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ADAU1966WBSTZ Equivalent & Substitute Parts
Part Overview
The ADAU1966WBSTZ is a 24-bit digital-to-analog converter (DAC) manufactured by Analog Devices Inc., designed for high-resolution audio and data acquisition applications. This device integrates 16 D/A converters in a 80-LQFP surface mount package and operates across automotive temperature ranges. The part is currently in active production status with full RoHS3 compliance and automotive-grade qualification. Substitute parts are identified when equivalent electrical specifications, package compatibility, and functional capabilities align with the original design requirements.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices Inc. |
| Number of Bits | 24 |
| Number of D/A Converters | 16 |
| Output Type | Voltage - Unbuffered |
| Differential Output | Yes |
| Data Interface | I2C, SPI |
| Reference Type | Internal |
| Architecture | Sigma-Delta |
| Package / Case | 80-LQFP (14x14) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 105°C |
| Grade | Automotive |
| RoHS Status | ROHS3 Compliant |
| MSL Rating | 3 (168 Hours) |
Substitute Part Grouping Explanation
Substitution eligibility for the ADAU1966WBSTZ is determined by the following critical parameters:
- Resolution & Converter Count: 24-bit resolution with 16 D/A converters
- Package Compatibility: 80-LQFP (14x14) surface mount package
- Output Configuration: Voltage-unbuffered differential output
- Data Interface Support: I2C and SPI protocols
- Sigma-Delta Architecture: Matching signal processing topology
- Automotive Grade Qualification: -40°C to 105°C operating range
- Compliance Standards: RoHS3 and automotive-grade certification
The ADAU1966AWBSTZ meets all substitution criteria as it maintains identical resolution, converter count, package form factor, output type, and operating temperature range. Both parts share the same base product number (ADAU1966) and automotive qualification status.
Parameter Comparison
| Parameter | ADAU1966WBSTZ | ADAU1966AWBSTZ | Compatibility |
|---|---|---|---|
| Manufacturer | Analog Devices Inc. | Analog Devices Inc. | Identical |
| Number of Bits | 24 | 24 | Identical |
| Number of D/A Converters | 16 | 16 | Identical |
| Output Type | Voltage - Unbuffered | Voltage - Unbuffered | Identical |
| Differential Output | Yes | Yes | Identical |
| Data Interface | I2C, SPI | I2C, I2S, SPI | Compatible (ADAU1966AWBSTZ adds I2S) |
| Reference Type | Internal | Internal | Identical |
| Architecture | Sigma-Delta | Sigma-Delta | Identical |
| Package / Case | 80-LQFP (14x14) | 80-LQFP (14x14) | Identical |
| Mounting Type | Surface Mount | Surface Mount | Identical |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 105°C | Identical |
| Grade | Automotive | Automotive | Identical |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | Identical |
| MSL Rating | 3 (168 Hours) | 3 (168 Hours) | Identical |
| Voltage - Supply, Analog | 5V | 3.14V ~ 3.46V | Different operating ranges |
| Voltage - Supply, Digital | 2.25V ~ 3.6V | 2.25V ~ 3.46V | Overlapping range |
Engineering Selection Recommendations
Both the ADAU1966WBSTZ and ADAU1966AWBSTZ are active production parts with identical automotive-grade qualification and RoHS3 compliance. Selection between these parts depends on supply chain availability and specific power supply architecture requirements.
The ADAU1966WBSTZ operates with a 5V analog supply voltage, while the ADAU1966AWBSTZ operates within a 3.14V to 3.46V analog supply range. The digital supply voltage ranges overlap between 2.25V and 3.46V. Verify that your system's power supply architecture aligns with the analog voltage requirements of the selected part before implementation.
The ADAU1966AWBSTZ provides additional I2S data interface support beyond the I2C and SPI protocols available on the ADAU1966WBSTZ. This expanded interface capability does not preclude its use as a substitute in designs requiring only I2C or SPI communication.
Frequently Asked Questions (FAQ)
Q: Can ADAU1966AWBSTZ replace ADAU1966WBSTZ in existing designs?
A: Yes, provided that the system power supply can accommodate the ADAU1966AWBSTZ analog supply voltage range of 3.14V to 3.46V. The ADAU1966WBSTZ requires a 5V analog supply. Both parts share identical resolution, converter count, package form factor, and operating temperature specifications.
Q: What is the primary difference between these two parts?
A: The main differences are the analog supply voltage operating range and data interface support. The ADAU1966AWBSTZ supports I2S in addition to I2C and SPI, while the ADAU1966WBSTZ supports only I2C and SPI. The analog supply voltage differs: 5V for ADAU1966WBSTZ versus 3.14V to 3.46V for ADAU1966AWBSTZ.
Q: Are both parts suitable for automotive applications?
A: Yes. Both the ADAU1966WBSTZ and ADAU1966AWBSTZ carry automotive-grade qualification and operate across the -40°C to 105°C temperature range required for automotive environments.
Q: Do these parts require different PCB layouts?
A: No. Both parts use the identical 80-LQFP (14x14) surface mount package, so PCB footprints and land patterns are identical. Power supply routing and decoupling requirements may differ based on the analog voltage specifications of the selected part.
Q: What is the moisture sensitivity level for these parts?
A: Both parts have an MSL rating of 3 with a 168-hour floor life. Standard moisture control procedures during storage and handling are required.
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