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ADC78H90 Arkusz danych(PDF) 1 Page - National Semiconductor (TI) |
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ADC78H90 Arkusz danych(HTML) 1 Page - National Semiconductor (TI) |
1 / 16 page ADC78H90 8-Channel, 500 kSPS, 12-Bit A/D Converter General Description The ADC78H90 is a low-power, eight-channel CMOS 12-bit analog-to-digital converter with a conversion throughput of 500 kSPS. The converter is based on a successive- approximation register architecture with an internal track- and-hold circuit. It can be configured to accept up to eight input signals at inputs AIN1 through AIN8. The output serial data is straight binary, and is compatible with several standards, such as SPI™, QSPI™, MICROW- IRE™, and many common DSP serial interfaces. The ADC78H90 may be operated with independent analog and digital supplies. The analog supply (AV DD) can range from +2.7V to +5.25V, and the digital supply (DV DD) can range from +2.7V to AV DD. Normal power consumption using a +3V or +5V supply is 1.5 mW and 8.3 mW, respectively. The power-down feature reduces the power consumption to just 0.3 µW using a +3V supply, or 0.5 µW using a +5V supply. The ADC78H90 is packaged in a 16-lead TSSOP package. Operation over the industrial temperature range of −40˚C to +85˚C is guaranteed. Features n Eight input channels n Variable power management n Independent analog and digital supplies n SPI™/QSPI™/MICROWIRE™/DSP compatible n Packaged in 16-lead TSSOP Key Specifications n Conversion Rate 500 kSPS n DNL ± 1 LSB (max) n INL ± 1 LSB (max) n Power Consumption — 3V Supply 1.5 mW (typ) — 5V Supply 8.3 mW (typ) Applications n Automotive Navigation n Portable Systems n Medical Instruments n Mobile Communications n Instrumentation and Control Systems Connection Diagram 20079305 Ordering Information Order Code Temperature Range Description ADC78H90CIMT −40˚C to +85˚C 16-Lead TSSOP Package ADC78H90CIMTX −40˚C to +85˚C 16-Lead TSSOP Package, Tape & Reel ADC78H90EVAL Evaluation Board TRI-STATE® is a trademark of National Semiconductor Corporation. MICROWIRE™ is a trademark of National Semiconductor Corporation. QSPI™ and SPI™ are trademarks of Motorola, Inc. March 2005 © 2005 National Semiconductor Corporation DS200793 www.national.com |
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