AD677JR - 16-Bit 100 kSPS Serial ADC | Analog Devices
Référence : AD677JR ⚠ Dernier achatAD677JR Présentation
A sampling ADC is a category of data-conversion IC that acquires an analog input voltage and converts it into a numeric code for processing, storage, or transmission. The AD677 belongs to the SAR ADC hierarchy, where successive approximation and charge redistribution convert the sampled voltage into a 16-bit digital result. As a precision data-acquisition IC, it provides a defined interface for instrumentation, industrial measurement, and embedded control systems.
Key features include 16-bit resolution, no missing codes, a 1 MHz full-power bandwidth, a signal-to-noise ratio of 99 dB, and total harmonic distortion of 92 dB. Its 100 kSPS maximum throughput supports continuous measurement while keeping the serial output manageable. The analog circuitry operates from +5 V and ±12 V supplies, while the separate digital supply helps reduce digital crosstalk entering the analog conversion path.
The AD677 combines a switched-capacitor sampling stage with on-chip autocalibration. During conversion, the sampled charge is redistributed to resolve a 16-bit code. Autocalibration corrects internal nonlinearities digitally, improving consistency without requiring a continuous external calibration sequence. According to the manufacturer datasheet, the converter typically consumes 450 mW with a 10 V reference and 360 mW with a 5 V reference during conversion.
Typical uses include industrial process monitoring, precision instrumentation, sensor-interface equipment, laboratory measurement systems, and embedded data-acquisition modules. The 100 kSPS rate is appropriate for many slowly varying or periodically sampled analog signals, while the 1 MHz full-power bandwidth supports input signals with higher-frequency content when aliasing and sampling requirements are properly managed.
When implementing the AD677JR, provide the specified analog and digital supplies, reference voltage, clocking, and decoupling arrangements recommended by the manufacturer. Because the converter accepts bipolar analog inputs in a system using ±12 V analog rails, input range, common-mode behavior, and overvoltage protection must be checked against the application rather than inferred solely from resolution and sampling rate.
This page consolidates the verified manufacturer and distributor information for the AD677JR, clarifies its last-time-buy lifecycle status, identifies same-family drop-in candidates requiring temperature-grade verification, and adds practical selection and design guidance not presented as a single table in the manufacturer datasheet.
Alternatives de remplacement direct pour AD677JR — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec AD677JR (même facteur de forme et même empreinte) — différant par Architecture, Total Harmonic Distortion.
AD677KR
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →AD677JRZ
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
AD677KRZ
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
AD677JR Valeurs maximales et caractéristiques électriques
| Résolution | 16 bit |
| Fréquence d'échantillonnage | 100 kSPS |
| Conversion Time | 10 us |
| Number of Input Channels | 1 channel |
| Architecture | SAR ADC with switched-capacitor charge redistribution |
| Input Type | Single-ended analog input |
| Output Interface | Serial, 16 bit |
| Signal-to-Noise Ratio | 99 dB |
| Total Harmonic Distortion | 92 dB |
| Full-Power Bandwidth | 1 MHz |
| Missing Codes | No missing codes |
| Sample-and-Hold Function | Autocalibrating on-chip sample-and-hold |
| Analog Supply Voltage | +5 V and ±12 V |
| Power Consumption | 450 mW typical with a 10 V reference; 360 mW typical with a 5 V reference during conversion |
| Boîtier | 28-lead SOIC |
| Type de montage | Surface mount |
Guide de configuration des broches du AD677JR 28-lead soic
Configuration des broches du AD677JR (boîtier 28-lead soic). Ce composant analogique comporte des broches d'entrée, de sortie et d'alimentation. Consultez la fiche technique du fabricant pour les configurations des broches d'annulation d'offset, de compensation et d'activation. Idéal pour le conditionnement de signaux et les circuits amplificateurs.
Aucune donnée de brochage détaillée disponible pour AD677JR.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
AD677JR convient pour 6 applications: Industrial Process Monitoring, Precision Sensor Signal Conditioning, Laboratory Measurement Equipment, Data Acquisition Modules, Medical Monitoring Equipment, Communication and Control Systems.
Industrial Process Monitoring
The AD677JR fits legacy industrial process-monitoring systems that require a 16-bit measurement result at up to 100 kSPS. Its 99 dB SNR, 92 dB THD, and no-missing-code performance provide useful resolution for pressure, temperature, flow, and level signals after suitable conditioning. The switched-capacitor SAR architecture converts each sampled input in a stated 10 microsecond total conversion time, while autocalibration corrects internal nonlinearities. A practical design places the conditioned sensor signal through protection and filtering before the ADC, uses the specified +5 V and ±12 V analog supplies, and separates the digital supply to reduce crosstalk. Because AD677JR is LAST TIME BUY and its commercial temperature grade may be insufficient for harsh environments, verify the operating-temperature rating and consider AD677KR when the same 100 kSPS performance is required across a wider industrial temperature range.
Recommandé
Precision Sensor Signal Conditioning
AD677JR is appropriate for precision sensor interfaces that convert slowly varying or periodically sampled voltages into 16-bit digital data. Its 100 kSPS maximum rate provides ample throughput for many temperature, pressure, strain, and chemical sensors after amplification and filtering. The 1 MHz full-power bandwidth gives the analog front end useful bandwidth for signal content beyond the primary measurement rate, although an anti-alias filter remains necessary. On-chip sample-and-hold and autocalibration reduce the burden on system calibration, and the 10 microsecond conversion time allows repeated acquisitions. The primary engineering consideration is matching the sensor output to the ADC input range and reference voltage, neither of which is fully quantified in the supplied excerpts. Confirm those limits from the manufacturer datasheet, provide stable reference and decoupling components, and validate gain and offset errors in the completed signal chain.
Recommandé
Laboratory Measurement Equipment
The AD677JR can serve as the acquisition converter in laboratory instruments that sample bipolar or conditioned analog waveforms at up to 100 kSPS. Its 16-bit resolution, 99 dB SNR, and 92 dB THD support precision measurement while the serial interface simplifies connection to an embedded controller. For instruments handling repetitive waveform measurements, the stated 1 MHz full-power bandwidth can preserve higher-frequency information, but designers must apply an appropriate anti-alias filter and sample-rate margin. Autocalibration corrects internal nonlinearities and can improve repeatability without an external calibration routine. The AD677JR requires +5 V and ±12 V analog supplies plus a digital supply, so system partitioning and grounding are important in a sensitive bench instrument. Verify reference-voltage stability, input range, clock jitter, and missing-code behavior during design validation before replacing the legacy part in new production.
Recommandé
Data Acquisition Modules
AD677JR is well suited to legacy standalone data-acquisition modules that require one analog channel with relatively high precision. The converter can deliver one 16-bit result every 10 microseconds under its stated operating conditions, supporting continuous sampling of slowly changing or controlled periodic waveforms. Its separate digital and analog supply arrangement is beneficial in multichannel expansion boards because it helps contain digital switching noise in the measurement path. The system should place the input filter, protection network, reference, and bypass capacitors close to the ADC according to the manufacturer layout guidance. Host communication can use the serial output with an embedded microcontroller such as the listed STM32F429 device. Before production adoption, engineers should confirm the exact input range, clock requirements, and timing relationship between sample command and serial output from the AD677 datasheet, then evaluate lifecycle risk associated with a LAST TIME BUY converter.
Recommandé
Medical Monitoring Equipment
The AD677JR can be used in legacy medical monitoring modules for low-bandwidth analog channels that require 16-bit quantization and controlled conversion time. The 100 kSPS rate is suitable for many physiological pressure, flow, or resistance-derived signals after conditioning, while 99 dB SNR supports high-resolution recording. Because medical equipment also imposes isolation, safety, and qualification requirements that are not supplied for this ADC, using AD677JR does not by itself establish compliance. Designers must evaluate the complete signal chain, isolation boundary, input protection, reference stability, and applicable medical standards. The AD677JR's separate digital supply can help reduce crosstalk, but PCB partitioning and grounding remain essential. For new medical designs, check the operating-temperature grade, availability, and whether a currently supported converter family offers a safer long-term procurement path than this last-time-buy device.
Recommandé
Communication and Control Systems
AD677JR is applicable to legacy communication and control equipment that must digitize one analog feedback channel and transfer the result through a serial interface. A 100 kSPS conversion rate provides responsive feedback for many control loops, while the 10 microsecond conversion time leaves room for interface and processing overhead. The converter's 16-bit code and 99 dB SNR can preserve small changes in a conditioned feedback signal. System designers should treat the ADC clock and serial readout as part of a deterministic acquisition loop, accounting for input latency, filtering, and the host controller's processing time. Stable reference and supply arrangements are particularly important when the feedback value influences actuator commands. The AD677JR is marked LAST TIME BUY, so new control-system designs should also consider whether legacy availability, commercial temperature limits, and end-of-life notification risk outweigh the convenience of retaining an existing 28-SOIC footprint.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour AD677JR — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | AD677KR | AD677JRZ | AD677KRZ |
|---|---|---|---|---|
| Package | 28-lead SOIC | 28-lead SOIC | 28-lead SOIC | 28-lead SOIC |
| 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 |
| Conversion Time | 10 us | 10 us | 10 us | 10 us |
| Architecture | Switched-capacitor charge-redistribution SAR | Switched-capacitor charge-redistribution SAR | Switched-capacitor charge-redistribution SAR | Switched-capacitor charge-redistribution SAR |
| Signal-to-Noise Ratio | 99 dB | 99 dB | 99 dB | 99 dB |
| Total Harmonic Distortion | 92 dB | 92 dB | 92 dB | 92 dB |
| Full-Power Bandwidth | 1 MHz | 1 MHz | 1 MHz | 1 MHz |
Principaux différenciateurs
- 100 kSPS conversion throughput with 16-bit resolution (vs AD677KR)
- Factory-corrected nonlinearities through on-chip autocalibration (vs AD677JRZ)
- Separate analog and digital supply arrangement (vs AD677KRZ)
Notes de conception
The Analog Devices product page states typical conversion power of 450 mW with a 10 V reference and 360 mW with a 5 V reference. The AD677 also requires +5 V and ±12 V analog supplies plus a separate digital supply. Follow the manufacturer supply-decoupling and layout guidance, keep analog and digital return currents separated, and verify the complete power budget under the intended sampling duty cycle rather than relying on a single typical power figure.
The stated 1 MHz full-power bandwidth is substantially higher than the 100 kSPS conversion rate, so the input path can contain significant frequency content above the sample rate. Use a properly designed anti-alias filter before the ADC and evaluate its attenuation, phase response, and settling behavior against the required acquisition bandwidth. Do not assume that the 1 MHz figure removes the need for filtering or permits an unrestricted input slew rate.
Do not substitute AD677JR solely because another AD677 suffix also uses a 28-lead SOIC package. The verified evidence establishes matching resolution and conversion rate, but it does not provide every numerical temperature limit, reference requirement, input-range condition, or suffix-specific qualification. Download the current Analog Devices AD677 datasheet, compare the full ordering table, and verify the exact pin configuration, temperature grade, reference voltage, and lifecycle status before production substitution.
Informations de conformité
The supplied verified web data does not explicitly state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. AEC-Q100 is not applicable because AD677JR is an ADC rather than an automotive-qualified device. Lifecycle status is LAST TIME BUY according to the Analog Devices product page.