AD650SD/883B - V/F & F/V Converter 1MHz | Analog Devices
料号： AD650SD/883B ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 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 概述
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.
直接替换替代料： AD650SD/883B ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
AD650SD
✅ 直接替换📋 参考替代料（不在目录中）
AD650AD
✅ 直接替换📋 参考替代料（不在目录中）
AD650BD
✅ 直接替换📋 参考替代料（不在目录中）
AD654JN
⚡ 相同封装 ⚠️ 规格未核验📋 参考替代料（不在目录中）
VFC32KP
⚡ 相同封装 ⚠️ 规格未核验📋 参考替代料（不在目录中）
AD650SD/883B 最大额定值与电气特性
| Converter Type | Voltage-to-Frequency / Frequency-to-Voltage |
| Maximum Frequency | 1 MHz |
| Nonlinearity | ±0.1% typical |
| Supply Voltage Range | ±9V to ±18V |
| 输入电压范围 | 0V to +10V (single-ended) |
| 输出类型 | Square wave, TTL/CMOS compatible |
| 工作温度范围 | -55°C to +125°C |
| Package Type | 14-pin CDIP (Ceramic DIP) |
| 安装类型 | 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 |
| RoHS 状态 | Non-compliant (military grade) |
| Military Grade | Yes (883B compliant) |
AD650SD/883B 引脚配置
| 引脚 1 | V+ — Positive supply voltage |
| 引脚 2 | IN — Analog input voltage |
| 引脚 3 | GND — Ground |
| 引脚 4 | OUT — Frequency output |
| 引脚 5 | NC — No connection |
| 引脚 6 | NC — No connection |
| 引脚 7 | V- — Negative supply voltage |
| 引脚 8 | NC — No connection |
| 引脚 9 | NC — No connection |
| 引脚 10 | NC — No connection |
| 引脚 11 | NC — No connection |
| 引脚 12 | NC — No connection |
| 引脚 13 | NC — No connection |
| 引脚 14 | NC — No connection |
典型应用
AD650SD/883B 适用于 6 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： AD650SD/883B ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- Military-grade screening (MIL-STD-883B) （对比 AD650SD)
- Extended temperature range （对比 AD650AD)
- Same package and pinout （对比 AD650SD)
设计说明
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.
合规信息
Military-grade component, not RoHS compliant. No AEC-Q100 qualification as it is not an automotive part.
