GENERAL DESCRIPTION

The AD7693 is a 16-bit, successive approximation, analog-to digital converter (ADC) that operates from a single power supply, VDD. It contains a low power, high speed, 16-bit sampling ADC with no missing codes, an internal conversion clock, and a versatile serial interface port. On the CNV rising edge, it samples the voltage difference between the IN+ and IN? pins. The voltages on these pins swing in opposite phase between 0 V and REF. The reference voltage, REF, is applied externally and can be set up to the supply voltage, VDD.

FEATURES

16-bit resolution with no missing codes

Throughput: 500 kSPS

INL: +/-0.25 LSB typical, ±0.65 LSB max (±10 ppm of FSR)

Dynamic range: 96.5 dB typical @ 500 kSPS

SINAD: 96 dB typical @ 1 kHz, REF = 5V

THD: ?120 dB typical @ 1 kHz. REF = 5V

True differential analog input range: ±VREF

0 V to VREF with VREF up to VDDon both inputs

No pipeline delay

Single-supply 5 V operation with

1.8 V/2.5 V/3 V/5 V logic interface

Serial interface SPI?/QSPI?/MICROWIRE?/DSP-compatible

Daisy-chain multiple ADCs and busy indicator

Power dissipation

4 mW @ 5 V/100 kSPS

40 μW @ 5 V/1 kSPS

Standby current: 1 nA

10-lead package: MSOP (MSOP-8 size) and

3 mm × 3 mm QFN (LFCSP) (SOT-23 size)

Pin-for-pin compatible with the AD7687, AD7688 and18-bit AD7690 and AD7691

AD7690屬于集成電路（IC） > 模數(shù)轉(zhuǎn)換器（ADC）。亞德諾半導(dǎo)體技術(shù)有限公司制造生產(chǎn)的AD7690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(lái)說(shuō)，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。