AD7801集成電路（IC）的數(shù)模轉換器（DAC）規(guī)格書PDF中文資料

AD7801屬于集成電路（IC）的數(shù)模轉換器（DAC）。由亞德諾半導體技術有限公司制造生產的AD7801數(shù)模轉換器（DAC）數(shù)模轉換器（DAC、D/A、D2A 或 D 轉 A）可將數(shù)字信號轉換為緩沖或無緩沖的模擬電壓或電流。DAC 架構是否適合特定應用，要取決于分辨率和采樣頻率。DAC 通常用于音樂播放器，將數(shù)字數(shù)據(jù)流轉換為模擬音頻流。它們還用于電視和手機，將數(shù)字視頻數(shù)據(jù)轉換為模擬視頻信號，再連接到屏幕驅動器，以顯示單色或彩色圖像。

GENERAL DESCRIPTION

The AD7801 is a single, 8-bit, voltage out DAC that operates from a single +2.7 V to +5.5 V supply. Its on-chip precision output buffer allows the DAC output to swing rail to rail. The AD7801 has a parallel microprocessor and DSP compatible interface with high speed registers and double buffered interface logic. Data is loaded to the input register on the rising edge of CS or WR. Reference selection for the AD7801 can be either an internal reference derived from the VDD or an external reference applied at the REFIN pin. The output of the DAC can be cleared by using the asynchronous CLR input. The low power consumption of this part makes it ideally suited to portable battery operated equipment. The power consumption is less than 5 mW at 3.3 V, reducing to less than 3 μW in power-down mode.

PRODUCT HIGHLIGHTS

1. Low Power, Single Supply operation. This part operates from a single +2.7 V to +5.5 V supply and consumes typically 5 mW at 3 V, making it ideal for battery powered applications.

2. The on-chip output buffer amplifier allows the output of the DAC to swing rail to rail with a settling time of typically 1.2 μs.

3. Internal or external reference capability.

4. High speed parallel interface.

5. Power-down capability. When powered down the DAC consumes less than 1 μA at 25°C.

6. Packaged in 20-lead SOIC and TSSOP packages.

FEATURES

Single 8-Bit DAC

20-Pin SOIC/TSSOP Package

+2.7 V to +5.5 V Operation

Internal and External Reference Capability

DAC Power-Down Function

Parallel Interface

On-Chip Output Buffer Rail-to-Rail Operation

Low Power Operation 1.75 mA max @ 3.3 V

Power-Down to 1 mA max @ 258C

APPLICATIONS

Portable Battery Powered Instruments

Digital Gain and Offset Adjustment

Programmable Voltage and Current Sources

Programmable Attenuators