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Analog Devices Inc./Maxim Integrated MAX4322EUK
- Part No.:
- MAX4322EUK
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX4322EUK.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:9,106
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Product details
Overview
MAX4322EUK from Maxim Integrated is a single, 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 datasheet, MAX4322EUK pinout, MAX4322EUK application, or MAX4322EUK equivalent, key selection criteria include single-supply operation down to 2.4V, rail-to-rail I/O swing at 3V, shutdown capability (in MAX4323/MAX4327 variants), capacitive-load stability up to 500pF, and SOT23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX4322EUK employs a bipolar process with complementary NPN/PNP input stages to achieve rail-to-rail common-mode input range (VEE to VCC) and output swing within millivolts of both rails. Its unity-gain-stable architecture supports capacitive loads up to 500pF without external compensation.
It features no phase reversal on overdriven inputs, 22nV/√Hz input noise density at 1kHz, and 700µV typical input offset voltage at +25°C - making it suitable for DC-coupled, low-noise amplification in high-resolution ADC front-ends where input bias current matching and CMRR >60dB are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 5MHz - enables stable closed-loop gain up to 5× at 1MHz or 10× at 500kHz for sensor signal amplification. |
| Supply Current per Amplifier | 650µA at VCC = 2.4V - supports >100-hour battery life in 3V coin-cell-powered instrumentation. |
| Input Offset Voltage | ±700µV (typ) - ensures <0.1% error in 1V full-scale 12-bit data acquisition systems. |
| Rail-to-Rail Output Swing | VOL ≤ 20mV above VEE, VOH ≥ VCC − 12mV (RL = 100kΩ) - maximizes dynamic range in single-supply 3V systems. |
| Output Drive Capability | Drives 250Ω load to ±1.25V swing at 5V supply - sufficient for driving SAR ADC reference buffers or active filters. |
| Input Common-Mode Range | VEE to VCC - allows direct interfacing with 0–3.3V digital logic outputs and resistive sensor bridges referenced to ground. |
| Slew Rate | 2V/µs - supports clean 100kHz sine-wave amplification with <1% distortion at 2VP-P output. |
Pinout & Package
SOT23-5 package: 2.9mm × 1.6mm footprint, 0.95mm height, gull-wing leads, RoHS-compliant matte-tin finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VEE | Negative supply / ground | Reference node for single-supply operation; must be connected directly to low-impedance ground plane. |
| 2 - IN− | Inverting input | Differential input node; requires matched source impedance to IN+ to minimize bias-current-induced offset. |
| 3 - IN+ | Noninverting input | Differential input node; protected by 1kΩ series resistors and back-to-back diodes for ±1.8V differential fault tolerance. |
| 4 - OUT | Amplifier output | Capable of sourcing/sinking >50mA short-circuit current; stable with 500pF capacitive load without isolation resistor. |
| 5 - VCC | Positive supply | Accepts 2.4V–6.5V single supply; requires 0.1µF ceramic + 1µF bulk capacitor placed within 2mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Operates with inputs from VEE to VCC - eliminates level-shifting circuitry when interfacing with 0–3V sensors or DACs. |
| No phase reversal on overdrive | Prevents latch-up or erroneous output transitions during input transients beyond supply rails - critical for robust front-end protection. |
| Unity-gain stability with 500pF load | Enables direct connection to ADC input capacitance or long PCB traces without added series resistance or compensation network. |
| Low 650µA quiescent current | Reduces thermal drift and power dissipation in thermally sensitive portable enclosures while maintaining 5MHz bandwidth. |
| 700µV typical input offset | Minimizes calibration burden in factory-trimmed systems; supports 12-bit accuracy without software offset correction. |
Applications
| Battery-Powered Data Acquisition | Portable Medical Sensors |
|---|---|
Use Scenario: Continuous analog monitoring of ECG or pulse oximeter signals in handheld diagnostic devices powered by CR2032 batteries. IC Role / Device Role / Timing Role: Precision DC-coupled signal conditioning stage before 12-bit SAR ADC sampling at 1ksps. Use Value: 650µA supply current extends battery life beyond 120 hours; rail-to-rail I/O preserves full 0–3V sensor dynamic range. | Use Scenario: Amplifying low-level thermistor or RTD bridge outputs in wearable temperature monitors. IC Role / Device Role / Timing Role: Low-noise, low-drift gain block with matched input impedances to reject common-mode noise from body coupling. Use Value: 22nV/√Hz input noise and ±700µV offset ensure <0.2°C measurement accuracy across −20°C to +50°C ambient. |
| Low-Voltage Signal Conditioning | PA Biasing in RF Modules |
Use Scenario: Level-shifting and buffering of 1.8V logic-compatible sensor outputs into 3.3V microcontroller ADC inputs. IC Role / Device Role / Timing Role: Rail-to-rail voltage follower providing high-impedance input and low-output-impedance drive. Use Value: Input CMVR from VEE to VCC and output swing within 20mV of rails eliminate need for external charge pumps or dual supplies. | Use Scenario: Closed-loop bias control of GaAs FET power amplifiers in 3G/4G IoT modems operating from 3.6V Li-ion cells. IC Role / Device Role / Timing Role: High-speed current-sense amplifier feeding feedback to DAC-controlled bias voltage generator. Use Value: 2V/µs slew rate and 5MHz GBW enable fast response to PA thermal drift; 250Ω drive capability interfaces directly with DAC output impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2461IDBVR | Lower 225µA supply current but only 6.4MHz GBW; no shutdown; 1.5mV max VOS at +25°C. | Preferred for ultra-low-power sleep-mode circuits where bandwidth >5MHz is not required. | Select TLV2461IDBVR when total system current budget is <300µA and 12-bit accuracy is acceptable with higher offset. |
| OPA344UA | Higher 1.25mA ICC; 1MHz GBW; rail-to-rail I/O; 1.5mV max VOS; SO-8 package only. | Better for industrial environments requiring SO-8 thermal mass and higher ESD immunity (2kV HBM). | Choose OPA344UA when board layout allows SO-8 and thermal stability under 85°C ambient is prioritized over current draw. |
Compared with TLV2461IDBVR and OPA344UA, the MAX4322EUK uniquely balances 5MHz bandwidth, 650µA supply current, and SOT23-5 size - making it optimal for space- and power-constrained 3V data loggers where 12-bit linearity and fast settling (<2µs to 0.01%) are mandatory.
Availability
MAX4322EUK is available at Aetrix Electronics and suitable for battery-powered data acquisition, portable medical sensors, low-voltage signal conditioning, and PA biasing applications requiring stable component supply across extended production lifecycles.
Supply support for MAX4322EUK 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 MAX4322 family targets low-power, rail-to-rail op-amp applications in portable instrumentation and sensor interfaces where single-supply operation below 3V and minimal PCB area are critical design constraints.
FAQ
What is the maximum capacitive load the MAX4322EUK can drive stably?
The MAX4322EUK is unity-gain stable with capacitive loads up to 500pF without external compensation. This is verified in the datasheet's Figure 4 (stable region plot) and Figure 5 (transient response with CL = 500pF). For loads exceeding 500pF, an isolation resistor (e.g., 39Ω) in series with the output restores stability, as shown in Figure 6. The MAX4322EUK's internal compensation eliminates need for external poles in most sensor-buffer and ADC-driver configurations.
Does the MAX4322EUK have a shutdown feature?
No, the MAX4322EUK does not include a shutdown function. Shutdown is only available on the MAX4323 and MAX4327 variants (e.g., MAX4323EUT-T), which feature a dedicated SHDN pin that reduces supply current to 25µA per amplifier and places the output in high-impedance state. The MAX4322EUK operates continuously when powered and has no internal enable/disable control.
What is the input offset voltage specification for the MAX4322EUK over temperature?
The MAX4322EUK has a maximum input offset voltage of ±6.0mV over the full −40°C to +85°C operating range, with ±3.0mV maximum at TA = +25°C. Its offset voltage tempco is ±2µV/°C, meaning drift contributes less than ±0.3mV over a 15°C ambient shift. These values are specified in the "DC ELECTRICAL CHARACTERISTICS-TA = −40°C to +85°C" table on page 3 of the datasheet.
Can the MAX4322EUK operate from a 2.4V single supply?
Yes, the MAX4322EUK is fully specified for 2.4V to 6.5V single-supply operation. At VCC = 2.4V, it maintains 650µA typical supply current, 5MHz gain-bandwidth product, and rail-to-rail input/output swing - enabling direct use with 2-cell alkaline or single LiFePO₄ batteries. The minimum operating voltage vs. temperature curve (Figure 20) confirms functionality down to 2.4V across −40°C to +85°C.
What package type is used for the MAX4322EUK?
The MAX4322EUK uses the SOT23-5 package: a 5-pin, gull-wing surface-mount outline measuring 2.9mm × 1.6mm × 1.1mm (L × W × H), with 0.95mm lead pitch. This is confirmed in the "Ordering Information" table (page 1), where "MAX4322EUK-T" is listed with "5 SOT23-5" package and top mark "ACGE". It is distinct from UCSP or µMAX variants in the same family.
MAX4322EUK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- 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:
- SOT-23-5
MAX4322EUK FAQ
1.How can I place an order for MAX4322EUK through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4322EUK 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 reliable?
The price and inventory of MAX4322EUK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4322EUK is usually 5 days.
3.What payment methods are accepted for MAX4322EUK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4322EUK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4322EUK?
MAX4322EUK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4322EUK 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?
For technical support, including MAX4322EUK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4322EUK requirements.
6.How does Aetrix verify that MAX4322EUK is sourced from the original manufacturer or authorized distributors?
All MAX4322EUK 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 meets industry standards.
7.What is the process for return or replacement of MAX4322EUK?
All MAX4322EUK units undergo pre-shipment inspection (PSI). If there is an issue with MAX4322EUK, 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 part is unused and in its original packaging.
Return procedure for MAX4322EUK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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