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Analog Devices Inc./Maxim Integrated MAX4484AUK
- Part No.:
- MAX4484AUK
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX4484AUK.pdf
- Description:
- MAX4484 Single, Low-Cost, Single
- Quantity:
- Payment:
- Shipping:
Inventory:509
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Product details
Overview
MAX4484AUK from Maxim Integrated is a single-channel, rail-to-rail output operational amplifier designed for low-voltage, space-constrained signal conditioning. It operates from +2.7V to +5.5V, delivers 7MHz gain-bandwidth, drives 2kΩ loads with ≤50mV from rails, and remains stable with up to 100pF capacitive load - making it suitable for automotive sensor interfaces and portable instrument front-ends.
For engineers reviewing the MAX4484AUK datasheet, MAX4484AUK pinout, MAX4484AUK application, or MAX4484AUK equivalent, key selection criteria include its -40°C to +125°C operating range, ground-sensing inputs, no phase reversal on overdrive, 85dB open-loop gain at 2kΩ, and SOT23-5 package compatibility with high-density PCB layouts.
Technical Context
The MAX4484AUK employs a unity-gain stable voltage-feedback architecture optimized for single-supply operation. Its input stage supports common-mode voltages down to VSS (ground-sensing), while the rail-to-rail output stage uses complementary bipolar output transistors to achieve <50mV saturation at ±3.5mA load current.
Stability is ensured across temperature (-40°C to +125°C) and supply variation (+2.7V to +5.5V), with phase margin ≥55° and gain margin ≥12dB under unity-gain conditions. Capacitive-load tolerance up to 100pF is achieved without external compensation, enabling direct drive of ADC input filters or long traces in ECU modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.7V to +5.5V - enables direct interface with Li-ion battery systems and 3.3V/5V logic domains without level-shifting. |
| Gain-Bandwidth Product | 7MHz - supports closed-loop bandwidths >1MHz at moderate gains for fast sensor signal amplification. |
| Input Offset Voltage (max) | ±8.5mV over -40°C to +125°C - ensures sub-1% error in 12-bit sensor measurement paths with 2V full-scale range. |
| Output Swing (RL = 2kΩ) | Within 50mV of VDD and VSS - preserves dynamic range when driving SAR ADCs with 0–VDD input ranges. |
| Capacitive Load Stability | Up to 100pF - allows direct connection to 100nF bypass caps or long PCB traces without oscillation. |
| Supply Current per Amplifier | 4.0mA max over temperature - balances speed and power for always-on automotive subsystems. |
| Input Bias Current | ±100pA max - minimizes voltage error across high-impedance sensor bridges (e.g., thermopiles, RTDs). |
Pinout & Package
The MAX4484AUK is housed in a 5-pin SOT23-5 package (JEDEC MO-178AA), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads and 0.95mm pitch - compatible with standard reflow profiles and automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN+) | Noninverting Input | Accepts input signals referenced to ground; supports common-mode range from VSS to VDD – 1.4V. |
| 2 (IN−) | Inverting Input | Used for feedback and differential configurations; matched input capacitance (2pF) minimizes settling asymmetry. |
| 3 (OUT) | Amplifier Output | Rail-to-rail capable output delivering ±3.5mA into 2kΩ while maintaining linearity and THD < 0.01%. |
| 4 (VSS) | Negative Supply | Ground reference pin; must be connected directly to system ground plane with low-inductance path. |
| 5 (VDD) | Positive Supply | +2.7V to +5.5V supply input; requires local 0.1µF ceramic decoupling capacitor placed within 2mm. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-Rail Output Swing | Delivers full output voltage range (VSS to VDD) into 2kΩ, maximizing ADC utilization and reducing need for level-shifting circuitry. |
| No Phase Reversal on Overdrive | Prevents latch-up and erroneous output polarity during input overvoltage events - critical for robust zero-crossing detection in ignition modules. |
| Ground-Sensing Inputs | Accepts input signals down to VSS (0V), enabling direct interfacing with grounded sensors like thermocouples or bridge outputs without bias networks. |
| Stable with 100pF Capacitive Loads | Eliminates need for isolation resistors when driving RC anti-aliasing filters or long cables - simplifies layout and reduces BOM count. |
| Automotive Temperature Range | Specified from -40°C to +125°C with guaranteed parameters, supporting under-hood and body-control module deployments without derating. |
Applications
| Single-Supply Zero-Crossing Detector | Sensor Signal Detection |
|---|---|
|
Use Scenario: Detecting AC waveform zero crossings in electronic ignition systems using a single +5V supply. IC Role / Device Role / Timing Role: Comparator-like amplifier configured with hysteresis to generate clean digital edges from analog engine crank signals. Use Value: Eliminates dual-supply requirement and leverages rail-to-rail swing to maximize noise margin against EMI in high-voltage ignition environments. |
Use Scenario: Amplifying low-level mV-range outputs from automotive pressure or temperature sensors before ADC sampling. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with ground-sensing inputs and minimal offset drift (±6µV/°C). Use Value: Maintains accuracy across under-hood temperature swings while enabling direct connection to 12-bit SAR ADCs with 0–5V input ranges. |
| Portable Communicators | Infrared Receivers for Remote Controls |
|
Use Scenario: Signal conditioning in handheld medical or industrial data loggers powered by single-cell Li-ion batteries (2.7–4.2V). IC Role / Device Role / Timing Role: Low-power, wide-supply op amp for buffering sensor outputs and driving internal ADC references. Use Value: 4.0mA max supply current and 2.7V minimum operation extend battery life while preserving 7MHz bandwidth for responsive UI feedback. |
Use Scenario: Amplifying weak, modulated IR photodiode currents in consumer remote control receivers. IC Role / Device Role / Timing Role: High-speed, low-noise transimpedance amplifier with 29nV/√Hz input voltage noise at 10kHz. Use Value: Enables reliable demodulation of 38kHz carrier signals with fast settling (450ns to 0.01%) and low THD (0.01% at 10kHz). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TSV911ILT | Lower GBW (8MHz), higher input bias current (1pA typ), same SOT23-5 package, but only rated to +85°C. | Not qualified for automotive under-hood use; suitable for commercial portable devices with tighter noise budgets. | Select TSV911ILT only if ambient temperature stays below +85°C and lower input bias is not required. |
| MCP6001T-E/OT | Slower GBW (1MHz), wider offset range (±4.5mV max), same supply range and SOT23-5 footprint, AEC-Q100 Grade 3 certified. | Better automotive qualification but insufficient bandwidth for fast zero-crossing or IR demodulation. | Choose MCP6001T-E/OT when AEC-Q100 compliance is mandatory and signal bandwidth < 200kHz suffices. |
Compared with TSV911ILT and MCP6001T-E/OT, the MAX4484AUK uniquely combines automotive-grade temperature range, 7MHz bandwidth, rail-to-rail output, and ground-sensing inputs in a 5-pin SOT23 - making it the only option among the three that meets all requirements for high-speed, single-supply sensor front-ends in harsh environments.
Availability
MAX4484AUK is available at Aetrix Electronics and suitable for automotive engine control units, portable medical instruments, and infrared remote receiver modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX4484AUK 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 MAX4484AUK belongs to Maxim's rail-to-rail, single-supply op amp family engineered for high-speed, low-voltage signal conditioning in space- and power-constrained systems where reliability across extreme temperatures is essential.
FAQ
What is the maximum capacitive load the MAX4484AUK can drive without instability?
The MAX4484AUK is unity-gain stable with capacitive loads up to 100pF across its full operating temperature range (-40°C to +125°C). This specification is verified in the datasheet's "Capacitive-Load Stability" parameter table and confirmed by typical operating curves showing stable phase margin ≥55° even with 100pF load. Exceeding this value may cause ringing or oscillation unless isolated with a series resistor.
Does the MAX4484AUK support true ground-sensing input operation?
Yes, the MAX4484AUK supports ground-sensing inputs: its input common-mode voltage range extends down to VSS (0V) and up to VDD – 1.4V at full temperature range. This allows direct interfacing with grounded sensors such as thermocouples or Wheatstone bridges without external level-shifting circuitry - a capability explicitly confirmed in the Electrical Characteristics table under "Input Common-Mode Voltage Range".
What is the guaranteed output voltage swing for the MAX4484AUK when loaded with 2kΩ?
At TA = -40°C to +125°C and RL = 2kΩ, the MAX4484AUK guarantees an output voltage high (VOH) within 100mV of VDD and output voltage low (VOL) within 250mV of VSS. At room temperature, typical performance improves to ≤50mV from each rail - enabling full utilization of 0–VDD ADC input ranges in precision measurement systems.
Is the MAX4484AUK pin-compatible with other op amps in the MAX448x family?
No - the MAX4484AUK (single, SOT23-5) is not pin-compatible with the dual MAX4486 or quad MAX4487, which use 8-pin and 14-pin packages respectively. However, within the single-amplifier variants, the MAX4484AUK (SOT23-5) shares identical pinout with the SC70-5 version (MAX4484AXK-T), differing only in package dimensions and thermal characteristics - both use Pin 1=IN+, Pin 2=IN−, Pin 3=OUT, Pin 4=VSS, Pin 5=VDD.
What is the total harmonic distortion (THD) performance of the MAX4484AUK at 10kHz?
The MAX4484AUK delivers 0.01% THD at f = 10kHz, VOUT = 2Vp-p, AV = +1V/V, and RL = 2kΩ - a value specified in the Electrical Characteristics table and validated by Figure MAX4484 toc17. This low distortion level supports high-fidelity signal amplification in IR receiver and audio-sensing applications where harmonic content must remain below 10-bit resolution thresholds.
MAX4484AUK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 20V/µs
- Gain Bandwidth Product:
- 7 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.1 pA
- Voltage - Input Offset:
- 300 µV
- Current - Supply:
- 2.2mA
- Current - Output / Channel:
- 33 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
MAX4484AUK FAQ
1.How can I place an order for MAX4484AUK through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4484AUK 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 MAX4484AUK reliable?
The price and inventory of MAX4484AUK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4484AUK is usually 5 days.
3.What payment methods are accepted for MAX4484AUK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4484AUK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4484AUK?
MAX4484AUK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4484AUK 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 MAX4484AUK?
For technical support, including MAX4484AUK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4484AUK requirements.
6.How does Aetrix verify that MAX4484AUK is sourced from the original manufacturer or authorized distributors?
All MAX4484AUK 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 MAX4484AUK meets industry standards.
7.What is the process for return or replacement of MAX4484AUK?
All MAX4484AUK units undergo pre-shipment inspection (PSI). If there is an issue with MAX4484AUK, 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 MAX4484AUK part is unused and in its original packaging.
Return procedure for MAX4484AUK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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