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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:2,363
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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 systems. It operates from +2.5V to +5.5V, draws 320µA quiescent current per amplifier, achieves 1MHz gain-bandwidth product, and supports capacitive loads up to 470pF while remaining unity-gain stable - ideal for portable sensor-signal conditioning and zero-crossing detection in harsh environments.
For engineers reviewing the MAX4245AXT+T datasheet, MAX4245AXT+T pinout, MAX4245AXT+T application, or MAX4245AXT+T equivalent, key selection criteria include its 50nA shutdown current, SC70-6 package footprint, -40°C to +125°C operating range, rail-to-rail swing within 35mV of rails at 2kΩ load, and verified performance under single-supply battery-powered conditions.
Technical Context
The MAX4245AXT+T uses a composite NPN/PNP input stage enabling true rail-to-rail common-mode input range (VSS − 0.1V to VDD + 0.1V) and eliminates phase inversion during overdrive. Its output stage delivers rail-to-rail swing with ≤35mV headroom at 2kΩ load and sustains stability into 470pF without external compensation.
Shutdown is controlled by an active-low SHDN pin referenced to VSS, reducing supply current to 50nA (max) and placing the output in high-impedance state. Input bias current is ±10nA (typ), offset voltage is ±0.4mV (max), and PSRR is 90dB (typ) - all specified across the full -40°C to +125°C temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +5.5V single supply - enables direct operation from Li-ion, coin-cell, or regulated low-voltage rails without level-shifting. |
| Quiescent Current | 320µA per amplifier (typ) - supports multi-year battery life in always-on sensor nodes and portable instrumentation. |
| Shutdown Current | 50nA (max) - reduces system standby power to nanoampere level while preserving fast wake-up (<4µs enable time). |
| Gain-Bandwidth Product | 1.0MHz - sufficient for precision DC-coupled amplification, active filtering, and low-frequency signal conditioning up to ~100kHz. |
| Capacitive Load Drive | 470pF (unity-gain stable) - allows direct interface to ADC input capacitors, long PCB traces, or EMI filters without oscillation. |
| Input Offset Voltage | ±0.4mV (max) - ensures <1mV total error in 12-bit systems with gains ≥10, critical for accurate zero-crossing and sensor offset correction. |
| Output Swing (2kΩ) | VOL = 30mV, VOH = 35mV (max) - delivers full dynamic range from 0V to VDD in single-supply configurations, maximizing SNR. |
Pinout & Package
The MAX4245AXT+T is housed in a 6-pin SC70 package (package code X6SN+1), measuring 2.0mm × 1.25mm × 0.9mm - optimized for ultra-dense PCB layouts in wearables and IoT edge nodes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN+ | Noninverting input - accepts signals from VSS − 0.1V to VDD + 0.1V; matched impedance minimizes bias-current-induced offset. |
| 2 | VSS | Ground or negative supply - reference node for all internal circuitry and shutdown logic; must be connected before VDD. |
| 3 | IN− | Inverting input - differential pair input with same rail-to-rail common-mode range as IN+; protected by 5.3kΩ series resistors. |
| 4 | OUT | Amplifier output - rail-to-rail capable, high-impedance in shutdown mode; drives 2kΩ loads with <35mV headroom. |
| 5 | SHDN | Active-low shutdown control - pulls low to reduce supply current to 50nA; logic thresholds are 0.3×VDD (low) and 0.7×VDD (high). |
| 6 | VDD | Positive supply - accepts +2.5V to +5.5V; bypassing with 100nF capacitor to VSS is mandatory for stability and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full-scale signal utilization in single-supply systems - no lost headroom at input or output, critical for low-voltage battery operation. |
| 50nA shutdown current | Reduces system-level standby power by >4 orders of magnitude versus active mode, extending shelf life and runtime in intermittent-sensing applications. |
| Unity-gain stable to 470pF | Eliminates need for external isolation resistors when driving ADC inputs or long traces - simplifies layout and preserves gain accuracy. |
| No phase inversion on overdrive | Prevents output latch-up or erroneous triggering in comparator-like zero-crossing circuits when inputs exceed supply rails. |
| −40°C to +125°C operation | Validated performance across automotive under-hood, industrial motor control, and outdoor sensor deployments without derating. |
Applications
| Portable Communications | Single-Supply Zero-Crossing Detectors |
|---|---|
Use Scenario: Signal conditioning in Bluetooth/Wi-Fi module front-ends where supply voltage drops from 3.3V to 2.7V during battery discharge. IC Role / Device Role / Timing Role: Single op amp configured as precision noninverting amplifier with gain = 2, buffering antenna RSSI or microphone preamp outputs. Use Value: Rail-to-rail I/O maintains full dynamic range across entire battery voltage range; 320µA quiescent current extends talk-time without compromising SNR. |
Use Scenario: Detecting AC zero crossings in smart metering or motor control using a resistor-divider biased input. IC Role / Device Role / Timing Role: Comparator replacement with hysteresis, leveraging rail-to-rail output swing and no phase inversion to avoid false triggers. Use Value: ±0.4mV offset ensures <10µs timing jitter at 50/60Hz; shutdown mode disables detection during sleep cycles, cutting leakage to 50nA. |
| Electronic Ignition Modules | Sensor-Signal Detection |
Use Scenario: Amplifying coil current sense signals in 12V automotive ignition systems exposed to load dump transients and wide temperature swings. IC Role / Device Role / Timing Role: High-side current sense amplifier with gain = 50, rejecting common-mode noise from switching coils. Use Value: 90dB PSRR rejects battery ripple; 125°C rating ensures reliability near engine blocks; SC70 footprint saves space in compact ECU modules. |
Use Scenario: Conditioning low-amplitude thermistor or strain gauge outputs in industrial condition-monitoring sensors. IC Role / Device Role / Timing Role: Instrumentation-grade buffer and filter driver, interfacing directly to SAR ADC inputs with 470pF hold capacitance. Use Value: Unity-gain stability into 470pF eliminates external RC compensation; 110dB open-loop gain ensures <0.01% linearity error at G = 100. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar rail-to-rail, low-power op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV9001IDBVR | No shutdown pin; 125µA quiescent current; 1MHz GBW; SOIC-5/SOT23-5 only - lacks SC70 option and 50nA shutdown. | Best for cost-sensitive, non-shutdown designs where PCB area is less constrained and standby power is secondary. | Select TLV9001IDBVR if shutdown functionality is unnecessary and SOIC-5 footprint is acceptable. |
| MCP6001UT-E/OT | 400nA shutdown current (vs. 50nA); 150µA active current; 1MHz GBW; SC70-5 package - missing SHDN pin, so requires external FET for true shutdown. | Suitable for basic rail-to-rail amplification where nanoamp shutdown is not required and board space permits discrete shutdown circuitry. | Choose MCP6001UT-E/OT only when 400nA shutdown suffices and SHDN pin integration is not mandatory. |
Compared with TLV9001IDBVR and MCP6001UT-E/OT, the MAX4245AXT+T uniquely combines SC70-6 packaging, integrated active-low shutdown with 50nA current, and guaranteed 125°C operation - making it the only option for ultra-low-power, high-temperature, space-constrained zero-crossing or sensor-buffering roles.
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 battery-operated and thermally demanding applications - emphasizing minimal quiescent current, robust shutdown, and guaranteed operation from -40°C to +125°C.
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 section of the datasheet. This specification applies under standard test conditions (VDD = +2.7V, TA = +25°C) and is guaranteed by design across the full -40°C to +125°C operating range. No external compensation is required for loads ≤470pF, simplifying design for ADC interface and EMI-filtered outputs.
Does the MAX4245AXT+T support dual-supply operation?
Yes, the MAX4245AXT+T supports dual-supply operation from ±1.25V to ±2.75V, as explicitly stated in the Applications Information section. When used in dual-supply mode, VSS becomes the negative rail (not ground), and the SHDN pin must be referenced to VSS - not GND - to ensure proper shutdown activation. Power-supply bypassing requires separate 100nF capacitors from VDD to GND and VSS to GND.
What is the input common-mode voltage range for the MAX4245AXT+T at +125°C?
At +125°C, the input common-mode voltage range for the MAX4245AXT+T is VSS − 0.1V to VDD + 0.1V, as specified in Note 4 of the Electrical Characteristics table. This rail-to-rail capability is maintained across the full temperature range and enables direct interfacing with sensors or dividers operating near supply rails - a key advantage over conventional op amps that lose input range at temperature extremes.
How does the shutdown function behave during power-up sequences?
The MAX4245AXT+T features a 4µs power-on time (tON), meaning the output settles to its active-state value within 4 microseconds after VDD reaches regulation. During this interval, the amplifier remains disabled until internal biasing stabilizes. The SHDN pin must be held high (≥0.7×VDD) after VDD is stable to enable normal operation; leaving SHDN floating risks indeterminate logic states due to internal pullup current and may cause erratic output behavior.
Is the MAX4245AXT+T RoHS-compliant and lead-free?
Yes, the MAX4245AXT+T is RoHS-compliant and lead-free, as indicated by the "+" suffix in the package marking and explicitly noted in the Ordering Information section ("+Denotes a lead(Pb)-free/RoHS-compliant package"). The SC70 package (X6SN+1) meets JEDEC standards for lead-free reflow soldering at +260°C peak temperature, and the device is rated for soldering at 300°C for 10 seconds during hand assembly.
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:
- Active
- 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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