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Analog Devices Inc./Maxim Integrated MAX4462HEUT
- Part No.:
- MAX4462HEUT
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
MAX4462HEUT.pdf
- Description:
- IC INST AMP 1 CIRCUIT SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,201
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Product details
Overview
MAX4462HEUT from Maxim Integrated is a precision rail-to-rail output instrumentation amplifier with fixed gain of 100 V/V, reference input (REF) for bipolar operation in single-supply systems, ±0.1% gain accuracy, 100 µV typical input offset voltage, and 2.5 MHz gain-bandwidth product. It enables high-accuracy differential signal amplification in low-voltage industrial sensor interfaces.
For engineers reviewing the MAX4462HEUT datasheet, MAX4462HEUT pinout, MAX4462HEUT application, or MAX4462HEUT equivalent, key selection criteria include REF-pin-based output centering for true bipolar input handling, ground-sensing capability down to VSS − 0.1 V, ultra-low 1 pA typical input bias current, and compatibility with 2.85 V to 5.25 V single supplies or ±2.6 V dual supplies.
Technical Context
The MAX4462HEUT implements Maxim's proprietary indirect current-feedback architecture, converting differential input voltage to current via transconductance stages, then subtracting feedback-derived current to drive a class-AB loop amplifier. This enables simultaneous ground-sensing (VCM down to VSS − 0.1 V), high CMRR (90–120 dB), and rail-to-rail output swing.
As the H-suffix variant, MAX4462HEUT is factory-trimmed for G = 100 V/V with ±0.1% gain error at +25°C and operates with REF pin biased to external reference (0.1 V to VDD − 1.7 V), enabling zero-differential-input output = VREF - critical for AC-coupled or bipolar transducer signals in battery-powered medical and industrial equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | Fixed 100 V/V - eliminates external resistor network, reduces layout sensitivity and thermal drift in precision gain stages. |
| Input Offset Voltage | ±100 µV (typ) - supports accurate amplification of sub-10 mV differential signals (e.g., strain gauges, RTDs) without nulling circuitry. |
| Gain-Bandwidth Product | 2.5 MHz - enables stable 100× amplification up to 25 kHz (BW-3dB = 25 kHz), suitable for dynamic sensor signals and audio preamplification. |
| Input Bias Current | 1 pA (typ) - preserves signal integrity in high-impedance source applications (e.g., piezoelectric sensors, pH electrodes). |
| Supply Voltage Range | 2.85 V to 5.25 V single supply, or ±2.6 V dual supply - supports direct integration into 3.3 V/5 V systems and low-voltage portable designs. |
| REF Input Range | VSS + 0.1 V to VDD − 1.7 V - allows flexible output centering (e.g., VREF = VDD/2 for max swing, or VREF = 1.25 V for Li-ion battery monitoring). |
| Input Common-Mode Range | VSS − 0.1 V to VDD − 1.7 V - enables true ground-sensing (down to negative rail), essential for low-side current sensing and shunt-based measurements. |
Pinout & Package
MAX4462HEUT is housed in a 6-pin SOT23 package (JEDEC MO-178AA), with exposed pad connected to VSS for thermal and noise performance. Pin 1 is OUT; Pin 2 is VSS; Pin 3 is IN+; Pin 4 is IN−; Pin 5 is VDD; Pin 6 is REF.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplified Output | Rail-to-rail output stage delivers full swing between VSS and VDD; output voltage = VREF + 100 × (IN+ − IN−). |
| 2 (VSS) | Negative Supply | Reference for internal circuitry and exposed pad; supports single-supply (0 V) or dual-supply (e.g., −2.6 V) operation. |
| 3 (IN+) | Positive Differential Input | High-impedance MOS input (RIN > 2 GΩ); accepts signals within VSS − 0.1 V to VDD − 1.7 V common-mode range. |
| 4 (IN−) | Negative Differential Input | Matched to IN+; differential input range ±20 mV (G = 100) ensures specified linearity and gain accuracy. |
| 5 (VDD) | Positive Supply | Accepts 2.85 V to 5.25 V; PSRR = 80–100 dB ensures immunity to supply noise in noisy embedded environments. |
| 6 (REF) | Output Reference Level | Externally driven low-impedance node; sets quiescent output level for zero differential input - enables bipolar signal handling on single supply. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed G = 100 V/V | ±0.1% gain error at +25°C - eliminates calibration overhead and improves channel-to-channel matching in multi-sensor systems. |
| REF pin for output centering | Enables true bipolar output swing (e.g., ±1 V around VREF = 2.5 V) using only single 5 V supply - removes need for split rails in portable instrumentation. |
| Rail-to-rail output | Delivers >99% of VDD–VSS swing at RL ≥ 10 kΩ - maximizes dynamic range for ADC interfacing without level-shifting circuitry. |
| Ultra-low input bias current | 1 pA typical - prevents loading errors in high-Z sources (e.g., thermocouples, capacitive sensors), preserving signal fidelity. |
| Ground-sensing input stage | Operates with inputs down to VSS − 0.1 V - supports low-side current sensing, shunt-based measurement, and direct connection to 0 V-referenced transducers. |
Applications
| Strain-Gauge Amplifier | Precision Low-Side Current Sense |
|---|---|
Use Scenario: Amplifying microvolt-level bridge outputs from metal foil or semiconductor strain gauges in load cells and pressure sensors. IC Role / Device Role / Timing Role: Instrumentation amplifier providing fixed 100× gain, REF-biased output for ratiometric ADC interfacing, and rejection of common-mode noise from long leads. Use Value: ±0.1% gain accuracy and 100 µV offset enable <10 ppm measurement resolution without trimming; ground-sensing allows direct connection to grounded bridge legs. |
Use Scenario: Measuring bidirectional current through low-value shunts (e.g., 10 mΩ) in motor control or battery management systems. IC Role / Device Role / Timing Role: Differential amplifier with REF pin set to mid-supply, converting ±50 mV shunt voltage into ±5 V output centered at 2.5 V for 12-bit ADC input. Use Value: Bipolar output capability eliminates need for op-amp level shifters; 1 pA input bias avoids shunt voltage error; 2.5 MHz GBW supports fast transient detection. |
| Battery-Powered Medical Equipment | Transducer Interface for Industrial Sensors |
Use Scenario: Signal conditioning for ECG electrodes or impedance pneumography sensors in portable monitors with 3.3 V supply. IC Role / Device Role / Timing Role: Low-power (700 µA) instrumentation amplifier with REF = 1.65 V, delivering rail-to-rail output compatible with SAR ADC reference. Use Value: Single-supply operation and 2.85 V minimum VDD extend battery life; 18 nV/√Hz input noise preserves SNR in low-amplitude bio-signals. |
Use Scenario: Interfacing 4–20 mA loop-powered transducers or millivolt-output RTDs in PLC analog input modules. IC Role / Device Role / Timing Role: Precision gain block with REF referenced to system AGND, rejecting common-mode noise from field wiring while maintaining high CMRR (>90 dB). Use Value: Input CMR down to VSS − 0.1 V allows direct connection to grounded transducer shields; ±0.1% gain stability over temperature reduces recalibration frequency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8429ARMZ | G = 1000 fixed (not 100); higher 0.8 µV offset; 4.5 MHz GBW; no REF pin - output referenced to VS/2 internally. | Requires external level-shifting for bipolar signals on single supply; better suited for ultra-low-noise, high-gain applications where REF flexibility is not needed. | Select AD8429ARMZ only when >100× gain and lower 1/f noise are required; MAX4462HEUT preferred for REF-controlled centering and lower power (700 µA vs. 3.6 mA). |
| LTC6915IMS8-100 | Digitally programmable gain (1–100); 250 µV offset; 1.5 MHz GBW; no REF pin; SPI interface adds complexity. | Not pin-compatible; requires digital control lines and firmware support; unsuitable for analog-only or space-constrained layouts. | Choose LTC6915IMS8-100 only if gain reconfiguration during operation is mandatory; MAX4462HEUT offers simpler analog design, lower quiescent current, and guaranteed ±0.1% gain accuracy without calibration. |
Compared with AD8429ARMZ and LTC6915IMS8-100, MAX4462HEUT uniquely combines factory-trimmed 100× gain, dedicated REF pin for flexible output centering, ground-sensing inputs, and sub-1 mA supply current - making it optimal for cost-sensitive, space-constrained, single-supply industrial and medical sensor front-ends requiring deterministic analog performance.
Availability
MAX4462HEUT 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 MAX4462HEUT 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, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The MAX4462HEUT belongs to Maxim's precision instrumentation amplifier family, engineered specifically for low-power, single-supply sensor signal conditioning with bipolar capability - targeting applications where REF-controlled output centering and ground-sensing are critical.
FAQ
What is the function of the REF pin on the MAX4462HEUT?
The REF pin on the MAX4462HEUT sets the output voltage for zero differential input (i.e., when IN+ = IN−). It accepts an external low-impedance reference voltage between VSS + 0.1 V and VDD − 1.7 V. For example, connecting REF to VDD/2 centers the output at mid-supply, enabling full bipolar swing (e.g., ±1 V) from a single 5 V supply. This eliminates the need for dual supplies in AC-coupled sensor interfaces. The MAX4462HEUT's REF pin is fundamental to its role as a true single-supply bipolar instrumentation amplifier.
Does the MAX4462HEUT support dual-supply operation?
Yes, the MAX4462HEUT supports dual-supply operation with VDD up to +2.6 V and VSS down to −2.6 V. In this configuration, the REF pin should be connected to ground to establish a 0 V output center point for bipolar signals. The input common-mode range extends from VSS − 0.1 V to VDD − 1.7 V, and the output swings rail-to-rail between VSS and VDD. Dual-supply mode is confirmed in the MAX4462 Electrical Characteristics tables and Detailed Description section of the datasheet, distinguishing it from the MAX4460/MAX4461 variants.
What is the maximum differential input voltage allowed for the MAX4462HEUT at G = 100?
For the MAX4462HEUT configured at G = 100, the specified differential input voltage range is ±20 mV under typical conditions (VDD = 5 V, TA = +25°C, RL = 100 kΩ to VDD/2). This range ensures guaranteed linearity (≤0.15% nonlinearity), gain accuracy (±0.15% gain error), and output settling within specification. Exceeding ±20 mV may degrade accuracy but will not damage the device, as absolute maximum ratings allow input pins to swing within (VSS − 0.3 V) to (VDD + 0.3 V). The MAX4462HEUT's REF pin allows asymmetric swing - e.g., −15 mV/+25 mV - if VREF is adjusted accordingly.
How does the MAX4462HEUT achieve ground-sensing capability?
The MAX4462HEUT achieves ground-sensing (or VSS-sensing) capability through its proprietary indirect current-feedback architecture and MOS input stage, allowing the input common-mode voltage (VCM) to extend down to VSS − 0.1 V. This enables direct connection to grounded transducer elements, low-side current shunts, or 0 V-referenced bridges without level-shifting circuitry. Unlike traditional three-op-amp instrumentation amplifiers, the MAX4462HEUT's input stage operates with true rail-to-rail common-mode range on the negative side - a feature explicitly guaranteed in the Absolute Maximum Ratings and Electrical Characteristics tables for MAX4462 devices.
Is the MAX4462HEUT pin-compatible with other MAX446x variants?
No, the MAX4462HEUT is not pin-compatible with MAX4460 or MAX4461 variants. While all share the same 6-pin SOT23 footprint, pin functions differ: MAX4462HEUT uses Pin 6 as REF, whereas MAX4461xx uses Pin 6 as SHDN and MAX4460xx uses Pin 6 as FB. Swapping them risks incorrect biasing or functional failure. The Pin Descriptions table in the datasheet confirms distinct assignments per family member. Always verify pin mapping against the specific variant's schematic symbol - MAX4462HEUT's REF functionality is unique to the MAX4462 series and cannot be replicated by substituting other MAX446x parts.
MAX4462HEUT 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:
- 25 kHz
- 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:
- SOT-23-6
MAX4462HEUT FAQ
1.How can I place an order for MAX4462HEUT through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4462HEUT 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 MAX4462HEUT reliable?
The price and inventory of MAX4462HEUT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4462HEUT is usually 5 days.
3.What payment methods are accepted for MAX4462HEUT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4462HEUT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4462HEUT?
MAX4462HEUT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4462HEUT 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 MAX4462HEUT?
For technical support, including MAX4462HEUT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4462HEUT requirements.
6.How does Aetrix verify that MAX4462HEUT is sourced from the original manufacturer or authorized distributors?
All MAX4462HEUT 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 MAX4462HEUT meets industry standards.
7.What is the process for return or replacement of MAX4462HEUT?
All MAX4462HEUT units undergo pre-shipment inspection (PSI). If there is an issue with MAX4462HEUT, 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 MAX4462HEUT part is unused and in its original packaging.
Return procedure for MAX4462HEUT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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