AD7899BR-1屬于集成電路（IC）的模數(shù)轉(zhuǎn)換器（ADC）。由亞德諾半導(dǎo)體技術(shù)有限公司制造生產(chǎn)的AD7899BR-1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。

GENERAL DESCRIPTION

The AD7899 is a fast, low-power, 14-bit A/D converter that operates from a single 5 V supply. The part contains a 2.2 μs successive-approximation ADC, a track/hold amplifier, 2.5 V reference, on-chip clock oscillator, signal conditioning circuitry, and a high-speed parallel interface. The part accepts analog input ranges of ±10 V, ±5 V, ±2.5 V, 0 V to 2.5 V, and 0 V to 5 V. Overvoltage protection on the analog input for the part allows the input voltage to be exceeded without damaging the parts.

Speed of conversion can be controlled either by an internally trimmed clock oscillator or by an external clock.

PRODUCT HIGHLIGHTS

1. The AD7899 features a fast (2.2 μs) ADC allowing through put rates of up to 400 kSPS.

2. The AD7899 operates from a single 5 V supply and consumes only 80 mW typ making it ideal for low power and portable applications.

3. The part offers a high-speed parallel interface. The interface can operate in 3 V and 5 V mode allowing for easy connec tion to 3 V or 5 V microprocessors, microcontrollers, and digital signal processors.

4. The part is offered in three versions with different analog input ranges. The AD7899-1 offers the standard industrial ranges of ±10 V and ±5 V; the AD7899-2 offers a unipolar range of 0 V to 2.5 or 0 V to 5 V, and the AD7899-3 has an input range of ±2.5 V.

FEATURES

Fast (2.2 μs) 14-Bit ADC

400 kSPS Throughput Rate

0.3 μs Track/Hold Acquisition Time

Single Supply Operation

Selection of Input Ranges: ±10 V, ±5 V and ±2.5 V 0 V to 2.5 V and 0 V to 5 V

High-Speed Parallel Interface which Also Allows Interfacing to 3 V Processors

Low Power, 80 mW Typ

Power-Saving Mode, 20 μW Typ

Overvoltage Protection on Analog Inputs

Power-Down Mode via STBY Pin