AD7706:3V或5V、1mW、3通道伪差分、16位Σ-Δ ADC

AD7706: 3V或5V、1mW、3通道伪差分、16位Σ-Δ ADC

AD7705和AD7706均为完全16位、低成本Σ-Δ ADC,适合直流测量和低频交流测量应用,其具有低功耗（3 V时最大值为1 mW ）特性,因而可用于环路供电、电池供电或本地供电的应用中。片内可编程增益放大器提供从1至128的增益设置,无需使用外部信号调节硬件便可接受低电平和高电平模拟输入。

AD7705拥有两个差分通道,而AD7706则拥有一个差分通道和两个伪差分通道。在定制比率应用器件时,差分基准电压输入还能提供极大的灵活性。

The AD7705 and AD7706 are complete 16-bit, low-cost, Sigma Delta ADCs intended for dc and low-frequency ac measurement applications. Their low power (1 mW max @ 3 V) allows them to be used in loop-powered, battery-powered or locally-powered applications. The on-chip Programmable Gain Amplifier with gain settings from I through 128 can accommodate both low-level and high-level analog inputs with no external signal conditioning hardware.

The AD7705 has two differential channels while the AD7706 has one differential and two pseudo-differential channels. Differential reference inputs also allow maximum flexibility in tailoring the device for use in ratiometric applications.

AD7706 特点

3个伪差分输入通道ADC
- 16位无失码
- 0.003%非线性度
可编程增益前端- 增益范围：1至128
提供模拟输入缓冲
工作电压：2.7 V至3.3 V或4.75 V至5.25 V
三线式串行接口
- SPI(R), QSPITM, MICROWIRETM, DSP 兼容
- SCLK上可接受施密特触发器输入
功耗：1 mW（最大值、3 V）
待机电流：最大8 uA
16引脚DIP、16引脚SOIC和TSSOP封装
Three Pseudo Differential Input Channel ADCs
- 16 Bits No Missing Codes
- 0.003% Nonlinearity
Programmable Gain Front End
- Gains from 1 to 128
Ability to Buffer the Analog Input
2.7 V to 3.3 V or 4.75 V to 5.25 V Operation
Three-Wire Serial Interface
- SPI(R), QSPITM, MICROWIRETM and DSP Compatible
- Schmitt Trigger Input on SCLK
Power Dissipation 1 mW max @ 3 V
Standby Current 8 uA max
16-Lead DIP, 16-Lead SOIC and TSSOP Packages

AD7706 技术指标

Resolution (Bits): 16bit
# Chan: 3
Sample Rate: n/a
Interface: Ser,SPI
Analog Input Type: Diff-Uni,Diff-Bip
Ain Range: Bip (Vref)/(PGA Gain),Uni (Vref)/(PGA Gain)
ADC Architecture: Sigma-Delta
Pkg Type: SOP,SOIC,DIP

AD7706 功能框图

AD7706 芯片订购指南

产品型号	产品状态	封装	引脚	温度范围
AD7706BN	Prodn	16 ld PDIP	16	工业
AD7706BNZ	Prodn	16 ld PDIP	16	工业
AD7706BR	Prodn	16 ld SOIC - Wide	16	工业
AD7706BR-REEL	Prodn	16 ld SOIC - Wide	16	工业
AD7706BR-REEL7	Prodn	16 ld SOIC - Wide	16	工业
AD7706BRU	Prodn	16 ld TSSOP	16	工业
AD7706BRU-REEL	Prodn	16 ld TSSOP	16	工业
AD7706BRU-REEL7	Prodn	16 ld TSSOP	16	工业
AD7706BRUZ	Prodn	16 ld TSSOP	16	商业
AD7706BRUZ-REEL	Prodn	16 ld TSSOP	16	工业
AD7706BRUZ-REEL7	Prodn	16 ld TSSOP	16	工业
AD7706BRZ	Prodn	16 ld SOIC - Wide	16	工业
AD7706BRZ-REEL	Prodn	16 ld SOIC - Wide	16	工业
AD7706BRZ-REEL7	Prodn	16 ld SOIC - Wide	16	工业
EVAL-AD7706EBZ	Prodn	EVALUATION BOARDS	-	待定