AD7475:1 MSPS 12位A/D转换器,采用MSOP-8或SOIC-8封装

AD7475: 1 MSPS 12位A/D转换器,采用MSOP-8或SOIC-8封装

AD7475/AD7495*是12位高速、低功耗逐次逼近型ADC,工作电压为2.7 V至5.25 V单电源,最高呑吐量可达1 MSPS。这些器件内置一个低噪声、宽带宽采样-保持放大器,可处理1 MHz以上的输入频率。

转换过程和数据采集过程通过 CS和串行时钟进行控制,从而为器件与微处理器或DSP接口创造了条件。输入信号在CS的下降沿进行采样,而转换同时在此处启动。转换时间取决于SCLK频率。该器件无流水线延迟。AD7475/AD7495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。采用3 V电源,呑吐量为1 MSPS时,AD7475的功耗仅为1.5 mA,而AD7495也不过2 mA。采用5 V电源,呑吐量为1 MSPS时,AD7475和AD7495的功耗分别为2.1 mA和2.6 mA。这些器件的模拟输入范围为0 V至REF IN。AD7475采用2.5 V的外部基准电压,通过REF IN引脚输入,而AD7495则采用2.5 V的片内基准电压。

The AD7475/AD7495* are 12-bit, high speed, low power, successive-approximation ADCs that operate from a single 2.7 V to 5.25 V power supply with throughput rates up to 1 MSPS. They contain a low noise, wide bandwidth track-and-hold amplifier that can handle input frequencies above 1 MHz.

The conversion process and data acquisition are controlled using CS and the serial clock, allowing the devices to interface with microprocessors or DSPs. The input signal is sampled on the falling edge of CS and conversion is initiated at this point. The conversion time is determined by the SCLK frequency. There are no pipeline delays associated with the part.

The AD7475/AD7495 use advanced design techniques to achieve very low power dissipation at high throughput rates. With 3 V supplies and a 1 MSPS throughput rate, the AD7475 consumes just 1.5 mA, while the AD7495 consumes 2 mA. With 5 V supplies and 1 MSPS, the current consumption is 2.1 mA for the AD7475 and 2.6 mA for the AD7495.The analog input range for the parts is 0 V to REF IN. The 2.5 V reference for the AD7475 is applied externally to the REF IN pin, while the AD7495 has an on-board 2.5 V reference.

AD7475 特点

高呑吐量：1 MSPS
额定电压(VDD )：2.7 V至5.25 V
低功耗：
最大4.5 mW（1 MSPS,3 V电源）
最大10.5 mW（1 MSPS,5 V电源）
宽输入带宽：68 dB信噪比（300 kHz输入频率）
无流水线延迟
灵活的功耗/串行时钟速度管理
高速串行接口,SPI(R)/QSPITM/MICROWIRETM/DSP兼容
2.5 V的片内基准电压（仅AD7495）
待机模式：最大1 u A
8引脚MSOP和SOIC封装
Fast Throughput Rate: 1 MSPS
Specified for VDD of 2.7 V to 5.25 V
Low Power:
4.5 mW Max at 1 MSPS with 3 V Supplies
10.5 mW Max at 1 MSPS with 5 V Supplies
Wide Input Bandwidth: 68 dB SNR at 300 kHz Input Frequency
No Pipeline Delays
Flexible Power/Serial Clock Speed Management
High-Speed Serial Interface SPI(R)/QSPITM/MICROWIRETM/DSP-Compatible
On-Board Reference 2.5 V (AD7495 Only)
Standby Mode: 1 uA Max
8-lead MSOP and SOIC Packages

AD7475 技术指标

Resolution (Bits): 12bit
# Chan: 1
Sample Rate: 1MSPS
Interface: Ser
Analog Input Type: SE-Uni
Ain Range: Uni (Vref)
ADC Architecture: SAR
Pkg Type: SOIC,SOP

AD7475 功能框图

AD7475 芯片订购指南

产品型号	产品状态	封装	引脚	温度范围
AD7475ARM	量产	8 ld MSOP	8	工业
AD7475ARM-REEL7	量产	8 ld MSOP	8	工业
AD7475ARMZ	量产	8 ld MSOP	8	工业
AD7475ARMZ-REEL7	量产	8 ld MSOP	8	工业
AD7475ARZ	量产	8 ld SOIC	8	工业
AD7475BR	量产	8 ld SOIC	8	工业
AD7475BR-REEL7	量产	8 ld SOIC	8	商业
AD7475BRM	量产	8 ld MSOP	8	工业
AD7475BRM-REEL7	量产	8 ld MSOP	8	工业
AD7475BRMZ	量产	8 ld MSOP	8	工业
AD7475BRMZ-REEL	量产	8 ld MSOP	8	工业
AD7475BRMZ-REEL7	量产	8 ld MSOP	8	工业
AD7475BRZ	量产	8 ld SOIC	8	工业
AD7475BRZ-REEL	量产	8 ld SOIC	8	商业
AD7475BRZ-REEL7	量产	8 ld SOIC	8	商业
EVAL-AD7475CB	量产	评估板	-	待定