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MAX1240ACSA+ Equivalent & Substitute Parts
Part Overview
The MAX1240ACSA+ is a 12-bit Analog-to-Digital Converter (ADC) manufactured by Analog Devices Inc./Maxim Integrated, designed for single-ended input data acquisition applications. This component features a Successive Approximation Register (SAR) architecture with SPI digital interface and operates across a 2.7V to 3.6V supply voltage range. The MAX1240ACSA+ is classified as obsolete, making identification of active equivalent parts essential for new designs and production continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Resolution | 12 Bit |
| Sampling Rate | 73 kSPS |
| Number of Inputs | 1 |
| Input Type | Single Ended |
| Data Interface | SPI |
| Architecture | SAR |
| Reference Type | External, Internal |
| Analog Supply Voltage | 2.7V ~ 3.6V |
| Digital Supply Voltage | 2.7V ~ 3.6V |
| Operating Temperature | 0°C ~ 70°C |
| Package | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the MAX1240ACSA+ are determined by matching the following critical parameters:
- Resolution & Sampling Rate: 12-bit resolution at 73 kSPS
- Input Configuration: Single-ended input with 1 ADC channel
- Digital Interface: SPI protocol
- Architecture: SAR-based conversion
- Reference Options: External and internal reference support
- Supply Voltage Range: 2.7V to 3.6V for both analog and digital supplies
- Package & Pinout: 8-SOIC form factor with identical pin configuration
- Environmental Compliance: ROHS3 compliance and MSL Level 1 rating
The MAX1240BCSA+ and MAX1240CCSA+ meet all these parameters identically to the MAX1240ACSA+, with the primary distinction being product status and temperature grade designation (indicated by the letter suffix).
Parameter Comparison
| Parameter | MAX1240ACSA+ | MAX1240BCSA+ | MAX1240CCSA+ |
|---|---|---|---|
| Manufacturer | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated |
| Product Status | Obsolete | Active | Active |
| Resolution | 12 Bit | 12 Bit | 12 Bit |
| Sampling Rate | 73 kSPS | 73 kSPS | 73 kSPS |
| Number of Inputs | 1 | 1 | 1 |
| Input Type | Single Ended | Single Ended | Single Ended |
| Data Interface | SPI | SPI | SPI |
| Architecture | SAR | SAR | SAR |
| Reference Type | External, Internal | External, Internal | External, Internal |
| Analog Supply Voltage | 2.7V ~ 3.6V | 2.7V ~ 3.6V | 2.7V ~ 3.6V |
| Digital Supply Voltage | 2.7V ~ 3.6V | 2.7V ~ 3.6V | 2.7V ~ 3.6V |
| Operating Temperature | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
| Inventory Status | 970 Pcs New Original In Stock | 2900 Pcs New Original In Stock | 918 Pcs New Original In Stock |
Engineering Selection Recommendations
For applications currently using the MAX1240ACSA+, the MAX1240BCSA+ and MAX1240CCSA+ are direct parametric equivalents. Both substitute parts maintain identical electrical specifications, package configuration, and compliance certifications.
The primary selection criterion is product status: MAX1240BCSA+ and MAX1240CCSA+ are active products with ongoing manufacturer support, whereas MAX1240ACSA+ is obsolete. For new designs or production continuity, selection between MAX1240BCSA+ and MAX1240CCSA+ should be based on availability and supply chain requirements, as both parts are functionally interchangeable within the specified operating parameters.
All three variants maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with standard manufacturing and storage protocols.
Frequently Asked Questions (FAQ)
Q: Are MAX1240BCSA+ and MAX1240CCSA+ pin-for-pin compatible with MAX1240ACSA+?
A: Yes. All three parts use the 8-SOIC package with identical pinout and electrical interface specifications. Direct PCB substitution is supported without layout modifications.
Q: What is the functional difference between MAX1240ACSA+, MAX1240BCSA+, and MAX1240CCSA+?
A: There is no functional difference. All three parts share identical electrical specifications, including 12-bit resolution, 73 kSPS sampling rate, SPI interface, and supply voltage range. The letter suffix indicates temperature grade and product lifecycle status only.
Q: Can I substitute an obsolete MAX1240ACSA+ with an active MAX1240BCSA+ or MAX1240CCSA+ in existing designs?
A: Yes. The parametric equivalence is complete across all critical specifications. No design changes are required for direct substitution.
Q: Are there any package or compliance differences between these parts?
A: No. All three variants are supplied in 8-SOIC packaging, maintain ROHS3 compliance, and carry MSL Level 1 rating. Moisture sensitivity and environmental handling requirements are identical.
Q: Which substitute part should I select for new production?
A: Either MAX1240BCSA+ or MAX1240CCSA+ is appropriate for new designs. Both are active products. Selection should be based on availability, lead time, and supply chain considerations, as electrical and mechanical specifications are identical.
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