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AD7824KRZ データシート(PDF) 1 Page - Analog Devices |
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AD7824KRZ データシート(HTML) 1 Page - Analog Devices |
1 / 16 page REV. F Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective companies. a LC2MOS High Speed 4- and 8-Channel 8-Bit ADCs AD7824/AD7828 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 www.analog.com Fax: 781/326-8703 © 2003 Analog Devices, Inc. All rights reserved. FUNCTIONAL BLOCK DIAGRAM RDY CS RD INT DB3 DB2 DB1 DB0 DB7 DB6 DB5 DB4 THREE- STATE DRIVERS 4-BIT FLASH ADC (4LSB) VREF (+) 16 TIMING AND CONTROL CIRCUITRY ADDRESS LATCH DECODE AIN1 AIN4 AIN8 MUX* *AD7824 – 4-CHANNEL MUX **AD7828 – 8-CHANNEL MUX A2 – AD7828 ONLY A0 A1 A2** VREF (+) VREF (–) 4-BIT FLASH ADC (4MSB) 4-BIT DAC FEATURES 4 or 8 Analog Input Channels Built-In Track-and-Hold Function 10 kHz Signal Handling on Each Channel Fast Microprocessor Interface Single 5 V Supply Low Power: 50 mW Fast Conversion Rate: 2.5 s/Channel Tight Error Specification: 1/2 LSB GENERAL DESCRIPTION The AD7824 and AD7828 are high speed, multichannel, 8-bit ADCs with a choice of four (AD7824) or eight (AD7828) multi- plexed analog inputs. A half-flash conversion technique gives a fast conversion rate of 2.5 µs per channel, and the parts have a built-in track-and-hold function capable of digitizing full-scale signals of 10 kHz (157 mV/ µs slew rate) on all channels. The AD7824 and AD7828 operate from a single 5 V supply and have an analog input range of 0 V to 5 V, using an external 5 V reference. Microprocessor interfacing of the parts is simple, using standard Chip Select ( CS) and Read (RD) signals to initiate the conversion and read the data from the three-state data outputs. The half-flash conversion technique means that there is no need to generate a clock signal for the ADC. The AD7824 and AD7828 can be interfaced easily to most popular microprocessors. The AD7824 and AD7828 are fabricated in an advanced, all ion-implanted, linear compatible CMOS process (LC 2MOS) and have low power dissipation of 40 mW (typ). The AD7824 is available in a 0.3" wide, 24-lead “skinny” DIP, while the AD7828 is available in a 0.6" wide, 28-lead DIP and in 28-terminal surface- mount packages. PRODUCT HIGHLIGHTS 1. 4- or 8-channel input multiplexer gives cost effective, space-saving multichannel ADC system. 2. Fast conversion rate of 2.5 µs/channel features a per-channel sampling frequency of 100 kHz for the AD7824 or 50 kHz for the AD7828. 3. Built-in track-and-hold function allows handling of four or eight channels up to 10 kHz bandwidth (157 mV/ µs slew rate). 4. Tight total unadjusted error spec and channel-to-channel matching eliminate the need for user trims. 5. Single 5 V supply simplifies system power requirements. 6. Fast, easy-to-use digital interface allows connection to most popular microprocessors with minimal external components. No clock signal is required for the ADC. |
同様の部品番号 - AD7824KRZ |
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同様の説明 - AD7824KRZ |
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