AD977ABN - 16-Bit 100 kSPS Serial ADC | Analog Devices
Teilenummer: AD977ABN ✓ AktivAD977ABN Übersicht
An ADC is an analog-to-digital converter, a mixed-signal semiconductor that transforms continuous voltage signals into digital codes. ADCs are used within measurement, control, communication, and instrumentation systems to place analog sensor or conditioning outputs into a form that can be processed by a microcontroller, DSP, or other digital logic. The AD977ABN belongs to the high-speed ADC category and combines a 16-bit resolution with a 100 kSPS sampling rate.
The AD977 family includes the AD977 and AD977A versions. The AD977 provides a 100 kSPS throughput rate, while the AD977A provides a 200 kSPS throughput rate. Both families operate from a single 5 V supply and use a serial I/O architecture. The AD977ABN also supports power-down operation, reducing power dissipation to 50 W during the stated power-down condition described by the manufacturer documentation.
The converter's switched-capacitor architecture supports external reference and input-range configuration. The available family information identifies unipolar ranges of 0 to 5 V and 0 to 4 V, along with bipolar ranges of plus or minus 5 V and plus or minus 3.3 V. The input range selection therefore determines the analog signal span that the converter maps to its 16-bit output codes.
Typical uses include industrial process measurement, instrumentation, data acquisition, communications, and embedded control systems. A serial interface reduces the number of signal connections required on the PCB, while the 16-bit resolution is useful when the captured signal requires more dynamic range than a lower-resolution converter. The AD977ABN can also serve as a functional building block in measurement systems requiring programmable analog input ranges and controlled shutdown behavior.
When designing a board around the AD977ABN, verify the exact input range, reference voltage, digital interface timing, and power-supply sequencing against the manufacturer datasheet. Keep analog input routing short and away from high-current digital paths, place bypass capacitors close to the supply pins, and use a clean reference source when high conversion repeatability is required. Because this is a 100 kSPS SAR converter, the circuit must also account for acquisition time, source impedance, and the required sampling interval.
This product page combines the manufacturer family specifications, exact AD977ABN conversion and package details, pricing structure, and practical engineering guidance. The comparison and selection material highlights how throughput, input range, package format, and interface requirements affect replacement decisions for 16-bit serial ADCs.
Drop-in-Alternativen für AD977ABN – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit AD977ABN (gleiche Bauform und Footprint) – abweichend in Architecture, Interface, Internal Reference, Package.
AD977ACN
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
AD977AANZ
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
AD977ABN Grenzwerte & elektrische Eigenschaften
| Converter Type | Successive-approximation ADC |
| Auflösung | 16 bit |
| Throughput Rate | 100 kSPS |
| Input Type | Single-ended |
| Architecture | BiCMOS switched-capacitor ADC |
| Versorgungsspannung | 5 V single supply |
| Power Dissipation | 100 mW maximum |
| Power-Down Mode | 50 W |
| Unipolar Input Range | 0 to 5 V or 0 to 4 V |
| Bipolar Input Range | +/-5 V or +/-3.3 V |
| Schnittstelle | Serial I/O |
| Gehäuse | 20-pin PDIP |
| Montageart | Through-hole |
| Internal Reference | 2.5 V internal reference |
AD977ABN 20-pin pdip Pinbelegungsleitfaden
Pinbelegung für AD977ABN (20-pin pdip-Gehäuse). Dieses analoge Bauteil verfügt über Eingangs-, Ausgangs- und Versorgungspins. Offset-Null-, Kompensations- und Enable-Pin-Konfigurationen entnehmen Sie dem Herstellerdatenblatt. Ideal für Signalaufbereitung und Verstärkerschaltungen.
Keine detaillierten Pinbelegungsdaten verfügbar für AD977ABN.
Siehe die Datenblatt für die vollständige Pin-Konfiguration.
Typische Anwendungen
AD977ABN ist geeignet für 6 Anwendungs: Industrial Process Measurement, Data Acquisition Systems, Laboratory Instrumentation, Communications and Baseband Measurement, Embedded Control and Monitoring, Power and Motor Control Feedback.
Industrial Process Measurement
The AD977ABN suits industrial process-measurement channels that require 16-bit resolution at up to 100 kSPS. Its supported 0 to 5 V, 0 to 4 V, plus or minus 5 V, and plus or minus 3.3 V input configurations accommodate many standardized sensor signals. Place the converter behind an input filter and settling network, then use its serial interface to transfer codes to a controller. The 100 kSPS rate provides useful temporal resolution for flow, level, pressure, and laboratory measurement channels while maintaining a manageable serial-data footprint.
Empfohlen
Data Acquisition Systems
AD977ABN can form the conversion stage of a compact data-acquisition system that collects bipolar or unipolar sensor outputs at 100 kSPS. The serial interface reduces the number of traces needed between converter and controller, leaving board space for analog conditioning and protection. Designers should select an acquisition interval longer than the complete sample-and-hold cycle and verify input settling with the actual source impedance. A stable reference and short ground-return paths are especially important when extracting the full benefit of 16-bit resolution.
Empfohlen
Laboratory Instrumentation
The AD977ABN is appropriate for laboratory instruments that digitize analog waveforms or sensor outputs while balancing resolution against acquisition speed. A 16-bit converter preserves fine amplitude detail, and the 100 kSPS rate supports measurement beyond very slow instrumentation. The selected input range must remain inside the converter's configured span, while the front end must provide adequate bandwidth and low distortion. Use a clean reference, controlled grounding, and shielded analog routing to prevent the converter from resolving interference generated elsewhere on the board.
Empfohlen
Communications and Baseband Measurement
AD977ABN can serve as the ADC in communications, baseband, or modulation-quality measurement equipment where a 100 kSPS serial converter is adequate. The input-conditioning path can attenuate or scale the RF-derived signal into one of the supported unipolar or bipolar ranges. Because the converter uses a successive-approximation architecture, each conversion requires acquisition and settling time; the source network and clocking must therefore preserve the specified timing. A carefully referenced analog section helps prevent gain or offset errors from being mistaken for signal defects.
Empfohlen
Embedded Control and Monitoring
AD977ABN is useful in embedded monitoring equipment that must convert a continuously changing analog condition into digital data for a microcontroller or DSP. Its serial I/O supports compact board layouts, while the selectable input ranges accommodate voltage sensors and conditioned transducer outputs. The system should use the power-down function during idle periods to reduce consumption and wake the converter before the next acquisition. Firmware must also respect startup, conversion-complete, and data-read timing so that the ADC is not sampled before a valid conversion result is available.
Empfohlen
Power and Motor Control Feedback
AD977ABN can digitize scaled feedback signals in power-conversion or motor-control systems where feedback monitoring benefits from 16-bit resolution. The converter's single 5 V operation and serial interface are convenient in compact control boards, while its multiple input ranges allow the feedback amplifier to use familiar signal levels. Protection and filtering must prevent switching-node transients from overloading the analog input. The control loop should use synchronized sampling when the feedback waveform contains high-frequency components, rather than relying on an asynchronous read that can capture different phase behavior.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für AD977ABN – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | AD977ACN | AD977AANZ |
|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices |
| Package | 20-pin PDIP | 20-pin PDIP | 20-pin PDIP |
| Resolution | 16 bit | 16 bit | 16 bit |
| Throughput Rate | 100 kSPS | 200 kSPS | 200 kSPS |
| Converter Architecture | Successive approximation, switched capacitor | Successive approximation, switched capacitor | Successive approximation, switched capacitor |
| Supply Voltage | 5 V single supply | 5 V single supply | 5 V single supply |
| Interface | Serial I/O | Serial I/O | Serial I/O |
| Internal Reference | 2.5 V | 2.5 V | 2.5 V |
| Input Ranges | 0 to 5 V, 0 to 4 V, +/-5 V, +/-3.3 V | 0 to 5 V, 0 to 4 V, +/-5 V, +/-3.3 V | 0 to 5 V, 0 to 4 V, +/-5 V, +/-3.3 V |
Wichtigste Unterscheidungsmerkmale
- Lower throughput provides a longer conversion interval than the AD977A-family alternatives (vs. AD977ACN)
- AD977-family position supports designs not requiring double-rate conversion (vs. AD977AANZ)
- 16-bit conversion resolution is retained across the identified family alternatives (vs. AD977ACN)
- Common single-supply and serial-interface architecture (vs. AD977AANZ)
Designhinweise
Design the analog input path for proper settling rather than treating the converter input as a high-impedance instantaneous measurement point. Confirm that the external source impedance, filter resistance, capacitor value, and selected input range allow the sample-and-hold network to acquire the required accuracy within the acquisition interval. Place the settling network close to the AD977ABN input pins and keep the return path continuous. This is especially important at 100 kSPS because reducing the sampling interval leaves less time for the internal capacitor to acquire the next conversion.
Route the serial clock, serial data, and control signals away from the analog input and reference nets. Use a compact ground strategy that separates analog return currents from digital switching paths, and place supply bypass capacitors close to the device power pins. The 20-pin PDIP footprint requires adequate hole spacing for the converter leads and surrounding components. Review the manufacturer pin-description table and package drawing before assigning connections; the pin numbering must follow the PDIP orientation rather than a surface-mount AD977 variant.
Decouple the single 5 V supply at the AD977ABN and follow the connection and capacitor recommendations in the manufacturer application circuit. Avoid placing long traces between the bypass capacitor and the converter supply pins, because series trace inductance can create transient voltage disturbance during clock and output transitions. The specified 100 mW maximum power dissipation is a device limit, not a substitute for board-level thermal analysis. If an analog front end, reference, or digital controller runs in the same enclosure, assess total heat and ground coupling at the system level.
Compliance-Informationen
The manufacturer product page and family descriptions do not provide a definitive compliance statement for this ordering code. Check the current Analog Devices product documentation and declaration before procurement or release to production.