AD7824 - Analog Devices

AD7824 High Speed 4- and 8-Channel 8-Bit ADCs

The AD7824 and AD7828 are high speed, multichannel, 8-bit ADCs with a choice of four (AD7824) or eight (AD7828) multiplexed 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 .

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 LC2MOS High Speed 4- and 8-Channel 8-Bit ADCs AD7824/AD7828 FUNCTIONAL BLOCK DIAGRAM VREF (+) VREF (
  –) AIN1 4-BIT FLASH ADC (4MSB) DB7 DB6 DB5 DB4 AIN4 MUX
* AIN8 VREF (+) 16 4-BIT DAC 4-BIT FLASH ADC (4LSB) THREESTATE DRIVERS ADDRESS LATCH DECODE A0 A1 A2
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*AD7824
  – 4-CHANNEL MUX
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*AD7828
  – 8-CHANNEL MUX A2
  – AD7828 ONLY TIMING AND CONTROL CIRCUIT.