AD7705BRZ: 3V/5V、1 mW、双通道差分、16位Σ-Δ ADC
AD7705和AD7706均是完整的16位低成本Σ-Δ模数转换器（ADC）,用于直流测量和低频交流测量应用,其具有低功耗（3 V时最大1 mW）特性,因而能用在环路供电、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.
AD7705BRZ 特点
- 两个全差分输入通道ADC
- 可编程增益前端
增益范围从1至128 - 三线串行接口
SPI(R), QSPITM, MICROWIRETM, DSP 兼容
SCLK上可接受施密特触发器输入 - 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
- 3 V时最大功耗为1 mW
- 待机电流最大8 uA
- 16引脚DIP、16引脚SOIC和TSSOP封装
- Two Fully Differential Input Channel ADCs
- Programmable Gain Front End
Gains from 1 to 128 - Three-Wire Serial Interface
SPI(R), QSPITM, MICROWIRETM and DSP Compatible
Schmitt Trigger Input on SCLK - Ability to Buffer the Analog Input
- 2.7 V to 3.3 V or 4.75 V to 5.25 V Operation
- Power Dissipation 1 mW max @ 3 V
- Standby Current 8 uA max
- 16-Lead DIP, 16-Lead SOIC and TSSOP Packages
AD7705BRZ 功能框图
| 产品型号 | 产品状态 | 封装 | 引脚 | 温度范围 |
|---|---|---|---|---|
| AD7705BN | Prodn | 16 ld PDIP | 16 | 工业 |
| AD7705BNZ | Prodn | 16 ld PDIP | 16 | 工业 |
| AD7705BR | Prodn | 16 ld SOIC - Wide | 16 | 工业 |
| AD7705BR-REEL | Prodn | 16 ld SOIC - Wide | 16 | 工业 |
| AD7705BR-REEL7 | Prodn | 16 ld SOIC - Wide | 16 | 工业 |
| AD7705BRU | Prodn | 16 ld TSSOP | 16 | 工业 |
| AD7705BRU-REEL | Prodn | 16 ld TSSOP | 16 | 工业 |
| AD7705BRU-REEL7 | Prodn | 16 ld TSSOP | 16 | 工业 |
| AD7705BRUZ | Prodn | 16 ld TSSOP | 16 | 工业 |
| AD7705BRUZ-REEL | Prodn | 16 ld TSSOP | 16 | 工业 |
| AD7705BRUZ-REEL7 | Prodn | 16 ld TSSOP | 16 | 工业 |
| AD7705BRZ | Prodn | 16 ld SOIC - Wide | 16 | 工业 |
| AD7705BRZ-REEL | Prodn | 16 ld SOIC - Wide | 16 | 工业 |
| AD7705BRZ-REEL7 | Prodn | 16 ld SOIC - Wide | 16 | 工业 |
| EVAL-AD7705EBZ | Prodn | EVALUATION BOARDS | - | 工业 |
AD7705BRZ 应用技术支持与电子电路设计开发资源下载
- AD7705 数据手册DataSheet下载. pdf
- Analog Devices, Inc.ADI 美国模拟器件公司产品订购手册 .PDF
- ADC模数转换器选型指南 . PDF