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Analog Devices Inc./Maxim Integrated LMX358AUA-T
- Part No.:
- LMX358AUA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LMX358AUA-T.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:3,266
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Product details
Overview
LMX358AUA-T from Maxim Integrated is a dual, general-purpose, rail-to-rail output operational amplifier optimized for low-voltage, battery-powered systems. It operates from a single +2.3V to +7V supply, draws 210µA total quiescent current (105µA per amplifier), delivers 1.3MHz gain-bandwidth, and swings within 40mV of both rails into 2kΩ loads - enabling precision signal conditioning in portable audio and sensor interfaces.
For engineers reviewing the LMX358AUA-T datasheet, LMX358AUA-T pinout, LMX358AUA-T application, or LMX358AUA-T equivalent, key selection criteria include its µMAX-8 package footprint, rail-to-rail output swing at low supply voltage, input common-mode range extending 0.2V below ground, unity-gain stability with up to 400pF capacitive load drive, and compatibility with space-constrained portable designs requiring low quiescent power.
Technical Context
The LMX358AUA-T implements a bipolar-input, rail-to-rail output stage with no phase reversal on overdriven inputs and no crossover distortion. Its input common-mode voltage range spans VEE − 0.2V to VCC − 0.8V (at +2.7V supply), supporting ground-referenced sensing in single-supply configurations.
It achieves unity-gain stability without external compensation while driving resistive loads ≥2kΩ and capacitive loads ≤400pF, with a phase margin of 64° and gain margin of 24dB at CL = 200pF - making it suitable for active filters, sensor amplification, and low-noise signal buffering where layout-induced parasitics must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.3V to +7V single supply - enables direct integration into Li-ion, coin-cell, or regulated 3.3V/5V systems without level-shifting. |
| Quiescent Current | 210µA total (105µA per amplifier) at +2.7V - supports >1-year battery life in always-on sensor nodes. |
| Gain-Bandwidth Product | 1.3MHz - sufficient for anti-aliasing filters, audio preamps, and DC-coupled sensor signal chains up to ~100kHz. |
| Output Swing | Within 40mV of both rails into 2kΩ - preserves dynamic range in low-voltage ADC interfacing (e.g., 12-bit SAR with 2.5V reference). |
| Input Common-Mode Range | VEE − 0.2V to VCC − 0.8V - allows direct connection of ground-referenced transducers without biasing networks. |
| Capacitive Load Drive | Stable with ≤400pF - eliminates need for isolation resistors in PCB traces or small ceramic bypass caps near load. |
| Input Offset Voltage | 1–6mV (typ) at +25°C - suitable for medium-precision applications like battery voltage monitoring or temperature sensor amplification. |
Pinout & Package
The LMX358AUA-T is housed in an 8-pin µMAX® package (pin-compatible with SO-8 and SOT23-8 but with 3mm × 3mm footprint and 0.65mm pitch), offering 40% board area reduction versus SO-8 and improved thermal performance over SOT23-8.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT1 | Amplifier 1 output - rail-to-rail capable; requires local 0.1µF bypass to VEE if driving capacitive loads. |
| 2 | IN1− | Inverting input of Amp1 - high-impedance node; keep trace short and away from noisy signals to minimize offset drift. |
| 3 | IN1+ | Noninverting input of Amp1 - accepts common-mode voltages down to VEE − 0.2V; internal ESD protection diodes present. |
| 4 | VEE | Negative supply - connect to ground in single-supply operation; serves as reference for input common-mode and output swing. |
| 5 | VCC | Positive supply - bypass with 0.1µF ceramic capacitor placed <1mm from pin to suppress supply noise coupling. |
| 6 | IN2+ | Noninverting input of Amp2 - electrically identical to IN1+; supports independent dual-channel signal paths. |
| 7 | IN2− | Inverting input of Amp2 - matched to IN1− for consistent AC/DC performance across both amplifiers. |
| 8 | OUT2 | Amplifier 2 output - fully independent of OUT1; no crosstalk degradation above −120dB at 1kHz per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full-scale signal headroom into 2kΩ loads - avoids clipping in low-voltage data acquisition front-ends. |
| No phase reversal on overdrive | Prevents latch-up or erroneous logic-level transitions when inputs exceed common-mode limits - critical in comparator-like configurations. |
| Input common-mode range below ground | Supports direct interface with bipolar sensors (e.g., thermocouples, bridge outputs) without external level-shifting circuitry. |
| Unity-gain stable with 400pF load | Enables direct driving of ADC input capacitance or long PCB traces without destabilizing feedback networks. |
| Low 105µA per-amplifier ICC | Reduces system power budget by >50% vs. legacy LMV358 - extends runtime in wearable health monitors and IoT edge nodes. |
Applications
| Cellular Phone Audio Path | Laptop Battery Monitoring |
|---|---|
Use Scenario: Amplifying microphone bias and line-in signals in ultra-thin smartphone form factors with tight thermal and power constraints. IC Role / Device Role / Timing Role: Dual op amp providing low-noise preamplification and DC-blocking filtering for analog audio subsystems. Use Value: 105µA per amplifier and rail-to-rail output preserve SNR while fitting within 3mm × 3mm µMAX footprint - reducing PCB layer count and BOM cost. | Use Scenario: Measuring cell voltage and charging current in multi-cell Li-ion packs using differential sensing and shunt-based current detection. IC Role / Device Role / Timing Role: Dual amplifier configured as difference amplifier and current-sense buffer for precision battery management ICs. Use Value: Input common-mode range extending below ground enables accurate shunt measurement referenced to battery negative - eliminating need for isolated power supplies. |
| Portable Medical Sensor Interface | Active Low-Pass Filter for Wearables |
Use Scenario: Conditioning weak bio-potential signals (ECG, EMG) in disposable patch monitors powered by CR2032 coin cells. IC Role / Device Role / Timing Role: Dual op amp implementing programmable-gain instrumentation amplifier front-end and anti-aliasing filter. Use Value: 1.3MHz GBW and 66nV/√Hz input noise support 100Hz bandwidth with <5µVpp integrated noise - meeting AAMI EC11 clinical accuracy requirements. | Use Scenario: Implementing 2nd-order Sallen-Key low-pass filters in hearable devices to suppress RF interference and aliasing before ADC sampling. IC Role / Device Role / Timing Role: Dual op amp used as unity-gain buffer and active filter stage with precise pole placement. Use Value: Unity-gain stability with 400pF capacitive loads ensures predictable cutoff frequency without oscillation - simplifying filter design and validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual, low-voltage, rail-to-rail output op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV358IDR | Higher 170µA/amplifier ICC; 1MHz GBW; input common-mode limited to VEE + 0.2V - no sub-ground operation. | Less suitable for ground-referenced sensor inputs; requires higher supply headroom for same output swing. | Select when legacy LMV358 pin compatibility is mandatory and sub-ground input range is not required. |
| MCP6022-E/SN | CMOS input (0.1pA IB); 10MHz GBW; 1mA/amplifier ICC; rail-to-rail input/output; 2.7V–5.5V supply only. | Better for high-impedance pH or photodiode sensors; unsuitable for 2.3V–2.7V coin-cell operation due to minimum supply limit. | Select for ultra-low input bias current or higher speed where power budget allows 5× higher ICC. |
Compared with LMV358IDR and MCP6022-E/SN, the LMX358AUA-T uniquely balances sub-ground input capability, ultra-low 105µA/amplifier quiescent current, and 2.3V minimum supply - making it optimal for space- and energy-constrained portable systems where ground-referenced signal integrity is essential.
Availability
LMX358AUA-T is available at Aetrix Electronics and suitable for portable medical devices, battery fuel gauging circuits, and low-power audio subsystems requiring stable component supply across extended product lifecycles.
Supply support for LMX358AUA-T 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
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The LMX321/LMX358/LMX324 family was developed specifically to replace LMV3xx op amps in portable equipment - delivering rail-to-rail output, extended input common-mode range, and ultra-low quiescent current in miniature packages.
FAQ
What is the operating temperature range for the LMX358AUA-T?
The LMX358AUA-T is specified for continuous operation from −40°C to +125°C. This extended industrial temperature range ensures reliable performance in battery-powered handheld devices exposed to ambient extremes, such as outdoor wearables or automotive cabin sensors. All electrical parameters in the datasheet - including input offset voltage, supply current, and output swing - are guaranteed across this full range.
Does the LMX358AUA-T support single-supply operation?
Yes, the LMX358AUA-T fully supports single-supply operation with VEE tied to ground. Its input common-mode voltage range extends to VEE − 0.2V (i.e., −0.2V), allowing direct connection of ground-referenced sources, and its rail-to-rail output swings within 40mV of both supply rails - making it ideal for +2.3V to +7V single-rail systems like those powered by Li-ion or alkaline batteries.
What package type is used for the LMX358AUA-T?
The LMX358AUA-T uses the 8-pin µMAX® package (also known as uSOP), measuring 3mm × 3mm with 0.65mm lead pitch. This compact outline provides 40% smaller footprint than standard SO-8 and superior thermal resistance compared to SOT23-8, enabling high-density layouts in space-constrained portable electronics without sacrificing thermal performance.
Can the LMX358AUA-T drive capacitive loads without instability?
Yes, the LMX358AUA-T is unity-gain stable with capacitive loads up to 400pF, as verified in the datasheet's Typical Operating Characteristics (Figure 20–21). This capability eliminates the need for series isolation resistors when driving ADC input capacitance, long PCB traces, or small bypass caps - simplifying layout and preserving signal fidelity in high-frequency sensor interfaces.
How does the LMX358AUA-T compare to the LMV358 in terms of input voltage range?
The LMX358AUA-T offers a significantly wider input common-mode voltage range than the LMV358: VEE − 0.2V to VCC − 0.8V versus VEE + 0.2V to VCC − 1.2V. This −0.2V extension below ground enables direct interfacing with ground-referenced transducers (e.g., strain gauges, thermocouples) without external level-shifting circuitry - a key differentiator confirmed in the LMX358AUA-T's Absolute Maximum Ratings and Electrical Characteristics tables.
LMX358AUA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 1V/µs
- Gain Bandwidth Product:
- 1.3 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 18 nA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 240µA (x2 Channels)
- Current - Output / Channel:
- 28 mA
- Voltage - Supply Span (Min):
- 2.3 V
- Voltage - Supply Span (Max):
- 7 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-uMAX/uSOP
LMX358AUA-T FAQ
1.How can I place an order for LMX358AUA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for LMX358AUA-T 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 LMX358AUA-T reliable?
The price and inventory of LMX358AUA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMX358AUA-T is usually 5 days.
3.What payment methods are accepted for LMX358AUA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMX358AUA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMX358AUA-T?
LMX358AUA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMX358AUA-T 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 LMX358AUA-T?
For technical support, including LMX358AUA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMX358AUA-T requirements.
6.How does Aetrix verify that LMX358AUA-T is sourced from the original manufacturer or authorized distributors?
All LMX358AUA-T 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 LMX358AUA-T meets industry standards.
7.What is the process for return or replacement of LMX358AUA-T?
All LMX358AUA-T units undergo pre-shipment inspection (PSI). If there is an issue with LMX358AUA-T, 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 LMX358AUA-T part is unused and in its original packaging.
Return procedure for LMX358AUA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMX358AUA-T Tags
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LM358DT
STMicroelectronics
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LM358DR
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LM2904DR
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LM358ADR
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LM2904DGKR
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LM324DR
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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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