OA2NP34S Equivalent & Substitute Parts

Part Overview

The OA2NP34S is a CMOS amplifier integrated circuit manufactured by STMicroelectronics, configured as a dual-channel (2 circuit) rail-to-rail operational amplifier in an 8-MiniSO surface mount package. This device is classified as a linear amplifier and maintains Active product status with full RoHS3 compliance and REACH unaffected designation.

The OA2NP34S is designed for low-power, low-speed analog signal conditioning applications requiring minimal supply current and input bias. Substitute parts are identified to address scenarios involving component availability, packaging format requirements, or performance parameter adjustments while maintaining functional compatibility within the 8-MSOP/8-MiniSO package family and rail-to-rail output architecture.

Key Parameters

Parameter	Value	Unit
Amplifier Type	CMOS	—
Number of Circuits	2	—
Output Type	Rail-to-Rail	—
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	—
Slew Rate	0.003	V/µs
Gain Bandwidth Product	9	kHz
Current - Input Bias	1	pA
Voltage - Input Offset	100	µV
Current - Supply	650	nA (x2 Channels)
Current - Output / Channel	11	mA
Voltage - Supply Span (Min)	1.5	V
Voltage - Supply Span (Max)	5.5	V
Operating Temperature	-40 to 85	°C
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the OA2NP34S are grouped based on the following substitution criteria:

Primary Compatibility Parameters:

Dual-channel (2 circuit) configuration
Rail-to-rail output architecture
8-MSOP or 8-MiniSO surface mount package
Operating temperature range overlap with -40°C minimum
RoHS3 compliance and REACH unaffected status
Supply voltage span compatibility (minimum 1.5 V to 5.5 V overlap)

Substitution Categories:

Category 1: CMOS Amplifiers with Enhanced Performance Parts AD8602ARMZ, AD8602ARMZ-REEL, AD8602DRMZ-REEL, AD8606ARMZ-R7, AD8606ARMZ-REEL, AD8616ARMZ, and AD8616ARMZ-REEL maintain CMOS amplifier topology with improved slew rate, gain bandwidth product, and output current capabilities. These parts support the full 2.7 V to 5.5 V supply range and extended operating temperature to 125°C.

Category 2: General Purpose Amplifiers Parts AD8542ARMZ and AD8542ARMZ-REEL are general purpose amplifiers with dual-channel configuration, rail-to-rail output, and 8-MSOP packaging. These parts operate across 2.7 V to 5.5 V supply range and -40°C to 125°C temperature span.

All substitute parts maintain surface mount technology, identical package dimensions (0.118", 3.00mm width), and regulatory compliance equivalent to the OA2NP34S.

Parameter Comparison

Parameter	OA2NP34S	AD8542ARMZ	AD8602ARMZ	AD8606ARMZ-R7	AD8616ARMZ	AD8646ARMZ
Manufacturer	STMicroelectronics	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Amplifier Type	CMOS	General Purpose	CMOS	CMOS	CMOS	General Purpose
Number of Circuits	2	2	2	2	2	2
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Package / Case	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP
Slew Rate (V/µs)	0.003	0.92	6	5	12	11
Gain Bandwidth Product	9 kHz	1 MHz	8.4 MHz	10 MHz	24 MHz	24 MHz
Current - Input Bias (pA)	1	4	0.2	1	0.2	0.3
Voltage - Input Offset (µV)	100	1000	80	80	23	600
Current - Supply (mA, x2 Channels)	0.65	0.045	0.75	1	1.7	1.5
Current - Output / Channel (mA)	11	30	50	80	150	120
Voltage - Supply Span (Min)	1.5 V	2.7 V	2.7 V	2.7 V	2.7 V	2.7 V
Voltage - Supply Span (Max)	5.5 V	5.5 V	5.5 V	5.5 V	5 V	5.5 V
Operating Temperature (°C)	-40 to 85	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Packaging Format Considerations:

The OA2NP34S is supplied in Tape & Reel (TR) format. Substitute parts are available in multiple packaging configurations:

Tape & Reel (TR): AD8606ARMZ-REEL provides direct packaging equivalence
Cut Tape (CT) & Digi-Reel®: AD8542ARMZ-REEL, AD8602ARMZ-REEL, AD8602DRMZ-REEL, AD8606ARMZ-R7, AD8616ARMZ-REEL offer alternative reel formats
Tube: AD8542ARMZ, AD8602ARMZ, AD8616ARMZ, AD8646ARMZ provide tube packaging

Supply Voltage Compatibility:

The OA2NP34S operates from 1.5 V minimum supply. All substitute parts operate from 2.7 V minimum, establishing a 1.2 V offset in the lower supply range. Applications requiring operation below 2.7 V cannot use substitute parts without circuit redesign.

The OA2NP34S maximum supply is 5.5 V. AD8616ARMZ and AD8616ARMZ-REEL specify 5 V maximum, creating a 0.5 V constraint in high-voltage applications.

Temperature Range:

The OA2NP34S operates to 85°C maximum. All substitute parts extend to 125°C, providing enhanced thermal margin for applications requiring extended temperature operation.

Performance Scaling:

Substitute parts are organized by performance tier:

Low-Performance Tier (AD8542ARMZ series): 0.92 V/µs slew rate, 1 MHz gain bandwidth product. Suitable for low-frequency signal conditioning where OA2NP34S performance is marginal.
Mid-Performance Tier (AD8602ARMZ series, AD8606ARMZ series): 5–6 V/µs slew rate, 8.4–10 MHz gain bandwidth product. Appropriate for general-purpose analog signal processing.
High-Performance Tier (AD8616ARMZ series, AD8646ARMZ): 11–12 V/µs slew rate, 24 MHz gain bandwidth product. Suitable for high-speed signal conditioning and precision measurement applications.

Regulatory and Compliance Status:

All substitute parts maintain RoHS3 compliance and REACH unaffected designation, equivalent to the OA2NP34S. Moisture sensitivity level remains MSL 1 (Unlimited) across all alternatives, eliminating moisture-related handling constraints.

Frequently Asked Questions (FAQ)

Q: Can AD8542ARMZ directly replace OA2NP34S in existing PCB layouts?

A: Yes. Both parts use identical 8-MSOP package dimensions (0.118", 3.00mm width) and surface mount technology. Pin-to-pin compatibility is maintained. However, the AD8542ARMZ requires minimum 2.7 V supply versus OA2NP34S minimum 1.5 V. Verify circuit supply voltage before substitution.

Q: What is the primary performance difference between OA2NP34S and AD8616ARMZ?

A: The AD8616ARMZ provides significantly higher slew rate (12 V/µs versus 0.003 V/µs), gain bandwidth product (24 MHz versus 9 kHz), and output current capability (150 mA versus 11 mA per channel). The OA2NP34S is optimized for ultra-low-power applications; AD8616ARMZ is optimized for high-speed signal conditioning. Application requirements determine appropriate selection.

Q: Are there packaging format restrictions when selecting substitutes?

A: No. All substitute parts are available in surface mount 8-MSOP configuration. Packaging format (Tape & Reel, Cut Tape & Digi-Reel, or Tube) is a procurement consideration, not a functional constraint. Select based on inventory management and assembly process requirements.

Q: Does the OA2NP34S CMOS topology require CMOS-type substitutes?

A: No. General purpose amplifiers (AD8542ARMZ, AD8646ARMZ) are functionally compatible substitutes. Amplifier topology classification does not restrict substitution; dual-channel, rail-to-rail output, 8-MSOP package, and supply voltage compatibility are the determining factors.

Q: What supply voltage range is common to OA2NP34S and all substitute parts?

A: The overlapping supply range is 2.7 V to 5.5 V. The OA2NP34S extends lower to 1.5 V; AD8616ARMZ and AD8616ARMZ-REEL extend only to 5 V maximum. For applications operating below 2.7 V or above 5 V, substitute selection is constrained.

Q: Is input bias current a critical parameter for substitution?

A: Input bias current becomes critical in high-impedance signal conditioning circuits. The OA2NP34S specifies 1 pA input bias. AD8602 series and AD8616 series offer 0.2 pA, providing lower bias current. AD8542ARMZ specifies 4 pA, representing higher bias current. Select based on input impedance and signal source characteristics.

Q: Can substitute parts operate at the OA2NP34S maximum temperature of 85°C?

A: Yes. All substitute parts are rated to 125°C minimum, exceeding the OA2NP34S 85°C maximum. No thermal derating is required for substitutes at OA2NP34S operating temperatures.

Q: What is the significance of the DigiTrim® series designation on AD8602 and AD8606 parts?

A: DigiTrim® is an Analog Devices product series designation. It does not affect functional compatibility or substitution criteria. Parts with and without this designation maintain identical electrical specifications and package compatibility.

Q: Are there output current limitations when substituting?

A: Yes. The OA2NP34S provides 11 mA per channel output current. Applications requiring higher output current (e.g., driving low-impedance loads) benefit from substitutes: AD8542ARMZ (30 mA), AD8602 series (50 mA), AD8606 series (80 mA), AD8616 series (150 mA), or AD8646ARMZ (120 mA). Verify load impedance and required output current before selection.

Q: Is the 0.5 V supply voltage difference between OA2NP34S (5.5 V max) and AD8616 series (5 V max) significant?

A: This difference is significant only in applications operating at or near 5.5 V supply. For circuits operating at 5 V or below, AD8616 series substitutes are fully compatible. For circuits requiring 5.5 V operation, AD8542ARMZ, AD8602 series, AD8606 series, or AD8646ARMZ are appropriate alternatives.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message