AD676BD - 16-Bit 100 kSPS Sampling ADC | Analog Devices
MPN： AD676BD ✗ 停產AD676BD 概覽
A sampling ADC samples an analog input and converts it into a digital code for measurement, instrumentation, signal processing, and control systems. The AD676 belongs to the SAR ADC family, where successive approximation compares the sampled voltage against an internal DAC. Its parallel output presents all 16 result bits together rather than serializing them through a shift register, which supports simpler data capture at moderate clock rates.
The verified device data identifies 16-bit resolution, 100 kSPS conversion throughput, one SAR input, no missing codes, 1 LSB integral nonlinearity, 97 dB THD, 90 dB signal-to-noise-plus-distortion ratio, and 1 MHz full-power bandwidth. On-chip autocalibration digitally corrects internal nonlinearities. The parallel interface provides 16-bit output data, while the integrated sample-and-hold function reduces the external sampling circuitry required.
The AD676 datasheet also identifies dynamic and direct-current specifications. Dynamic parameters such as S/(N+D), THD, and IMD characterize signal-chain behavior, while DC parameters support precision measurement. The 28-CDIP mechanical format through-hole package is larger than modern leadless options but remains useful where through-hole construction, serviceability, and legacy instrument compatibility are priorities.
Typical uses include industrial measurement, process monitoring, audio and signal processing, data acquisition, and precision instrumentation. Design implementation must observe the manufacturer's analog, digital, reference, and power-supply requirements. Because acquisition accuracy depends on the complete signal chain, reference stability, source impedance, grounding, clock quality, and input bandwidth are as important as nominal converter resolution.
This page combines exact verified specifications, official documentation links, commercial availability references, and application guidance. It does not invent unreported electrical, environmental, pricing, pinout, or compliance values; unavailable engineering data remains explicitly identified in the specifications.
直接替換替代品，適用於 AD676BD — 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： AD676BD （相同外形與佔位） — 差異在於 Architecture, Autocalibration, Input Channels, Mounting Type, Package.
此產品無可直接替換的替代品。
申請替代品AD676BD 最大額定值與電氣特性
| ADC Type | Successive-approximation sampling ADC |
| Architecture | Switched-capacitor charge redistribution |
| 解析度 | 16 bit |
| 取樣率 | 100 kSPS |
| Conversion Time | 10 us |
| Input Channels | 1 input |
| Output Format | 16-bit parallel output |
| Output Codes | No missing codes |
| Integral Nonlinearity | 1 LSB |
| Total Harmonic Distortion | 97 dB |
| Signal-to-Noise Plus Distortion Ratio | 90 dB |
| Full-Power Bandwidth | 1 MHz |
| On-Chip Sample-and-Hold | Included |
| Autocalibration | On-chip autocalibration |
| 封裝 | 28-pin SBCDIP |
| 安裝類型 | Through-hole |
AD676BD 28-pin sbcdip 腳位配置指南
AD676BD（28-pin sbcdip 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： AD676BD.
請參閱 資料表 以查看完整腳位配置。
典型應用
AD676BD 適用於 6 應用s: Industrial Process Measurement, Precision Data-Acquisition Systems, Audio and Signal Processing, Legacy Test and Measurement Equipment, Instrumentation Signal Capture, Parallel Digital Control Systems.
Industrial Process Measurement
The AD676BD fits process instrumentation that requires deterministic acquisition and a 16-bit parallel result bus. Its 100 kSPS conversion rate, 10 us conversion time, and no-missing-codes specification support repeatable measurement of slowly changing or multiplexed sensor signals. Place the converter in a grounded analog section, use a stable reference, and follow the official AD676 input-conditioning requirements. The main design trade-off is the 28-CDIP footprint, which is larger and slower to assemble than a modern surface-mount ADC but can suit legacy or serviceable industrial instrumentation.
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Precision Data-Acquisition Systems
The AD676BD is suitable for precision data-acquisition front ends that value a 16-bit parallel interface and on-chip sample-and-hold. At 100 kSPS, it captures 100,000 conversions per second while presenting each result on 16 parallel outputs, allowing capture logic to latch the code without serializing every bit. The supplied data specifies 1 LSB INL and no missing codes. Validate source settling, reference accuracy, acquisition time, and digital timing because those system parameters determine whether nominal converter performance is preserved.
推薦
Audio and Signal Processing
The AD676 can support audio or general signal-processing paths that require a 16-bit sampling ADC with 100 kSPS throughput. Verified dynamic specifications include 90 dB S/(N+D), 97 dB THD, and 1 MHz full-power bandwidth, providing useful evidence for distortion-sensitive designs. The parallel output simplifies connection to dedicated logic in a controlled system. Designers should still define an input anti-alias filter, clock source, and gain structure, and should compare the ADC’s frequency-domain performance with the complete front end.
推薦
Legacy Test and Measurement Equipment
The AD676BD is attractive for legacy test and measurement equipment that already uses 28-CDIP through-hole converters or requires a parallel acquisition bus. Its 16-bit resolution, 100 kSPS conversion rate, integrated sample-and-hold, and autocalibration address the core measurement chain without relying on a serial interface. The package also eases inspection and replacement in serviceable instruments. Modern redesigns should weigh its larger footprint and legacy packaging against newer converters with smaller packages, serial links, and integrated reference options.
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Instrumentation Signal Capture
The AD676BD can capture instrumentation signals when a system needs direct 16-bit parallel digital data and predictable sampling timing. The 10 us conversion time corresponds to the documented 100 kSPS rate, while the on-chip sample-and-hold helps acquire the selected input. For bridge, sensor, or waveform signals, the surrounding circuit must provide suitable excitation, filtering, grounding, and input drive. Its 1 MHz full-power bandwidth should not be interpreted as 1 MHz conversion capability; applications above 100 kSPS would normally require a higher-speed converter.
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Parallel Digital Control Systems
The AD676BD can serve as the analog measurement element in a parallel digital control system where converted values are latched directly into logic. Sixteen output lines provide the complete code in one transfer, avoiding the serial-clock and data-valid overhead of a serial ADC. A 100 kSPS rate is ample for many supervisory, positioning, and condition-monitoring loops, although actual loop bandwidth also depends on computation latency. Firmware must handle output coding, conversion timing, calibration, saturation, and any diagnostic range checks defined by the complete design.
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推薦產品摘要
工程參考資料，適用於 AD676BD — 比較、設計指引及合規資訊。
選型指南
主要差異化特點
- Parallel acquisition output (對比No verified drop-in alternative available)
- Documented throughput and conversion time (對比No verified drop-in alternative available)
- Integrated acquisition and correction (對比No verified drop-in alternative available)
設計說明
Follow the official AD676 datasheet for analog and digital supply connections, decoupling locations, and sequencing. Keep high-current return paths away from the converter’s reference and input-ground nodes. Because the supplied data does not state supply voltage or decoupling values, do not infer them; use the manufacturer’s named capacitors and layout requirements to avoid reference modulation and conversion noise.
Reserve the exact 28-pin SBCDIP footprint and verify pin numbering against the official package drawing before layout release. Route the analog input away from clock and parallel-output nets, maintain a compact reference return, and place required bypass capacitors at the pins specified by Analog Devices. The verified material establishes the package family but does not supply the complete pin map.
Design the analog front end around the documented 1 MHz full-power bandwidth and 100 kSPS conversion rate. Use an appropriate low-pass or anti-alias filter, control source impedance, and provide enough acquisition time for the internal sample-and-hold capacitor. Measured system noise and distortion depend on the source, reference, clock, grounding, and filtering—not only the ADC’s 16-bit nominal resolution.
合規資訊
The supplied verified results identify the manufacturer, converter architecture, resolution, throughput, interface, and package, but they do not provide formal RoHS, REACH, automotive, lead-free, halogen-free, or conflict-minerals declarations.
