AD7866 双核1 MSPS、12位、双通道SAR型ADC,内置串行接口

AD7866: 双核1 MSPS、12位、双通道SAR型ADC,内置串行接口

AD7866是一款双核、12位、高速、低功耗、逐次逼近型ADC,采用单电源工作,电源电压为2.7 V至5.25 V,最高吞吐量可达1 MSPS。该器件内置两个ADC,两者之前均配有一个低噪声、宽带宽采样保持放大器,可处理10 MHz以上的输入频率。转换过程和数据采集过程均通过标准控制输入进行控制,可与微处理器或DSP轻松连接。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。AD7866采用先进的设计技术,可在高吞吐量的情况下实现极低的功耗。当电源电压为3 V、吞吐量为1 MSPS时,最大功耗为3.8 mA。当电源电压为5 V、吞吐量为1 MSPS时,最大功耗为4.8 mA。在休眠模式下工作时,还提供灵活的功耗/吞吐量管理功能

The AD7866 is a dual 12-bit high-speed, low power, successive-approximation ADC. The part operates from a single 2.7 V to 5.25 V power supply and features throughput rates up to 1 MSPS. The device contains two ADCs, each preceded by a low-noise, wide bandwidth track/hold amplifier, which can handle input frequencies in excess of 10 MHz.

The conversion process and data acquisition are controlled using standard control inputs allowing easy interfacing to microprocessors or DSPs. The input signal is sampled on the falling edge of CS and conversion is also initiated at this point. The conversion time is determined by the SCLK frequency. There are no pipelined delays with the part.

The AD7866 uses advanced design techniques to achieve very low power dissipation at high throughput rates. With 3 V supplies and 1 MSPS throughput rate, the part consumes a maximum of 3.8 mA. With 5 V supplies and 1 MSPS, the current consumption is a maximum of 4.8 mA. The part also offers flexible power/throughput rate management when operating in sleep mode.

AD7866 特点

双核12位、双通道ADC
高吞吐量：1 MSPS
额定电压（VDD）：2.7 V至5.25 V
低功耗：
- 最大11.4 mW（1 MSPS、3 V电源）
- 最大24 mW（1 MSPS、5 V电源）
宽输入带宽
- 信噪比：70 dB（300 kHz输入频率）
2.5 V片上基准电压源
灵活的功耗/吞吐量管理
同时转换/读取
无流水线延迟
高速串行接口：SPI(R)/QSPITM/MICROWIRETM/DSP兼容
关断模式：最大1uA
20引脚TSSOP封装
Dual 12-Bit, 2-Channel ADC
Fast Throughput Rate 1 MSPS
Specified for VDD of 2.7 V to 5.25 V
Low Power:
- 11.4 mW Max at 1 MSPS with 3 V Supplies
- 24 mW Max at 1 MSPS with 5 V Supplies
Wide Input Bandwidth
- 70 dB SNR at 300 kHz Input Frequency
Onboard Reference 2.5 V
Flexible Power/Throughput Rate Management
Simultaneous Conversion/Read
No Pipeline Delays
High-Speed Serial Interface SPI(R) /QSPITM / MICROWIRETM /DSP Compatible
Shut-Down Mode: uA Max
20-Lead TSSOP Package

AD7866 技术指标

Resolution (Bits): 12bit
# Chan: 4
Sample Rate: 1MSPS
Interface: Ser,SPI
Analog Input Type: SE-Uni
Ain Range: Uni (Vref),Uni (Vref) x 2,Uni 2.5V,Uni 5.0V
ADC Architecture: SAR
Pkg Type: SOP

AD7866 功能框图

AD7866 芯片订购指南

产品型号	产品状态	封装	引脚	温度范围
AD7866ARU	量产	20 ld TSSOP	20	工业
AD7866ARU-REEL7	量产	20 ld TSSOP	20	工业
AD7866ARUZ	量产	20 ld TSSOP	20	工业
AD7866ARUZ-REEL	量产	20 ld TSSOP	20	工业
AD7866ARUZ-REEL7	量产	20 ld TSSOP	20	工业
AD7866BRU	量产	20 ld TSSOP	20	工业
AD7866BRU-REEL7	量产	20 ld TSSOP	20	工业
AD7866BRUZ	量产	20 ld TSSOP	20	工业
AD7866BRUZ-REEL	量产	20 ld TSSOP	20	工业
AD7866BRUZ-REEL7	量产	20 ld TSSOP	20	工业
EVAL-AD7866CBZ	量产	EVALUATION BOARDS	-	TBD