Not the part you were looking for?
Ask a Question
Submit your question below and we will return the best answer from ADI’s knowledge database:
Search
Other places you can find help
Support
Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.
Visit the ADI Support Page
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
- Automatic Power-Down at the End of Conversion
- On-Chip Reference (2.5 V)
- Wide Operating Supply Range
3 V ± 10% and 5 V ± 10% - Input Ranges:
0 V to 2 Vp-p, VDD = 3 V ± 10%
0 V to 2.5 Vp-p, VDD = 5 V ± 10% - Flexible Parallel Interface with EOC Pulse to Allow Stand-Alone Operation
.svg?rev=fd385c90e2cf4716ae9a8c8d20e6b8e3&la=en&h=24&w=24&hash=A302DF48F94BAAA11877AF223F27157A){kind=icon}
The AD7822 / AD7825 / AD7829 are high speed, 1-, 4-, and 8-channel, microprocessor-compatible, 8-bit analog-to-digital converters with a maximum throughput of 2 MSPS. The AD7822 / AD7825 / AD7829 contain an on-chip reference of 2.5 V (2% tolerance); a track-and-hold amplifier; a 420 ns, 8-bit half-flash ADC; and a high speed parallel interface. The converters can operate from a single 3 V ± 10% and 5 V ± 10% supply.
The AD7822/AD7825/AD7829 combine the convert start and power-down functions at one pin, that is, the CONVST pin. This allows a unique automatic power-down at the end of a conversion to be implemented. The logic level on the CONVST pin is sampled after the end of a conversion when an EOC (end of conversion) signal goes high. If it is logic low at that point, the ADC is powered down. The AD7822 and AD7825 also have a separate power-down pin (see the Operating Modes section).
The parallel interface is designed to allow easy interfacing to microprocessors and DSPs. Using only address decoding logic, the parts are easily mapped into the microprocessor address space. The EOC pulse allows the ADCs to be used in a stand-alone manner (see the Parallel Interface section.)
The AD7822 and AD7825 are available in 20-lead and 24-lead, 0.3" wide, plastic dual in-line packages (PDIP); 20-lead and 24-lead standard small outline packages (SOIC); and 20-lead and 24-lead thin shrink small outline packages (TSSOP). The AD7829 is available in a 28-lead, 0.6" wide PDIP; a 28-lead SOIC; and a 28-lead TSSOP.
PRODUCT HGHLIGHTS
- Fast Conversion Time. The AD7822 / AD7825 / AD7829 have a conversion time of 420 ns. Faster conversion times maximize the DSP processing time in a real-time system.
- Analog Input Span Adjustment. The VMID pin allows the user to offset the input span. This feature can reduce the requirements of single-supply op amps and take into account any system offsets.
- FPBW (Full Power Bandwidth) of Track-and-Hold. The track-and-hold amplifier has an excellent high frequency performance. The AD7822 / AD7825 / AD7829 are capable of converting full-scale input signals up to a frequency of 10 MHz. This makes the parts ideally suited to subsampling applications.
- Channel Selection. Channel selection is made without the necessity of writing to the part.
APPLICATIONS
- Data acquisition systems, DSP front ends
- Disk drives
- Mobile communication systems, subsampling applications
Ask a Question
Submit your question below and we will return the best answer from ADI’s knowledge database:
Search
Other places you can find help
Support
Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.
Visit the ADI Support Page
{{modalTitle}}
{{modalDescription}}
{{dropdownTitle}}
- {{defaultSelectedText}} {{#each projectNames}}
- {{name}} {{/each}} {{#if newProjectText}}
-
{{newProjectText}}
{{/if}}
{{newProjectTitle}}
{{projectNameErrorText}}
AD7822
Documentation
Filters
1 Applied
-
All
-
Application Note
-
Data Sheet
-
Technical Articles
-
All
-
English
-
Chinese
-
Japanese
Data Sheet
1
Application Note
3
Technical Articles
3
HTML
HTML
HTML
Documentation
Data Sheet 1
Application Note 2
Technical Articles 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| AD7822BNZ |
20-Lead PDIP
|
|
|
| AD7822BRUZ |
20-Lead TSSOP
|
|
|
| AD7822BRZ |
20-Lead SOIC (Wide)
|
|
|
| AD7822BRZ-REEL |
20-Lead SOIC (Wide)
|
|
|
| AD7822BRZ-REEL7 |
20-Lead SOIC (Wide)
|
|
- AD7822BNZ
- Pin/Package Drawing
-
20-Lead PDIP
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
- AD7822BRUZ
- Pin/Package Drawing
-
20-Lead TSSOP
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
- AD7822BRZ
- Pin/Package Drawing
-
20-Lead SOIC (Wide)
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
- AD7822BRZ-REEL
- Pin/Package Drawing
-
20-Lead SOIC (Wide)
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
- AD7822BRZ-REEL7
- Pin/Package Drawing
-
20-Lead SOIC (Wide)
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
Filter by Model
Part Models
Product Lifecycle
PCN
Mar 7, 2019
- 19_0046
Assembly Transfer of 18,20,24,28 Lead PDIP to Cirtek
Feb 8, 2010
- 04_0080
Qualification of the 8" C6 and Q Wafer Fab Processes at Analog Devices, Limerick, Ireland.
AD7822BNZ
PRODUCTION
AD7822BRUZ
PRODUCTION
AD7822BRZ
PRODUCTION
AD7822BRZ-REEL
PRODUCTION
AD7822BRZ-REEL7
PRODUCTION
Aug 19, 2009
- 07_0024
Package Material Changes for SOT23, MiniSO, MQFP, PDIP, PLCC, SOIC (narrow and wide body), SSOP, TSSOP and TSSOP exposed pad
AD7822BNZ
PRODUCTION
Feb 11, 2011
- 10_0005
Halogen Free Material Change for TSSOP Products Assembled at Amkor
AD7822BRUZ
PRODUCTION
Feb 7, 2011
- 10_0003
Halogen Free Material Change for SOIC Wide Body Products Assembled at Amkor
AD7822BRZ
PRODUCTION
AD7822BRZ-REEL
PRODUCTION
AD7822BRZ-REEL7
PRODUCTION
Filter by Model
Part Models
Product Lifecycle
PCN
Mar 7, 2019
- 19_0046
Assembly Transfer of 18,20,24,28 Lead PDIP to Cirtek
Feb 8, 2010
- 04_0080
Qualification of the 8" C6 and Q Wafer Fab Processes at Analog Devices, Limerick, Ireland.
AD7822BNZ
PRODUCTION
AD7822BRUZ
PRODUCTION
AD7822BRZ
PRODUCTION
AD7822BRZ-REEL
PRODUCTION
AD7822BRZ-REEL7
PRODUCTION
Aug 19, 2009
- 07_0024
Package Material Changes for SOT23, MiniSO, MQFP, PDIP, PLCC, SOIC (narrow and wide body), SSOP, TSSOP and TSSOP exposed pad
AD7822BNZ
PRODUCTION
Feb 11, 2011
- 10_0005
Halogen Free Material Change for TSSOP Products Assembled at Amkor
Feb 7, 2011
- 10_0003
Halogen Free Material Change for SOIC Wide Body Products Assembled at Amkor
AD7822BRZ
PRODUCTION
AD7822BRZ-REEL
PRODUCTION
AD7822BRZ-REEL7
PRODUCTION
