ADS7841PB Equivalent & Substitute Parts

Part Overview

The ADS7841PB is a 12-bit Analog to Digital Converter (ADC) manufactured by Texas Instruments, designed for data acquisition applications requiring 4 single-ended inputs with a 200 kSPS sampling rate. The device features a SAR (Successive Approximation Register) architecture with external reference capability and SPI digital interface, housed in a 16-pin DIP package for through-hole mounting.

The ADS7841PB is classified as obsolete. Identifying functionally equivalent substitute parts is necessary to support legacy system maintenance, design updates, and procurement continuity when original inventory becomes unavailable.

Substiute Parts

ADS7841PB

Texas InstrumentsIn Stock: 848ADS7841PB Datasheet

Current PartRFQ

ADS7841E

Texas InstrumentsIn Stock: 20797ADS7841E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ADS7841PB are identified based on electrical and functional equivalence across the following critical parameters:

• Resolution & Sampling Rate: 12-bit resolution at 200 kSPS
• Channel Configuration: 4 single-ended inputs with integrated multiplexer and sample-and-hold
• Architecture: SAR-based analog-to-digital conversion
• Digital Interface: SPI protocol compatibility
• Supply Voltage Compatibility: Dual supply operation at 2.7V–3.6V and 5V
• Operating Temperature: Full industrial range (–40°C to +125°C)
• Reference Architecture: External reference input

The ADS7841E qualifies as a direct functional substitute, maintaining identical electrical specifications and performance characteristics. The primary distinction is packaging format: the ADS7841PB uses through-hole 16-DIP, while the ADS7841E uses surface-mount 16-SSOP.

Parameter Comparison

Engineering Selection Recommendations

The ADS7841E is the direct functional equivalent for the ADS7841PB. Both devices share identical electrical specifications, performance characteristics, and compliance certifications (ROHS3, REACH Unaffected, EAR99 classification).

Selection between these parts depends on board-level design constraints:

• Through-Hole Requirement: The ADS7841PB (16-DIP) is suitable for through-hole PCB designs and breadboard prototyping. However, as an obsolete product, long-term availability is limited.

• Surface-Mount Requirement: The ADS7841E (16-SSOP) is the active production alternative, offering superior availability and supporting modern surface-mount assembly processes. This part is recommended for new designs and legacy system updates.

• Compliance & Certification: Both parts maintain ROHS3 compliance and identical MSL ratings, ensuring compatibility with current manufacturing and environmental standards.

Frequently Asked Questions (FAQ)

Q: Can the ADS7841E directly replace the ADS7841PB in an existing design?

A: Electrical and functional replacement is direct. The ADS7841E maintains identical pin functionality, signal levels, timing, and protocol compliance. However, the package format differs: ADS7841PB uses 16-DIP (through-hole), while ADS7841E uses 16-SSOP (surface-mount). PCB layout and assembly method must accommodate the surface-mount package.

Q: What are the key electrical parameters that define substitution compatibility?

A: Substitution is valid when the following parameters match: 12-bit resolution, 200 kSPS sampling rate, 4 single-ended inputs, SPI interface, SAR architecture, external reference capability, and dual supply voltage operation (2.7V–3.6V and 5V). Both parts meet these criteria.

Q: Why is the ADS7841PB classified as obsolete?

A: The ADS7841PB (16-DIP through-hole package) has been superseded by the ADS7841E (16-SSOP surface-mount package) as manufacturing has shifted toward surface-mount technology. The ADS7841E provides identical functionality with improved availability and modern assembly compatibility.

Q: Are there any compliance or certification differences between these parts?

A: No. Both the ADS7841PB and ADS7841E carry identical certifications: ROHS3 compliance, REACH Unaffected status, EAR99 export classification, and MSL rating of 2 (1 Year). Compliance requirements do not restrict substitution.

Q: What is the primary consideration when selecting between these parts?

A: The primary consideration is mounting technology. Select ADS7841PB for through-hole designs; select ADS7841E for surface-mount designs. Given the obsolete status of the ADS7841PB, the ADS7841E is recommended for all new designs and system updates requiring this functionality.