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ADA4891-2ARMZ-RL Equivalent & Substitute Parts
Part Overview
The ADA4891-2ARMZ-RL is a CMOS dual-channel operational amplifier manufactured by Analog Devices Inc., housed in an 8-MSOP surface mount package. This rail-to-rail amplifier operates across a 2.7 V to 5.5 V supply range with a slew rate of 210 V/µs and gain bandwidth product of 105 MHz, making it suitable for high-speed signal conditioning and precision analog applications. The device is ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1) and maintains active product status. Equivalent and substitute parts are identified to address supply chain requirements, packaging preferences, or specific application performance trade-offs while maintaining functional compatibility within defined electrical and mechanical parameters.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | CMOS | — |
| Number of Circuits | 2 | — |
| Output Type | Rail-to-Rail | — |
| Slew Rate | 210 | V/µs |
| Gain Bandwidth Product | 105 | MHz |
| -3dB Bandwidth | 90 | MHz |
| Current - Input Bias | 2 | pA |
| Voltage - Input Offset | 2.5 | mV |
| Current - Supply (x2 Channels) | 4.4 | mA |
| Current - Output / Channel | 125 | mA |
| Voltage - Supply Span (Min) | 2.7 | V |
| Voltage - Supply Span (Max) | 5.5 | V |
| Operating Temperature | -40 to 125 | °C |
| Package / Case | 8-MSOP (0.118", 3.00mm Width) | — |
| Mounting Type | Surface Mount | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitute parts for the ADA4891-2ARMZ-RL are classified into two categories based on parametric alignment and packaging configuration:
Parametric Equivalents maintain identical electrical specifications across all critical performance parameters: CMOS amplifier type, dual-circuit configuration, rail-to-rail output, 210 V/µs slew rate, 105 MHz gain bandwidth product, 90 MHz -3dB bandwidth, 2 pA input bias current, 2.5 mV input offset voltage, 4.4 mA supply current per dual channels, 125 mA output current per channel, 2.7 V to 5.5 V supply range, and -40°C to 125°C operating temperature. These parts differ only in packaging format (Cut Tape & Digi-Reel® versus Tape & Reel) and are direct functional replacements.
Similar Parts share the same package footprint (8-MSOP), dual-circuit configuration, rail-to-rail output capability, surface mount technology, and compatible supply voltage range (2.7 V to 5.5 V minimum, 5.5 V maximum). However, these parts exhibit reduced performance in slew rate, gain bandwidth product, -3dB bandwidth, and supply current specifications. Similar parts are suitable for applications where the ADA4891-2ARMZ-RL performance envelope exceeds system requirements, enabling cost or power consumption optimization. All substitute parts maintain ROHS3 compliance and surface mount 8-MSOP package compatibility.
Parameter Comparison
| Part Number | Manufacturer | Amplifier Type | Circuits | Output Type | Slew Rate (V/µs) | GBW (MHz) | Input Bias (pA) | Input Offset (mV) | Supply Current (mA) | Output Current (mA) | Supply Min (V) | Supply Max (V) | Temp Range (°C) | Package | Packaging Type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ADA4891-2ARMZ-RL | Analog Devices | CMOS | 2 | Rail-to-Rail | 210 | 105 | 2 | 2.5 | 4.4 | 125 | 2.7 | 5.5 | -40 to 125 | 8-MSOP | Tape & Reel |
| ADA4891-2ARMZ-R7 | Analog Devices | CMOS | 2 | Rail-to-Rail | 210 | 105 | 2 | 2.5 | 4.4 | 125 | 2.7 | 5.5 | -40 to 125 | 8-MSOP | Cut Tape & Digi-Reel |
| ADA4891-2WARMZ-R7 | Analog Devices | CMOS | 2 | Rail-to-Rail | 210 | 105 | 2 | 2.5 | 4.4 | 125 | 2.7 | 5.5 | -40 to 125 | 8-MSOP | Cut Tape & Digi-Reel |
| LMP7718MM/NOPB | Texas Instruments | General Purpose | 2 | Rail-to-Rail | 11.5 | 88 | 0.1 | 0.01 | 1.3 | 60 | 2 | 5.5 | -40 to 125 | 8-VSSOP | Tape & Reel |
| LMP7718MME/NOPB | Texas Instruments | General Purpose | 2 | Rail-to-Rail | 11.5 | 88 | 0.1 | 0.01 | 1.3 | 60 | 2 | 5.5 | -40 to 125 | 8-VSSOP | Tape & Reel |
| LMV342MM/NOPB | National Semiconductor | CMOS | 2 | Rail-to-Rail | 1 | 1 | 0.02 | 0.7 | 0.107 | 113 | 2.7 | 5.5 | -40 to 125 | 8-VSSOP | Bulk |
| LMV358DMR2G | onsemi | Voltage Feedback | 2 | Rail-to-Rail | 1 | 1 | 1 | 1.7 | 0.1 | 160 | 2.7 | 5.5 | -40 to 85 | 8-MSOP | Tape & Reel |
| LMV358M8G-13 | Diodes Incorporated | General Purpose | 2 | Rail-to-Rail | 1 | 1 | 15 | 1.7 | 0.19 | 90 | 2.7 | 5.5 | -40 to 125 | 8-MSOP | Cut Tape & Digi-Reel |
| LMV832MM/NOPB | National Semiconductor | CMOS | 2 | — | 2 | 3.3 | 0.1 | 0.25 | 0.47 | 66 | 2.7 | 5.5 | -40 to 125 | 8-VSSOP | — |
| LMV832MME/NOPB | Texas Instruments | CMOS | 2 | — | 2 | 3.3 | 0.1 | 0.25 | 0.47 | 66 | 2.7 | 5.5 | -40 to 125 | 8-VSSOP | Tape & Reel |
| LMV832MMX/NOPB | Texas Instruments | CMOS | 2 | — | 2 | 3.3 | 0.1 | 0.25 | 0.47 | 66 | 2.7 | 5.5 | -40 to 125 | 8-VSSOP | Cut Tape & Digi-Reel |
Engineering Selection Recommendations
Parametric Equivalent Selection (ADA4891-2ARMZ-R7, ADA4891-2WARMZ-R7)
The ADA4891-2ARMZ-R7 and ADA4891-2WARMZ-R7 are direct parametric equivalents of the ADA4891-2ARMZ-RL, differing only in packaging format. Both maintain identical electrical performance specifications and are manufactured by Analog Devices Inc. under active product status. Selection between these equivalents depends on procurement and assembly requirements: the ADA4891-2ARMZ-RL is supplied in Tape & Reel format, while the R7 variants are supplied in Cut Tape & Digi-Reel® format. All three variants maintain ROHS3 compliance, MSL 1 rating, and -40°C to 125°C operating temperature range. These equivalents are suitable for direct board-level substitution without circuit redesign.
Similar Part Selection (LMP7718MM/NOPB, LMP7718MME/NOPB, LMV342MM/NOPB, LMV358DMR2G, LMV358M8G-13, LMV832MM/NOPB, LMV832MME/NOPB, LMV832MMX/NOPB)
Similar parts are suitable for applications where the ADA4891-2ARMZ-RL performance specifications exceed system requirements. These alternatives maintain dual-circuit configuration, surface mount technology, and compatible supply voltage range (2.7 V to 5.5 V). However, all similar parts exhibit significantly reduced slew rate (1 V/µs to 11.5 V/µs versus 210 V/µs) and gain bandwidth product (1 MHz to 88 MHz versus 105 MHz). Selection of similar parts requires circuit-level analysis to confirm that reduced bandwidth and slew rate performance remain acceptable for the intended application. All similar parts maintain ROHS3 compliance and active product status. The LMV358DMR2G operates to -40°C to 85°C, which is narrower than the ADA4891-2ARMZ-RL temperature range; applications requiring full -40°C to 125°C operation must exclude this part.
Frequently Asked Questions (FAQ)
Q: Can the ADA4891-2ARMZ-R7 and ADA4891-2WARMZ-R7 be used as direct replacements for the ADA4891-2ARMZ-RL?
A: Yes. These parts are parametric equivalents with identical electrical specifications. The only difference is packaging format: the original part uses Tape & Reel, while the R7 variants use Cut Tape & Digi-Reel®. All three are suitable for direct board-level substitution without circuit modification.
Q: What is the primary difference between parametric equivalents and similar parts?
A: Parametric equivalents maintain all electrical specifications of the original part and differ only in packaging or supplier format. Similar parts share the same package footprint and dual-circuit configuration but have reduced performance in slew rate, gain bandwidth product, and supply current. Similar parts require circuit-level analysis to confirm compatibility.
Q: Can I substitute a similar part like the LMV358DMR2G for the ADA4891-2ARMZ-RL in a high-speed application?
A: No. The LMV358DMR2G has a slew rate of 1 V/µs and gain bandwidth product of 1 MHz, compared to 210 V/µs and 105 MHz for the ADA4891-2ARMZ-RL. This 100-fold reduction in bandwidth makes it unsuitable for high-speed signal conditioning. Similar parts are appropriate only for low-bandwidth applications where the original part's performance exceeds requirements.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All parametric equivalents and similar parts listed maintain ROHS3 compliance. Compliance certifications are identical across all substitutes.
Q: Does the LMV358DMR2G have the same operating temperature range as the ADA4891-2ARMZ-RL?
A: No. The LMV358DMR2G operates from -40°C to 85°C, while the ADA4891-2ARMZ-RL operates from -40°C to 125°C. Applications requiring operation above 85°C must use the original part or other substitutes with extended temperature range.
Q: What is the moisture sensitivity level (MSL) for all substitute parts?
A: The ADA4891-2ARMZ-RL, ADA4891-2ARMZ-R7, ADA4891-2WARMZ-R7, and most similar parts maintain MSL 1 (Unlimited). The exception is LMV358M8G-13, which has MSL 3 (168 Hours). MSL 3 parts require controlled storage and handling to prevent moisture absorption during extended shelf storage.
Q: Can I use the LMV832 series parts as substitutes for high-frequency applications?
A: No. The LMV832 series (LMV832MM/NOPB, LMV832MME/NOPB, LMV832MMX/NOPB) has a gain bandwidth product of only 3.3 MHz and slew rate of 2 V/µs, making them unsuitable for the 105 MHz bandwidth and 210 V/µs slew rate requirements of the ADA4891-2ARMZ-RL. These parts are appropriate only for low-bandwidth applications.
Q: What is the difference between the LMP7718MM/NOPB and LMP7718MME/NOPB?
A: Both parts are identical in electrical specifications and performance. The difference is in packaging format: LMP7718MM/NOPB is supplied in standard Tape & Reel, while LMP7718MME/NOPB is also supplied in Tape & Reel. Selection depends on procurement availability and assembly line requirements.
Q: Are the 8-MSOP and 8-VSSOP packages pin-compatible?
A: Both packages are 8-pin surface mount packages with 0.118" (3.00mm) width and compatible pinout for dual operational amplifier configurations. However, physical package dimensions differ slightly. Verify PCB footprint compatibility before substituting parts with different package designations (MSOP versus VSSOP).
Q: Which similar part offers the lowest power consumption?
A: The LMV342MM/NOPB has the lowest supply current at 0.107 mA (x2 channels), compared to 4.4 mA for the ADA4891-2ARMZ-RL. However, this part has significantly reduced bandwidth (1 MHz) and slew rate (1 V/µs), making it suitable only for ultra-low-power, low-bandwidth applications.
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