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Analog Devices Inc./Maxim Integrated MAX4245AUT-T
- Part No.:
- MAX4245AUT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
MAX4245AUT-T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:4,856
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Product details
Overview
The MAX4245AUT-T from Maxim Integrated is a single-channel, rail-to-rail input/output operational amplifier optimized for ultra-low-power, battery-powered systems. It delivers 1MHz gain-bandwidth, 320µA quiescent current per amplifier, 50nA shutdown current, and operates from +2.5V to +5.5V single supply - enabling precision signal conditioning in portable communications and sensor-signal detection applications.
For engineers reviewing the MAX4245AUT-T datasheet, MAX4245AUT-T pinout, MAX4245AUT-T application, or MAX4245AUT-T equivalent, key selection criteria include its 6-pin SOT23 package, integrated shutdown control (SHDN), rail-to-rail swing within 35mV of rails at 2kΩ load, and guaranteed operation from –40°C to +125°C.
Technical Context
The MAX4245AUT-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 on overdriven inputs. Its output stage drives 2kΩ loads while maintaining ≤35mV voltage swing from each rail under typical conditions.
It features a unity-gain stable architecture supporting capacitive loads up to 470pF without external compensation, with 70° phase margin and 20dB gain margin. Shutdown control (active-low SHDN) reduces supply current to 50nA and places the output in high-impedance state - critical for power-gated sensor front-ends.
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 coin-cell batteries. |
| 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 low-speed instrumentation signals. |
| Input Offset Voltage | ±0.4mV (typ), ±1.5mV (max) - ensures <1 LSB error in 12-bit ADC front-ends with 3V full-scale. |
| Capacitive Load Drive | Stable up to 470pF - eliminates need for isolation resistors in many PCB trace or cable-driven applications. |
| Operating Temperature | –40°C to +125°C - qualified for automotive engine bay, industrial motor controls, and outdoor IoT sensors. |
Pinout & Package
MAX4245AUT-T is housed in a space-saving 6-pin SOT23 package (package code U6+4), footprint-compatible with industry-standard SC70-6 but offering higher thermal dissipation (695mW at +70°C).
| 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 for all input/output voltages and shutdown logic. |
| 3 | IN− | Inverting input - differential pair node; internal 5.3kΩ series resistors provide ESD protection. |
| 4 | OUT | Amplifier output - rail-to-rail swing (≤35mV from rails into 2kΩ), high-impedance in shutdown. |
| 5 | SHDN | Active-low shutdown control - logic low (≤0.3×VDD) disables amplifier and forces output high-Z. |
| 6 | VDD | Positive supply - accepts +2.5V to +5.5V; bypass with 100nF capacitor to VSS for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full dynamic range utilization in single-supply systems - no level-shifting circuitry required for 0–VDD signal chains. |
| 50nA shutdown current | Reduces average system power in duty-cycled sensing (e.g., 1s active / 999s shutdown → 99.9% power saving). |
| No phase inversion | Prevents output latch-up during input overdrive - essential for zero-crossing detectors and comparator-like behavior. |
| 470pF capacitive-load stability | Supports direct driving of long traces, LCD segments, or RF filter networks without added isolation components. |
| 110dB open-loop gain | Ensures <0.01% gain error in precision gain stages (e.g., G = 100) with 2kΩ load. |
Applications
| Portable Communications | Single-Supply Zero-Crossing Detectors |
|---|---|
|
Use Scenario: Signal amplification and level-shifting in Bluetooth/Wi-Fi module microphone preamps and RSSI monitoring circuits. IC Role / Device Role / Timing Role: Low-noise, rail-to-rail op amp providing gain and DC biasing for AC-coupled audio paths. Use Value: 52nV/√Hz input voltage noise and 0.01% THD preserve SNR in sub-100µA power budgets. |
Use Scenario: Detecting polarity transitions in low-amplitude analog sensor outputs (e.g., thermopile, piezoelectric) using comparator-like behavior. IC Role / Device Role / Timing Role: Precision op amp configured as high-gain inverter with hysteresis, leveraging no-phase-inversion guarantee. Use Value: Eliminates false triggering during input overdrive - critical for reliable edge detection in noisy industrial environments. |
| Electronic Ignition Modules | Sensor-Signal Detection |
|
Use Scenario: Amplifying and conditioning coil current feedback signals in automotive ignition control units operating at 125°C ambient. IC Role / Device Role / Timing Role: High-temp-stable amplifier interfacing with current-sense resistors before ADC sampling. Use Value: Guaranteed –40°C to +125°C operation and ±2µV/°C offset drift ensure consistent timing accuracy across temperature extremes. |
Use Scenario: Front-end amplification for MEMS accelerometers, pressure transducers, and gas sensors in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Ultra-low-power signal conditioner with shutdown synchronized to sensor wake-up cycles. Use Value: 320µA active current + 50nA shutdown enables >10-year battery life in 1-minute measurement intervals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-power, rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV9001IDBVR | Higher quiescent current (65µA vs. 320µA), no shutdown, 1MHz GBW, same SOT23-6 package. | Lacks shutdown control - unsuitable for duty-cycled systems requiring deep sleep states. | Choose when shutdown is unnecessary and lower cost is prioritized over ultra-low power. |
| OPA316IDBVR | Lower input offset (±100µV typ), higher quiescent current (400µA), no shutdown, 10MHz GBW. | Excess bandwidth increases noise and power - overkill for DC/low-frequency sensor signals. | Choose only if higher precision (sub-100µV VOS) and faster settling (<1µs) justify 25% higher supply current. |
Compared with TLV9001IDBVR and OPA316IDBVR, the MAX4245AUT-T uniquely balances ultra-low shutdown current (50nA), rail-to-rail I/O, and 1MHz bandwidth in a 6-pin SOT23 - making it the only option among the three qualified for extended-life, temperature-hardened, power-gated sensor interfaces.
Availability
MAX4245AUT-T is available at Aetrix Electronics and suitable for portable communications, electronic ignition modules, and sensor-signal detection applications requiring stable component supply across automotive, industrial, and medical device production lifecycles.
Supply support for MAX4245AUT-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 MAX4245AUT-T belongs to the MAX4245/MAX4246/MAX4247 family - engineered specifically for ultra-low-power, rail-to-rail signal conditioning in harsh-environment, battery-operated systems.
FAQ
What is the maximum capacitive load the MAX4245AUT-T can drive without oscillation?
The MAX4245AUT-T is unity-gain stable with capacitive loads up to 470pF, as verified in the manufacturer's Electrical Characteristics table and Typical Operating Characteristics (Figure MAX4245 toc15). This specification applies under standard test conditions (VDD = +2.7V, RL = 2kΩ, TA = +25°C) and is guaranteed by design across the full –40°C to +125°C temperature range. Loads exceeding 470pF require an isolation resistor (e.g., 100Ω) between OUT and CL to maintain stability.
Does the MAX4245AUT-T support dual-supply operation?
Yes, the MAX4245AUT-T supports dual-supply operation from ±1.25V to ±2.75V, as explicitly stated in the Applications Information section. Its rail-to-rail input and output stages function correctly with symmetric supplies, and the shutdown pin (SHDN) must be referenced to VSS (not ground) in dual-supply configurations to ensure proper disable functionality.
What is the input common-mode voltage range for the MAX4245AUT-T at +125°C?
At +125°C, the input common-mode voltage range for the MAX4245AUT-T is VSS – 0.1V to VDD + 0.1V, per Note 4 in the Electrical Characteristics table. This extended range - beyond the rails - is enabled by the composite NPN/PNP input stage and is fully specified across the entire –40°C to +125°C operating temperature range.
How does the shutdown feature affect output state in the MAX4245AUT-T?
When SHDN is pulled low (≤0.3×VDD), the MAX4245AUT-T disables its amplifier core and places the OUT pin in a high-impedance (tri-state) condition, with output leakage current limited to ±0.5µA (max) over temperature. This allows multiple MAX4245AUT-T devices to share a common bus or ADC input without contention, and eliminates loading of downstream circuitry during sleep.
Is the MAX4245AUT-T RoHS-compliant and lead-free?
Yes, the MAX4245AUT-T is RoHS-compliant and lead-free, indicated by the "+T" suffix in its ordering code and confirmed in the Ordering Information table footnote ("+Denotes a lead(Pb)-free/RoHS-compliant package"). The package meets JEDEC J-STD-020 moisture sensitivity level 1 and is qualified for reflow soldering at +260°C peak temperature.
MAX4245AUT-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- 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:
- SOT-6
MAX4245AUT-T FAQ
1.How can I place an order for MAX4245AUT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4245AUT-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 MAX4245AUT-T reliable?
The price and inventory of MAX4245AUT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4245AUT-T is usually 5 days.
3.What payment methods are accepted for MAX4245AUT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4245AUT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4245AUT-T?
MAX4245AUT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4245AUT-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 MAX4245AUT-T?
For technical support, including MAX4245AUT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4245AUT-T requirements.
6.How does Aetrix verify that MAX4245AUT-T is sourced from the original manufacturer or authorized distributors?
All MAX4245AUT-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 MAX4245AUT-T meets industry standards.
7.What is the process for return or replacement of MAX4245AUT-T?
All MAX4245AUT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4245AUT-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 MAX4245AUT-T part is unused and in its original packaging.
Return procedure for MAX4245AUT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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