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Analog Devices Inc./Maxim Integrated MAX4036AAXK+T
- Part No.:
- MAX4036AAXK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX4036AAXK+T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,841
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Product details
Overview
MAX4036AAXK+T from Maxim Integrated is a single-channel, rail-to-rail output operational amplifier with ultra-low 800nA supply current, 1.4V minimum operating voltage, and −40°C to +125°C temperature range. It features 200µV typical input offset voltage, 1.0pA typical input bias current, and rail-to-rail output swing within 25mV of rails into 5kΩ - optimized for single-cell Li⁺ or two-cell alkaline/NiMH battery-powered precision sensing.
For engineers reviewing the MAX4036AAXK+T datasheet, MAX4036AAXK+T pinout, MAX4036AAXK+T application, or MAX4036AAXK+T equivalent, this page delivers verified specifications, package-validated pin functions, real-world use cases in potentiostats and remote sensors, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The MAX4036AAXK+T implements a BiCMOS input stage enabling 1.0pA typical input bias current and 200µV input offset voltage, with rail-to-rail CMOS output capable of sourcing/sinking ±13mA while maintaining 25mV rail proximity into 5kΩ loads. Its input common-mode range extends from VSS to VDD − 0.4V at 1.4V supply, supporting true ground-sensing in low-voltage systems.
It operates without external reference bypassing and exhibits no phase reversal on overdriven inputs - critical for robust operation in high-impedance sensor front-ends. Power-on settling time is 0.25ms, and unity-gain stability is guaranteed up to 5000pF capacitive load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.4V to 3.6V - enables direct operation from single Li⁺ cell (2.7–4.2V) or two alkaline/NiMH cells (2.0–3.2V) without regulation. |
| Supply Current per Amplifier | 800nA typ at +25°C - reduces battery drain to <1µA per channel, extending shelf life in always-on sensor nodes. |
| Input Bias Current | ±1.0pA typ - preserves signal integrity in >1GΩ source impedances (e.g., pH electrodes, electrometers). |
| Input Offset Voltage | ±200µV typ - supports sub-mV DC accuracy in thermistor or RTD signal conditioning without trimming. |
| Rail-to-Rail Output Swing | Within 25mV of VSS/VDD into 5kΩ - maximizes dynamic range for ADCs with 0–VDD input spans. |
| Gain-Bandwidth Product | 4kHz - sufficient for DC-coupled sensor amplification and slow control loops (e.g., thermostat feedback). |
| Operating Temperature Range | −40°C to +125°C - qualified for under-hood automotive, industrial monitoring, and extended-range medical devices. |
Pinout & Package
MAX4036AAXK+T is housed in a 5-pin SC70 package (JEDEC MO-229/WEED-3), footprint-compatible with SOT-23 but 30% smaller (2.9mm × 1.6mm × 0.8mm). The exposed pad is not present in SC70; thermal dissipation relies on PCB copper area under the body.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN+ | Noninverting input - high-impedance node for sensor voltage or reference connection; accepts 0V to VDD − 0.4V common-mode range. |
| 2 | VSS | Negative supply - must be connected to system ground; serves as return path for reference (if used) and output current. |
| 3 | IN− | Inverting input - forms differential pair with IN+; supports feedback networks for gain-setting or comparator hysteresis. |
| 4 | OUT | Amplifier output - rail-to-rail CMOS driver capable of ±13mA short-circuit current; stable into 5000pF. |
| 5 | VDD | Positive supply - accepts 1.4V–3.6V; requires 0.1µF ceramic bypass capacitor to VSS for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 800nA supply current | Enables >10-year battery life in coin-cell-powered IoT sensors with 10µA average system current. |
| No external reference bypass required | Eliminates board space and cost of reference decoupling capacitor - simplifies layout in space-constrained wearables. |
| No phase reversal on overdriven inputs | Prevents latch-up or false triggering when input exceeds supply rails - essential for fault-tolerant medical sensor interfaces. |
| Rail-to-rail output into 5kΩ | Delivers full-scale ADC input range without level-shifting circuitry, reducing component count in data acquisition modules. |
| −40°C to +125°C operation | Validated performance across automotive under-hood, industrial process control, and aerospace environmental extremes. |
Applications
| Electrometer Amplifier | Potentiostat for pH/ISE Sensors |
|---|---|
Use Scenario: High-impedance current-to-voltage conversion in lab-grade pH meters or ion-selective electrode (ISE) analyzers. IC Role / Device Role / Timing Role: Transimpedance amplifier with pA-level input bias current and sub-mV offset to resolve femtoampere currents. Use Value: Enables direct measurement of electrode currents down to 1pA without guard rings or active shielding, reducing BOM cost by 30% vs. discrete solutions. | Use Scenario: Three-electrode electrochemical cell control in portable blood glucose monitors or corrosion sensors. IC Role / Device Role / Timing Role: Precision op amp implementing constant-voltage potentiostat loop with buffered reference input. Use Value: Maintains <±1mV potential accuracy across battery discharge (1.4–3.6V), eliminating need for LDO in handheld diagnostic tools. |
| Remote Sensor Node Front-End | Micropower Thermostat |
Use Scenario: Battery-powered soil moisture or gas sensor node transmitting data via LoRaWAN every 15 minutes. IC Role / Device Role / Timing Role: Low-noise signal conditioner for resistive/capacitive transducers, powering up only during measurement bursts. Use Value: 0.25ms power-on settling allows full 16-bit ADC conversion within 1ms wake-up window, minimizing active time and extending 10-year battery life. | Use Scenario: HVAC wall thermostat using NTC thermistor and microcontroller with integrated 12-bit ADC. IC Role / Device Role / Timing Role: Precision buffer between thermistor divider and ADC input, rejecting supply ripple during battery voltage decay. Use Value: 82dB PSRR ensures <0.1°C measurement error over 1.4–3.6V supply range, eliminating calibration drift in unregulated battery systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar micropower op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4036EXK-T | Same architecture and SC70-5 package, but rated for −40°C to +85°C only; supply current 1.7µA max at +85°C vs. 2.1µA for MAX4036AAXK+T at +125°C. | Not suitable for under-hood automotive or industrial enclosures exceeding +85°C ambient. | Select MAX4036EXK-T only if full −40°C to +125°C qualification is unnecessary and cost is primary constraint. |
| LTC1540CS5#TRMPBF | Single micropower op amp with 1µA supply current, 1.8V min supply, and 1.5mV max VOS - lacks rail-to-rail output (swing limited to VDD − 0.3V) and has higher input bias current (10pA). | Cannot drive ADCs requiring true 0–VDD input range; less suitable for pH electrodes requiring pA-level bias. | Choose LTC1540CS5#TRMPBF only when rail-to-rail output is not required and 10pA input bias is acceptable for <100MΩ source impedances. |
Compared with MAX4036EXK-T, the MAX4036AAXK+T provides guaranteed operation up to +125°C with tighter supply current specs across temperature, while LTC1540CS5#TRMPBF trades rail-to-rail output and ultra-low bias for slightly lower cost and broader vendor availability - making it viable only in non-critical, room-temperature applications.
Availability
MAX4036AAXK+T is available at Aetrix Electronics and suitable for battery-powered medical instrumentation, remote environmental sensors, and industrial potentiostat systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX4036AAXK+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, automotive, and medical applications.
The MAX4036–MAX4039 family was engineered specifically for ultra-low-power, high-impedance sensor signal conditioning - delivering pA-level input bias, rail-to-rail operation from 1.4V, and extended temperature reliability in miniature packages.
FAQ
What is the maximum supply voltage for MAX4036AAXK+T?
The MAX4036AAXK+T supports a maximum supply voltage of +3.6V, with absolute maximum rating of +4.0V. Operation above 3.6V risks parametric degradation and is not guaranteed. The device is optimized for 1.4V to 3.6V single-supply operation, making it ideal for direct battery connection without regulation - especially in single-cell Li⁺ or dual alkaline/NiMH systems where voltage ranges from 1.4V (deep discharge) to 3.6V (fresh condition). MAX4036AAXK+T maintains specified performance across this full range.
Does MAX4036AAXK+T include an internal voltage reference?
No, the MAX4036AAXK+T does not include an internal voltage reference. It belongs to the MAX4036/MAX4038 variant group, which omits the 1.232V buffered reference found in MAX4037/MAX4039. The MAX4036AAXK+T is a single op amp only - all five pins are dedicated to power (VDD, VSS), inputs (IN+, IN−), and output (OUT). Reference functionality requires selecting MAX4037A or MAX4039 variants instead. MAX4036AAXK+T remains fully compatible with external references or ratiometric ADC architectures.
Can MAX4036AAXK+T drive a 10nF capacitive load stably?
Yes, the MAX4036AAXK+T is unity-gain stable into capacitive loads up to 5000pF (5nF) without external compensation. This is explicitly guaranteed in the datasheet and validated across temperature and supply voltage. For loads beyond 5nF, an isolation resistor (RISO) between the output and load is recommended to maintain phase margin - though such configurations reduce effective gain and output swing due to voltage division. MAX4036AAXK+T's ability to drive 10nF directly eliminates need for external RC networks in many sensor filter or cable-drive applications.
What is the input common-mode voltage range of MAX4036AAXK+T at 1.4V supply?
At VDD = 1.4V, the MAX4036AAXK+T guarantees an input common-mode voltage range from VSS (0V) to VDD − 0.4V (1.0V), per the datasheet's "Guaranteed by CMRR test" specification. This allows true ground-sensing capability - critical for interfacing with 0V-referenced transducers like thermocouples or bridge sensors. Performance degrades outside this range, and full rail-to-rail input is not supported. The range expands to VSS to VDD − 0.2V at 3.3V supply. MAX4036AAXK+T maintains 44dB minimum CMRR across its specified common-mode range at 1.4V.
Is MAX4036AAXK+T pin-compatible with other MAX4036 variants?
Yes, MAX4036AAXK+T is pin-compatible with all SC70-5 packaged MAX4036 variants including MAX4036EXK-T and MAX4036EUK+T. All share identical 5-pin SC70 pinout: Pin 1 = IN+, Pin 2 = VSS, Pin 3 = IN−, Pin 4 = OUT, Pin 5 = VDD. The 'A' suffix denotes −40°C to +125°C temperature grade, while 'E' denotes −40°C to +85°C - both use identical silicon and package. No PCB redesign is needed when upgrading from MAX4036EXK-T to MAX4036AAXK+T; only qualification testing for high-temperature operation is required. MAX4036AAXK+T retains same top mark (ASN) and footprint.
MAX4036AAXK+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.004V/µs
- Gain Bandwidth Product:
- 4 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 900nA
- Current - Output / Channel:
- 13 mA
- Voltage - Supply Span (Min):
- 1.4 V
- Voltage - Supply Span (Max):
- 3.6 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
MAX4036AAXK+T FAQ
1.How can I place an order for MAX4036AAXK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4036AAXK+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 MAX4036AAXK+T reliable?
The price and inventory of MAX4036AAXK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4036AAXK+T is usually 5 days.
3.What payment methods are accepted for MAX4036AAXK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4036AAXK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4036AAXK+T?
MAX4036AAXK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4036AAXK+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 MAX4036AAXK+T?
For technical support, including MAX4036AAXK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4036AAXK+T requirements.
6.How does Aetrix verify that MAX4036AAXK+T is sourced from the original manufacturer or authorized distributors?
All MAX4036AAXK+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 MAX4036AAXK+T meets industry standards.
7.What is the process for return or replacement of MAX4036AAXK+T?
All MAX4036AAXK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4036AAXK+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 MAX4036AAXK+T part is unused and in its original packaging.
Return procedure for MAX4036AAXK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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