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

• ADN2813 - 连续速率12.3 Mb/s至1.25 Gb/s时钟和数据恢复IC，集成限幅放大器
• AD7734 - 4通道、±10 V输入范围、高吞吐速率、24位Σ-Δ型ADC
• ADP2109 - 600 mA、3 MHz的小尺寸降压转换器
• HMC712 - 吸收式可变电压衰减器(VVA)
• AD8188 - 350 MHz、单电源（5 V）、三通道、2:1多路复用器
• AD7686 - 16位、500 kSPS PulSAR? ADC，采用MSOP或QFN封装
• ADA4700-1 - 100 V精密运算放大器
• ADXL337 - ADXL337：小尺寸、低功耗、三轴±3g加速度计
• AD800 - 45或52 Mbps时钟和数据恢复IC
• ADP196 - 5V、3A逻辑控制的高端电源开关