My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX4481AXT+
- Part No.:
- MAX4481AXT+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
MAX4481AXT+.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:471
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX4481AXT+ from Maxim Integrated is a single-channel, rail-to-rail output operational amplifier with active-low shutdown control, operating from +2.5V to +5.5V, drawing 50µA quiescent current (0.5µA in shutdown), and specified for −40°C to +125°C automotive use in sensor signal conditioning and zero-crossing detection circuits.
For engineers reviewing the MAX4481AXT+ datasheet, MAX4481AXT+ pinout, MAX4481AXT+ application, or MAX4481AXT+ equivalent, key selection criteria include shutdown leakage (<2.5µA at +125°C), rail-to-rail output swing (≤80mV from rails at 5kΩ), unity-gain stability up to 400pF capacitive load, and SC70-6 package compatibility with space-constrained automotive modules.
Technical Context
The MAX4481AXT+ employs a BiCMOS input stage enabling low input bias current (±100pA) and high input resistance (1000MΩ), paired with a rail-to-rail CMOS output stage delivering ±3mA sink/source capability. Its internal architecture supports stable operation with capacitive loads up to 400pF without external compensation.
Shutdown functionality is implemented via an active-low SHDN pin that disables the amplifier core and places the output in high-impedance state, reducing supply current to ≤1.0µA over full temperature range while maintaining <±2.5µA output leakage at VOUT = VDD/2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +5.5V - supports direct interface with Li-ion battery and 3.3V/5V logic systems without level shifting. |
| Quiescent Current | 50µA per amplifier - enables multi-year battery life in portable sensor nodes and ignition modules. |
| Shutdown Current | ≤1.0µA at +125°C - ensures ultra-low standby power in always-on automotive subsystems. |
| Output Swing | VSS + 0.02V to VDD − 0.03V at RL = 5kΩ - delivers full dynamic range across supply rails for ADC input buffering. |
| Unity-Gain Bandwidth | 140kHz - sufficient for DC-coupled sensor amplification and slow analog signal processing. |
| Input Offset Voltage | ±5.5mV max - enables accurate DC-coupled amplification of mV-level thermocouple or strain gauge signals. |
| Capacitive Load Stability | Stable up to 400pF - eliminates need for isolation resistors when driving long PCB traces or ADC input capacitance. |
Pinout & Package
MAX4481AXT+ is housed in a 6-pin SC70 package (outline 21-0077), measuring 2.0mm × 1.25mm × 0.95mm, optimized for high-density automotive PCB layouts and reflow-compatible with standard SMT processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN−) | Inverting input | Differential input node with ±100pA bias current; requires matched trace impedance for precision applications. |
| 2 (IN+) | Noninverting input | High-impedance input (1000MΩ) suitable for high-Z sensor interfaces like piezoelectric transducers. |
| 3 (OUT) | Amplifier output | Rail-to-rail CMOS output capable of ±3mA drive into 5kΩ; enters high-Z state during shutdown. |
| 4 (VSS) | Negative supply | Ground reference for single-supply operation; requires local 0.01µF bypass capacitor. |
| 5 (SHDN) | Active-low shutdown | Logic-controlled enable: pulled high for normal operation; must not float; drives <0.5µA leakage. |
| 6 (VDD) | Positive supply | +2.5V to +5.5V input; requires local 0.1µF ceramic bypass capacitor to minimize PSRR degradation. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full-scale signal headroom (≤80mV from rails) into 5kΩ, preserving ADC resolution in single-supply data acquisition. |
| 0.5µA shutdown current | Reduces system standby power by >99% vs. active mode, critical for battery-powered ignition and infrared receiver modules. |
| 400pF capacitive-load stability | Eliminates need for output series resistors when interfacing directly to SAR ADC inputs or long sensor cables. |
| −40°C to +125°C operation | Qualified for under-hood automotive environments without derating, supporting engine control and exhaust gas sensing. |
| 105dB open-loop gain | Ensures <0.01% gain error in closed-loop configurations with feedback resistors ≤1MΩ. |
Applications
| Single-Supply Zero-Crossing Detectors | Sensor Signal Detection |
|---|---|
Use Scenario: Detecting polarity reversal of AC-coupled crankshaft position signals in engine management units. IC Role / Device Role / Timing Role: Precision comparator with hysteresis, using rail-to-rail output to drive microcontroller GPIO interrupts. Use Value: 50µA quiescent current extends ECU sleep-mode battery life; shutdown mode cuts leakage to <1µA during cranking. | Use Scenario: Amplifying low-amplitude thermistor or RTD voltage outputs in HVAC control modules. IC Role / Device Role / Timing Role: DC-coupled instrumentation amplifier front-end with adjustable gain and offset nulling. Use Value: ±5.5mV VOS and ±3µV/°C drift ensure <1°C measurement error over full automotive temperature range. |
| Electronic Ignition Modules | Infrared Receivers |
Use Scenario: Conditioning coil driver feedback signals for closed-loop dwell time control in distributorless ignition systems. IC Role / Device Role / Timing Role: High-speed buffer isolating microcontroller PWM outputs from inductive load noise. Use Value: 140kHz GBW and 400pF load tolerance prevent oscillation when driving gate drivers with parasitic capacitance. | Use Scenario: Demodulating 38kHz carrier signals from IR remote receivers in infotainment systems. IC Role / Device Role / Timing Role: AC-coupled transimpedance amplifier converting photodiode current to clean voltage pulses. Use Value: 0.005% THD at 10kHz preserves pulse edge integrity for reliable NEC protocol decoding. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar rail-to-rail op amp with shutdown applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV8511IDBVR | Lower quiescent current (38µA), no guaranteed 400pF capacitive-load stability, SC70-6 package. | Limited to lower-frequency sensor buffering where output phase margin is less critical. | Prefer TLV8511IDBVR only if sub-40µA IQ is mandatory and capacitive load ≤100pF. |
| MCP6001UT-E/OT | No shutdown function, higher VOS (±3mV typ), same SC70-6 footprint but different pinout (SHDN pin absent). | Suitable for always-on signal chains where shutdown is unnecessary and tighter VOS is required. | Select MCP6001UT-E/OT only when shutdown is not needed and offset voltage <3mV is prioritized over temperature range. |
Compared with TLV8511IDBVR and MCP6001UT-E/OT, the MAX4481AXT+ uniquely combines guaranteed 400pF capacitive-load stability, −40°C to +125°C qualification, and sub-1µA shutdown current in a pin-defined SC70-6 package-making it the sole choice for automotive zero-crossing detectors requiring robustness across temperature and layout variations.
Availability
MAX4481AXT+ is available at Aetrix Electronics and suitable for automotive engine control units, battery-powered sensor nodes, and industrial infrared communication systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX4481AXT+ 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 automotive, industrial, and communications markets.
The MAX4480–MAX4483 family was engineered specifically for cost-sensitive, space-constrained automotive signal conditioning applications requiring rail-to-rail operation, ultra-low power, and extended temperature reliability.
FAQ
What is the maximum capacitive load the MAX4481AXT+ can drive without oscillation?
The MAX4481AXT+ 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 connection to ADC inputs or long PCB traces without external isolation resistors, provided the load is purely capacitive and no additional reactive components are present in the feedback path.
Does the MAX4481AXT+ require external pull-up on the SHDN pin?
Yes - the SHDN pin of the MAX4481AXT+ is active-low and must not be left floating. It should be pulled high to VDD (via ≤100kΩ resistor) for normal operation. Leaving SHDN unconnected risks undefined output state and increased supply current due to input leakage paths, as explicitly warned in the Applications Information section.
What is the output voltage swing specification of the MAX4481AXT+ at 5kΩ load?
At RL = 5kΩ, the MAX4481AXT+ delivers rail-to-rail output swing from VSS + 0.02V to VDD − 0.03V (typical), as specified in the Electrical Characteristics table under "Output Voltage Low" (VOL) and "Output Voltage High" (VOH) parameters. This ensures ≥99% of full-scale dynamic range for 12-bit ADC interfacing at 5V supply.
Is the MAX4481AXT+ qualified for automotive AEC-Q100 stress testing?
While the MAX4481AXT+ is specified for −40°C to +125°C operation and used in automotive applications such as electronic ignition and infrared receivers, the provided datasheet does not list formal AEC-Q100 qualification status. Designers requiring certified automotive grade should consult Maxim's (Analog Devices') official product change notices or contact Aetrix Electronics for latest qualification documentation.
Can the MAX4481AXT+ operate from a 2.5V supply while maintaining rail-to-rail output swing?
Yes - the MAX4481AXT+ is fully specified from +2.5V to +5.5V supply. At VDD = 2.5V, its output swing remains rail-to-rail (VSS + 0.02V to VDD − 0.03V), enabling direct interface with low-voltage microcontrollers and energy-harvesting sensor nodes without level translation, as verified in the "Minimum Operating Voltage vs. Temperature" plot (MAX4480 toc14).
MAX4481AXT+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Bulk
- 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:
- SC-70-6
MAX4481AXT+ FAQ
1.How can I place an order for MAX4481AXT+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4481AXT+ 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 MAX4481AXT+ reliable?
The price and inventory of MAX4481AXT+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4481AXT+ is usually 5 days.
3.What payment methods are accepted for MAX4481AXT+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4481AXT+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4481AXT+?
MAX4481AXT+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4481AXT+ 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 MAX4481AXT+?
For technical support, including MAX4481AXT+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4481AXT+ requirements.
6.How does Aetrix verify that MAX4481AXT+ is sourced from the original manufacturer or authorized distributors?
All MAX4481AXT+ 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 MAX4481AXT+ meets industry standards.
7.What is the process for return or replacement of MAX4481AXT+?
All MAX4481AXT+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4481AXT+, 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 MAX4481AXT+ part is unused and in its original packaging.
Return procedure for MAX4481AXT+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX4481AXT+ Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
