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AD7669

Analog Devices
Part Number AD7669
Manufacturer Analog Devices
Description LC2MOS Complete/ 8-Bit Analog I/0 Systems
Published Mar 23, 2005
Detailed Description a FEATURES 2 ␮s ADC with Track/Hold 1 ␮s DAC with Output Amplifier AD7569, Single DAC Output AD7669, Dual DAC Output On-...
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AD7669
AD7669

Overview
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 µs conversion time, a track/ hold with 200 kHz bandwidth, a DAC and an output buffer amplifier with 1 µs 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 logic.
The AD7569 is packaged in a 24-pin, 0.
3" wide “skinny” DIP, a 24-terminal SOIC and 28-terminal PLCC and LCCC packages.
The AD7669 is available in a 28-pin, 0.
6" plastic DIP, 28-terminal SOIC and 28-terminal PLCC package.
AD7669 FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS 1.
Complete Analog I/O on a Single Chip.
The AD7569/AD7669 provides everything necessary to interface a microprocessor to the analog world.
No external components or user trims are required and the overall accurac...


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