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AD7864ASZ-2REEL Equivalent & Substitute Parts
Part Overview
The AD7864ASZ-2REEL is a 12-bit Analog to Digital Converter (ADC) manufactured by Analog Devices Inc., designed for data acquisition applications requiring simultaneous sampling across four single-ended inputs. This component features a SAR (Successive Approximation Register) architecture with a sampling rate of 520 kSPS and operates on 5V supply voltage for both analog and digital domains. The device is currently classified as obsolete, making identification of active equivalent parts essential for ongoing production and design continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | AD7864ASZ-2REEL |
| Manufacturer | Analog Devices Inc. |
| Number of Bits | 12 |
| Sampling Rate (Per Second) | 520k |
| Number of Inputs | 4 |
| Input Type | Single Ended |
| Data Interface | Parallel |
| Architecture | SAR |
| Voltage - Supply, Analog | 5V |
| Voltage - Supply, Digital | 5V |
| Package / Case | 44-QFP |
| Supplier Device Package | 44-MQFP (10x10) |
| Operating Temperature | -40°C ~ 85°C |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution for the AD7864ASZ-2REEL is determined by strict equivalence across the following critical parameters:
- Resolution: 12 bits
- Sampling Rate: 520 kSPS
- Number of Inputs: 4 single-ended channels
- Data Interface: Parallel
- Architecture: SAR with simultaneous sampling capability
- Supply Voltage: 5V (both analog and digital)
- Package: 44-MQFP (10x10)
- Operating Temperature Range: -40°C to 85°C
- Reference Type: External and Internal support
- Configuration: S/H-MUX-ADC with 4:1 ratio
The identified substitutes maintain identical electrical and mechanical specifications. The primary distinction between substitute parts lies in product status (active vs. obsolete) and packaging format (reel configuration).
Parameter Comparison
| Parameter | AD7864ASZ-2REEL | AD7864ASZ-1REEL | AD7864BSZ-1REEL |
|---|---|---|---|
| Manufacturer | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. |
| Number of Bits | 12 | 12 | 12 |
| Sampling Rate (Per Second) | 520k | 520k | 520k |
| Number of Inputs | 4 | 4 | 4 |
| Input Type | Single Ended | Single Ended | Single Ended |
| Data Interface | Parallel | Parallel | Parallel |
| Architecture | SAR | SAR | SAR |
| Voltage - Supply, Analog | 5V | 5V | 5V |
| Voltage - Supply, Digital | 5V | 5V | 5V |
| Package / Case | 44-QFP | 44-QFP | 44-QFP |
| Supplier Device Package | 44-MQFP (10x10) | 44-MQFP (10x10) | 44-MQFP (10x10) |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C |
| Product Status | Obsolete | Active | Active |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) | 3 (168 Hours) | 3 (168 Hours) |
| ECCN | EAR99 | EAR99 | EAR99 |
| HTSUS | 8542.39.0001 | 8542.39.0001 | 8542.39.0001 |
Engineering Selection Recommendations
Both AD7864ASZ-1REEL and AD7864BSZ-1REEL are direct functional equivalents to the obsolete AD7864ASZ-2REEL, with all electrical and mechanical parameters identical. Selection between these active alternatives should be based on the following factors:
AD7864ASZ-1REEL is the primary recommended substitute, maintaining the same part designation suffix while offering active product status and full compliance certifications (ROHS3 Compliant, REACH Unaffected).
AD7864BSZ-1REEL provides an alternative active source with identical specifications and compliance status. The "B" designation indicates a different manufacturing grade or speed bin within the AD7864 family, though all critical parameters remain equivalent.
Both substitutes are available in Tape & Reel packaging format, suitable for automated assembly processes. Inventory availability should be evaluated based on production volume requirements and lead time constraints.
Frequently Asked Questions (FAQ)
Q: Can AD7864ASZ-1REEL or AD7864BSZ-1REEL be used as direct replacements for AD7864ASZ-2REEL?
A: Yes. Both parts are parametric equivalents with identical resolution (12-bit), sampling rate (520 kSPS), input configuration (4 single-ended channels), supply voltage (5V), package (44-MQFP), and operating temperature range (-40°C to 85°C). The primary difference is product status: the original part is obsolete while both substitutes are active.
Q: What is the difference between AD7864ASZ-1REEL and AD7864BSZ-1REEL?
A: Both parts share identical electrical specifications and package format. The designation difference (A vs. B) reflects different manufacturing grades or speed bins within the AD7864 family. All critical parameters for substitution purposes are equivalent.
Q: Are there any compliance or certification differences between the three parts?
A: The obsolete AD7864ASZ-2REEL does not list RoHS or REACH compliance status. Both active substitutes (AD7864ASZ-1REEL and AD7864BSZ-1REEL) are ROHS3 Compliant and REACH Unaffected. All three share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications.
Q: Does the packaging format (reel configuration) affect electrical performance?
A: No. The reel configuration affects only handling and assembly logistics. The electrical and mechanical specifications of the die and package remain identical across all three part numbers.
Q: What is the Moisture Sensitivity Level (MSL) for these parts?
A: All three parts carry MSL 3 (168 Hours), indicating identical moisture handling and storage requirements during assembly processes.
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