AD7691:  18位、1.5 LSB INL、250 kSPS PulSAR®差分ADC,采用MSOP或QFN封装

AD7691是一款18位、电荷再分配、逐次逼近型模数转换器(ADC),采用2.3 V至5 V单电源(VDD)供电。该器件内置一个低功耗、高速、18位无失码采样ADC、一个内部转换时钟和一个多功能串行接口端口。在CNV上升沿,该器件对IN+与IN-引脚之间的电压差进行采样。这两个引脚上的电压摆幅通常在0 V至REF之间、相位相反。基准电压(REF)由外部提供。最高可设置为电源电压,其功耗和吞吐量呈线性变化关系。

SPI兼容串行接口还能够利用SDI输入,将几个ADC以菊花链形式连结到单三线式总线上,并提供一个可选的忙闲指示。采用独立电源VIO时,该器件与1.8V、2.5V、3V或5V逻辑兼容。AD7691采用10引脚MSOP封装或10引脚QFN(LFCSP)封装,工作温度范围为−40°C至+85°C。

The AD7691 is an 18-bit, charge redistribution, successive approximation, analog-to-digital converter (ADC) that operates from a single power supply, VDD, between 2.3 V and 5 V. It contains a low power, high speed, 18-bit sampling ADC with no missing codes, an internal conversion clock, and a versatile serial interface port. On the CNV rising edge, it samples the voltage difference between the IN+ and IN− pins. The voltages on these pins usually swing in opposite phase between 0 V and REF. The reference voltage, REF, is applied externally and can be set up to the supply voltage.Its power scales linearly with throughput.

The SPI-compatible serial interface also features the ability, using the SDI input, to daisy-chain several ADCs on a single 3-wire bus and provides an optional busy indicator. It is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic, using the separate VIO supply.The AD7691 is housed in a 10-lead MSOP or a 10-lead QFN (LFCSP) with operation specified from −40°C to +85°C.

AD7691 特点
AD7691 技术指标
AD7691 应用领域
AD7691 建议配套产品
低噪声、低功耗、单端转差分 ADA4941-1
低噪声、低功耗、小型封装 ADA4841-1
低噪声、5V单电源 AD8655
低噪声、高频 AD8021ADA4899-1AD8022
低功耗、5V单电源 AD8605AD8615
推荐AD7691使用的基准电压源
最佳性能 ADR435、ADR43x
基准电压缓冲 AD8031AD8605

推荐电源解决方案

选择电压调节器产品 ADIsimPower
选择电源监控器产品 电源监控器参数搜索
AD7691 功能框图

AD7691 产品选型
产品型号 产品状态 封装 引脚 温度范围
AD7691BCPZRL Prodn 10 ld LFCSP (3x3mm) 10 工业
AD7691BCPZRL7 Prodn 10 ld LFCSP (3x3mm) 10 工业
AD7691BRMZ Prodn 10 ld MSOP 10 工业
AD7691BRMZ-RL7 Prodn 10 ld MSOP 10 工业
EVAL-AD7691CBZ Prodn EVALUATION BOARDS 8 工业
AD7691 应用技术支持与电子电路设计开发资源下载
  1. AD7691 数据手册DataSheet下载 .pdf
  2. Analog Devices, Inc.ADI 美国模拟器件公司产品订购手册 .pdf
  3. ADC模数转换器选型指南 .pdf