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LMP7732MA/NOPB Equivalent & Substitute Parts
Part Overview
The LMP7732MA/NOPB is a general purpose operational amplifier manufactured by Texas Instruments, featuring dual circuits in an 8-SOIC surface mount package. This device operates across a supply voltage range of 1.8V to 5.5V with rail-to-rail output capability, making it suitable for low-voltage analog signal processing applications. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).
Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this product category.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | General Purpose | — |
| Number of Circuits | 2 | — |
| Output Type | Rail-to-Rail | — |
| Slew Rate | 2.4 | V/µs |
| Gain Bandwidth Product | 22 | MHz |
| Current - Input Bias | 14 | nA |
| Voltage - Input Offset | 6 | µV |
| Current - Supply (x2 Channels) | 5 | mA |
| Current - Output / Channel | 49 | mA |
| Voltage - Supply Span (Min) | 1.8 | V |
| Voltage - Supply Span (Max) | 5.5 | V |
| Operating Temperature | -40 to 125 | °C |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | — |
| Mounting Type | Surface Mount | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitute parts for the LMP7732MA/NOPB are grouped based on the following critical parameters that determine functional equivalence:
Primary Compatibility Criteria:
- Dual-circuit configuration (2 circuits minimum)
- Rail-to-rail output capability
- Supply voltage range: 1.8V to 5.5V minimum
- Surface mount package with 8-pin SOIC or SOP footprint
- Operating temperature range: -40°C to 125°C minimum
- ROHS3 compliance and active product status
Secondary Performance Parameters:
- Slew rate ≥ 1.0 V/µs (maintains signal fidelity for dynamic applications)
- Gain bandwidth product ≥ 2 MHz (supports frequency response requirements)
- Input bias current ≤ 14 nA (maintains input impedance characteristics)
- Output current per channel ≥ 22 mA (ensures load driving capability)
Substitutes are organized into two categories: direct replacements with comparable performance metrics, and functional alternatives with reduced performance specifications suitable for lower-bandwidth applications.
Parameter Comparison
| Part Number | Manufacturer | Amplifier Type | Slew Rate (V/µs) | GBW (MHz) | Input Bias (pA/nA) | Supply Current (µA/mA) | Output Current/Ch (mA) | Temp Range (°C) | Package | MSL |
|---|---|---|---|---|---|---|---|---|---|---|
| LMP7732MA/NOPB | Texas Instruments | General Purpose | 2.4 | 22 | 14 nA | 5 mA | 49 | -40 to 125 | 8-SOIC | 1 |
| OPA2379AID | Texas Instruments | General Purpose | 0.03 | 0.09 | 5 pA | 2.9 µA | 5 | -40 to 125 | 8-SOIC | 2 |
| OPA2379AIDR | Texas Instruments | General Purpose | 0.03 | 0.09 | 5 pA | 2.9 µA | 5 | -40 to 125 | 8-SOIC | 2 |
| ISL28213FBZ | Renesas Electronics | General Purpose | 1.0 | 2 | 3 pA | 90 µA | 22 | -40 to 125 | 8-SOIC | 1 |
| ISL28214FBZ | Renesas Electronics | General Purpose | 2.5 | 5 | 3 pA | 300 µA | 31 | -40 to 125 | 8-SOIC | 1 |
| ISL28214FBZ-T13 | Renesas Electronics | General Purpose | 2.5 | 5 | 3 pA | 300 µA | 31 | -40 to 125 | 8-SOIC | 1 |
| ISL28214FBZ-T7 | Renesas Electronics | General Purpose | 2.5 | 5 | 3 pA | 300 µA | 31 | -40 to 125 | 8-SOIC | 1 |
| LMR932F-GE2 | Rohm Semiconductor | General Purpose | 0.35 | 1.4 | 5 nA | 140 µA | 90 | -40 to 85 | 8-SOP | 1 |
| BU7266F-E2 | Rohm Semiconductor | CMOS | 0.0024 | 0.004 | 1 pA | 700 nA | 4 | -40 to 85 | 8-SOP | 1 |
| BU7266SF-E2 | Rohm Semiconductor | CMOS | 0.0024 | 0.004 | 1 pA | 700 nA | 4 | -40 to 105 | 8-SOP | 1 |
| BU7486F-E2 | Rohm Semiconductor | CMOS | 10 | 10 | 1 pA | 6 mA | 12 | -40 to 105 | 8-SOP | 1 |
Engineering Selection Recommendations
Direct Performance Equivalents (Tier 1):
The ISL28214FBZ, ISL28214FBZ-T13, and ISL28214FBZ-T7 from Renesas Electronics Corporation provide the closest functional match to the LMP7732MA/NOPB. These parts maintain the same 8-SOIC package footprint, dual-circuit configuration, rail-to-rail output, and full -40°C to 125°C operating temperature range. Slew rate (2.5 V/µs) and gain bandwidth product (5 MHz) are within acceptable tolerance of the reference part. All three variants are ROHS3 compliant with MSL 1 rating. The primary difference is packaging format: ISL28214FBZ is supplied in Tube, while ISL28214FBZ-T13 and ISL28214FBZ-T7 are supplied in Tape & Reel format.
Functional Alternatives with Reduced Performance (Tier 2):
The OPA2379AID and OPA2379AIDR from Texas Instruments operate within the same supply voltage range and temperature specifications. However, these parts exhibit significantly reduced slew rate (0.03 V/µs) and gain bandwidth product (90 kHz), making them suitable only for low-frequency signal conditioning applications. MSL rating is 2 (1 Year), requiring controlled storage conditions. These parts are not recommended for applications requiring the dynamic performance of the reference device.
Limited Compatibility Alternatives (Tier 3):
The LMR932F-GE2 from Rohm Semiconductor provides higher output current capability (90 mA per channel) but operates only to 85°C maximum temperature, limiting use in extended temperature range applications. The BU7266F-E2, BU7266SF-E2, and BU7486F-E2 are CMOS amplifiers with significantly different performance characteristics. BU7266 variants are ultra-low power devices unsuitable for applications requiring the output current and bandwidth of the LMP7732MA/NOPB. The BU7486F-E2 offers higher slew rate (10 V/µs) but requires minimum 3V supply voltage, incompatible with 1.8V operation.
Compliance Status:
All listed substitute parts maintain ROHS3 compliance and active product status. Selection should prioritize parts with MSL 1 rating (unlimited moisture sensitivity) for manufacturing environments without controlled humidity.
Frequently Asked Questions (FAQ)
Q: Can the OPA2379AID directly replace the LMP7732MA/NOPB in all applications?
A: No. While both parts share the same 8-SOIC package and supply voltage range, the OPA2379AID has significantly reduced slew rate (0.03 V/µs vs. 2.4 V/µs) and gain bandwidth product (90 kHz vs. 22 MHz). The OPA2379AID is suitable only for DC and very low-frequency applications. Applications requiring signal bandwidth above 100 kHz require the ISL28214 series or equivalent higher-performance alternatives.
Q: What is the difference between ISL28214FBZ, ISL28214FBZ-T13, and ISL28214FBZ-T7?
A: These three part numbers are electrically identical with identical electrical specifications. The difference is packaging format: ISL28214FBZ is supplied in Tube packaging, while ISL28214FBZ-T13 and ISL28214FBZ-T7 are supplied in Tape & Reel format. Selection depends on assembly process requirements and quantity needs. Tube packaging is typically used for lower-volume applications, while Tape & Reel is standard for automated pick-and-place assembly.
Q: Why do the BU7266 and BU7486 parts have such different performance specifications?
A: The BU7266 series (BU7266F-E2, BU7266SF-E2) are ultra-low power CMOS amplifiers designed for battery-powered applications with minimal current consumption (700 nA). The BU7486F-E2 is a higher-performance CMOS amplifier with 10 V/µs slew rate and 10 MHz bandwidth. Neither is suitable as a direct replacement for the LMP7732MA/NOPB due to fundamental design differences and reduced output current capability.
Q: Can I use the LMR932F-GE2 in place of the LMP7732MA/NOPB?
A: The LMR932F-GE2 is compatible for applications operating within -40°C to 85°C temperature range only. It cannot be used in applications requiring operation above 85°C. The LMR932F-GE2 offers superior output current (90 mA per channel vs. 49 mA), making it suitable for higher-load applications within the reduced temperature range. Package footprint is 8-SOP (0.173" width) versus 8-SOIC (0.154" width), requiring PCB layout verification.
Q: What does MSL rating mean for component substitution?
A: MSL (Moisture Sensitivity Level) indicates how long a component can be stored in ambient conditions before requiring baking to remove absorbed moisture. MSL 1 (unlimited) means the part has no moisture sensitivity restrictions. MSL 2 (1 Year) means the part must be used within one year of opening the original packaging or must be baked before use. For manufacturing environments without controlled humidity, MSL 1 parts are preferred to avoid additional process steps.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All listed substitute parts are ROHS3 compliant, matching the compliance status of the LMP7732MA/NOPB. This ensures compatibility with environmental regulations and customer requirements for lead-free components.
Q: What is the significance of the 8-SOIC versus 8-SOP package difference?
A: Both are 8-pin surface mount packages with similar footprints but different body widths. 8-SOIC is 0.154" (3.90mm) wide, while 8-SOP is 0.173" (4.40mm) wide. PCB layouts designed for 8-SOIC cannot directly accommodate 8-SOP packages without layout modification. Verify PCB footprint compatibility before selecting parts with different package designations.
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