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Analog Devices Inc./Maxim Integrated MAX4245AXT-T
- Part No.:
- MAX4245AXT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
MAX4245AXT-T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,700
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Product details
Overview
MAX4245AXT-T from Maxim Integrated is a single-channel, rail-to-rail input/output operational amplifier with shutdown control, designed for ultra-low-power, space-constrained battery-powered systems. It delivers 1MHz gain-bandwidth, 320µA quiescent current per amplifier, 50nA shutdown current, and operates from +2.5V to +5.5V - enabling precision signal conditioning in portable communications and sensor-signal detection.
For engineers reviewing the MAX4245AXT-T datasheet, MAX4245AXT-T pinout, MAX4245AXT-T application, or MAX4245AXT-T equivalent, key selection criteria include its SC70-6 package footprint, guaranteed -40°C to +125°C operation, rail-to-rail swing within 35mV of rails at 2kΩ load, and verified shutdown logic compatibility with VIL = 0.3×VDD / VIH = 0.7×VDD.
Technical Context
The MAX4245AXT-T uses a composite NPN/PNP input stage enabling true rail-to-rail common-mode range (VSS − 0.1V to VDD + 0.1V) and eliminates phase inversion during overdrive. Its output stage drives 2kΩ loads while maintaining ≤60mV swing from supply rails across temperature.
It integrates internal 5.3kΩ series input resistors and back-to-back triple-diode stacks for ±2.1V differential input protection, with input bias current polarity reversal at the VDD/2 crossover point - requiring matched source impedances on IN+ and IN− to minimize offset error.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +5.5V single supply - supports direct connection to decaying Li-ion or alkaline battery rails without regulation. |
| Quiescent Current | 320µA per amplifier at +2.7V - enables multi-year operation in always-on sensor nodes. |
| Shutdown Current | 50nA max - reduces system standby power by >6,000× versus active mode. |
| Gain-Bandwidth Product | 1.0MHz - sufficient for anti-aliasing, filtering, and zero-crossing detection up to ~100kHz. |
| Input Offset Voltage | ±0.4mV typical - ensures <1mV error in 12-bit ADC front-end applications with unity-gain buffer. |
| Capacitive Load Drive | Stable up to 470pF - allows direct interface to long PCB traces or piezoelectric sensors without isolation resistor. |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive, industrial motor control, and electronic ignition modules. |
Pinout & Package
MAX4245AXT-T is housed in a 6-pin SC70 package (package code X6SN+1), measuring 2.0mm × 1.25mm × 0.9mm, with wettable flank leads for automated optical inspection. The pinout is fully compatible with SOT23-6 footprints but occupies 40% less board area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN+ | Noninverting input - accepts signals from VSS − 0.1V to VDD + 0.1V; requires matched impedance to IN− to cancel bias-current-induced offset. |
| 2 | VSS | Ground or negative supply - must be bypassed with 100nF capacitor to minimize PSRR degradation above 10kHz. |
| 3 | IN− | Inverting input - same rail-to-rail common-mode range as IN+; polarity reversal of input bias current occurs at VDD/2. |
| 4 | OUT | Amplifier output - delivers rail-to-rail swing (≤60mV from rails at 2kΩ) and enters high-impedance state during shutdown. |
| 5 | SHDN | Active-low shutdown control - logic low (≤0.3×VDD) disables amplifier and reduces supply current to 50nA; must not float. |
| 6 | VDD | Positive supply - accepts +2.5V to +5.5V; internal ESD protection rated to ±2kV HBM on all pins. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full dynamic range utilization in single-supply systems - e.g., 0–5V input → 0–5V output without level-shifting circuitry. |
| 50nA shutdown current | Reduces total system standby power to nanoampere levels - critical for energy-harvesting and coin-cell-powered devices. |
| No phase inversion on overdrive | Prevents latch-up or false triggering in comparator-like zero-crossing detector configurations when inputs exceed supply rails. |
| Unity-gain stable to 470pF | Eliminates need for external isolation resistors when driving capacitive transducers, long cables, or ADC sample capacitors. |
| 110dB open-loop gain | Ensures <0.01% gain error in precision instrumentation buffers with 10kΩ source and 100kΩ load conditions. |
Applications
| Portable Communications | Single-Supply Zero-Crossing Detectors |
|---|---|
|
Use Scenario: Signal amplification and conditioning in Bluetooth headsets and IoT edge nodes with tight power budgets. IC Role / Device Role / Timing Role: Rail-to-rail op amp configured as unity-gain buffer and active filter for microphone or RF IF signals. Use Value: 320µA quiescent current extends battery life beyond 3 years in always-listening wake-word detection circuits. |
Use Scenario: Detecting AC waveform zero crossings in smart metering and motor phase-control systems. IC Role / Device Role / Timing Role: High-speed comparator substitute with hysteresis, leveraging rail-to-rail swing and no phase inversion. Use Value: Reliable crossing detection down to 10mV amplitude due to ±0.4mV offset and 1MHz bandwidth - eliminating false triggers. |
| Electronic Ignition Modules | Sensor-Signal Detection |
|
Use Scenario: Amplifying coil current sense signals in automotive 12V ignition systems operating at -40°C to +125°C. IC Role / Device Role / Timing Role: Precision current-sense amplifier with shutdown during engine-off periods. Use Value: Guaranteed operation across full automotive temperature range and 50nA shutdown current prevent parasitic battery drain. |
Use Scenario: Conditioning low-level outputs from thermopiles, photodiodes, and strain gauges in industrial monitoring equipment. IC Role / Device Role / Timing Role: Low-noise, low-drift front-end amplifier with 52nV/√Hz input voltage noise and ±2µV/°C drift. Use Value: Enables sub-0.1°C temperature resolution and <0.01% THD in 16-bit data acquisition paths without external trimming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP6001T-E/OT | No shutdown pin; 100nA typical IQ; 1MHz GBW; SC70-6 package. | Lacks enable/disable control - unsuitable for intermittent-sensing architectures requiring nanoampere standby. | Select when shutdown functionality is unnecessary and cost sensitivity outweighs power optimization. |
| TSV911ICT | Higher 1.3mA IQ; 8MHz GBW; rail-to-rail output only; SOT23-5 package (no SHDN). | Excess bandwidth and current increase power consumption >4× - incompatible with battery-life-critical designs. | Select only when higher speed is mandatory and continuous operation is acceptable. |
Compared with MCP6001T-E/OT and TSV911ICT, the MAX4245AXT-T uniquely combines SC70-6 footprint, 50nA shutdown, and guaranteed -40°C to +125°C performance - making it the sole option for ultra-low-power, high-reliability, space-constrained sensing nodes.
Availability
MAX4245AXT-T is available at Aetrix Electronics and suitable for portable communications, electronic ignition modules, and sensor-signal detection requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX4245AXT-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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, automotive, and communications markets.
The MAX4245/MAX4246/MAX4247 family was engineered for ultra-low-power, rail-to-rail signal conditioning in harsh-environment portable electronics - prioritizing shutdown efficiency, temperature robustness, and minimal board footprint.
FAQ
What is the maximum capacitive load the MAX4245AXT-T can drive while remaining unity-gain stable?
The MAX4245AXT-T is unity-gain stable driving capacitive loads up to 470pF, as confirmed in the Electrical Characteristics table and Typical Operating Characteristics (Figure MAX4245 toc15). This eliminates the need for an isolation resistor in most sensor interface and ADC driver applications, preserving DC accuracy and simplifying layout. Exceeding 470pF may cause peaking or oscillation unless compensated per the Applications Information section.
Does the MAX4245AXT-T support dual-supply operation, and what are the voltage limits?
Yes, the MAX4245AXT-T supports dual-supply operation with symmetric rails from ±1.25V to ±2.75V, as stated in the Applications Information section. The absolute maximum ratings specify power-supply voltage (VDD to VSS) from -0.3V to +6V, and all other pins tolerate (VSS − 0.3V) to (VDD + 0.3V). For dual-supply use, SHDN must be referenced to VSS, not ground, to ensure proper shutdown activation.
How does the input stage architecture of the MAX4245AXT-T prevent phase inversion during overdrive?
The MAX4245AXT-T uses a composite NPN/PNP differential pair input stage that maintains linear operation across the full rail-to-rail common-mode range (VSS − 0.1V to VDD + 0.1V), explicitly eliminating phase inversion when inputs exceed supply rails - a documented feature in the Detailed Description section. This behavior is critical in zero-crossing detectors and comparator applications where overdrive is routine.
What is the guaranteed input offset voltage specification for the MAX4245AXT-T over temperature?
The MAX4245AXT-T has a guaranteed input offset voltage of ±1.5mV maximum over the full -40°C to +125°C operating range, per the Electrical Characteristics table (VOS row, "MAX" column, TA = -40°C to +125°C condition). At +25°C, the typical value is ±0.4mV, and drift is ±2µV/°C - enabling predictable error budgeting in precision analog front-ends.
Is the MAX4245AXT-T RoHS-compliant and lead-free?
Yes, the MAX4245AXT-T is RoHS-compliant and lead-free, indicated by the "+" suffix in the ordering code (MAX4245AXT+T) and explicitly noted in the Ordering Information section: "+Denotes a lead(Pb)-free/RoHS-compliant package." The SC70 package meets JEDEC standards for moisture sensitivity level (MSL) 1 and reflow profile compatibility up to +260°C.
MAX4245AXT-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.4V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 10 nA
- Voltage - Input Offset:
- 400 µV
- Current - Supply:
- 375µA
- Current - Output / Channel:
- 30 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
MAX4245AXT-T FAQ
1.How can I place an order for MAX4245AXT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4245AXT-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 MAX4245AXT-T reliable?
The price and inventory of MAX4245AXT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4245AXT-T is usually 5 days.
3.What payment methods are accepted for MAX4245AXT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4245AXT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4245AXT-T?
MAX4245AXT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4245AXT-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 MAX4245AXT-T?
For technical support, including MAX4245AXT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4245AXT-T requirements.
6.How does Aetrix verify that MAX4245AXT-T is sourced from the original manufacturer or authorized distributors?
All MAX4245AXT-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 MAX4245AXT-T meets industry standards.
7.What is the process for return or replacement of MAX4245AXT-T?
All MAX4245AXT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4245AXT-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 MAX4245AXT-T part is unused and in its original packaging.
Return procedure for MAX4245AXT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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