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Analog Devices Inc./Maxim Integrated MAX4493ASA
- Part No.:
- MAX4493ASA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4493ASA.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,174
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Product details
Overview
The MAX4493ASA from Maxim Integrated is a single-channel, rail-to-rail output operational amplifier designed for low-power, dual-supply systems operating from ±2.25V to ±5.5V or single +4.5V to +11V. It delivers 5MHz gain-bandwidth, 770µA quiescent current per amplifier, and output swing within 10mV of either rail (RL = 100kΩ), making it suitable for precision signal conditioning in battery-powered industrial sensors.
For engineers reviewing the MAX4493ASA datasheet, MAX4493ASA pinout, MAX4493ASA application, or MAX4493ASA equivalent, key selection criteria include its automotive-grade temperature range (–40°C to +125°C), 110dB open-loop gain, rail-to-rail input voltage range extending 200mV below VEE, and SC70/SOT23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX4493ASA uses a bipolar process and features unity-gain stability with no phase reversal under overdriven inputs. Its input stage supports common-mode voltages from VEE – 0.2V to VCC – 1.5V, while the output stage achieves rail-to-rail swing with <10mV headroom at high impedance loads.
AC performance includes 3V/µs slew rate, 190kHz full-power bandwidth (5VP-P), and 0.002% THD+N at 1kHz - enabled by high PSRR (80dB) and CMRR (90dB) across the automotive temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | ±2.25V to ±5.5V dual or +4.5V to +11V single - enables direct interface with 5V/±5V and 3.3V logic systems |
| Quiescent Current | 770µA per amplifier - supports >10-year battery life in always-on sensor nodes |
| Gain-Bandwidth Product | 5MHz - sufficient for anti-aliasing filters up to ~500kHz and DAC reconstruction stages |
| Input Common-Mode Range | VEE – 0.2V to VCC – 1.5V - allows direct sensing of signals near negative rail without level-shifting |
| Output Swing (RL = 100kΩ) | Within 10mV of rails - preserves dynamic range in low-voltage ADC driver applications |
| Open-Loop Gain | 110dB (RL = 100kΩ) - ensures <100µV error in unity-gain buffer configurations |
| THD+N | 0.002% at 1kHz, 5VP-P - meets audio-grade line-driver and precision instrumentation requirements |
Pinout & Package
The MAX4493ASA is housed in an 8-pin SO (Small Outline) package, distinct from the 5-pin SC70 variant (MAX4493AXK+T). This SO package provides improved thermal dissipation and mechanical robustness for automotive under-hood applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier output | Delivers rail-to-rail voltage swing; requires no external pull-up/down for analog signal routing |
| 2 (IN–) | Inverting input | Accepts feedback network connection; high-impedance node sensitive to PCB trace capacitance |
| 3 (IN+) | Noninverting input | Connects to reference or sensor signal; supports common-mode range down to VEE – 0.2V |
| 4 (VEE) | Negative supply | Bipolar operation reference; must be bypassed with 0.1µF capacitor to ground per layout guidelines |
| 5 (VCC) | Positive supply | Dual-supply rail; bypassing with 0.1µF capacitor minimizes PSRR degradation at high frequencies |
| 6–8 | No connect (NC) | Unused pins; left unconnected per datasheet - no internal tie or test function |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Enables full utilization of ADC input range in single-supply data acquisition systems |
| No phase reversal on overdrive | Prevents latch-up or system instability when input transients exceed common-mode limits |
| Unity-gain stable | Eliminates need for external compensation components in buffer and gain-of-one configurations |
| Automotive temperature rating | Validated operation from –40°C to +125°C supports engine control unit (ECU) and ADAS sensor front-ends |
| Low THD+N (0.002%) | Preserves signal fidelity in audio line drivers and high-resolution DAC output amplification |
Applications
| Battery-Powered Sensor Nodes | DAC Output Amplification |
|---|---|
|
Use Scenario: Low-power temperature/humidity sensor with microcontroller-based ADC sampling at 1ksps. IC Role / Device Role / Timing Role: Signal-conditioning amplifier buffering thermistor bridge output before 12-bit SAR ADC. Use Value: 770µA quiescent current extends coin-cell lifetime beyond 5 years; rail-to-rail output maximizes SNR at 3.3V supply. |
Use Scenario: Industrial PLC analog output module generating 0–10V control signals from 16-bit DAC. IC Role / Device Role / Timing Role: Precision output driver with low THD+N ensuring accurate voltage setpoints. Use Value: 0.002% THD+N and 110dB open-loop gain maintain <0.01% total unadjusted error across temperature. |
| Industrial Voltage Reference Buffer | Signal Conditioning for Automotive Sensors |
|
Use Scenario: Buffered 2.5V bandgap reference feeding multiple ADCs and comparators in motor drive controller. IC Role / Device Role / Timing Role: Low-drift, high-PSRR buffer isolating reference from load variations. Use Value: 3µV/°C offset drift and 80dB PSRR suppress supply noise coupling into precision reference path. |
Use Scenario: Front-end amplifier for piezoresistive pressure sensor in brake-by-wire system. IC Role / Device Role / Timing Role: High-CMRR instrumentation amplifier stage rejecting common-mode noise in noisy chassis environment. Use Value: 90dB CMRR and –40°C to +125°C qualification ensure reliable operation despite EMI and thermal cycling. |
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 |
|---|---|---|---|
| MAX4490ASA+ | Lower 500µA quiescent current but reduced 2.5MHz GBW and 2.5V/µs slew rate | Better suited for ultra-low-power wake-up circuits where bandwidth <3MHz is acceptable | Select MAX4490ASA+ only when supply current is primary constraint and 5MHz GBW is not required |
| TSV911IDT | CMOS input (0.1pA IB), wider 8MHz GBW, but only rated to +105°C and lacks automotive qualification | Preferred for high-impedance sensor interfaces (e.g., pH electrodes) where bias current dominates error | Choose TSV911IDT for non-automotive, high-Z applications needing higher speed and lower input bias |
Compared with MAX4493ASA, MAX4490ASA+ trades bandwidth for lower power, while TSV911IDT offers superior input specs and speed but lacks AEC-Q100 qualification and extended temperature support - making MAX4493ASA the only option qualified for under-hood automotive use with balanced GBW, noise, and rail-to-rail output.
Availability
MAX4493ASA is available at Aetrix Electronics and suitable for battery-powered systems, DAC output amplification, and industrial control systems requiring stable component supply across automotive and industrial temperature ranges.
Supply support for MAX4493ASA 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 and mixed-signal ICs for industrial, automotive, and communications infrastructure markets.
The MAX4493 family targets low-power, rail-to-rail op amp applications in space-constrained, wide-temperature environments - emphasizing quiescent current efficiency without sacrificing AC performance or DC precision.
FAQ
What is the maximum capacitive load the MAX4493ASA can drive without external compensation?
The MAX4493ASA is stable driving up to 300pF capacitive load in unity-gain configuration, as verified in the Capacitive-Load Stability graph (Figure MAX4493-26). For loads exceeding 300pF, a series isolation resistor (e.g., 15Ω) between the output and load restores stability, though with minor overshoot. This capability makes MAX4493ASA suitable for driving ADC input capacitors and long PCB traces without added complexity.
Does the MAX4493ASA support single-supply operation, and what is the minimum recommended supply voltage?
Yes, the MAX4493ASA operates from a single supply of +4.5V to +11V. The minimum recommended single-supply voltage is +4.5V, which corresponds to ±2.25V dual-supply operation. At this voltage, the device maintains full rail-to-rail output swing and specified AC performance including 5MHz GBW and 0.002% THD+N - critical for low-voltage portable instrumentation.
How does the input voltage range of the MAX4493ASA compare to standard op amps, and why does it matter?
The MAX4493ASA input common-mode range extends from VEE – 0.2V to VCC – 1.5V, enabling operation with inputs 200mV below the negative rail. Unlike standard op amps that clip near the rails, this feature allows direct interfacing with ground-referenced sensors (e.g., thermocouples, current shunts) without level-shifting circuitry - reducing component count and offset errors in precision measurement paths.
Is the MAX4493ASA pin-compatible with other devices in the MAX449x family?
No - the MAX4493ASA (8-pin SO) is not pin-compatible with the single-channel MAX4493AXK+T (5-pin SC70) or MAX4493AUK+T (5-pin SOT23). Pin compatibility exists only within same-package variants: e.g., MAX4494AKA+T (8-pin SOT23) shares pinout with MAX4494ASA+ (8-pin SO) for dual-channel versions. Always verify package-specific pin configurations before board layout.
What thermal considerations apply to the MAX4493ASA in its 8-pin SO package?
The 8-pin SO package has a thermal resistance θJA of 5.9mW/°C above +70°C, allowing 471mW continuous power dissipation at +70°C ambient. In automotive applications at +125°C case temperature, derating reduces usable power to ~150mW. Proper PCB copper pour under the exposed pad (if present) and thermal vias significantly improve heat transfer - essential for sustained operation in engine control modules.
MAX4493ASA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- 8-SOIC
MAX4493ASA FAQ
1.How can I place an order for MAX4493ASA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4493ASA 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 MAX4493ASA reliable?
The price and inventory of MAX4493ASA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4493ASA is usually 5 days.
3.What payment methods are accepted for MAX4493ASA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4493ASA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4493ASA?
MAX4493ASA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4493ASA 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 MAX4493ASA?
For technical support, including MAX4493ASA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4493ASA requirements.
6.How does Aetrix verify that MAX4493ASA is sourced from the original manufacturer or authorized distributors?
All MAX4493ASA 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 MAX4493ASA meets industry standards.
7.What is the process for return or replacement of MAX4493ASA?
All MAX4493ASA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4493ASA, 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 MAX4493ASA part is unused and in its original packaging.
Return procedure for MAX4493ASA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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