AD7829-1
PRODUCTION3 V/5 V, 2 MSPS, 8-Bit, 8-Channel ADC
- Part Models
- 4
- 1ku List Price
- Starting From $4.12
Part Details
- 8-bit half-flash ADC with 420 ns conversion time
- Eight single-ended analog input channels
Available with input offset adjust - SNR performance given for input frequencies up to 10 MHz
- Automatic power-down at the end of conversion
- Flexible parallel interface with EOC pulse to allow stand-alone operation
- On-chip track-and-hold
- 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%
The AD7829-1 is a high speed 8-channel, microprocessor-compatible, 8-bit analog-to-digital converter with a maximum throughput of 2 MSPS. The AD7829-1 contains an on-chip reference of 2.5 V (2% tolerance); a track/hold amplifier; a 420 ns, 8-bit half-flash ADC; and a high speed parallel interface. The converter can operate from a single 3 V ± 10% and 5 V ± 10% supply.
The AD7829-1 combines 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, and if it is logic low at that point, the ADC is powered down. 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 AD7829-1 is available in a 28-lead, wide body, small outline IC (SOIC_W) and a 28-lead thin shrink small outline package (TSSOP).
PRODUCT HIGHLIGHTS
- Fast Conversion Time. The AD7829-1 has 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 excellent high frequency performance. The AD7829-1 is capable of converting fullscale input signals up to a frequency of 10 MHz, making 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
Documentation
Data Sheet 1
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 |
|---|---|---|---|
| AD7829BRUZ-1 | 28-Lead TSSOP (4.4mm x 9.7mm) | ||
| AD7829BRUZ-1REEL7 | 28-Lead TSSOP (4.4mm x 9.7mm) | ||
| AD7829BRWZ-1 | 28-Lead SOIC (Wide) | ||
| AD7829BRWZ-1RL7 | 28-Lead SOIC (Wide) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Feb 11, 2011 - 10_0005 Halogen Free Material Change for TSSOP Products Assembled at Amkor |
||
| AD7829BRUZ-1 | PRODUCTION | |
| AD7829BRUZ-1REEL7 | PRODUCTION | |
|
Feb 8, 2010 - 04_0080 Qualification of the 8" C6 and Q Wafer Fab Processes at Analog Devices, Limerick, Ireland. |
||
| AD7829BRUZ-1 | PRODUCTION | |
| AD7829BRWZ-1 | PRODUCTION | |
|
Jul 21, 2014 - 13_0297 Qualification of ASE Chungli, as an Alternate Assembly Site for Select 16L, 20L, 24L and 28L SOICW Packages |
||
| AD7829BRWZ-1 | PRODUCTION | |
| AD7829BRWZ-1RL7 | PRODUCTION | |
|
Aug 4, 2010 - 10_0117 Halogen Free Material Change for SOIC_W Products at Carsem |
||
| AD7829BRWZ-1 | PRODUCTION | |
| AD7829BRWZ-1RL7 | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.