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Analog Devices Inc./Maxim Integrated MAX4460ETT+T
- Part No.:
- MAX4460ETT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
MAX4460ETT+T.pdf
- Description:
- IC INST AMP 1 CIRCUIT 6TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,435
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Product details
Overview
The MAX4460ETT+T from Maxim Integrated is an adjustable-gain, rail-to-rail output instrumentation amplifier optimized for precision low-level differential signal amplification in single-supply systems. It features 100µV typical input offset voltage, 1pA typical input bias current, 2.5MHz gain-bandwidth product, and operates from 2.85V to 5.25V with only 700µA quiescent current - enabling high-accuracy strain-gauge and transducer interfacing in battery-powered medical equipment.
For engineers reviewing the MAX4460ETT+T datasheet, MAX4460ETT+T pinout, MAX4460ETT+T application, or MAX4460ETT+T equivalent, this page delivers verified circuit role (ground-referenced instrumentation amp), package (6-pin TDFN-EP), gain configuration method (external FB resistor network), and real-world design constraints including input common-mode range (–0.1V to VDD–1.7V) and rail-to-rail output swing limitations under load.
Technical Context
The MAX4460ETT+T implements Maxim's proprietary indirect current-feedback architecture, converting differential input voltage to current via a transconductance stage, then subtracting a precision feedback current derived from the output voltage divided by gain. This enables ground-sensing capability while maintaining ultra-high input impedance (>2GΩ) and excellent CMRR (90–120dB).
Unlike traditional three-op-amp instrumentation amps, the MAX4460ETT+T uses a single-loop amplifier with class-AB output stage and no internal gain-setting resistors - gain is fully determined by external resistors between OUT, FB, and GND. Its FB pin serves as the feedback node for gain programming, and its output is internally referenced to GND, supporting unipolar operation only.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | Adjustable via external resistors (no fixed gain options); supports precise tuning across applications without part changes. |
| Input Offset Voltage | ±100µV (typ), ±600µV (max) at +25°C - enables accurate amplification of mV-level sensor signals like strain gauges. |
| Input Bias Current | 1pA (typ), ≤100pA (max) - preserves signal integrity in high-impedance sensor interfaces (e.g., piezoelectric transducers). |
| Gain-Bandwidth Product | 2.5MHz - supports stable 100× gain up to ~25kHz or 10× gain up to ~250kHz for dynamic measurements. |
| Supply Current | 700µA (typ) at 5V - allows continuous operation in portable, low-power medical devices with multi-day battery life. |
| Input Common-Mode Range | –0.1V to VDD–1.7V - permits direct sensing of signals referenced to ground or near-negative rails in single-supply systems. |
| Output Swing | Rail-to-rail (with >200kΩ load); degrades under heavy load - requires careful output loading design to maintain accuracy. |
Pinout & Package
MAX4460ETT+T is housed in a 6-pin TDFN-EP (Exposed Pad) package (2.0mm × 2.0mm × 0.8mm), thermally enhanced for low-power precision operation. The exposed pad must be soldered to PCB ground for optimal thermal performance and noise immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplified Output | Delivers rail-to-rail output voltage referenced to GND; connects to ADC input or next-stage filter. |
| 2 (GND) | Negative Supply / Reference | Ground reference for all internal circuitry and output; must be low-impedance connection to system ground plane. |
| 3 (IN+) | Positive Differential Input | High-impedance MOS input accepting small differential signals; sensitive to layout-induced noise. |
| 4 (IN−) | Negative Differential Input | Matched high-Z input; forms differential pair with IN+; requires symmetrical trace routing. |
| 5 (VDD) | Positive Supply | Accepts 2.85V–5.25V single supply; bypass capacitor (0.1µF) required close to pin for stability. |
| 6 (FB) | Feedback Input | Connects to center tap of external resistor divider (OUT–FB–GND) to set gain; defines closed-loop transfer function. |
| EP | Exposed Thermal Pad | Must be soldered to GND plane for thermal dissipation and EMI reduction; not electrically functional. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable Gain Architecture | Enables one-footprint support for multiple gain requirements (e.g., 10× for load cells, 100× for thermopiles) without redesigning PCB. |
| Ground-Sensing Input Stage | Allows direct amplification of signals whose common-mode voltage is at or near GND - critical for low-side current sensing and bridge-based sensors. |
| Ultra-Low Input Bias Current (1pA) | Prevents signal attenuation and DC error in high-source-impedance applications such as pH electrodes or photodiode preamps. |
| Rail-to-Rail Output | Maximizes dynamic range into low-voltage ADCs (e.g., 12-bit SAR converters on 3.3V supplies), improving SNR without level-shifting. |
| 18nV/√Hz Input-Referred Noise | Supports clean amplification of microvolt-level signals (e.g., microphone preamplification) without requiring additional filtering stages. |
Applications
| Strain-Gauge Amplifier | Precision Low-Side Current Sense |
|---|---|
Use Scenario: Amplifying mV-level differential output from a Wheatstone bridge strain gauge in industrial weighing systems. IC Role / Device Role: Instrumentation amplifier providing adjustable gain, high CMRR, and ground-referenced output for ADC digitization. Use Value: Enables sub-0.1% full-scale measurement accuracy with minimal external components and no offset trimming required. |
Use Scenario: Monitoring battery discharge current in portable medical devices using a shunt resistor placed between load and ground. IC Role / Device Role: Ground-sensing instrumentation amplifier rejecting common-mode voltage while amplifying shunt voltage drop. Use Value: Delivers accurate current measurement down to µA levels with 1pA input bias current preventing shunt error accumulation. |
| Low-Noise Microphone Preamplifier | Battery-Powered Medical Equipment |
Use Scenario: Boosting weak audio signals from electret condenser microphones in hearing aids or voice recorders. IC Role / Device Role: Low-noise, low-power instrumentation amplifier with rail-to-rail output driving ADC input directly. Use Value: Achieves 18nV/√Hz noise floor and 700µA supply current - extends battery life while preserving speech intelligibility. |
Use Scenario: Signal conditioning for ECG front-end circuits where low power, small size, and precision are mandatory. IC Role / Device Role: Single-supply instrumentation amplifier amplifying differential biopotential signals with high input impedance and low offset drift. Use Value: Meets clinical-grade accuracy (±100µV offset, ±0.1% gain error) in space-constrained wearable form factors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8420ARMZ | Fixed gains only (10, 100, 500); higher supply current (1.1mA); 10MHz GBWP | Requires PCB change for gain adjustment; better for high-speed, fixed-gain industrial sensing | Select when higher bandwidth and factory-trimmed gain stability outweigh need for field-programmable gain. |
| INA333AIDRGT | Adjustable gain via RG resistor; lower offset (25µV typ); 500kHz GBWP; 50µA supply current | Superior DC precision but limited bandwidth; optimized for ultra-low-power, low-frequency biosensing | Select when microamp-level quiescent current and sub-50µV offset are prioritized over bandwidth and rail-to-rail output swing. |
Compared with AD8420ARMZ and INA333AIDRGT, the MAX4460ETT+T uniquely balances adjustable gain, 2.5MHz bandwidth, rail-to-rail output, and 700µA supply current in a 2mm × 2mm TDFN package - making it optimal for compact, battery-operated instrumentation where gain flexibility and dynamic range are both essential.
Availability
MAX4460ETT+T is available at Aetrix Electronics and suitable for industrial process control, precision transducer interface, and battery-powered medical equipment requiring stable component supply across extended temperature ranges (–40°C to +85°C) and long production lifecycles.
Supply support for MAX4460ETT+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 MAX4460ETT+T belongs to Maxim's precision instrumentation amplifier family, engineered specifically for low-power, single-supply sensor signal conditioning in space-constrained, battery-operated systems requiring ground-sensing capability and high DC accuracy.
FAQ
What is the gain configuration method for the MAX4460ETT+T?
The MAX4460ETT+T uses an external resistor network connected between pins OUT, FB, and GND to set gain. Unlike fixed-gain variants (e.g., MAX4461), it has no internal resistors - gain = 1 + R1/R2, where R1 connects OUT to FB and R2 connects FB to GND. This allows precise, application-specific gain tuning without changing the MAX4460ETT+T footprint.
Does the MAX4460ETT+T support dual-supply operation?
No, the MAX4460ETT+T is specified only for single-supply operation from 2.85V to 5.25V. Its internal architecture references output and inputs to GND, and the absolute maximum ratings do not support negative supply voltages. For dual-supply applications requiring bipolar output swing, consider the MAX4462ETT+T instead.
What is the purpose of the FB pin on the MAX4460ETT+T?
The FB (Feedback) pin on the MAX4460ETT+T serves as the programmable gain node. It accepts the center tap of an external resistor divider between OUT and GND, establishing the feedback ratio that determines closed-loop gain. This pin replaces internal gain resistors, enabling flexible, precision gain setting while maintaining high CMRR and low offset.
Can the MAX4460ETT+T drive capacitive loads?
The MAX4460ETT+T is stable with up to 100pF capacitive load, per datasheet testing. Driving larger capacitive loads (e.g., long cables or ADC input capacitance >100pF) may cause peaking or oscillation. For such cases, add a small series resistor (10–50Ω) between OUT and the load to isolate capacitance and preserve phase margin.
How does the input common-mode range affect sensor interface design with the MAX4460ETT+T?
The MAX4460ETT+T supports an input common-mode range from –0.1V to VDD–1.7V, enabling true ground-sensing operation. This allows direct connection to bridge sensors or shunt resistors referenced to GND without level-shifting - but designers must ensure differential input signals stay within the specified range (e.g., ±48mV for G=100) to meet accuracy specs.
MAX4460ETT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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:
- -
- 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:
- 6-TDFN (3x3)
MAX4460ETT+T FAQ
1.How can I place an order for MAX4460ETT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4460ETT+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 MAX4460ETT+T reliable?
The price and inventory of MAX4460ETT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4460ETT+T is usually 5 days.
3.What payment methods are accepted for MAX4460ETT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4460ETT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4460ETT+T?
MAX4460ETT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4460ETT+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 MAX4460ETT+T?
For technical support, including MAX4460ETT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4460ETT+T requirements.
6.How does Aetrix verify that MAX4460ETT+T is sourced from the original manufacturer or authorized distributors?
All MAX4460ETT+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 MAX4460ETT+T meets industry standards.
7.What is the process for return or replacement of MAX4460ETT+T?
All MAX4460ETT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4460ETT+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 MAX4460ETT+T part is unused and in its original packaging.
Return procedure for MAX4460ETT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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