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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:3,929
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Product details
Overview
MAX4322EUK+T 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 full rail-to-rail swing into 250Ω loads - enabling precision data acquisition in portable medical sensors and handheld instrumentation.
For engineers reviewing the MAX4322EUK+T datasheet, MAX4322EUK+T pinout, MAX4322EUK+T application, or MAX4322EUK+T equivalent, this page provides verified package mapping (SOT23-5), confirmed DC/AC specs at +25°C and -40°C to +85°C, real-world output swing limits under load, shutdown behavior (not applicable to MAX4322), and validated alternatives for low-power, single-supply op amp selection.
Technical Context
The MAX4322EUK+T employs a bipolar process with dual NPN/PNP input stage to achieve rail-to-rail common-mode range (VEE to VCC) and rail-to-rail output swing (within 12mV of rails at light load). Its unity-gain-stable architecture supports capacitive loads up to 500pF without external compensation.
It operates from 2.4V to 6.5V single supply (or ±1.2V to ±3.25V dual supply), features no phase reversal on overdriven inputs, and maintains 70dB large-signal voltage gain driving 250Ω - critical for driving ADC reference buffers and sensor front-ends in space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 5MHz - enables stable closed-loop operation up to 100kHz with gain ≥50, suitable for anti-aliasing and active filter stages. |
| Quiescent Current | 650µA per amplifier at VCC = 2.4V - allows continuous operation in coin-cell–powered devices for >1 year. |
| Input Offset Voltage | ±700µV (typ) at +25°C - ensures ≤3.5mV total error in 5V-span systems without trimming. |
| Rail-to-Rail Output Swing | Within 12mV of VEE and 15mV of VCC (RL = 100kΩ); within 100mV of rails (RL = 250Ω) - maximizes dynamic range in 3V systems. |
| Common-Mode Input Range | VEE to VCC - accepts signals from ground to supply in single-supply configurations, e.g., direct connection to resistive sensor bridges. |
| Slew Rate | 2V/µs - supports 100kHz full-scale sine output with <1% distortion at 2VP-P. |
| Shutdown Function | Not supported - MAX4322EUK+T lacks SHDN pin; distinct from MAX4323/MAX4327 variants. |
Pinout & Package
MAX4322EUK+T is housed in a 5-pin SOT23-5 package (JEDEC MO-178AA), footprint-compatible with industry-standard SOT-23 layouts and reflow-process ready.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output node; capable of sourcing/sinking ±50mA short-circuit current; high-impedance state not available (no shutdown). |
| 2 | IN− | Inverting input; input bias current ±50nA (typ); protected by 1kΩ series resistors and back-to-back diodes. |
| 3 | IN+ | Noninverting input; same protection and bias current as IN−; differential input resistance 500kΩ (typ). |
| 4 | VEE | Negative supply terminal; connected to ground in single-supply mode; substrate tied to VEE per process design. |
| 5 | VCC | Positive supply terminal; requires 0.1µF ceramic + ≥1µF bulk capacitor at pin for stability; absolute max 7.5V. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full 0–VCC signal swing in 2.4V–6.5V single-supply systems, eliminating level-shifting circuitry in sensor interfaces. |
| No phase reversal | Prevents output latch-up during input overdrive - essential for robustness in transient-prone industrial sensor nodes. |
| Capacitive-load stability | Stable with up to 500pF directly at output, simplifying layout in ADC driver applications without isolation resistors. |
| Low input offset tempco | ±2µV/°C - contributes <±0.17mV drift over −40°C to +85°C, supporting uncalibrated temperature sensing front-ends. |
| Unity-gain stability | Operates stably at AV = +1 with up to 500pF load, enabling direct use in voltage-follower configurations for impedance buffering. |
Applications
| Battery-Powered Medical Sensors | Portable Data Acquisition Systems |
|---|---|
Use Scenario: Amplifying microvolt-level ECG electrode signals in handheld patient monitors powered by CR2032 cells. IC Role / Device Role / Timing Role: Primary signal-conditioning amplifier in analog front-end, providing gain, filtering, and drive capability for 16-bit SAR ADC. Use Value: 650µA supply current extends battery life beyond 18 months; rail-to-rail I/O captures full sensor dynamic range without external biasing. | Use Scenario: Signal conditioning for thermistor and RTD measurements in field-deployable environmental loggers. IC Role / Device Role / Timing Role: Precision buffer and gain stage preceding sigma-delta ADC, rejecting common-mode noise from long sensor cables. Use Value: ±700µV offset and 60dB CMRR ensure <0.1°C measurement error across 0–100°C range without calibration. |
| Low-Voltage Industrial Transmitters | RF Power Amplifier Bias Control |
Use Scenario: 4–20mA loop transmitter operating from 3.3V supply in hazardous-area IoT nodes. IC Role / Device Role / Timing Role: Voltage-to-current converter input stage, translating DAC output into precise loop current. Use Value: Rail-to-rail input accepts 0–3.3V DAC output; output swing to within 100mV of rails ensures full 4–20mA compliance voltage margin. | Use Scenario: Closed-loop bias control for GaN RF power amplifiers in 5G small-cell base stations. IC Role / Device Role / Timing Role: Error amplifier in feedback path regulating drain voltage and gate bias for thermal stability. Use Value: 5MHz GBW supports fast correction of thermal drift transients; 2V/µs slew rate prevents instability during rapid PA enable/disable cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-power, rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2461IDBVR | Higher 1.2mA ICC, 6.4MHz GBW, ±1.5mV VOS (max), no internal ESD diode protection on inputs. | Less suitable for ultra-low-power coin-cell systems; better for higher-speed 12-bit ADC drivers where offset is trimmed. | Select TLV2461IDBVR when speed >5MHz is required and supply current budget allows ≥1.2mA. |
| MCP6001UT-E/OT | Lower 100µA ICC, 1MHz GBW, ±1.5mV VOS (max), rail-to-rail output only (not input), no overvoltage input protection. | Optimized for sub-1MHz sensor buffering where power is critical but bandwidth and input range are relaxed. | Choose MCP6001UT-E/OT for cost-sensitive, sub-1MHz applications with strict <150µA current limits. |
Compared with TLV2461IDBVR and MCP6001UT-E/OT, the MAX4322EUK+T uniquely balances 5MHz bandwidth, 650µA supply current, rail-to-rail input *and* output, and integrated input protection - making it optimal for untrimmed, battery-operated precision signal chains requiring full supply-rail utilization.
Availability
MAX4322EUK+T is available at Aetrix Electronics and suitable for battery-powered medical sensors, portable data acquisition systems, and low-voltage industrial transmitters requiring stable component supply across extended 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, mixed-signal, and power-management ICs for demanding industrial, medical, and communications applications.
The MAX4322EUK+T belongs to the MAX432x family of low-power, rail-to-rail I/O op amps engineered for high-accuracy, low-voltage signal conditioning in space-constrained, battery-operated systems.
FAQ
Does MAX4322EUK+T include a shutdown pin?
No, MAX4322EUK+T does not feature a shutdown function. The SHDN pin is present only on MAX4323 and MAX4327 variants (e.g., MAX4323EUT-T). MAX4322EUK+T operates continuously when powered; power cycling is the only method to disable it. This simplifies layout but precludes dynamic power gating in duty-cycled systems.
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, as verified in the manufacturer's Typical Operating Characteristics (Figure 4). Driving >500pF requires an isolation resistor (e.g., 39Ω) in series with the output to restore phase margin, especially when sourcing into long PCB traces or ADC input capacitance.
Can MAX4322EUK+T operate from a 2.4V single supply?
Yes, MAX4322EUK+T is fully specified for 2.4V to 6.5V single-supply operation. At 2.4V, it delivers 650µA quiescent current, 5MHz GBW, and rail-to-rail I/O performance - enabling direct interface with 2.4V logic and low-voltage sensors without level shifters or charge pumps.
Is the input stage of MAX4322EUK+T protected against overvoltage?
Yes, MAX4322EUK+T includes robust input protection: 1kΩ series resistors plus back-to-back triple diodes between IN+ and IN− (Figure 2). This limits differential input fault current and clamps voltages to ±1.8V, allowing safe operation with ±5V transients in industrial environments when external series resistors are added.
What is the typical output voltage swing of MAX4322EUK+T into a 250Ω load?
At VCC = 5V and TA = +25°C, MAX4322EUK+T delivers a minimum output swing of VEE + 100mV and a maximum of VCC − 100mV into 250Ω (per DC Electrical Characteristics table). This 4.8V span preserves >96% of full-scale range for 12-bit ADC interfacing without gain compression.
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:
- 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:
- -
- 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.
MAX4322EUK+T Tags
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