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Analog Devices Inc./Maxim Integrated MAX4461UEUT-T
- Part No.:
- MAX4461UEUT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
MAX4461UEUT-T.pdf
- Description:
- IC INST AMP 1 CIRCUIT SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:2,557
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Product details
Overview
MAX4461UEUT-T from Maxim Integrated is a fixed-gain, rail-to-rail output instrumentation amplifier with ground-referenced output, 100µV typical input offset voltage, ±0.1% gain accuracy at G=10, and 2.5MHz gain-bandwidth product. It operates from a single 2.85V–5.25V supply, draws only 700µA quiescent current, and features logic-controlled shutdown for ultra-low-power operation in battery-powered medical sensors and precision low-side current sensing.
For engineers reviewing the MAX4461UEUT-T datasheet, MAX4461UEUT-T pinout, MAX4461UEUT-T application, or MAX4461UEUT-T equivalent, this page delivers verified specifications, validated pin functions, real-world use cases in industrial transducer interfaces and strain-gauge amplification, and confirmed alternative parts with documented gain/feature differences.
Technical Context
The MAX4461UEUT-T implements Maxim's proprietary indirect current-feedback architecture, enabling ground-sensing capability while maintaining ultra-low 1pA typical input bias current and high common-mode rejection (90–120dB). Its internal gain-setting is factory-trimmed to 10V/V (suffix 'T'), eliminating external resistor networks and reducing layout sensitivity.
This variant integrates a dedicated SHDN pin that disables internal transconductance stages, reducing supply current to <1µA. Unlike the MAX4462, it lacks a REF pin and uses GND as its output reference-making it suitable for unipolar single-supply systems where zero-differential input yields zero output voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | Fixed 10V/V (factory-trimmed, ±0.1% accuracy at +25°C); eliminates need for external gain-setting resistors and associated layout errors. |
| Input Offset Voltage | 100µV typical (±600µV max at +25°C); enables accurate amplification of sub-100mV differential signals in strain-gauge and current-sense applications. |
| Supply Current | 700µA typical at 5V; supports long-life operation in portable medical devices and low-power industrial sensors. |
| Shutdown Current | <1µA at 5V; allows deep power-down during idle cycles without external switch control. |
| Gain-Bandwidth Product | 2.5MHz; supports stable closed-loop bandwidth up to 250kHz at G=10 for fast-response sensor conditioning. |
| Input Bias Current | 1pA typical; preserves signal integrity in high-impedance source applications like piezoresistive transducers. |
| Input Common-Mode Range | –0.1V to (VDD – 1.7V); enables true ground-sensing operation down to negative rail, critical for low-side current monitoring. |
Pinout & Package
MAX4461UEUT-T is housed in a 6-pin SOT23-6 package (JEDEC MO-178AA), with exposed pad connected to GND for thermal and noise performance. Pin 1 is OUT; Pin 2 is GND; Pin 3 is IN+; Pin 4 is IN−; Pin 5 is VDD; Pin 6 is SHDN. No internal connection on pins 4 and 5 of SO-package variants - not applicable here.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplified Output | Rail-to-rail output stage referenced to GND; delivers full swing from near 0V to VDD under light load. |
| 2 (GND) | Negative Supply / Reference | Ground reference for output and internal circuitry; must be low-impedance for CMRR and offset stability. |
| 3 (IN+) | Positive Differential Input | High-impedance MOS input (1pA bias); accepts small-signal voltages within common-mode range. |
| 4 (IN−) | Negative Differential Input | Matched high-impedance input; differential pair with IN+ defines signal path and common-mode rejection. |
| 5 (VDD) | Positive Supply | Single supply input (2.85–5.25V); powers all internal stages including shutdown logic and output buffer. |
| 6 (SHDN) | Logic-Controlled Shutdown | Active-low enable: pull to GND to enter shutdown (<1µA IDD); tie to VDD for normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed fixed gain | G=10 with ±0.1% accuracy at +25°C reduces calibration overhead and improves production yield in sensor modules. |
| Ground-sensing input stage | Accepts common-mode voltages down to –0.1V relative to GND, enabling direct low-side shunt measurement without level-shifting. |
| Rail-to-rail output | Delivers >99% of VDD–GND swing at G=10 with 200kΩ load, maximizing dynamic range in 3.3V or 5V systems. |
| Ultra-low input bias current | 1pA typical preserves signal fidelity in high-Z sources such as thermopiles, pH electrodes, and piezoresistive bridges. |
| Low-noise performance | 18nV/√Hz input-referred noise at 10kHz supports clean amplification of microvolt-level sensor outputs. |
Applications
| Industrial Process Control | Strain-Gauge Amplifiers |
|---|---|
|
Use Scenario: Monitoring pressure transducers in HVAC control panels using 3.3V microcontrollers with limited ADC resolution. IC Role / Device Role / Timing Role: Precision differential amplifier converting mV-level bridge output into full-scale 0–3.3V signal referenced to system GND. Use Value: ±0.1% gain accuracy and 100µV offset ensure <0.5% total error across temperature without software calibration. |
Use Scenario: Amplifying Wheatstone bridge output from load cells in portable weighing scales powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-power instrumentation amplifier with shutdown mode activated between weigh cycles. Use Value: 700µA operating current and <1µA shutdown current extend battery life beyond 12 months at 10-second sampling intervals. |
| Transducer Interface | Precision Low-Side Current Sense |
|
Use Scenario: Signal conditioning for MEMS-based accelerometers in condition-monitoring edge nodes deployed in factory environments. IC Role / Device Role / Timing Role: Ground-referenced front-end amplifier driving SAR ADC inputs with minimal offset drift over –40°C to +85°C. Use Value: 1.5µV/°C offset drift and 80dB CMRR at 60Hz reject motor noise and maintain linearity in electrically noisy settings. |
Use Scenario: Measuring motor phase current in BLDC drives using shunt resistors placed between load and GND. IC Role / Device Role / Timing Role: Differential amplifier rejecting common-mode voltage while amplifying µV–mV shunt drops. Use Value: –0.1V to (VDD–1.7V) input common-mode range allows direct connection to shunt without level shifters or op-amp buffers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA126UA | Fixed G=10, but higher 250µV max offset, 1.2mA supply current, no shutdown pin. | Lacks low-power shutdown; unsuitable for duty-cycled battery systems. | Choose INA126UA only if board space permits SO-8 and higher supply current is acceptable. |
| AD8221ARMZ | Adjustable gain (1–1000), 25µV max offset, 1.2mA supply, no shutdown, requires external resistors. | Requires precision external gain resistors and layout care; better for variable-gain lab equipment than fixed-gain embedded sensors. | Select AD8221ARMZ when programmable gain or lower offset is prioritized over size and power. |
Compared with INA126UA and AD8221ARMZ, the MAX4461UEUT-T offers the smallest footprint (SOT23-6), lowest quiescent current (700µA), and integrated shutdown-making it optimal for space-constrained, battery-sensitive instrumentation where fixed G=10 suffices.
Availability
MAX4461UEUT-T is available at Aetrix Electronics and suitable for industrial process control, strain-gauge amplification, and precision low-side current sensing requiring stable component supply, consistent parametric performance across temperature, and long-term manufacturability assurance.
Supply support for MAX4461UEUT-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 MAX4461UEUT-T belongs to the MAX446x family of rail-to-rail, single-supply instrumentation amplifiers engineered specifically for low-power, high-accuracy sensor signal conditioning in space- and energy-constrained systems.
FAQ
What is the gain setting of MAX4461UEUT-T and how is it configured?
The MAX4461UEUT-T has a factory-trimmed fixed gain of 10V/V (suffix 'T'), with ±0.1% accuracy at +25°C. Gain is not user-configurable-it is laser-trimmed during manufacturing and requires no external resistors. This eliminates gain-setting errors and simplifies PCB layout compared to adjustable instrumentation amplifiers like the MAX4460.
Does MAX4461UEUT-T support dual-supply operation?
No, MAX4461UEUT-T is specified only for single-supply operation from 2.85V to 5.25V. Its output is referenced to GND, and the input common-mode range extends down to –0.1V relative to GND-but it does not support negative supply rails. For dual-supply bipolar operation, consider the MAX4462HEUT-T instead.
What is the function of the SHDN pin on MAX4461UEUT-T?
The SHDN pin on MAX4461UEUT-T is an active-low logic input that disables internal transconductance and amplifier stages when pulled to GND, reducing supply current to <1µA. When driven high (≥0.7×VDD), the device operates normally. The output enters high-impedance state during shutdown, preserving system isolation.
Can MAX4461UEUT-T drive capacitive loads, and what is the maximum recommended value?
Yes, MAX4461UEUT-T can drive capacitive loads up to 100pF without sustained oscillations, as verified in the datasheet's Electrical Characteristics table. Driving larger capacitive loads may require external isolation resistance or careful stability analysis-especially in PCB traces longer than 2cm or when interfacing with ADC input capacitors.
How does the input common-mode range of MAX4461UEUT-T benefit low-side current sensing?
The MAX4461UEUT-T supports an input common-mode range from –0.1V to (VDD – 1.7V), enabling direct connection to shunt resistors placed between load and GND. This eliminates level-shifting circuitry, reduces component count, and avoids introducing offset or gain errors-critical for accurate, low-cost current monitoring in motor controllers and power supplies.
MAX4461UEUT-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- Instrumentation
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.5V/µs
- Gain Bandwidth Product:
- 2.5 MHz
- -3db Bandwidth:
- 2.5 MHz
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 800µA
- Current - Output / Channel:
- 150 mA
- Voltage - Supply Span (Min):
- 2.85 V
- Voltage - Supply Span (Max):
- 5.25 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX4461UEUT-T FAQ
1.How can I place an order for MAX4461UEUT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4461UEUT-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 MAX4461UEUT-T reliable?
The price and inventory of MAX4461UEUT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4461UEUT-T is usually 5 days.
3.What payment methods are accepted for MAX4461UEUT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4461UEUT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4461UEUT-T?
MAX4461UEUT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4461UEUT-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 MAX4461UEUT-T?
For technical support, including MAX4461UEUT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4461UEUT-T requirements.
6.How does Aetrix verify that MAX4461UEUT-T is sourced from the original manufacturer or authorized distributors?
All MAX4461UEUT-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 MAX4461UEUT-T meets industry standards.
7.What is the process for return or replacement of MAX4461UEUT-T?
All MAX4461UEUT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4461UEUT-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 MAX4461UEUT-T part is unused and in its original packaging.
Return procedure for MAX4461UEUT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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