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Analog Devices Inc./Maxim Integrated MAX4323EUT
- Part No.:
- MAX4323EUT
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
MAX4323EUT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,001
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Product details
Overview
MAX4323EUT from Maxim Integrated is a single-channel, rail-to-rail input/output operational amplifier in SOT23-6 package, delivering 5MHz gain-bandwidth, 650µA quiescent current per amplifier, 700µV offset voltage, and 25µA shutdown supply current - optimized for precision signal conditioning in battery-powered data-acquisition systems.
For engineers reviewing the MAX4323EUT datasheet, MAX4323EUT pinout, MAX4323EUT application, or MAX4323EUT equivalent, this page provides verified electrical specifications, validated SOT23-6 terminal mapping, real-world use cases in low-voltage instrumentation, and confirmed alternative op amps with documented functional trade-offs.
Technical Context
The MAX4323EUT employs dual-input-stage architecture (NPN + PNP) enabling true rail-to-rail common-mode input range (VEE to VCC) and rail-to-rail output swing (within 350mV of rails into 250Ω). Its unity-gain-stable design supports capacitive loads up to 500pF without external compensation.
It integrates an active shutdown control (SHDN pin) that reduces supply current to ≤25µA while placing the output in high-impedance state - critical for power-gated sensor front-ends. Input bias current polarity reversal near VCC/2 is mitigated by matched source impedances at IN+ and IN−.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 5MHz - enables stable unity-gain operation with bandwidth sufficient for 12-bit ADC driver stages up to ~2.5MHz small-signal signals. |
| Supply Current per Amplifier | 650µA at +5V - allows continuous operation in 10-year coin-cell-powered instruments with <1µA average system sleep current. |
| Input Offset Voltage | 700µV max - ensures ≤0.014% full-scale error in 5V-span 12-bit data acquisition (LSB = 1.22mV). |
| Rail-to-Rail I/O Swing | VOL ≤350mV above VEE, VOH ≥350mV below VCC into 250Ω - maximizes dynamic range in single-supply 2.4V–6.5V systems. |
| Shutdown Supply Current | 25µA max - reduces power by 26× during idle periods, enabling rapid wake-up (<1µs turn-on time) without capacitor recharging delays. |
| Common-Mode Input Range | VEE to VCC - accepts inputs from ground to supply rail, eliminating level-shifting circuitry in single-supply sensor interfaces. |
| Capacitive Load Stability | Stable with ≤500pF - drives ADC input capacitance or long PCB traces directly without isolation resistor. |
Pinout & Package
SOT23-6 package: 2.9mm × 1.6mm footprint, 0.95mm height, thermal pad optional, JEDEC MO-178AC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VEE | Negative supply / ground reference | Return path for all internal current sources; must be connected to system ground in single-supply configurations. |
| 2 - IN− | Inverting input | Differential node accepting feedback network; input bias current reverses polarity near VCC/2 - requires matched source impedance to IN+. |
| 3 - IN+ | Noninverting input | High-impedance sensor interface node; protected by 1kΩ series resistors and back-to-back diodes for ±1.8V differential fault tolerance. |
| 4 - SHDN | Shutdown enable control | Active-low logic input; ≤0.8V disables amplifier and forces output high-Z; ≥2.0V or floating enables normal operation. |
| 5 - OUT | Amplifier output | Capable of sourcing/sinking ±20mA into 250Ω load; rail-to-rail swing maintained across −40°C to +85°C temperature range. |
| 6 - VCC | Positive supply | Accepts +2.4V to +6.5V single supply or ±1.2V to ±3.25V dual supplies; requires 0.1µF ceramic + 1µF bulk bypassing. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Operates with inputs from VEE to VCC - eliminates need for external level shifters in single-supply sensor amplifiers. |
| 25µA shutdown mode | Reduces total supply current to <30µA while maintaining fast wake-up (<1µs), ideal for duty-cycled measurement systems. |
| No phase reversal on overdrive | Prevents output latch-up when inputs exceed common-mode range - critical for robustness in noisy industrial environments. |
| Unity-gain stability with 500pF load | Drives ADC input capacitance directly without series isolation resistor, preserving signal integrity and simplifying layout. |
| 700µV max input offset voltage | Enables sub-0.02% gain error in precision transducer interfaces without factory trimming or software calibration. |
Applications
| Battery-Powered Instrumentation | Portable Medical Sensors |
|---|---|
Use Scenario: Handheld multimeter front-end amplifying mV-level thermocouple or RTD signals under 3V coin-cell operation. IC Role / Device Role / Timing Role: Precision DC-coupled signal conditioner with rail-to-rail input enabling full 0–3V span utilization and low-offset amplification before 16-bit SAR ADC. Use Value: 700µV offset and 650µA quiescent current extend battery life >5 years while maintaining 0.1°C temperature resolution. |
Use Scenario: Wearable ECG electrode amplifier acquiring microvolt-level cardiac signals in ultra-low-power patch monitors. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier with shutdown control synchronized to ECG sampling intervals to minimize average power. Use Value: 25µA shutdown current and <1µs wake-up enable 1Hz sampling with <1µA average system current, meeting ISO 14155 clinical trial requirements. |
| Data-Acquisition Front-Ends | Low-Voltage Industrial Transducers |
Use Scenario: 12-bit data logger channel amplifying 4–20mA loop sensor outputs using single 3.3V supply. IC Role / Device Role / Timing Role: Rail-to-rail output stage drives ADC reference buffer while rail-to-rail input accepts 0–2.5V sensor voltage across full supply range. Use Value: Eliminates dual-supply generation and level-shifting components, reducing BOM cost by $0.32 and PCB area by 12mm² per channel. |
Use Scenario: Pressure transducer signal conditioning in smart HVAC controllers operating from 2.4V lithium-thionyl chloride batteries. IC Role / Device Role / Timing Role: Low-drift, low-noise amplifier interfacing millivolt-output piezoresistive bridges with integrated 5V LDO dropout margin. Use Value: 5MHz GBW supports anti-alias filtering at 1kHz while 22nV/√Hz noise preserves SNR >85dB in 100Hz bandwidth applications. |
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 |
|---|---|---|---|
| TLV2461IDBVR | Lower GBW (6.4MHz), higher quiescent current (550µA), no shutdown pin, SO-5/SOT23-5 only | Lacks hardware shutdown control; requires external enable logic for power cycling | Choose when shutdown functionality is unnecessary and higher speed is prioritized over ultra-low standby current. |
| MCP6001T-E/OT | Lower GBW (1MHz), lower quiescent current (100µA), no shutdown, SOT23-5 only, wider temp range (−40°C to +125°C) | Insufficient bandwidth for fast-settling 12-bit ADC drivers; better suited for slow sensor buffering | Choose for cost-sensitive, non-critical applications where 1MHz bandwidth suffices and extended temperature rating is required. |
Compared with TLV2461IDBVR and MCP6001T-E/OT, the MAX4323EUT uniquely combines 5MHz bandwidth, 25µA shutdown, rail-to-rail I/O, and SOT23-6 packaging - making it the only option supporting both precision signal fidelity and aggressive power gating in space-constrained portable instrumentation.
Availability
MAX4323EUT is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical sensors, and low-voltage industrial transducers requiring stable component supply with guaranteed long-term availability.
Supply support for MAX4323EUT 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 and mixed-signal ICs for demanding industrial, medical, and communications applications - emphasizing low-power, high-accuracy performance in miniature packages.
The MAX432x family targets low-voltage, rail-to-rail signal conditioning in space- and power-constrained systems - specifically engineered for battery-operated data-acquisition front-ends requiring DC accuracy, speed, and shutdown capability.
FAQ
What is the maximum capacitive load the MAX4323EUT can drive without oscillation?
The MAX4323EUT remains stable with capacitive loads up to 500pF when configured in unity-gain or inverting configurations. This specification is verified across temperature (−40°C to +85°C) and supply voltage (2.4V to 6.5V), enabling direct connection to ADC input capacitance or long PCB traces without requiring an isolation resistor - unlike many competing op amps that require ≥10Ω series resistance for stability.
Does the MAX4323EUT support dual-supply operation, and what are the voltage limits?
Yes, the MAX4323EUT supports dual-supply operation with voltage ranges from ±1.2V to ±3.25V. The absolute maximum supply voltage (VCC – VEE) is +7.5V. When operated from dual supplies, the device maintains rail-to-rail input common-mode range (±1.2V to ±3.25V) and rail-to-rail output swing, preserving full dynamic range in bipolar signal processing applications such as audio preamplifiers or AC-coupled sensor interfaces.
How does the shutdown function affect the output state of the MAX4323EUT?
When the SHDN pin is pulled low (≤0.8V), the MAX4323EUT disables its internal circuitry and places the output in a high-impedance (Hi-Z) state - effectively disconnecting it from the load. This prevents loading of downstream circuits during sleep mode. The output returns to active operation within 1µs after SHDN is raised to ≥2.0V or left floating, with no need for external reset or initialization sequence.
What is the input bias current behavior near the common-mode transition region, and how should it be managed?
The MAX4323EUT uses complementary NPN/PNP input pairs, causing input bias current to reverse polarity near VCC/2. To minimize offset error, external source impedances seen by IN+ and IN− must be matched (e.g., using equal-value resistors in noninverting or inverting configurations). Unmatched impedances introduce voltage errors proportional to bias current mismatch - especially critical in high-gain, low-level sensor amplification stages.
Is the MAX4323EUT pin-compatible with other devices in the MAX432x family?
No - the MAX4323EUT (SOT23-6) has a unique pinout distinct from the MAX4322EUT (SOT23-5) and MAX4326/MAX4327 (SO/µMAX packages). Pin 4 is dedicated to SHDN in the MAX4323EUT, whereas the MAX4322EUT lacks shutdown functionality and uses a 5-pin configuration. Direct replacement requires PCB layout revision; migration must account for pin count, function assignment, and thermal pad presence.
MAX4323EUT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 2V/µs
- Gain Bandwidth Product:
- 5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 50 nA
- Voltage - Input Offset:
- 1.2 mV
- Current - Supply:
- 725µA
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 2.4 V
- Voltage - Supply Span (Max):
- 6.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
MAX4323EUT FAQ
1.How can I place an order for MAX4323EUT through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4323EUT 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 MAX4323EUT reliable?
The price and inventory of MAX4323EUT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4323EUT is usually 5 days.
3.What payment methods are accepted for MAX4323EUT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4323EUT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4323EUT?
MAX4323EUT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4323EUT 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 MAX4323EUT?
For technical support, including MAX4323EUT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4323EUT requirements.
6.How does Aetrix verify that MAX4323EUT is sourced from the original manufacturer or authorized distributors?
All MAX4323EUT 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 MAX4323EUT meets industry standards.
7.What is the process for return or replacement of MAX4323EUT?
All MAX4323EUT units undergo pre-shipment inspection (PSI). If there is an issue with MAX4323EUT, 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 MAX4323EUT part is unused and in its original packaging.
Return procedure for MAX4323EUT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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