AD7441BRT-R2 pseudo-differential input, 1 MSPS, 10-bit ADC in an 8-pin SOT-23 package
The AD7441/AD7451 are 10- and 12-bit, high-speed, low-power, single-supply, successive approximation (SAR) analog-to-digital converters (ADCs) that use pseudo-differential analog inputs and operate from a single 2.7 V to 5.25 V supply with a maximum throughput of 1 MSPS and very low power consumption.
The AD7441/AD7451 have a built-in low-noise, wide-bandwidth, differential sample-and-hold (T/H) amplifier that can handle input frequencies up to 3.5 MHz. The external reference is input via the VREF pin and can vary from 100 mV to VDD, depending on the power supply and application.
The conversion process and data acquisition are controlled by /CS and serial clocks, creating the conditions for the device to interface with the microprocessor or DSP. The input signal is sampled at the falling edge of /CS, while the conversion is initiated here at the same time. The devices feature a SAR architecture that ensures no pipeline delays.
Product Focus
- 采用2.7 V至5.25 V电源供电。
- 高吞吐量、低功耗。采用3 V电源时，AD7441/AD7451在1 MSPS吞吐量时的最大功耗为4 mW。
- 伪差分模拟输入。
- 灵活的功耗/串行时钟速度管理。转换速率由串行时钟确定，因此当串行时钟速度提高导致转换时间缩短时，功耗可降低。这些器件还提供关断模式，可在较低吞吐量下实现最高功效。
- 可变基准电压源输入。
- 无流水线延迟。
- 通过/CS输入与一次性转换控制，可实现对采样时间的精确控制。
- 采用500 mV基准电压时，ENOB典型值大于10位。
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sensor接口
- 电池供电系统
- 数据采集系统
- 便携式仪器仪表