ADS774KP Equivalent & Substitute Parts

Part Overview

The ADS774KP is a 12-bit Analog to Digital Converter (ADC) manufactured by Texas Instruments, featuring a single-ended input with SAR (Successive Approximation Register) architecture and parallel data interface. This device is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production support. The ADS774KP operates with external or internal reference voltage and is rated for industrial temperature ranges (-40°C to 85°C).

Substiute Parts

ADS774KP

Texas InstrumentsIn Stock: 5724ADS774KP Datasheet

Current PartRFQ

MAX174ACPI+

Analog Devices Inc./Maxim IntegratedIn Stock: 779MAX174ACPI+ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ADS774KP is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Resolution: 12 bits
• Sampling Rate: 125 kSPS minimum
• Input Configuration: Single-ended input
• Data Interface: Parallel output
• Architecture: SAR-based conversion
• Package: 28-DIP form factor
• Mounting: Through-hole compatibility

Acceptable Variations:

• Reference Type: Internal reference is acceptable as a substitute for external/internal switchable designs
• Supply Voltage Range: Substitute parts may operate on reduced or different supply voltage ranges provided core 5V digital supply is maintained
• Operating Temperature: Substitute parts with narrower temperature ranges (0°C to 70°C) are acceptable for commercial applications where the original industrial range (-40°C to 85°C) is not required
• Product Status: Active status substitutes are preferred over obsolete parts

The MAX174ACPI+ meets all critical matching parameters and qualifies as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

The MAX174ACPI+ is the qualified substitute for the ADS774KP based on the following engineering criteria:

Functional Equivalence: Both devices share identical resolution (12-bit), sampling rate (125 kSPS), input configuration (single-ended), data interface (parallel), and SAR architecture. Pin-compatible 28-DIP packaging ensures direct board-level replacement without layout modifications.

Product Status Advantage: The MAX174ACPI+ carries active product status, ensuring long-term availability, manufacturing support, and continued compliance updates. The ADS774KP's obsolete status creates supply chain risk and limits access to new inventory.

Compliance Alignment: Both parts maintain ROHS3 compliance and identical ECCN/HTSUS classifications, supporting regulatory consistency in production environments.

Reference Architecture Consideration: The MAX174ACPI+ integrates an internal reference, eliminating the need for external reference components in designs where the ADS774KP's switchable reference capability is not required. This simplifies board design and reduces component count.

Temperature Range Limitation: The MAX174ACPI+ operates within 0°C to 70°C, restricting use to commercial temperature applications. Designs requiring the full industrial range (-40°C to 85°C) must verify alternative substitutes or retain the ADS774KP through inventory management.

Frequently Asked Questions (FAQ)

Q: Can the MAX174ACPI+ directly replace the ADS774KP on existing PCBs?

A: Yes. Both devices use identical 28-DIP packaging with matching pin assignments for 12-bit parallel data output, control signals, and power connections. No PCB modifications are required for physical replacement.

Q: What is the key difference between the ADS774KP and MAX174ACPI+ reference architecture?

A: The ADS774KP supports both external and internal reference voltage selection, providing design flexibility. The MAX174ACPI+ features an integrated internal reference only. Applications requiring external reference voltage control must evaluate alternative substitutes or redesign the reference circuit.

Q: Is the MAX174ACPI+ suitable for industrial temperature applications?

A: No. The MAX174ACPI+ is rated for 0°C to 70°C commercial operation. Applications requiring -40°C to 85°C industrial temperature range must source the ADS774KP through inventory channels or identify alternative 12-bit SAR ADCs with extended temperature specifications.

Q: Are there supply voltage compatibility concerns?

A: The MAX174ACPI+ supports multiple supply voltages (5V, -12V, -15V) compared to the ADS774KP's 5V and -16.5V to 5.5V range. For standard 5V digital logic systems, both devices are compatible. Designs using negative supply rails should verify the MAX174ACPI+ voltage specifications against circuit requirements.

Q: What is the moisture sensitivity difference between these parts?

A: The ADS774KP carries MSL 3 (168 hours), while the MAX174ACPI+ carries MSL 1 (unlimited). The MAX174ACPI+ offers superior moisture tolerance, reducing handling and storage constraints in manufacturing environments.

Q: Are both parts RoHS compliant?

A: Yes. Both the ADS774KP and MAX174ACPI+ are ROHS3 compliant, supporting equivalent regulatory requirements in end-market applications.