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Analog Devices Inc./Maxim Integrated MAX4323EUA
- Part No.:
- MAX4323EUA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4323EUA.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,121
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Product details
Overview
MAX4323EUA from Maxim Integrated is a single, rail-to-rail input/output operational amplifier optimized for low-voltage, precision signal conditioning in battery-powered systems. It delivers 5MHz gain-bandwidth, 650µA quiescent current per amplifier, ±700µV offset voltage (typ), and drives 250Ω loads - enabling high-fidelity analog front-ends in portable data-acquisition and RSSI circuits.
For engineers reviewing the MAX4323EUA datasheet, MAX4323EUA pinout, MAX4323EUA application, or MAX4323EUA equivalent, key selection criteria include shutdown functionality (25µA mode), µMAX-8 package compatibility, rail-to-rail swing at 2.4V–6.5V supply, and capacitive-load stability up to 500pF without external compensation.
Technical Context
The MAX4323EUA employs a dual-stage rail-to-rail input architecture (NPN/PNP pairs) with seamless switchover near VCC/2 to maintain CMRR across the full common-mode range (VEE to VCC). Its output stage delivers true rail-to-rail swing with <350mV headroom into 500Ω at 5V, supporting single-supply operation down to 2.4V.
It features unity-gain stability with up to 500pF capacitive load, no phase reversal on overdriven inputs, and independent shutdown control (SHDN pin) that places outputs in high-impedance state while reducing ICC to 25µA - critical for power-gated sensor interfaces and portable instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 5MHz - supports stable closed-loop gain up to 100× at 50kHz for anti-aliasing filter buffering. |
| Supply Voltage Range | 2.4V to 6.5V single supply - enables direct interface with Li-ion (3.0–4.2V) and 3.3V logic without level-shifting. |
| Quiescent Current | 650µA per amplifier (typ at 2.4V) - extends battery life in always-on sensor nodes and portable meters. |
| Input Offset Voltage | ±700µV (typ at +25°C) - ensures ≤0.014% error in 5V full-scale precision ADC front-ends. |
| Output Drive | 250Ω load drive capability - sustains 2Vpp signal integrity into typical SAR ADC input networks and RF detector loads. |
| Shutdown Current | 25µA (max) - reduces system standby power by >96% versus active mode, enabling microcontroller-triggered wake-up. |
| Capacitive Load Stability | Stable with up to 500pF - eliminates need for isolation resistors when driving ADC sample-hold capacitors or long PCB traces. |
Pinout & Package
The MAX4323EUA is housed in an 8-pin µMAX package (3.0mm × 3.0mm, 0.6mm height), pin-compatible with industry-standard SO-8 and µMAX footprints. This thermally enhanced, lead-free package supports reflow soldering and provides improved thermal resistance versus SOT23 variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier Output | Delivers rail-to-rail voltage swing; high-impedance during SHDN assertion. |
| 2 (IN−) | Inverting Input | Differential node for feedback network; protected by 1kΩ series resistors and back-to-back diodes. |
| 3 (IN+) | Noninverting Input | High-impedance sensing node; common-mode range extends to VEE and VCC rails. |
| 4 (VEE) | Negative Supply / Ground | Reference for single-supply operation; substrate tied to this pin. |
| 5 (SHDN) | Shutdown Control | Active-low logic input; internal 1µA pull-up allows floating-enable; asserts high-Z output and 25µA ICC. |
| 6 (N.C.) | No Connection | Not internally bonded; must be left unconnected or grounded per layout best practice. |
| 7 (VCC) | Positive Supply | Accepts 2.4V–6.5V; requires local 0.1µF ceramic + ≥1µF bulk bypass to ground. |
| 8 (N.C.) | No Connection | Not internally bonded; must be left unconnected or grounded per layout best practice. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-Rail I/O | Enables full dynamic range utilization in 3.3V systems - output swings within 350mV of rails into 500Ω, input accepts signals from VEE to VCC. |
| Low-Power Shutdown | Reduces supply current to 25µA while placing output in high-impedance state - ideal for time-sliced sensor readouts and sleep-mode preservation. |
| No Phase Reversal | Prevents output latch-up during input overdrive - critical for protecting downstream ADCs and comparators in transient-rich environments. |
| 500pF Capacitive Load Stability | Eliminates need for output isolation resistors when driving SAR ADC input capacitance (typically 10–30pF) plus PCB trace capacitance. |
| Unity-Gain Stable | Operates reliably at AV = +1 with up to 500pF load - simplifies design of voltage followers for reference buffering and sensor signal isolation. |
Applications
| Battery-Powered Data Acquisition | RSSI Signal Conditioning |
|---|---|
Use Scenario: Portable multimeter measuring 0–5V DC signals with 16-bit SAR ADC sampling at 100ksps. IC Role / Device Role / Timing Role: Precision buffer and level-shifter between high-impedance probe and ADC input, rejecting common-mode noise from shared ground paths. Use Value: Rail-to-rail input captures full 0–5V range; 650µA ICC extends 200-hour battery life; ±700µV VOS contributes <0.014% measurement error. | Use Scenario: Cellular baseband receiver estimating signal strength from logarithmic RF detector output. IC Role / Device Role / Timing Role: Low-noise, high-speed amplifier conditioning weak DC-coupled RSSI voltage prior to ADC digitization. Use Value: 5MHz GBWP preserves fast RSSI transients; 22nV/√Hz input noise avoids degrading detector SNR; shutdown mode disables during idle frames. |
| PA Bias Control Loop | Portable Medical Sensor Interface |
Use Scenario: Closed-loop bias control for GaAs power amplifier in handheld radio, requiring stable 0–3V setpoint generation. IC Role / Device Role / Timing Role: Error amplifier comparing DAC output to PA current sense voltage, driving MOSFET gate with rail-to-rail swing. Use Value: 250Ω drive capability ensures fast loop response; shutdown halts bias current during transmit gaps; no phase reversal prevents latch-up on current-sense faults. | Use Scenario: ECG front-end amplifying mV-level biopotentials in wearable patch monitor powered by coin cell. IC Role / Device Role / Timing Role: First-stage gain block with high CMRR and low VOS, operating from 3.0V supply with intermittent MCU wake-ups. Use Value: 650µA ICC minimizes average current draw; rail-to-rail output maximizes ADC utilization; 25µA shutdown enables 99% duty-cycle sleep. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX44260AUB+ | Lower 1.8V min supply, 1.5MHz GBWP, 1.2µA ICC - trades speed for ultra-low power. | Better suited for sub-10kHz sensor amplification where 5MHz bandwidth is unnecessary. | Select MAX44260AUB+ only if supply voltage drops below 2.4V or average ICC must be <1µA. |
| MCP6001T-E/OT | 2.7V–6.0V supply, 1MHz GBWP, 100µA ICC, no shutdown - lacks rail-to-rail input and SHDN pin. | Appropriate for cost-sensitive, non-battery-critical applications with ample supply margin. | Choose MCP6001T-E/OT only when shutdown and rail-to-rail input are not required and 1MHz bandwidth suffices. |
Compared with MAX44260AUB+ and MCP6001T-E/OT, the MAX4323EUA uniquely balances 5MHz bandwidth, rail-to-rail I/O, 25µA shutdown, and 2.4V operation - making it optimal for precision, battery-constrained signal chains where dynamic range and responsiveness are co-prioritized.
Availability
MAX4323EUA is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical devices, and RF front-end signal conditioning requiring stable component supply across extended production lifecycles.
Supply support for MAX4323EUA 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, medical, and communications applications.
The MAX432x family was engineered specifically for low-voltage, rail-to-rail signal conditioning in portable and energy-conscious systems - emphasizing speed, accuracy, and power efficiency without sacrificing robustness.
FAQ
What is the maximum capacitive load the MAX4323EUA can drive without oscillation?
The MAX4323EUA remains stable with capacitive loads up to 500pF in unity-gain configuration, as verified in the datasheet's Figure 4 and AC Electrical Characteristics table. This eliminates the need for output isolation resistors when interfacing with typical SAR ADC input capacitances (10–30pF) plus PCB trace capacitance, simplifying layout and preserving transient response.
Does the MAX4323EUA require external components for shutdown functionality?
No, the MAX4323EUA does not require external components for shutdown. Its SHDN pin (Pin 5) features an internal 1µA pull-up resistor; pulling SHDN low (≤0.8V) activates shutdown mode (25µA ICC, high-Z output), while leaving it floating or tying it to VCC enables normal operation - enabling simple microcontroller GPIO control.
Can the MAX4323EUA operate from a 2.4V supply while maintaining rail-to-rail output swing?
Yes, the MAX4323EUA operates from 2.4V to 6.5V and maintains rail-to-rail output swing across this range. At 2.4V supply, typical output swing is within 120mV of VEE and 220mV of VCC into 250Ω (per DC Electrical Characteristics table), delivering usable dynamic range for 2.4V logic and low-power ADCs.
What is the input bias current behavior of the MAX4323EUA near the supply rails?
The MAX4323EUA uses complementary NPN/PNP input stages, causing input bias current polarity to reverse near VCC/2. At VCM = VEE or VCC, typical IB is ±50nA (25°C); mismatch between stages results in ±12nA IOS. To minimize offset error, match source impedances at IN+ and IN− per Figures 1a/1b in the datasheet.
Is the MAX4323EUA pin-compatible with standard SO-8 op amps?
The MAX4323EUA uses the 8-pin µMAX package (3.0mm × 3.0mm), which shares the same pinout as SO-8 but in a smaller footprint. While not mechanically interchangeable, its pin assignment (OUT, IN−, IN+, VEE, SHDN, N.C., VCC, N.C.) matches SO-8 op amps like the MAX4322ESA - enabling drop-in replacement on µMAX-optimized PCBs with identical routing.
MAX4323EUA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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:
- 8-uMAX/uSOP
MAX4323EUA FAQ
1.How can I place an order for MAX4323EUA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4323EUA 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 MAX4323EUA reliable?
The price and inventory of MAX4323EUA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4323EUA is usually 5 days.
3.What payment methods are accepted for MAX4323EUA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4323EUA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4323EUA?
MAX4323EUA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4323EUA 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 MAX4323EUA?
For technical support, including MAX4323EUA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4323EUA requirements.
6.How does Aetrix verify that MAX4323EUA is sourced from the original manufacturer or authorized distributors?
All MAX4323EUA 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 MAX4323EUA meets industry standards.
7.What is the process for return or replacement of MAX4323EUA?
All MAX4323EUA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4323EUA, 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 MAX4323EUA part is unused and in its original packaging.
Return procedure for MAX4323EUA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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