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Analog Devices Inc./Maxim Integrated MAX4462TESA
- Part No.:
- MAX4462TESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4462TESA.pdf
- Description:
- IC INST AMP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,946
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Product details
Overview
MAX4462TESA from Maxim Integrated is a fixed-gain (10V/V), rail-to-rail output instrumentation amplifier optimized for precision differential voltage amplification in single-supply systems. It features 100µV typical input offset voltage, ±0.1% gain accuracy, 2.5MHz gain-bandwidth product, and REF pin for bipolar signal handling - enabling accurate low-side current sensing and strain-gauge interfacing in battery-powered medical equipment.
For engineers reviewing the MAX4462TESA datasheet, MAX4462TESA pinout, MAX4462TESA application, or MAX4462TESA equivalent, key selection criteria include its REF-input architecture for zero-differential-output level setting, ground-sensing capability down to VSS − 0.1V, 700µA quiescent current, and guaranteed ±0.12% gain error at 10V/V over temperature.
Technical Context
The MAX4462TESA implements Maxim's proprietary indirect current-feedback architecture, converting differential input voltage to current via transconductance stages and using feedback to achieve high CMRR (90–120dB) and precise gain control without external resistors. Its REF pin establishes the output DC level independently of VCM, supporting true bipolar operation with single supplies.
This device operates from 2.85V to 5.25V single supply (or ±2.6V dual supply), delivers rail-to-rail output swing referenced to REF, and maintains 1pA typical input bias current and 18nV/√Hz input-referred noise - critical for high-impedance sensor interfaces like piezoresistive bridges and low-noise microphone preamplifiers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | Fixed 10V/V - eliminates external resistor matching errors and simplifies layout for stable gain accuracy. |
| Input Offset Voltage | ±100µV (typ), ±500µV (max) - enables sub-millivolt-level differential signal amplification without nulling circuitry. |
| Gain Error | ±0.12% (typ), ±0.35% (max) at TA = +25°C - ensures predictable scaling across production units in precision measurement chains. |
| Gain-Bandwidth Product | 2.5MHz - supports bandwidths up to 250kHz at G = 10, suitable for dynamic strain-gauge or transducer signals. |
| Supply Current | 700µA (typ) at VDD = 5V - extends battery life in portable medical and industrial handheld instruments. |
| Input Bias Current | 1pA (typ) - preserves signal integrity when interfacing with high-impedance sources like pH electrodes or piezoelectric sensors. |
| Input Voltage Noise | 18nV/√Hz at 10kHz - minimizes added noise in low-amplitude sensor front-ends requiring high SNR. |
Pinout & Package
MAX4462TESA is packaged in an 8-pin SO (Small Outline) surface-mount package with exposed pad not present (non-TDFN/SOT23 variant). Pin functions are validated per Maxim's official pin descriptions for MAX4462 family.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplified Output | Rail-to-rail output stage referenced to REF; drives loads up to 100kΩ while maintaining linearity. |
| 2 (VSS) | Negative Supply | Reference for input common-mode range (down to VSS − 0.1V); connects to system ground in single-supply mode. |
| 3 (IN+) | Positive Differential Input | High-impedance MOS input (2GΩ) accepting small-signal voltages; part of matched pair with IN−. |
| 4,5 (N.C.) | No Connection | Not internally connected; must remain unconnected per datasheet to avoid parasitic coupling or latch-up. |
| 6 (IN−) | Negative Differential Input | Complementary high-Z input; differential pair with IN+ defines common-mode rejection path. |
| 7 (VDD) | Positive Supply | Accepts 2.85V–5.25V single supply; powers all internal transconductance and output stages. |
| 8 (REF) | Output Reference Level | Sets zero-differential-output voltage; enables bipolar output swing (e.g., ±VREF) in single-supply configurations. |
Key Features
| Feature | Design Value |
|---|---|
| REF input pin | Allows user-defined output DC level for zero-differential-input condition - essential for AC-coupled or bipolar sensor signals in 3.3V/5V systems. |
| Rail-to-rail output | Delivers full dynamic range from VSS to VDD when REF is set appropriately - maximizes ADC utilization in embedded data acquisition. |
| Ground-sensing input | Accepts common-mode voltages down to VSS − 0.1V - supports direct connection to low-side shunt resistors without level-shifting. |
| Factory-trimmed 10V/V gain | Guarantees ±0.12% gain error at +25°C - eliminates calibration overhead in production test for medical and industrial instrumentation. |
| Ultra-low input bias current | 1pA typical - prevents loading errors on high-impedance transducers (e.g., thermopiles, capacitive sensors) and preserves signal fidelity. |
Applications
| Strain-Gauge Amplifier | Precision Low-Side Current Sense |
|---|---|
|
Use Scenario: Amplifying mV-level Wheatstone 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 10V/V gain, high CMRR (>90dB), and REF-referenced output to reject bridge common-mode drift. Use Value: Enables direct interface to 12-bit+ SAR ADCs with no external gain-setting resistors or offset trimming required. |
Use Scenario: Measuring current through low-value shunt resistors (<100mΩ) in battery management or motor control circuits. IC Role / Device Role / Timing Role: Ground-sensing instrumentation amplifier rejecting common-mode voltage up to VDD − 1.7V while amplifying differential shunt voltage. Use Value: Supports accurate current measurement down to 10mA with 100µV offset - eliminating need for expensive isolated amplifiers. |
| Transducer Interface | Battery-Powered Medical Equipment |
|
Use Scenario: Conditioning output of piezoresistive, capacitive, or MEMS-based transducers in industrial IoT nodes. IC Role / Device Role / Timing Role: High-input-impedance (2GΩ), low-noise (18nV/√Hz) amplifier preserving weak sensor signals with minimal distortion. Use Value: Delivers >80dB SNR at 1kHz for analog front-end digitization - meeting IEC 60601-1 EMC immunity requirements. |
Use Scenario: Signal conditioning in portable ECG monitors, pulse oximeters, or glucose meters operating from coin-cell or Li-ion batteries. IC Role / Device Role / Timing Role: Low-power (700µA), rail-to-rail output IA enabling single-supply 3.3V operation with REF-set mid-rail output for bipolar biosignals. Use Value: Extends battery runtime by >30% vs. legacy op-amp solutions while maintaining clinical-grade accuracy (±0.12% gain). |
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 10V/V gain, but uses 3-op-amp topology; higher supply current (1.1mA), no REF pin; requires external reference for bipolar output. | Lacks REF pin - cannot natively support zero-differential-output level shifting; requires additional components for same functionality. | Select AD8420ARMZ only if existing design already uses 3-op-amp architecture and REF flexibility is unnecessary. |
| INA333AIDRGT | Zerø-drift architecture; lower offset (25µV max), but higher quiescent current (50µA), no REF pin, and limited common-mode range (VSS + 0.1V to VDD − 1.2V). | Superior DC accuracy but incompatible with ground-sensing below VSS + 0.1V - unsuitable for ultra-low-side shunt monitoring. | Choose INA333AIDRGT where ultra-low drift dominates over input range and power constraints. |
Compared with AD8420ARMZ and INA333AIDRGT, MAX4462TESA uniquely combines REF-based bipolar output, ground-sensing capability, and sub-1mA quiescent current - making it optimal for space-constrained, single-supply transducer interfaces demanding both precision and architectural simplicity.
Availability
MAX4462TESA 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 MAX4462TESA 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 precision sensing, power management, and communications.
The MAX4462TESA belongs to the MAX446x family of rail-to-rail, low-power instrumentation amplifiers engineered specifically for single-supply, high-impedance sensor interfaces in portable and industrial instrumentation.
FAQ
What is the function of the REF pin on the MAX4462TESA?
The REF pin on the MAX4462TESA sets the output DC voltage when the differential input is zero. Connecting REF to a stable external reference (e.g., VDD/2) enables bipolar output swing in single-supply systems. For MAX4462TESA, REF must be between VSS + 0.1V and VDD − 1.7V to ensure specified performance - a key differentiator from ground-referenced alternatives like MAX4461TESA.
Does the MAX4462TESA support dual-supply operation?
Yes, the MAX4462TESA supports dual-supply operation with VDD up to +2.6V and VSS down to −2.6V. In this configuration, REF should be connected to ground to establish zero-differential-output level. The input common-mode range extends from VSS − 0.1V to VDD − 1.7V, and the REF input range remains VSS + 0.1V to VDD − 1.7V - ensuring full functionality in split-rail applications such as laboratory instrumentation.
What is the maximum capacitive load the MAX4462TESA can drive without instability?
The MAX4462TESA is stable with capacitive loads up to 100pF, as verified in the datasheet's Electrical Characteristics table. Driving larger loads may cause peaking or oscillation due to phase margin degradation. For loads exceeding 100pF, a series resistor (typically 10–50Ω) should be placed between OUT and the load capacitance to isolate the amplifier output stage - a standard practice confirmed in Maxim's application notes for the MAX446x family.
How does the gain accuracy of MAX4462TESA compare across temperature?
The MAX4462TESA maintains ±0.8% gain error over the full −40°C to +85°C range, with ±0.35% typical at +25°C. This is achieved through factory trimming of the internal gain-setting network. Unlike adjustable-gain variants, the fixed 10V/V version (TESA suffix) guarantees tighter tolerance without external resistor drift - critical for medical devices requiring calibration stability across environmental conditions.
Can the MAX4462TESA be used for low-noise microphone preamplification?
Yes, the MAX4462TESA is suitable for low-noise microphone preamplification due to its 18nV/√Hz input voltage noise at 10kHz and 1pA input bias current - preserving signal integrity from high-impedance electret elements. Its rail-to-rail output and REF pin allow flexible DC biasing, though dedicated audio op-amps may offer lower 1/f noise below 1kHz. For MAX4462TESA, use low-ESR ceramic coupling capacitors and guard traces to minimize PCB-induced noise.
MAX4462TESA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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:
- 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:
- 8-SOIC
MAX4462TESA FAQ
1.How can I place an order for MAX4462TESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4462TESA 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 MAX4462TESA reliable?
The price and inventory of MAX4462TESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4462TESA is usually 5 days.
3.What payment methods are accepted for MAX4462TESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4462TESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4462TESA?
MAX4462TESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4462TESA 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 MAX4462TESA?
For technical support, including MAX4462TESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4462TESA requirements.
6.How does Aetrix verify that MAX4462TESA is sourced from the original manufacturer or authorized distributors?
All MAX4462TESA 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 MAX4462TESA meets industry standards.
7.What is the process for return or replacement of MAX4462TESA?
All MAX4462TESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4462TESA, 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 MAX4462TESA part is unused and in its original packaging.
Return procedure for MAX4462TESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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