EL8171IS-T13 Equivalent & Substitute Parts

Part Overview

The EL8171IS-T13 is an instrumentation amplifier manufactured by Renesas Electronics Corporation, housed in an 8-SOIC surface mount package. This device features rail-to-rail output capability with a single circuit configuration, designed for precision signal conditioning applications requiring low input offset voltage and minimal input bias current.

The EL8171IS-T13 is classified as obsolete. Identifying suitable substitute components is necessary to maintain design continuity, ensure supply chain availability, and support long-term product support for applications currently utilizing this device.

Key Parameters

Parameter	Value	Unit
Amplifier Type	Instrumentation	—
Number of Circuits	1	—
Output Type	Rail-to-Rail	—
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Slew Rate	0.55	V/µs
-3dB Bandwidth	450	kHz
Current - Input Bias	10	pA
Voltage - Input Offset	470	µV
Current - Supply	65	µA
Current - Output / Channel	32	mA
Voltage - Supply Span (Min)	2.4	V
Voltage - Supply Span (Max)	5.5	V
Operating Temperature	-40°C ~ 125°C	—
Mounting Type	Surface Mount	—
RoHS Status	RoHS non-compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the EL8171IS-T13 is determined by the following critical parameters:

Package Compatibility: All substitute parts must use the 8-SOIC (0.154", 3.90mm Width) surface mount package to ensure direct PCB footprint compatibility.

Electrical Performance Envelope: Substitute parts must operate within the supply voltage range of 2.4 V to 5.5 V minimum and accommodate the rail-to-rail output requirement. Input bias current, input offset voltage, slew rate, and output current capability must be evaluated against application-specific requirements.

Functional Classification: The EL8171IS-T13 is an instrumentation amplifier. Substitute parts in this analysis include general-purpose amplifiers that meet the package and electrical envelope requirements, as these devices can fulfill instrumentation amplifier applications when configured appropriately.

Product Status and Compliance: Active product status and RoHS3 compliance are preferred for new designs and long-term availability, though obsolete alternatives may be considered for legacy system support.

Parameter Comparison

Parameter	EL8171IS-T13	OPA379AID	OPA379AIDR	MAX4323ESA+	TLV2450CD	TLV2460CD	TLV2471AQDRG4Q1
Manufacturer	Renesas	Texas Instruments	Texas Instruments	Analog Devices/Maxim	Texas Instruments	Texas Instruments	Texas Instruments
Amplifier Type	Instrumentation	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Slew Rate (V/µs)	0.55	0.03	0.03	2	0.11	1.6	1.5
Current - Input Bias (pA)	10	5	5	50	500	1.3	2.5
Voltage - Input Offset (µV)	470	400	400	700	300	500	250
Current - Supply (µA)	65	2.9	2.9	725	23	550	600
Current - Output / Channel (mA)	32	5	5	—	10	80	35
Voltage - Supply Span (Min)	2.4 V	1.8 V	1.8 V	2.4 V	2.7 V	2.7 V	2.7 V
Voltage - Supply Span (Max)	5.5 V	5.5 V	5.5 V	6.5 V	6 V	6 V	6 V
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 125°C
Product Status	Obsolete	Active	Active	Active	Obsolete	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	2 (1 Year)	2 (1 Year)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitutes for Active Product Status:

OPA379AID and OPA379AIDR are active Texas Instruments general-purpose amplifiers that provide the lowest supply current (2.9 µA) and lowest input bias current (5 pA) among available substitutes. Both devices maintain the full -40°C to 125°C operating temperature range of the original EL8171IS-T13 and are RoHS3 compliant. The OPA379AIDR variant is supplied in Tape & Reel packaging, while OPA379AID is supplied in Tube packaging. These devices are suitable for applications prioritizing ultra-low power consumption and minimal input bias effects.

TLV2460CD is an active Texas Instruments general-purpose amplifier offering significantly higher slew rate (1.6 V/µs) and output current capability (80 mA) compared to the EL8171IS-T13. This device is RoHS3 compliant and features MSL 1 rating. However, the operating temperature range is limited to 0°C to 70°C, which restricts applicability to designs not requiring the full -40°C to 125°C range.

TLV2471AQDRG4Q1 is an active Texas Instruments general-purpose amplifier qualified to AEC-Q100 automotive standards. This device maintains the full -40°C to 125°C operating temperature range, provides moderate slew rate (1.5 V/µs) and output current (35 mA), and is RoHS3 compliant. The automotive qualification and AEC-Q100 certification make this device suitable for applications requiring automotive-grade reliability.

MAX4323ESA+ is an active Analog Devices/Maxim Integrated general-purpose amplifier with the highest slew rate (2 V/µs) among substitutes and extended maximum supply voltage (6.5 V). However, the operating temperature range is limited to -40°C to 85°C, and supply current is significantly higher (725 µA). This device is RoHS3 compliant and MSL 1 rated.

Secondary Substitutes for Legacy System Support:

TLV2450CD is an obsolete Texas Instruments general-purpose amplifier. While active product status is preferred, this device may be considered for legacy system maintenance where existing inventory is available. The device is RoHS3 compliant and operates within the 2.7 V to 6 V supply range. Operating temperature range is limited to 0°C to 70°C.

Frequently Asked Questions (FAQ)

Q: Can the OPA379AID directly replace the EL8171IS-T13 in existing designs?

A: The OPA379AID shares the 8-SOIC package footprint and rail-to-rail output configuration with the EL8171IS-T13. Both devices operate within overlapping supply voltage ranges (1.8 V to 5.5 V for OPA379AID versus 2.4 V to 5.5 V for EL8171IS-T13). However, the OPA379AID exhibits significantly lower slew rate (0.03 V/µs versus 0.55 V/µs) and reduced output current capability (5 mA versus 32 mA). Direct substitution is valid only when application requirements do not demand the higher slew rate or output current of the original device.

Q: What is the primary difference between OPA379AID and OPA379AIDR?

A: Both devices are electrically identical Texas Instruments OPA379 general-purpose amplifiers with identical electrical specifications. The difference is packaging format: OPA379AID is supplied in Tube packaging, while OPA379AIDR is supplied in Tape & Reel (TR) packaging. Selection between these variants depends on assembly process requirements and volume considerations.

Q: Why does the TLV2460CD have higher supply current than the EL8171IS-T13?

A: The TLV2460CD is designed for higher performance characteristics, including significantly higher slew rate (1.6 V/µs versus 0.55 V/µs) and substantially higher output current capability (80 mA versus 32 mA). These enhanced performance characteristics require higher quiescent supply current (550 µA versus 65 µA). Applications requiring higher speed or output current must accept the corresponding increase in power consumption.

Q: Is the TLV2471AQDRG4Q1 suitable for automotive applications?

A: Yes. The TLV2471AQDRG4Q1 carries AEC-Q100 automotive qualification and is specifically designed for automotive-grade applications. This device maintains the full -40°C to 125°C operating temperature range and is RoHS3 compliant. Automotive qualification indicates compliance with automotive reliability and environmental stress testing standards.

Q: What is the significance of Moisture Sensitivity Level (MSL) ratings?

A: MSL ratings indicate the maximum time a component can be stored in ambient conditions before requiring baking prior to reflow soldering. MSL 1 (Unlimited) indicates no time restriction and no baking requirement. MSL 2 (1 Year) indicates the component must be baked if storage exceeds one year. The EL8171IS-T13 has MSL 1 rating. OPA379AID and OPA379AIDR have MSL 2 ratings, requiring baking procedures for components stored beyond one year.

Q: Can substitutes with lower operating temperature ranges be used in designs requiring -40°C to 125°C operation?

A: No. Devices with restricted operating temperature ranges (such as TLV2450CD and TLV2460CD, limited to 0°C to 70°C, or MAX4323ESA+, limited to -40°C to 85°C) cannot be substituted in applications requiring the full -40°C to 125°C operating range of the EL8171IS-T13. Operating outside specified temperature ranges voids device reliability guarantees and may result in functional failure.

Q: What is the relationship between slew rate and application suitability?

A: Slew rate defines the maximum rate of change of output voltage per unit time. The EL8171IS-T13 has a slew rate of 0.55 V/µs. Substitutes with lower slew rates (OPA379AID and OPA379AIDR at 0.03 V/µs) are suitable only for applications with slower signal transitions. Substitutes with higher slew rates (TLV2460CD at 1.6 V/µs, MAX4323ESA+ at 2 V/µs) provide faster response capability but are not required for applications with slower signal requirements.

Q: How does input bias current affect circuit design?

A: Input bias current represents the DC current flowing into the amplifier input terminals. The EL8171IS-T13 has 10 pA input bias current. Lower input bias current (OPA379AID and OPA379AIDR at 5 pA, TLV2471AQDRG4Q1 at 2.5 pA) reduces errors in high-impedance signal conditioning circuits. Higher input bias current (MAX4323ESA+ at 50 nA, TLV2450CD at 500 pA) may introduce measurable offset errors in high-impedance applications but is acceptable for standard impedance levels.

Q: What does RoHS3 compliance indicate?

A: RoHS3 compliance indicates the device meets Restriction of Hazardous Substances Directive requirements, restricting the use of lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls, and polybrominated diphenyl ethers. The EL8171IS-T13 is RoHS non-compliant. All listed substitute parts are RoHS3 compliant, making them suitable for applications and regions requiring RoHS compliance.

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