ADC122S021屬于集成電路（IC）的模數(shù)轉(zhuǎn)換器（ADC）。由美國德州儀器公司制造生產(chǎn)的ADC122S021模數(shù)轉(zhuǎn)換器（ADC）模數(shù)轉(zhuǎn)換器（ADC、A/D 或 A 轉(zhuǎn) D）對模擬信號進(jìn)行采樣，例如由麥克風(fēng)采集的聲音或傳感器的輸出，然后將其轉(zhuǎn)換為數(shù)字信號。一般來說，數(shù)字輸出是二進(jìn)制補(bǔ)碼二進(jìn)制數(shù)，與輸入成比例。輸入類型可能是差分、偽差分或單端輸入。模數(shù)轉(zhuǎn)換器可按照位數(shù)、采樣率、輸入數(shù)、接口、轉(zhuǎn)換器數(shù)和架構(gòu)（例如自適應(yīng)增量、雙斜率、折疊、流水線、SAR、三角積分、兩步式）進(jìn)行選擇。

1FEATURES

2? Specified Over a Range of Sample Rates

? Two Input Channels

? Variable Power Management

? Single Power Supply with 2.7V - 5.25V Range

KEY SPECIFICATIONS

? DNL: ±0.09 LSB (Typ)

? INL: + 0.12/?0.062 LSB (Typ)

? SNR: 49.5 dB (Typ)

? Power Consumption:

– 3V Supply: 2.2 mW (Typ)

– 5V Supply 7.1 mW (Typ)

APPLICATIONS

? Portable Systems

? Remote Data Acquisition

? Instrumentation and Control Systems

DESCRIPTION

The ADC082S051 is a low-power, two-channel

CMOS 8-bit analog-to-digital converter with a high-

speed serial interface. Unlike the conventional

practice of specifying performance at a single sample

rate only, the ADC082S051 is fully specified over a

sample rate range of 200 ksps to 500 ksps. The

converter is based on a successive-approximation

register architecture with an internal track-and-hold

circuit. It can be configured to accept one or two input

signals at inputs IN1 and IN2.

The output serial data is straight binary, and is

compatible with several standards, such as SPI?,

QSPI?, MICROWIRE, and many common DSP serial interfaces.

The ADC082S051 operates with a single supply that

can range from +2.7V to +5.25V. Normal power consumption using a +3V or +5V supply is 2.2 mW

and 7.1 mW, respectively. The power-down feature

reduces the power consumption to just 0.12 μW using

a +3V supply, or 0.35 μW using a +5V supply.

The ADC082S051 is packaged in an 8-lead VSSOP

package. Operation over the industrial temperature

range of ?40°C to +85°C is ensured.