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Analog Devices Inc./Maxim Integrated MAX4322EUK-T
- Part No.:
- MAX4322EUK-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX4322EUK-T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,646
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Product details
Overview
MAX4322EUK-T from Maxim Integrated is a single-channel, rail-to-rail input/output operational amplifier optimized for low-voltage, battery-powered signal conditioning. It delivers 5MHz gain-bandwidth, 650µA quiescent current per amplifier, ±700µV offset voltage (typ), and drives 250Ω loads - enabling precision data acquisition in portable medical sensors and handheld test equipment.
For engineers reviewing the MAX4322EUK-T datasheet, MAX4322EUK-T pinout, MAX4322EUK-T application, or MAX4322EUK-T equivalent, key selection criteria include single-supply operation down to 2.4V, rail-to-rail I/O swing at 3V, shutdown capability absence (distinguishing it from MAX4323/MAX4327), and SOT23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX4322EUK-T employs a bipolar process with complementary NPN/PNP input stage to achieve rail-to-rail common-mode input range (VEE to VCC) and output swing within 250mV of rails under 250Ω load. Its unity-gain-stable architecture supports capacitive loads up to 500pF without external compensation.
Unlike the MAX4323/MAX4327 variants, the MAX4322EUK-T lacks a dedicated SHDN pin and operates continuously - simplifying biasing in always-on sensor front-ends but excluding low-power sleep modes. Its 700µV offset and 22nV/√Hz input noise support DC-coupled, high-fidelity amplification in 12-bit ADC driver stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 5MHz - enables stable unity-gain amplification of signals up to ~3MHz with ≤1% gain error. |
| Supply Voltage Range | 2.4V to 6.5V single supply - supports direct operation from Li-ion (3.0–4.2V) or two AA cells (2.4–3.2V). |
| Quiescent Current | 650µA per amplifier - allows >1000 hours of operation on a 650mAh coin cell in continuous-sensing applications. |
| Input Offset Voltage | ±700µV (typ) - contributes ≤0.035% full-scale error in a 2V-input, 12-bit system (4096 LSB = 488µV). |
| Output Drive Capability | Drives 250Ω load to rail - ensures full 0–VCC swing into standard DAC reference buffers or analog switch drivers. |
| Input Common-Mode Range | VEE to VCC - accepts signals from ground to supply in single-supply configurations without level-shifting. |
| Slew Rate | 2V/µs - settles a 2V step in <2µs to 0.01%, suitable for multiplexed sensor readout with fast settling. |
Pinout & Package
MAX4322EUK-T is housed in a 5-pin SOT23-5 package (JEDEC MO-178AA), with 1.3mm × 2.2mm footprint and 0.95mm height - compatible with automated pick-and-place and reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier output | Delivers rail-to-rail voltage swing; requires no pull-up/down for high-impedance interfacing with ADC inputs. |
| 2 (IN−) | Inverting input | Accepts feedback network connection; input bias current ±150nA (max) minimizes resistor-induced offset. |
| 3 (IN+) | Noninverting input | Direct sensor interface point; rail-to-rail CMVR allows grounding of reference resistors without clipping. |
| 4 (VEE) | Negative supply / ground | Connected to system ground in single-supply mode; internal substrate tied to VEE for latch-up immunity. |
| 5 (VCC) | Positive supply | Accepts 2.4–6.5V; bypassing with 0.1µF ceramic + 1µF tantalum ensures stability under dynamic load. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Enables direct interfacing with 0V-referenced sensors (e.g., thermistors, bridge transducers) without level-shifting circuitry. |
| Rail-to-rail output voltage swing | Maximizes dynamic range into ADCs or comparators by delivering full 0–VCC output swing under 250Ω load. |
| No phase reversal on overdrive | Prevents output latch-up during input overvoltage events (e.g., ESD transients), ensuring robustness in unconditioned sensor paths. |
| Unity-gain stability with 500pF load | Eliminates need for isolation resistors when driving ADC sample capacitors or long PCB traces, reducing component count. |
| Low input capacitance (3pF) | Minimizes high-frequency loading on high-impedance sources (e.g., piezoelectric sensors), preserving signal integrity above 100kHz. |
Applications
| Battery-Powered Medical Sensors | Portable Data Acquisition Systems |
|---|---|
Use Scenario: Amplifying microvolt-level ECG signals from dry electrodes in wearable heart-rate monitors. IC Role / Device Role / Timing Role: Primary signal-conditioning amplifier in analog front-end, providing DC-coupled gain before 12-bit SAR ADC sampling. Use Value: 650µA supply current extends battery life to >7 days on CR2032; rail-to-rail I/O captures full baseline wander without clipping. | Use Scenario: Conditioning outputs from multi-channel thermocouple and RTD sensors in handheld calibration tools. IC Role / Device Role / Timing Role: Precision instrumentation amplifier stage with matched gain-setting resistors for <0.1°C measurement accuracy. Use Value: ±700µV offset and 22nV/√Hz noise ensure <10µV total input-referred error across -20°C to +70°C operating range. |
| Low-Voltage PA Bias Control | RSSI Signal Conditioning |
Use Scenario: Generating precise, temperature-stable bias voltage for Class-AB RF power amplifier stages in IoT gateways. IC Role / Device Role / Timing Role: Closed-loop bias controller using DAC output as reference, driving MOSFET gate with rail-to-rail swing. Use Value: 2V/µs slew rate settles bias voltage in <1µs during PA enable/disable transitions, minimizing transmit distortion. | Use Scenario: Converting logarithmic RSSI output from RF transceivers into linear-voltage representation for microcontroller ADC reading. IC Role / Device Role / Timing Role: High-linearity buffer and level-shifter between transceiver RSSI pin and 3.3V MCU input. Use Value: 5MHz bandwidth preserves fast RSSI envelope dynamics (e.g., BLE packet bursts); rail-to-rail output matches MCU input range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2462IDR | 2.7–6V supply range; 6.4MHz GBW; 550µA IQ; no shutdown; SO-8 package | Requires SO-8 layout; slightly higher GBW but lower drive strength (600Ω min load) | Select when SO-8 footprint is available and >5MHz bandwidth is required for filtering stages. |
| MCP6001T-E/OT | 1.8–6.0V supply; 1MHz GBW; 100µA IQ; rail-to-rail I/O; SOT23-5 package | Lower power and bandwidth; optimized for ultra-low-IQ sensor interfaces, not high-speed acquisition | Select for sub-100µA systems where 1MHz bandwidth suffices (e.g., slow thermistor readout). |
Compared with TLV2462IDR and MCP6001T-E/OT, the MAX4322EUK-T uniquely balances 5MHz bandwidth, 650µA IQ, rail-to-rail I/O, and SOT23-5 footprint - making it optimal for 3V-powered, medium-speed signal chains where board area and settling time are critical constraints.
Availability
MAX4322EUK-T is available at Aetrix Electronics and suitable for battery-powered medical sensors, portable data acquisition systems, and low-voltage PA bias control requiring stable component supply across industrial temperature ranges (-40°C to +85°C).
Supply support for MAX4322EUK-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 precision analog and mixed-signal ICs for demanding industrial, medical, and communications applications.
The MAX4322EUK-T belongs to the MAX432x family of rail-to-rail I/O op amps engineered for low-voltage, high-fidelity signal conditioning in space-constrained, battery-operated systems.
FAQ
What is the maximum capacitive load the MAX4322EUK-T can drive stably?
The MAX4322EUK-T is unity-gain stable with capacitive loads up to 500pF without external compensation. This enables direct connection to ADC sample capacitors or long PCB traces without isolation resistors. For loads exceeding 500pF, a series output resistor (e.g., 39Ω) restores phase margin, as verified in Figure 6 of the MAX4322EUK-T datasheet.
Does the MAX4322EUK-T have a shutdown pin?
No, the MAX4322EUK-T does not include a shutdown (SHDN) pin. Unlike the MAX4323EUT-T or MAX4327ESD, this variant operates continuously when powered. Power cycling is required to disable the amplifier - making it suitable for always-on sensor front-ends but unsuitable for duty-cycled ultra-low-power systems.
What is the input offset voltage specification for MAX4322EUK-T over temperature?
The MAX4322EUK-T has a maximum input offset voltage of ±6.0mV over the full -40°C to +85°C operating range, with a typical value of ±700µV at +25°C. Its offset voltage tempco is ±2µV/°C, meaning drift contributes ≤±0.3mV across a 150°C span - critical for precision DC-coupled measurements.
Can MAX4322EUK-T operate from dual supplies?
Yes, the MAX4322EUK-T supports dual-supply operation from ±1.2V to ±3.25V. When used with dual rails, VEE connects to the negative supply (e.g., -1.2V) and VCC to the positive supply (e.g., +1.2V), maintaining rail-to-rail input common-mode range and output swing relative to the new reference midpoint.
What package type is used for MAX4322EUK-T and is it RoHS compliant?
The MAX4322EUK-T uses a 5-pin SOT23-5 package (JEDEC MO-178AA) with lead (Pb)-free terminations and RoHS-compliant finish. The top mark "ACGE" identifies the device, and its 1.3mm × 2.2mm footprint supports high-density PCB layouts while meeting IPC/JEDEC standards for reflow soldering.
MAX4322EUK-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- 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-23-5
MAX4322EUK-T FAQ
1.How can I place an order for MAX4322EUK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4322EUK-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 MAX4322EUK-T reliable?
The price and inventory of MAX4322EUK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4322EUK-T is usually 5 days.
3.What payment methods are accepted for MAX4322EUK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4322EUK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4322EUK-T?
MAX4322EUK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4322EUK-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 MAX4322EUK-T?
For technical support, including MAX4322EUK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4322EUK-T requirements.
6.How does Aetrix verify that MAX4322EUK-T is sourced from the original manufacturer or authorized distributors?
All MAX4322EUK-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 MAX4322EUK-T meets industry standards.
7.What is the process for return or replacement of MAX4322EUK-T?
All MAX4322EUK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4322EUK-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 MAX4322EUK-T part is unused and in its original packaging.
Return procedure for MAX4322EUK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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