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Analog Devices Inc./Maxim Integrated MAX4461TEUT-T
- Part No.:
- MAX4461TEUT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
MAX4461TEUT-T.pdf
- Description:
- IC INST AMP 1 CIRCUIT SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:4,340
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Product details
Overview
The MAX4461TEUT-T 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 typical input offset voltage, 1pA typical input bias current, and 2.5 MHz gain-bandwidth product while operating from a single 2.85V–5.25V supply. It is optimized for low-side current sensing and strain-gauge signal conditioning in battery-powered industrial sensors.
For engineers reviewing the MAX4461TEUT-T datasheet, MAX4461TEUT-T pinout, MAX4461TEUT-T application, or MAX4461TEUT-T equivalent, key selection criteria include its factory-trimmed G=10 accuracy, shutdown current <1 µA, rail-to-rail output swing, input common-mode range extending to –0.1 V (ground-sensing), and compatibility with space-constrained SOT23-6 layouts.
Technical Context
The MAX4461TEUT-T implements Maxim's proprietary indirect current-feedback architecture, enabling high common-mode rejection (90–120 dB) and ultra-low input bias current (1 pA typ) without sacrificing bandwidth. Its ground-sensing input stage supports differential measurements referenced to system ground, eliminating need for level-shifting circuitry in unipolar single-supply systems.
This variant integrates a dedicated SHDN pin that disables internal transconductance stages, reducing quiescent current to <1 µA while placing the output in high-impedance state. Gain is fixed at 10 V/V via on-die laser trimming (suffix 'T'), ensuring ±0.1% initial error across temperature and supply variations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | Fixed 10 V/V, factory-trimmed to ±0.1% accuracy - eliminates external resistor matching and drift concerns. |
| Input Offset Voltage | 100 µV typical (±600 µV max at +25°C) - enables accurate amplification of mV-level sensor signals. |
| Input Bias Current | 1 pA typical - preserves signal integrity in high-impedance bridge and piezoresistive sensor interfaces. |
| Supply Current | 700 µA typical at 5 V - supports always-on monitoring in energy-sensitive portable equipment. |
| Shutdown Current | <1 µA at 5 V - allows deep power-down between measurement cycles in battery-operated data loggers. |
| Gain-Bandwidth Product | 2.5 MHz - supports stable closed-loop operation up to ~250 kHz at G=10 for dynamic sensor signals. |
| Input Common-Mode Range | –0.1 V to (VDD – 1.7 V) - enables true ground-sensing operation, critical for low-side current shunt amplification. |
Pinout & Package
MAX4461TEUT-T is housed in a 6-pin SOT23-6 package (JEDEC MO-178AA), with exposed pad connected to GND for thermal enhancement. 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 output stage drives loads down to 20 kΩ; referenced to GND for unipolar operation. |
| 2 (GND) | Negative Supply / Reference | Ground-sensing reference node; connects to system ground and exposed pad for thermal stability. |
| 3 (IN+) | Positive Differential Input | High-impedance MOS input (2 GΩ); accepts small differential voltages within common-mode range. |
| 4 (IN−) | Negative Differential Input | Matched to IN+; forms precision differential pair for rejecting common-mode noise in noisy environments. |
| 5 (VDD) | Positive Supply | Accepts 2.85–5.25 V single supply; PSRR >80 dB ensures immunity to supply ripple. |
| 6 (SHDN) | Shutdown Control | CMOS-compatible input; driven high for active mode, low for <1 µA shutdown - no external pull-up required. |
Key Features
| Feature | Design Value |
|---|---|
| Ground-sensing input | Enables direct connection to low-side current shunts without level-shifting components or dual supplies. |
| Factory-trimmed G=10 | Eliminates gain-setting resistors and associated tolerance/temperature drift; reduces BOM count and layout area. |
| 1 pA input bias current | Preserves accuracy in high-Z transducer interfaces (e.g., strain gauges, piezoelectric sensors) without loading errors. |
| Rail-to-rail output | Maximizes dynamic range in 3.3 V or 5 V systems; delivers full-scale output from near-GND to near-VDD. |
| Logic-controlled shutdown | Reduces system standby power by >99.9%; output enters high-Z state, preventing back-driving of downstream circuits. |
Applications
| Strain-Gauge Amplifier | Precision Low-Side Current Sense |
|---|---|
|
Use Scenario: Amplifying microvolt-level differential outputs from quarter-bridge or full-bridge strain gauges in load cells and pressure sensors. IC Role / Device Role / Timing Role: Precision instrumentation amplifier providing fixed 10× gain, ground-referenced output, and high CMRR to reject bridge excitation noise. Use Value: Delivers ±0.1% gain accuracy and 100 µV offset to resolve sub-0.05% full-scale strain changes without calibration. |
Use Scenario: Measuring bidirectional or unidirectional current through a low-value shunt resistor placed between load and ground. IC Role / Device Role / Timing Role: Ground-sensing instrumentation amplifier rejecting common-mode voltage while amplifying mV-level shunt voltage. Use Value: Enables accurate current measurement down to 10 mA (with 100 mΩ shunt) using only a single supply and no level shifters. |
| Industrial Process Control | Battery-Powered Medical Equipment |
|
Use Scenario: Signal conditioning for 4–20 mA loop-powered transmitters and analog sensor inputs in PLC I/O modules. IC Role / Device Role / Timing Role: Low-power, precision amplifier interfacing RTDs, thermocouples, or potentiometric sensors to ADC front-ends. Use Value: 700 µA supply current and shutdown mode extend battery life in wireless field transmitters; rail-to-rail output maximizes ADC utilization. |
Use Scenario: Amplifying ECG, EEG, or pulse oximeter sensor signals in portable diagnostic devices powered by coin-cell or Li-ion batteries. IC Role / Device Role / Timing Role: Ultra-low-input-current amplifier preserving weak bio-potential signals while minimizing power draw. Use Value: 1 pA input bias current prevents electrode polarization; <1 µA shutdown extends device runtime between charges. |
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=5 or G=10 via external resistor; higher 250 µV max offset; 1.2 mA supply current. | Lacks integrated shutdown; requires external gain resistor; less suitable for ultra-low-power designs. | Choose INA126PA if board already uses SO-8 footprint and higher supply current is acceptable. |
| AD8221ARMZ | G=1–1000 via single resistor; 25 µV max offset; 1.2 mA supply current; no shutdown. | Higher precision but larger package (MSOP-8); no power-down capability; requires external gain setting. | Choose AD8221ARMZ when sub-50 µV offset is mandatory and shutdown is not required. |
Compared with MAX4461TEUT-T, INA126PA offers lower cost but higher power and less integration, while AD8221ARMZ provides superior DC accuracy at the expense of size, power, and lack of shutdown-making MAX4461TEUT-T optimal for compact, battery-aware industrial sensing.
Availability
MAX4461TEUT-T is available at Aetrix Electronics and suitable for industrial process control, precision low-side current sense, and battery-powered medical equipment requiring stable component supply and long-term production continuity.
Supply support for MAX4461TEUT-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, automotive, and communications applications.
The MAX4461TEUT-T belongs to the MAX4460/MAX4461/MAX4462 family of rail-to-rail instrumentation amplifiers engineered for precision, low-power, ground-sensing signal conditioning in space-constrained, single-supply systems.
FAQ
What is the gain configuration of the MAX4461TEUT-T?
The MAX4461TEUT-T has a fixed gain of 10 V/V, factory-laser-trimmed to ±0.1% accuracy. Unlike adjustable variants such as the MAX4460, it requires no external resistors for gain setting. This ensures stable, drift-free performance over temperature and time, making MAX4461TEUT-T ideal for calibrated sensor interfaces where gain consistency is critical.
Does the MAX4461TEUT-T support dual-supply operation?
No, the MAX4461TEUT-T is specified only for single-supply operation from 2.85 V to 5.25 V. Its output is internally referenced to GND, and its input common-mode range extends to –0.1 V (ground-sensing), but it lacks a negative supply pin (VSS). For dual-supply applications requiring bipolar output swing, consider the MAX4462TEUT-T instead.
How does the shutdown feature of the MAX4461TEUT-T behave electrically?
When the SHDN pin of the MAX4461TEUT-T is pulled low, internal transconductance stages disable, reducing supply current to <1 µA. The output enters a high-impedance state (>100 kΩ), and the amplifier ceases amplification. Driving SHDN high (≥0.7 × VDD) restores normal operation. No external pull-up is required due to CMOS input structure.
Can the MAX4461TEUT-T be used with a 3.3 V supply?
Yes, the MAX4461TEUT-T operates fully specified from 2.85 V to 5.25 V, including standard 3.3 V rails. At 3.3 V, it maintains 700 µA typical supply current, rail-to-rail output swing (within 25 mV of rails), and retains all key specs including ±0.1% gain accuracy and 100 µV offset - making MAX4461TEUT-T well-suited for modern low-voltage embedded systems.
What is the maximum capacitive load the MAX4461TEUT-T can drive stably?
The MAX4461TEUT-T is stable driving up to 100 pF capacitive load without sustained oscillations, as verified in the datasheet. For loads exceeding 100 pF, an external series resistor (e.g., 10–50 Ω) should be added close to the output pin to isolate capacitance and preserve phase margin. This limitation applies regardless of gain setting, since the MAX4461TEUT-T is fixed at G=10.
MAX4461TEUT-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:
- 250 kHz
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 50 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
MAX4461TEUT-T FAQ
1.How can I place an order for MAX4461TEUT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4461TEUT-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 MAX4461TEUT-T reliable?
The price and inventory of MAX4461TEUT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4461TEUT-T is usually 5 days.
3.What payment methods are accepted for MAX4461TEUT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4461TEUT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4461TEUT-T?
MAX4461TEUT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4461TEUT-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 MAX4461TEUT-T?
For technical support, including MAX4461TEUT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4461TEUT-T requirements.
6.How does Aetrix verify that MAX4461TEUT-T is sourced from the original manufacturer or authorized distributors?
All MAX4461TEUT-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 MAX4461TEUT-T meets industry standards.
7.What is the process for return or replacement of MAX4461TEUT-T?
All MAX4461TEUT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4461TEUT-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 MAX4461TEUT-T part is unused and in its original packaging.
Return procedure for MAX4461TEUT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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