ABR
✅ 直接替换📋 参考替代料（不在目录中）
AD976ABRZRL
✅ 直接替换📋 参考替代料（不在目录中）
AD9761ARSZ
✅ 直接替换📋 参考替代料（不在目录中）
AD976BR 最大额定值与电气特性
| 分辨率 | 16 bit |
| Throughput Rate | 100 kSPS |
| Architecture | Successive-approximation, switched-capacitor ADC |
| 电源电压 | 5 V single supply |
| Analog Input Count | 1 input |
| Input Range | 100 mV maximum |
| Reference | Internal or external 2.5 V reference |
| 接口 | High-speed parallel interface |
| Clock | On-chip clock |
| Power Dissipation | 100 mW maximum |
| 封装 | 28-lead SOIC |
| Package Type | Surface-mount SOIC |
| 引脚数 | 28 pins |
| Temperature Grade | Industrial |
| 安装方式 | Surface mount |
| Terminal Form | Gull wing |
| Package Shape | Rectangular |
AD976BR rectangular 引脚配置指南
AD976BR（rectangular 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： AD976BR.
请参阅 数据手册 以查看完整引脚配置。
典型应用
AD976BR 适用于 7 应用s: Industrial Process Measurement, Communications Receive Path, Precision Data-Acquisition Instrument, Sensor Interface and Conditioning, Embedded Control and Monitoring, Audio and Measurement Front End, Power and Environmental Monitoring.
Industrial Process Measurement
The AD976BR fits industrial process-measurement channels that require 16-bit numerical resolution but sample pressure, temperature, level, or flow signals at a moderate rate. Its single analog input can acquire one conditioned sensor channel at a time, while the 100 kSPS throughput supports fast conversion bursts and sequencing. The 5 V single-supply requirement is convenient when the measurement board already uses a 5 V analog rail, and the selectable 2.5 V reference supports controlled excitation and ADC scaling. The parallel interface reduces serial-protocol overhead for a host controller, although the system must latch the digital result correctly. The key limitation is the 100 mV maximum input range shown in the retrieved data, so amplifier gain and input protection are required for common industrial sensor outputs.
推荐
Communications Receive Path
The AD976BR is appropriate for communications equipment that needs high-resolution digitizing of controlled intermediate signals without the 200 kSPS AD976A throughput. The 16-bit code width can preserve amplitude detail in receiver measurement, feedback, calibration, or monitoring paths, while the high-speed parallel interface can connect the converter to digital signal-processing or FPGA logic. The internal-clock and internal-reference options can simplify a fixed-channel acquisition block, whereas an external reference may be preferred when the RF or baseband subsystem requires coordinated calibration. Designers must still account for analog gain, anti-alias filtering, clock jitter, output-code timing, and PCB return paths. The converter's 100 kSPS rate is the decisive constraint for signals whose bandwidth or modulation rate requires faster sampling.
推荐
Precision Data-Acquisition Instrument
The AD976BR can serve as the ADC in precision laboratory and instrumentation equipment when a 16-bit measurement path and 100 kSPS rate match the test bandwidth. A single input is suitable for multiplexed measurement systems when the analog switch and amplifier settling time are controlled; the converter itself must not be asked to compensate for insufficient acquisition time. The parallel interface can reduce firmware overhead by allowing the controller to capture the code directly, while the internal 2.5 V reference option provides a compact starting point. For instrumentation accuracy, reference noise, source impedance, grounding, calibration, and input filtering can dominate the final error budget. The AD976BR is therefore best used as the conversion element in a carefully designed analog front end rather than as a complete measurement front end.
推荐
Sensor Interface and Conditioning
The AD976BR is suitable for digitizing conditioned outputs from sensors when the target resolution is 16 bits and the measurement bandwidth does not exceed the 100 kSPS capability. A bridge, thermocouple, or resistive sensor will generally need amplification, filtering, excitation, and possibly ratiometric reference compensation before the ADC input. The AD976 family supports a choice of internal or external 2.5 V reference, which can simplify a calibrated analog front end, but the selected reference mode must match the sensor and calibration architecture. Because the specified input range is only 100 mV maximum in the retrieved data, the signal conditioner must keep the applied voltage within that limit. The parallel interface is useful for deterministic acquisition, while the internal clock can reduce external clock-routing complexity.
推荐
Embedded Control and Monitoring
The AD976BR can be integrated into an embedded monitoring system when a controller needs a deterministic 16-bit conversion result from one analog channel. Its 100 kSPS rate is useful for sampled process variables, actuator feedback, and supervisory measurements that do not require continuous high-rate sampling. The 28-lead SOIC package provides a conventional surface-mount form factor, while the parallel interface must be mapped carefully to the MCU, FPGA, or CPLD. A 5 V analog rail and selectable 2.5 V reference make board-level power planning predictable when other circuitry already uses 5 V. Firmware designers should allow adequate settling time between channel changes, account for conversion latency, and avoid presenting a new code until the required acquisition interval has elapsed. The AD976BR is a conversion component, not a replacement for the analog front end.
推荐
Audio and Measurement Front End
The AD976BR may be considered for audio test, audio monitoring, or other narrowband measurement front ends when a 100 kSPS conversion rate is adequate and the analog signal is properly conditioned. The 16-bit resolution supports detailed numerical capture, while the parallel interface can feed a processor or digital test system without adding a serial ADC bus. The fixed 5 V supply and 2.5 V reference options simplify rail planning, but audio designs still need low-noise grounding, shielded or tightly routed analog inputs, suitable anti-alias filtering, and gain control. The converter is not inherently an audio codec and does not provide amplification, filtering, or automatic input-range management. Verify acquisition behavior for waveform shapes and sampling requirements, especially when the input is bipolar, noisy, or substantially above the stated 100 mV maximum input range.
推荐
Power and Environmental Monitoring
The AD976BR is applicable to calibrated power or environmental monitoring systems that need accurate numeric readings from a conditioned analog sensor rather than direct high-voltage measurement. A divider, current-sense circuit, temperature transducer, or environmental sensor can feed the ADC after attenuation, amplification, and filtering. The 16-bit code width is valuable when the final control loop or data logger requires better resolution than a coarse sensor interface, while 100 kSPS is more than adequate for many slow environmental variables. The internal or external 2.5 V reference choice should be coordinated with the sensor excitation so that drift and calibration remain predictable. Designers must provide overvoltage and ESD protection, maintain input settling, and route analog and digital grounds carefully. This application benefits from stable references and calibrated conversion more than from maximum sampling speed.
推荐
推荐产品汇总
工程参考数据： AD976BR ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | AD976BRZ | AD976AARZ | AD976ABR | AD976ABRZRL | AD9761ARSZ |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
关键差异点
- AD976 family conversion rate （对比 AD976AARZ)
- Targeted throughput rather than maximum family speed （对比 AD976ABR)
- Single-input, parallel-interface architecture （对比 AD9761ARSZ)
- Clear family-level supply and reference positioning （对比 AD976BRZ)
设计说明
Route the analog input as a short, quiet trace and place the input-conditioning network near the converter. Keep digital control and interface routing away from the input node to reduce coupling from clock and parallel-output activity. The supplied data does not provide a complete pinout, so the final capacitor placement and signal-loop geometry must follow the official AD976/AD976A datasheet.
Design the supply network for the single 5 V operating requirement and place bypass capacitors at the converter supply pins with the shortest practical return path. Because the AD976BR is a 16-bit converter, supply noise and ground bounce can affect code stability even when the nominal 5 V rail is correct. Confirm the datasheet's recommended capacitor values and allowable ripple before layout release.
Use the selectable internal or external 2.5 V reference only after deciding whether the system needs autonomous operation or coordinated calibration. Reference noise, decoupling, and grounding can appear directly as conversion error in a high-resolution ADC. If an external reference is selected, verify its startup, load, temperature behavior, and interaction with the analog front end using the manufacturer guidance.
Do not treat the AD976A as an automatic replacement for AD976BR: the verified throughput changes from 100 kSPS to 200 kSPS, and the exact package, temperature grade, reference behavior, and suffix-specific ordering must match. Likewise, do not assume AD976BRZ is interchangeable solely because it shares the family name. Validate the complete manufacturer ordering table, pinout, timing, and electrical limits before substitution.
Treat the parallel output bus as a synchronous digital interface. Route the data lines consistently, account for output timing relative to the converter clock, and keep the receiving device's input capacitance from creating excessive edge degradation. The supplied sources identify a high-speed parallel interface but do not provide complete timing values or a pin table, so the host timing design must use the manufacturer datasheet.
合规信息
The supplied verified data does not provide explicit RoHS, REACH, lead-free, halogen-free, or conflict-minerals statements. AEC-Q100 is treated as not applicable because AD976BR is identified as an industrial-grade ADC, not an automotive-qualified variant.
