AD676KN - 16-Bit 100 kSPS SAR ADC | Analog Devices
MPN： AD676KN ✓ 啟用中AD676KN 概覽
An ADC is a data-acquisition semiconductor that converts an analog input voltage into a digital number for processing by a microcontroller, DSP, FPGA, or computer. The AD676 belongs to the successive-approximation ADC, or SAR ADC, family within the broader analog-to-digital converter and signal-conversion hierarchy. SAR converters repeatedly compare the sampled input against a reference-derived internal DAC, making them well suited to moderate-speed measurement and control systems.
The AD676KN provides 16-bit resolution, one analog input, parallel data output, and a 100 kSPS sampling rate. Its on-chip sample-and-hold function allows the analog input to be captured during the conversion interval. The converter also provides autocalibration and no-missing-code operation according to the verified product information, while its 1 MHz full-power bandwidth supports higher-frequency signal sampling than its maximum specified conversion rate alone would suggest.
Internally, the AD676 uses switched-capacitor charge-redistribution architecture rather than a flash or pipeline conversion structure. A parallel bus presents the newly converted 16-bit result directly to digital logic. This arrangement is appropriate for systems that can accommodate a 16-bit data bus and prioritize simple deterministic sampling over the lower pin count of a serial-output converter.
Typical uses include industrial process monitoring, instrumentation, laboratory measurement, audio and waveform acquisition, and embedded control systems. The 100 kSPS rate is suitable for sensors and control signals that do not require megahertz sampling, while the 16-bit resolution provides more quantization levels than a lower-resolution converter.
Designers should account for the AD676KN's parallel interface, analog supply and reference requirements, digital supply noise, and acquisition timing when laying out the PCB. Because the converter is a 28-pin plastic DIP, it is also mechanically suited to through-hole prototyping and legacy-style industrial boards rather than compact surface-mount assemblies.
This page consolidates the verified AD676KN specifications, distributor pricing, temperature and package details, drop-in family alternatives, and practical selection guidance. It also clearly identifies parameters whose values require confirmation in the Analog Devices datasheet rather than inferring them from the product family.
直接替換替代品，適用於 AD676KN — 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： AD676KN （相同外形與佔位） — 差異在於 Autocalibration, Mounting Type, Operating Temperature, Package.
AD676JN
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →AD676CN
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
AD676AN
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
AD676KN 最大額定值與電氣特性
| 解析度 | 16 bit |
| Input Count | 1 input |
| Conversion Architecture | Successive approximation (SAR) |
| Internal Architecture | Switched-capacitor charge redistribution |
| 取樣率 | 100 kSPS |
| Total Conversion Time | 10 µs |
| Output Interface | 16-bit parallel output |
| 封裝 | 28-pin plastic DIP (28-PDIP) |
| Package Body Width | 0.600 in (15.24 mm) |
| 安裝類型 | Through-hole |
| Temperature Grade | Commercial |
| 工作溫度 | 0 °C to +70 °C |
| Sample-and-Hold Function | On-chip |
| Autocalibration | Yes |
| Missing Codes | No missing codes |
| Full-Power Bandwidth | 1 MHz |
| Signal-to-Noise Plus Distortion | 90 dB |
| Total Harmonic Distortion | 97 dB |
| Integral Nonlinearity | 1 LSB |
| Analog Supply | +15 V |
AD676KN 0.600 in (15.24 mm) 腳位配置指南
AD676KN（0.600 in (15.24 mm) 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： AD676KN.
請參閱 資料表 以查看完整腳位配置。
典型應用
AD676KN 適用於 6 應用s: Industrial Process Measurement, Laboratory Instrumentation, Audio Signal Acquisition, Waveform Monitoring, Embedded Control and Data Logging, Sensor Signal Conditioning.
Industrial Process Measurement
The AD676KN fits industrial process-measurement systems that must convert slow or moderate-rate sensor signals into 16-bit digital measurements. Its 100 kSPS conversion rate provides 10 µs total conversion time, while the integrated sample-and-hold function captures the input during the conversion interval. The 28-pin plastic DIP package is practical for through-hole instrument and control boards. In a pressure, temperature, or level instrument, the converter can feed a microcontroller or DSP through its parallel interface. Designers should use separate analog and digital return paths and verify the official reference, bypass-capacitor, and layout requirements.
Laboratory Instrumentation
The AD676KN is appropriate for laboratory instrumentation in which a 16-bit measurement resolution and 100 kSPS sampling rate are useful without requiring a flash ADC. The 1 MHz full-power bandwidth allows the analog front end to present higher-frequency content than the maximum conversion rate, while the on-chip sample-and-hold function simplifies acquisition timing. A parallel data bus can connect directly to suitable digital logic, although it consumes more board routing than a serial interface. The 28-PDIP format is especially useful for legacy laboratory and educational platforms that are built and serviced using through-hole components.
Audio Signal Acquisition
The AD676KN can be used for audio waveform acquisition when the required sampling rate is compatible with its 100 kSPS conversion capability. Its 16-bit resolution provides 65,536 quantization levels, while the 1 MHz full-power bandwidth offers greater analog bandwidth than the maximum conversion rate. An anti-alias filter and appropriately scaled input stage remain necessary to keep out-of-band energy from aliasing into the digital result. The parallel output is useful for dedicated digital capture hardware, although applications with numerous channels may prefer a multiplexed or serial-output ADC to conserve board area.
Waveform Monitoring
The AD676KN suits deterministic waveform-monitoring systems that require predictable 10 µs total conversion time and 16-bit parallel results. Its successive-approximation architecture samples one input at a time, making it suitable for repetitive measurements where multi-channel multiplexing is handled externally. The integrated sample-and-hold function supports acquisition of rapidly changing inputs, while autocalibration helps maintain accuracy over operating conditions. For a digital oscilloscope or vibration-monitoring controller, acquisition timing, clock quality, and digital bus settling should be evaluated together because the verified information does not provide a complete timing table.
Embedded Control and Data Logging
The AD676KN can serve as the sensing frontend in an embedded data logger or control system that needs more resolution than a conventional 8-bit or 12-bit converter. The 100 kSPS maximum rate is suitable for many position, environmental, and analog process inputs, and the 16-bit parallel bus can be sampled by a suitable microcontroller, DSP, or programmable logic. The commercial 0 °C to +70 °C range limits unheated deployments. For installations with wider environmental variation, an industrial-temperature package-matched family variant should be evaluated after confirming its complete ordering details.
Sensor Signal Conditioning
The AD676KN is suitable for sensor interfaces that require direct conversion of conditioned analog voltages into a 16-bit parallel digital value. Its 100 kSPS sampling capability accommodates many resistive, capacitive, and industrial transducer outputs after amplification and filtering. The 1 MHz full-power bandwidth supports signal-chain bandwidth beyond the nominal conversion rate, while the on-chip sample-and-hold function helps isolate acquisition from the conversion cycle. Engineers must maintain compatible input and reference ranges and follow the manufacturer's grounding recommendations, particularly when a sensor returns to a ground referenced on a separate analog board.
工程參考資料，適用於 AD676KN — 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 | AD676JN | AD676CN | AD676AN |
|---|---|---|---|---|
| Package | 28-PDIP | 28-PDIP | 28-PDIP | 28-PDIP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit |
| Sampling Rate | 100 kSPS | 100 kSPS | 100 kSPS | 100 kSPS |
| Total Conversion Time | 10 µs | 10 µs | 10 µs | 10 µs |
| Input Count | 1 input | 1 input | 1 input | 1 input |
| Output Interface | 16-bit parallel | 16-bit parallel | 16-bit parallel | 16-bit parallel |
| Full-Power Bandwidth | 1 MHz | 1 MHz | 1 MHz | 1 MHz |
| Mounting Type | Through-hole | Through-hole | Through-hole | Through-hole |
主要差異化特點
- Wider commercial-temperature alternatives are available for industrial use (對比AD676KN)
- Retains the same verified conversion core (對比AD676JN)
- Provides an established 28-pin plastic-DIP footprint (對比AD676CN)
設計說明
Keep analog input, reference, and supply routing away from the 16-bit parallel output and digital return paths. The AD676KN combines sensitive analog sampling with multiple fast digital transitions, so a clean analog ground region and short return paths should be planned before placing the through-hole device. Confirm the manufacturer's recommended reference and bypass-capacitor placement directly from the datasheet; those component values were not present in the verified extract.
Treat the parallel output as a timing-sensitive 16-bit bus and account for output timing, receiver setup time, and board propagation delay. Although the AD676KN converts at 100 kSPS with a 10 µs total conversion time, acquisition strobes and digital capture logic must still meet the device's specified timing. Avoid relying solely on nominal clock frequency when determining whether a downstream microcontroller or FPGA can capture every conversion reliably.
Do not treat an ADC with the same resolution and sampling rate as a drop-in replacement unless its package, pinout, interface timing, supply arrangement, reference requirements, and temperature grade all match. The AD676 family also includes a serial-output AD677 and ceramic-package versions, which are not automatic replacements for the AD676KN. Verify the complete Analog Devices ordering table and package drawing before substituting any MPN.
合規資訊
The supplied verified data does not state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. The AD676KN is a commercial-temperature IC, but no automotive qualification claim is supported by the provided information.
