AD7894ARZ-10REEL7

模数转换器 - ADC Bipolar Input 5V 14B Serial 4.5uS

Product Details

The AD7894 is a fast, 14-Bit Analog-to-Digital Converter that operates from a single +5 V supply and is housed in a small 8-pin SOIC. The part contains a 5 µs successive approximation A/D converter, an on-chip track/hold amplifier, an on-chip clock and a high speed serial interface. Output data from the AD7894 is provided via a high speed, serial interface port. This two-wire serial interface has a serial clock input and a serial data output with the external serial clock accessing the serial data from the part.

In addition to the traditional dc accuracy specifications such as linearity, full-scale and offset errors, the AD7894 is also specified for dynamic performance parameters including harmonic distortion and signal-to-noise ratio. The part accepts an analog input range of ±10 V AD7894-10, ±2.5V AD7894-3, 0 V to 2.5 V AD7894-2, and operates from a single +5 V supply consuming only 20 mW typical.

The AD7894 features a high sampling rate mode and, for low power applications, a proprietary automatic power down mode where the part automatically goes into power down once conversion is complete and "wakes up" before the next conversion cycle. The part is available in a small outline IC SOIC.

### Features and Benefits

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Fast 14-Bit ADC with 5 µs Conversion Time

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8-Lead SOIC Package

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Single 5 V Supply Operation

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High Speed, Easy-to-Use, Serial Interface

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On-Chip Track/Hold Amplifier

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High Input Impedance

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Selection of Input Ranges:

±10 V for AD7894-10

±2.5 V for AD7894-3

0 V to +2.5 V for AD7894-2

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Low Power: 20 mW Typ

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Pin Compatible Upgrade of 12-Bit AD7895