AD7720:动态范围为90 dB的CMOS Σ-Δ调制器

AD7720: 动态范围为90 dB的CMOS Σ-Δ调制器

AD7720是一款七阶Σ-Δ调制器,可将模拟输入信号转换为一个高速1比特数据流。该器件采用+5 V电源供电,接受以共模偏置电压为中心的0 V至+2.5 V或±1.25 V的差分输入电压。模拟输入由模拟调制器连续采样,因而无需外部采样保持电路。输入信息作为Ones密度包含在输出流中,通过适当的数字滤波器可重构原始信息。

This device is a 7th order sigma-delta modulator that converts the analog input signal into a high speed 1-bit data stream. The part operates from a +5 V supply and accepts a differential input range of 0 V to +2.5 V or ±1.25 V centered about a common-mode bias. The analog input is continuously sampled by the analog modulator, eliminating the need for external sample and hold circuitry. The input information is contained in the output stream as a density of ones. The original information can be reconstructed with an appropriate digital filter.

AD7720 特点

主时钟频率：12.5 MHz
输入范围：0 V至+2.5 V或±1.25 V
单比特输出流
动态范围：90 dB
AVDD,DVDD电源：+5 V ± 5%
2.5 V片内基准电压
28引脚TSSOP封装
12.5 MHz Master Clock Frequency
0 V to +2.5 V or ±1.25 V Input Range
Single Bit Output Stream
90 dB Dynamic Range
Power Supplies: AVDD, DVDD: +5 V ± 5%
On-Chip 2.5 V Voltage Reference
28-Lead TSSOP

AD7720 技术指标

Resolution (Bits): 16bit
# Chan: 1
Sample Rate: 25MSPS
Interface: Ser
Analog Input Type: Diff-Bip,Diff-Uni
Ain Range: Uni (Vref),Uni 2.5V,(Vref) p-p,2.5V p-p
ADC Architecture: Sigma-Delta Modulator
Pkg Type: SOP

AD7720 功能框图

AD7720 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
AD7720BRU 产品状态: 量产	28 ld TSSOP	28	工业	Tube, 50	$ 11.54	$ 9.83	否
AD7720BRUZ 产品状态: 量产	28 ld TSSOP	28	工业	Tube, 50	$ 10.00	$ 8.51	是
AD7720BRUZ-REEL 产品状态: 量产	28 ld TSSOP	28	工业	Reel, 2500	-	$ 8.51	是
AD7720BRUZ-REEL7 产品状态: 量产	28 ld TSSOP	28	工业	Reel, 1000	-	$ 8.51	是