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Analog Devices Inc./Maxim Integrated MAX4462UESA
- Part No.:
- MAX4462UESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4462UESA.pdf
- Description:
- IC INST AMP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,734
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Product details
Overview
MAX4462UESA from Maxim Integrated is a fixed-gain (G = 1 V/V), rail-to-rail output instrumentation amplifier optimized for precision differential voltage amplification in single-supply systems. It features 100 µV typical input offset voltage, ±0.1% gain accuracy, 1 pA typical input bias current, and operates from 2.85V to 5.25V supply. Its REF pin enables bipolar signal handling in unipolar supplies - used in strain-gauge interfaces and low-side current sensing.
For engineers reviewing the MAX4462UESA datasheet, MAX4462UESA pinout, MAX4462UESA application, or MAX4462UESA equivalent, key selection criteria include reference-input flexibility for zero-differential output setting, ground-sensing capability with extended common-mode range (–0.1 V to VDD – 1.7 V), and guaranteed ±0.1% gain error at G = 1 across temperature.
Technical Context
The MAX4462UESA implements Maxim's proprietary indirect current-feedback architecture, converting differential input voltage to current and comparing it against a precision feedback current derived from output voltage divided by gain. This enables high CMRR (90–120 dB) and rail-to-rail output swing while maintaining ultra-low input bias current (1 pA typ).
Unlike traditional three-op-amp IAs, it supports true negative-rail input sensing (down to VSS – 0.1 V) and uses the REF pin to set output DC level independently - allowing bipolar operation (e.g., ±100 mV input at G = 1) with single 3.3 V or 5 V supply. Gain is factory-trimmed and non-adjustable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | Fixed 1 V/V - eliminates external resistor network, reduces layout sensitivity and thermal drift. |
| Input Offset Voltage | ±100 µV (typ) - enables accurate amplification of sub-mV differential signals without nulling circuitry. |
| Gain Error | ±0.1% (25°C), ±0.8% (–40°C to +85°C) - ensures predictable scaling for calibrated sensor outputs. |
| Input Bias Current | 1 pA (typ) - preserves signal integrity in high-impedance source applications (e.g., piezoresistive sensors). |
| Supply Voltage Range | 2.85 V to 5.25 V - compatible with Li-ion, 3.3 V, and 5 V logic rails without level-shifting. |
| Gain-Bandwidth Product | 2.5 MHz - supports bandwidths up to 2.5 kHz at G = 1, sufficient for industrial process control loop rates. |
| Input Common-Mode Range | VSS – 0.1 V to VDD – 1.7 V - allows direct connection to low-side shunt resistors referenced to ground or negative rail. |
| REF Input Range | VSS + 0.1 V to VDD – 1.7 V - permits flexible DC bias setting (e.g., VDD/2) for full-swing bipolar output. |
Pinout & Package
MAX4462UESA is packaged in an 8-pin SO (Small Outline) surface-mount package with standard JEDEC MO-002AC footprint. Pin 1 is OUT; Pin 2 is VSS; Pin 3 is IN+; Pins 4 and 5 are NC; Pin 6 is IN−; Pin 7 is VDD; Pin 8 is REF.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplified Output | Rail-to-rail voltage output referenced to VSS or externally set via REF; drives 100 kΩ load with <12 mV drop near rails. |
| 2 (VSS) | Negative Supply | Ground or negative rail connection; defines lower bound of input common-mode and output swing ranges. |
| 3 (IN+) | Positive Differential Input | High-impedance MOS input (2 GΩ); accepts signals down to VSS – 0.1 V - enables true low-side sensing. |
| 4, 5 (N.C.) | No Connection | Not internally bonded; must remain unconnected per datasheet to avoid parasitic coupling or latch-up. |
| 6 (IN−) | Negative Differential Input | Matched high-impedance input; forms differential pair with IN+; common-mode rejection optimized over full range. |
| 7 (VDD) | Positive Supply | Primary power input (2.85–5.25 V); powers all internal stages including REF buffer and output driver. |
| 8 (REF) | Output Reference Level | Sets DC output level for zero differential input; must be driven by low-impedance source (e.g., resistor divider or precision reference). |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed G = 1 | Eliminates external gain-setting resistors and associated matching/thermal errors - simplifies BOM and layout. |
| Reference Input (REF) | Enables bipolar output swing (e.g., ±100 mV input → ±100 mV output) using single supply - avoids dual-rail design complexity. |
| Ground-sensing input stage | Accepts common-mode voltages down to VSS – 0.1 V - supports direct interface to low-side current shunts without level shifters. |
| 1 pA input bias current | Minimizes voltage error across high-source-impedance transducers (e.g., pH electrodes, thermopiles) without guard traces. |
| Rail-to-rail output | Delivers >99% of VSS–VDD swing into 100 kΩ - maximizes dynamic range for ADC input stages. |
| 2.5 MHz GBWP | Ensures stable closed-loop response up to ~2.5 kHz at unity gain - suitable for 100 Hz–1 kHz industrial sensor bandwidths. |
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 or pressure sensors. IC Role / Device Role / Timing Role: Instrumentation amplifier providing fixed 1× gain, high CMRR, and rail-to-rail output to drive 12–16-bit SAR ADCs. Use Value: ±0.1% gain accuracy and 100 µV offset enable <0.1% full-scale measurement error without calibration; REF pin allows offset-free zero-balance adjustment. | Use Scenario: Monitoring current through shunt resistors placed between load and ground in battery-powered medical devices or motor controllers. IC Role / Device Role / Timing Role: Ground-referenced differential amplifier measuring voltage across low-value shunts (e.g., 10–100 mΩ) with minimal common-mode error. Use Value: Input common-mode range extending to VSS – 0.1 V ensures accurate sensing at near-zero load current; 1 pA bias current prevents shunt self-heating error. |
| Industrial Process Control | Battery-Powered Medical Equipment |
Use Scenario: Conditioning analog sensor outputs (e.g., RTD, thermocouple cold-junction compensation, or 4–20 mA loop receivers) in PLC analog input modules. IC Role / Device Role / Timing Role: Precision front-end IA interfacing with isolated ADCs or microcontroller analog inputs in noisy industrial environments. Use Value: 120 dB CMRR (typ) and 100 dB PSRR reject EMI and supply ripple; 700 µA quiescent current supports low-power standby modes. | Use Scenario: Signal conditioning for ECG, pulse oximeter, or glucose monitor front-ends where size, power, and DC accuracy are critical. IC Role / Device Role / Timing Role: Low-noise, low-drift IA amplifying biopotential signals prior to digitization in portable diagnostic devices. Use Value: 18 nV/√Hz input noise and 1.5 µV/°C offset drift ensure clean acquisition of µV-level physiological signals; SO package supports automated assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8221ARMZ | G = 1–1000 (pin-selectable), higher supply current (1.2 mA), no REF pin, requires external gain resistors for G ≠ 1. | Lacks REF-based bipolar output; suited for systems needing programmable gain but not zero-input offset control. | Select when variable gain is required and board space allows resistor placement; not drop-in for REF-dependent designs. |
| INA333AIDR | G = 1–1000 (pin-selectable), 50 µV max offset, 0.3 µV/°C drift, no REF pin, 50 µA supply current. | Ultra-low power and drift, but no dedicated reference input - cannot replicate MAX4462UESA's bipolar output configuration. | Prefer for battery-critical apps where gain flexibility and lowest drift outweigh need for REF-based DC level control. |
Compared with AD8221ARMZ and INA333AIDR, the MAX4462UESA uniquely provides factory-trimmed unity gain with integrated REF pin - enabling precise, resistorless bipolar signal amplification in single-supply systems where output DC level must be independently set.
Availability
MAX4462UESA 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, long-term lifecycle support, and traceable sourcing.
Supply support for MAX4462UESA 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 industrial, automotive, communications, and computing markets.
The MAX4462UESA belongs to the MAX446x family of rail-to-rail, low-power instrumentation amplifiers engineered for precision differential signal conditioning in space-constrained, single-supply applications - especially where ground-sensing and reference-controlled output are essential.
FAQ
What is the function of the REF pin on the MAX4462UESA?
The REF pin on the MAX4462UESA sets the output DC voltage for zero differential input (VIN+ = VIN−). When a stable reference voltage (e.g., VDD/2) is applied to REF, the output centers at that voltage - enabling bipolar signal amplification (e.g., ±100 mV input → ±100 mV output around REF) using only a single supply. This eliminates the need for dual-rail supplies in many sensor interfaces.
Does the MAX4462UESA support dual-supply operation?
Yes, the MAX4462UESA supports dual-supply operation with VDD and VSS ranging up to ±2.6 V. In dual-supply mode, REF should be connected to ground to establish a 0 V output center point for true bipolar operation. The input common-mode range extends from VSS – 0.1 V to VDD – 1.7 V, and the REF input range remains VSS + 0.1 V to VDD – 1.7 V.
What is the maximum capacitive load the MAX4462UESA can drive without instability?
The MAX4462UESA is stable driving up to 100 pF of capacitive load, as verified in the datasheet's Electrical Characteristics table under "Maximum Capacitive Load". Exceeding this value may cause peaking or oscillation; for heavier loads (e.g., long PCB traces or ADC input capacitance), use a series isolation resistor (typically 10–100 Ω) between MAX4462UESA output and the load.
How does the MAX4462UESA achieve ground-sensing capability?
The MAX4462UESA achieves ground-sensing capability through its proprietary indirect current-feedback architecture and MOS input stage, which allows the input common-mode voltage to extend down to VSS – 0.1 V. This enables direct connection to low-side shunt resistors or bridge circuits referenced to ground - unlike many IAs that require ≥1 V headroom above ground - making it ideal for precision current sensing in single-supply systems.
Is the gain of the MAX4462UESA adjustable, or is it fixed?
The gain of the MAX4462UESA is fixed at 1 V/V and factory-trimmed to ±0.1% accuracy at +25°C. It is not adjustable - the "U" suffix in MAX4462UESA explicitly denotes the G = 1 variant. Unlike the MAX4460 (adjustable gain) or MAX4461 (G = 1/10/100 with SHDN), the MAX4462UESA has no internal gain-selection pins or external resistor options; gain is permanently set during wafer trimming.
MAX4462UESA 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:
- 2.5 MHz
- 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
MAX4462UESA FAQ
1.How can I place an order for MAX4462UESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4462UESA 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 MAX4462UESA reliable?
The price and inventory of MAX4462UESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4462UESA is usually 5 days.
3.What payment methods are accepted for MAX4462UESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4462UESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4462UESA?
MAX4462UESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4462UESA 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 MAX4462UESA?
For technical support, including MAX4462UESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4462UESA requirements.
6.How does Aetrix verify that MAX4462UESA is sourced from the original manufacturer or authorized distributors?
All MAX4462UESA 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 MAX4462UESA meets industry standards.
7.What is the process for return or replacement of MAX4462UESA?
All MAX4462UESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4462UESA, 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 MAX4462UESA part is unused and in its original packaging.
Return procedure for MAX4462UESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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