AD7820
NOT RECOMMENDED FOR NEW DESIGNS8-Bit, 2µS, Sampling A/D Converter
- Part Models
- 12
- 1ku List Price
- Starting From $18.28
Overview
- Fast Conversion Time: 1.36 µs max
- Built-In Track-and-Hold Function
- No Missed Codes
- No User Trims Required
- Single +5V Supply
- Ratiometric Operation
- No External Clock
- Extended Temperature Range Operation
- Skinny 20-Pin DIP, SOIC and 20-Terminal Surface Mount Packages
The AD7820 is a high speed, microprocessor-compatible 8-bit ADC which uses a half-flash conversion technique to achieve a conversion time of 1.36 µs. The converter has a 0 V to +5 V analog input voltage range with a single +5 V supply.
The half-flash technique consists of 31 comparators, a most significant 4-bit ADC and a least significant 4-bit ADC. The input to the AD7820 is tracked and held by the input sampling circuitry, eliminating the need for an external sample-and-hold for signals with slew rates less than 100 mV/µs.
The part is designed for ease of microprocessor interface with the AD7820 appearing as a memory location or I/O port without the need for external interfacing logic. All digital outputs use latched, three-state output buffer circuitry to allow direct connection to a microprocessor data bus or system input port. A non-three state overflow output is also provided to allow cascading of devices to give higher resolution.
Documentation
Data Sheet 2
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 |
|---|---|---|---|
| 5962-8865001RA | 20 ld CerDIP | ||
| 5962-88650022A | 20 ld LCC | ||
| 5962-8865002RA | 20 ld CerDIP | ||
| AD7820CQ | 20 ld CerDIP | ||
| AD7820KNZ | 20-Lead PDIP | ||
| AD7820KPZ | 20-Lead Flatpack | ||
| AD7820KRZ | 20-Lead SOIC (Wide) | ||
| AD7820KRZ-REEL | 20-Lead SOIC (Wide) | ||
| AD7820LNZ | 20-Lead PDIP | ||
| AD7820LRZ | 20-Lead SOIC (Wide) | ||
| AD7820LRZ-REEL | 20-Lead SOIC (Wide) | ||
| AD7820TQ | 20 ld CerDIP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 9, 2018 - 16_0026 Qualify TeamQuest Technology, Inc. for Burn-in and Life Test of Military and Aerospace Devices |
||
| 5962-8865001RA | ||
| 5962-88650022A | ||
| 5962-8865002RA | ||
|
Nov 7, 2012 - 12_0199 Qualification of New Conductive Silver-Filled Glass Die Attach Adhesive for Cerdip and Ceramic Flatpack (Cerpack) Packages. |
||
| 5962-8865001RA | ||
| 5962-8865002RA | ||
| AD7820CQ | ||
| AD7820TQ | ||
|
Nov 9, 2011 - 11_0050 Transfer of ADI Hermetics Assembly location from Paranaque, Manila to General Trias, Cavite Philippines |
||
| 5962-8865001RA | ||
| 5962-8865002RA | ||
| AD7820CQ | ||
| AD7820TQ | ||
|
Nov 9, 2011 - 11_0182 Test Site Transfer from Analog Devices Philippines Inc in Paranaque to Analog Devices General Trias in Cavite, Philippines |
||
| 5962-8865001RA | ||
| 5962-8865002RA | ||
| AD7820CQ | ||
| AD7820TQ | ||
|
Feb 1, 2010 - 10_0020 Test Solutions Services, Inc.(TSSI) as Subcontractor Burn-in Facility. |
||
| 5962-88650022A | ||
|
Mar 7, 2019 - 19_0046 Assembly Transfer of 18,20,24,28 Lead PDIP to Cirtek |
||
| AD7820KNZ | ||
| AD7820LNZ | ||
|
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 |
||
| AD7820KNZ | ||
| AD7820LNZ | ||
|
Feb 7, 2011 - 10_0003 Halogen Free Material Change for SOIC Wide Body Products Assembled at Amkor |
||
| AD7820KRZ | ||
| AD7820KRZ-REEL | ||
| AD7820LRZ | ||
| AD7820LRZ-REEL | ||
This is the most up-to-date revision of the Data Sheet.