AD652SQ: Monolithic Synchronous Voltage-to-Frequency Converter
The AD652 Synchronous Voltage-to-Frequency Converter (SVFC) is a powerful building block for precision analog-to-digital conversion, offering typical nonlinearity of 0.002% (0.005% maximum) at a 100 kHz output frequency. The inherent monotonicity of the transfer function and wide range of clock frequencies allows the conversion time and resolution to be optimized for specific applications.
The AD652 uses a variation of the popular charge-balancing technique to perform the conversion function. The AD652 uses an external clock to define the full-scale output frequency, rather than relying on the stability of an external capacitor. The result is a more stable, more linear transfer function, with significant application benefits in both single and multichannel systems.
Gain drift is minimized using a precision low drift reference and low TC on-chip thin-film scaling resistors. Furthermore, the initial gain error is reduced to less than 0.5% by the use of laser-wafer-trimming.
The analog and digital sections of the AD652 have been designed to allow operation from a single-ended power source, simplifying its use with isolated power supplies.
The AD652 is available in five performance grades. The 20-pin PLCC packaged JP and KP grades are specified for operation over the 0°C to +70°C commercial temperature range. The 16- pin cerdip-packaged AQ and BQ grades are specified for operation over the -40°C to +85°C industrial temperature range, and the AD652SQ is available for operation over the full -55°C to +125°C extended temperature range.
AD652SQ 特点
- Full-Scale Frequency (up to 2 MHz) set by external system clock
- Extremely low linearity error (0.005% max at 1 MHz FS, 0.02% max at 2 MHz FS)
- No critical external components required
- Accurate 5V reference voltage
- Low drift (25 ppm/°C max)
- Dual- or single-supply operation
- Voltage or current input
- MIL-STD-883 compliant versions available
AD652SQ 功能框图
| 产品型号 | 产品状态 | 封装 | 引脚 | 温度范围 |
|---|---|---|---|---|
| 5962-9322201MEA | 量产 | 16 ld CerDIP | 16 | 军用 |
| AD652AQ | 量产 | 16 ld CerDIP | 16 | 工业 |
| AD652AQ/+ | 量产 | 16 ld CerDIP | 16 | 工业 |
| AD652BQ | 量产 | 16 ld CerDIP | 16 | 工业 |
| AD652BQ/+ | 量产 | CERDIP GLASS SEAL | 16 | 工业 |
| AD652JP | 量产 | 20 ld PLCC | 20 | 商业 |
| AD652JP-REEL | 量产 | 20 ld PLCC | 20 | 商业 |
| AD652JP-REEL7 | 量产 | 20 ld PLCC | 20 | 商业 |
| AD652JPZ | 量产 | 20 ld PLCC | 20 | 商业 |
| AD652JPZ-REEL | 量产 | 20 ld PLCC | 20 | 商业 |
| AD652JPZ-REEL7 | 量产 | 20 ld PLCC | 20 | 商业 |
| AD652KP | 量产 | 20 ld PLCC | 20 | 商业 |
| AD652KPZ | 量产 | 20 ld PLCC | 20 | 商业 |
| AD652KPZ-REEL | 量产 | 20 ld PLCC | 20 | 商业 |
| AD652SE/883B | 量产 | 20 ld LCC | 20 | 军用 |
| AD652SQ | 量产 | 16 ld CerDIP | 16 | 军用 |
AD652SQ 应用技术支持与电子电路设计开发资源下载
- AD652 数据手册DataSheet下载 . pdf
- Analog Devices, Inc.ADI 美国模拟器件公司产品订购手册 .pdf
- ADC模数转换器选型指南 . pdf
