The AD7859/AD7859L are high speed, low power, 8-channel, 12-bit ADCs which operate from a single 3 V or 5 V power supply, the AD7859 being optimized for speed and the AD7859L for low power. The ADC contains self-calibration and system calibration options to ensure accurate operation over time and temperature and have a number of power-down options for low power applications.
The AD7859 is capable of 200 kHz throughput rate while the AD7859L 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 AD7859 and AD7859L input voltage range is 0 to VREF (unipolar) and -VREF/2 to +VREF/2 about VREF/2 (bipolar) with both straight binary and 2s complement output coding respectively. 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 44-pin, plastic quad flatpack package (PQFP) and plastic lead chip carrier (PLCC).
AD7859/AD7859L均为高速、低功耗、8通道、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。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。
AD7859的吞吐量可达200 kHz,而AD7859L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。AD7859和AD7859L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）；单极性方式下采用标准二进制编码,双极性方式下采用二进制补码输出编码。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44引脚、塑料四方扁平（PQFP）和塑料引脚片式载体（PLCC）两种封装。
低功耗：
| Resolution (Bits) | 12bit | Interface | Ser,SPI |
| 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 | LCC,QFP |
| Pwr Diss (max) | 33mW | -- | -- |
| 产品型号 | 产品状态 | 封装 | 引脚 | 温度范围 |
|---|---|---|---|---|
| AD7859APZ-REEL | 量产 | 44 ld PLCC | 44 | 工业 |
| AD7859ASZ | 量产 | 44 ld MQFP (13.90mm wide) | 44 | 工业 |
| AD7859ASZ-REEL | 量产 | 44 ld MQFP (13.90mm wide) | 44 | 工业 |
| AD7859BSZ | 量产 | 44 ld MQFP (13.90mm wide) | 44 | 工业 |
| AD7859LASZ | 量产 | 44 ld MQFP (13.90mm wide) | 44 | 工业 |
| AD7859LASZ-REEL | 量产 | 44 ld MQFP (13.90mm wide) | 44 | 商业 |
