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Analog Devices Inc./Maxim Integrated MAX4493AXK
- Part No.:
- MAX4493AXK
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX4493AXK.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:653
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Product details
Overview
MAX4493AXK from Maxim Integrated is a single-channel, rail-to-rail output operational amplifier designed for low-power, dual-supply signal conditioning in automotive and industrial systems. It delivers 5MHz gain-bandwidth, 770µA quiescent current per amplifier, and operates from ±2.25V to ±5.5V supplies while supporting input common-mode range extending 200mV below VEE and output swing within 10mV of either rail (RL = 100kΩ). It is used in DAC output amplification and voltage reference generation.
For engineers reviewing the MAX4493AXK datasheet, MAX4493AXK pinout, MAX4493AXK application, or MAX4493AXK equivalent, key selection criteria include its automotive-grade temperature range (–40°C to +125°C), SC70-5 package footprint, rail-to-rail output capability, low THD+N (0.002% at 1kHz), and unity-gain stability without external compensation.
Technical Context
The MAX4493AXK employs a bipolar process and features an input stage with extended common-mode range (VEE – 0.2V to VCC – 1.5V) and no phase reversal under overdrive. Its output stage is optimized for rail-to-rail swing into high-impedance loads (≤100kΩ), delivering 110dB open-loop gain and 8nV/√Hz input voltage noise density at 1kHz.
It achieves stable operation with capacitive loads up to 300pF in unity-gain configuration and supports full-power bandwidth of 190kHz (5VP-P output). Power-up settling occurs within 3µs, and it maintains 75° phase margin and 15dB gain margin across operating conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 5MHz - enables stable unity-gain operation and supports signal amplification up to audio frequencies with minimal phase lag. |
| Quiescent Supply Current | 770µA per amplifier - allows battery-powered operation for >1 year in low-duty-cycle sensor interfaces. |
| Input Common-Mode Range | VEE – 0.2V to VCC – 1.5V - accommodates ground-referenced inputs and wide-swing sensor outputs in dual-supply systems. |
| Rail-to-Rail Output Swing | Within 10mV of rails (RL = 100kΩ) - maximizes dynamic range for ADC drivers and precision reference buffers. |
| Open-Loop Gain | 110dB (RL = 100kΩ) - ensures <0.01% gain error in closed-loop configurations with gains ≤100V/V. |
| THD+N | 0.002% at 1kHz - meets high-fidelity signal chain requirements for DAC output buffering and audio pre-amplification. |
| Slew Rate | 3V/µs - supports clean 5VP-P output at 190kHz full-power bandwidth without slewing distortion. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial control environments. |
Pinout & Package
The MAX4493AXK is housed in a 5-pin SC70 package (package code X5-1), measuring 2.0mm × 1.25mm × 0.9mm with 0.65mm lead pitch. This ultra-small outline supports high-density PCB layouts in space-constrained modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN+) | Noninverting Input | High-impedance node (110MΩ common-mode, 250kΩ differential) accepting signals down to VEE – 0.2V. |
| 2 (VEE) | Negative Supply | Reference for internal biasing; must be bypassed with 0.1µF capacitor to ground for PSRR optimization. |
| 3 (IN–) | Inverting Input | Differential input terminal; matched to IN+ for <1mV channel offset in multi-amp systems. |
| 4 (VCC) | Positive Supply | Primary power rail; requires local 0.1µF decoupling to minimize supply-induced noise coupling. |
| 5 (OUT) | Output | Class-AB rail-to-rail stage capable of sourcing/sinking 15mA and driving 100kΩ loads to within 10mV of rails. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal on overdriven inputs | Prevents latch-up and signal corruption when input exceeds common-mode limits-critical for fault-tolerant sensor interfaces. |
| Unity-gain stable | Operates without external compensation components, reducing BOM count and layout area in gain-of-one applications. |
| Low THD+N (0.002% @ 1kHz) | Preserves signal integrity in precision DAC output stages and audio signal paths where harmonic distortion degrades SNR. |
| Extended input voltage range | Supports direct connection to ground-referenced sources (e.g., resistive sensors, thermocouples) without level-shifting circuitry. |
| Automotive temperature rating | Validated for continuous operation from –40°C to +125°C-meets AEC-Q100 stress test requirements for automotive electronics. |
| Capacitive-load stability (300pF) | Drives long traces or ADC input capacitance directly without isolation resistors, simplifying filter design in data acquisition systems. |
Applications
| Battery-Powered Sensor Interface | DAC Output Amplifier |
|---|---|
Use Scenario: Low-power analog front-end for MEMS accelerometers or pressure sensors in portable diagnostic tools. IC Role / Device Role / Timing Role: Signal conditioning amplifier providing gain, offset correction, and rail-to-rail drive into SAR ADC inputs. Use Value: 770µA supply current extends battery life; rail-to-rail output ensures full utilization of 12-bit ADC input range. | Use Scenario: Buffering the output of a 16-bit DAC in programmable power supply control loops. IC Role / Device Role / Timing Role: Precision voltage follower minimizing code-dependent gain error and thermal drift. Use Value: 110dB open-loop gain and 0.002% THD+N preserve DAC linearity and spectral purity in closed-loop regulation. |
| Voltage Reference Generator | Industrial Control Signal Conditioning |
Use Scenario: Generating stable, low-noise reference voltages for analog comparators and multiplexed sensor excitation. IC Role / Device Role / Timing Role: Unity-gain buffer isolating precision shunt references (e.g., REF5025) from load variations. Use Value: 8nV/√Hz input voltage noise and 3µV/°C offset drift maintain reference accuracy across temperature extremes. | Use Scenario: Amplifying 4–20mA loop receiver outputs in PLC analog input modules. IC Role / Device Role / Timing Role: Single-supply compatible amplifier converting current-loop signals to ground-referenced voltage with high CMRR. Use Value: 90dB CMRR and 80dB PSRR reject field noise and supply ripple in electrically noisy factory environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar general-purpose op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV321Q1M/NOPB | CMOS input (0.5pA IB), lower supply current (65µA), but only 1MHz GBW and 1V/µs slew rate. | Preferred for ultra-low-power microcontroller I/O buffering; unsuitable for 5VP-P 190kHz full-power operation. | Select when sub-100µA quiescent current dominates over bandwidth and output drive. |
| TSV911ILT | Higher GBW (8MHz), rail-to-rail I/O, but only rated to +105°C and lacks automotive qualification. | Used in consumer-grade instrumentation; not approved for automotive under-hood deployment. | Choose for cost-sensitive non-automotive designs requiring higher speed and dual rail-to-rail capability. |
Compared with LMV321Q1M/NOPB and TSV911ILT, the MAX4493AXK uniquely combines automotive temperature rating, 5MHz bandwidth, rail-to-rail output, and 770µA supply current in a 5-pin SC70 package-making it optimal for space-constrained, high-reliability industrial and automotive signal chains where performance and qualification are jointly critical.
Availability
MAX4493AXK is available at Aetrix Electronics and suitable for battery-powered systems, DAC output amplification, and industrial control systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX4493AXK 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 MAX4493AXK belongs to the MAX4493/MAX4494/MAX4495 family of low-power, rail-to-rail op amps engineered for dual-supply signal conditioning in automotive-qualified systems where size, power, and precision are co-constrained.
FAQ
What is the maximum capacitive load the MAX4493AXK can drive without external compensation?
The MAX4493AXK is stable driving capacitive loads up to 300pF in unity-gain configuration, as verified by phase margin testing. For larger loads (e.g., >500pF), an isolation resistor (RISO ≥ 15Ω) must be added in series with the output to prevent oscillation-this is documented in Figure 1 of the MAX4493AXK datasheet. The device's internal compensation eliminates need for external components under standard conditions.
Does the MAX4493AXK support single-supply operation?
Yes, the MAX4493AXK operates from a single supply of +4.5V to +11V, in addition to dual supplies of ±2.25V to ±5.5V. Its input common-mode range extends 200mV below the negative rail (which may be ground in single-supply use), and its rail-to-rail output swings within 10mV of both supply rails-enabling true ground-sensing and full-scale output in single-ended systems.
What is the meaning of the "/V" suffix in MAX4493AXK/V+T?
The "/V" suffix in MAX4493AXK/V+T explicitly denotes automotive qualification per AEC-Q100 standards, including extended temperature operation (–40°C to +125°C), enhanced reliability testing, and controlled manufacturing flow. This distinguishes it from commercial-grade variants like MAX4493AXK+T and confirms suitability for safety-critical vehicle subsystems such as body control modules and ADAS sensor interfaces.
How does the MAX4493AXK's input offset voltage drift compare to typical precision op amps?
The MAX4493AXK has a guaranteed input offset voltage drift of 3µV/°C over –40°C to +125°C, which is competitive with many precision bipolar op amps. While chopper-stabilized amplifiers offer lower drift (<0.05µV/°C), the MAX4493AXK achieves this performance without switching noise or 1/f noise degradation-making it preferable for medium-precision, low-noise applications like reference buffering where spectral purity matters more than ultra-low drift.
Is the MAX4493AXK pin-compatible with other op amps in the same SC70-5 package?
No, the MAX4493AXK uses a proprietary pinout (IN+, VEE, IN–, VCC, OUT) that differs from industry-standard SC70-5 op amps such as the OPA314 or MCP6001. Substituting without layout revision risks incorrect supply polarity or signal routing. Always verify pin mapping using the MAX4493AXK top-view diagram (Rev 3, 12/09) before board reuse or cross-replacement.
MAX4493AXK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 3V/µs
- Gain Bandwidth Product:
- 5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 200 nA
- Voltage - Input Offset:
- 300 µV
- Current - Supply:
- 770µA
- Current - Output / Channel:
- 15 mA
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 11 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
MAX4493AXK FAQ
1.How can I place an order for MAX4493AXK through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4493AXK 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 MAX4493AXK reliable?
The price and inventory of MAX4493AXK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4493AXK is usually 5 days.
3.What payment methods are accepted for MAX4493AXK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4493AXK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4493AXK?
MAX4493AXK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4493AXK 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 MAX4493AXK?
For technical support, including MAX4493AXK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4493AXK requirements.
6.How does Aetrix verify that MAX4493AXK is sourced from the original manufacturer or authorized distributors?
All MAX4493AXK 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 MAX4493AXK meets industry standards.
7.What is the process for return or replacement of MAX4493AXK?
All MAX4493AXK units undergo pre-shipment inspection (PSI). If there is an issue with MAX4493AXK, 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 MAX4493AXK part is unused and in its original packaging.
Return procedure for MAX4493AXK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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