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Analog Devices Inc./Maxim Integrated LMX358AKA-T
- Part No.:
- LMX358AKA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8
- Datasheet:
-
LMX358AKA-T.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,516
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Product details
Overview
LMX358AKA-T from Maxim Integrated is a dual, general-purpose, rail-to-rail output operational amplifier optimized for low-voltage, low-power applications. 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 drives 2kΩ loads within 40mV of both rails. It is used in portable battery-powered equipment requiring precision signal conditioning with minimal power consumption.
For engineers reviewing the LMX358AKA-T datasheet, LMX358AKA-T pinout, LMX358AKA-T application, or LMX358AKA-T equivalent, key selection criteria include its rail-to-rail output swing, input common-mode range extending 0.2V below ground, unity-gain stability with up to 400pF capacitive load drive, low 105µA per-amplifier supply current, and compatibility with space-constrained SOT23-8 layouts.
Technical Context
The LMX358AKA-T implements a bipolar-input, rail-to-rail output architecture with internal input protection circuitry including 3.5kΩ series resistors and back-to-back diode clamps. Its input common-mode voltage range spans VEE − 0.2V to VCC − 0.8V (at +2.7V supply), enabling operation with inputs below ground in single-supply configurations.
It features no phase reversal under overdriven input conditions and eliminates crossover distortion via complementary output stage design. The device is unity-gain stable and maintains ≥64° phase margin driving 200pF capacitive loads, supporting robust performance in active filters and sensor interface circuits without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.3V to +7V single supply - supports direct integration into 3.3V and 5V systems without level-shifting. |
| Quiescent Current | 210µA (typical, dual amp at +2.7V) - enables multi-channel signal conditioning in ultra-low-power portable designs. |
| Gain-Bandwidth Product | 1.3MHz - sufficient for DC–100kHz signal amplification in sensor front-ends and audio preamps. |
| Output Swing | Within 40mV of rails (RL = 2kΩ) - maximizes dynamic range in low-voltage ADC driver and reference buffer applications. |
| Input Common-Mode Range | VEE − 0.2V to VCC − 0.8V - allows input signals below ground in single-supply configurations, e.g., transducer outputs. |
| Capacitive Load Drive | Stable up to 400pF - permits direct connection to ADC input capacitance or long PCB traces without isolation resistor. |
| Input Offset Voltage | 1–6mV (25°C) - suitable for medium-precision instrumentation where trimming is not required. |
Pinout & Package
LMX358AKA-T is housed in an 8-pin SOT23-8 package (package code K8-2), measuring 2.95mm × 1.6mm × 1.1mm, with gull-wing leads and standard JEDEC MO-178AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT1 | Amplifier 1 output - rail-to-rail capable, drives 2kΩ load to within 40mV of VCC/VEE. |
| 2 | IN1− | Inverting input for Amp 1 - accepts signals down to VEE − 0.2V; protected by internal 3.5kΩ resistor and diode clamp. |
| 3 | IN1+ | Noninverting input for Amp 1 - same input structure as IN1−; differential input voltage clamped at ±3.1V. |
| 4 | VEE | Negative supply terminal - connect to ground in single-supply operation; defines lower rail for input/output swing. |
| 5 | VCC | Positive supply terminal - accepts +2.3V to +7V; requires local 0.1µF ceramic bypass capacitor. |
| 6 | IN2− | Inverting input for Amp 2 - electrically identical to IN1−; supports independent dual-channel configuration. |
| 7 | IN2+ | Noninverting input for Amp 2 - matches IN1+ characteristics; enables dual-sensor or dual-filter topologies. |
| 8 | OUT2 | Amplifier 2 output - fully independent of OUT1; shares same output drive capability and rail-to-rail behavior. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full-scale signal headroom at low supply voltages, preserving SNR in 3.3V ADC interfaces. |
| No phase reversal on overdrive | Prevents latch-up or erroneous control signals when inputs exceed common-mode limits - critical in closed-loop sensors. |
| Input common-mode range below ground | Supports bipolar signal acquisition (e.g., bridge sensors, thermocouples) without negative supply generation. |
| Unity-gain stable with 400pF load | Eliminates need for external isolation resistors in capacitive-load applications like anti-aliasing filter outputs. |
| Low 105µA per-amplifier quiescent current | Enables dual-channel amplification in always-on wearable devices with multi-day battery life. |
Applications
| Cellular Phones | Laptops |
|---|---|
Use Scenario: Amplifying microphone bias and audio line-level signals in slim form-factor handsets. IC Role / Device Role / Timing Role: Dual op amp providing low-noise preamplification and level-shifting for analog audio paths. Use Value: Rail-to-rail output ensures maximum utilization of 2.85V ADC input range; 210µA total supply current extends talk-time. | Use Scenario: Conditioning battery voltage monitoring and thermal sensor outputs in compact motherboard designs. IC Role / Device Role / Timing Role: Dual-channel signal conditioner for analog telemetry inputs feeding system management controllers. Use Value: Input range extending below ground accommodates offset thermistor bridges; small SOT23-8 footprint saves board area. |
| Active Filters | Portable/Battery-Powered Equipment |
Use Scenario: Implementing second-order low-pass and band-pass filters in handheld test instruments. IC Role / Device Role / Timing Role: Dual op amp configured as MFB or Sallen-Key topology stages with precise gain and cutoff control. Use Value: 1.3MHz GBW supports filter corner frequencies up to ~100kHz; unity-gain stability avoids peaking with PCB parasitics. | Use Scenario: Signal conditioning for glucose meters, pulse oximeters, and portable ECG front-ends. IC Role / Device Role / Timing Role: Dual amplifier handling transducer excitation and differential signal amplification in medical-grade analog chains. Use Value: No crossover distortion preserves waveform fidelity in biopotential measurements; low ICC extends disposable device shelf life. |
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 quiescent current (150µA per amp), wider input common-mode range (to VCC + 0.3V), but only 1MHz GBW. | Less suitable for high-speed filtering; better for rail-sensing applications requiring input above VCC. | Select LMV358IDR if input overvoltage tolerance > VCC is required; otherwise LMX358AKA-T offers superior speed/power trade-off. |
| TLV2372IDR | CMOS input (IB = 1pA vs. 18nA), lower noise (30nV/√Hz), but higher ICC (120µA per amp) and narrower VCM (to VCC − 1.5V). | Better for high-impedance pH or photodiode sensors; unsuitable for sub-ground input signals. | Choose TLV2372IDR for ultra-low input bias in precision sensor nodes; LMX358AKA-T preferred for mixed-signal systems needing ground-referenced inputs. |
Compared with LMV358IDR and TLV2372IDR, the LMX358AKA-T uniquely balances rail-to-rail output, sub-ground input capability, 1.3MHz bandwidth, and 210µA total supply current - making it optimal for dual-channel, battery-constrained systems requiring wide dynamic range and robust input handling.
Availability
LMX358AKA-T is available at Aetrix Electronics and suitable for cellular phones, laptops, active filters, and portable/battery-powered equipment requiring stable component supply across industrial temperature ranges (−40°C to +125°C).
Supply support for LMX358AKA-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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The LMX358AKA-T belongs to Maxim's LMX3xx family of low-voltage, rail-to-rail op amps designed specifically for portable and battery-operated systems where power efficiency, small size, and wide input/output voltage range are critical.
FAQ
What is the operating temperature range for the LMX358AKA-T?
The LMX358AKA-T is rated for continuous operation from −40°C to +125°C. This extended industrial temperature range is verified across all electrical specifications in the datasheet, including input offset voltage, supply current, and output swing, making it suitable for automotive cabin modules and outdoor portable equipment where ambient temperatures fluctuate widely.
Does the LMX358AKA-T support single-supply operation with inputs below ground?
Yes, the LMX358AKA-T supports true single-supply operation with inputs extending to VEE − 0.2V. When VEE is grounded, this allows input signals as low as −0.2V, enabling direct interfacing with transducers that produce negative-going outputs relative to system ground - a capability confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables.
What is the maximum capacitive load the LMX358AKA-T can drive while remaining stable?
The LMX358AKA-T is unity-gain stable driving capacitive loads up to 400pF, as explicitly stated in the General Description and verified in Typical Operating Characteristics (Figure MAXLMX toc23). Stability is maintained without external compensation, though for loads exceeding 400pF, a series isolation resistor (e.g., 10–100Ω) between output and capacitor is recommended per the Applications Information section.
Is the LMX358AKA-T pin-compatible with the LMV358 family?
Yes, the LMX358AKA-T is explicitly described as a pin-to-pin compatible upgrade to the LMV358 family. Both devices use identical 8-pin SOT23-8 pinouts (OUT1, IN1−, IN1+, VEE, VCC, IN2−, IN2+, OUT2), allowing drop-in replacement without PCB layout changes - a claim validated in the General Description and Pin Configurations diagrams of the datasheet.
What is the typical supply current for the LMX358AKA-T at +5V supply?
At +5V supply and +25°C, the LMX358AKA-T draws 240µA typical supply current (120µA per amplifier), as specified in the Electrical Characteristics table under "Supply Current (ICC)" with conditions VCC = +5V, TA = +25°C. This value increases to 420µA maximum across temperature and process variation, ensuring predictable power budgeting in dual-channel designs.
LMX358AKA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- 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:
- SOT-23-8
LMX358AKA-T FAQ
1.How can I place an order for LMX358AKA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for LMX358AKA-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 LMX358AKA-T reliable?
The price and inventory of LMX358AKA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMX358AKA-T is usually 5 days.
3.What payment methods are accepted for LMX358AKA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMX358AKA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMX358AKA-T?
LMX358AKA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMX358AKA-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 LMX358AKA-T?
For technical support, including LMX358AKA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMX358AKA-T requirements.
6.How does Aetrix verify that LMX358AKA-T is sourced from the original manufacturer or authorized distributors?
All LMX358AKA-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 LMX358AKA-T meets industry standards.
7.What is the process for return or replacement of LMX358AKA-T?
All LMX358AKA-T units undergo pre-shipment inspection (PSI). If there is an issue with LMX358AKA-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 LMX358AKA-T part is unused and in its original packaging.
Return procedure for LMX358AKA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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