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Analog Devices Inc./Maxim Integrated MAX4481AUT+T
- Part No.:
- MAX4481AUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
MAX4481AUT+T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,803
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Product details
Overview
MAX4481AUT+T from Maxim Integrated is a single-channel, rail-to-rail output operational amplifier with active-low shutdown control, designed for ultra-low-power single-supply systems. It operates from +2.5V to +5.5V, draws 50μA quiescent current (typ), reduces to 0.5μA (max) in shutdown mode, and delivers rail-to-rail output swing into 5kΩ loads-ideal for portable sensor signal conditioning and battery-powered zero-crossing detection.
For engineers reviewing the MAX4481AUT+T datasheet, MAX4481AUT+T pinout, MAX4481AUT+T application, or MAX4481AUT+T equivalent, key selection criteria include shutdown leakage (<0.1μA at +25°C), 400pF capacitive-load stability, ±5.5mV input offset voltage (max), and SOT23-6 package compatibility with space-constrained automotive and industrial PCB layouts.
Technical Context
The MAX4481AUT+T implements a BiCMOS input stage enabling pA-level input bias current (±100pA max) and high input resistance (1000MΩ), supporting precision DC-coupled sensing. Its rail-to-rail output stage uses complementary push-pull circuitry to achieve 80mV from rails at 5kΩ load while maintaining unity-gain stability up to 400pF.
Shutdown functionality is implemented via an active-low SHDN pin that forces internal bias currents off and places the output in high-impedance state, with leakage <±0.1μA at +25°C. Enable delay (12μs) and shutdown delay (0.4μs) are specified for fast power-state transitions in duty-cycled applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +5.5V - supports direct Li-ion battery (3.0–4.2V) and regulated 3.3V/5V rails without level shifting. |
| Quiescent Current | 50μA per amplifier (typ) - enables >1-year operation on a 200mAh coin cell in always-on sensor nodes. |
| Shutdown Current | 0.5μA (max) - reduces system standby power by >99% versus active mode, critical for energy harvesting designs. |
| Input Offset Voltage | ±5.5mV (max) - ensures ≤0.1% gain error in 10-bit ADC front-ends with 5V full-scale range. |
| Capacitive-Load Stability | 400pF - allows direct driving of ADC input capacitors or long traces without external isolation resistors. |
| Rail-to-Rail Output Swing | VSS + 8mV / VDD − 80mV (RL = 5kΩ) - maximizes dynamic range in single-supply 12-bit data acquisition systems. |
| Gain-Bandwidth Product | 140kHz - sufficient for anti-aliasing filters, thermocouple amplification, and slow-control-loop compensation. |
Pinout & Package
MAX4481AUT+T is packaged in a RoHS-compliant 6-pin SOT23 (package code U6SN+1), footprint-compatible with industry-standard SOT-23-6 land patterns (Maxim land pattern no. 90-0175). The compact 2.9mm × 1.6mm body height (1.1mm max) supports high-density PCB layouts in handheld and automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN+) | Noninverting Input | High-impedance (1000MΩ) node for sensor voltage reference or feedback divider connection. |
| 2 (IN−) | Inverting Input | Differential input node; matched to IN+ for <±100pA input bias current and low offset drift. |
| 3 (OUT) | Amplifier Output | Rail-to-rail capable output driving up to 3mA source/sink; enters high-Z state during shutdown. |
| 4 (SHDN) | Active-Low Shutdown Control | Logic-compatible input (VIH = 0.7×VDD, VIL = 0.3×VDD); must be pulled high for normal operation. |
| 5 (VSS) | Negative Supply | Ground reference for single-supply operation; requires 0.01μF ceramic bypass capacitor. |
| 6 (VDD) | Positive Supply | +2.5V to +5.5V input; requires 0.01μF ceramic bypass capacitor adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output stage | Delivers full 0–VDD output swing into 5kΩ loads, preserving ADC resolution in 3.3V systems. |
| Ultra-low shutdown current | 0.5μA (max) enables microampere-level system sleep modes without compromising wake-up latency. |
| 400pF capacitive-load stability | Eliminates need for output series resistors when interfacing with SAR ADC inputs or long PCB traces. |
| 105dB open-loop gain (AVOL) | Ensures <0.001% gain error in precision instrumentation amplifiers using 100× closed-loop gain. |
| 0.005% THD at 1kHz | Supports clean audio pre-amplification and low-distortion sensor excitation in 16-bit measurement systems. |
Applications
| Portable Gas Sensors | Automotive Cabin Temperature Monitoring |
|---|---|
Use Scenario: Amplifying low-level signals from electrochemical gas sensors operating on coin-cell power. IC Role / Device Role / Timing Role: Single-supply transimpedance amplifier with shutdown control synchronized to periodic sensor read cycles. Use Value: 50μA quiescent current extends battery life to >2 years; 0.5μA shutdown current prevents drain during 99% idle time. | Use Scenario: Conditioning NTC thermistor outputs in HVAC control modules exposed to -40°C to +125°C ambient. IC Role / Device Role / Timing Role: Precision buffer and level-shifter between thermistor divider and 12-bit automotive-grade ADC. Use Value: Specified across -40°C to +125°C ensures stable offset and gain over full vehicle operating range. |
| Industrial IR Receiver Front-End | Electronic Ignition Module Signal Conditioning |
Use Scenario: Amplifying weak, modulated IR photodiode signals in factory automation presence detectors. IC Role / Device Role / Timing Role: AC-coupled bandpass amplifier with rail-to-rail output driving comparator input. Use Value: 140kHz GBW and 0.005% THD preserve 38kHz carrier integrity and minimize false-trigger events. | Use Scenario: Isolating and amplifying crankshaft position sensor signals in engine control units. IC Role / Device Role / Timing Role: High-EMI-immunity signal conditioner with fast enable/disable for cylinder-specific timing windows. Use Value: 12μs enable delay ensures output stabilization before spark timing window opens; 400pF stability tolerates noisy harness capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-channel, low-power op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV8511IDBVR | Lower quiescent current (380nA), no shutdown, 1.8–6V supply, 10kHz GBW | Better for multi-year energy-harvesting systems; unsuitable for fast shutdown cycling or >10kHz signal paths | Select TLV8511IDBVR only if shutdown is unnecessary and bandwidth requirements are <10kHz. |
| MCP6001T-E/OT | Higher quiescent current (100μA), no shutdown, 1.8–6V supply, 1MHz GBW, rail-to-rail I/O | Better for higher-speed signal chains; lacks shutdown for ultra-low-power duty cycling | Select MCP6001T-E/OT only if bandwidth >100kHz is required and shutdown functionality is not needed. |
Compared with TLV8511IDBVR and MCP6001T-E/OT, MAX4481AUT+T uniquely balances sub-1μA shutdown, 140kHz bandwidth, and rail-to-rail output in a 6-pin SOT23-making it optimal for automotive and industrial sensor nodes requiring both precision and aggressive power gating.
Availability
MAX4481AUT+T is available at Aetrix Electronics and suitable for portable communications, electronic ignition modules, and infrared receivers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX4481AUT+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 MAX4480–MAX4483 family was engineered for cost-sensitive, battery-operated systems needing rail-to-rail performance, ultra-low quiescent current, and robust operation from -40°C to +125°C.
FAQ
What is the maximum capacitive load the MAX4481AUT+T can drive while remaining stable?
The MAX4481AUT+T is unity-gain stable with capacitive loads up to 400pF, as confirmed in the Electrical Characteristics table and Typical Operating Characteristics (Figure MAX4480 toc19). This allows direct interface with ADC input capacitors and eliminates the need for output isolation resistors in most data acquisition designs. Exceeding 400pF may cause peaking or oscillation unless compensated per Figure 3 in the datasheet.
Does the MAX4481AUT+T require external bypass capacitors, and where should they be placed?
Yes, the MAX4481AUT+T requires a 0.01μF ceramic bypass capacitor between VDD and VSS, placed as close as possible to pins 6 and 5 respectively. This is explicitly stated in the "Power Supplies and Layout" section and Pin Description table. Proper placement minimizes supply impedance and prevents instability caused by parasitic inductance in power traces.
What is the typical enable delay time for the MAX4481AUT+T when exiting shutdown mode?
The typical enable delay time (tEN) for the MAX4481AUT+T is 12μs, measured from SHDN rising to 90% of final output voltage under RL = 5kΩ load conditions. This value is specified in the Electrical Characteristics table (page 2) and validated across -40°C to +125°C. It ensures rapid reactivation for time-critical sensor sampling intervals.
Can the MAX4481AUT+T operate from a 2.5V supply, and what is its output swing at that voltage?
Yes, the MAX4481AUT+T operates down to +2.5V supply (VDD), as guaranteed in the Absolute Maximum Ratings and Electrical Characteristics tables. At VDD = 2.5V and RL = 5kΩ, the output swings from VSS + 8mV to VDD − 80mV (i.e., 0.008V to 2.42V), preserving >96% of full-scale range for 10-bit+ systems.
Is the MAX4481AUT+T pin-compatible with other devices in the MAX4480–MAX4483 family?
No, the MAX4481AUT+T is not pin-compatible with MAX4480, MAX4482, or MAX4483 due to differing pin counts and functions: MAX4481AUT+T uses 6-pin SOT23 with SHDN on pin 4, whereas MAX4480 uses 5-pin SC70/SOT23 (no SHDN), and MAX4482/MAX4483 use 8-pin and 14-pin packages. Only MAX4481 variants (e.g., MAX4481AXT+T in SC70-6) share identical pinout but differ in package dimensions.
MAX4481AUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.08V/µs
- Gain Bandwidth Product:
- 140 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.1 pA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 50µA
- Current - Output / Channel:
- 17 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX4481AUT+T FAQ
1.How can I place an order for MAX4481AUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4481AUT+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 MAX4481AUT+T reliable?
The price and inventory of MAX4481AUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4481AUT+T is usually 5 days.
3.What payment methods are accepted for MAX4481AUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4481AUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4481AUT+T?
MAX4481AUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4481AUT+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 MAX4481AUT+T?
For technical support, including MAX4481AUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4481AUT+T requirements.
6.How does Aetrix verify that MAX4481AUT+T is sourced from the original manufacturer or authorized distributors?
All MAX4481AUT+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 MAX4481AUT+T meets industry standards.
7.What is the process for return or replacement of MAX4481AUT+T?
All MAX4481AUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4481AUT+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 MAX4481AUT+T part is unused and in its original packaging.
Return procedure for MAX4481AUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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