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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 SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,130
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Product details
Overview
The MAX4461UEUT+T from Maxim Integrated is a precision rail-to-rail output instrumentation amplifier with fixed gains of 1, 10, or 100 (U = gain 1), ground-referenced output, logic-controlled shutdown, and ultra-low input bias current (1 pA typ). It operates from a single 2.85V–5.25V supply, draws only 700 µA quiescent current, and delivers 2.5 MHz gain-bandwidth product-ideal for low-power strain-gauge and transducer interface applications.
For engineers reviewing the MAX4461UEUT+T datasheet, MAX4461UEUT+T pinout, MAX4461UEUT+T application, or MAX4461UEUT+T equivalent, this page provides verified circuit role, package mapping, pin-level design meaning, temperature-stable gain error (±0.1% typ at +25°C), input offset voltage (100 µV typ), and real-world application constraints for battery-powered medical and industrial sensing systems.
Technical Context
The MAX4461UEUT+T uses Maxim's proprietary indirect current-feedback architecture to achieve ground-sensing capability while maintaining ultra-high input impedance (>2 GΩ) and enhanced common-mode rejection (120 dB typ). Its input stage converts differential voltage to current, enabling precise amplification of small-signal inputs without loading high-impedance sources.
This device implements factory-trimmed fixed gain (G = 1 for U-suffix), internal ground-referenced output, and a dedicated SHDN pin that reduces supply current to <1 µA when pulled low. It supports single-supply operation only and does not include a REF pin-distinguishing it from the MAX4462 family.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | Fixed 1 V/V (U-suffix); enables unity-gain buffering of differential signals without external resistors. |
| Input Offset Voltage | 100 µV typical; ensures ≤0.1% measurement error for 100 mV full-scale differential input. |
| Gain-Bandwidth Product | 2.5 MHz; supports stable amplification up to ~2.5 kHz at G = 1 with 0.1% gain accuracy. |
| Supply Current | 700 µA typical at 5 V; enables multi-year battery life in portable medical sensors. |
| Input Bias Current | 1 pA typical; preserves signal integrity in high-impedance bridge and piezoresistive sensor interfaces. |
| Common-Mode Rejection | 120 dB typical; rejects noise from shared ground paths in industrial PLC analog input modules. |
| Operating Supply Range | 2.85 V to 5.25 V single supply; compatible with Li-ion, 3.3 V, and 5 V system rails without level-shifting. |
Pinout & Package
MAX4461UEUT+T is housed in a 6-pin SOT23-6 package (JEDEC MO-178AA), with exposed pad (EP) 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.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplified Output | Rail-to-rail voltage output referenced to GND; drives 200 kΩ load with <0.25 mV error at 5 V supply. |
| 2 (GND) | Negative Supply Reference | Ground return for all internal circuitry and output reference; must be low-impedance for CMRR integrity. |
| 3 (IN+) | Positive Differential Input | High-impedance MOS input (1 pA bias); accepts signals within –0.1 V to (VDD – 1.7 V) common-mode range. |
| 4 (IN−) | Negative Differential Input | Matched high-impedance input; differential pair with IN+ defines signal path; no internal connection to pins 4/5 in SO package. |
| 5 (VDD) | Positive Supply | Single 2.85–5.25 V rail; powers all internal stages; PSRR >80 dB minimizes supply noise coupling. |
| 6 (SHDN) | Shutdown Control | CMOS-compatible logic input; pull low (<0.3×VDD) to enter sub-1 µA shutdown; pull high (>0.7×VDD) for active mode. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 1 pA typical enables direct connection to >100 MΩ sensor sources without signal loss or drift. |
| Factory-trimmed gain accuracy | ±0.1% typical at +25°C ensures calibrated gain without post-manufacture trimming in production test. |
| Rail-to-rail output swing | Drives to within 0.25 mV of GND and VDD at light loads-maximizes dynamic range in 3.3 V systems. |
| Low-noise performance | 18 nV/√Hz input-referred noise at 10 kHz supports microvolt-level strain-gauge resolution. |
| Logic-controlled shutdown | Reduces supply current to <1 µA and places output in high-Z state-enables power-gating in duty-cycled sensors. |
Applications
| Industrial Process Control | Strain-Gauge Amplifiers |
|---|---|
Use Scenario: Amplifying low-level differential outputs from 350 Ω Wheatstone bridges in pressure transmitters operating on 3.3 V battery power. IC Role / Device Role / Timing Role: Precision instrumentation amplifier providing G = 1 buffering with ground-referenced output and shutdown control for sleep/wake cycles. Use Value: 100 µV offset and 1 pA bias current prevent zero-point drift and preserve bridge balance accuracy over temperature. |
Use Scenario: Signal conditioning for bonded foil strain gauges in handheld torque wrenches with intermittent measurement duty cycle. IC Role / Device Role / Timing Role: Low-power, rail-to-rail I/O instrumentation amplifier with logic-controlled shutdown to extend battery life. Use Value: 700 µA quiescent current and <1 µA shutdown current enable >2-year operation on a single CR2032 cell. |
| Transducer Interface | Precision Low-Side Current Sense |
Use Scenario: Interfacing piezoresistive accelerometers in industrial vibration monitors requiring high CMRR in noisy EMI environments. IC Role / Device Role / Timing Role: Ground-sensing instrumentation amplifier rejecting common-mode noise from motor drive grounds. Use Value: 120 dB CMRR and 80 dB PSRR suppress interference from adjacent 4–20 mA loops and switching regulators. |
Use Scenario: Amplifying mV-level shunt voltage in battery management systems where sense node is referenced to system ground. IC Role / Device Role / Timing Role: Unity-gain differential amplifier with matched inputs and ultra-low offset for accurate current reconstruction. Use Value: ±0.1% gain error and 100 µV offset ensure <0.2% total current measurement error across 0–10 A range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA333AIDBVR | Fixed G = 1, 50 µV max offset, 50 µA supply current, no shutdown pin | Lacks logic-controlled shutdown; lower power but no active power gating | Select for ultra-low-power always-on monitoring where shutdown is unnecessary |
| AD8220ARMZ | Fixed G = 10, 250 µV max offset, 900 µA supply current, no shutdown | Higher gain and offset; requires external gain scaling for unity-gain use cases | Select when higher gain is acceptable and board space allows SOIC-8 footprint |
Compared with the MAX4461UEUT+T, the INA333AIDBVR offers lower quiescent current but no shutdown control, while the AD8220ARMZ provides higher gain and SOIC packaging at the cost of reduced offset accuracy and no power-down capability-making the MAX4461UEUT+T optimal for compact, battery-operated G = 1 sensing with deterministic power cycling.
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, long-term lifecycle support, and guaranteed lead-free compliance.
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 high-performance analog and mixed-signal ICs for demanding industrial, medical, and communications applications.
The MAX4461UEUT+T belongs to Maxim's precision instrumentation amplifier product line, engineered specifically for low-power, high-accuracy differential signal conditioning in space-constrained, battery-operated sensing systems.
FAQ
What is the maximum operating temperature range for the MAX4461UEUT+T?
The MAX4461UEUT+T is specified for continuous operation from –40°C to +85°C ambient temperature. Electrical parameters-including gain error (±3.0% max), input offset voltage (±1900 µV max), and CMRR (80 dB min)-are guaranteed across this full industrial temperature range, making it suitable for deployment in harsh factory-floor or outdoor equipment environments.
Does the MAX4461UEUT+T support dual-supply operation?
No, the MAX4461UEUT+T is designed exclusively for single-supply operation from 2.85 V to 5.25 V. Unlike the MAX4462 variant, it lacks a REF pin and internal circuitry for bipolar referencing; its output is fixed to ground, and VSS is internally tied to GND. Dual-supply use would violate absolute maximum ratings and is not supported.
What is the purpose of the SHDN pin on the MAX4461UEUT+T?
The SHDN pin on the MAX4461UEUT+T enables hardware-controlled power-down: pulling SHDN low (<0.3 × VDD) disables internal transconductance and amplifier blocks, reducing supply current to <1 µA. During shutdown, the output enters high-impedance state (>100 kΩ), preserving signal integrity on shared buses and extending battery life in duty-cycled sensor nodes.
Can the MAX4461UEUT+T be used with gain settings other than 1?
No-the 'U' suffix in MAX4461UEUT+T explicitly denotes factory-trimmed fixed gain of 1 V/V. The MAX4461 family offers 'T' (G = 10) and 'H' (G = 100) variants; gain cannot be adjusted externally. For variable gain, consider the MAX4460 (adjustable via FB pin) or discrete op-amp-based instrumentation topologies.
Is the MAX4461UEUT+T RoHS-compliant and lead-free?
Yes, the MAX4461UEUT+T is a lead-free, RoHS-compliant device. The '+T' suffix indicates tape-and-reel packaging with lead-free (Pb-free) finish per JEDEC J-STD-609. The exposed pad (EP) in the SOT23-6 package is designed to be soldered to a GND plane for thermal and EMI performance, consistent with IPC-7095 guidelines for lead-free assembly.
MAX4461UEUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- -
- 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-23-6
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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