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AD8401

Analog Devices
Part Number AD8401
Manufacturer Analog Devices
Description 8-Bit/ 4-Channel Data Acquisition System
Published Mar 23, 2005
Detailed Description a FEATURES 2 ␮s ADC with T/H 4-Channel MUX AD899 Compatible +5 Volt Operation On-Chip Reference 4 ␮s Voltage Output DAC ...
Datasheet PDF File AD8401 PDF File

AD8401
AD8401

Overview
a FEATURES 2 ␮s ADC with T/H 4-Channel MUX AD899 Compatible +5 Volt Operation On-Chip Reference 4 ␮s Voltage Output DAC Fast Bus Access Time—75 ns APPLICATIONS Servo Controls Digitally Controlled Calibration Process Control Equipment A0 A1 VI N A VIN B VI N C VI N D RS INT BUSY ST DGND M U X T/H 8-Bit, 4-Channel Data Acquisition System AD8401 FUNCTIONAL BLOCK DIAGRAM VDD (+5.
0V) 8-BIT ADC 1.
25 REF 8-BIT DAC VOUT DAC REG CONTROL LOGIC ADC REG AD8401 RD CLK CS WR DATA I/O (8 BITS) AG DAC AG ADC GENERAL DESCRIPTION The AD8401 is a complete data acquisition and control system containing ADC, DAC, 4-channel MUX, and internal voltage reference.
Built using CBCMOS, this monolithic circuit offers the user a complete system with very high package density and reliability.
The converter is a successive approximation ADC with T/H, and is capable of operating with conversion times as short as 2 µs.
Analog input bandwidth is 200 kHz, and DAC output voltage settling time is less than 4 µs, making the AD8401 capable of controlling servo loops with speed and precision.
The 8-bit data interface provides both read and write operation for parallel bus interfaces to microcontrollers and DSP processors.
An external 5 MHz clock sets the 2 µs conversion rate.
Slower clocks reduce the conversion time and the internal power dissipation.
The standard control lines: Reset, Busy, Interrupt, Read and Write complete the handshaking signals for microprocessor communication.
A start trigger ST input allows precise sampling intervals in synchronous sampling applications.
The input multiplexer addressing is designed for direct interface to the AD899 hard-disk drive, read-channel device with no extra hardware or special software.
Analog input range levels are likewise compatible with the AD899.
The AD8401 is designed to operate from a single +5 volt supply, which will give an ADC input range of 0 V to 3.
0 V, and DAC output range of 0 V to 2.
5 V.
The AD8401 is offered in the SOIC-28 sur...


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