ADC78H90 Datasheet | National Semiconductor

Description The ADC78H90 is a low-power, eight-channel CMOS 12-bit analog-to-digital converter with a conversion throughput of 500 k SPS. The converter is based on a successiveapproximation register architecture with an internal trackand-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 patible with several standards, such as SPI™, QSPI™, MICROWIRE™, and many mon DSP serial interfaces. The ADC78H90 may be operated with independent analog and digital supplies. The analog supply (AVDD) can range from +2.7V to +5.25V, and the digital supply (DVDD) can range from +2.7V to AVDD. Normal power consumption using a +3V or +5V supply is 1.5 m W and 8.3 m W, 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 n n n n Eight input channels Variable power management Independent analog and digital supplies SPI™/QSPI™/MICROWIRE™/DSP patible Packaged in 16-lead TSSOP Key Specifications n n n n Conversion Rate DNL INL Power Consumption - 3V Supply - 5V Supply 500 k SPS ± 1 LSB (max) ± 1 LSB (max) 1.5 m W (typ) 8.3 m W (typ) Applications n n n n n Automotive Navigation Portable Systems Medical Instruments Mobile munications Instrumentation and Control Systems Connection Diagram Ordering Information Order Code ADC78H90CIMT ADC78H90CIMTX ADC78H90EVAL Temperature Range - 40˚C to +85˚C - 40˚C to +85˚C Description 16-Lead TSSOP Package 16-Lead TSSOP Package, Tape & Reel 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. © 2004 National Semiconductor Corporation DS200793 .national. Block...