LT1004IDRG4-1-2 Equivalent & Substitute Parts

Part Overview

The LT1004IDRG4-1-2 is a shunt voltage reference IC manufactured by Texas Instruments, designed for precision voltage reference applications requiring fixed 1.235V output with ±0.32% tolerance. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The device operates across the industrial temperature range of -40°C to 85°C and is packaged in 8-SOIC surface mount configuration with Cut Tape (CT) packaging.

Substiute Parts

LT1004IDRG4-1-2

Texas InstrumentsIn Stock: 12676LT1004IDRG4-1-2 Datasheet

Current PartRFQ

LT1004IDR-1-2

Texas InstrumentsIn Stock: 3859LT1004IDR-1-2 Datasheet

Parametric EquivalentRFQ

LT1004IS8-1.2#PBF

Analog Devices Inc.In Stock: 1578LT1004IS8-1.2#PBF Datasheet

DirectRFQ

LT1004IS8-1.2#TRPBF

Analog Devices Inc.In Stock: 2027LT1004IS8-1.2#TRPBF Datasheet

DirectRFQ

LM285D-1.2G

onsemiIn Stock: 1442LM285D-1.2G Datasheet

MFR RecommendedRFQ

LM285D-1.2R2G

onsemiIn Stock: 21148LM285D-1.2R2G Datasheet

MFR RecommendedRFQ

LT1004CS8-1.2#PBF

Analog Devices Inc.In Stock: 1401LT1004CS8-1.2#PBF Datasheet

MFR RecommendedRFQ

LT1004CS8-1.2#TRPBF

Analog Devices Inc.In Stock: 2291LT1004CS8-1.2#TRPBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LT1004IDRG4-1-2 is determined by the following critical parameters: reference type (shunt), output type (fixed), output voltage (1.235V nominal), output current capability (20 mA), tolerance specification (±0.32% or tighter), temperature coefficient (20ppm/°C or lower), operating temperature range (-40°C to 85°C), and package type (8-SOIC surface mount).

Substitute parts are grouped into three categories:

Parametric Equivalent (Same Manufacturer, Different Packaging): LT1004IDR-1-2 maintains identical electrical specifications and differs only in packaging format (Tape & Reel vs. Cut Tape).

Direct Manufacturer Equivalents (Different Manufacturer, Comparable Specifications): LT1004IS8-1.2#PBF and LT1004IS8-1.2#TRPBF are manufactured by Analog Devices Inc. with output voltage of 1.23V (within tolerance band) and ±0.3% tolerance (tighter than original), maintaining 20 mA output current and 20ppm/°C temperature coefficient.

Manufacturer Recommended Alternatives (Relaxed Tolerance): LM285D-1.2G and LM285D-1.2R2G are onsemi products with identical 1.235V output and 20 mA current but with ±1% tolerance (wider than original) and 80ppm/°C temperature coefficient (higher than original). These are suitable where tolerance and temperature coefficient specifications can be relaxed.

Manufacturer Recommended Alternatives (Narrower Temperature Range): LT1004CS8-1.2#PBF and LT1004CS8-1.2#TRPBF are Analog Devices Inc. products with 1.235V output, ±0.3% tolerance, and 20ppm/°C temperature coefficient, but operate only across 0°C to 70°C (narrower than original -40°C to 85°C range).

Parameter Comparison

Engineering Selection Recommendations

First Choice for Direct Replacement: LT1004IDR-1-2 is the optimal substitute, offering identical electrical specifications and full temperature range coverage (-40°C to 85°C). This part is active and maintains all performance characteristics of the obsolete LT1004IDRG4-1-2, with the only difference being packaging format (Tape & Reel instead of Cut Tape).

Second Choice for Equivalent Performance: LT1004IS8-1.2#PBF and LT1004IS8-1.2#TRPBF (Analog Devices Inc.) provide tighter tolerance (±0.3% vs. ±0.32%) and maintain identical temperature coefficient (20ppm/°C) and full operating range. Output voltage is 1.23V, which falls within the tolerance band of the original specification.

Alternative for Relaxed Specifications: LM285D-1.2G and LM285D-1.2R2G (onsemi) are suitable only when design specifications permit wider tolerance (±1%) and higher temperature coefficient (80ppm/°C). These parts maintain the full -40°C to 85°C operating range and identical output current (20 mA).

Not Recommended for Full Replacement: LT1004CS8-1.2#PBF and LT1004CS8-1.2#TRPBF have restricted operating temperature range (0°C to 70°C) and are unsuitable for applications requiring the full industrial temperature range of the original part.

All substitute parts are ROHS3 compliant and carry identical regulatory certifications (REACH Unaffected, EAR99 ECCN classification).

Frequently Asked Questions (FAQ)

Q: Can LT1004IDR-1-2 be used as a direct replacement for LT1004IDRG4-1-2?

A: Yes. LT1004IDR-1-2 is a direct parametric equivalent with identical electrical specifications. The only difference is packaging format (Tape & Reel vs. Cut Tape). Both parts deliver 1.235V output with ±0.32% tolerance, 20ppm/°C temperature coefficient, and operate across -40°C to 85°C.

Q: What is the difference between the Analog Devices LT1004IS8 variants and the original Texas Instruments part?

A: The Analog Devices LT1004IS8-1.2#PBF and LT1004IS8-1.2#TRPBF deliver 1.23V output (within tolerance) with tighter ±0.3% tolerance specification. Temperature coefficient remains 20ppm/°C, and full operating range (-40°C to 85°C) is maintained. These parts are functionally compatible for applications where the tighter tolerance is acceptable.

Q: Why are the onsemi LM285D parts listed as alternatives if they have different specifications?

A: LM285D-1.2G and LM285D-1.2R2G are manufacturer-recommended alternatives for applications where tolerance and temperature coefficient specifications can be relaxed. They maintain identical 1.235V output and 20 mA current capability across the full -40°C to 85°C range, but with ±1% tolerance and 80ppm/°C temperature coefficient.

Q: Can LT1004CS8-1.2#PBF replace the original part in all applications?

A: No. LT1004CS8-1.2#PBF operates only across 0°C to 70°C, which is narrower than the original -40°C to 85°C range. This part is suitable only for applications with restricted temperature requirements. Electrical specifications (1.235V, ±0.3% tolerance, 20ppm/°C) are superior to the original.

Q: What packaging options are available for substitutes?

A: Substitute parts are available in three packaging formats: Cut Tape (CT), Tube, and Tape & Reel (TR). All maintain the same 8-SOIC physical package (0.154", 3.90mm width). Selection depends on production volume and assembly requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited). Regulatory classifications (REACH Unaffected, EAR99 ECCN) are identical across all parts.