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Analog Devices Inc./Maxim Integrated MAX4461HESA
- Part No.:
- MAX4461HESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4461HESA.pdf
- Description:
- IC INST AMP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,606
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Product details
Overview
MAX4461HESA from Maxim Integrated is a precision rail-to-rail output instrumentation amplifier with fixed gain of 100 V/V, ±0.15% typical gain error at 25°C, 100 µV typical input offset voltage, and 2.5 MHz gain-bandwidth product. It operates from a single 2.85V to 5.25V supply, draws only 700 µA quiescent current, and features logic-controlled shutdown (SHDN) for <1 µA standby current-ideal for low-power strain-gauge and transducer interface circuits.
For engineers reviewing the MAX4461HESA datasheet, MAX4461HESA pinout, MAX4461HESA application, or MAX4461HESA equivalent, this page delivers verified circuit role (precision differential voltage amplification), package mapping (8-pin SO), thermal and electrical specs across temperature, shutdown behavior, and real-world design trade-offs versus alternatives.
Technical Context
The MAX4461HESA implements Maxim's proprietary indirect current-feedback architecture, enabling ground-sensing capability while maintaining ultra-low 1 pA typical input bias current and high common-mode rejection (90–120 dB). Its fixed 100 V/V gain is factory-trimmed and laser-calibrated for ±0.15% typical error at 25°C and ≤0.6% max over -40°C to +85°C.
It uses a single-ended ground-referenced output stage with rail-to-rail swing, supports input common-mode range from -0.1 V to (VDD – 1.7 V), and integrates a dedicated SHDN pin that disables internal transconductance stages-reducing supply current to <1 µA without affecting external feedback network integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | Fixed 100 V/V - eliminates external resistor selection errors and layout sensitivity in high-accuracy signal chains. |
| Gain Error (25°C) | ±0.15% typical - ensures <±150 µV output error for 10 mV differential input, critical for 16-bit+ ADC interfacing. |
| Input Offset Voltage | 100 µV typical - enables resolution of sub-100 µV differential signals after amplification (e.g., 1 mV input → 100 mV output). |
| Supply Current | 700 µA typical at 5 V - supports battery-powered medical sensors and portable industrial monitors with multi-day runtime. |
| Shutdown Current | <1 µA at 5 V - allows microcontroller-gated power cycling without PCB-level rework or external switches. |
| Gain-Bandwidth Product | 2.5 MHz - supports 25 kHz small-signal bandwidth at G = 100, sufficient for DC–20 kHz sensor conditioning including strain gauges and RTDs. |
| Input Bias Current | 1 pA typical - preserves signal integrity when amplifying high-impedance sources (e.g., piezoelectric sensors, pH electrodes). |
Pinout & Package
MAX4461HESA is housed in an 8-pin SO (Small Outline) package with standard JEDEC MS-012AC footprint (5.0 mm × 4.0 mm, 1.75 mm height). Pin 1 is OUT; Pin 2 is GND; Pin 3 is IN+; Pins 4 and 5 are NC; Pin 6 is IN−; Pin 7 is VDD; Pin 8 is SHDN.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplified Output | Rail-to-rail voltage source referenced to GND; drives 20 kΩ load with <0.25 mV VOL and <8 mV VOH at 25°C. |
| 2 (GND) | Negative Supply Reference | Ground-sensing node; defines output zero point and input common-mode lower bound (–0.1 V min). |
| 3 (IN+) | Positive Differential Input | High-impedance MOS gate (1 pA IB); accepts differential signals up to ±48 mV at G = 100 with full accuracy. |
| 4, 5 (N.C.) | No Connection | Not internally bonded; must remain unconnected per datasheet to avoid parasitic coupling or latch-up risk. |
| 6 (IN−) | Negative Differential Input | Matched to IN+; enables true differential acquisition with >90 dB CMRR up to 10 kHz. |
| 7 (VDD) | Positive Supply Input | Accepts 2.85–5.25 V single supply; PSRR >80 dB ensures immunity to digital noise on shared rails. |
| 8 (SHDN) | Logic-Controlled Shutdown | Active-low enable: <0.3×VDD = low (shutdown), >0.7×VDD = high (active); input leakage <100 pA preserves low-power integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-Trimmed Gain | 100 V/V with ±0.15% typical error at 25°C - eliminates gain calibration step in production test and reduces BOM count. |
| Ultra-Low Input Bias Current | 1 pA typical - prevents loading errors on high-Z sensors (e.g., thermopiles, electrochemical cells) and enables stable DC-coupled operation. |
| Rail-to-Rail Output Swing | Drives to within 0.25 mV of GND and 8 mV of VDD at 20 kΩ - maximizes dynamic range for 12–16-bit ADCs powered from same supply. |
| Ground-Sensing Input Stage | Common-mode range extends to –0.1 V below GND - supports low-side current sensing and single-supply bridge interfaces without level-shifting. |
| Integrated Shutdown Control | SHDN pin reduces IDD to <1 µA while preserving pinout compatibility - enables firmware-controlled power gating in portable equipment. |
Applications
| Strain-Gauge Amplifier | Transducer Interface |
|---|---|
|
Use Scenario: Amplifying mV-level Wheatstone bridge outputs from load cells or pressure sensors in industrial weighing systems. IC Role / Device Role / Timing Role: Precision instrumentation amplifier providing fixed 100× gain, low drift, and high CMRR to reject bridge excitation noise and thermal EMF. Use Value: Delivers <±150 µV total output error at 25°C, enabling 16-bit effective resolution without post-amplifier trimming or software correction. |
Use Scenario: Conditioning analog outputs from RTDs, thermistors, or capacitive humidity sensors in HVAC controllers. IC Role / Device Role / Timing Role: Low-noise, rail-to-rail output amplifier with ground-referenced output and wide input common-mode range (–0.1 V to VDD–1.7 V). Use Value: Supports direct connection to single-supply ADCs (e.g., ADS1115) without level-shifting, reducing component count and board area by ≥30%. |
| Precision Low-Side Current Sense | Battery-Powered Medical Equipment |
|
Use Scenario: Measuring motor phase current or battery discharge current via shunt resistor in 3.3 V embedded systems. IC Role / Device Role / Timing Role: Ground-sensing instrumentation amplifier rejecting common-mode voltage up to VDD–1.7 V while amplifying µV–mV differential drops. Use Value: Enables accurate 10 mA–10 A current measurement with <1% gain error and no external level-shift circuitry. |
Use Scenario: Signal conditioning for ECG/EEG front-ends or portable pulse oximeters requiring long battery life and low noise. IC Role / Device Role / Timing Role: Low-power (700 µA), low-noise (18 nV/√Hz) amplifier with shutdown mode for intermittent sampling. Use Value: Extends coin-cell battery life to >12 months in wearable devices by reducing active time and enabling µA-level sleep states. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA128UA | Fixed G = 1000 (not 100); higher 125 µV VOS; 1250 µA IDD; no shutdown; SO-8 package. | Requires external attenuation for 100× gain; less suitable for low-power or space-constrained designs. | Select only if system requires G = 1000 and can accommodate higher supply current and no shutdown control. |
| AD8221ARMZ | G = 10–1000 via external resistor; 25 µV VOS; 1000 µA IDD; no shutdown; MSOP-8 package. | Requires precision external resistors; better offset but higher power and no integrated low-power mode. | Prefer when adjustable gain and superior offset performance justify added BOM cost and layout complexity. |
Compared with INA128UA and AD8221ARMZ, MAX4461HESA uniquely combines factory-trimmed 100× gain, sub-µA shutdown, and 1 pA input bias in an SO-8 package-making it optimal for compact, battery-sensitive instrumentation where gain stability and power efficiency are primary constraints.
Availability
MAX4461HESA is available at Aetrix Electronics and suitable for industrial process control, strain-gauge amplifiers, and precision low-side current sense applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX4461HESA 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 communication systems.
The MAX4461HESA belongs to the MAX4460/MAX4461/MAX4462 family-engineered for single-supply, rail-to-rail instrumentation tasks in space-constrained, low-power industrial and medical applications.
FAQ
What is the gain configuration of MAX4461HESA?
The MAX4461HESA has a fixed gain of 100 V/V, factory-laser-trimmed and specified with ±0.15% typical gain error at +25°C. This eliminates external gain-setting resistors and associated tolerance, temperature drift, and layout-induced errors-ensuring consistent performance across production units without calibration.
Does MAX4461HESA support dual-supply operation?
No. The MAX4461HESA is designed exclusively for single-supply operation from 2.85 V to 5.25 V. Its output is ground-referenced, and its input common-mode range extends down to –0.1 V relative to GND. For dual-supply applications requiring bipolar output swing, consider the MAX4462HESA instead.
What is the function of the SHDN pin on MAX4461HESA?
The SHDN pin on MAX4461HESA is an active-low logic input that places the amplifier into ultra-low-power shutdown mode (<1 µA supply current) when pulled to GND. When driven high (>0.7×VDD), it enables normal operation. The output becomes high-impedance in shutdown, preserving external load integrity.
Can MAX4461HESA drive heavy capacitive loads?
The MAX4461HESA is stable with up to 100 pF capacitive load, as confirmed in the datasheet's Electrical Characteristics table. Driving larger capacitances may cause peaking or oscillation; for >100 pF loads (e.g., long cables or ADC input filters), add a series isolation resistor (10–100 Ω) between OUT and the load.
What is the maximum input differential voltage for MAX4461HESA at G = 100?
At G = 100, the MAX4461HESA is specified for differential input voltages from 2 mV to 48 mV to maintain full accuracy (gain error, nonlinearity, offset). While it can tolerate larger inputs, performance degrades beyond this range-especially near output saturation limits or under heavy loading conditions.
MAX4461HESA 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:
- 0.25V/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:
- 8-SOIC
MAX4461HESA FAQ
1.How can I place an order for MAX4461HESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4461HESA 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 MAX4461HESA reliable?
The price and inventory of MAX4461HESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4461HESA is usually 5 days.
3.What payment methods are accepted for MAX4461HESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4461HESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4461HESA?
MAX4461HESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4461HESA 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 MAX4461HESA?
For technical support, including MAX4461HESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4461HESA requirements.
6.How does Aetrix verify that MAX4461HESA is sourced from the original manufacturer or authorized distributors?
All MAX4461HESA 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 MAX4461HESA meets industry standards.
7.What is the process for return or replacement of MAX4461HESA?
All MAX4461HESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4461HESA, 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 MAX4461HESA part is unused and in its original packaging.
Return procedure for MAX4461HESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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