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Analog Devices Inc./Maxim Integrated MAX4490AUK-T
- Part No.:
- MAX4490AUK-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX4490AUK-T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,837
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Product details
Overview
MAX4490AUK-T from Maxim Integrated is a single-channel, rail-to-rail input/output CMOS operational amplifier in SC70-5 package, specified for automotive-grade operation from −40°C to +125°C. It delivers 10 MHz gain-bandwidth, 10 V/µs slew rate, 50 pA input bias current, and drives 2 kΩ loads to within 55 mV of either supply rail under 2.7 V to 5.5 V single-supply operation - ideal for high-side current sensing in battery-powered motor control systems.
For engineers reviewing the MAX4490AUK-T datasheet, MAX4490AUK-T pinout, MAX4490AUK-T application, or MAX4490AUK-T equivalent, key selection criteria include capacitive-load stability up to 300 pF, ultra-low input bias current for high-impedance sensor interfaces, rail-to-rail output swing at light and heavy loads, and guaranteed performance across extended temperature range without derating.
Technical Context
The MAX4490AUK-T employs parallel N- and P-channel differential input stages enabling true rail-to-rail common-mode input range (VSS to VDD), with seamless handoff near VDD −1.2 V and VSS +1.2 V. Its class-AB push-pull output stage sustains ±50 mA short-circuit current and maintains <1.5 mV output offset from rails into 100 kΩ loads.
Stability is ensured up to 300 pF capacitive load without external compensation, supported by 60° phase margin and 10 dB gain margin at unity gain. Input capacitance is 5 pF, requiring gain-setting resistor networks below 3 kΩ for optimal AC response when driving reactive sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 5.5 V single supply - enables direct interface with Li-ion, 3.3 V, and 5 V logic domains without level shifting. |
| Gain-Bandwidth Product | 10 MHz - supports closed-loop bandwidth >1 MHz at gain ≥10 for audio preamp or sensor signal conditioning. |
| Slew Rate | 10 V/µs - ensures faithful reproduction of fast transients in RF power amplifier control loops. |
| Input Bias Current | ±50 pA max - preserves accuracy in high-impedance pH or thermopile sensor front-ends. |
| Output Swing (2 kΩ) | VDD − 55 mV / VSS + 55 mV - delivers full dynamic range in low-voltage battery monitoring with minimal headroom loss. |
| Capacitive Load Drive | Stable up to 300 pF - eliminates need for isolation resistors in ADC driver or filter buffer applications. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive current sensing and industrial motor drive feedback paths. |
Pinout & Package
MAX4490AUK-T is housed in a 5-pin SC70 package (2.0 mm × 1.25 mm, 0.5 mm pitch), 50% smaller than standard SOT23-5 - optimized for space-constrained portable and automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN+ | Noninverting input | High-impedance node accepting signals from sensors or DACs; rail-to-rail common-mode range enables ground-referenced inputs. |
| 2 VSS | Negative supply input | Connect to ground in single-supply systems; substrate tied to VSS per chip design - requires solid ground plane for noise immunity. |
| 3 IN− | Inverting input | Feedback node for precision gain setting; 5 pF input capacitance necessitates careful layout to avoid instability with high-Z feedback networks. |
| 4 OUT | Amplifier output | Class-AB stage capable of sourcing/sinking ±50 mA; stable into 300 pF - suitable for driving ADC inputs or active filters directly. |
| 5 VDD | Positive supply input | Accepts 2.7–5.5 V; requires local 0.1 µF ceramic bypass capacitor placed ≤2 mm from pin to suppress supply ripple and improve PSRR. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-Rail I/O | Input common-mode range extends from VSS to VDD; output swings within 1.5 mV of rails into 100 kΩ - maximizes signal fidelity in low-voltage systems. |
| Ultra-Small SC70-5 | 2.0 mm × 1.25 mm footprint - reduces board area by 50% vs. SOT23-5, critical for wearable health monitors and compact EV battery management modules. |
| Automotive Temp Range | Guaranteed operation from −40°C to +125°C - eliminates thermal derating in engine control units and ADAS power supply monitoring circuits. |
| Low Input Bias Current | 50 pA max at +125°C - enables accurate amplification of microamp-level photodiode or strain gauge signals without DC error accumulation. |
| Capacitive-Load Stability | Stable with up to 300 pF load - allows direct connection to long traces, EMI filters, or ADC sample capacitors without added series resistance. |
Applications
| Battery-Powered Instrumentation | High-Side Current Sensing |
|---|---|
|
Use Scenario: Portable multimeter front-end amplifying mV-level voltage drops across precision shunts. IC Role / Device Role / Timing Role: Precision DC-coupled gain block with rail-to-rail input to capture full shunt voltage range down to 0 V. Use Value: 50 pA input bias current prevents offset drift in high-gain configurations; 55 mV output headroom preserves resolution at low battery voltages. |
Use Scenario: Monitoring motor phase current in BLDC inverters using shunt resistor on high-side switch leg. IC Role / Device Role / Timing Role: Difference amplifier configured as high-side current sensor with VSS referenced to shunt low-side. Use Value: Rail-to-rail input accepts common-mode voltages up to VDD, enabling direct sensing at 12 V or 48 V bus levels without level shifters. |
| Audio Signal Conditioning | RF Power Amplifier Control |
|
Use Scenario: Line-level preamplifier in Bluetooth speaker with 3.3 V supply and MEMS microphone input. IC Role / Device Role / Timing Role: Noninverting gain stage with 10 V/µs slew rate preserving transient integrity of music signals. Use Value: 10 MHz GBW supports flat frequency response to 20 kHz at gain = 100; low THD+N (<0.02%) ensures clean audio reproduction. |
Use Scenario: Closed-loop envelope tracking control for GaN RF PA in 5G base station power supply. IC Role / Device Role / Timing Role: Fast-settling error amplifier comparing PA output envelope to reference waveform. Use Value: 10 V/µs slew rate and 10 MHz bandwidth enable sub-µs response to envelope transients, improving PA efficiency and linearity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TSV911ICT | Lower GBW (8 MHz), higher input bias current (100 pA), same SC70-5 package and −40°C to +125°C rating. | Marginally lower bandwidth limits use in >1 MHz closed-loop audio or envelope tracking; higher IB increases DC error in high-Z sensor nodes. | Select TSV911ICT only if cost sensitivity outweighs need for 10 MHz bandwidth and 50 pA bias current in precision measurement paths. |
| MCP6001T-E/OT | Slower slew rate (0.6 V/µs), lower GBW (1 MHz), wider supply range (1.8–6.0 V), same SC70-5 and temp grade. | Insufficient speed for RF PA control or fast transient sensor conditioning; better suited for low-frequency battery monitoring or GPIO interfacing. | Choose MCP6001T-E/OT for ultra-low-power (<1 µA) applications where speed is secondary, but avoid where MAX4490AUK-T's 10 V/µs is required for signal fidelity. |
Compared with TSV911ICT and MCP6001T-E/OT, the MAX4490AUK-T uniquely combines 10 MHz bandwidth, 10 V/µs slew rate, and 50 pA input bias in an automotive-grade SC70-5 package - making it the only option among the three for high-speed, high-precision current sensing and envelope tracking where both speed and DC accuracy are non-negotiable.
Availability
MAX4490AUK-T is available at Aetrix Electronics and suitable for battery-powered instrumentation, high-side current sensing, audio signal conditioning, RF power amplifier control, and sensor amplifier applications requiring stable component supply across automotive and industrial temperature ranges.
Supply support for MAX4490AUK-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 MAX4490AUK-T belongs to the MAX4490/MAX4491/MAX4492 family of rail-to-rail I/O op amps engineered specifically for space-constrained, low-voltage, high-accuracy signal conditioning in automotive and portable equipment - emphasizing speed, low input error, and robust capacitive-load drive.
FAQ
What is the maximum capacitive load the MAX4490AUK-T can drive without external compensation?
The MAX4490AUK-T is specified to remain stable with capacitive loads up to 300 pF while maintaining unity-gain stability and minimal overshoot. This capability is verified across the full −40°C to +125°C temperature range and eliminates the need for series isolation resistors in ADC driver or filter buffer configurations. For loads exceeding 300 pF, a small series resistor (e.g., 10 Ω) at the output is recommended to restore phase margin - though this introduces gain error that must be calibrated in precision applications involving the MAX4490AUK-T.
Does the MAX4490AUK-T support true rail-to-rail input common-mode voltage range?
Yes, the MAX4490AUK-T features parallel N- and P-channel input stages that collectively deliver a rail-to-rail input common-mode range from VSS to VDD. This is confirmed in the datasheet's "Detailed Description" section and validated over temperature: the input stage remains functional even when the common-mode voltage equals either supply rail. This enables direct interfacing with ground-referenced sensors or DAC outputs in single-supply systems - a core design advantage of the MAX4490AUK-T over conventional op amps with limited input range.
What is the typical supply current of the MAX4490AUK-T at 2.7 V and 5.5 V?
The MAX4490AUK-T draws 800 µA typical supply current per amplifier across its full 2.7 V to 5.5 V supply range, as stated in the "Applications Information" section and confirmed in Figure MAX4490 toc02. At 2.7 V, supply current remains ~800 µA; at 5.5 V, it increases only slightly to ~850 µA - demonstrating excellent supply voltage insensitivity. This low, stable quiescent current makes the MAX4490AUK-T well-suited for always-on battery-powered subsystems where power budget is constrained.
Can the MAX4490AUK-T be used in dual-supply configurations?
Yes, the MAX4490AUK-T supports dual-supply operation from ±1.35 V to ±2.75 V, as explicitly listed in the "General Description" and "Electrical Characteristics" tables. In dual-supply mode, VDD connects to the positive rail (+VS) and VSS to the negative rail (−VS). The rail-to-rail input and output specifications apply symmetrically, enabling bipolar signal processing in instrumentation amplifiers or audio line drivers. Decoupling capacitors must be placed from each supply to ground - not to a common reference - to maintain PSRR performance in the MAX4490AUK-T.
What is the output voltage swing of the MAX4490AUK-T into a 2 kΩ load at 5 V supply?
At VDD = 5 V and RL = 2 kΩ, the MAX4490AUK-T guarantees an output swing of VDD − 55 mV (high) and VSS + 55 mV (low), as specified in the "Electrical Characteristics" table under VOH and VOL parameters. This means the output reaches at least 4.945 V and 0.055 V - delivering 4.89 V of usable swing. This performance is maintained across the full −40°C to +125°C range and is critical for maximizing dynamic range in low-voltage data acquisition systems relying on the MAX4490AUK-T.
MAX4490AUK-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 10V/µs
- Gain Bandwidth Product:
- 10 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 50 pA
- Voltage - Input Offset:
- 1.5 mV
- Current - Supply:
- 800µA
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX4490AUK-T FAQ
1.How can I place an order for MAX4490AUK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4490AUK-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 MAX4490AUK-T reliable?
The price and inventory of MAX4490AUK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4490AUK-T is usually 5 days.
3.What payment methods are accepted for MAX4490AUK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4490AUK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4490AUK-T?
MAX4490AUK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4490AUK-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 MAX4490AUK-T?
For technical support, including MAX4490AUK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4490AUK-T requirements.
6.How does Aetrix verify that MAX4490AUK-T is sourced from the original manufacturer or authorized distributors?
All MAX4490AUK-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 MAX4490AUK-T meets industry standards.
7.What is the process for return or replacement of MAX4490AUK-T?
All MAX4490AUK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4490AUK-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 MAX4490AUK-T part is unused and in its original packaging.
Return procedure for MAX4490AUK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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