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Analog Devices Inc./Maxim Integrated MAX4323ESA+T
- Part No.:
- MAX4323ESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4323ESA+T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,253
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Product details
Overview
MAX4323ESA+T from Maxim Integrated is a single, rail-to-rail input/output operational amplifier optimized for low-voltage, battery-powered precision signal conditioning. It delivers 5MHz gain-bandwidth, 650µA quiescent current per amplifier, ±700µV typical input offset voltage, and operates from 2.4V to 6.5V single supply - enabling high-accuracy analog front-ends in portable data-acquisition systems.
For engineers reviewing the MAX4323ESA+T datasheet, MAX4323ESA+T pinout, MAX4323ESA+T application, or MAX4323ESA+T equivalent, key selection criteria include its shutdown capability (25µA), 250Ω load drive, unity-gain stability with up to 500pF capacitive loads, rail-to-rail swing at 3V supply, and SO-8 package compatibility for legacy board reuse.
Technical Context
The MAX4323ESA+T employs a bipolar process with complementary NPN/PNP input stages to achieve true rail-to-rail input common-mode range (VEE to VCC) and output swing within millivolts of both rails. Its architecture supports stable operation with capacitive loads up to 500pF without external compensation.
It features an internal 1µA pull-up on the SHDN pin, enabling simple logic-level control: pulling SHDN ≤0.8V disables the amplifier and places the output in high-impedance state while reducing supply current to 25µA; floating or tying SHDN to VCC enables normal operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 5MHz - enables stable closed-loop operation up to ~500kHz at unity gain for sensor buffering and anti-aliasing filter driving. |
| Supply Current per Amplifier | 650µA at VCC = 2.4V - supports >100-hour runtime in coin-cell–powered instrumentation. |
| Input Offset Voltage | ±700µV max (TA = +25°C) - ensures <1mV error in 12-bit ADC front-end with 2.5V reference. |
| Output Voltage Swing | Within 200mV of rails at RL = 250Ω - delivers full dynamic range from 0.2V to 4.8V on 5V supply. |
| Shutdown Supply Current | 25µA - reduces system standby power by >96% versus active mode. |
| Capacitive-Load Stability | Stable with CL ≤ 500pF - eliminates need for isolation resistors when driving ADC input capacitance or long traces. |
| Slew Rate | 2V/µs - supports clean 100kHz sine-wave output at 2VP-P without distortion. |
Pinout & Package
The MAX4323ESA+T is housed in an 8-pin SO (Small Outline) package with standard 150-mil body width and gull-wing leads. Pin 1 is marked with a beveled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output - drives 250Ω loads directly; high-impedance during shutdown. |
| 2 | IN− | Inverting input - accepts signals across full rail-to-rail common-mode range (VEE to VCC). |
| 3 | IN+ | Noninverting input - matched bias current path to IN− for minimal offset error in transimpedance designs. |
| 4 | VEE | Negative supply / ground - referenced to system ground in single-supply configurations. |
| 5 | SHDN | Active-low shutdown control - internal 1µA pull-up allows enable-by-default operation; no external pull-up required. |
| 6 | VCC | Positive supply - accepts 2.4V to 6.5V; requires 0.1µF ceramic + ≥1µF bulk bypassing. |
| 7 | N.C. | No connection - not internally bonded; must remain unconnected on PCB. |
| 8 | N.C. | No connection - not internally bonded; must remain unconnected on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-Rail Input/Output | Enables full-scale signal capture and delivery in 3V systems without level-shifting circuitry. |
| Low-Power Shutdown Mode | Reduces ICC to 25µA while placing output in high-Z - ideal for time-sliced sensing architectures. |
| Unity-Gain Stable with Capacitive Loads | Operates reliably with up to 500pF directly at output - simplifies interface to SAR ADCs and RF filters. |
| No Phase Reversal on Overdrive | Prevents latch-up or erroneous output polarity when inputs exceed common-mode range - critical for fault-tolerant sensor interfaces. |
| Single-Supply Operation (2.4V–6.5V) | Eliminates dual-rail generation in portable equipment - compatible with Li-ion, Li-poly, and two-AA battery stacks. |
Applications
| Battery-Powered Data Acquisition | Portable Medical Sensors |
|---|---|
Use Scenario: Low-power analog front-end for handheld multimeters or environmental monitors sampling thermistors, RTDs, or bridge sensors. IC Role / Device Role / Timing Role: Precision buffer and gain stage before 12–16-bit SAR ADC; provides rail-to-rail swing and low offset to maximize ENOB. Use Value: 650µA supply current extends battery life; 700µV offset ensures <0.03% gain error at 2.5V full scale. | Use Scenario: Signal conditioning for wearable ECG or pulse oximetry analog chains operating from coin-cell batteries. IC Role / Device Role / Timing Role: DC-coupled amplifier for low-frequency biopotential signals; rejects electrode half-cell potential via rail-to-rail input CMVR. Use Value: Shutdown mode cuts system idle current to µA range; 2V/µs slew rate preserves QRS complex fidelity. |
| RF Power Amplifier Bias Control | Low-Voltage Industrial Transmitters |
Use Scenario: Closed-loop bias current control for GaAs or SiGe PA stages in IoT baseband modules. IC Role / Device Role / Timing Role: Error amplifier in current-sense feedback loop; regulates PA collector/drain current against temperature drift. Use Value: 5MHz GBW enables fast correction of thermal transients; rail-to-rail output drives MOSFET gate directly. | Use Scenario: 4–20mA transmitter front-end powered from loop supply (12–36V) with local 3.3V LDO. IC Role / Device Role / Timing Role: Sensor excitation driver and bridge amplifier for pressure or load-cell interfaces. Use Value: 250Ω load drive capability supports direct connection to DAC output buffers; ±700µV offset minimizes zero-point calibration burden. |
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 |
|---|---|---|---|
| TLV2462CDR | Higher quiescent current (650µA vs. 550µA typ), lower GBW (6.4MHz), no shutdown pin | Lacks integrated shutdown; requires external enable logic for power cycling | Select when shutdown functionality is unnecessary and higher speed is prioritized over lowest standby power |
| AD8601ARZ | Lower offset (60µV max), lower noise (12nV/√Hz), but no shutdown and higher ICC (1.3mA) | Optimized for ultra-precision DC applications, not low-power portable use | Select when offset and noise dominate requirements and battery life is secondary |
Compared with TLV2462CDR and AD8601ARZ, the MAX4323ESA+T uniquely balances sub-1mV offset, 5MHz bandwidth, and integrated shutdown in an SO-8 package - making it optimal for space-constrained, battery-operated systems requiring both precision and power gating.
Availability
MAX4323ESA+T is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical devices, and low-voltage industrial transmitters requiring stable component supply and long-term manufacturability.
Supply support for MAX4323ESA+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 and mixed-signal ICs for industrial, communications, and consumer applications.
The MAX432x family was designed specifically for precision, low-voltage, rail-to-rail signal conditioning in portable and energy-sensitive systems - emphasizing low ICC, wide supply range, and robust capacitive-load drive.
FAQ
What is the maximum capacitive load the MAX4323ESA+T can drive without oscillation?
The MAX4323ESA+T is unity-gain stable with capacitive loads up to 500pF, as verified in the datasheet's AC Electrical Characteristics and Typical Operating Characteristics (Figure 4). Driving larger loads requires an isolation resistor (e.g., 39Ω) in series with the output to restore phase margin, as shown in Figure 6. This capability eliminates external compensation in most data-acquisition and ADC-driving applications.
Does the MAX4323ESA+T require an external pull-up resistor on the SHDN pin?
No, the MAX4323ESA+T includes an internal 1µA pull-up on the SHDN pin. Leaving SHDN unconnected enables the amplifier by default. An external pull-down (≤50kΩ) is only needed to actively assert shutdown; no external pull-up is required or recommended.
Can the MAX4323ESA+T operate from a 3.3V supply and still achieve rail-to-rail output swing?
Yes - with a 3.3V supply and RL = 250Ω to ground, the MAX4323ESA+T delivers an output swing from within 200mV of VEE (0V) to within 200mV of VCC (3.3V), i.e., ~0.2V to 3.1V. This is confirmed in the DC Electrical Characteristics table (VO parameter) and Figure 3 of the datasheet.
What is the input bias current behavior near the supply rails, and how does it affect design?
The MAX4323ESA+T uses complementary NPN/PNP input pairs, causing input bias current polarity reversal near VCC/2. To minimize offset error, match source impedances at IN+ and IN− (per Figures 1a/1b). At VCM = VEE or VCC, IB is ±50nA typ; mismatched impedances >10kΩ will introduce measurable offset voltage.
Is the MAX4323ESA+T pin-compatible with other op amps in the SO-8 package footprint?
The MAX4323ESA+T uses a nonstandard SO-8 pinout: Pins 7 and 8 are N.C., and SHDN is on Pin 5 - unlike industry-standard SO-8 op amps (e.g., LM358, TL072) where Pin 5 is typically unused or offset null. PCB layout must follow the MAX4323-specific pin map; direct replacement without redesign is not possible.
MAX4323ESA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 700 µV
- 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:
- 8-SOIC
MAX4323ESA+T FAQ
1.How can I place an order for MAX4323ESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4323ESA+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 MAX4323ESA+T reliable?
The price and inventory of MAX4323ESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4323ESA+T is usually 5 days.
3.What payment methods are accepted for MAX4323ESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4323ESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4323ESA+T?
MAX4323ESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4323ESA+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 MAX4323ESA+T?
For technical support, including MAX4323ESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4323ESA+T requirements.
6.How does Aetrix verify that MAX4323ESA+T is sourced from the original manufacturer or authorized distributors?
All MAX4323ESA+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 MAX4323ESA+T meets industry standards.
7.What is the process for return or replacement of MAX4323ESA+T?
All MAX4323ESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4323ESA+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 MAX4323ESA+T part is unused and in its original packaging.
Return procedure for MAX4323ESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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