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AD7653ASTZRL Equivalent & Substitute Parts
Part Overview
The AD7653ASTZRL is a 16-bit Analog to Digital Converter (ADC) manufactured by Analog Devices Inc., designed for single-channel data acquisition applications. It features a Successive Approximation Register (SAR) architecture with 1 MHz sampling rate and operates from dual 5V supplies. The device is housed in a 48-LQFP package and supports multiple data interfaces including SPI, Parallel, and DSP protocols.
The AD7653ASTZRL has reached obsolete product status. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this component.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Resolution | 16 Bit |
| Sampling Rate | 1 MHz |
| Number of Inputs | 1 |
| Input Type | Pseudo-Differential |
| Architecture | SAR |
| Data Interface | SPI, Parallel, DSP |
| Configuration | S/H-ADC |
| Reference Type | External, Internal |
| Analog Supply Voltage | 5V |
| Digital Supply Voltage | 5V |
| Operating Temperature Range | -40°C to 85°C |
| Package Type | 48-LQFP (7x7) |
| Mounting Type | Surface Mount |
| Moisture Sensitivity Level | MSL 3 (168 Hours) |
Substitute Part Grouping Explanation
The AD7667ASTZRL qualifies as a parametric equivalent to the AD7653ASTZRL based on the following critical substitution criteria:
Electrical Parameters Match:
- 16-bit resolution
- 1 MHz sampling rate
- Single pseudo-differential input
- SAR architecture
- Identical data interfaces (SPI, Parallel, DSP)
- Matching S/H-ADC configuration with 1:1 ratio
- Dual 5V supply requirements (analog and digital)
- Identical operating temperature range (-40°C to 85°C)
Mechanical & Package Compatibility:
- 48-LQFP (7x7) package footprint
- Surface mount mounting type
- MSL 3 moisture sensitivity rating
Key Distinction: The AD7667ASTZRL maintains active product status with current manufacturing support, whereas the AD7653ASTZRL is obsolete. Both devices share identical functional specifications and pinout compatibility.
Parameter Comparison
| Parameter | AD7653ASTZRL | AD7667ASTZRL |
|---|---|---|
| Manufacturer | Analog Devices Inc. | Analog Devices Inc. |
| Product Status | Obsolete | Active |
| Resolution (Bits) | 16 | 16 |
| Sampling Rate | 1 MHz | 1 MHz |
| Number of Inputs | 1 | 1 |
| Input Type | Pseudo-Differential | Pseudo-Differential |
| Architecture | SAR | SAR |
| Data Interface | SPI, Parallel, DSP | SPI, Parallel, DSP |
| Configuration | S/H-ADC | S/H-ADC |
| Reference Type | External, Internal | External, Internal |
| Analog Supply Voltage | 5V | 5V |
| Digital Supply Voltage | 5V | 5V |
| Operating Temperature | -40°C to 85°C | -40°C to 85°C |
| Package / Case | 48-LQFP (7x7) | 48-LQFP (7x7) |
| Mounting Type | Surface Mount | Surface Mount |
| MSL Rating | 3 (168 Hours) | 3 (168 Hours) |
| RoHS Status | Not specified | ROHS3 Compliant |
| REACH Status | Not specified | REACH Unaffected |
Engineering Selection Recommendations
The AD7667ASTZRL is the direct substitute for the obsolete AD7653ASTZRL. Selection is based on the following engineering criteria:
Product Status & Availability: The AD7667ASTZRL maintains active manufacturing status with documented inventory availability, ensuring long-term supply chain continuity compared to the obsolete AD7653ASTZRL.
Regulatory Compliance: The AD7667ASTZRL carries ROHS3 compliance certification and REACH unaffected status, meeting current environmental and regulatory requirements for new designs and production runs.
Functional Equivalence: All electrical, mechanical, and thermal specifications are identical between the two devices. Pin-for-pin compatibility and identical package footprints enable direct substitution without circuit redesign.
Export Classification: Both devices share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications, maintaining consistent export compliance requirements.
Frequently Asked Questions (FAQ)
Q: Can the AD7667ASTZRL be used as a direct replacement for the AD7653ASTZRL?
A: Yes. The AD7667ASTZRL is a direct parametric equivalent with identical electrical specifications, pinout, and package footprint. No circuit modifications are required for substitution.
Q: What is the primary reason to substitute the AD7653ASTZRL?
A: The AD7653ASTZRL has reached obsolete status. The AD7667ASTZRL provides equivalent functionality with active manufacturing support and current availability.
Q: Are there any differences in supply voltage requirements?
A: No. Both devices require identical dual 5V supplies for analog and digital circuits and operate across the same temperature range (-40°C to 85°C).
Q: Do the devices support the same data interfaces?
A: Yes. Both the AD7653ASTZRL and AD7667ASTZRL support SPI, Parallel, and DSP data interfaces with identical configuration and timing specifications.
Q: Is the package footprint identical?
A: Yes. Both devices use the 48-LQFP (7x7) surface mount package with identical pinout and mechanical dimensions.
Q: What compliance certifications does the AD7667ASTZRL carry?
A: The AD7667ASTZRL is ROHS3 compliant and REACH unaffected, meeting current environmental regulations for component manufacturing and use.
Q: Are there any moisture sensitivity considerations?
A: Both devices carry an MSL 3 rating with a 168-hour moisture absorption limit. Identical handling and storage protocols apply to both parts.
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