AD976CR - 16-Bit 100 kSPS SAR ADC | Analog Devices
Référence : AD976CR ✓ ActifAD976CR Présentation
A successive-approximation ADC, or SAR ADC, is a sampling data-converter type that successively compares the sampled input voltage with a controlled reference and produces one digital bit per comparison cycle. Within the broader data-conversion hierarchy, the AD976CR belongs to the ADC and data-acquisition IC category, where its combination of 16-bit resolution, 100 kSPS throughput, and parallel output provides a practical balance between conversion speed, accuracy, interface simplicity, and power consumption.
Key features include 16-bit resolution, 100 kSPS operation for the AD976 version, single 5 V supply operation, an internal 2.5 V reference, a high-speed parallel interface, and low-power operation. The parallel interface exposes the converted code directly on digital output pins, making it suitable for systems in which the receiving logic can capture data at the converter's supported rate. The AD976 family also permits use of an external reference when greater reference control is required.
The AD976CR uses a switched-capacitor SAR conversion architecture. Its on-chip clock supports the digital conversion sequence, while the parallel output avoids requiring a serial link in the immediate sampling path. This architecture is appropriate for industrial control, instrumentation, communications, and embedded measurement systems that require deterministic sampling and moderate throughput without the complexity of a high-speed pipeline or flash ADC.
Typical uses include industrial process monitoring, laboratory data acquisition, communications equipment, digital instrumentation, and embedded control systems. For audio, communications, or precision measurement, engineers should review the manufacturer's complete data sheet for input bandwidth, settling behavior, reference requirements, and source-impedance limitations before fixing the sampling architecture.
When designing around the AD976CR, allow adequate settling time for the source network and external reference, preserve the required analog and digital return paths, and use a low-noise 5 V supply. The 28-lead SOIC footprint supports conventional surface-mount assembly, but high-speed layout still demands short traces and careful separation between analog input, reference, and digital output nets.
This product record combines the verified manufacturer overview, distributor identification, pricing references, and practical engineering guidance in one searchable reference. It also distinguishes confirmed AD976CR characteristics from unverified parameters so engineers can identify what must be checked against the official datasheet before design release.
Alternatives de remplacement direct pour AD976CR — 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 AD976CR (même facteur de forme et même empreinte) — différant par Architecture, Output Interface, Package, Supply Voltage.
AD976CRZ
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Voir la fiche technique →AD976CR Valeurs maximales et caractéristiques électriques
| ADC Type | Successive Approximation (SAR) |
| Résolution | 16 bit |
| Throughput Rate | 100 kSPS |
| Architecture | Switched-capacitor SAR ADC |
| Tension d'alimentation | 5 V |
| Number of Inputs | 1 input |
| Internal Reference Voltage | 2.5 V |
| Reference Selection | Internal or external reference |
| Output Interface | High-speed parallel interface |
| Clock | On-chip clock |
| Process Technology | BiCMOS |
| Power Dissipation | 100 mW maximum |
| Boîtier | 28-lead SOIC |
| Type de montage | Surface Mount |
Guide de configuration des broches du AD976CR 28-lead soic
Configuration des broches du AD976CR (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 AD976CR.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
AD976CR convient pour 6 applications: Industrial Process Monitoring, Laboratory Data Acquisition, Communications Receiver, Embedded Control and Instrumentation, Digital Audio Measurement, Digital Oscilloscope and Waveform Capture.
Industrial Process Monitoring
The AD976CR is suitable for process-monitoring systems that require 16-bit conversion data and a deterministic 100 kSPS sampling capability. Its single 5 V analog supply simplifies system power planning, while the parallel interface allows a controller or FPGA to capture each conversion without a serial link. The switched-capacitor SAR architecture supports repeatable sampling, and the internal 2.5 V reference can reduce board complexity when its noise and drift satisfy the measurement specification. The source impedance, input bandwidth, and acquisition timing must be verified against the official data sheet. Maximum power dissipation of 100 mW also makes thermal management straightforward in most compact industrial enclosures.
Recommandé
Laboratory Data Acquisition
The AD976CR can serve as the conversion element in a laboratory instrument that captures analog waveforms at up to 100 kSPS. Its 16-bit resolution provides 65,536 nominal code levels, while the parallel output permits direct connection to digital capture logic. The on-chip clock reduces the number of external timing components, and the internal 2.5 V reference supports compact single-supply designs. For accurate measurements, the analog input network must provide adequate settling, the reference must meet the required noise and drift limits, and the capture system must account for converter latency and acquisition timing.
Recommandé
Communications Receiver
The AD976CR is appropriate for communications equipment that samples a received or processed analog waveform at 100 kSPS and then hands the 16-bit result to digital logic. Its parallel interface supports straightforward interfacing with FPGA or ASIC data registers, and operation from a single 5 V supply simplifies analog power distribution. Designers should verify the required signal bandwidth, input full-scale range, reference stability, and digital logic levels in the application. Keeping parallel data traces short and separating them from sensitive analog-input routing helps preserve measurement integrity and reduces coupling from switching circuitry.
Recommandé
Embedded Control and Instrumentation
The AD976CR can provide a dedicated high-resolution conversion channel in an embedded controller or industrial instrument where 100 kSPS is sufficient. The converter's 28-lead SOIC package is compatible with conventional surface-mount assembly, and its parallel bus allows sampled values to enter an FPGA or high-speed microcontroller interface. The single 5 V supply is practical for systems already operating at that rail. Firmware and hardware must accommodate the converter's sampling clock, output latch behavior, and latency. Input filtering and source-impedance calculations should use the manufacturer's recommended network rather than assuming a generic RC value.
Recommandé
Digital Audio Measurement
The AD976CR can be used in audio test equipment where a 16-bit converter operating at 100 kSPS provides sufficient sample rate for many measurement and monitoring tasks. The parallel output simplifies connection to test logic, while the internal 2.5 V reference offers a compact implementation path. Audio-band performance depends on the complete analog front end, reference quality, grounding, and digital-layout discipline rather than nominal resolution alone. Engineers should confirm the AD976CR's listed signal-to-noise and distortion performance under the intended input conditions and ensure that any subsequent switching converter does not inject noise into the reference or analog input path.
Recommandé
Digital Oscilloscope and Waveform Capture
The AD976CR is suitable for the acquisition path of a digital oscilloscope or waveform recorder that samples at up to 100 kSPS. Its 16-bit output provides more nominal resolution than ordinary 8-bit or 12-bit capture systems, while the parallel interface allows rapid transfer into acquisition logic. The internal 2.5 V reference can simplify the converter section, although a high-precision external reference may be preferable for calibration and low-frequency stability. The input driver must provide adequate settling over the full-scale range, and the layout should minimize clock and digital-output crosstalk near the analog node.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour AD976CR — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit |
|---|---|
| Brand | Analog Devices |
| Package | 28-lead SOIC |
| Resolution | 16 bit |
| Throughput Rate | 100 kSPS |
| ADC Architecture | Switched-capacitor successive approximation |
| Supply Voltage | 5 V |
| Internal Reference | 2.5 V |
| Power Dissipation | 100 mW maximum |
| Output Interface | High-speed parallel interface |
| Number of Inputs | 1 input |
Principaux différenciateurs
- Lower confirmed throughput than the related AD976A (vs AD976A)
- Single-supply operation with integrated reference capability (vs AD976A)
- Parallel output simplifies direct digital capture (vs AD976A)
Notes de conception
Route the analog input and reference nets away from the 16-bit parallel output bus and clock signals. Keep the input and reference traces short, use a continuous ground reference plane, and place any input filtering close to the converter. The parallel outputs can create fast edge currents, so returning them directly over sensitive analog traces should be avoided even though the AD976CR itself operates from only a single 5 V supply.
Use a stable 5 V supply and verify the converter's maximum current and settling behavior against the official data sheet before selecting regulators and decoupling. Place the manufacturer's recommended supply capacitors directly beside the appropriate supply and ground pins. Since verified maximum power dissipation is 100 mW, thermal design is normally modest, but reference voltage and input-signal integrity still depend on low-noise supply behavior.
Do not substitute AD976A without reviewing acquisition timing. The AD976A converts at 200 kSPS, twice the AD976CR's 100 kSPS rate, which can change settling requirements, clocking behavior, power consumption, and downstream capture logic. Similarly, the relationship between AD976CR and AD976CRZ does not by itself prove identical packaging or pin compatibility; check the ordering guide and full data sheet before substitution.
Design the input driver to settle to the required accuracy within the AD976CR acquisition interval. Account for source impedance, capacitor tolerance, dielectric behavior, and the converter's input capacitance rather than selecting capacitance from the ADC resolution alone. If using the internal reference, evaluate its noise and temperature behavior against the measurement requirement; use an external reference only when its noise, drift, loading, and startup characteristics are acceptable.
Informations de conformité
The supplied product information confirms a 28-lead SOIC package and BiCMOS construction but does not state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. These fields therefore remain unknown rather than inferred.