LM4140BCM-2.5 Equivalent & Substitute Parts

Part Overview

The LM4140BCM-2.5 is a Series Voltage Reference IC with fixed 2.5V output, ±0.1% tolerance, and 8 mA output current in an 8-SOIC surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The LM4140BCM-2.5/NOPB represents the active production variant of this reference design, while ADR03BRZ and LTC1798CS8-2.5#PBF provide alternative solutions from Analog Devices Inc. with comparable functional performance in the same package footprint.

Substiute Parts

LM4140BCM-2.5

Texas InstrumentsIn Stock: 707LM4140BCM-2.5 Datasheet

Current PartRFQ

LM4140BCM-2.5/NOPB

Texas InstrumentsIn Stock: 1473LM4140BCM-2.5/NOPB Datasheet

DirectRFQ

ADR03BRZ

Analog Devices Inc.In Stock: 6181ADR03BRZ Datasheet

MFR RecommendedRFQ

LTC1798CS8-2.5#PBF

Analog Devices Inc.In Stock: 1938LTC1798CS8-2.5#PBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM4140BCM-2.5 is determined by the following critical parameters: fixed 2.5V output voltage, 8-SOIC package compatibility, surface mount mounting type, and functional equivalence as a Series Voltage Reference IC. All substitute parts must maintain the same output voltage and package footprint to ensure direct PCB compatibility without layout modifications.

The LM4140BCM-2.5/NOPB is a direct equivalent with identical electrical specifications and the same 8-SOIC package, differing only in product status (Active vs. Obsolete) and RoHS compliance level. This part is the recommended primary substitute due to complete parameter alignment.

The ADR03BRZ and LTC1798CS8-2.5#PBF are functional alternatives that share the 2.5V fixed output, ±0.1% tolerance class, 8-SOIC package, and surface mount configuration. These parts accommodate variations in input voltage range, supply current, and temperature coefficient within acceptable engineering tolerances for voltage reference applications. Both are Active products with ROHS3 compliance, providing long-term availability assurance.

Parameter Comparison

Engineering Selection Recommendations

For new designs and procurement, the LM4140BCM-2.5/NOPB is the primary substitute. It maintains complete electrical and mechanical compatibility with the obsolete LM4140BCM-2.5 while offering Active product status and ROHS3 compliance, ensuring long-term supply chain stability and regulatory alignment.

The ADR03BRZ is suitable for applications requiring extended input voltage range (4.5V ~ 36V) and wider operating temperature span (-40°C ~ 125°C). Its superior temperature coefficient (3 ppm/°C) provides enhanced stability in temperature-sensitive applications. ROHS3 compliance and Active status support modern procurement requirements.

The LTC1798CS8-2.5#PBF accommodates designs with minimal supply current requirements (8.5 µA) and moderate input voltage range (2.7V ~ 12.6V). While tolerance is relaxed to ±0.15% and temperature coefficient is higher (40 ppm/°C), this part remains suitable for applications where precision is secondary to power efficiency. ROHS3 compliance and Active status ensure regulatory and supply continuity.

All substitute parts share identical 8-SOIC package geometry, enabling direct PCB footprint compatibility without layout revision.

Frequently Asked Questions (FAQ)

Q: Can LM4140BCM-2.5/NOPB replace LM4140BCM-2.5 without PCB modification?

A: Yes. Both parts are identical in electrical specifications and 8-SOIC package footprint. No PCB layout changes are required.

Q: What is the primary difference between LM4140BCM-2.5 and LM4140BCM-2.5/NOPB?

A: The LM4140BCM-2.5/NOPB is the Active production variant with ROHS3 compliance. The original LM4140BCM-2.5 is Obsolete and RoHS non-compliant. Electrical performance is identical.

Q: Can ADR03BRZ be used in place of LM4140BCM-2.5 in all applications?

A: ADR03BRZ is compatible for applications operating within its specified input voltage range (4.5V ~ 36V) and temperature range (-40°C ~ 125°C). The LM4140BCM-2.5 input range is 1.8V ~ 5.5V. Verify your circuit's input voltage before substitution.

Q: What are the key differences between ADR03BRZ and LTC1798CS8-2.5#PBF?

A: ADR03BRZ offers wider input voltage range (4.5V ~ 36V), extended temperature range (-40°C ~ 125°C), superior temperature coefficient (3 ppm/°C), and higher output current (10 mA). LTC1798CS8-2.5#PBF provides lower supply current (8.5 µA) and narrower input range (2.7V ~ 12.6V) with relaxed tolerance (±0.15%).

Q: Are all substitute parts RoHS compliant?

A: LM4140BCM-2.5/NOPB, ADR03BRZ, and LTC1798CS8-2.5#PBF are all ROHS3 compliant. The original LM4140BCM-2.5 is RoHS non-compliant.

Q: Do all parts fit the same PCB footprint?

A: Yes. All parts use 8-SOIC (0.154", 3.90mm Width) package with identical pin configuration and spacing, enabling direct footprint compatibility.

Q: Which substitute offers the best temperature stability?

A: ADR03BRZ has the lowest temperature coefficient at 3 ppm/°C, compared to 6 ppm/°C for LM4140BCM-2.5/NOPB and 40 ppm/°C for LTC1798CS8-2.5#PBF.

Q: Which substitute has the lowest power consumption?

A: LTC1798CS8-2.5#PBF has the lowest supply current at 8.5 µA, making it suitable for battery-powered or low-power applications.