AD677KN - 16-Bit 100 kSPS Serial SAR ADC | Analog Devices
MPN： AD677KN ⚠ 最後購買機會AD677KN 概覽
A sampling ADC is a data-acquisition device that samples an analog input voltage and converts it into a digital number. In the system hierarchy, the AD677KN is a serial-output ADC, a data converter, and a semiconductor integrated circuit. Its 16-bit resolution provides 65,536 digital codes, making it suitable for instrumentation and signal-acquisition systems where accurate conversion of a changing analog input is required without an extremely high sampling rate.
Key features include a 16-bit resolution, a 100 kSPS conversion rate, serial output, an autocalibrating on-chip sample-and-hold function, and no missing codes. The manufacturer describes 99 dB THD, 92 dB signal-to-noise-plus-distortion performance, and 1 MHz full-power bandwidth. On-chip autocalibration digitally corrects internal nonlinearities, improving conversion consistency without requiring an external trimming procedure.
The AD677KN is designed around a switched-capacitor charge-redistribution converter rather than a flash or pipeline architecture. Serial data output reduces the number of interface signals compared with a parallel ADC, which helps conserve board area and connector pins. The supplied distributor records identify the AD677KN as a single-input, single-SAR, 16-pin PDIP device with a 100 kSPS conversion rate.
Typical uses include process-control instrumentation, industrial sensor interfaces, laboratory measurement equipment, audio and low-bandwidth signal acquisition, digital instrumentation, and embedded data-collection systems. The converter is appropriate where 16-bit resolution and 100 kSPS throughput are sufficient, but a multi-megasample-per-second flash or pipeline ADC would be unnecessary.
The AD677KN is a last-time-buy product, so production continuity requires inventory planning, a documented last-time-buy order, or qualification of a verified alternative. Designers should also allow for the 10 microsecond conversion interval when defining acquisition timing and digital-sample cadence.
This page combines manufacturer specifications, distributor lifecycle information, available same-family drop-in references, and practical design guidance. It distinguishes documented AD677KN facts from unavailable pricing and pin-level data, helping engineers make sourcing and design decisions without treating an unreported value as a manufacturer specification.
直接替換替代品，適用於 AD677KN — 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： AD677KN （相同外形與佔位） — 差異在於 Missing Codes, Mounting Type, Package, Total Conversion Time, Total Harmonic Distortion.
AD677KNZ
✅ 直接替換📋 參考替代品（不在目錄中）
AD677JNZ
✅ 直接替換📋 參考替代品（不在目錄中）
AD677KN 最大額定值與電氣特性
| 解析度 | 16 bit |
| 取樣率 | 100 kSPS |
| Total Conversion Time | 10 us |
| Converter Architecture | Switched-capacitor charge redistribution |
| Output Format | Serial, 16 bit |
| Input Channels | 1 channel |
| Sample-and-Hold Function | On-chip, autocalibrating |
| Missing Codes | 0 LSB |
| Total Harmonic Distortion | 99 dB |
| Signal-to-Noise Plus Distortion | 92 dB |
| Full-Power Bandwidth | 1 MHz |
| 封裝 | 16-pin narrow plastic DIP (PDIP) |
| 安裝類型 | Through-hole insertion |
AD677KN 16-pin narrow plastic dip (pdip) 腳位配置指南
AD677KN（16-pin narrow plastic dip (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： AD677KN.
請參閱 資料表 以查看完整腳位配置。
典型應用
AD677KN 適用於 6 應用s: Industrial Sensor Signal Acquisition, Process Control and Monitoring, Laboratory Measurement Equipment, Audio and Low-Bandwidth Digital Conversion, Digital Test and Measurement, Embedded Data Collection Systems.
Industrial Sensor Signal Acquisition
The AD677KN fits industrial sensor-acquisition systems requiring 16-bit conversion resolution and a 100 kSPS sampling rate without a high-speed flash converter. Its specified 99 dB THD and 92 dB SND help preserve low-level sensor information, while the 10 microsecond conversion time supports a 100 kSPS acquisition cadence. Place the ADC after a low-noise amplifier and analog filter scaled to the device input range. Because the AD677 is LAST TIME BUY, production designs should document a last-time-buy quantity or verify an approved same-footprint suffix before releasing new equipment.
推薦
Process Control and Monitoring
The AD677KN can digitize slow process variables such as pressure, temperature, or flow in a laboratory or industrial control loop. Its 16-bit resolution provides 65,536 codes, while the 100 kSPS rate allows acquisition of the signal without the cost and power of a much faster converter. The 10 microsecond conversion interval must be included in the loop timing, and serial output simplifies connections to a microcontroller or digital controller. Sampling filters should reject high-frequency noise ahead of the ADC rather than relying on digital correction after acquisition.
推薦
Laboratory Measurement Equipment
The AD677KN is appropriate for bench instruments and laboratory measurement systems where display resolution and dynamic-range performance matter more than maximum throughput. Its 92 dB SND, 99 dB THD, and absence of missing codes support deterministic acquisition from slow analog sources, while the switched-capacitor architecture and on-chip sample-and-hold simplify the converter section. Use the 1 MHz full-power bandwidth as a signal-path selection criterion rather than as a 1 MSPS sampling capability. The active device should be supported by calibration reference and carefully controlled analog grounding for repeatable laboratory results.
推薦
Audio and Low-Bandwidth Digital Conversion
The AD677KN can serve as the conversion element in specialized audio, communication, or instrumentation systems that need more than 8-bit resolution but do not require a multi-megahertz sampling rate. Its serial interface reduces parallel-bus routing, and the specified 99 dB THD and 92 dB SND provide useful dynamic-range headroom for a 16-bit converter. The 100 kSPS rate must be matched to the source bandwidth, while the 1 MHz full-power bandwidth describes the analog input path. Verify the serial timing and digital interface levels against the manufacturer datasheet before connecting a specific digital signal processor.
推薦
Digital Test and Measurement
The AD677KN is suitable for a digital test instrument that samples a controlled analog source and compares the converted result against a reference value. Its 16-bit output provides adequate code density for many calibration and characterization tasks, and the 100 kSPS rate is useful for sweeping slower test vectors. Autocalibration helps reduce internal nonlinearity, while the serial output can feed a controller or capture device over a modest number of pins. Designers should keep the analog input path away from digital switching currents and establish the required acquisition settling time before presenting a sample to the user interface.
推薦
Embedded Data Collection Systems
The AD677KN can function as the analog front-end converter in an embedded acquisition system that logs sensor, waveform-envelope, or control data. A 100 kSPS rate and serial output reduce wiring and interface complexity, which is useful where the controller has limited parallel-input pins. The application must observe the 10 microsecond conversion period and provide sufficient analog gain before the ADC input. Because the component is in LAST TIME BUY, the long-term sourcing plan should be settled before deployment; remaining inventory or an approved same-package family suffix is more predictable than assuming future production.
推薦
推薦產品摘要
工程參考資料，適用於 AD677KN — 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 | AD677KNZ | AD677JNZ | AD677JN |
|---|---|---|---|---|
| Package | 16-pin narrow PDIP | 16-pin narrow PDIP | 16-pin narrow PDIP | 16-pin narrow 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 us | 10 us | 10 us | 10 us |
| Output Format | Serial, 16 bit | Serial, 16 bit | Serial, 16 bit | Serial, 16 bit |
| Total Harmonic Distortion | 99 dB | 99 dB | 99 dB | 99 dB |
| Signal-to-Noise Plus Distortion | 92 dB | 92 dB | 92 dB | 92 dB |
| Full-Power Bandwidth | 1 MHz | 1 MHz | 1 MHz | 1 MHz |
主要差異化特點
- Closest documented same-family equivalent (對比AD677KNZ)
- Sufficient resolution for general-purpose acquisition (對比AD677JNZ)
- Clear sampling timing for system integration (對比AD677JN)
設計說明
The supplied excerpts do not publish the AD677KN supply-voltage range, analog input range, or power-consumption limits, so the power tree must be checked against the official AD677 datasheet before layout. Do not derive these rails from nominal device descriptions. In particular, verify the reference-voltage requirement and any relationship between the analog supply, digital supply, and input range. Because AD677KN is LAST TIME BUY, freeze the power architecture and approved external component set at the same time as the ADC sourcing decision.
Keep the analog input path short and isolate it from serial clock and digital-output return currents. Place any input anti-alias filter capacitors close to the ADC input, and place the converter's decoupling capacitors at the associated supply pins with short ground returns. Use the 1 MHz full-power bandwidth as an analog-path constraint and the 10 microsecond conversion time as the digital-timing constraint. The exact pin names, supply pins, and recommended capacitor values must be taken from the official pin configuration and application guidance rather than inferred from generic ADC layouts.
The AD677KN uses a serial output, so the clock and serial-data lines should be routed together where practical to minimize differential skew between them. Respect the output-impedance and series-resistance guidance in the manufacturer datasheet, and terminate the interface appropriately at the receiving device. Do not treat the 100 kSPS conversion rate as permission for an arbitrarily fast serial clock; transfer timing must satisfy both the 10 microsecond conversion interval and the receiver's input setup-and-hold requirements.
A common sourcing error is assuming that a shared AD677 family number automatically guarantees suffix equivalence. Confirm that the selected replacement is physically a 16-pin narrow PDIP, supports the required supply and analog input ranges, and has the required operating-temperature and qualification conditions. The AD677 also has a 28-lead SOIC family option, which is not a drop-in replacement for the 16-pin AD677KN footprint. Record the approved manufacturer suffix and supplier lot in the bill of materials and change-control documentation.
合規資訊
The supplied excerpts confirm the AD677KN package and converter functionality but do not provide compliance declarations for this exact ordering suffix. RoHS, REACH, lead-free, halogen-free, and conflict-minerals status must be confirmed from the Analog Devices product documentation or the relevant distributor compliance record. AEC-Q100 is not applicable because the ADC is not presented as an automotive-qualified device.
