AD7485: 14位1 MSPS SAR ADC
AD7485是一款14位高速、低功耗逐次逼近型ADC,配有一个串行接口,最高呑吐量可达1 MSPS。该器件内置一个低噪声、宽带宽采样/保持放大器,可处理10 MHz以上的输入频率。转换过程采用一种专有的逐次逼近算法技术。输入信号采样以及转换启动均在CONVST信号的下降沿进行。转换过程通过外部主时钟进行控制。接口则通过标准串行信号线实现,使该器件可与微控制器和DSP直接兼容。AD7485具有出色的交流和直流性能规格。工厂调整技术为高直流精度提供了保障,成就了极低的INL、偏移量和增益误差。该器件采用先进的设计技术,可在高呑吐量的情况下实现极低的功耗,正常工作模式下的功耗为70 mW。提供两种省电模式：一种是睡眠模式,使基准电路保持激活状态,以便快速上电启动,这种模式下的功耗为5 mW；另一种是待机模式,功耗仅为5 µW。
The AD7485 is a 14-bit, high speed, low power, successive-approximation ADC. The part features a serial interface with throughput rates up to 1 MSPS. The part contains a low-noise, wide bandwidth track/hold amplifier, which can handle input frequencies in excess of 10MHz.The conversion process is a proprietary algorithmic successive-approximation technique. The input signal is sampled and conversion is initiated on the falling edge of a CONVST signal. The conversion process is controlled by an external master clock. Interfacing is via standard serial signal lines making the part directly compatible with microcontrollers and DSPs.The AD7485 provides excellent ac and dc performance specifications. Factory trimming ensures high dc accuracy resulting in very low INL, offset and gain errors.
The part uses advanced design techniques to achieve very low power dissipation at high throughput rates. Power consumption in normal mode of operation is 70 mW. There are two power-saving modes: a NAP mode, which keeps reference circuitry alive for quick power up, consumes 5 mW while a STANDBY mode reduces power consumption to a mere 5 µW.
AD7485 特点
- 高呑吐量：1 MSPS
- 宽输入带宽：40 MHz
- 出色的直流精度性能
- 灵活的串行接口
- 待机模式：最大2 µA
- 低功耗：80 mW（全功率）和3 mW（睡眠模式）
- 采用5 V单电源供电
- 2.5 V内部基准电压
- 满度超量程指示
- Fast Throughput Rate: 1 MSPS
- Wide Input Bandwidth: 40 MHz
- Excellent DC Accuracy Performance
- Flexible Serial Interface
- STANDBY Mode: 2 µA Max
- Low Power:80 mW (Full Power) and 3 mW (NAP Mode)
- Single 5 V Supply Operation
- Internal 2.5 V Reference
- Full-Scale Overrange Indication
AD7485 技术指标
- Resolution (Bits): 14bit
- # Chan: 1
- Sample Rate: 1MSPS
- Interface: Ser
- Analog Input Type: SE-Uni
- Ain Range: Uni 2.5V
- ADC Architecture: SAR
- Pkg Type: QFP
AD7485 功能框图
AD7485 芯片订购指南
| 产品型号 | 封装 | 引脚 | 温度范围 | 包装和数量 | 报价*(100-499) | 报价*1000 pcs | RoHS |
|---|---|---|---|---|---|---|---|
| AD7485BSTZ 产品状态: 量产 | 48 ld LQFP | 48 | 工业 | Tray, 250 | $ 10.72 | $ 9.11 | 是 |
AD7485 应用技术支持与电子电路设计开发资源下载
- AD7485 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
