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Analog Devices Inc./Maxim Integrated MAX4461TEUT
- Part No.:
- MAX4461TEUT
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
MAX4461TEUT.pdf
- Description:
- IC INST AMP 1 CIRCUIT SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,404
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Product details
Overview
The MAX4461TEUT from Maxim Integrated is a precision rail-to-rail output instrumentation amplifier with fixed gain of 10 V/V, ground-referenced output, and logic-controlled shutdown. It delivers ±0.1% gain accuracy, 100 µV input offset voltage, 1pA input bias current, and 2.5 MHz gain-bandwidth product while operating from a single 2.85V–5.25V supply and drawing only 700 µA quiescent current. It is used in low-side current sensing and strain-gauge signal conditioning where high CMRR and low power are critical.
For engineers reviewing the MAX4461TEUT datasheet, MAX4461TEUT pinout, MAX4461TEUT application, or MAX4461TEUT equivalent, this page provides verified technical context, validated pin functions, real-world application mappings, and confirmed alternative parts for unipolar, single-supply instrumentation amplifier designs requiring <1 µA shutdown current and factory-trimmed 10× gain.
Technical Context
The MAX4461TEUT implements Maxim's proprietary indirect current-feedback architecture, enabling ground-sensing capability without sacrificing ultra-low input bias current (1 pA typ) or common-mode rejection (90–120 dB). Its transconductance-based signal path avoids traditional three-op-amp limitations, delivering stable performance across its full input common-mode range (–0.1 V to VDD – 1.7 V).
This variant is factory trimmed to G = 10 V/V (suffix 'T'), features a dedicated SHDN pin for sub-1 µA shutdown current, and uses internal ground referencing-eliminating external reference components required by bipolar-output variants like the MAX4462. Its rail-to-rail output swing is optimized for 20 kΩ loads and maintains ≤0.35% gain error over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | Fixed 10 V/V - eliminates external gain-setting resistors and associated tolerance/temperature drift. |
| Input Offset Voltage | ±100 µV (typ) - enables accurate amplification of mV-level differential signals without nulling circuitry. |
| Gain Accuracy | ±0.1% (25°C) - ensures predictable system-level gain without calibration in production test. |
| Supply Current | 700 µA (typ at 5 V) - supports battery-powered medical and portable industrial sensors. |
| Shutdown Current | <1 µA (typ) - allows periodic wake-up sampling with minimal energy penalty. |
| Gain-Bandwidth Product | 2.5 MHz - supports bandwidths up to 250 kHz at G = 10 for fast transient response in control loops. |
| Input Bias Current | 1 pA (typ) - preserves signal integrity when interfacing high-impedance sources like piezoresistive bridges. |
Pinout & Package
MAX4461TEUT is housed in a 6-pin SOT23 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.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplified Output | Rail-to-rail voltage output referenced to GND; drives 20 kΩ minimum load with ≤0.25 mV VOL. |
| 2 (GND) | Negative Supply / Reference | Ground reference for input common-mode range, output swing, and shutdown logic threshold. |
| 3 (IN+) | Positive Differential Input | High-impedance MOS input (2 GΩ) accepting small-signal voltages within –0.1 V to VDD – 1.7 V. |
| 4 (IN−) | Negative Differential Input | Matched high-impedance input; differential pair enables >90 dB CMRR even near supply rails. |
| 5 (VDD) | Positive Supply | Accepts 2.85–5.25 V single supply; PSRR ≥75 dB ensures immunity to supply ripple. |
| 6 (SHDN) | Logic-Controlled Shutdown | Active-low input: pull to GND to reduce supply current to <1 µA; high-Z output during shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-Trimmed Gain | G = 10 V/V with ±0.1% accuracy at 25°C - removes design uncertainty and board space for gain resistors. |
| Ultra-Low Input Bias Current | 1 pA typical - prevents loading errors in high-Z bridge and sensor interfaces. |
| Ground-Sensing Input Stage | Operates with inputs down to –0.1 V relative to GND - enables true low-side current sensing without level-shifting. |
| Rail-to-Rail Output | Swings within 0.25 mV of GND and within 4 mV of VDD at 20 kΩ - maximizes dynamic range in low-voltage systems. |
| Low-Power Shutdown | Reduces supply current to <1 µA while maintaining high-Z output - ideal for duty-cycled measurement systems. |
Applications
| Industrial Process Control | Strain-Gauge Amplifiers |
|---|---|
|
Use Scenario: Amplifying millivolt-level differential outputs from 4-wire load cells in PLC analog input modules. IC Role / Device Role / Timing Role: Precision instrumentation amplifier providing fixed 10× gain, rejecting common-mode noise from long sensor cables. Use Value: Eliminates need for external gain resistors and trimming, reducing BOM count and calibration time while maintaining ±0.1% gain accuracy over temperature. |
Use Scenario: Signal conditioning for quarter-bridge strain gauges mounted on structural monitoring beams. IC Role / Device Role / Timing Role: Low-noise, high-CMRR amplifier converting microstrain-induced ΔV into robust single-ended output for ADC input. Use Value: 1 pA input bias current prevents gauge imbalance errors; rail-to-rail output fully utilizes 12-bit ADC range under 3.3 V supply. |
| Precision Low-Side Current Sense | Battery-Powered Medical Equipment |
|
Use Scenario: Measuring motor phase current in portable power tools using shunt resistor placed between load and GND. IC Role / Device Role / Timing Role: Ground-referenced instrumentation amplifier rejecting PWM switching noise while amplifying 10–100 mV shunt voltage. Use Value: Input common-mode range extends to –0.1 V enables accurate zero-current detection; 700 µA quiescent current extends runtime. |
Use Scenario: Amplifying ECG electrode signals in handheld patient monitors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-power, low-noise front-end amplifier with shutdown mode synchronized to ECG acquisition bursts. Use Value: Sub-1 µA shutdown current reduces average power; 18 nV/√Hz input noise preserves diagnostic signal fidelity at 0.05–150 Hz band. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA126PA | Fixed G = 10, but higher 250 µV max offset, 500 µA supply current, no shutdown pin. | Lacks logic-controlled shutdown and ground-sensing capability below GND; requires dual supply for negative input extension. | Select when cost sensitivity outweighs shutdown requirement and offset budget allows 2.5× degradation. |
| AD8221ARMZ | Adjustable gain (1–1000), 25 µV max offset, 1.1 mA supply current, no shutdown. | Requires external gain resistors; superior offset but higher power and no low-power sleep mode. | Select when variable gain is needed and system can accommodate higher quiescent current and resistor layout. |
Compared with INA126PA and AD8221ARMZ, the MAX4461TEUT uniquely combines factory-trimmed 10× gain, sub-1 µA shutdown, ground-sensing inputs, and 1 pA bias current in a 6-pin SOT23-making it optimal for compact, battery-constrained, unipolar-sensing applications where gain stability and ultra-low standby power are mandatory.
Availability
MAX4461TEUT is available at Aetrix Electronics and suitable for industrial process control, precision current sensing, and portable medical equipment requiring stable component supply, guaranteed long-term availability, and traceable sourcing.
Supply support for MAX4461TEUT 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 MAX4461TEUT belongs to Maxim's rail-to-rail instrumentation amplifier family, engineered specifically for low-power, single-supply sensor signal conditioning where ground-referenced operation, factory-trimmed gain, and ultra-low input bias current are essential.
FAQ
What is the gain configuration of the MAX4461TEUT?
The MAX4461TEUT is factory trimmed to a fixed gain of 10 V/V (suffix 'T'), eliminating the need for external gain-setting resistors. This configuration ensures ±0.1% gain accuracy at +25°C and ≤0.35% over the full –40°C to +85°C temperature range, making MAX4461TEUT ideal for applications requiring repeatable, calibration-free amplification.
Does the MAX4461TEUT support dual-supply operation?
No, the MAX4461TEUT is designed exclusively for single-supply operation from 2.85 V to 5.25 V. Its input common-mode range extends to –0.1 V relative to GND and up to VDD – 1.7 V, enabling true ground-sensing functionality. For dual-supply use, consider the MAX4462 series instead, which includes a dedicated REF pin.
What is the function of the SHDN pin on the MAX4461TEUT?
The SHDN pin on the MAX4461TEUT is an active-low logic input that places the device into ultra-low-power shutdown mode when pulled to GND, reducing supply current to less than 1 µA. During shutdown, the output becomes high-impedance. Drive SHDN high (≥0.7 × VDD) or connect to VDD for normal operation.
Can the MAX4461TEUT be used for bipolar input signals?
The MAX4461TEUT is optimized for unipolar operation with ground-referenced output and input common-mode range extending slightly below GND (–0.1 V). It does not support true bipolar output swing. For bipolar signal handling (e.g., ±100 mV inputs), the MAX4462TEUT-with its REF pin-is the appropriate variant.
What package type is used for the MAX4461TEUT?
The MAX4461TEUT is supplied in a 6-pin SOT23-6 package (JEDEC MO-178AA) with top mark 'AASU'. This compact surface-mount package measures 2.9 mm × 1.6 mm × 1.1 mm and includes an exposed thermal pad connected to GND for improved thermal performance and noise immunity.
MAX4461TEUT 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:
- 250 kHz
- 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
MAX4461TEUT FAQ
1.How can I place an order for MAX4461TEUT through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4461TEUT 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 MAX4461TEUT reliable?
The price and inventory of MAX4461TEUT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4461TEUT is usually 5 days.
3.What payment methods are accepted for MAX4461TEUT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4461TEUT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4461TEUT?
MAX4461TEUT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4461TEUT 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 MAX4461TEUT?
For technical support, including MAX4461TEUT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4461TEUT requirements.
6.How does Aetrix verify that MAX4461TEUT is sourced from the original manufacturer or authorized distributors?
All MAX4461TEUT 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 MAX4461TEUT meets industry standards.
7.What is the process for return or replacement of MAX4461TEUT?
All MAX4461TEUT units undergo pre-shipment inspection (PSI). If there is an issue with MAX4461TEUT, 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 MAX4461TEUT part is unused and in its original packaging.
Return procedure for MAX4461TEUT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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