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Analog Devices Inc./Maxim Integrated MAX4462HEUT-T
- Part No.:
- MAX4462HEUT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
MAX4462HEUT-T.pdf
- Description:
- IC INST AMP 1 CIRCUIT SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:2,766
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Product details
Overview
The MAX4462HEUT-T 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, ±0.1% gain accuracy, 100 µV typical input offset voltage, and 2.5 MHz gain-bandwidth product - designed for single-supply (2.85V–5.25V) or dual-supply (±2.6V) precision differential signal conditioning in battery-powered medical devices and industrial transducer interfaces.
For engineers reviewing the MAX4462HEUT-T datasheet, MAX4462HEUT-T pinout, MAX4462HEUT-T application, or MAX4462HEUT-T equivalent, key selection criteria include REF-pin-enabled bipolar output swing, factory-trimmed 100× gain with 0.15% max gain error over temperature, ultra-low 1 pA typical input bias current, 18 nV/√Hz input-referred noise at 10 kHz, and SOT23-6 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX4462HEUT-T implements Maxim's proprietary indirect current-feedback architecture, converting differential input voltage to current, then subtracting a precision feedback current derived from output voltage divided by gain - enabling ground-sensing capability while maintaining >2 GΩ common-mode input resistance and high CMRR (90–120 dB). Its REF pin accepts an external low-impedance reference (0.1 V to VDD – 1.7 V) to set zero-differential-output voltage, supporting true bipolar signal handling in single-supply systems.
This variant (suffix 'H') is factory trimmed for 100 V/V gain, specified with ±0.1% gain error at +25°C and ≤3.0% over –40°C to +85°C, and operates with rail-to-rail output swing into 10 kΩ load. Unlike the MAX4461, it lacks shutdown logic; unlike the MAX4460, it does not use FB for gain setting - instead relying on internal trimming and REF for output centering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | Fixed 100 V/V - eliminates external resistor network, reduces layout sensitivity and thermal drift in high-gain sensor front-ends. |
| Gain Error | ±0.15% (typ), ≤3.0% (max, –40°C to +85°C) - enables accurate DC-coupled measurements without system-level calibration. |
| Input Offset Voltage | ±100 µV (typ), ±1300 µV (max, –40°C to +85°C) - supports sub-millivolt differential signal amplification with minimal baseline error. |
| Input Bias Current | 1 pA (typ), ≤100 pA (max) - preserves signal integrity in high-impedance source applications like piezoresistive strain gauges. |
| Gain-Bandwidth Product | 2.5 MHz - delivers usable bandwidth up to 25 kHz at G = 100, sufficient for ECG, pressure transducer, and bridge-based sensing. |
| Supply Current | 700 µA (typ, VDD = 5 V), 1.15 mA (max, –40°C to +85°C) - enables multi-year battery life in portable diagnostic equipment. |
| Input Voltage Noise | 18 nV/√Hz @ 10 kHz - low-noise performance critical for microvolt-level biomedical signal acquisition. |
Pinout & Package
MAX4462HEUT-T is housed in a lead-free 6-pin SOT23-6 package (JEDEC MO-178AA), 2.9 mm × 1.6 mm × 1.1 mm, with exposed pad connected to VSS for thermal and noise performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplified Output | Rail-to-rail output stage capable of swinging within 4 mV of VSS and 8 mV of VDD (RL = 10 kΩ); referenced to REF pin voltage for zero-differential output. |
| 2 (VSS) | Negative Supply | Connect to ground (single supply) or negative rail (dual supply); exposed pad must be soldered to VSS plane for optimal thermal dissipation and PSRR. |
| 3 (IN+) | Positive Differential Input | High-impedance MOS input (2 GΩ common-mode, >2 GΩ differential); accepts signals down to –0.1 V relative to VSS. |
| 4 (IN–) | Negative Differential Input | Matched to IN+ for CMRR >90 dB; supports differential inputs up to ±20 mV at G = 100 with full accuracy. |
| 5 (VDD) | Positive Supply | Operates from 2.85 V to 5.25 V (single) or ±2.6 V (dual); PSRR ≥75 dB ensures immunity to supply ripple in noisy environments. |
| 6 (REF) | Output Reference Level | Sets output DC level for zero differential input; requires low-impedance source (e.g., voltage divider or reference IC); range: VSS + 0.1 V to VDD – 1.85 V. |
Key Features
| Feature | Design Value |
|---|---|
| Bipolar output via REF pin | Enables AC-coupled or true bipolar signal amplification (e.g., ±20 mV input → ±2 V output) using single 3.3 V or 5 V supply - no charge pump or split rails required. |
| Factory-trimmed 100× gain | Eliminates external gain-setting resistors and associated matching/tolerance errors; achieves ±0.1% initial accuracy and <0.25% drift over temperature. |
| Ultra-low 1 pA input bias current | Minimizes voltage error across high-impedance sources (e.g., pH electrodes, thermopiles), preserving signal fidelity without guard traces or active guarding. |
| Rail-to-rail output with 18 nV/√Hz noise | Delivers full dynamic range utilization and low-noise amplification for precision analog front-ends in portable ECG, spirometry, and industrial IoT sensors. |
| Single/dual supply flexibility | Operates from 2.85–5.25 V (VDD to VSS) or ±2.6 V (VDD to VSS), with REF tied to ground in dual mode - simplifies power architecture in mixed-signal systems. |
Applications
| Industrial Strain-Gauge Amplifier | Low-Power Biomedical Sensor Interface |
|---|---|
Use Scenario: Amplifying mV-level Wheatstone bridge outputs from load cells in factory-floor weighing systems with 24-bit ADCs. IC Role / Device Role / Timing Role: Precision instrumentation amplifier providing 100× gain, REF-biased output centered at 1.65 V for 3.3 V ADC, rejecting common-mode noise from motor drives. Use Value: ±0.15% gain error and 100 µV offset enable <0.01% full-scale measurement accuracy without per-unit calibration. |
Use Scenario: Front-end amplification of ECG electrode signals in handheld patient monitors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-power, low-noise IAMP converting ±1 mV differential cardiac signals to 0–3.3 V single-ended output referenced to mid-supply via REF. Use Value: 700 µA quiescent current extends battery life beyond 3 years; 18 nV/√Hz noise ensures clean P-wave and T-wave morphology. |
| Precision Transducer Interface | Single-Supply Bipolar Signal Conditioning |
Use Scenario: Signal conditioning for RTD or thermocouple interfaces in programmable logic controllers with isolated 3.3 V supplies. IC Role / Device Role / Timing Role: High-CMRR (≥90 dB) IAMP rejecting ground-loop noise between sensor and controller, with REF tied to precision 1.25 V reference. Use Value: Input common-mode range extending 100 mV below VSS allows direct connection to grounded-sensor bridges without level-shifting circuitry. |
Use Scenario: Amplifying ±10 mV AC-coupled audio or vibration sensor outputs in battery-operated predictive maintenance nodes. IC Role / Device Role / Timing Role: REF-configured bipolar IAMP generating ±1 V output swing from 3.3 V rail, feeding SAR ADC with internal VREF. Use Value: Eliminates need for dual supplies or charge pumps - reduces BOM count by 3 components and PCB area by >15 mm². |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8429ARMZ-R7 | Fixed G = 1000, 1.2 nV/√Hz noise, 36 V supply range, SO-8 package | Higher gain and lower noise, but requires higher supply voltage and larger footprint; no REF pin - unipolar output only | Select when ultra-low noise (<2 nV/√Hz) and high-voltage operation (>15 V) are mandatory; avoid if REF-based bipolar swing or SOT23 size is required. |
| LTC6915IMS8#PBF | Digitally programmable gain (1–100), 12 nV/√Hz noise, 5.25 V max supply, MSOP-8 | Gains set via SPI, no REF pin; rail-to-rail output referenced to V–; higher quiescent current (1.1 mA) | Select when gain flexibility across multiple sensor types is needed in same design; avoid if fixed 100× accuracy, REF control, or minimal board area are priorities. |
Compared with AD8429ARMZ-R7 and LTC6915IMS8#PBF, the MAX4462HEUT-T uniquely combines factory-trimmed 100× gain, REF-controlled bipolar output, SOT23-6 footprint, and sub-1 µA input bias - making it optimal for miniaturized, battery-powered precision analog systems where layout area, power, and DC accuracy are constrained.
Availability
MAX4462HEUT-T is available at Aetrix Electronics and suitable for industrial process control, battery-powered medical equipment, precision transducer interface, and low-noise microphone preamplifier applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX4462HEUT-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, mixed-signal, and power-management ICs for industrial, medical, and communications applications - emphasizing precision, integration, and reliability.
The MAX4462HEUT-T belongs to Maxim's precision instrumentation amplifier product line, engineered specifically for low-power, high-accuracy differential signal conditioning in space- and energy-constrained systems - with emphasis on sensor front-ends requiring REF-based bipolar operation.
FAQ
What is the function of the REF pin on the MAX4462HEUT-T?
The REF pin on the MAX4462HEUT-T sets the output DC level for zero differential input voltage. When a stable external reference (e.g., 1.65 V from a divider or precision reference IC) is applied to REF, the output centers at that voltage - enabling true bipolar signal amplification (e.g., ±20 mV input → 1.63–1.67 V output) from a single supply. The REF input range is VSS + 0.1 V to VDD – 1.85 V, and it must be driven by a low-impedance source to maintain accuracy. This functionality is unique to the MAX4462HEUT-T among the MAX446x family and is essential for its use in MAX4462HEUT-T-based sensor interfaces.
Does the MAX4462HEUT-T support dual-supply operation?
Yes, the MAX4462HEUT-T supports dual-supply operation with VDD up to +2.6 V and VSS down to –2.6 V (±2.6 V total), as confirmed in the Absolute Maximum Ratings and Electrical Characteristics sections. In dual-supply mode, the REF pin is typically tied 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 – 1.85 V, and the device maintains rail-to-rail output swing. This capability makes the MAX4462HEUT-T suitable for legacy industrial systems requiring split rails while retaining the same pinout and REF functionality used in single-supply designs.
What is the maximum capacitive load the MAX4462HEUT-T can drive stably?
The MAX4462HEUT-T is specified for stable operation with up to 100 pF capacitive load, as stated in the "Maximum Capacitive Load" parameter under ELECTRICAL CHARACTERISTICS-MAX4462. Driving loads exceeding 100 pF may cause peaking or oscillation due to phase margin degradation. For heavier loads (e.g., ADC input capacitance + PCB trace), a series isolation resistor (10–50 Ω) between MAX4462HEUT-T OUT and the load is recommended to preserve stability. This limit applies across all gain versions (U/T/H) and is verified with CL = 100 pF in the -3dB bandwidth and settling time tests.
How does the gain accuracy of the MAX4462HEUT-T compare across temperature?
The MAX4462HEUT-T ('H' suffix) has a maximum gain error of ±0.15% at +25°C and ≤3.0% over the full operating temperature range of –40°C to +85°C, as specified in the ELECTRICAL CHARACTERISTICS-MAX4462 tables. This is achieved through factory laser trimming of internal thin-film resistors. Gain drift is dominated by resistor TC and remains well-controlled - making the MAX4462HEUT-T suitable for applications requiring consistent scaling without recalibration, such as calibrated pressure transmitters or portable diagnostic tools where ambient temperature varies widely during field use.
Can the MAX4462HEUT-T replace the MAX4461HEUT-T in an existing design?
No - the MAX4462HEUT-T cannot directly replace the MAX4461HEUT-T without circuit modification. While both share the same SOT23-6 package and 100× gain, the MAX4461HEUT-T uses a SHDN pin for low-power shutdown and references its output to ground, whereas the MAX4462HEUT-T uses a REF pin for output centering and has no shutdown function. Swapping them would require removing the SHDN pull-up, adding a REF voltage source, and re-biasing downstream stages. The MAX4462HEUT-T is intended for bipolar signal paths; the MAX4461HEUT-T is optimized for unipolar, power-gated applications - so replacement requires functional validation of the entire signal chain.
MAX4462HEUT-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:
- 0.25V/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-6
MAX4462HEUT-T FAQ
1.How can I place an order for MAX4462HEUT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4462HEUT-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 MAX4462HEUT-T reliable?
The price and inventory of MAX4462HEUT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4462HEUT-T is usually 5 days.
3.What payment methods are accepted for MAX4462HEUT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4462HEUT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4462HEUT-T?
MAX4462HEUT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4462HEUT-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 MAX4462HEUT-T?
For technical support, including MAX4462HEUT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4462HEUT-T requirements.
6.How does Aetrix verify that MAX4462HEUT-T is sourced from the original manufacturer or authorized distributors?
All MAX4462HEUT-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 MAX4462HEUT-T meets industry standards.
7.What is the process for return or replacement of MAX4462HEUT-T?
All MAX4462HEUT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4462HEUT-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 MAX4462HEUT-T part is unused and in its original packaging.
Return procedure for MAX4462HEUT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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