ADS803E屬于集成電路（IC）的模數(shù)轉(zhuǎn)換器（ADC）。由美國(guó)德州儀器公司制造生產(chǎn)的ADS803E模數(shù)轉(zhuǎn)換器（ADC）模數(shù)轉(zhuǎn)換器（ADC、A/D 或 A 轉(zhuǎn) D）對(duì)模擬信號(hào)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(hào)。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。

FEATURES

HIGH SFDR: 82dB at NYQUIST

HIGH SNR: 69dB

LOW POWER: 115mW

LOW DLE: 0.25LSB

FLEXIBLE INPUT RANGE

OVER-RANGE INDICATOR

APPLICATIONS

IF AND BASEBAND DIGITIZATION

CCD IMAGING SCANNERS

TEST INSTRUMENTATION

DESCRIPTION

The ADS803 is a high-speed, high dynamic range, 12-bit

pipelined Analog-to-Digital (A/D) converter. This converter

includes a high-bandwidth track-and-hold that gives excellent

spurious performance up to and beyond the Nyquist rate.

This high-bandwidth, linear track-and-hold minimizes harmonics

and has low jitter, leading to excellent SNR performance.

The ADS803 is also pin-compatible with the 10MHz

ADS804 and the 20MHz ADS805.

The ADS803 provides an internal reference and can be

programmed for a 2Vp-p input range for the best spurious

performance and ease of driving. Alternatively, the 5Vp-p input

range can be used for the lowest input referred noise of

0.09LSBs rms giving superior imaging performance. There is

also a capability to set the input range in between the 2Vp-p

and 5Vp-p input ranges or to use an external reference. The

ADS803 also provides an over-range indicator flag to indicate

an input range that exceeds the full-scale input range of the

converter. This flag can be used to reduce the gain of the frontend

gain-ranging circuitry.

The ADS803 employs digital error-correction techniques to

provide excellent differential linearity for demanding imaging

applications. Its low distortion and high SNR give the extra

margin needed for communications, medical imaging, video,

and test instrumentation applications. The ADS803 is available

in an SSOP-28 package.