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MAX188BCAP Equivalent & Substitute Parts
Part Overview
The MAX188BCAP is a 12-bit Analog-to-Digital Converter (ADC) manufactured by Analog Devices Inc./Maxim Integrated, designed for data acquisition applications requiring serial interface communication. This SAR (Successive Approximation Register) architecture device supports both differential and single-ended inputs with a sampling rate of 133 kSPS and operates on dual supply voltages (±5V). The MAX188BCAP is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support, maintenance, and new design implementations where legacy compatibility is required.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | MAX188BCAP |
| Manufacturer | Analog Devices Inc./Maxim Integrated |
| Resolution (Bits) | 12 |
| Sampling Rate | 133 kSPS |
| 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 | 0°C ~ 70°C |
| Package | 20-SSOP (0.209", 5.30mm Width) |
| Mounting Type | Surface Mount |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution eligibility for the MAX188BCAP is determined by strict alignment of the following critical parameters:
- Resolution: 12-bit ADC architecture
- Sampling Rate: 133 kSPS minimum performance
- Input Configuration: Support for 4 or 8 channels with differential and single-ended input capability
- Data Interface: SPI-compatible serial communication (including MICROWIRE™, QSPI™, Serial variants)
- Supply Voltage: Dual ±5V supply compatibility
- Package: 20-SSOP form factor with identical pinout and mechanical dimensions
- Operating Temperature Range: 0°C ~ 70°C minimum coverage
The MAX188BCAP+ qualifies as a direct substitute based on matching all critical electrical and mechanical parameters while maintaining functional equivalence in data acquisition applications.
Parameter Comparison
| Parameter | MAX188BCAP (Main Part) | MAX188BCAP+ (Substitute) |
|---|---|---|
| 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 |
| Input Type | Differential, Single Ended | Differential, Single Ended |
| Data Interface | SPI | MICROWIRE™, QSPI™, Serial, SPI™ |
| Voltage Supply (Analog) | ±5V, 5V | ±5V |
| Voltage Supply (Digital) | ±5V, 5V | ±5V |
| Operating Temperature | 0°C ~ 70°C | 0°C ~ 70°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 |
Engineering Selection Recommendations
The MAX188BCAP+ is the qualified substitute for MAX188BCAP applications based on the following engineering criteria:
Electrical Compatibility: Both devices share identical 12-bit resolution, 133 kSPS sampling rate, and dual ±5V supply voltage specifications. The MAX188BCAP+ supports extended serial interface protocols (MICROWIRE™, QSPI™, Serial, SPI™) while maintaining full SPI backward compatibility with the original MAX188BCAP.
Mechanical Compatibility: Identical 20-SSOP package footprint and pinout ensure direct PCB-level substitution without layout modifications.
Product Status Advantage: The MAX188BCAP+ holds Active product status with ROHS3 compliance, providing long-term availability and regulatory alignment compared to the obsolete MAX188BCAP.
Supply Chain Consideration: Current inventory availability of MAX188BCAP+ (806 units) supports immediate procurement for replacement and new production requirements.
Frequently Asked Questions (FAQ)
Q: Can MAX188BCAP+ replace MAX188BCAP in existing designs without PCB modifications?
A: Yes. Both devices use identical 20-SSOP packaging with matching pinout and mechanical dimensions. Direct board-level substitution is possible without layout changes.
Q: Are the serial interface protocols compatible between MAX188BCAP and MAX188BCAP+?
A: Yes. The MAX188BCAP+ supports SPI protocol alongside MICROWIRE™, QSPI™, and Serial variants. Designs using standard SPI communication with MAX188BCAP will operate without firmware modification.
Q: What is the key difference between MAX188BCAP and MAX188BCAP+?
A: The primary differences are product status (Obsolete vs. Active) and regulatory compliance (RoHS non-compliant vs. ROHS3 Compliant). Electrical and mechanical specifications remain equivalent.
Q: Does the MAX188BCAP+ support the same input channel configuration?
A: The MAX188BCAP+ provides 8-channel capability, which covers the 4 and 8-channel input options of the original MAX188BCAP. Applications using 4-channel configuration will operate within the 8-channel device capability.
Q: What supply voltage options are available for MAX188BCAP+?
A: The MAX188BCAP+ operates on dual ±5V supply, matching the primary supply configuration of MAX188BCAP. Both devices maintain identical analog and digital supply voltage specifications.
Q: Is the operating temperature range identical between both devices?
A: Yes. Both MAX188BCAP and MAX188BCAP+ operate across 0°C to 70°C, ensuring thermal compatibility in equivalent applications.
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