AD977CR - 16-Bit 100 kSPS Serial ADC | Analog Devices
N.º de pieza: AD977CR ✗ Fin de vidaAD977CR Descripción general
Alternativas directas para AD977CR — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con AD977CR (mismo factor de forma y huella) — difiere en Supply Voltage, Throughput Rate.
AD977AR
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Ver hoja de datos →AD977CR Valores máximos y características eléctricas
| Converter Type | Successive-approximation ADC |
| Resolución | 16 bit |
| Throughput Rate | 100 kSPS |
| Tensión de alimentación | 5 V |
| Power Dissipation | 100 mW maximum |
| Input Voltage Range, Unipolar | 0 V to 5 V or 0 V to 4 V |
| Input Voltage Range, Bipolar | +/-5 V or +/-3.3 V |
| Output Interface | Serial |
| Encapsulado | 20-pin SOIC |
| Package Material | Ceramic |
| Packaging | Tube |
| Power-Down Mode | Available |
| Tipo de montaje | Surface mount |
| Analog Input Type | Single-ended or differential, selectable through external circuitry |
Guía de configuración de pines de AD977CR ceramic
Configuración de pines para AD977CR (encapsulado ceramic). Este componente analógico presenta pines de entrada, salida y alimentación. Consulte la hoja de datos del fabricante para conocer las configuraciones de los pines de ajuste de offset, compensación y habilitación. Ideal para circuitos de acondicionamiento de señal y amplificadores.
No hay datos detallados de patillaje disponibles para AD977CR.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
AD977CR es adecuado para 6 aplicacións: Industrial Process Data Acquisition, Precision Instrumentation, Communications Signal Monitoring, Audio and Vibration Analysis, Embedded Control and Monitoring, Power and Energy Monitoring.
Industrial Process Data Acquisition
The AD977CR fits industrial process-measurement systems that require 16-bit conversion at up to 100 kSPS from a single 5 V supply. Its supported unipolar 0–5 V and 0–4 V input ranges can be used with conditioned pressure, temperature, and position sensors, while bipolar ±5 V or ±3.3 V configurations support bipolar sensor outputs. The converter provides one sample every 10 microseconds at its stated throughput. Its 100 mW maximum power dissipation and power-down mode also help manage thermal demand in compact acquisition hardware. The application requires careful reference and input-network layout, plus confirmation of the exact operating-temperature grade before deployment.
Recomendado
Precision Instrumentation
The AD977CR is appropriate for precision laboratory and test instruments where 16-bit resolution is useful but 100 kSPS is sufficient for the measurement bandwidth. A single 5 V supply simplifies system power planning, and the available 0–4 V unipolar range can accommodate suitable front-end outputs without bipolar conversion circuitry. At 100,000 samples per second, the converter can represent waveforms or rapidly acquired measurement sequences while keeping power dissipation at or below the stated 100 mW maximum. Designers should place the input network, reference, and converter on a clean analog section of the PCB, and verify accuracy-related specifications such as SNR and integral nonlinearity in the manufacturer datasheet.
Recomendado
Communications Signal Monitoring
The AD977CR can be used in communications monitoring equipment when the required signal bandwidth is compatible with a 100 kSPS sampling rate. Its 16-bit resolution preserves fine amplitude detail in received or baseband signal measurements, while the 5 V supply and serial interface suit compact embedded acquisition cards. The 0–5 V unipolar range supports many standardized analog monitoring outputs, and the ±3.3 V bipolar option can serve suitable centered signals. Engineers must ensure aliasing is controlled before the ADC input and must keep switching-node and communication-interface returns separated from the sensitive analog path. The AD977CR is better suited to monitoring than to high-bandwidth communications waveform capture.
Recomendado
Audio and Vibration Analysis
The AD977CR is suitable for selected audio, vibration, and condition-monitoring channels where a 100 kSPS ceiling is acceptable. Its 16-bit resolution provides substantially more amplitude detail than lower-resolution general-purpose converters, while the single 5 V operation simplifies portable or embedded test equipment. For a 10 kHz input bandwidth, the 100 kSPS rate provides a basic factor-of-10 oversampling margin before considering the filter and antialiasing requirements. The selected input network must preserve signal integrity and reject out-of-band energy, while power-down mode can reduce consumption during inactive intervals. Engineers should verify noise, distortion, and frequency-response specifications directly from the family datasheet.
Recomendado
Embedded Control and Monitoring
The AD977CR can serve as an analog front end in embedded control systems that monitor slow or medium-bandwidth sensor channels. Its 100 kSPS rate offers more temporal resolution than required by many temperature, level, and actuator-feedback systems, while 16-bit resolution improves representation of small sensor changes. The 5 V supply operation and 100 mW maximum dissipation allow integration into compact control electronics, provided the board has adequate thermal margin. A practical design can use power-down mode during idle intervals and external circuitry for input-range translation. Firmware and system timing must account for the serial conversion process, and the ADC's exact acquisition timing should be checked in the manufacturer documentation.
Recomendado
Power and Energy Monitoring
The AD977CR can be used in power-monitoring equipment that samples scaled voltage or current signals with 16-bit resolution and 100 kSPS throughput. Its unipolar 0–5 V and 0–4 V ranges are compatible with appropriately conditioned outputs from current transformers, dividers, or analog front ends. The sampling interval of 10 microseconds provides a practical basis for calculating RMS, peak, and power calculations in the downstream controller. The converter's 100 mW maximum dissipation is suitable for compact monitoring modules, although accuracy depends on the external gain and reference network. PCB layout should minimize ground drops across the analog input path and keep high-current switching loops physically separate from the converter and its reference.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para AD977CR — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | AD977AR |
|---|---|---|
| Package | 20-pin SOIC | 20-pin SOIC |
| Brand | Analog Devices | Analog Devices |
| Resolution | 16 bit | 16 bit |
| Throughput Rate | 100 kSPS | 100 kSPS |
| Supply Voltage | 5 V | 5 V |
| Output Interface | Serial | Serial |
Diferenciadores clave
- Uses the 100 kSPS AD977 performance level (frente a AD977A family)
- Provides 16-bit conversion from a single 5 V supply (frente a AD976BRZ)
- Offers four documented input-range choices (frente a AD677KRZ)
Notas de diseño
Keep the AD977CR input network, reference connection, and analog return path close to the converter while separating them from digital clock and serial-data routing. Use the manufacturer reference and input-range circuit as the layout baseline because component values and topology are not present in the supplied data. A single 5 V supply may require local bypass capacitors and a low-impedance return plane to prevent supply ripple from appearing as conversion error.
The 100 kSPS conversion rate must be treated together with the front-end bandwidth rather than as a substitute for an anti-aliasing filter. Confirm the required input bandwidth, settle time, and acquisition behavior in the AD977 family datasheet before selecting the filter. Route the serial output away from the analog input and reference nodes, use a continuous ground reference under the device, and verify timing margins for the connected controller or programmable logic.
The verified maximum power dissipation is 100 mW, but actual system heat depends on supply voltage, conversion activity, and the selected operating mode. Provide a stable 5 V rail and use power-down mode when continuous conversion is unnecessary. Do not calculate analog headroom or external-component values without the exact input-range circuit from the manufacturer datasheet, since the verified excerpts do not provide the required resistor values or reference level.
Do not assume that AD977BRZ, AD977ABRZ, AD976BRZ, or AD677KRZ is a drop-in replacement merely because a comparison page lists 20 pins. Verify package dimensions, pin names, exposed connections, supply requirements, input ranges, conversion timing, and temperature grade against the manufacturer documents. The verified search results do not establish enough information to claim those parts are pin-to-pin compatible with the AD977CR.
Información de cumplimiento
The supplied verified data does not explicitly state compliance for the AD977CR. A separate comparison listing mentions RoHS and REACH information for AD977ABRZ, but that statement is not transferred to the AD977CR.