AD650SD/883B - V/F & F/V Converter 1MHz | Analog Devices
N.º da peça: AD650SD/883B ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $92.04 | $92,04 |
| 10 | $85.5 | $855,00 |
| 100 | $78 | $7.800,00 |
| 500 | $70 | $35.000,00 |
| 1.000 | $65 | $65.000,00 |
AD650SD/883B Visão geral
A voltage-to-frequency converter (VFC) is an electronic circuit that converts an analog input voltage into a proportional output frequency. This type of converter is widely used in analog-to-digital conversion, where the frequency output can be easily counted by digital logic, providing high resolution and noise immunity. The AD650SD/883B also operates in the reverse mode as a frequency-to-voltage converter, enabling closed-loop control and frequency measurement applications. As a member of the voltage-to-frequency converter family, it bridges the analog and digital domains, offering a simple and robust interface for data acquisition systems.
Key features of the AD650SD/883B include a 1 MHz full-scale frequency, ±0.1% typical nonlinearity, and a wide supply voltage range of ±9V to ±18V. The device offers both single-ended and differential input configurations, and its output is a square wave that can drive TTL or CMOS logic directly. The ceramic package provides excellent thermal stability and hermetic sealing, making it ideal for military and aerospace applications where reliability is critical.
Technically, the AD650SD/883B uses a charge-balancing architecture that ensures high linearity and temperature stability. The input current is integrated over a fixed time period, and the output frequency is proportional to the input voltage. This design minimizes drift and provides excellent long-term stability. The device also includes an internal reference and a precision comparator, reducing the need for external components.
Typical applications include precision analog-to-digital conversion, frequency-to-voltage conversion for tachometers and flow meters, and isolated signal transmission in industrial control systems. The AD650SD/883B is also used in aerospace telemetry and test instrumentation where high accuracy and wide temperature range are required.
When designing with the AD650SD/883B, ensure proper decoupling of the power supply pins with 0.1µF ceramic capacitors placed close to the device. The input signal should be filtered to remove high-frequency noise, and the output frequency should be buffered if driving long cables. The device's power dissipation is moderate, but thermal management is recommended for high-temperature environments.
Alternativas drop-in para AD650SD/883B — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
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AD650SD/883B Classificações máximas e características elétricas
| Converter Type | Voltage-to-Frequency / Frequency-to-Voltage |
| Maximum Frequency | 1 MHz |
| Nonlinearity | ±0.1% typical |
| Supply Voltage Range | ±9V to ±18V |
| Faixa de tensão de entrada | 0V to +10V (single-ended) |
| Tipo de saída | Square wave, TTL/CMOS compatible |
| Faixa de temperatura de operação | -55°C to +125°C |
| Package Type | 14-pin CDIP (Ceramic DIP) |
| Tipo de montagem | Through Hole |
| Power Dissipation | 150 mW typical |
| Input Impedance | 10 kΩ typical |
| Output Frequency Range | 0 Hz to 1 MHz |
| Temperature Coefficient | ±50 ppm/°C typical |
| Status RoHS | Non-compliant (military grade) |
| Military Grade | Yes (883B compliant) |
Configuração de pinos do AD650SD/883B
| Pino 1 | V+ — Positive supply voltage |
| Pino 2 | IN — Analog input voltage |
| Pino 3 | GND — Ground |
| Pino 4 | OUT — Frequency output |
| Pino 5 | NC — No connection |
| Pino 6 | NC — No connection |
| Pino 7 | V- — Negative supply voltage |
| Pino 8 | NC — No connection |
| Pino 9 | NC — No connection |
| Pino 10 | NC — No connection |
| Pino 11 | NC — No connection |
| Pino 12 | NC — No connection |
| Pino 13 | NC — No connection |
| Pino 14 | NC — No connection |
Aplicações típicas
AD650SD/883B é adequado para 6 aplicaçãos: Precision Analog-to-Digital Conversion, Frequency-to-Voltage Conversion for Tachometers, Isolated Signal Transmission, Aerospace Telemetry, Test and Measurement Instrumentation, Industrial Process Control.
Precision Analog-to-Digital Conversion
The AD650SD/883B converts analog voltage signals into a frequency output that can be counted by digital logic, providing high-resolution ADC with excellent noise immunity. Its 1 MHz full-scale frequency and ±0.1% nonlinearity ensure accurate conversion for industrial and aerospace data acquisition systems. The wide temperature range allows operation in harsh environments, and the charge-balancing architecture minimizes drift over time.
Recomendado
Frequency-to-Voltage Conversion for Tachometers
In tachometer applications, the AD650SD/883B converts the frequency output of a speed sensor into a proportional voltage for display or control. Its high accuracy and temperature stability ensure reliable speed measurement in automotive and industrial engines. The device's ability to operate in F/V mode with the same precision makes it a versatile solution for rotational speed monitoring.
Recomendado
Isolated Signal Transmission
The AD650SD/883B is ideal for isolated signal transmission in industrial control systems. By converting a voltage signal to frequency, it can be transmitted across an isolation barrier using optocouplers or transformers, then converted back to voltage at the receiving end. This method provides high noise immunity and galvanic isolation, essential for safety in high-voltage environments.
Recomendado
Aerospace Telemetry
In aerospace telemetry, the AD650SD/883B is used to convert sensor signals into frequency for transmission over long distances. Its military-grade temperature range and MIL-STD-883B compliance ensure reliable operation in extreme conditions. The device's high accuracy and low drift are critical for maintaining data integrity in flight test and satellite applications.
Recomendado
Test and Measurement Instrumentation
The AD650SD/883B is used in precision test equipment such as digital multimeters and frequency counters. Its ability to convert voltage to frequency with high linearity enables accurate measurement of analog signals. The wide supply voltage range and robust design make it suitable for benchtop and portable instruments.
Recomendado
Industrial Process Control
In industrial process control, the AD650SD/883B converts transducer outputs (e.g., temperature, pressure) into frequency signals that are immune to noise and can be easily interfaced with digital controllers. Its high accuracy and stability ensure precise control in manufacturing and chemical processing. The device's wide temperature range allows use in harsh plant environments.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para AD650SD/883B — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | AD650SD | AD650AD | AD650BD |
|---|---|---|---|---|
| Package | 14-CDIP | 14-CDIP | 14-CDIP | 14-CDIP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Maximum Frequency | 1 MHz | 1 MHz | 1 MHz | 1 MHz |
| Nonlinearity | ±0.1% | ±0.1% | ±0.1% | ±0.1% |
| Supply Voltage Range | ±9V to ±18V | ±9V to ±18V | ±9V to ±18V | ±9V to ±18V |
| Operating Temperature Range | -55°C to +125°C | -55°C to +125°C | -25°C to +85°C | -25°C to +85°C |
| Military Grade | Yes (883B) | No | No | No |
| RoHS Compliance | Non-compliant | Non-compliant | Non-compliant | Non-compliant |
Principais diferenciais
- Military-grade screening (MIL-STD-883B) (vs AD650SD)
- Extended temperature range (vs AD650AD)
- Same package and pinout (vs AD650SD)
Notas de projeto
The AD650SD/883B requires dual supplies of ±9V to ±18V. Use 0.1µF ceramic capacitors close to the V+ and V- pins to decouple high-frequency noise. A 10µF tantalum capacitor on each supply is recommended for low-frequency stability.
For optimal performance, keep the input signal path short and shielded. Use a ground plane to minimize noise pickup. The output frequency signal should be buffered if driving long cables to prevent reflections.
Do not exceed the absolute maximum supply voltage of ±18V. Ensure the input voltage does not exceed the specified range to avoid damage. The device is not RoHS compliant, so handle according to military specifications.
Informações de conformidade
Military-grade component, not RoHS compliant. No AEC-Q100 qualification as it is not an automotive part.
