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ML2259BCQ Folha de dados(PDF) 1 Page - Micro Linear Corporation |
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ML2259BCQ Folha de dados(HTML) 1 Page - Micro Linear Corporation |
1 / 13 page May 1997 ML2252*, ML2259** µP Compatible 8-Bit A/D Converters with 2- or 8-Channel Multiplexer GENERAL DESCRIPTION The ML2252 and ML2259 combine an 8-bit A/D converter, 2- or 8-channel analog multiplexer, and a microprocessor compatible 8-bit parallel interface and control logic in a single monolithic CMOS device. Easy interface to microprocessors is provided by the latched and decoded multiplexer address inputs and a double buffered three-state data bus. These analog-to- digital converters allow the microprocessor to operate completely asynchronous to the converter clock. The built in sample and hold function provides the ability to digitize a 5V, 50kHz sinewave to 8-bit accuracy. The differential comparator design provides low power supply sensitivity to DC and AC variations. The voltage reference can be externally set to any value between ground and VCC, thus allowing a full conversion over a relatively small span. All parameters are guaranteed over temperature with a power supply voltage of 5V ±10%. The device is suitable for a wide range of applications from process and machine control to consumer, automotive, and telecommunication applications. FEATURES s Conversion time (fCLK = 1.46MHz); 6.6µs s Total unadjusted error; ±1/2LSB or ±1LSB s No missing codes s Sample and hold; 390ns acquisition s Capable of digitizing a 5V, 50kHz sinewave s 2- or 8-channel input multiplexer s 0V to 5V analog input range with single 5V power supply s Operates ratiometrically or with up to 5V voltage reference s No zero or full scale adjust required s Analog input protection; 25mA per input min s Continuous conversion mode s Low power dissipation; 15mW max s TTL and CMOS compatible digital inputs and outputs ML2252 BLOCK DIAGRAM CONTROL & TIMING 2-CHANNEL MULTIPLEXER ADDRESS LATCH AND DECODER THREE STATE OUTPUT BUFFER SUCCESSIVE APPROXIMATION REGISTER D/A CONVERTER VCC A/D WITH SAMPLE-AND-HOLD FUNCTION 8pF 8pF Σ CLOCK + + – – DB7 COMP CH0 CH1 ALE A0 GND +VREF –VREF DB6 DB5 DB4 DB3 DB2 DB1 DB0 EOC START OE 1 * This Part Is Obsolete ** This Part Is End of Life As Of August 1, 2000 |
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Descrição semelhante - ML2259BCQ |
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