AD7854AQ:  3 V to 5 V Single Supply, 200 kSPS, 12-Bit, Parallel Sampling ADC

The AD7854/AD7854L is a high speed, low power, 12-bit ADC that operates from a single 3 V or 5 V power supply, the AD7854 being optimized for speed and the AD7854L for low power. The ADC powers up with a set of default conditions at which time it can be operated as a read-only ADC. The ADC contains self-calibration and system calibration options to ensure accurate operation over time and temperature and has a number of power-down options for low power applications.

The AD7854 is capable of 200 kHz throughput rate while the AD7854L is capable of 100 kHz throughput rate. The input track-and-hold acquires a signal in 500 ns and features a pseudo-differential sampling scheme. The AD7854 and AD7854L input voltage range is 0 to VREF (unipolar) and -VREF/2 to +VREF/2, centered at VREF/2 (bipolar). The coding is straight binary in unipolar mode and twos complement in bipolar mode. Input signal range is to the supply and the part is capable of converting full-power signals to 100 kHz.

CMOS construction ensures low power dissipation of typically 5.4 mW for normal operation and 3.6 µW in power-down mode. The part is available in 28-pin, 0.6 inch wide dual-in-line package (DIP), 28-lead small outline (SOIC) and 28-lead small shrink outline (SSOP) packages.

AD7854/AD7854L均为高速、低功耗、12位ADC,采用3 V或5 V单电源供电,二者分别针对速度和低功耗进行了优化。当满足一组默认条件时,ADC上电,此时可作为只读ADC使用。两款ADC都含有自校准和系统校准选项,可确保操作精度不受时间和温度影响,还具有适合低功耗应用的多个省电选项。

AD7854的吞吐量可达200 kHz,而AD7854L的吞吐量可达100 kHz。通过输入采样保持功能可在500 ns内采集一个信号,并采用伪差分采样方案。AD7854和AD7854L的输入电压范围为0至VREF(单极性)和以VREF/2为中心的-VREF/2至+VREF/2(双极性)。在单极性方式下,采用标准二进制编码;在双极性方式下,采用二进制补码编码。输入信号范围可至电源电压,而且两款器件能够转换100 kHz的全功率信号。

CMOS结构可确保获得低功耗,正常工作模式下的典型功耗为5.4 mW,省电模式下为3.6 µW。两款器件提供三种封装:28引脚、0.6英寸宽、双列直插式封装(DIP);28引脚小形集成封装(SOIC);以及28引脚紧缩小型封装(SSOP)。

AD7854AQ 特性
AD7854AQ 技术指标
Resolution (Bits) 12bit Interface Byte,Par
T-Put Rate n/a Ain Range (Vref) p-p,Uni (Vref)
# Chan 1 SNR (dB) 71dB
Supply V Single(+3.3),Single(+5) Pkg Type SOIC,SOP
Pwr Diss (max) 30mW -- --
AD7854 芯片订购指南
产品型号 产品状态 封装 引脚 温度范围
AD7854AQ 量产 CERDIP GLASS SEAL 28 工业
AD7854AR 量产 28 ld SOIC - Wide 28 工业
AD7854ARS 量产 28 ld SSOP 28 工业
AD7854ARS-REEL 量产 28 ld SSOP 28 工业
AD7854ARSZ 量产 28 ld SSOP 28 工业
AD7854ARZ 量产 28 ld SOIC - Wide 28 工业
AD7854ARZ-REEL 量产 28 ld SOIC - Wide 28 工业
AD7854BRZ 量产 28 ld SOIC - Wide 28 工业
AD7854LAQ 量产 CERDIP GLASS SEAL 28 工业
AD7854LARS 量产 28 ld SSOP 28 工业
AD7854LARSZ 量产 28 ld SSOP 28 工业
AD7854LARSZ-REEL 量产 28 ld SSOP 28 工业
AD7854LARZ 量产 28 ld SOIC - Wide 28 工业
AD7854LARZ-REEL 量产 28 ld SOIC - Wide 28 工业
AD7854SQ 量产 CERDIP GLASS SEAL 28 军用
AD7854AQ 应用技术支持与电子电路设计开发资源下载
  1. AD7854 数据手册DataSheet下载 . pdf
  2. Analog Devices, Inc.ADI 美国模拟器件公司产品订购手册 .pdf
  3. ADC模数转换器选型指南 . pdf