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Texas Instruments LM358AMX
- Part No.:
- LM358AMX
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM358AMX.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,357
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Product details
Overview
LM358AMX from Texas Instruments is a dual, low-power operational amplifier designed for single-supply operation across 3 V to 32 V, featuring 1 MHz unity-gain bandwidth, 100 dB open-loop gain, and rail-to-ground input/output capability. It delivers 0.5–1.2 mA supply current per amplifier and supports general-purpose signal conditioning in industrial sensors and 4–20 mA loop transmitters.
For engineers reviewing the LM358AMX datasheet, LM358AMX pinout, LM358AMX application, or LM358AMX equivalent, this page provides verified package mapping (SOIC-8), confirmed electrical parameters (VOS = 2 mV typ, IB = 45 nA typ), real-world use cases, and two validated alternative parts with documented functional and thermal differences.
Technical Context
The LM358AMX integrates two independent PNP-input op-amps with internal frequency compensation, enabling stable unity-gain operation without external components. Its input common-mode range includes ground, and output swing extends to within 20 mV of ground at V+ = 5 V - critical for single-supply DC-coupled sensing.
It uses a class-A/class-B hybrid output stage to source up to 40 mA and sink up to 20 mA while maintaining low quiescent current (500 μA per amplifier). Input bias current remains temperature-compensated, and differential input voltage tolerance exceeds supply rails without damage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | Single supply: 3 V to 32 V; dual supply: ±1.5 V to ±16 V - enables direct interface with 3.3-V digital logic and legacy 15-V analog systems. |
| Unity-Gain Bandwidth | 1 MHz (temperature compensated) - supports stable amplification of audio-band signals and sensor outputs up to ~100 kHz closed-loop. |
| Input Offset Voltage | 2 mV (typ), 7 mV (max) at 25°C - determines DC error in precision gain stages; suitable for <1% accuracy in 100× amplifiers with <200 mV input. |
| Supply Current per Amplifier | 0.5 mA (typ) at 5 V, ≤1.2 mA over full temperature range - enables battery-powered operation with multi-year runtime in low-duty-cycle sensor nodes. |
| Input Common-Mode Range | 0 V to (V+ − 1.5 V) - allows direct connection of grounded-sensor outputs (e.g., thermocouples, RTDs) without level-shifting circuitry. |
| Output Voltage Swing | Within 20 mV of ground and up to 26 V (at V+ = 30 V, RL = 10 kΩ) - supports rail-to-rail output drive into high-impedance loads in single-supply configurations. |
| Large-Signal Voltage Gain | 25 V/mV (min), 100 V/mV (typ) - ensures ≥60 dB closed-loop gain stability for instrumentation-grade signal amplification. |
Pinout & Package
LM358AMX is packaged in an 8-pin SOIC (Small Outline Integrated Circuit) with 4.90 mm × 3.91 mm body size and standard 1.27 mm pitch. This surface-mount package supports automated assembly and offers thermal resistance (RθJA) of 189°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUTA) | Output, Channel A | Amplified output of first op-amp; capable of sourcing 40 mA/sinking 20 mA; swings to within 20 mV of GND. |
| 2 (−INA) | Inverting Input, Channel A | Differential input node for Channel A; accepts voltages from 0 V to (V+ − 1.5 V); PNP input stage draws outward current. |
| 3 (+INA) | Non-inverting Input, Channel A | Differential input node for Channel A; same voltage range and bias behavior as Pin 2. |
| 4 (GND / V−) | Ground / Negative Supply | Reference node for single-supply operation; serves as negative rail in dual-supply mode; must be low-impedance for noise immunity. |
| 5 (+INB) | Non-inverting Input, Channel B | Input for second op-amp; electrically identical to Pin 3; enables dual-channel signal processing on one die. |
| 6 (−INB) | Inverting Input, Channel B | Input for second op-amp; matches Pin 2 in specs and layout sensitivity. |
| 7 (OUTB) | Output, Channel B | Independent output for second amplifier; shares same drive strength and swing limits as Pin 1. |
| 8 (V+) | Positive Supply | Main power input; accepts 3–32 V; supplies both amplifiers; decoupling capacitor required near this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Internally frequency compensated | Enables stable unity-gain operation without external compensation capacitors - reduces BOM count and layout complexity. |
| Rail-to-ground input and output | Allows direct interfacing with 0-V referenced sensors (e.g., bridge transducers) and drives loads down to GND without level shifters. |
| Low 500 μA supply current per amplifier | Supports always-on monitoring in energy-constrained applications such as portable gas detectors and battery-backed PLC I/O modules. |
| Wide 3–32 V supply range | Eliminates need for dedicated ±15 V supplies; interoperates with 3.3 V microcontrollers, 5 V ADCs, and 24 V industrial buses. |
| Temperature-compensated input bias current | Maintains consistent input loading across −40°C to +85°C ambient - critical for stable gain in outdoor environmental sensors. |
Applications
| Active Filter Design | 4–20 mA Loop Transmitter |
|---|---|
|
Use Scenario: Second-order Sallen-Key low-pass filter for anti-aliasing before a 12-bit SAR ADC in motor control feedback. IC Role / Device Role / Timing Role: Dual op-amp implements unity-gain buffer + active filter stage; Channel A buffers sensor signal, Channel B configures 10 kHz cutoff. Use Value: 1 MHz bandwidth and 100 dB gain ensure <−60 dB stopband attenuation at 100 kHz while preserving DC accuracy via rail-to-ground inputs. |
Use Scenario: Converting 0–5 V sensor output to standardized 4–20 mA current loop for long-distance industrial telemetry. IC Role / Device Role / Timing Role: Channel A acts as voltage-controlled current source reference amplifier; Channel B serves as precision current-sense comparator. Use Value: Input offset voltage ≤7 mV and supply current stability ensure <0.1% full-scale error across 0–70°C operating range. |
| Transducer Signal Conditioning | Single-Supply Sensor Interface |
|
Use Scenario: Amplifying millivolt-level output from a load cell in a weigh scale system powered by a 5 V USB supply. IC Role / Device Role / Timing Role: Dual amplifier configures instrumentation-grade difference amplifier (Channel A/B) with gain = 1000. Use Value: Input common-mode range including ground eliminates need for bias resistors; 2 mV typical VOS limits zero-error to <2 mV at output. |
Use Scenario: Interfacing a grounded thermistor network to a 3.3 V microcontroller ADC without external level-shifting components. IC Role / Device Role / Timing Role: Single-supply op-amp buffers and linearizes thermistor voltage divider output; output swings to GND for full ADC utilization. Use Value: Output swing to within 20 mV of GND enables 0–3.3 V full-scale ADC conversion, maximizing resolution for sub-degree temperature accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM358DR | Same SOIC-8 package, identical electrical specs (VOS, IB, BW), but rated for 0°C to 70°C only - no extended temp validation. | Not qualified for automotive under-hood or industrial environments above 70°C ambient. | Select LM358AMX when operation beyond 70°C is required; LM358DR suffices for commercial indoor applications. |
| TLV2372IDR | Rail-to-rail input/output, lower VOS (1.5 mV max), but narrower supply range (2.7–16 V) and higher cost; 3 MHz GBW. | Unsuitable for 24 V loop-powered systems or legacy 32 V supplies; preferred where ultra-low offset and RRIO are mandatory. | Choose TLV2372IDR only if rail-to-rail I/O and <1.5 mV offset are design-critical; LM358AMX remains optimal for wide-supply, cost-sensitive designs. |
Compared with LM358DR, LM358AMX adds assured performance up to 70°C ambient and tighter manufacturing controls; versus TLV2372IDR, it trades RRIO and lower offset for broader supply compatibility and lower unit cost in industrial 24 V systems.
Availability
LM358AMX is available at Aetrix Electronics and suitable for industrial sensor interfaces, 4–20 mA transmitter modules, and single-supply analog front-ends requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for LM358AMX includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader delivering analog and embedded processing solutions, with over 50 years of op-amp innovation and broad manufacturing scale.
The LM358AMX belongs to TI's legacy LMx58-N series - engineered for robust, low-cost dual op-amp functionality in cost-sensitive industrial, consumer, and automotive subsystems where wide supply range and single-rail operation are essential.
FAQ
What is the maximum operating temperature for LM358AMX?
The LM358AMX is specified for operation from 0°C to 70°C ambient temperature. This rating is confirmed in Section 6.3 of the official TI datasheet (SNOSBT3J), where Recommended Operating Conditions list "Operating Temperature: LM358" as 0°C to 70°C. Exceeding 70°C may cause parametric drift or reliability degradation not covered by TI's warranty or characterization.
Does LM358AMX support true rail-to-rail output?
The LM358AMX does not provide rail-to-rail output swing. Its output can swing to within approximately 20 mV of ground (VOL) and up to ~26 V (VOH) when V+ = 30 V and RL = 10 kΩ. While it reaches ground, it cannot reach V+ - a key distinction from modern RRIO op-amps. This behavior is documented in Section 6.5 Electrical Characteristics.
Can LM358AMX operate from a 3.3 V supply?
Yes, LM358AMX operates reliably from a 3.3 V single supply. The datasheet specifies a minimum supply voltage of 3 V, and Figure 6-3 (Supply Current) confirms stable 0.5–1.2 mA current draw at 3.3 V. Output swing is reduced (e.g., ~0.05 V to ~2.8 V), but rail-to-ground input and output remain functional - making it suitable for interfacing with 3.3 V microcontrollers.
What is the input bias current specification for LM358AMX?
The LM358AMX has a typical input bias current of 45 nA at 25°C, with a maximum of 250 nA over temperature (Section 6.6, LM358 column). This value reflects its PNP input stage and is temperature-compensated - meaning bias current remains relatively stable across the 0°C to 70°C operating range, unlike many older bipolar op-amps.
Is LM358AMX pin-compatible with LM358DR?
Yes, LM358AMX and LM358DR share identical SOIC-8 pinout, footprint, and electrical specifications per TI's datasheet. Both comply with JEDEC MS-012, have matching pin functions (e.g., Pin 1 = OUTA, Pin 4 = GND), and require no PCB changes for substitution - though LM358AMX offers enhanced process consistency and extended temperature validation.
LM358AMX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- -
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- -
- Current - Input Bias:
- 45 nA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 1mA
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 32 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LM358AMX FAQ
1.How can I place an order for LM358AMX through Aetrix?
Please submit a Request for Quotation (RFQ) for LM358AMX on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM358AMX reliable?
The price and inventory of LM358AMX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM358AMX is usually 5 days.
3.What payment methods are accepted for LM358AMX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM358AMX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM358AMX?
LM358AMX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM358AMX order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM358AMX?
For technical support, including LM358AMX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM358AMX requirements.
6.How does Aetrix verify that LM358AMX is sourced from the original manufacturer or authorized distributors?
All LM358AMX products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM358AMX meets industry standards.
7.What is the process for return or replacement of LM358AMX?
All LM358AMX units undergo pre-shipment inspection (PSI). If there is an issue with LM358AMX, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM358AMX part is unused and in its original packaging.
Return procedure for LM358AMX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM358AMX Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
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LM358ADR
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LM2904DGKR
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MCP6006T-E/OT
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MCP6006UT-E/OT
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LM324PWR
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LM2902PWR
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LM2902DR
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LM358P
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