The AD7685 is a 16-bit, charge redistribution successive approximation, analog-to-digital converter (ADC) that operates from a single power supply, VDD, between 2.3 V to 5.5 V. It contains a low power, high speed, 16-bit sampling ADC with no missing codes, an internal conversion clock, and a versatile serial interface port. The part also contains a low noise, wide bandwidth, short aperture delay, track-and-hold circuit. On the CNV rising edge, it samples an analog input IN+ between 0 V to REF with respect to a ground sense IN?. The reference voltage, REF, is applied externally and can be set up to the supply voltage.

Power dissipation 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 or provides an optional BUSY indicator. It is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic using the separate supply VIO.

The AD7685 is housed in a 10-lead MSOP or a 10-lead QFN (LFCSP) with operation specified from ?40°C to +85°C.

Applications

Data Sheet, Rev. B, 3/07

EVAL-AD7685CBZ是针对AD7685的全功能评估套件。此评估板可单独使用，也可与评估控制器板配合使用。配合评估控制器板使用时，用户可利用提供的软件对ADC进行详尽的性能分析。此软件还包括技术笔记，说明评估板在单独使用以及配合评估控制器板使用时的操作与设置。

无

• AD5338 - 2.5 V至5.5 V、250 μA、双线式接口、双通道电压输出、10位DAC
• AD421 - 环路供电4-20 mA DAC
• AD8426 - 宽电源电压范围、轨到轨输出仪表放大器
• ADG3243 - 2.5 V/3.3 V、2位、独立控制电平转换器总线开关
• AD5290 - 紧凑型、+30 V / ±15 V、256位数字电位计
• ADP5030 - 双通道、200 mA、高性能RF LDO，内置负载开关
• AD8324 - 3.3 V DOCSIS 2.0上行电缆线路驱动器
• AD7792 - 3通道、低噪声、低功耗、16位Σ-Δ型ADC，内置片内仪表放大器和基准电压源
• ADUM1310 - 三通道数字隔离器
• ADM1812 - 具有高电平和低电平有效推挽输出、正复位输出的微处理器监控电路，采用SOT-23封装