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Analog Devices Inc./Maxim Integrated MAX4323EUT-T
- Part No.:
- MAX4323EUT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
MAX4323EUT-T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:1,933
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Product details
Overview
MAX4323EUT-T from Maxim Integrated is a single-channel, rail-to-rail input/output operational amplifier in a 6-pin SOT23 package, delivering 5MHz gain-bandwidth, 650µA quiescent current, 700µV typical offset voltage, and shutdown capability (25µA). It operates from 2.4V to 6.5V single supply and drives 250Ω loads - ideal for precision signal conditioning in battery-powered data-acquisition systems.
For engineers reviewing the MAX4323EUT-T datasheet, MAX4323EUT-T pinout, MAX4323EUT-T application, or MAX4323EUT-T equivalent, key selection criteria include rail-to-rail I/O swing at low supply voltage, shutdown-mode current consumption, capacitive-load stability up to 500pF, unity-gain stability with ≥250pF load, and SOT23-6 footprint compatibility for space-constrained portable designs.
Technical Context
The MAX4323EUT-T uses a dual-stage (NPN/PNP) rail-to-rail input architecture enabling full common-mode range from VEE to VCC, with switchover near VCC/2 to minimize CMRR degradation. Its output stage delivers true rail-to-rail swing under 250Ω load with <350mV headroom at 5V supply.
It features an internal 1µA pull-up on SHDN, enabling operation when left floating; pulling SHDN ≤0.8V activates shutdown, reducing ICC to 25µA and placing OUT in high-impedance state. The amplifier is unity-gain stable with capacitive loads up to 500pF without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 5MHz - supports closed-loop bandwidths up to ~4.5MHz at AV = +2, suitable for anti-aliasing and sensor signal amplification. |
| Supply Current per Amplifier | 650µA at VCC = 2.4V - enables >100-hour operation on a 65mAh coin cell in active mode. |
| Input Offset Voltage | 700µV typical (±2.5mV max) - ensures ≤0.14% gain error in 0.5V full-scale 12-bit ADC front-end. |
| Output Voltage Swing | Within 25mV of rails (RL = 100kΩ); within 200mV (RL = 250Ω) - preserves dynamic range in low-voltage single-supply systems. |
| Shutdown Supply Current | 25µA - reduces system standby power by >96% vs. active mode, critical for duty-cycled sensors. |
| Capacitive-Load Stability | Stable with CL ≤ 500pF - eliminates need for isolation resistor in most filter or cable-drive applications. |
| Slew Rate | 2V/µs - supports 10kHz full-scale sine output with <1% distortion at 2VP-P. |
Pinout & Package
The MAX4323EUT-T is housed in a 6-pin SOT23 package (JEDEC MO-178AA), 2.9mm × 1.6mm × 1.1mm, with gull-wing leads and standard 0.95mm pitch.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VEE | Negative supply pin; ground reference in single-supply operation; must be bypassed with 0.1µF ceramic capacitor. |
| 2 | IN− | Inverting input; high-impedance node requiring matched source impedance to IN+ to minimize bias-current-induced offset. |
| 3 | IN+ | Noninverting input; accepts common-mode voltages from VEE to VCC; protected by 1kΩ series resistors and back-to-back diodes. |
| 4 | SHDN | Active-low shutdown control; internally pulled up to VCC via 1µA current source; drives high-impedance state when ≤0.8V. |
| 5 | VCC | Positive supply pin; operates from 2.4V to 6.5V; requires local 0.1µF + ≥1µF bypassing for stability. |
| 6 | OUT | Amplifier output; rail-to-rail capable; high-impedance during shutdown; drives 250Ω loads with <0.1% THD at 10kHz. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Extends from VEE to VCC, enabling direct interfacing with 0–VCC sensors (e.g., thermistors, bridge outputs) without level-shifting. |
| Shutdown mode with high-Z output | Reduces supply current to 25µA and disconnects output electrically - essential for multiplexed sensor arrays and power-gated subsystems. |
| No phase reversal on overdriven inputs | Prevents latch-up or erroneous output transitions when input exceeds supply rails - improves robustness in noisy industrial environments. |
| Unity-gain stable with 500pF capacitive load | Eliminates need for output series resistor in RC filters or long-trace routing, simplifying layout and preserving bandwidth. |
| Low input bias current (±50nA typ) | Minimizes voltage drop across high-impedance sources (e.g., pH electrodes, photodiode transimpedance feedback), preserving accuracy. |
Applications
| Battery-Powered Data Acquisition | Portable Medical Sensors |
|---|---|
Use Scenario: Signal conditioning for 12-bit SAR ADC in handheld multimeter or environmental logger powered by CR2032. IC Role / Device Role: Single-supply, rail-to-rail op amp buffering and amplifying thermistor, RTD, or pressure sensor output before ADC sampling. Use Value: 650µA quiescent current extends battery life; 700µV offset ensures <0.2% measurement error at 0.5V full scale; shutdown cuts idle power during sleep intervals. |
Use Scenario: Front-end amplification of ECG electrode signals in wearable patch monitor with 3.3V Li-ion supply. IC Role / Device Role: Low-noise, rail-to-rail input amplifier with DC-coupled gain stage feeding ADC or analog comparator. Use Value: Input common-mode range to VEE allows direct connection to electrode bias network; 22nV/√Hz input noise preserves SNR; small SOT23-6 footprint saves PCB area. |
| RF Power Amplifier Bias Control | Low-Voltage Industrial Transmitters |
Use Scenario: Closed-loop bias voltage generation for GaAs FET PA in 2.4GHz ISM-band transmitter module. IC Role / Device Role: Precision voltage reference buffer and current-sense amplifier driving PA gate bias with fast transient response. Use Value: 2V/µs slew rate settles bias within 1µs after enable; shutdown isolates PA during RF mute cycles; rail-to-rail output ensures full 0–3.3V tuning range. |
Use Scenario: 4–20mA loop transmitter using 3.3V microcontroller and DAC, requiring precise I/V conversion and output drive. IC Role / Device Role: Output amplifier for DAC buffer and current-sense feedback path in HART-compatible loop design. Use Value: Drives 250Ω load while maintaining rail-to-rail swing; 5MHz GBW supports fast loop response; low offset minimizes zero-error in calibrated output. |
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 | Higher quiescent current (550µA vs. 650µA), lower GBW (6.4MHz), no shutdown, SO-5/SOT23-5 pinout (no SHDN pin). | Lacks shutdown functionality and rail-to-rail output swing at light loads; not suitable for duty-cycled systems. | Select only if shutdown is unnecessary and board layout accommodates different pinout and no SHDN requirement. |
| OPA348AIDBVR | Lower quiescent current (45µA), lower GBW (1MHz), rail-to-rail I/O, no shutdown, same SOT23-6 footprint but different pin mapping (SHDN absent). | Insufficient bandwidth for >100kHz signal paths; unsuitable for fast-settling data acquisition or PA bias control. | Choose only for ultra-low-power, low-bandwidth sensor buffering where 1MHz GBW suffices and shutdown is not required. |
Compared with TLV2461IDBVR and OPA348AIDBVR, the MAX4323EUT-T uniquely combines 5MHz bandwidth, 25µA shutdown current, and guaranteed rail-to-rail output into a standard SOT23-6 package - making it the only option among the three that meets simultaneous requirements for precision, speed, and power-gating in portable instrumentation.
Availability
MAX4323EUT-T is available at Aetrix Electronics and suitable for battery-powered data acquisition, portable medical sensors, RF power amplifier bias control, and low-voltage industrial transmitters requiring stable component supply across production lifecycles.
Supply support for MAX4323EUT-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 high-performance analog, mixed-signal, and power-management ICs for demanding industrial, medical, and communications applications.
The MAX432x family was engineered specifically for low-voltage, rail-to-rail signal conditioning in portable and battery-operated systems - emphasizing precision, low power, and small-footprint packaging like SOT23 and UCSP.
FAQ
What is the operating supply voltage range for the MAX4323EUT-T?
The MAX4323EUT-T operates from a single supply of 2.4V to 6.5V or dual supplies of ±1.2V to ±3.25V. At 2.4V, it maintains full rail-to-rail input common-mode range and output swing, enabling reliable operation in coin-cell and Li-ion-powered devices. The absolute maximum supply voltage is 7.5V.
Does the MAX4323EUT-T have a shutdown feature, and how does it behave?
Yes, the MAX4323EUT-T includes an active-low SHDN pin (Pin 4). When pulled ≤0.8V, it reduces supply current to 25µA per amplifier and places the output in a high-impedance state. When left floating or pulled high, the internal 1µA pull-up enables normal operation. This feature is confirmed in the datasheet's AC Electrical Characteristics and Applications Information sections.
What is the maximum capacitive load the MAX4323EUT-T can drive stably?
The MAX4323EUT-T is unity-gain stable with capacitive loads up to 500pF, as verified in the datasheet's AC Electrical Characteristics table and Figure 4 (Capacitive-Load Stability region). This eliminates the need for output isolation resistors in most RC filter or cable-drive configurations, unlike many general-purpose op amps requiring external compensation.
What is the typical input offset voltage of the MAX4323EUT-T, and how does it affect precision applications?
The MAX4323EUT-T has a typical input offset voltage of 700µV (±2.5mV maximum over temperature), measured at TA = +25°C with VCC = 5.0V. In a 0.5V full-scale 12-bit system, this contributes ≤0.14% gain error - acceptable for most portable instrumentation. For higher precision, external trimming or auto-zero architectures would be required.
Is the MAX4323EUT-T pin-compatible with other op amps in the MAX432x family?
The MAX4323EUT-T (SOT23-6) shares identical pinout with the MAX4327 in µMAX-10 and SO-14 packages for Pins 1–6 (VEE, IN−, IN+, SHDN, VCC, OUT), but differs from MAX4322 (SOT23-5, no SHDN) and MAX4326 (dual, SO-8). Pin compatibility is confirmed in the "Pin Configurations" and "Pin Description" sections of the datasheet - ensuring consistent layout reuse across single-amplifier variants with shutdown.
MAX4323EUT-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:
- 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-6
MAX4323EUT-T FAQ
1.How can I place an order for MAX4323EUT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4323EUT-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 MAX4323EUT-T reliable?
The price and inventory of MAX4323EUT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4323EUT-T is usually 5 days.
3.What payment methods are accepted for MAX4323EUT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4323EUT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4323EUT-T?
MAX4323EUT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4323EUT-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 MAX4323EUT-T?
For technical support, including MAX4323EUT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4323EUT-T requirements.
6.How does Aetrix verify that MAX4323EUT-T is sourced from the original manufacturer or authorized distributors?
All MAX4323EUT-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 MAX4323EUT-T meets industry standards.
7.What is the process for return or replacement of MAX4323EUT-T?
All MAX4323EUT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4323EUT-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 MAX4323EUT-T part is unused and in its original packaging.
Return procedure for MAX4323EUT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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