Hot-selling and scarce AD7829BRUZ 3 V/5 V, 2 MSPS, 8-Bit, 1-, 4-, 8-Channel Sampling ADCs TSSOP28 spot stock

Product Descriptions

The AD7822, AD7825, and AD7829 are high speed, 1-, 4-, and8-channel, microprocessor-compatible, 8-bit analog-to-digitalconverters with a maximum throughput of 2 MSPS .The AD7822,AD7825, and AD7829 contain an on-chip reference of 2.5 V(2% tolerance), a track/hold amplifier, a 420 ns 8-bit half-flashADC and a high speed parallel interface . The converters canoperate from a single 3 V ± 10% and 5 V ± 10% supply .

The AD7822, AD7825, and AD7829 combine the convert startand power-down functions at one pin, i .e ., the CONVST pin .This allows a unique automatic power-down at the end of aconversion to be implemented . The logic level on the CONVSTpin is sampled after the end of a conversion when an EOC (Endof Conversion) signal goes high, and if it is logic low at thatpoint, the ADC is powered down . The AD7822 and AD7825also have a separate power-down pin . (See Operating Modessection of the data sheet.)

The parallel interface is designed to allow easy interfacing tomicroprocessors and DSPs . Using only address decoding logic,the parts are easily mapped into the microprocessor addressspace . The EOC pulse allows the ADCs to be used in a standalone manner . 

Product Features

8-Bit Half-Flash ADC with 420 ns Conversion Time

1, 4 and 8 Single-Ended Analog Input Channels

Available with Input Offset Adjust

On-Chip Track-and-Hold

SNR Performance Given for Input Frequencies Up to

10 MHz

On-Chip Reference (2.5 V)

Automatic Power-Down at the End of Conversion

Wide Operating Supply Range

3 V   10% and 5 V   10%

Input Ranges

0 V to 2 V p-p, VDD = 3 V   10%

0 V to 2.5 V p-p, VDD = 5 V   10%

Flexible Parallel Interface with EOC Pulse to Allow

Stand-Alone Operation

Product Applications

Data Acquisition Systems, DSP Front Ends

Disk Drives

Mobile Communication Systems, Subsampling Applications

Product Specification

Product Photos

For more product information, please download the PDF