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Analog Devices Inc./Maxim Integrated MAX4461TETT+T
- Part No.:
- MAX4461TETT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
MAX4461TETT+T.pdf
- Description:
- IC OPAMP INSTR 2.5MHZ RRO 6TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,931
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Product details
Overview
The MAX4461TETT+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 operates from a single 2.85V–5.25V supply, draws only 700µA quiescent current (≤1µA in shutdown), and delivers ±0.1% gain accuracy with 100µV typical input offset voltage. It is used in low-side current sensing and strain-gauge signal conditioning where space-constrained, battery-powered precision amplification is required.
For engineers reviewing the MAX4461TETT+T datasheet, MAX4461TETT+T pinout, MAX4461TETT+T application, or MAX4461TETT+T equivalent, key selection criteria include its 10 V/V factory-trimmed gain, TDFN-EP 6-pin package, shutdown control interface, ground-sensing input capability, and 2.5MHz gain-bandwidth product for high-fidelity small-signal amplification.
Technical Context
The MAX4461TETT+T implements Maxim's proprietary indirect current-feedback architecture, enabling ground-sensing operation while maintaining ultra-low 1pA typical input bias current and high common-mode rejection (90–120dB). Its internal transconductance stages convert differential input voltage to current and feed a loop amplifier with class-AB output stage, minimizing gain error and offset drift.
This device is factory trimmed for 10 V/V gain (suffix 'T'), referenced to ground at the output, and features a dedicated SHDN pin that disables internal circuitry to reduce supply current below 1µA. It supports input common-mode range from –0.1V to (VDD – 1.7V) and delivers rail-to-rail output swing into 200kΩ loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | Fixed 10 V/V - eliminates external resistor network, ensures stable gain without layout sensitivity. |
| Input Offset Voltage | ±100 µV (typ) - enables accurate amplification of mV-level sensor signals without significant DC error. |
| Gain-Bandwidth Product | 2.5 MHz - supports bandwidth up to 250 kHz at G = 10, suitable for dynamic strain or current measurements. |
| Supply Current | 700 µA (typ) - allows continuous operation in multi-year battery-powered medical or industrial sensors. |
| Shutdown Current | <1 µA - enables ultra-low-power sleep modes in duty-cycled data acquisition systems. |
| Input Bias Current | 1 pA (typ) - preserves signal integrity from high-impedance sources like piezoresistive bridges or pH electrodes. |
| CMRR | 90–120 dB - rejects noise from shared ground paths in motor drives or industrial I/O modules. |
Pinout & Package
MAX4461TETT+T is housed in a 6-pin TDFN-EP (exposed paddle) package, measuring 2.0mm × 2.0mm × 0.75mm, with thermal pad connected to GND for enhanced power dissipation and noise immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplified Output | Rail-to-rail voltage output referenced to GND; drives ADC inputs or analog filters directly. |
| 2 (GND) | Negative Supply / Reference | Ground reference for both input common-mode and output swing; exposed paddle must be soldered to PCB GND plane. |
| 3 (IN+) | Positive Differential Input | High-impedance MOS input accepting small-signal voltages; optimized for bridge sensor top-side connection. |
| 4 (IN−) | Negative Differential Input | High-impedance MOS input; paired with IN+ to reject common-mode interference in noisy environments. |
| 5 (VDD) | Positive Supply | Accepts 2.85V–5.25V single supply; bypass capacitor (0.1µF) required near pin for stability. |
| 6 (SHDN) | Shutdown Control | Logic-input pin: driven high (≥0.7×VDD) for active mode, low (≤0.3×VDD) for sub-µA shutdown state. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 10 V/V gain | Eliminates external gain-setting resistors, reduces board area, and guarantees ±0.1% initial accuracy over temperature. |
| Ground-sensing input architecture | Allows direct connection to low-side shunt resistors or bridge outputs referenced to system ground-no level-shifting needed. |
| 1 pA typical input bias current | Preserves signal fidelity from megohm-range sources (e.g., thermopiles, piezoelectric sensors) without loading-induced error. |
| Rail-to-rail output swing | Delivers full dynamic range into 200kΩ loads, maximizing SNR when interfacing with 12-bit+ SAR ADCs. |
| 2.5 MHz gain-bandwidth product | Enables accurate amplification of fast-changing sensor outputs (e.g., vibration, pulse oximetry) with minimal phase lag. |
Applications
| Industrial Process Control | Strain-Gauge Amplifiers |
|---|---|
Use Scenario: Monitoring pressure transducers in programmable logic controller (PLC) analog input modules under 24V DC field wiring conditions. IC Role / Device Role / Timing Role: Precision front-end amplifier converting mV-level bridge output to 0–5V range for 16-bit ADC digitization. Use Value: 90–120 dB CMRR suppresses 50/60Hz pickup from adjacent AC cables; shutdown mode enables channel multiplexing with <1µA leakage. | Use Scenario: Signal conditioning for quarter-bridge load cells in portable torque wrenches powered by coin-cell batteries. IC Role / Device Role / Timing Role: Fixed-gain instrumentation amplifier providing stable 10× amplification of microstrain-induced differential voltage. Use Value: 1pA input bias current prevents zero-drift due to high-resistance bridge elements; 700µA supply current extends battery life beyond 2 years. |
| Precision Low-Side Current Sense | Battery-Powered Medical Equipment |
Use Scenario: Measuring charging/discharging current in lithium-ion battery packs using 10mΩ shunt resistors on ground path. IC Role / Device Role / Timing Role: Ground-referenced instrumentation amplifier rejecting common-mode voltage from battery stack while amplifying shunt voltage. Use Value: Input common-mode range down to –0.1V enables accurate sensing even during deep discharge; rail-to-rail output maximizes ADC utilization. | Use Scenario: Front-end amplification of ECG electrode signals in handheld patient monitors operating from AAA batteries. IC Role / Device Role / Timing Role: Low-noise, low-power instrumentation amplifier boosting weak biopotential signals prior to filtering and digitization. Use Value: 100µV offset and ±0.1% gain error ensure diagnostic-grade baseline stability; shutdown mode synchronizes with ECG sampling intervals to cut average power. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8221ARMZ | Higher 10MHz GBWP, but 1.2mA supply current and SOIC-8 package; no shutdown function. | Suitable for higher-bandwidth industrial DAQ, not for ultra-low-power portable use. | Select AD8221ARMZ only if >1MHz closed-loop bandwidth is required and board space/power budget allow. |
| INA333AIDRGT | Lower 0.17µV/°C offset drift, 50µA supply current, but 0.25V output headroom limits rail-to-rail performance. | Better for long-term DC stability in environmental monitoring; less ideal for full-scale ADC utilization. | Choose INA333AIDRGT when offset drift dominates error budget and supply current is critical, but accept reduced output swing. |
Compared with AD8221ARMZ and INA333AIDRGT, the MAX4461TETT+T uniquely balances ultra-low 700µA supply current, true rail-to-rail output, integrated shutdown, and compact 2mm × 2mm TDFN package-making it optimal for space- and energy-constrained precision sensing.
Availability
MAX4461TETT+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 across extended temperature ranges (–40°C to +85°C).
Supply support for MAX4461TETT+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 MAX4461TETT+T belongs to Maxim's precision instrumentation amplifier product line, engineered specifically for low-power, space-constrained sensor signal conditioning in single-supply systems.
FAQ
What is the gain configuration of the MAX4461TETT+T?
The MAX4461TETT+T has a factory-trimmed fixed gain of 10 V/V (denoted by the 'T' suffix). It does not support adjustable gain via external resistors-unlike the MAX4460. This fixed configuration ensures ±0.1% gain accuracy over temperature and eliminates layout sensitivity associated with external feedback networks.
Does the MAX4461TETT+T support dual-supply operation?
No, the MAX4461TETT+T is specified only for single-supply operation from 2.85V to 5.25V. Its output is ground-referenced, and the input common-mode range extends from –0.1V to (VDD – 1.7V). For dual-supply applications requiring bipolar output swing, consider the MAX4462 series instead.
How is the shutdown function implemented on the MAX4461TETT+T?
The MAX4461TETT+T uses pin 6 (SHDN) for shutdown control: drive SHDN ≤0.3×VDD to enter shutdown (supply current drops to <1µA); drive SHDN ≥0.7×VDD for normal operation. In shutdown, the output goes high-impedance-not tri-stated-and the internal transconductance stages are disabled.
What is the maximum capacitive load the MAX4461TETT+T can drive without instability?
The MAX4461TETT+T is stable driving up to 100pF capacitive load, as verified in the datasheet's Electrical Characteristics table. Exceeding this value may cause peaking or oscillation; for heavier loads (e.g., long traces or ADC input capacitance), add a small series resistor (10–50Ω) between OUT and the load to maintain phase margin.
Can the MAX4461TETT+T be used with a 2.5V supply?
Yes, the MAX4461TETT+T operates down to 2.85V minimum supply voltage per Absolute Maximum Ratings and Electrical Characteristics tables. A 2.5V supply falls below specification and risks degraded performance-including reduced CMRR, increased offset, and potential failure to meet gain accuracy or output swing guarantees.
MAX4461TETT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Strip
- 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:
- 6-TDFN (3x3)
MAX4461TETT+T FAQ
1.How can I place an order for MAX4461TETT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4461TETT+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 MAX4461TETT+T reliable?
The price and inventory of MAX4461TETT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4461TETT+T is usually 5 days.
3.What payment methods are accepted for MAX4461TETT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4461TETT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4461TETT+T?
MAX4461TETT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4461TETT+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 MAX4461TETT+T?
For technical support, including MAX4461TETT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4461TETT+T requirements.
6.How does Aetrix verify that MAX4461TETT+T is sourced from the original manufacturer or authorized distributors?
All MAX4461TETT+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 MAX4461TETT+T meets industry standards.
7.What is the process for return or replacement of MAX4461TETT+T?
All MAX4461TETT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4461TETT+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 MAX4461TETT+T part is unused and in its original packaging.
Return procedure for MAX4461TETT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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