AD977BRZ - 16-Bit 100 kSPS SAR ADC | Analog Devices
N.º da peça: AD977BRZ ✗ Fim de vidaAD977BRZ Visão geral
An ADC is an interface component that converts a continuously varying analog voltage into a numeric value for processing, measurement, display, or control. The AD977 belongs to the successive-approximation, or SAR, ADC family. SAR converters compare the input against successive trial values, making this architecture suitable for medium-speed data acquisition, industrial measurement, communication equipment, and embedded instrumentation. Within the broader hierarchy, the AD977 is an ADC, then a data-conversion IC, and finally a semiconductor or analog-to-digital converter.
The AD977BRZ provides a 16-bit conversion result, 100 kSPS throughput, and operation from one 5 V supply. Its internal 2.5 V reference reduces the external component count, while the serial interface supports compact board layouts. The 20-pin SOIC package uses surface-mount assembly and is available from distributors including DigiKey, Mouser, LCSC, Win Source, and Octopart.
Technically, the converter uses a switched-capacitor successive-approximation architecture. The internal reference establishes the conversion scale, and the factory calibration is intended to improve offset and linearity performance. Because this is a medium-speed SAR converter rather than a flash or pipeline ADC, it provides a practical balance among throughput, resolution, power consumption, and implementation complexity for precision acquisition systems.
Typical uses include precision process measurement, laboratory and test instrumentation, communications equipment, and embedded control systems. The 100 kSPS rate permits acquisition of relatively slow or medium-bandwidth signals, while the 16-bit resolution preserves fine amplitude detail. The serial interface can also reduce the number of parallel data paths when board space is constrained.
Designers should verify the analog input range, acquisition timing, reference behavior, and serial-interface timing against the manufacturer datasheet before finalizing signal-chain calculations. Input buffering, source impedance, sampling-capacitor settling, digital grounding, and decoupling remain important even though the converter integrates reference and conversion circuitry.
This product record combines verified manufacturer and distributor data with an honest drop-in assessment. It distinguishes the electrically compatible AD977CR option from broader functional substitutes, documents unavailable pricing and pinout details, and highlights the practical design information needed to choose and implement a 16-bit SAR ADC without treating similar converters as automatic PCB replacements.
Alternativas drop-in para AD977BRZ — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com AD977BRZ (mesmo formato e footprint) — diferindo em Package, Converter Type, Supply Voltage, Power-Down Mode, RoHS Status.
AD977CR
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
AD977BRZ Classificações máximas e características elétricas
| Converter Type | Successive-approximation ADC (SAR) |
| Resolução | 16 bit |
| Taxa de amostragem | 100 kSPS |
| Number of Inputs | 1 input |
| Tensão de alimentação | 5 V |
| Internal Reference Voltage | 2.5 V |
| Tipo de interface | High-speed serial interface |
| Encapsulamento | 20-SOIC |
| Tipo de montagem | Surface mount |
| Temperature Grade | Industrial |
| Factory Calibration | Factory calibrated to minimize linearity error |
| Status RoHS | Compliant |
| Lead-Free Status | Yes |
Guia de Configuração de Pinos do AD977BRZ 20-soic
Configuração de pinos para AD977BRZ (pacote 20-soic). Este componente analógico possui pinos de entrada, saída e alimentação. Consulte o datasheet do fabricante para configurações de offset null, compensação e pino de enable. Ideal para circuitos de condicionamento de sinal e amplificadores.
Nenhum dado detalhado de pinagem disponível para AD977BRZ.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
AD977BRZ é adequado para 6 aplicaçãos: Industrial Process Measurement, Laboratory and Test Instrumentation, Communications Signal Acquisition, Embedded Data-Acquisition Systems, Precision Control Feedback, Medical and Diagnostic Monitoring.
Industrial Process Measurement
The AD977BRZ fits medium-speed industrial process measurement because it combines 16-bit resolution with a 100 kSPS conversion rate and operation from one 5 V supply. Its internal 2.5 V reference reduces the number of external reference components, while factory calibration is intended to minimize linearity error according to Analog Devices. Place the converter at the end of a conditioned 0-to-5 V process signal, with an input driver that limits source impedance and controls bandwidth. The principal benefit is a compact acquisition path that preserves fine amplitude detail without requiring a flash converter. The main design consideration is acquisition time: the source impedance, external sample network, and settling behavior must be verified from the datasheet before selecting filter and amplifier bandwidths.
Recomendado
Laboratory and Test Instrumentation
The AD977BRZ is appropriate for laboratory and test instrumentation that benefits from 16-bit measurement resolution but does not require conversion rates above 100 kSPS. The Analog Devices AD977 family operates from a single 5 V supply and includes an internal 2.5 V reference, simplifying the power and reference arrangement around an instrument front end. Its high-speed serial interface can reduce parallel routing and save board area in compact instruments. The converter should follow a low-noise input buffer, with grounding and decoupling planned to prevent analog and digital interference. Verify acquisition time and input settling against the measured source impedance, and ensure the controller can support the converter's specified serial timing.
Recomendado
Communications Signal Acquisition
The AD977BRZ can support communications-related signal acquisition when the required conversion rate is near 100 kSPS and 16-bit data resolution is useful. Its high-speed serial interface is suited to compact digital connections to a controller or FPGA, while the single 5 V supply can simplify board-level power planning. The design should separate sensitive analog routing from serial clock and data traces, and the input network should reject out-of-band energy without preventing the required acquisition-time settling. Because the verified information does not state the full input bandwidth, common-mode range, or interface voltage levels, engineers should consult the manufacturer datasheet before confirming suitability for a specific communications waveform.
Recomendado
Embedded Data-Acquisition Systems
The AD977BRZ is suitable for embedded acquisition systems requiring more precision than a lower-resolution converter but only 100 kSPS throughput. Its 16-bit output preserves detail across the measured range, and the internal 2.5 V reference can reduce external reference complexity. A serial connection is valuable in space-constrained embedded boards because it limits wide parallel buses and their associated routing burden. Designers should budget acquisition latency, settle the analog input before each conversion, and select decoupling and grounding that prevent converter activity from contaminating adjacent channels. The supplied data does not provide power consumption or digital interface levels, so controller compatibility and thermal requirements must be confirmed directly from the AD977 documentation.
Recomendado
Precision Control Feedback
The AD977BRZ can be used for precision control feedback when a feedback variable must be digitized with 16-bit resolution and the loop update rate does not exceed the converter's 100 kSPS capability. The single 5 V operating rail and internal 2.5 V reference support a compact analog front end, while factory calibration helps minimize linearity error according to Analog Devices. In a feedback loop, latency from acquisition, conversion, and serial transfer must be included in the controller design. Input filtering should reject high-frequency noise without adding excessive settling delay, and the analog source should maintain the impedance required for accurate acquisition. Verify loop timing and control stability against the actual acquisition chain rather than relying only on the nominal sample rate.
Recomendado
Medical and Diagnostic Monitoring
The AD977BRZ may fit low-bandwidth medical or diagnostic monitoring systems that require 16-bit resolution but can operate at a 100 kSPS conversion rate. The internal 2.5 V reference and single 5 V supply can reduce support-component count, while factory calibration addresses conversion linearity. Such designs still require carefully isolated analog paths, low-noise front ends, and documented safety and compliance validation appropriate to the finished equipment. The verified product information does not identify medical qualification, input range, noise figures, or acquisition timing, so this component should not be assumed compliant for patient-connected use without a system-level risk assessment and complete datasheet review.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para AD977BRZ — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | AD977CR |
|---|---|---|
| Package | 20-SOIC | 20-SOIC - same package |
| Brand | Analog Devices | Analog Devices |
Principais diferenciais
- Direct 100 kSPS sampling rate for the AD977 variant (vs AD977A)
- Single 5 V supply with integrated 2.5 V reference (vs ADS8509IBDWG4)
- Factory-calibrated 16-bit conversion path (vs AD977CR)
Notas de projeto
Place the converter, its input-conditioning components, and supporting bypass capacitors close together on the PCB. Keep analog input routing short and away from the high-speed serial clock and data paths. The verified sources confirm a high-speed serial interface but do not provide complete layout values, so grounding, trace length, and impedance recommendations should be taken from the manufacturer's application guidance before release.
Design the analog front end around the converter's acquisition time and allowable source impedance. The verified data confirms a 100 kSPS SAR architecture and internal 2.5 V reference, but it does not provide the acquisition-time curve or input-range limits. Verify settling requirements with the selected source impedance and filter values rather than treating the nominal sampling rate as the only timing constraint.
Use one regulated 5 V supply and verify the converter's supply-current limits, allowable voltage tolerance, and sequencing requirements from the current AD977 datasheet. The verified information identifies a single 5 V supply but does not provide power-consumption figures. Decoupling should follow the manufacturer values, and the analog and digital return paths should be connected in a way that avoids carrying converter current through sensitive signal ground.
Do not infer full drop-in compatibility from the SOIC-20 package alone. AD977CR is the closest verified same-package candidate, but the supplied data does not confirm its temperature grade, pin functions, interface timing, or all electrical ratings. A valid substitution requires comparison of the AD977 ordering information, complete pinout, input range, reference, sampling rate, and digital timing.
Informações de conformidade
The verified TrustCompo product result describes AD977BRZ as RoHS-compliant, lead-free, and green. No manufacturer-provided RoHS declaration, REACH declaration, AEC-Q100 qualification statement, halogen-free statement, or conflict-minerals documentation was included in the supplied data.
