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MAX188AEAP Equivalent & Substitute Parts
Part Overview
The MAX188AEAP is a 12-bit Analog-to-Digital Converter (ADC) manufactured by Analog Devices Inc./Maxim Integrated, designed for data acquisition applications requiring SAR (Successive Approximation Register) architecture with configurable input channels. The device features 4 or 8 single-ended/differential input options, operates at a sampling rate of 133 kSPS, and communicates via SPI interface.
The MAX188AEAP is classified as obsolete. Identifying equivalent substitute parts is necessary to ensure continued availability for new designs, production continuity, and long-term system support where original components are no longer manufactured or stocked.
Substiute Parts
Key Parameters
| Parameter | MAX188AEAP |
|---|---|
| Resolution (Bits) | 12 |
| Sampling Rate (kSPS) | 133 |
| Number of Inputs | 4, 8 |
| Input Type | Differential, Single Ended |
| Data Interface | SPI |
| Architecture | SAR |
| Voltage Supply (Analog) | ±5V, 5V |
| Voltage Supply (Digital) | ±5V, 5V |
| Operating Temperature | -40°C ~ 85°C |
| Package | 20-SSOP |
| Mounting Type | Surface Mount |
Substitute Part Grouping Explanation
Substitution eligibility for the MAX188AEAP is determined by the following critical parameters:
- Resolution: 12-bit conversion capability
- Sampling Rate: 133 kSPS minimum performance
- Input Configuration: Support for 4 or 8 channels with differential and single-ended input modes
- Data Interface: SPI-compatible serial communication protocol
- Architecture: SAR-based analog-to-digital conversion
- Supply Voltage: Dual ±5V or single 5V operation
- Package: 20-SSOP form factor for surface mount applications
- Operating Temperature Range: -40°C to 85°C industrial specification
The MAX188AEAP+ qualifies as a direct substitute based on matching all critical electrical and mechanical parameters while offering improved product status and compliance certifications.
Parameter Comparison
| Parameter | MAX188AEAP | MAX188AEAP+ |
|---|---|---|
| Manufacturer | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated |
| Resolution (Bits) | 12 | 12 |
| Sampling Rate (kSPS) | 133 | 133 |
| Number of Channels | 4, 8 | 8 |
| Data Interface | SPI | MICROWIRE™, QSPI™, Serial, SPI™ |
| Voltage Supply | ±5V, 5V | ±5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Package / Case | 20-SSOP (0.209", 5.30mm Width) | 20-SSOP (0.209", 5.30mm Width) |
| Mounting Type | Surface Mount | Surface Mount |
| Product Status | Obsolete | Active |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant |
| Packaging Option | Not specified | Tube |
Engineering Selection Recommendations
The MAX188AEAP+ is the direct equivalent substitute for the MAX188AEAP. Selection of the MAX188AEAP+ is justified on the following engineering grounds:
Product Status: The MAX188AEAP+ maintains active product status with ongoing manufacturer support and availability, whereas the MAX188AEAP is obsolete and subject to supply discontinuation.
Compliance: The MAX188AEAP+ achieves ROHS3 compliance, meeting current environmental and regulatory requirements for new designs and production. The original MAX188AEAP is non-compliant with modern RoHS standards.
Electrical Equivalence: Both devices maintain identical 12-bit resolution, 133 kSPS sampling rate, and SPI data interface specifications. The MAX188AEAP+ provides extended protocol support (MICROWIRE™, QSPI™, Serial) while maintaining full SPI backward compatibility.
Package Compatibility: Identical 20-SSOP surface mount packaging ensures direct PCB layout compatibility without redesign requirements.
Supply Voltage: Both devices operate on ±5V dual supply configuration, maintaining identical power distribution requirements.
Frequently Asked Questions (FAQ)
Q: Can the MAX188AEAP+ directly replace the MAX188AEAP in existing designs?
A: Yes. The MAX188AEAP+ is electrically and mechanically equivalent. Identical pin configuration, package footprint, and core electrical specifications enable direct substitution without PCB modifications or firmware changes.
Q: What is the difference between the MAX188AEAP and MAX188AEAP+?
A: The primary differences are product status and compliance. The MAX188AEAP+ is an active product with ROHS3 compliance, while the MAX188AEAP is obsolete and RoHS non-compliant. The MAX188AEAP+ also supports additional serial protocols (MICROWIRE™, QSPI™) beyond the base SPI interface.
Q: Are there any supply voltage differences between these parts?
A: The MAX188AEAP supports both ±5V and single 5V operation. The MAX188AEAP+ operates on ±5V dual supply. Verify your circuit design uses ±5V configuration for compatibility.
Q: Does the package change affect PCB assembly?
A: No. Both devices use identical 20-SSOP (0.209", 5.30mm width) surface mount packaging. Existing PCB designs, solder stencils, and pick-and-place programs require no modification.
Q: What is the inventory status for these parts?
A: The MAX188AEAP has 7,135 pieces in stock as new original inventory. The MAX188AEAP+ has 3,300 pieces in stock as new original inventory in tube packaging. Verify current availability with your supplier for production requirements.
Q: Are there any temperature range limitations?
A: Both devices operate across the identical -40°C to 85°C industrial temperature range. No thermal performance differences exist between the parts.
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