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LPV324MX Equivalent & Substitute Parts
Part Overview
The LPV324MX is a general purpose operational amplifier manufactured by Texas Instruments, configured as a 4-circuit rail-to-rail amplifier in a 14-SOIC surface mount package. This device is classified as obsolete, which necessitates identification of active equivalent and substitute components for ongoing design support and procurement continuity. The LPV324MX operates across a 2.7 V to 5 V supply range with low input bias current and is suitable for low-power analog signal processing applications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | LPV324MX |
| Manufacturer | Texas Instruments |
| Category | Linear, Amplifiers |
| Amplifier Type | General Purpose |
| Number of Circuits | 4 |
| Output Type | Rail-to-Rail |
| Package / Case | 14-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| Voltage - Supply Span (Min) | 2.7 V |
| Voltage - Supply Span (Max) | 5 V |
| Operating Temperature | -40°C ~ 85°C |
| Product Status | Obsolete |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the LPV324MX is determined by the following critical parameters:
Mechanical Compatibility:
- Package type: 14-SOIC surface mount configuration
- Package dimensions: 0.154" width (3.90mm) for direct footprint compatibility
- Mounting type: Surface mount
Electrical Compatibility:
- Number of circuits: 4 independent amplifier channels
- Output type: Rail-to-rail operation
- Supply voltage range: Minimum 2.7 V, maximum 5 V (or higher)
- Operating temperature range: -40°C to 85°C (or extended)
Functional Compatibility:
- Amplifier type: General purpose or CMOS configurations
- Input bias current: Low current operation (nanoampere to picoampere range)
- Voltage offset: Approximately 1 mV to 1.5 mV
Substitute parts are grouped into two categories:
Direct Equivalents (Identical Package & Pinout): Parts maintaining the exact 14-SOIC (0.154", 3.90mm) package with identical electrical performance characteristics.
Functional Equivalents (Compatible Package Family): Parts with 14-SOIC or 14-SOP packages that provide equivalent circuit functionality with potentially enhanced performance specifications while maintaining mechanical and electrical compatibility.
Parameter Comparison
| Part Number | Manufacturer | Amplifier Type | Number of Circuits | Output Type | Slew Rate (V/µs) | Gain Bandwidth Product (MHz) | Current - Input Bias | Voltage - Input Offset (mV) | Current - Supply (µA) | Voltage - Supply Min (V) | Voltage - Supply Max (V) | Operating Temp (°C) | Package | Product Status |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| LPV324MX | Texas Instruments | General Purpose | 4 | Rail-to-Rail | 0.1 | 0.152 | 2 nA | 1.5 | 28 | 2.7 | 5 | -40 ~ 85 | 14-SOIC (0.154") | Obsolete |
| LPV324MX/NOPB | Texas Instruments | General Purpose | 4 | Rail-to-Rail | 0.1 | 0.152 | 2 nA | 1.5 | 28 | 2.7 | 5 | -40 ~ 85 | 14-SOIC (0.154") | Active |
| MAX4483ASD+T | Analog Devices Inc./Maxim Integrated | General Purpose | 4 | Rail-to-Rail | 0.08 | 0.140 | 0.1 pA | 1 | 50 | 2.5 | 5.5 | -40 ~ 125 | 14-SOIC (0.154") | Active |
| MCP6484-E/SL | Microchip Technology | General Purpose | 4 | Rail-to-Rail | 2.7 | 4 | 1 pA | 1.5 | 240 | 2.2 | 5.5 | -40 ~ 125 | 14-SOIC (0.154") | Active |
| MCP6484T-E/SL | Microchip Technology | General Purpose | 4 | Rail-to-Rail | 2.7 | 4 | 1 pA | 1.5 | 240 | 2.2 | 5.5 | -40 ~ 125 | 14-SOIC (0.154") | Active |
| MCP6494-E/SL | Microchip Technology | General Purpose | 4 | Rail-to-Rail | 6 | 7.5 | 1 pA | 1.5 | 530 | 2.4 | 5.5 | -40 ~ 125 | 14-SOIC (0.154") | Active |
| MCP6494T-E/SL | Microchip Technology | General Purpose | 4 | Rail-to-Rail | 6 | 7.5 | 1 pA | 1.5 | 530 | 2.4 | 5.5 | -40 ~ 125 | 14-SOIC (0.154") | Active |
| MCP6474-E/SL | Microchip Technology | CMOS | 4 | Rail-to-Rail | 1.1 | 2 | 1 pA | 1.5 | 100 | 2 | 5.5 | -40 ~ 125 | 14-SOIC (0.154") | Active |
| MCP6474T-E/SL | Microchip Technology | CMOS | 4 | Rail-to-Rail | 1.1 | 2 | 1 pA | 1.5 | 100 | 2 | 5.5 | -40 ~ 125 | 14-SOIC (0.154") | Active |
| BU7487F-E2 | Rohm Semiconductor | CMOS | 4 | Rail-to-Rail | 10 | 10 | 1 pA | 1 | 6000 | 3 | 5.5 | -40 ~ 105 | 14-SOP (0.173") | Active |
| LMR934F-GE2 | Rohm Semiconductor | General Purpose | 4 | Rail-to-Rail | 0.35 | 1.4 | 5 nA | 1 | 250 | 1.8 | 5 | -40 ~ 85 | 14-SOP (0.173") | Active |
Engineering Selection Recommendations
Primary Direct Equivalent:
LPV324MX/NOPB is the active production equivalent of the obsolete LPV324MX. This part maintains identical electrical specifications, package dimensions (14-SOIC 0.154"), and operating characteristics. It is ROHS3 compliant and carries unlimited moisture sensitivity rating (MSL 1). This part provides direct substitution with no design modifications required.
High-Performance General Purpose Alternatives (14-SOIC 0.154" Package):
The MCP6484-E/SL, MCP6484T-E/SL, MCP6494-E/SL, and MCP6494T-E/SL from Microchip Technology are active general purpose amplifiers in the identical 14-SOIC package footprint. These parts offer enhanced slew rate and gain bandwidth product specifications compared to the LPV324MX, with extended operating temperature ranges to 125°C. All are ROHS3 compliant with MSL 1 rating. The MCP6494 series provides the highest bandwidth performance (7.5 MHz) at the cost of increased supply current (530 µA).
Low-Bias Current Alternative (14-SOIC 0.154" Package):
The MAX4483ASD+T from Analog Devices Inc./Maxim Integrated offers extremely low input bias current (0.1 pA) in the identical 14-SOIC package. This part extends the maximum supply voltage to 5.5 V and operating temperature to 125°C. It is ROHS3 compliant with MSL 1 rating.
CMOS Alternatives (14-SOIC 0.154" Package):
The MCP6474-E/SL and MCP6474T-E/SL from Microchip Technology provide CMOS amplifier configurations with 1 pA input bias current and extended temperature range to 125°C. These parts maintain the identical 14-SOIC package footprint and are ROHS3 compliant with MSL 1 rating.
Package-Compatible Alternatives (14-SOP 0.173" Package):
The BU7487F-E2 from Rohm Semiconductor is a CMOS amplifier with superior slew rate (10 V/µs) and gain bandwidth product (10 MHz). The LMR934F-GE2 from Rohm Semiconductor is a general purpose amplifier with extended minimum supply voltage (1.8 V). Both use the 14-SOP package (0.173" width), which is mechanically compatible with 14-SOIC footprints on standard PCB layouts. Both are ROHS3 compliant with MSL 1 rating and active product status.
Frequently Asked Questions (FAQ)
Q: Can LPV324MX/NOPB be used as a direct replacement for LPV324MX?
A: Yes. LPV324MX/NOPB is the active production equivalent with identical electrical specifications, package dimensions, and pinout. No design modifications are required.
Q: What is the primary reason to substitute the LPV324MX?
A: The LPV324MX is classified as obsolete. LPV324MX/NOPB provides continuity of supply as the active equivalent. Alternative parts offer enhanced performance specifications or extended operating ranges.
Q: Are all substitute parts compatible with the LPV324MX PCB footprint?
A: Parts specified with 14-SOIC (0.154", 3.90mm) package are direct footprint compatible. Parts with 14-SOP (0.173", 4.40mm) package are mechanically compatible on standard PCB layouts but have slightly different package dimensions. Verify PCB layout clearances for 14-SOP variants.
Q: What is the difference between MCP6484 and MCP6494 series?
A: Both are general purpose amplifiers in 14-SOIC packages. The MCP6494 series provides higher slew rate (6 V/µs vs. 2.7 V/µs) and gain bandwidth product (7.5 MHz vs. 4 MHz) at the cost of increased supply current (530 µA vs. 240 µA).
Q: Which substitute offers the lowest input bias current?
A: The MAX4483ASD+T offers 0.1 pA input bias current, significantly lower than the LPV324MX (2 nA). The MCP6484, MCP6494, and MCP6474 series offer 1 pA input bias current.
Q: Can CMOS amplifiers (MCP6474, BU7487F-E2) replace the general purpose LPV324MX?
A: CMOS amplifiers provide equivalent 4-circuit rail-to-rail functionality with lower input bias current (1 pA) and extended temperature ranges. They are functionally compatible but exhibit different slew rate and bandwidth characteristics. Application-specific performance requirements determine suitability.
Q: What is the packaging difference between tube and tape & reel options?
A: Tube packaging (MCP6484-E/SL, MCP6494-E/SL, MCP6474-E/SL) is suitable for lower-volume applications. Tape & Reel packaging (MCP6484T-E/SL, MCP6494T-E/SL, MCP6474T-E/SL, MAX4483ASD+T) is optimized for high-volume automated assembly. Electrical specifications are identical between packaging variants.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All substitute parts listed are ROHS3 compliant with MSL 1 (unlimited) moisture sensitivity rating, matching the compliance profile of the LPV324MX.
Q: What is the minimum supply voltage for each substitute?
A: LPV324MX and LPV324MX/NOPB: 2.7 V. MAX4483ASD+T: 2.5 V. MCP6484 series: 2.2 V. MCP6494 series: 2.4 V. MCP6474 series: 2 V. LMR934F-GE2: 1.8 V. BU7487F-E2: 3 V. Verify minimum supply voltage compatibility with application requirements.
Q: Which substitute offers the widest operating temperature range?
A: MCP6484, MCP6494, MCP6474, and MAX4483ASD+T all operate from -40°C to 125°C, extending the LPV324MX range (-40°C to 85°C) by 40°C at the upper limit.
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