AD7854ARS

3 V至5 V单电源， 200 kSPS的12位采样ADC 3 V to 5 V Single Supply, 200 kSPS 12-Bit Sampling ADCs

Product Details

The AD7854/AD7854L is a high speed, low power, 12-bit ADC that operates from a single 3 V or 5 V power supply, the AD7854 being optimized for speed and the AD7854L for low power. The ADC powers up with a set of default conditions at which time it can be operated as a read-only ADC. The ADC contains self-calibration and system calibration options to ensure accurate operation over time and temperature and has a number of power-down options for low power applications.

The AD7854 is capable of 200 kHz throughput rate while the AD7854L is capable of 100 kHz throughput rate. The input track-and-hold acquires a signal in 500 ns and features a pseudo-differential sampling scheme. The AD7854 and AD7854L input voltage range is 0 to VREF unipolar and -VREF/2 to +VREF/2, centered at VREF/2 bipolar. The coding is straight binary in unipolar mode and twos complement in bipolar mode. Input signal range is to the supply and the part is capable of converting full-power signals to 100 kHz.

CMOS construction ensures low power dissipation of typically 5.4 mW for normal operation and 3.6 µW in power-down mode. The part is available in 28-pin, 0.6 inch wide dual-in-line package DIP, 28-lead small outline SOIC and 28-lead small shrink outline SSOP packages.

### Features and Benefits

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Specified for VDD of 3 V to 5.5 V

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Read-Only Operation

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AD7854–200 kSPS; AD7854L–100 kSPS

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System and Self-Calibration

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Flexible Parallel Interface

12-Bit Parallel/8-Bit Parallel AD7854

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28-Lead DIP, SOIC and SSOP Packages AD7854

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Low Power:

\- Normal Operation

AD7854: 15 mW VDD = 3 V

AD7854L: 5.5 mW VDD = 3 V

\- Automatic Power-Down After

Conversion 25 µW

AD7854: 1.3 mW 10 kSPS

AD7854L: 650 µW 10 kSPS

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