AD976ARZ - 16-Bit 100 kSPS SAR ADC | Analog Devices
部品番号: AD976ARZ ✓ 生産中AD976ARZ 概要
An ADC is an analog-to-digital converter, a semiconductor that samples a continuous voltage and converts it into a numeric value for processing, storage, or transmission. The AD976 belongs to the successive-approximation ADC, or SAR ADC, family within the broader ADC and data-converter hierarchy. SAR converters repeatedly compare the sampled input against a generated reference and progressively determine each output bit. Their architecture is widely used where moderate conversion speed, accurate results, and a compact parallel interface are more important than very high sampling rates.
The AD976 provides a 16-bit conversion resolution and a throughput rate of 100 kSPS. It operates from a single 5 V supply, accepts a single-ended analog input, and offers a parallel data interface. An internal 2.5 V reference and on-chip clock are integrated into the converter. According to Analog Devices, the AD976 and AD976A are factory calibrated and fully tested for signal-to-noise ratio and total harmonic distortion as well as offset, gain, and linearity characteristics.
Maximum power dissipation is specified at 100 mW, allowing the converter to fit industrial, instrumentation, communications, and embedded-control systems without requiring a high-power thermal design. The AD976A member of the family reaches 200 kSPS, but the AD976ARZ specifically operates at 100 kSPS. This distinction is important when selecting a replacement because throughput is one of the key parameters used to determine drop-in compatibility.
Typical uses include precision process measurement, industrial transducer acquisition, laboratory instrumentation, communications equipment, and embedded systems that need a parallel 16-bit conversion result. The 100 kSPS throughput supports waveforms and control loops that require substantially more resolution than a conventional 8-bit converter while avoiding the complexity and power requirements of a much faster high-speed ADC.
When designing around the AD976ARZ, verify the analog input range, reference configuration, acquisition timing, and digital interface mapping against the manufacturer datasheet. Input conditioning should limit noise and establish a signal range compatible with the converter. PCB layout should keep the analog input path short and isolate parallel data routing from sensitive input nodes to reduce conversion error and digital coupling.
This page consolidates the verified manufacturer and distributor information for AD976ARZ, including pricing, technical distinctions, package constraints, and selection guidance that are more useful for an engineering decision than a distributor title alone. It also distinguishes the confirmed 28-pin SOIC AD976AR option from faster AD976A and AD976B variants that cannot be treated as drop-in equivalents.
ドロップイン代替品: AD976ARZ — 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: AD976ARZ （同一形状・フットプリント） — 相違点: Data Interface, On-Chip Clock, Package, Supply Voltage.
AD976AR
✅ ドロップイン価格はお問い合わせください
データシートを見る →AD976ARZ 最大定格＆電気的特性
| ADC Type | Successive Approximation (SAR) |
| 分解能 | 16 bit |
| サンプリングレート | 100 kSPS |
| Input Channel Type | Single-ended |
| Number of Inputs | 1 input |
| 電源電圧 | 5 V |
| Analog Supply Voltage Range | 4.75 V to 5.25 V |
| Internal Reference Voltage | 2.5 V |
| Data Interface | Parallel |
| On-Chip Clock | Integrated |
| Maximum Power Dissipation | 100 mW |
| Process Technology | BiCMOS |
| パッケージ | 28-pin SOIC |
| 実装タイプ | Surface Mount |
AD976ARZ 28-pin soic ピン配置ガイド
AD976ARZ (28-pin soic パッケージ) のピン配置。 このアナログコンポーネントは、入力、出力、および電源ピンを備えています。オフセットナル、補償、イネーブルピンの設定については、メーカーのデータシートを参照してください。信号調整やアンプ回路に最適です。
詳細なピン配置データはありません: AD976ARZ.
詳細は データシート をご参照ください。
主な用途
AD976ARZ の用途: 6 件s: Industrial Transducer Acquisition, Precision Laboratory Instrumentation, Communications Signal Monitoring, Embedded Control and Data Logging, Process Control Feedback, Portable Measurement Equipment.
Industrial Transducer Acquisition
The AD976ARZ fits industrial sensor-acquisition systems that require 16-bit measurement resolution without the data rate of a high-speed waveform converter. Its 100 kSPS throughput provides up to 100,000 samples per second, while the single-ended input and integrated 2.5 V reference simplify the front end. Conditioning transducers for a compatible input range, then presenting the parallel result to a processor, allows slow process variables to be digitized with substantially more resolution than an 8-bit converter. The 100 mW maximum power dissipation also limits thermal burden in distributed acquisition equipment, although the engineer must verify the input range, acquisition timing, and environmental limits in the manufacturer datasheet.
おすすめ
Precision Laboratory Instrumentation
The AD976ARZ is appropriate for laboratory instruments that digitize low-bandwidth analog measurements and benefit from a 16-bit result. At 100 kSPS, the converter can capture the output of a sensor or controlled stimulus while its internal 2.5 V reference supports a more complete measurement chain than an uncompensated converter. The parallel interface allows the result to be latched into digital control logic without a serial protocol. Designers should preserve a short analog input path, use stable reference and supply arrangements, and consult the datasheet for the exact acquisition, offset, gain, SNR, and linearity characteristics required by the instrument specification.
おすすめ
Communications Signal Monitoring
The AD976ARZ can support communications monitoring or control equipment where the monitored signal falls within the converter's 100 kSPS capability. Its 16-bit resolution offers 65,536 digital codes, and the parallel output supports direct transfer into a digital signal processor or communications controller. The integrated clock and 2.5 V reference can reduce the number of external timing and reference components, while the single 5 V supply simplifies system power planning. For sensitive RF or communications circuitry, input attenuation, anti-alias filtering, grounding, and isolation are essential; the converter itself is not a radio-frequency ADC and should only be selected after bandwidth and aliasing requirements are established.
おすすめ
Embedded Control and Data Logging
The AD976ARZ is well suited to embedded systems that periodically measure an analog control variable and retain the 16-bit result in firmware or external storage. The 100 kSPS rate provides more temporal resolution than a slow low-speed ADC, while the parallel interface can be sampled by a microcontroller or programmable logic device. The 100 mW maximum power dissipation is useful in compact equipment, and the integrated 2.5 V reference reduces calibration complexity. Designers should check the digital interface timing, output coding, and reference specifications in the official datasheet, and should avoid changing the analog input range without recalculating the scaling and protection network.
おすすめ
Process Control Feedback
The AD976ARZ can serve as the measurement element in a closed-loop process-control system that samples a feedback sensor and supplies a 16-bit digital result to control logic. A 100 kSPS conversion rate supports many slow or moderate process loops, while the single-ended input and integrated reference help standardize the acquisition stage. Input filtering, surge protection, grounding, and sensor excitation design remain important because the converter does not replace signal conditioning or protection. Because the verified sources do not provide the operating-temperature range, accuracy grades, or environmental qualification, installation in harsh machinery requires confirmation against the official Analog Devices documentation.
おすすめ
Portable Measurement Equipment
The AD976ARZ is useful in portable measurement equipment that needs higher resolution than a low-cost 8-bit converter while keeping power use moderate. The converter operates from one 5 V supply, dissipates no more than 100 mW, and provides a 100 kSPS sampling rate through a parallel interface. Its internal 2.5 V reference and on-chip clock can simplify the analog subsystem, leaving more board area for the sensor, display, and communications sections. For a battery-powered design, the complete power budget must include the 5 V regulator, processor, display, and interface loads. The verified operating-temperature range is unavailable, so enclosure temperature conditions should be checked before field deployment.
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: AD976ARZ — 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 | AD976AR |
|---|---|---|
| Brand | Analog Devices | Analog Devices |
| Package | 28-pin SOIC | 28-pin SOIC |
| Converter Type | Successive-approximation ADC | Successive-approximation ADC |
| Resolution | 16 bit | 16 bit |
| Sampling Rate | 100 kSPS | 100 kSPS |
| Input Type | Single-ended, 1 input | Single-ended, 1 input |
| Supply Voltage | Single 5 V | Single 5 V |
| Internal Reference | 2.5 V | 2.5 V |
| Data Interface | Parallel | Parallel |
| Maximum Power Dissipation | 100 mW | 100 mW |
| Process Technology | BiCMOS | BiCMOS |
主な差別化要因
- Confirmed 16-bit resolution at a 100 kSPS sampling rate （vs AD976AR)
- Single 5 V architecture with integrated conversion resources （vs AD976AR)
- Parallel 16-bit output suitable for direct digital capture （vs AD976AR)
設計ノート
Route the single-ended analog input as a short, guarded trace directly from the conditioning network to the converter. Keep digital output traces away from the input and reference nodes, use a continuous ground reference, and place decoupling and input-filter components close to their associated pins. The supplied data confirms a 5 V supply, 2.5 V internal reference, and parallel interface, but it does not provide the manufacturer layout artwork; use the official datasheet's reference configuration and grounding guidance before finalizing a multilayer layout.
Budget the converter against its specified maximum power dissipation of 100 mW, then design the complete analog rail around the confirmed 4.75 V to 5.25 V analog supply range. Place the required bypass capacitors at the supply pins, control return currents through the ground plane, and account for digital output-transition current in the regulator and return-path design. The verified excerpts do not state the digital supply range or exact decoupling values, so those requirements must be taken directly from the official datasheet rather than estimated.
Treat acquisition timing as a complete signal-chain requirement rather than selecting the converter only by its 100 kSPS headline rate. The analog front end must provide a signal within the confirmed or datasheet-defined input range, and an anti-alias filter should restrict out-of-band energy before the switched-capacitor input samples the waveform. Check source impedance, settling time, clock arrangement, and digital read timing against the manufacturer specifications. Because the supplied excerpts omit the input range and acquisition timing, neither value should be guessed during design-in.
コンプライアンス情報
The verified excerpts did not provide explicit compliance declarations. The Z suffix and comparison-page references were not treated as proof of RoHS, REACH, lead-free, halogen-free, or conflict-mineral compliance.