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Analog Devices Inc./Maxim Integrated MAX4322EUA+
- Part No.:
- MAX4322EUA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4322EUA+.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:3,745
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Product details
Overview
The MAX4322EUA+ 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 full rail-to-rail swing into 250Ω loads - enabling high-fidelity analog front-ends in portable data-acquisition and RSSI circuits.
For engineers reviewing the MAX4322EUA+ datasheet, MAX4322EUA+ pinout, MAX4322EUA+ application, or MAX4322EUA+ equivalent, key selection criteria include its 2.4V–6.5V single-supply operation, unity-gain stability with up to 500pF capacitive loads, shutdown capability (in MAX4323/MAX4327 variants), and µMAX-8 package compatibility with space-constrained PCB layouts.
Technical Context
This bipolar op amp employs complementary NPN/PNP input stages to achieve true rail-to-rail common-mode input range (VEE to VCC) and output swing (within millivolts of rails). Its architecture avoids phase reversal on overdriven inputs and maintains CMRR >54dB across –40°C to +85°C.
It operates stably under capacitive loading up to 500pF without external compensation, supports dual-supply (±1.2V to ±3.25V) or single-supply configurations, and achieves 2V/µs slew rate with 2.0µs settling time to 0.01% for 2V steps - critical for fast-settling sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 5MHz - enables stable closed-loop gain up to 5 at 1MHz, suitable for anti-aliasing and reconstruction filters. |
| Supply Current per Amplifier | 650µA at VCC = 2.4V - ensures <1.3mW power dissipation at 2.4V, ideal for multi-channel battery-operated DAQ. |
| Input Offset Voltage | ±700µV (typ) at TA = +25°C - supports 12-bit accuracy without trimming in 3.3V systems with 1V full-scale signals. |
| Output Voltage Swing | Within 250mV of rails into 250Ω (TA = +25°C) - preserves dynamic range in single-supply 3V systems driving ADC references. |
| Slew Rate | 2V/µs - supports 300kHz full-power bandwidth for 10VP-P signals, sufficient for audio and sensor preamplification. |
| Capacitive Load Stability | Stable with ≤500pF - eliminates need for isolation resistors when driving ADC input capacitance or long traces. |
| Common-Mode Input Range | VEE to VCC - allows direct sensing of ground-referenced or rail-referenced transducer outputs without level-shifting. |
Pinout & Package
The MAX4322EUA+ is housed in an 8-pin µMAX package (3.0mm × 3.0mm, 0.8mm 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 vs. SOT23.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output - drives 250Ω loads rail-to-rail; high-impedance when unused (no internal pull-up/down). |
| 2 | IN− | Inverting input - differential pair node; bias current polarity switches near VCC/2 due to dual-input-stage architecture. |
| 3 | IN+ | Noninverting input - matched impedance path required with IN− to minimize bias-current-induced offset. |
| 4 | VEE | Negative supply / ground reference - must be bypassed with ≥1µF + 0.1µF ceramic capacitor for stability. |
| 5 | N.C. | No connection - not internally bonded; leave unconnected to avoid parasitic coupling. |
| 6 | VCC | Positive supply - accepts 2.4V–6.5V single or ±1.2V–±3.25V dual supplies; requires local decoupling. |
| 7 | N.C. | No connection - floating; no internal connection or function. |
| 8 | N.C. | No connection - electrically isolated; PCB pad may be used as thermal relief or ground tie if needed. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-Rail I/O | Enables full utilization of 3.3V or 5V supply rails in single-supply systems - maximizes SNR in ADC driver stages. |
| Unity-Gain Stable | Operates reliably at AV = +1 with up to 500pF load capacitance - simplifies design of voltage followers and active filters. |
| No Phase Reversal | Prevents output latch-up during input overdrive - essential for robust interfacing with sensors exhibiting transient excursions. |
| Low Quiescent Current | 650µA per amplifier at 2.4V - extends battery life in always-on portable instrumentation and wireless sensor nodes. |
| High CMRR | ≥54dB over –40°C to +85°C - rejects supply noise and common-mode interference in noisy industrial environments. |
Applications
| Battery-Powered Data Acquisition | RSSI Signal Conditioning |
|---|---|
Use Scenario: Portable multichannel sensor logger acquiring thermocouple, RTD, and bridge outputs using a 12-bit SAR ADC. IC Role / Device Role / Timing Role: Precision buffer and level-shifter between transducer and ADC input, operating from 3.3V coin-cell supply. Use Value: Rail-to-rail input captures full sensor range; 700µV offset ensures <0.1% gain error; 650µA ICC minimizes standby drain. | Use Scenario: RF receiver front-end measuring received signal strength in Bluetooth/Wi-Fi modules. IC Role / Device Role / Timing Role: Logarithmic amplifier input stage converting RF detector diode output to linear voltage for MCU ADC sampling. Use Value: 5MHz GBWP supports fast RSSI response; rail-to-rail output drives ADC reference directly; low noise (22nV/√Hz) preserves dynamic range. |
| Portable Medical Instrumentation | Low-Voltage PA Bias Control |
Use Scenario: Handheld ECG monitor amplifying microvolt-level biopotentials with DC-coupled front-end. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier gain block, configured noninverting with matched feedback network. Use Value: No phase reversal prevents artifact clipping during electrode pop; 2V/µs slew rate handles QRS complex edges cleanly. | Use Scenario: Closed-loop bias control for Class-AB RF power amplifier in IoT gateway baseband section. IC Role / Device Role / Timing Role: Error amplifier comparing sensed PA collector current against DAC-set reference voltage. Use Value: 250Ω drive capability sustains loop stability into MOSFET gate capacitance; 500pF load tolerance avoids compensation networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX44260ASA+ | Lower 1.8V min supply, 10MHz GBWP, 1.2mA ICC, SO-8 package | Better for ultra-low-voltage (<2.4V) or higher-speed (>5MHz) designs; higher power consumption | Select MAX44260ASA+ only if 10MHz bandwidth or sub-2.4V operation is mandatory; otherwise MAX4322EUA+ offers superior power efficiency. |
| OPA333AIDBVR | Zero-drift architecture, 0.02µV/°C offset drift, 350kHz GBWP, SOT23-5 package | Superior DC precision for <10kHz applications; insufficient bandwidth for RSSI or fast DAQ | Choose OPA333AIDBVR for high-accuracy DC-coupled sensor bridges; MAX4322EUA+ remains preferred for AC-coupled or wideband signal paths. |
Compared with MAX44260ASA+, the MAX4322EUA+ trades 5MHz bandwidth and 650µA ICC for lower cost and proven µMAX footprint compatibility; versus OPA333AIDBVR, it sacrifices zero-drift DC stability for 14× higher bandwidth and rail-to-rail output drive into 250Ω - making it optimal for mixed-signal portable systems requiring speed, efficiency, and interface flexibility.
Availability
MAX4322EUA+ is available at Aetrix Electronics and suitable for battery-powered data acquisition, portable medical instrumentation, and low-voltage PA bias control requiring stable component supply across extended temperature ranges (–40°C to +85°C) and long production lifecycles.
Supply support for MAX4322EUA+ 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, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MAX4322 family was designed as a low-power, rail-to-rail I/O op amp series targeting precision signal conditioning in space- and energy-constrained portable electronics - emphasizing speed, supply flexibility, and ease of use in single-supply architectures.
FAQ
What is the maximum capacitive load the MAX4322EUA+ can drive without oscillation?
The MAX4322EUA+ is unity-gain stable and guaranteed to remain stable with capacitive loads up to 500pF when configured as a voltage follower or inverting amplifier. This specification is verified across temperature and supply voltage ranges per the manufacturer's AC electrical characteristics table and Figure 4 (Capacitive-Load Stability region). Loads exceeding 500pF require an isolation resistor (e.g., 39Ω) in series with the output, as demonstrated in Figure 6 of the datasheet.
Does the MAX4322EUA+ have a shutdown pin?
No, the MAX4322EUA+ does not include a shutdown function. Shutdown capability is exclusive to the MAX4323 and MAX4327 variants in the same family (e.g., MAX4323EUA, MAX4327EUB). The MAX4322EUA+ has no SHDN pin - all eight pins are either signal terminals (IN+, IN−, OUT), supply rails (VCC, VEE), or no-connect (N.C.) pads. Power control must be implemented externally via supply switching.
What is the typical input offset voltage of the MAX4322EUA+ at room temperature?
The typical input offset voltage of the MAX4322EUA+ is ±700µV at TA = +25°C, as specified in the DC Electrical Characteristics table under "Input Offset Voltage (VOS)" for the µMAX/SO package group. The maximum guaranteed limit over the full –40°C to +85°C range is ±6.0mV. This value reflects the bipolar process and dual-input-stage architecture, which prioritizes speed and rail-to-rail performance over ultra-low offset.
Can the MAX4322EUA+ operate from a 2.4V single supply?
Yes, the MAX4322EUA+ is fully specified to operate from a 2.4V to 6.5V single supply, as confirmed in both the General Description and Absolute Maximum Ratings sections. At 2.4V, it delivers 650µA supply current per amplifier, 5MHz gain-bandwidth, and rail-to-rail output swing within 350mV of the rails into 250Ω - making it suitable for coin-cell or Li-ion single-cell applications where headroom is constrained.
Is the MAX4322EUA+ pin-compatible with standard SO-8 op amps?
The MAX4322EUA+ uses the 8-pin µMAX package, which shares the same 3.0mm × 3.0mm body size and 0.65mm lead pitch as SO-8 but features a different pin 1 marking and thinner profile (0.8mm vs. 1.75mm). While footprint dimensions align, the µMAX requires specific reflow profiles and stencil design. It is not mechanically or solder-reflow compatible with SO-8 without layout adaptation, though electrical pinout matches SO-8 op amps (OUT, IN−, IN+, VEE, N.C., VCC, N.C., N.C.).
MAX4322EUA+ 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:
- 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:
- 8-uMAX/uSOP
MAX4322EUA+ FAQ
1.How can I place an order for MAX4322EUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4322EUA+ 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 MAX4322EUA+ reliable?
The price and inventory of MAX4322EUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4322EUA+ is usually 5 days.
3.What payment methods are accepted for MAX4322EUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4322EUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4322EUA+?
MAX4322EUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4322EUA+ 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 MAX4322EUA+?
For technical support, including MAX4322EUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4322EUA+ requirements.
6.How does Aetrix verify that MAX4322EUA+ is sourced from the original manufacturer or authorized distributors?
All MAX4322EUA+ 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 MAX4322EUA+ meets industry standards.
7.What is the process for return or replacement of MAX4322EUA+?
All MAX4322EUA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4322EUA+, 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 MAX4322EUA+ part is unused and in its original packaging.
Return procedure for MAX4322EUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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