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AD8541ARTZ-R2 Equivalent & Substitute Parts
Part Overview
The AD8541ARTZ-R2 is a general-purpose operational amplifier manufactured by Analog Devices Inc., packaged in SOT-23-5 surface mount configuration. This device features rail-to-rail output capability with a 1 MHz gain bandwidth product, designed for low-power applications requiring single-circuit amplification. The part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain compatibility with existing designs while meeting current supply chain requirements.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | General Purpose | — |
| Number of Circuits | 1 | — |
| Output Type | Rail-to-Rail | — |
| Slew Rate | 0.92 | V/µs |
| Gain Bandwidth Product | 1 | MHz |
| Current - Input Bias | 4 | pA |
| Voltage - Input Offset | 1 | mV |
| Current - Supply | 45 | µA |
| Current - Output / Channel | 30 | mA |
| Voltage - Supply Span (Min) | 2.7 | V |
| Voltage - Supply Span (Max) | 5.5 | V |
| Operating Temperature | -40 to 125 | °C |
| Mounting Type | Surface Mount | — |
| Package / Case | SC-74A, SOT-753 | — |
| Supplier Device Package | SOT-23-5 | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution of the AD8541ARTZ-R2 is determined by the following critical parameters:
Primary Compatibility Criteria:
- Amplifier Type: General Purpose
- Number of Circuits: 1
- Output Type: Rail-to-Rail
- Gain Bandwidth Product: 1 MHz (±10% tolerance acceptable)
- Voltage Supply Range: Minimum 2.7 V, Maximum 5.5 V
- Package Type: SOT-23-5 (SC-74A, SOT-753)
- Mounting Type: Surface Mount
Secondary Compatibility Criteria:
- Operating Temperature Range: Minimum -40°C (extended range preferred)
- Current Supply: ≤130 µA (low-power operation)
- Input Bias Current: ≤250 nA (low input current preferred)
- Voltage Input Offset: ≤1.7 mV
Substitute parts are grouped based on exact package compatibility (SOT-23-5) and functional equivalence across the specified electrical parameters. Parts meeting all primary criteria are considered direct substitutes. Parts with minor deviations in secondary parameters remain functionally compatible for most general-purpose amplification applications.
Parameter Comparison
| Part Number | Manufacturer | Amplifier Type | Slew Rate (V/µs) | GBW (MHz) | Input Bias (pA) | Input Offset (mV) | Supply Current (µA) | Output Current (mA) | Supply Min (V) | Supply Max (V) | Temp Range (°C) | Package | Status |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AD8541ARTZ-R2 | Analog Devices | General Purpose | 0.92 | 1 | 4 | 1 | 45 | 30 | 2.7 | 5.5 | -40 to 125 | SOT-23-5 | Discontinued |
| APX321WG-7 | Diodes Inc. | General Purpose | 1 | 1 | 15000 | 1.7 | 110 | 90 | 2.5 | 5.5 | -40 to 85 | SOT-25 | Active |
| AZV321KTR-E1 | Diodes Inc. | General Purpose | 1 | 1 | 250000 | 1.7 | 130 | 160 | 2.7 | 5.5 | -40 to 85 | SOT-23-5 | Active |
| BU7241G-TR | Rohm Semiconductor | General Purpose | 0.4 | 0.9 | 1 | 1 | 70 | 12 | 1.8 | 5.5 | -40 to 85 | 5-SSOP | Active |
| LMV321IDBVR | UMW | Voltage Feedback | — | 1 | 10 | 0.8 | 45 | 25 | 2.1 | 5.5 | -25 to 85 | SOT-23-5 | Active |
| LMV321IDBVT | Texas Instruments | General Purpose | 1 | 1 | 15000 | 1.7 | 130 | — | 2.7 | 5.5 | -40 to 125 | SOT-23-5 | Active |
| LMV321LILT | STMicroelectronics | General Purpose | 0.7 | 1.3 | 27000 | 1 | 130 | 70 | 2.7 | 5.5 | -40 to 125 | SOT-23-5 | Active |
| LMV321M5 | Texas Instruments | General Purpose | 1 | 1 | 15000 | 1.7 | 130 | 160 | 2.7 | 5.5 | -40 to 85 | SOT-23-5 | Obsolete |
| LMV321M5/NOPB | Texas Instruments | General Purpose | 1 | 1 | 15000 | 1.7 | 130 | 160 | 2.7 | 5.5 | -40 to 85 | SOT-23-5 | Active |
| LMV321Q1M5X/NOPB | Texas Instruments | General Purpose | 1 | 1 | 15000 | 1.7 | 130 | — | 2.7 | 5.5 | -40 to 125 | SOT-23-5 | Active |
| LMV321Q3M5/NOPB | Texas Instruments | General Purpose | 1 | 1 | 15000 | 1.7 | 130 | — | 2.7 | 5.5 | -40 to 85 | SOT-23-5 | Active |
Engineering Selection Recommendations
Tier 1 - Direct Substitutes (Highest Compatibility):
LMV321IDBVT (Texas Instruments) and LMV321Q1M5X/NOPB (Texas Instruments) are the primary recommended substitutes. Both parts maintain the extended operating temperature range (-40°C to 125°C) matching the original AD8541ARTZ-R2, feature SOT-23-5 packaging, and are in active production status. LMV321IDBVT provides standard industrial-grade operation, while LMV321Q1M5X/NOPB includes AEC-Q100 automotive qualification for applications requiring automotive-grade components.
LMV321LILT (STMicroelectronics) is an alternative Tier 1 substitute offering extended temperature range (-40°C to 125°C), SOT-23-5 packaging, and active product status. This part exhibits slightly higher gain bandwidth product (1.3 MHz) and improved slew rate characteristics (0.7 V/µs).
Tier 2 - Compatible Substitutes (Acceptable for Most Applications):
LMV321M5/NOPB (Texas Instruments) provides SOT-23-5 packaging and active status but operates within a reduced temperature range (-40°C to 85°C). This part is suitable for applications not requiring extended high-temperature operation.
LMV321Q3M5/NOPB (Texas Instruments) offers automotive-grade qualification (AEC-Q100) in SOT-23-5 packaging with active status, though limited to -40°C to 85°C operating range.
AZV321KTR-E1 (Diodes Incorporated) provides SOT-23-5 packaging and active status with higher output current capability (160 mA), suitable for applications requiring increased drive capability. Operating temperature range is limited to -40°C to 85°C.
Tier 3 - Package Variant Substitutes:
APX321WG-7 (Diodes Incorporated) is packaged in SOT-25 rather than SOT-23-5, requiring PCB layout modification. This part is active and offers higher output current (90 mA) but operates within -40°C to 85°C range.
BU7241G-TR (Rohm Semiconductor) is packaged in 5-SSOP, incompatible with SOT-23-5 footprints, and exhibits reduced slew rate (0.4 V/µs) and lower output current (12 mA). This part is not recommended as a direct substitute due to package incompatibility and performance limitations.
Compliance Considerations:
All recommended Tier 1 and Tier 2 substitutes carry RoHS3 compliance and REACH Unaffected status, meeting current environmental and regulatory requirements. The original AD8541ARTZ-R2 carries REACH Unaffected status, ensuring regulatory continuity with substitute selections.
Frequently Asked Questions (FAQ)
Q: Can the LMV321IDBVT directly replace the AD8541ARTZ-R2 without PCB modifications?
A: Yes. Both parts use identical SOT-23-5 packaging (SC-74A, SOT-753) and share the same pinout configuration. No PCB layout changes are required for direct substitution.
Q: What is the primary difference between LMV321IDBVT and LMV321Q1M5X/NOPB?
A: LMV321Q1M5X/NOPB includes AEC-Q100 automotive qualification and is rated for extended temperature operation (-40°C to 125°C), matching the original AD8541ARTZ-R2. LMV321IDBVT operates within -40°C to 85°C. Select LMV321Q1M5X/NOPB for automotive applications or designs requiring full -40°C to 125°C operation.
Q: Why is BU7241G-TR not recommended as a substitute?
A: BU7241G-TR uses 5-SSOP packaging, which is physically incompatible with SOT-23-5 footprints. Additionally, this part exhibits reduced slew rate (0.4 V/µs versus 0.92 V/µs) and lower output current capability (12 mA versus 30 mA), limiting its suitability for applications designed around the original part's performance envelope.
Q: Is the LMV321LILT suitable for high-temperature applications?
A: Yes. LMV321LILT operates across the full -40°C to 125°C temperature range, matching the original AD8541ARTZ-R2. This part also offers improved gain bandwidth product (1.3 MHz) and is manufactured by STMicroelectronics with active product status.
Q: What supply current differences exist between substitute options?
A: The original AD8541ARTZ-R2 draws 45 µA supply current. Most recommended substitutes (LMV321 series) draw 130 µA. For applications with strict power budget constraints, LMV321IDBVR (UMW) matches the original 45 µA supply current, though it operates within -25°C to 85°C temperature range.
Q: Are all recommended substitutes RoHS compliant?
A: All Tier 1 and Tier 2 recommended substitutes carry RoHS3 compliance. The original AD8541ARTZ-R2 is not explicitly marked as RoHS compliant in available documentation. Substitute selection ensures compliance with current environmental regulations.
Q: Can APX321WG-7 be used if PCB redesign is acceptable?
A: APX321WG-7 uses SOT-25 packaging instead of SOT-23-5, requiring PCB footprint modification. While functionally compatible as a general-purpose amplifier, this substitution introduces design risk and manufacturing complexity. SOT-23-5 alternatives are preferred to maintain design integrity.
Q: What is the input bias current difference between the original part and substitutes?
A: The AD8541ARTZ-R2 exhibits 4 pA input bias current. Most LMV321 variants show 15 nA to 27 nA input bias current. For precision applications sensitive to input bias current, LMV321IDBVR (10 pA) provides closer performance matching, though with reduced temperature range.
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