OPA2347UA/2K5G4 Equivalent & Substitute Parts

Part Overview

The OPA2347UA/2K5G4 is a general purpose operational amplifier manufactured by Texas Instruments, featuring dual circuits in an 8-SOIC surface mount package. This device is part of the microPOWER™ series and delivers rail-to-rail output capability with low supply current consumption. The part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain compatibility with existing circuit designs while offering active product status and improved availability.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	2	—
Output Type	Rail-to-Rail	—
Slew Rate	0.17	V/µs
Gain Bandwidth Product	350	kHz
Current - Input Bias	0.5	pA
Voltage - Input Offset	2	mV
Current - Supply (x2 Channels)	20	µA
Current - Output / Channel	17	mA
Voltage - Supply Span (Min)	2.3	V
Voltage - Supply Span (Max)	5.5	V
Operating Temperature	-55 to 125	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	2 (1 Year)	—

Substitute Part Grouping Explanation

Substitution of the OPA2347UA/2K5G4 is determined by the following critical parameters:

Primary Substitution Criteria:

Dual-circuit configuration (2 circuits per package)
Rail-to-rail output capability
8-SOIC surface mount package (0.154", 3.90mm width)
General purpose amplifier classification
Supply voltage range compatibility (minimum 2.3 V, maximum 5.5 V)
Operating temperature range (-55°C to 125°C preferred, -40°C to 125°C acceptable)

Substitution Categories:

Category 1: Direct Pin-Compatible Replacements (Identical Electrical Performance) Parts OPA2347UA/2K5 and AD8542ARZ variants maintain identical electrical specifications and package dimensions, enabling direct substitution without circuit modification.

Category 2: Functional Equivalents (Enhanced Performance) Parts LMV358IDT and LMV358IYDT provide superior performance characteristics including higher slew rate (0.45 V/µs vs. 0.17 V/µs), higher gain bandwidth product (1.3 MHz vs. 350 kHz), and lower input offset voltage (100 µV vs. 2 mV), while maintaining package compatibility and supply voltage range.

Category 3: Alternative Performance Profiles (Specialized Applications) Parts BU7266F-E2, BU7266SF-E2, BU7486F-E2, and LMR932F-GE2 offer different performance trade-offs suitable for specific application requirements, with variations in slew rate, bandwidth, and supply current characteristics.

Parameter Comparison

Part Number	Manufacturer	Slew Rate (V/µs)	GBW (kHz)	Input Bias (pA)	Input Offset (mV)	Supply Current (µA)	Output Current (mA)	Temp Range (°C)	Package	Status
OPA2347UA/2K5G4	Texas Instruments	0.17	350	0.5	2	20	17	-55 to 125	8-SOIC	Discontinued
OPA2347UA/2K5	Texas Instruments	0.17	350	0.5	2	20	17	-55 to 125	8-SOIC	Active
AD8542ARZ	Analog Devices Inc.	0.92	1000	4	1	45	30	-40 to 125	8-SOIC	Active
AD8542ARZ-REEL	Analog Devices Inc.	0.92	1000	4	1	45	30	-40 to 125	8-SOIC	Active
AD8542ARZ-REEL7	Analog Devices Inc.	0.92	1000	4	1	45	30	-40 to 125	8-SOIC	Active
BU7266F-E2	Rohm Semiconductor	0.0024	4	1	1	0.7	4	-40 to 85	8-SOP	Active
BU7266SF-E2	Rohm Semiconductor	0.0024	4	1	1	0.7	4	-40 to 105	8-SOP	Active
BU7486F-E2	Rohm Semiconductor	10	10000	1	1	6	12	-40 to 105	8-SOP	Active
LMR932F-GE2	Rohm Semiconductor	0.35	1400	5	1	140	90	-40 to 85	8-SOP	Active
LMV358IDT	STMicroelectronics	0.45	1300	16	0.1	162	160	-40 to 125	8-SOIC	Active
LMV358IYDT	STMicroelectronics	0.45	1300	16	0.1	162	160	-40 to 125	8-SOIC	Active

Engineering Selection Recommendations

Tier 1: Direct Replacement (Recommended for Pin-Compatible Substitution)

OPA2347UA/2K5 is the primary recommended substitute. This part maintains identical electrical specifications and package configuration to the discontinued OPA2347UA/2K5G4, with the distinction of active product status and improved availability (17,200 units in stock). Both parts are ROHS3 compliant and REACH unaffected. The packaging difference (Cut Tape & Digi-Reel® versus original packaging) does not affect electrical performance or circuit compatibility.

Tier 2: Enhanced Performance Alternatives (Recommended for New Designs)

AD8542ARZ, AD8542ARZ-REEL, and AD8542ARZ-REEL7 from Analog Devices Inc. provide superior electrical performance with higher slew rate (0.92 V/µs), increased gain bandwidth product (1 MHz), and improved output current capability (30 mA per channel). These parts maintain 8-SOIC package compatibility and operate across the required supply voltage range. Operating temperature range is -40°C to 125°C (versus -55°C to 125°C for the original part). All variants are ROHS3 compliant with MSL 1 rating (unlimited shelf life). Inventory availability is substantial (33,700 to 37,241 units).

Tier 3: Specialized Performance Profiles

LMV358IDT and LMV358IYDT from STMicroelectronics offer the highest performance metrics within the 8-SOIC package family, with slew rate of 0.45 V/µs and gain bandwidth product of 1.3 MHz. LMV358IYDT includes automotive qualification (AEC-Q100) for applications requiring automotive-grade components. Both maintain -40°C to 125°C operating temperature range and ROHS3 compliance.

BU7486F-E2 from Rohm Semiconductor is suitable for high-speed applications requiring 10 V/µs slew rate and 10 MHz bandwidth, though with higher supply current (6 mA) and restricted temperature range (-40°C to 105°C).

BU7266F-E2 and BU7266SF-E2 are appropriate for ultra-low-power applications with 700 nA supply current, though with significantly reduced bandwidth (4 kHz) and slew rate (0.0024 V/µs).

LMR932F-GE2 provides intermediate performance with 0.35 V/µs slew rate and 1.4 MHz bandwidth, suitable for general purpose applications with moderate performance requirements.

Frequently Asked Questions (FAQ)

Q1: Can OPA2347UA/2K5 be used as a direct replacement for OPA2347UA/2K5G4?

Yes. OPA2347UA/2K5 is electrically and mechanically identical to the discontinued OPA2347UA/2K5G4. The only difference is packaging format (Cut Tape & Digi-Reel® versus original packaging) and product status (Active versus Discontinued). No circuit modifications are required.

Q2: What are the key differences between OPA2347UA/2K5 and AD8542ARZ?

Both parts are dual-circuit, rail-to-rail operational amplifiers in 8-SOIC packages. AD8542ARZ offers superior performance: slew rate of 0.92 V/µs (versus 0.17 V/µs), gain bandwidth product of 1 MHz (versus 350 kHz), and output current of 30 mA per channel (versus 17 mA). AD8542ARZ has higher supply current (45 µA versus 20 µA) and operates at -40°C to 125°C (versus -55°C to 125°C). Both are ROHS3 compliant.

Q3: Are the 8-SOIC and 8-SOP packages interchangeable?

No. While both are 8-pin surface mount packages, 8-SOIC (0.154", 3.90mm width) and 8-SOP (0.173", 4.40mm width) have different physical dimensions and pin spacing. PCB layouts designed for 8-SOIC cannot accommodate 8-SOP packages without redesign. Parts BU7266F-E2, BU7266SF-E2, BU7486F-E2, and LMR932F-GE2 use 8-SOP packaging and require PCB modification.

Q4: Which substitute part is recommended for automotive applications?

LMV358IYDT is qualified to AEC-Q100 automotive standards and is suitable for automotive-grade applications. This part maintains the same electrical performance as LMV358IDT (0.45 V/µs slew rate, 1.3 MHz bandwidth) while meeting automotive qualification requirements.

Q5: What is the impact of supply current differences on circuit design?

Supply current affects power consumption and thermal management. OPA2347UA/2K5 draws 20 µA per dual-channel package. AD8542ARZ draws 45 µA (2.25× higher), while BU7266F-E2 draws only 700 nA (0.035× lower). For battery-powered or power-constrained applications, lower supply current is advantageous. For high-performance applications, the increased supply current of AD8542ARZ is acceptable given superior performance metrics.

Q6: Can LMV358IDT replace OPA2347UA/2K5G4 in existing designs?

LMV358IDT is functionally compatible as a dual-circuit, rail-to-rail operational amplifier in 8-SOIC packaging. However, electrical performance differs: LMV358IDT has higher slew rate (0.45 V/µs versus 0.17 V/µs), higher bandwidth (1.3 MHz versus 350 kHz), and higher supply current (162 µA versus 20 µA). These differences may affect circuit behavior in designs optimized for the original part's specifications. Verification is necessary for applications sensitive to bandwidth or slew rate characteristics.

Q7: What does MSL (Moisture Sensitivity Level) rating mean for component handling?

MSL indicates moisture sensitivity during storage and handling. OPA2347UA/2K5G4 has MSL 2 (1 Year), meaning the component must be used within one year of opening the moisture barrier bag. AD8542ARZ and most alternatives have MSL 1 (Unlimited), requiring no time-based usage restrictions. MSL 1 components offer greater flexibility in inventory management and longer shelf life after opening.

Q8: Are all substitute parts ROHS3 compliant?

Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements equivalent to the original OPA2347UA/2K5G4.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message