OPA2134UA Equivalent & Substitute Parts

Part Overview

The OPA2134UA is a dual-channel audio operational amplifier manufactured by Texas Instruments, housed in an 8-SOIC surface mount package. This audio-grade amplifier features a slew rate of 20V/µs and gain bandwidth product of 8 MHz, designed for audio signal processing applications requiring low noise and high fidelity performance. The device operates across a wide supply voltage range of 5V to 36V and maintains active product status with full RoHS3 compliance. Substitute parts are necessary when addressing packaging format requirements, inventory constraints, or specific performance trade-offs in audio circuit design.

Key Parameters

Parameter	OPA2134UA	Unit
Amplifier Type	Audio	—
Number of Circuits	2	Channels
Slew Rate	20	V/µs
Gain Bandwidth Product	8	MHz
Current - Input Bias	5	pA
Voltage - Input Offset	500	µV
Current - Supply (per channel)	4	mA
Current - Output / Channel	35	mA
Voltage - Supply Span (Min)	5	V
Voltage - Supply Span (Max)	36	V
Operating Temperature	-40 to 85	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
Product Status	Active	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the OPA2134UA are selected based on strict electrical and mechanical compatibility criteria. All substitute candidates maintain the same 8-SOIC package footprint and surface mount configuration, ensuring direct PCB compatibility. Substitution logic is organized around the following key parameters:

Primary Compatibility Criteria:

Package / Case: 8-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount
Number of Circuits: 2 channels
Voltage - Supply Span: Minimum 5V, Maximum 36V overlap required

Secondary Performance Parameters:

Slew Rate: 20V/µs (OPA2134UA baseline)
Gain Bandwidth Product: 8 MHz (OPA2134UA baseline)
Operating Temperature Range: -40°C to 85°C (OPA2134UA baseline)
Current - Input Bias: 5 pA (OPA2134UA baseline)

Substitute parts are grouped into two categories: Direct Performance Equivalents (matching or exceeding key electrical specifications) and Functional Alternatives (meeting package and basic operational requirements with performance trade-offs).

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA)	Input Offset (µV)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Product Status
OPA2134UA	Texas Instruments	Audio	20	8	5	500	5	36	-40 to 85	Active
OPA2132UA	Texas Instruments	J-FET	20	8	5	500	5	36	-40 to 85	Active
OPA2132UA/2K5	Texas Instruments	J-FET	20	8	5	500	5	36	-40 to 85	Active
OPA2131UJ	Texas Instruments	J-FET	10	4	50	1500	9	36	-40 to 85	Active
OPA2107AU	Texas Instruments	General Purpose	18	4.5	4	100	9	36	-25 to 85	Not For New Designs
LF353DR	Texas Instruments	J-FET	13	3	50	5000	7	36	0 to 70	Active
LF412CDR	Texas Instruments	J-FET	13	3	50	500	7	36	0 to 70	Active
LF412CD	Texas Instruments	J-FET	13	3	50	500	7	36	0 to 70	Obsolete
TL072ACDR	Texas Instruments	J-FET	13	5.25	65	3000	10	30	0 to 70	Active
TL072BCDR	Texas Instruments	J-FET	13	5.25	65	2000	10	30	0 to 70	Active
TL072BCD	Texas Instruments	J-FET	13	5.25	65	2000	10	30	0 to 70	Obsolete

Engineering Selection Recommendations

Direct Electrical Equivalents (Recommended for OPA2134UA Replacement):

The OPA2132UA and OPA2132UA/2K5 are direct electrical equivalents to the OPA2134UA. Both devices match all critical performance parameters: 20V/µs slew rate, 8 MHz gain bandwidth product, 5 pA input bias current, and 500 µV input offset voltage. Both operate across the identical 5V to 36V supply range and maintain the -40°C to 85°C temperature specification. The primary distinction is packaging format: OPA2132UA is supplied in Tube packaging, while OPA2132UA/2K5 is supplied in Cut Tape (CT) & Digi-Reel® format. Both maintain Active product status and full RoHS3 compliance. Selection between these two depends solely on procurement and assembly requirements.

Performance Trade-off Alternatives (Active Status):

The OPA2131UJ provides Active product status with extended temperature range matching (-40°C to 85°C) but exhibits reduced performance specifications: 10V/µs slew rate (versus 20V/µs), 4 MHz gain bandwidth product (versus 8 MHz), and 50 pA input bias current (versus 5 pA). This device requires minimum 9V supply voltage. The OPA2131UJ is suitable for applications where lower slew rate and bandwidth are acceptable and where reduced power consumption (1.5 mA per channel versus 4 mA) is beneficial.

Functional Alternatives (Active Status, Performance Reduction):

The LF353DR, LF412CDR, TL072ACDR, and TL072BCDR are J-FET amplifiers with Active product status but reduced performance specifications and narrower operating ranges. All exhibit slew rates between 13V/µs and 5.25V/µs (below the 20V/µs baseline) and gain bandwidth products between 3 MHz and 5.25 MHz (below the 8 MHz baseline). These devices operate within 0°C to 70°C temperature range (narrower than -40°C to 85°C) and require minimum supply voltages of 7V to 10V. The LF412CDR and TL072BCDR offer the closest input offset voltage specifications (500 µV and 2000 µV respectively) among this group.

Obsolete Parts (Not Recommended for New Designs):

The LF412CD and TL072BCD are classified as Obsolete and OPA2107AU is classified as Not For New Designs. These parts should not be selected for new circuit designs despite Active or Obsolete inventory availability.

Compliance and Certification:

All recommended substitute parts maintain ROHS3 compliance and REACH Unaffected status, matching the OPA2134UA certification profile. Moisture Sensitivity Level (MSL) varies: OPA2134UA and OPA2132 variants specify MSL 3 (168 Hours), while J-FET alternatives specify MSL 1 (Unlimited), indicating superior moisture tolerance for the J-FET options.

Frequently Asked Questions (FAQ)

Q: Can OPA2132UA directly replace OPA2134UA in existing designs?

A: Yes. The OPA2132UA and OPA2132UA/2K5 are direct electrical equivalents with identical electrical specifications, supply voltage range, temperature range, and 8-SOIC package footprint. The only difference is packaging format (Tube versus Cut Tape/Digi-Reel). No circuit modifications are required.

Q: What is the difference between OPA2132UA and OPA2132UA/2K5?

A: Both devices are electrically identical. OPA2132UA is supplied in Tube packaging, while OPA2132UA/2K5 is supplied in Cut Tape (CT) & Digi-Reel® format. Selection depends on assembly line requirements and procurement preferences.

Q: Why would I choose OPA2131UJ over OPA2132UA?

A: The OPA2131UJ offers lower power consumption (1.5 mA per channel versus 4 mA) and maintains the same -40°C to 85°C temperature range. However, it sacrifices slew rate (10V/µs versus 20V/µs) and gain bandwidth product (4 MHz versus 8 MHz). Selection depends on whether the application can tolerate reduced bandwidth and slew rate in exchange for lower power dissipation.

Q: Are the LF353DR, LF412CDR, TL072ACDR, and TL072BCDR suitable replacements?

A: These J-FET amplifiers are functionally compatible in the 8-SOIC package but exhibit reduced performance specifications. Slew rates range from 13V/µs to 5.25V/µs (below 20V/µs), and gain bandwidth products range from 3 MHz to 5.25 MHz (below 8 MHz). Operating temperature range is limited to 0°C to 70°C. These alternatives are suitable only for applications where lower bandwidth and slew rate are acceptable.

Q: What is the significance of the 8-SOIC package specification?

A: The 8-SOIC (0.154", 3.90mm Width) package is a standard surface mount configuration. All listed substitute parts use this identical package, ensuring direct PCB footprint compatibility without layout modifications. This is a mandatory compatibility criterion for all substitutes.

Q: Why is OPA2107AU listed as "Not For New Designs"?

A: The OPA2107AU carries a "Not For New Designs" product status designation, indicating that Texas Instruments does not recommend this part for new circuit development. While it remains available in limited inventory, new designs should select from Active status alternatives such as OPA2132UA or OPA2131UJ.

Q: What does MSL (Moisture Sensitivity Level) mean for component selection?

A: MSL indicates the component's sensitivity to moisture during storage and handling. OPA2134UA and OPA2132 variants specify MSL 3 (168 Hours), meaning they require controlled humidity storage and have a limited shelf life after packaging opening. J-FET alternatives specify MSL 1 (Unlimited), indicating superior moisture tolerance and no shelf-life restrictions. For applications with extended storage or humid environments, MSL 1 components offer handling advantages.

Q: Can I use TL072 series amplifiers as direct replacements?

A: No. TL072ACDR and TL072BCDR are not direct replacements. They exhibit lower slew rate (13V/µs versus 20V/µs), lower gain bandwidth product (5.25 MHz versus 8 MHz), higher input bias current (65 pA versus 5 pA), and narrower operating temperature range (0°C to 70°C versus -40°C to 85°C). Additionally, they require minimum 10V supply voltage versus 5V for OPA2134UA. These devices are suitable only for applications where reduced performance specifications are acceptable.

Q: What supply voltage range must I verify when substituting?

A: The OPA2134UA operates from 5V to 36V. When selecting substitutes, verify that your circuit's supply voltage falls within the substitute part's specified range. For example, LF353DR requires minimum 7V (not compatible with 5V supplies), while TL072 series requires minimum 10V. OPA2132UA and OPA2131UJ both support the full 5V to 36V range.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH Unaffected status, matching the OPA2134UA environmental certification profile. This ensures compatibility with RoHS3-regulated applications and procurement requirements.

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