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Analog Devices Inc./Maxim Integrated MAX4043EUB-T
- Part No.:
- MAX4043EUB-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4043EUB-T.pdf
- Description:
- IC OPAMP GP 2 CIRC 10UMAX/USOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,154
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Product details
Overview
The MAX4043EUB-T from Maxim Integrated is a dual, micropower, rail-to-rail input/output operational amplifier optimized for battery-powered systems. It operates from a single +2.4V to +5.5V supply, draws only 10µA per amplifier, delivers 90kHz gain-bandwidth, and features shutdown mode reducing current to <1µA while forcing outputs into high-impedance state - enabling precision sensor signal conditioning in portable medical monitors.
For engineers reviewing the MAX4043EUB-T datasheet, MAX4043EUB-T pinout, MAX4043EUB-T application, or MAX4043EUB-T equivalent, key selection criteria include ultra-low quiescent current, rail-to-rail I/O swing within 10mV of rails (100kΩ load), shutdown logic compatibility (VIH = 0.7×VCC, VIL = 0.3×VCC), and guaranteed operation across –40°C to +85°C.
Technical Context
The MAX4043EUB-T implements a composite NPN/PNP rail-to-rail input stage with crossover at mid-supply, enabling full common-mode range from VEE to VCC. Its output stage uses complementary MOSFETs to achieve rail-to-rail swing under 25kΩ load while maintaining linearity up to ±200mV from rails.
It integrates dedicated SHDN control logic referenced to VCC/2, enabling reliable low-power disable with 50µs shutdown time and 150µs enable time. Input protection includes 2.2kΩ series resistors and back-to-back diode stacks, limiting differential input current above 1.8V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.4V to +5.5V single supply - supports direct connection to decaying Li-ion or alkaline battery stacks without regulation. |
| Quiescent Current | 10µA per amplifier - enables multi-year operation on coin-cell batteries in always-on sensor nodes. |
| Shutdown Current | <1µA per amplifier - reduces system standby power by >90% while preserving high-impedance output state. |
| Gain-Bandwidth Product | 90kHz - sufficient for DC-coupled strain gauge, thermistor, and pH sensor amplification with stable unity-gain response. |
| Input Offset Voltage | ±200µV (typ) - ensures sub-0.1% error in 12-bit ADC front-ends with 100mV full-scale signals. |
| Rail-to-Rail Output Swing | Within 10mV of rails (100kΩ load) - maximizes dynamic range for low-voltage ADCs operating at 2.5V or 3.3V. |
| Input Common-Mode Range | VEE to VCC - allows direct sensing of ground-referenced or rail-referenced transducer outputs without level-shifting. |
Pinout & Package
The MAX4043EUB-T is housed in a 10-pin µMAX® package (3mm × 3mm, 0.5mm pitch), pin-compatible with industry-standard 10-lead µSOP footprints and suitable for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 10 | VCC | Positive supply input - must be bypassed with 100nF capacitor to VEE for stability. |
| 2, 9 | INB− / INA− | Inverting inputs for Amplifier B and A - matched impedance required to minimize bias-current-induced offset. |
| 3, 8 | INB+ / INA+ | Noninverting inputs for Amplifier B and A - accept signals from VEE to VCC without phase reversal. |
| 4, 7 | OUTB / OUTA | Amplifier B and A outputs - enter high-impedance state during shutdown (SHDN = VEE). |
| 5, 6 | SHDNB / SHDNA | Independent shutdown controls for each amplifier - logic-high (≥0.7×VCC) enables, logic-low (≤0.3×VCC) disables. |
| VEE (Pin 10 not used) | Negative supply | Tied to ground in single-supply mode - serves as reference for input common-mode and output swing. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Enables direct interface with unbuffered sensors whose output spans ground to supply voltage. |
| Output swing within 10mV of rails (100kΩ) | Preserves >99% of available signal range for 12-bit+ ADCs operating at 2.4V–5.5V supplies. |
| No phase reversal on overdriven inputs | Prevents latch-up or erroneous output transitions when input exceeds supply rails - critical for fault-tolerant sensor interfaces. |
| Unity-gain stable with ≤200pF capacitive load | Allows direct driving of ADC input capacitance or long PCB traces without external isolation resistors. |
| Input offset voltage drift of 2µV/°C | Ensures <1mV total offset variation across –40°C to +85°C - suitable for industrial temperature monitoring. |
Applications
| Wearable Vital Sign Monitor | Portable Gas Detector |
|---|---|
Use Scenario: Amplifying microvolt-level ECG signals from dry electrodes in a wrist-worn health tracker powered by a CR2032 coin cell. IC Role / Device Role / Timing Role: Dual-channel instrumentation amplifier front-end providing rail-to-rail DC-coupled gain with independent shutdown per channel to manage power budget. Use Value: 10µA per amplifier and <1µA shutdown current extend battery life beyond 12 months while maintaining 10mV output swing resolution. | Use Scenario: Conditioning output from electrochemical gas sensors (e.g., CO, NO₂) with low output current (<100nA) and wide temperature range (–20°C to +50°C). IC Role / Device Role / Timing Role: Low-bias-current transimpedance amplifier converting sensor current to voltage, leveraging 2nA max input bias and rail-to-rail output for full ADC utilization. Use Value: ±200µV input offset and 2µV/°C drift ensure <0.5% full-scale error across operating temperature without calibration. |
| Digital Multimeter Front-End | Smart Home Environmental Sensor Hub |
Use Scenario: Precision DC voltage measurement in handheld DMMs using auto-ranging architecture with multiple gain stages. IC Role / Device Role / Timing Role: Dual op-amp configured as programmable-gain amplifier and buffer, exploiting matched channels and shutdown to isolate unused paths. Use Value: Channel-to-channel isolation >80dB prevents crosstalk between voltage and current measurement paths during simultaneous sampling. | Use Scenario: Simultaneous analog conditioning of temperature (NTC), humidity (capacitive), and air quality (MOS) sensor outputs in a battery-powered smart thermostat. IC Role / Device Role / Timing Role: Multi-sensor signal conditioner with independent shutdown per channel to cycle active sensors and minimize average current draw. Use Value: Independent SHDNA/SHDNB pins allow staggered wake-up of sensor channels, achieving 2.5µA average system current in sleep mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual micropower rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2462IDR | Higher supply current (225µA vs. 10µA), wider GBW (6.4MHz), no shutdown mode | Better for higher-speed signal chains but incompatible with multi-year battery life requirements | Select only if bandwidth >100kHz is mandatory and power budget permits >20× higher quiescent current |
| LPV521MG/NOPB | Lower supply current (320nA), lower GBW (6.5kHz), single-channel only, no shutdown | Suitable for ultra-low-power single-sensor nodes but lacks dual-channel integration and shutdown control | Choose when minimizing standby current is paramount and dual-channel operation is unnecessary |
Compared with TLV2462IDR and LPV521MG/NOPB, the MAX4043EUB-T uniquely balances 10µA quiescent current, dual-channel integration, independent shutdown, and 90kHz bandwidth - making it optimal for multi-sensor, battery-operated systems requiring coordinated power management and precision DC gain.
Availability
The MAX4043EUB-T is available at Aetrix Electronics and suitable for wearable health monitors, portable environmental sensors, and handheld test equipment requiring stable component supply with guaranteed –40°C to +85°C operation and long-term production continuity.
Supply support for MAX4043EUB-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 precision analog, mixed-signal, and power-management ICs for demanding industrial, medical, and communications applications.
The MAX4040–MAX4044 family was engineered specifically for ultra-low-power, rail-to-rail signal conditioning in portable and battery-powered systems - emphasizing micropower operation, wide supply range, and robust input/output performance at minimal silicon area.
FAQ
What is the maximum capacitive load the MAX4043EUB-T can drive without external compensation?
The MAX4043EUB-T is unity-gain stable with capacitive loads up to 200pF, as verified in the Load Resistor vs. Capacitive Load graph (Figure 20) of the datasheet. Driving larger capacitive loads requires an isolation resistor (e.g., 1kΩ) between the output and load to prevent peaking or oscillation, though this introduces gain error due to voltage division with the load resistance.
Does the MAX4043EUB-T support true single-supply operation down to 2.4V?
Yes, the MAX4043EUB-T is fully specified for single-supply operation from +2.4V to +5.5V, with all key parameters - including rail-to-rail input common-mode range (VEE to VCC), output swing (within 10mV of rails), and 10µA supply current - guaranteed across this range at –40°C to +85°C.
How does the shutdown function behave on the MAX4043EUB-T?
The MAX4043EUB-T features two independent shutdown pins (SHDNA and SHDNB). Pulling either pin to VEE (≤0.3×VCC) disables its respective amplifier, reducing supply current to <1µA and placing the output in high-impedance state. Pulling to VCC (≥0.7×VCC) enables normal operation. The logic threshold is referenced to VCC/2, not ground.
Can the MAX4043EUB-T be used as a comparator, and what is its typical propagation delay?
Yes, the MAX4043EUB-T can operate as a rail-to-rail I/O comparator. Propagation delay depends on input overdrive: at VCC = +5V and 100mV overdrive, tPD is ~30µs; at VCC = +2.4V and same overdrive, tPD increases to ~65µs (per Figure 7). External hysteresis is recommended to prevent oscillation near threshold.
What is the input bias current behavior of the MAX4043EUB-T across common-mode voltage?
The MAX4043EUB-T uses a composite NPN/PNP input stage, causing input bias current polarity to reverse near VCC/2. At VCM = 0V, IB ≈ +2nA; at VCM = VCC, IB ≈ –2nA (Figure 5). To minimize offset, match source impedances seen by IN+ and IN−, especially in high-impedance sensor interfaces like pH electrodes or photodiodes.
MAX4043EUB-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.04V/µs
- Gain Bandwidth Product:
- 90 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 2 nA
- Voltage - Input Offset:
- 250 µV
- Current - Supply:
- 14µA (x2 Channels)
- Current - Output / Channel:
- 2.5 mA
- Voltage - Supply Span (Min):
- 2.4 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-uMAX/uSOP
MAX4043EUB-T FAQ
1.How can I place an order for MAX4043EUB-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4043EUB-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 MAX4043EUB-T reliable?
The price and inventory of MAX4043EUB-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4043EUB-T is usually 5 days.
3.What payment methods are accepted for MAX4043EUB-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4043EUB-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4043EUB-T?
MAX4043EUB-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4043EUB-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 MAX4043EUB-T?
For technical support, including MAX4043EUB-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4043EUB-T requirements.
6.How does Aetrix verify that MAX4043EUB-T is sourced from the original manufacturer or authorized distributors?
All MAX4043EUB-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 MAX4043EUB-T meets industry standards.
7.What is the process for return or replacement of MAX4043EUB-T?
All MAX4043EUB-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4043EUB-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 MAX4043EUB-T part is unused and in its original packaging.
Return procedure for MAX4043EUB-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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