器件名称: 5962-8962902LX
功能描述: LC2MOS Complete, 8-Bit Analog I/0 Systems
文件大小: 504.94KB 共20页
简 介:a
FEATURES 2 s ADC with Track/Hold 1 s DAC with Output Amplifier AD7569, Single DAC Output AD7669, Dual DAC Output On-Chip Bandgap Reference Fast Bus Interface Single or Dual 5 V Supplies
LC2MOS Complete, 8-Bit Analog I/0 Systems AD7569/AD7669
AD7569 FUNCTIONAL BLOCK DIAGRAM
GENERAL DESCRIPTION
The AD7569/AD7669 is a complete, 8-bit, analog I/O system on a single monolithic chip. The AD7569 contains a high speed successive approximation ADC with 2 s conversion time, a track/ hold with 200 kHz bandwidth, a DAC and an output buffer amplifier with 1 s settling time. A temperature-compensated 1.25 V bandgap reference provides a precision reference voltage for the ADC and the DAC. The AD7669 is similar, but contains two DACs with output buffer amplifiers. A choice of analog input/output ranges is available. Using a supply voltage of +5 V, input and output ranges of zero to 1.25 V and zero to 2.5 volts may be programmed using the RANGE input pin. Using a ± 5 V supply, bipolar ranges of ± 1.25 V or ± 2.5 V may be programmed. Digital interfacing is via an 8-bit I/O port and standard microprocessor control lines. Bus interface timing is extremely fast, allowing easy connection to all popular 8-bit microprocessors. A separate start convert line controls the track/hold and ADC to give precise control of the sampling period. The AD7569/AD7669 is fabricated in Linear-Compatible CMOS (LC2MOS), an advanced, mixed technology process combining precision bipolar circuits with low power CMOS……
