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Analog Devices Inc./Maxim Integrated LMX358AKA
- Part No.:
- LMX358AKA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8
- Datasheet:
-
LMX358AKA.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,255
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Product details
Overview
LMX358AKA 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 quiescent current (typical at +2.7V), delivers 1.3MHz gain-bandwidth product, and swings within 40mV of both rails into 2kΩ loads-enabling precision signal conditioning in portable audio and sensor front-ends.
For engineers reviewing the LMX358AKA datasheet, LMX358AKA pinout, LMX358AKA application, or LMX358AKA equivalent, this page provides verified electrical parameters, SOT23-8 package layout, real-world use cases in cellular handsets and active filters, and two validated alternative op amps with documented functional trade-offs.
Technical Context
The LMX358AKA integrates two independent bipolar-input op amp channels in a single 8-pin SOT23 package, each featuring rail-to-rail output swing and an input common-mode range extending 0.2V below ground (VEE − 0.2V) and up to 0.8V below VCC. Its unity-gain stable architecture supports capacitive loads up to 400pF without external compensation.
It exhibits no phase reversal under overdriven inputs and eliminates crossover distortion via complementary output stage design. Input bias current remains ≤50nA (typical at +25°C), and large-signal voltage gain exceeds 20V/mV into 2kΩ loads-supporting accurate DC-coupled amplification in low-power analog signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.3V to +7V single supply - enables direct integration into Li-ion (3.0–4.2V) and coin-cell (3V) powered devices without level-shifting. |
| Quiescent Current per Amplifier | 210µA typical at +2.7V - allows dual-channel operation with <450µA total system supply current, critical for multi-day battery life. |
| Gain-Bandwidth Product | 1.3MHz - supports stable unity-gain buffering and closed-loop gains up to ~10× at audio frequencies (≤130kHz). |
| Output Voltage Swing | Within 40mV of VCC and VEE into 2kΩ - preserves full dynamic range in 3.3V ADC interfaces and rail-referenced comparators. |
| Input Common-Mode Range | VEE − 0.2V to VCC − 0.8V - permits sensing signals below ground (e.g., transducer outputs) and high-side current monitoring near VCC. |
| CMRR / PSRR | 72dB / 82dB (min, +25°C) - rejects power supply ripple and common-mode noise in noisy embedded environments. |
| Slew Rate | 1V/µs - handles 1kHz sine waves at 2Vpp without distortion, suitable for audio preamps and anti-aliasing filters. |
Pinout & Package
LMX358AKA is housed in an 8-pin SOT23-8 package (JEDEC MO-178AA), measuring 2.95mm × 1.60mm × 1.10mm, with gull-wing leads and 0.65mm pitch. This compact outline supports high-density PCB layouts in space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT1 | Amplifier 1 output - drives resistive or moderate capacitive loads directly; requires local 0.1µF bypass to VEE for stability. |
| 2 | IN1− | Inverting input for Amp 1 - connects to feedback network; sensitive to stray capacitance; keep trace short and shielded. |
| 3 | IN1+ | Noninverting input for Amp 1 - accepts DC- or AC-coupled sensor signals; input protection diodes clamp >±1.8V differential. |
| 4 | VEE | Negative supply - tied to ground in single-supply mode; serves as reference for rail-to-rail output swing and input CM range. |
| 5 | VCC | Positive supply - must be decoupled with 0.1µF ceramic capacitor placed ≤2mm from pin to minimize supply-induced noise. |
| 6 | IN2+ | Noninverting input for Amp 2 - electrically isolated from Amp 1; usable for independent signal paths or dual-channel filtering. |
| 7 | IN2− | Inverting input for Amp 2 - supports standard inverting gain configurations; shares same input protection structure as Pin 3. |
| 8 | OUT2 | Amplifier 2 output - identical performance to OUT1; crosstalk rejection >80dB at 1kHz ensures channel independence. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full 0–VCC output range into 2kΩ, enabling maximum ADC utilization and eliminating level-shifting circuitry. |
| No phase reversal on overdrive | Prevents latch-up or erroneous logic transitions when inputs exceed common-mode limits-critical in comparator-like applications. |
| 1.3MHz GBW with 400pF load drive | Permits direct driving of ADC input capacitors and long traces without external isolation resistors or compensation networks. |
| Input CM range extends below ground | Supports true single-supply operation with bipolar input signals (e.g., bridge sensors, electret mic biasing) without external offset. |
| Low 210µA per amplifier supply current | Reduces thermal load and extends battery runtime in always-on sensor nodes and wearable health monitors. |
Applications
| Cellular Handset Audio | Portable Sensor Signal Chain |
|---|---|
Use Scenario: Amplifying microphone output and driving earpiece speaker in GSM/UMTS handsets with 3.3V supply. IC Role / Device Role / Timing Role: Dual-channel op amp providing microphone preamplification (Amp 1) and speaker driver buffer (Amp 2) in same footprint. Use Value: Rail-to-rail swing maximizes SNR into 16-bit audio ADC; 210µA per channel minimizes impact on standby current budget. |
Use Scenario: Conditioning thermistor, accelerometer, or ambient light sensor outputs before SAR ADC sampling. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier (Amp 1) and second-stage filter (Amp 2) in ultra-low-power IoT node. Use Value: Input CM range down to VEE − 0.2V allows direct connection to grounded-sensor bridges; 1.3MHz GBW supports 100Hz–10kHz bandwidths. |
| Active Low-Pass Filter | Low-Voltage Reference Buffer |
Use Scenario: Implementing 2nd-order Sallen-Key low-pass filter at 10kHz cutoff for ECG front-end or motor control feedback. IC Role / Device Role / Timing Role: Dual op amp configured as unity-gain buffer (Amp 1) and filter integrator (Amp 2) with shared VCC/VEE. Use Value: Unity-gain stability with 400pF capacitive loads eliminates need for isolation resistors; 1V/µs slew rate prevents step-response overshoot. |
Use Scenario: Buffering precision voltage reference (e.g., MAX6126) to multiple ADCs or DACs in 3.3V industrial data acquisition modules. IC Role / Device Role / Timing Role: High-impedance reference follower (Amp 1) and backup reference monitor (Amp 2) with rail-to-rail output compliance. Use Value: Output swing within 40mV of rails ensures reference integrity across full temperature range (−40°C to +125°C); CMRR ≥72dB suppresses supply noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual low-voltage op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV358IDR | Lower 1MHz GBW; 150µA IQ; same SOT23-8 package; input CM range limited to VEE to VCC − 1.2V. | Less suitable for 10kHz+ active filters or fast-settling sensor buffers; acceptable for DC-coupled gain stages with relaxed bandwidth. | Select LMV358IDR only if bandwidth <1MHz suffices and cost is primary constraint-LMX358AKA offers superior speed and rail-compatible inputs. |
| MCP6022-E/SN | Higher 10MHz GBW; 1mA IQ; SO-8 package; rail-to-rail input/output; CMOS input (1pA IB). | Better for high-impedance pH or photodiode sensors; excessive IQ disqualifies for sub-1mA battery systems. | Choose MCP6022-E/SN when input bias current <1pA is mandatory and power budget allows 2× higher supply current-LMX358AKA balances speed, power, and bipolar robustness. |
Compared with LMV358IDR, LMX358AKA delivers 30% higher bandwidth and extended input common-mode range below ground; versus MCP6022-E/SN, it cuts supply current by 80% while retaining sufficient GBW for audio and sensor conditioning-making it optimal for portable equipment where power and size are co-constrained.
Availability
LMX358AKA is available at Aetrix Electronics and suitable for cellular handsets, portable medical sensors, active filter modules, and low-voltage reference buffering requiring stable component supply across production lifecycles.
Supply support for LMX358AKA 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 industrial, automotive, and communications markets-with emphasis on high reliability and low-power innovation.
The LMX321/LMX358/LMX324 family was engineered specifically for battery-operated portable electronics, delivering rail-to-rail performance, ultra-low quiescent current, and small-footprint packaging without sacrificing stability or noise performance.
FAQ
What is the operating temperature range for the LMX358AKA?
The LMX358AKA is specified for continuous operation from −40°C to +125°C. Electrical characteristics-including input offset voltage (max 9mV), supply current (max 420µA), and output swing-are guaranteed across this full industrial temperature range, making LMX358AKA suitable for automotive cabin modules and outdoor IoT sensors.
Does the LMX358AKA support single-supply operation?
Yes, the LMX358AKA fully supports single-supply operation from +2.3V to +7V. Its input common-mode range extends 0.2V below VEE (ground), and its rail-to-rail output swings within 40mV of both supply rails into 2kΩ loads-enabling true single-rail functionality in 3.3V or 5V systems without external level shifters.
What package type is used for the LMX358AKA?
The LMX358AKA uses an 8-pin SOT23-8 package (JEDEC MO-178AA), with dimensions 2.95mm × 1.60mm × 1.10mm and 0.65mm lead pitch. This surface-mount outline is compatible with standard reflow profiles and supports automated assembly in high-volume portable electronics manufacturing.
Can the LMX358AKA drive capacitive loads?
Yes, the LMX358AKA is unity-gain stable and can directly drive capacitive loads up to 400pF without external compensation. For loads exceeding 400pF (e.g., ADC input capacitors), adding a 10–50Ω series resistor between the output and load restores phase margin-verified in Maxim's application note AN6132.
How does the LMX358AKA compare to the LMV358 family?
The LMX358AKA is a pin-to-pin compatible upgrade to the LMV358, offering identical SOT23-8 footprint but improved specs: 1.3MHz vs. 1MHz GBW, rail-to-rail output swing within 40mV (vs. 60mV), and extended input common-mode range down to VEE − 0.2V (vs. VEE only). These enhancements make LMX358AKA preferable for precision, low-voltage designs.
LMX358AKA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- SOT-23-8
LMX358AKA FAQ
1.How can I place an order for LMX358AKA through Aetrix?
Please submit a Request for Quotation (RFQ) for LMX358AKA 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 LMX358AKA reliable?
The price and inventory of LMX358AKA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMX358AKA is usually 5 days.
3.What payment methods are accepted for LMX358AKA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMX358AKA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMX358AKA?
LMX358AKA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMX358AKA 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 LMX358AKA?
For technical support, including LMX358AKA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMX358AKA requirements.
6.How does Aetrix verify that LMX358AKA is sourced from the original manufacturer or authorized distributors?
All LMX358AKA 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 LMX358AKA meets industry standards.
7.What is the process for return or replacement of LMX358AKA?
All LMX358AKA units undergo pre-shipment inspection (PSI). If there is an issue with LMX358AKA, 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 LMX358AKA part is unused and in its original packaging.
Return procedure for LMX358AKA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMX358AKA Tags
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LM358DT
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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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