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Analog Devices Inc./Maxim Integrated MAX4042ESA+T
- Part No.:
- MAX4042ESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4042ESA+T.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:5,643
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Product details
Overview
MAX4042ESA+T from Maxim Integrated is a dual micropower rail-to-rail input/output operational amplifier optimized for low-voltage, battery-powered systems. It operates from a single +2.4V to +5.5V supply, draws only 10µA per amplifier, delivers 90kHz gain-bandwidth product, and achieves rail-to-rail output swing within 10mV of rails with 100kΩ load - enabling precision signal conditioning in portable medical sensors and handheld instrumentation.
For engineers reviewing the MAX4042ESA+T datasheet, MAX4042ESA+T pinout, MAX4042ESA+T application, or MAX4042ESA+T equivalent, key selection criteria include ultra-low quiescent current, guaranteed rail-to-rail I/O performance across –40°C to +85°C, dual-channel integration in 8-pin SO package, and compatibility with capacitive loads up to 200pF without external compensation.
Technical Context
The MAX4042ESA+T implements a composite NPN/PNP rail-to-rail input stage that extends common-mode range from VEE to VCC, with crossover at mid-supply and typical 200µV input offset voltage. Its output stage uses complementary push-pull topology capable of sourcing/sinking current to drive 25kΩ loads while maintaining <60mV rail margin.
Each amplifier features unity-gain stability with capacitive loads ≤200pF, no phase reversal under overdriven inputs, and high open-loop gain (94dB typ) - making it suitable for low-noise, low-distortion amplification in high-impedance sensor interfaces where power and headroom are constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.4V to +5.5V single supply - enables direct operation from Li-ion, alkaline, or coin-cell batteries without regulation. |
| Supply Current per Amp | 10µA - supports multi-year battery life in always-on wearable health monitors. |
| Gain-Bandwidth Product | 90kHz - sufficient for DC–10kHz sensor signal conditioning (e.g., strain gauges, thermopiles). |
| Input Offset Voltage | ±200µV max - ensures <0.5% error in 12-bit ADC front-ends with 2.5V reference. |
| Output Swing (100kΩ) | Within 10mV of rails - maximizes dynamic range in single-supply systems with limited headroom. |
| CMRR / PSRR | 75dB / 85dB min - rejects battery voltage decay and supply noise in portable equipment. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and automotive cabin ambient environments. |
Pinout & Package
MAX4042ESA+T is housed in an 8-pin SO (Small Outline) package, measuring 4.9mm × 3.9mm × 1.75mm, with standard JEDEC MS-012AC footprint and gull-wing leads for reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUTA) | Amplifier A output | High-impedance during shutdown; rail-to-rail swing supports full-scale ADC input drive. |
| 2 (IN–A) | Inverting input of Amp A | Protected by 2.2kΩ series resistors and back-to-back diodes - withstands ±5V differential transients. |
| 3 (IN+A) | Noninverting input of Amp A | Matches IN–A impedance; bias current polarity inversion at mid-supply requires balanced source impedances. |
| 4 (VEE) | Negative supply / ground | Tied to GND in single-supply mode; establishes reference for rail-to-rail input common-mode range. |
| 5 (IN–B) | Inverting input of Amp B | Electrically isolated from Amp A inputs - enables independent differential sensing channels. |
| 6 (IN+B) | Noninverting input of Amp B | Same input structure as IN+A; channel-to-channel isolation >80dB prevents crosstalk in dual-sensor systems. |
| 7 (OUTB) | Amplifier B output | Independent output stage; no internal coupling - allows simultaneous use with OUTA for stereo or dual-path processing. |
| 8 (VCC) | Positive supply | Accepts 2.4–5.5V; internal regulation not required - simplifies power architecture in space-constrained designs. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Extends from VEE to VCC - eliminates level-shifting circuitry when interfacing with unbuffered sensors. |
| Output swing within 10mV of rails (100kΩ) | Preserves >99% of available signal range in 3.3V systems - critical for maximizing SNR in low-voltage data acquisition. |
| No phase reversal on overdrive | Prevents latch-up or erroneous output states during sensor saturation - improves reliability in overload-prone applications. |
| Unity-gain stable with 200pF capacitive load | Enables direct driving of ADC input capacitors or long PCB traces without isolation resistors or compensation networks. |
| 200µV max input offset voltage | Reduces calibration burden in precision measurement systems - supports factory-trim-free designs for cost-sensitive products. |
Applications
| Portable ECG Monitor | Smart Digital Scale |
|---|---|
Use Scenario: Amplifying microvolt-level biopotential signals from dry electrodes in a battery-powered wearable ECG patch. IC Role / Device Role / Timing Role: Dual-channel instrumentation amplifier front-end providing gain, filtering, and rail-to-rail buffering before 12-bit SAR ADC sampling. Use Value: 10µA per amplifier extends battery life beyond 12 months; rail-to-rail I/O captures full ECG waveform amplitude without clipping. |
Use Scenario: Conditioning mV-level bridge output from load cells in a rechargeable kitchen scale with LCD display. IC Role / Device Role / Timing Role: Dual op amp configured as precision difference amplifier and reference buffer for 24-bit delta-sigma ADC. Use Value: ±200µV offset ensures <1g accuracy at 5kg full scale; 85dB PSRR rejects ripple from switching charger IC. |
| Handheld Gas Detector | Industrial Temperature Transmitter |
Use Scenario: Signal conditioning for electrochemical gas sensor output in a portable safety instrument powered by two AA cells. IC Role / Device Role / Timing Role: Low-power transimpedance amplifier converting nanoamp sensor current to voltage, followed by gain stage. Use Value: 90kHz GBW supports fast response to gas concentration changes; 2.4V minimum supply allows operation until battery reaches 1.2V/cell. |
Use Scenario: Amplifying RTD or thermistor signals in a 4–20mA loop-powered transmitter operating in factory environments. IC Role / Device Role / Timing Role: Precision buffer and excitation current source driver for 3-wire RTD interface with cold-junction compensation. Use Value: –40°C to +85°C rating ensures stability across ambient extremes; 75dB CMRR rejects common-mode noise from motor drives nearby. |
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/amp), wider GBW (6.4MHz), but same SO-8 package and rail-to-rail I/O. | Better for higher-frequency sensor interfaces (e.g., ultrasonic transducers); unsuitable for multi-year battery life requirements. | Select TLV2462IDR only when bandwidth >100kHz is mandatory and power budget allows ≥20× higher quiescent draw. |
| AD8602ARZ | Lower offset (50µV max), lower noise (12nV/√Hz), but 100µA supply current and no guaranteed rail-to-rail input below 1.2V. | Preferred for precision weighing or analytical instrumentation where offset drift dominates error budget. | Choose AD8602ARZ when offset voltage and noise are primary constraints, and system can tolerate higher power and reduced low-VCC headroom. |
Compared with TLV2462IDR and AD8602ARZ, the MAX4042ESA+T uniquely balances sub-10µA quiescent current, guaranteed rail-to-rail operation down to 2.4V, and 90kHz bandwidth - making it the optimal choice for ultra-low-power, wide-supply-range dual-channel analog front-ends where longevity and headroom are non-negotiable.
Availability
MAX4042ESA+T is available at Aetrix Electronics and suitable for portable ECG monitors, smart digital scales, handheld gas detectors, industrial temperature transmitters, and battery-powered sensor nodes requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for MAX4042ESA+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The MAX4040–MAX4044 family was designed specifically for micropower, rail-to-rail signal conditioning in space- and energy-constrained portable systems - emphasizing ultra-low supply current, wide supply range, and robust input/output behavior across temperature.
FAQ
What is the maximum capacitive load the MAX4042ESA+T can drive without oscillation?
The MAX4042ESA+T is unity-gain stable with capacitive loads up to 200pF when driving a resistive load ≥100kΩ. For larger capacitive loads (e.g., ADC input capacitance + PCB trace), an isolation resistor (typically 100Ω–1kΩ) between output and load restores stability, though it introduces minor gain error due to voltage division.
Does the MAX4042ESA+T have a shutdown feature?
No, the MAX4042ESA+T does not include a shutdown pin. Shutdown functionality is only available on the MAX4041 and MAX4043 variants. The MAX4042ESA+T operates continuously when powered; power cycling is required to reduce current draw below its nominal 20µA (dual-channel) quiescent level.
Can the MAX4042ESA+T be used as a comparator?
Yes, the MAX4042ESA+T can function as a rail-to-rail input/output comparator. Propagation delay is ~20µs with 100mV overdrive at +5V supply. However, output saturation increases quiescent current to ~28–35µA, and external hysteresis (e.g., positive feedback network) is recommended to prevent oscillation near threshold.
What is the input bias current behavior across common-mode voltage for the MAX4042ESA+T?
The MAX4042ESA+T uses complementary NPN/PNP input pairs, causing input bias current to change polarity near VCC/2. At VCM = 0V or VCC, IB is ±2nA typ; near mid-supply, it crosses zero. To minimize offset, match source impedances at IN+ and IN– terminals - especially critical in high-impedance sensor interfaces.
Is the MAX4042ESA+T pin-compatible with other devices in the MAX4040–MAX4044 family?
The MAX4042ESA+T shares the same 8-pin SO package and pinout as the MAX4041ESA and MAX4044ESD, but differs functionally: MAX4041 is single-channel, MAX4044 is quad-channel. Pin compatibility enables drop-in replacement only for dual-channel variants (e.g., MAX4042EUA in µMAX); SO-package variants maintain identical pin assignments across the family.
MAX4042ESA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 200 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:
- 8-SOIC
MAX4042ESA+T FAQ
1.How can I place an order for MAX4042ESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4042ESA+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 MAX4042ESA+T reliable?
The price and inventory of MAX4042ESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4042ESA+T is usually 5 days.
3.What payment methods are accepted for MAX4042ESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4042ESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4042ESA+T?
MAX4042ESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4042ESA+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 MAX4042ESA+T?
For technical support, including MAX4042ESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4042ESA+T requirements.
6.How does Aetrix verify that MAX4042ESA+T is sourced from the original manufacturer or authorized distributors?
All MAX4042ESA+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 MAX4042ESA+T meets industry standards.
7.What is the process for return or replacement of MAX4042ESA+T?
All MAX4042ESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4042ESA+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 MAX4042ESA+T part is unused and in its original packaging.
Return procedure for MAX4042ESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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