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Analog Devices Inc./Maxim Integrated MAX4461TESA+
- Part No.:
- MAX4461TESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4461TESA+.pdf
- Description:
- IC INST AMP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:699
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Product details
Overview
The MAX4461TESA+ from Maxim Integrated is a fixed-gain (G = 10) rail-to-rail output instrumentation amplifier optimized for precision low-level differential signal amplification in single-supply systems. It features ±0.1% gain accuracy, 100µV typical input offset voltage, 1pA typical input bias current, and 2.5MHz gain-bandwidth product - enabling high-accuracy strain-gauge and transducer interface applications with 2.85V to 5.25V supply operation.
For engineers reviewing the MAX4461TESA+ datasheet, MAX4461TESA+ pinout, MAX4461TESA+ application, or MAX4461TESA+ equivalent, key selection criteria include its factory-trimmed G=10 gain, logic-controlled shutdown input (SHDN), ground-referenced output, and SO-8 package compatibility with space-constrained industrial sensor front-ends requiring stable DC precision and low quiescent current (700µA).
Technical Context
The MAX4461TESA+ implements Maxim's proprietary indirect current-feedback architecture, converting differential input voltage to current and using feedback current subtraction to achieve precision gain control without traditional three-op-amp topology limitations. This enables true ground-sensing capability while maintaining ultra-high input impedance (>2GΩ) and enhanced common-mode rejection.
It operates exclusively from a single supply (2.85V–5.25V), with SHDN pin enabling <1µA shutdown current. Its output is internally referenced to GND, supporting unipolar signal chains; gain is fixed at 10 (suffix 'T') and factory-trimmed to ±0.1% over temperature, eliminating external resistor networks required by adjustable-gain variants like the MAX4460.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | Fixed 10 V/V, factory-trimmed to ±0.1% accuracy - eliminates gain-setting resistor tolerance errors and layout sensitivity. |
| Input Offset Voltage | 100 µV typical (±500 µV max at +25°C) - ensures sub-mV error in 10mV-range sensor outputs (e.g., load cells). |
| Input Bias Current | 1 pA typical - preserves signal integrity in high-impedance sources (e.g., piezoresistive sensors, pH electrodes). |
| Supply Current | 700 µA typical at 5V - enables battery-powered medical devices and portable instrumentation with >1-year runtime on coin cells. |
| Gain-Bandwidth Product | 2.5 MHz - supports 25 kHz closed-loop bandwidth at G=10, sufficient for dynamic strain monitoring and audio preamplification. |
| Input Common-Mode Range | -0.1 V to (VDD – 1.7 V) - allows direct interfacing to grounded shunt resistors or bridge midpoints down to 0 V. |
| Output Swing | Rail-to-rail (within 2.5 mV of rails at RL = 20kΩ) - maximizes dynamic range in 3.3V/5V systems without level-shifting circuitry. |
Pinout & Package
MAX4461TESA+ is housed in an 8-pin SO (Small Outline) package with standard JEDEC MO-002AC footprint (5.0 mm × 4.0 mm, 1.27 mm pitch). Pin 1 is marked with a beveled corner or dot; exposed pad is absent (SO variant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplified Output | Delivers rail-to-rail voltage proportional to (IN+ − IN−) × 10; high-impedance in shutdown mode. |
| 2 (GND) | Negative Supply Reference | Ground return for supply, inputs, and output reference - must be low-impedance connection to minimize CMRR degradation. |
| 3 (IN+) | Positive Differential Input | High-impedance MOS input (2 GΩ) accepting small-signal voltages within common-mode range. |
| 4 (N.C.) | No Connection | Not internally bonded - leave unconnected; no routing or thermal relief required. |
| 5 (N.C.) | No Connection | Not internally bonded - electrically isolated; may be used as thermal pad or keep-out zone. |
| 6 (IN−) | Negative Differential Input | Matched high-impedance input to IN+; differential pair rejects common-mode noise up to 120 dB. |
| 7 (VDD) | Positive Supply | Accepts 2.85V–5.25V single supply; bypass with 0.1 µF ceramic capacitor near pin for stability. |
| 8 (SHDN) | Shutdown Control | CMOS-compatible input: drive ≥0.7×VDD for active mode, ≤0.3×VDD for <1 µA shutdown current. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-Trimmed Gain | G = 10 with ±0.1% accuracy over temperature - removes external resistor matching requirements and PCB area for gain-setting network. |
| Ultra-Low Input Bias Current | 1 pA typical - prevents loading of high-Z sensor elements (e.g., thermopiles, electrochemical cells), preserving signal fidelity. |
| Ground-Sensing Input Stage | Operates with inputs down to -0.1 V relative to GND - enables direct connection to low-side current-sense shunts without level shifters. |
| Logic-Controlled Shutdown | Reduces supply current to <1 µA while maintaining high-Z output - ideal for duty-cycled sensor acquisition in IoT edge nodes. |
| Rail-to-Rail Output | Swings within 2.5 mV of VDD/GND at 20kΩ load - delivers full-scale resolution in 12-bit+ ADC interfaces without supply headroom loss. |
Applications
| Industrial Process Control | Strain-Gauge Amplifiers |
|---|---|
Use Scenario: Monitoring pressure transducers in HVAC control panels with 4–20mA loop integration. IC Role / Device Role / Timing Role: Precision front-end amplifier conditioning millivolt-level Wheatstone bridge outputs into 0–5V ratiometric signals for microcontroller ADCs. Use Value: ±0.1% gain accuracy and 100µV offset ensure <0.2% total system error across 0–100°C ambient range without calibration. | Use Scenario: Load-cell signal conditioning in portable weighing scales powered by two AA batteries. IC Role / Device Role / Timing Role: Fixed-gain instrumentation amplifier driving SAR ADC with minimal external components and low power budget. Use Value: 700µA quiescent current extends battery life beyond 18 months; rail-to-rail output fully utilizes 3.3V ADC reference. |
| Transducer Interface | Precision Low-Side Current Sense |
Use Scenario: Isolation-free current measurement in motor driver PCBs using Hall-effect sensors. IC Role / Device Role / Timing Role: High-CMRR amplifier rejecting PWM switching noise while amplifying sensor output for real-time torque estimation. Use Value: 120 dB CMRR at DC and 90 dB at 10kHz suppresses EMI from adjacent 20kHz gate drivers. | Use Scenario: Battery discharge monitoring in medical infusion pumps with shunt-based sensing. IC Role / Device Role / Timing Role: Ground-referenced differential amplifier measuring voltage drop across 10mΩ shunt with zero input offset impact. Use Value: 100µV offset contributes <1% error at 10A full scale; input common-mode range includes 0V, enabling true low-side placement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA126PA | Three-op-amp topology; G = 1–10,000 via external resistor; 125µV offset; 500µA IQ; SO-8 package. | Requires external gain resistor; lacks shutdown; lower CMRR (100 dB) and higher offset drift. | Select when programmable gain or dual-supply operation is needed; not drop-in for MAX4461TESA+ due to different pinout and biasing. |
| AD8221ARMZ | Three-op-amp design; G = 1–1000 via external resistor; 25µV offset; 1.2mA IQ; MSOP-8 package. | Higher precision offset but larger supply current; no shutdown; requires external gain network. | Choose for ultra-low-offset critical applications where board space permits MSOP-8 and additional resistors; not pin-compatible. |
Compared with INA126PA and AD8221ARMZ, the MAX4461TESA+ offers superior integration (fixed G=10, built-in shutdown), lower power (700µA vs. ≥500µA), and smaller solution size - making it optimal for cost-sensitive, space-constrained, battery-operated sensor nodes where gain stability and low IQ dominate over ultra-low offset.
Availability
MAX4461TESA+ is available at Aetrix Electronics and suitable for industrial process control, strain-gauge amplification, and precision low-side current sensing requiring stable component supply across extended temperature ranges (-40°C to +85°C) and long production lifecycles.
Supply support for MAX4461TESA+ 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 precision analog and mixed-signal ICs for demanding industrial, medical, and communications applications.
The MAX4461 series belongs to Maxim's instrumentation amplifier product line, engineered specifically for low-power, single-supply sensor signal conditioning - emphasizing ground-sensing capability, ultra-low input current, and factory-trimmed gain accuracy in miniature packages.
FAQ
What is the gain setting of the MAX4461TESA+ and how is it implemented?
The MAX4461TESA+ has a fixed gain of 10 V/V, denoted by the 'T' suffix in its part number. This gain is factory-trimmed using laser calibration during wafer sort, achieving ±0.1% accuracy over temperature without any external resistors. Unlike the MAX4460, the MAX4461TESA+ does not require FB pin connections or gain-setting networks - simplifying layout and improving long-term stability.
Does the MAX4461TESA+ support dual-supply operation?
No, the MAX4461TESA+ is specified only for single-supply operation from 2.85V to 5.25V. Its internal architecture references all signals to GND, and the SHDN pin logic levels are defined relative to VDD and GND. For dual-supply applications requiring bipolar input/output swing, consider the MAX4462HESA or similar variants with REF pin functionality.
What is the function of the SHDN pin on the MAX4461TESA+?
The SHDN (shutdown) pin on the MAX4461TESA+ is a CMOS-compatible digital input that disables internal transconductance stages when pulled low (≤0.3×VDD), reducing supply current to <1 µA. During shutdown, the output enters high-impedance state. Drive SHDN ≥0.7×VDD for normal operation. This feature enables power cycling in battery-powered systems without external switches.
Can the MAX4461TESA+ be used with grounded sensor bridges?
Yes - the MAX4461TESA+ features true ground-sensing capability: its input common-mode range extends to -0.1 V relative to GND, allowing direct connection to low-side shunt resistors or grounded Wheatstone bridge configurations. This eliminates the need for level-shifting circuitry and preserves CMRR performance in single-supply industrial sensor interfaces.
What package type is used for the MAX4461TESA+ and what are its key mechanical dimensions?
The MAX4461TESA+ uses an 8-pin SO (Small Outline) package per JEDEC MO-002AC standard: body size 5.0 mm × 4.0 mm, lead pitch 1.27 mm, total length including leads ~6.2 mm. It has no exposed thermal pad. This package is compatible with standard reflow profiles and automated optical inspection (AOI), supporting high-volume manufacturing of compact sensor modules.
MAX4461TESA+ 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:
- 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:
- 250 kHz
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 50 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
MAX4461TESA+ FAQ
1.How can I place an order for MAX4461TESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4461TESA+ 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 MAX4461TESA+ reliable?
The price and inventory of MAX4461TESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4461TESA+ is usually 5 days.
3.What payment methods are accepted for MAX4461TESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4461TESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4461TESA+?
MAX4461TESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4461TESA+ 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 MAX4461TESA+?
For technical support, including MAX4461TESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4461TESA+ requirements.
6.How does Aetrix verify that MAX4461TESA+ is sourced from the original manufacturer or authorized distributors?
All MAX4461TESA+ 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 MAX4461TESA+ meets industry standards.
7.What is the process for return or replacement of MAX4461TESA+?
All MAX4461TESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4461TESA+, 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 MAX4461TESA+ part is unused and in its original packaging.
Return procedure for MAX4461TESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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