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ADCS7476AIMF Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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ADCS7476AIMF Datasheet(HTML) 1 Page - National Semiconductor (TI) |
1 / 22 page ADCS7476/ADCS7477/ADCS7478 1MSPS, 12-/10-/8-Bit A/D Converters in 6-Lead SOT-23 General Description The ADCS7476, ADCS7477, and ADCS7478 are low power, monolithic CMOS 12-, 10- and 8-bit analog-to-digital con- verters that operate at 1 MSPS. The ADCS7476/77/78 are drop-in replacements for Analog Devices’ AD7476/77/78. Each device is based on a successive approximation regis- ter architecture with internal track-and-hold. The serial inter- face is compatible with several standards, such as SPI™, QSPI™, MICROWIRE™, and many common DSP serial in- terfaces. The ADCS7476/77/78 uses the supply voltage as a refer- ence. This enables the devices to operate with a full-scale input range of 0 to V DD. The conversion rate is determined from the serial clock (SCLK) speed. These converters offer a shutdown mode, which can be used to trade throughput for power consumption. The ADCS7476/77/78 is operated with a single supply that can range from +2.7V to +5.25V. Normal power consumption during continuous conversion, using a +3V or +5V supply, is 2 mW or 10 mW respectively. The power down feature, which is enabled by a chip select (CS) pin, reduces the power consumption to under 5 µW using a +5V supply. All three converters are packaged in a 6-lead, SOT-23 package that provides an extremely small footprint for applications where space is a critical consideration. These products are designed for operation over the automotive/extended industrial temperature range of −40˚C to +125˚C. Features n Variable power management n Packaged in 6-lead, SOT-23 n Power supply used as reference n Single +2.7V to +5.25V supply operation n SPI™/QSPI™/MICROWIRE™/DSP compatible Key Specifications n Resolution with no Missing Codes 12/10/8 bits n Conversion Rate 1 MSPS n DNL +0.5, -0.3 LSB (typ) n INL ± 0.4 LSB (typ) n Power Consumption 3V Supply 2 mW (typ) 5V Supply 10 mW (typ) Applications n Automotive Navigation n FA/ATM Equipment n Portable Systems n Medical Instruments n Mobile Communications n Instrumentation and Control Systems Connection Diagram 20057701 MICROWIRE™ is a trademark of National Semiconductor Corporation. TRI-STATE® is a trademark of National Semiconductor Corporation. QSPI™ and SPI™ are trademarks of Motorola, Inc. June 2003 © 2003 National Semiconductor Corporation DS200577 www.national.com |
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