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Analog Devices Inc./Maxim Integrated MAX4040ESA+
- Part No.:
- MAX4040ESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4040ESA+.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:285
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Product details
Overview
The MAX4040ESA+ from Maxim Integrated is a single-channel, micropower, rail-to-rail input/output operational amplifier optimized for ultra-low-power, low-voltage portable systems. It operates from +2.4V to +5.5V single supply, draws only 10µA quiescent current, delivers 90kHz gain-bandwidth, and swings within 10mV of rails with 100kΩ load - enabling precision signal conditioning in battery-powered sensor interfaces and portable instrumentation.
For engineers reviewing the MAX4040ESA+ datasheet, MAX4040ESA+ pinout, MAX4040ESA+ application, or MAX4040ESA+ equivalent, key selection criteria include its guaranteed -40°C to +85°C operation, 200µV input offset voltage, rail-to-rail I/O capability at sub-3V supply, and SOT23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX4040ESA+ employs a dual-input-stage architecture (NPN/PNP differential pairs) to achieve true rail-to-rail common-mode input range extending from VEE to VCC. Its output stage uses complementary push-pull circuitry capable of sourcing/sinking current to drive loads down to 25kΩ while maintaining rail-to-rail swing.
It features no phase reversal under overdriven inputs, unity-gain stability with up to 200pF capacitive loads, and high open-loop gain (>94dB) combined with low input bias current (±2nA typ) - making it suitable for high-impedance sensor amplification without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.4V to +5.5V single supply - enables direct operation from coin-cell or Li-ion battery stacks without regulation. |
| Quiescent Current | 10µA per amplifier - extends battery life in always-on monitoring applications beyond 10 years on CR2032. |
| Gain-Bandwidth Product | 90kHz - supports DC-coupled sensor signal conditioning up to ~10kHz with stable unity-gain configuration. |
| Input Offset Voltage | ±200µV max - ensures <0.5% error in 100mV full-scale strain gauge or thermistor amplification. |
| Rail-to-Rail Output Swing | Within 10mV of rails (100kΩ load) - maximizes dynamic range in 3.3V or lower ADC reference systems. |
| Input Common-Mode Range | VEE to VCC - allows direct interfacing with ground-referenced sensors without level-shifting circuitry. |
| Open-Loop Gain | 94dB min - provides >10,000 V/V loop gain for precision closed-loop configurations. |
Pinout & Package
The MAX4040ESA+ is housed in a 5-pin SOT23-5 surface-mount package with exposed pad (ES suffix), footprint-compatible with industry-standard SOT23 layouts and reflow-solderable per JEDEC J-STD-020.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VEE | Negative supply terminal - tied to GND in single-supply operation; defines lower rail for input/output swing. |
| 2 | IN− | Inverting input - accepts feedback network connection; high-impedance node (45MΩ differential) for precision gain setting. |
| 3 | OUT | Amplifier output - enters high-impedance state only in shutdown variants (not applicable to MAX4040); drives resistive/capacitive loads directly. |
| 4 | IN+ | Noninverting input - connects to sensor or reference signal; rail-to-rail common-mode range eliminates need for biasing resistors. |
| 5 | VCC | Positive supply terminal - supplies power and sets upper rail; PSRR of 85dB rejects battery voltage decay during discharge. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal on overdrive | Prevents latch-up or erroneous output states when input exceeds supply rails - critical for comparator-mode use in fault detection. |
| Rail-to-rail I/O at 2.4V | Full signal swing preserved even at minimum supply - avoids headroom loss in energy-harvesting or low-VDD IoT nodes. |
| 200pF capacitive-load stability | Eliminates need for isolation resistors in PCB trace or cable-driven applications - simplifies layout and reduces component count. |
| 70nV/√Hz input voltage noise | Enables clean amplification of µV-level signals from piezoresistive or thermopile sensors without additional filtering. |
| 2µV/°C input offset drift | Ensures <1mV total offset shift across -40°C to +85°C - suitable for uncalibrated industrial temperature sensing. |
Applications
| Battery-Powered Sensor Amplifier | Strain Gauge Interface |
|---|---|
Use Scenario: Signal conditioning for MEMS pressure sensor powered by CR2032 coin cell in wireless environmental monitor. IC Role / Device Role / Timing Role: Single-supply op amp configured as noninverting amplifier with gain = 100, referenced to VEE = GND. Use Value: 10µA supply current enables >10-year battery life; rail-to-rail output fully utilizes 3.0V ADC reference without clipping. | Use Scenario: Wheatstone bridge output amplification in digital scale load cell with 2.5V excitation. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with matched input impedance and low offset drift. Use Value: ±200µV offset and 2µV/°C drift limit measurement error to <0.1% FS across operating temperature range. |
| Portable Medical Pulse Oximeter | Notebook Computer Battery Monitor |
Use Scenario: Amplifying weak photodiode current from red/IR LEDs in wearable pulse oximetry module. IC Role / Device Role / Timing Role: Transimpedance amplifier with 1MΩ feedback resistor, operating from 3.3V system rail. Use Value: 70nV/√Hz input noise preserves SNR for sub-1% SpO₂ resolution; unity-gain stability with photodiode capacitance avoids oscillation. | Use Scenario: Current-sense amplifier monitoring charge/discharge current in lithium-polymer battery management subsystem. IC Role / Device Role / Timing Role: High-side current monitor using MAX4040ESA+ in difference amplifier configuration with precision shunt. Use Value: Rail-to-rail input allows direct sensing at battery voltage up to 4.4V; 94dB CMRR rejects common-mode noise from switching regulators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV8511IDBVR | Lower 5.5µA supply current but 50kHz GBW; 3.5mV max offset; SOT23-5 package. | Less suitable for higher-frequency sensor signals (>5kHz); better for ultra-long-life static sensing. | Select TLV8511IDBVR when >15-year battery life is prioritized over bandwidth or offset precision. |
| LPV821DBVR | 650nA supply current, 10kHz GBW, 125µV max offset, same SOT23-5 footprint. | Optimized for nanoamp-level current sensing; insufficient bandwidth for audio or fast transients. | Choose LPV821DBVR only for sub-1kHz, ultra-low-power applications where 90kHz GBW is unnecessary. |
Compared with TLV8511IDBVR and LPV821DBVR, the MAX4040ESA+ uniquely balances 90kHz bandwidth, 10µA consumption, and ±200µV offset in SOT23-5 - making it the only option supporting precision, battery-operated signal chains requiring both speed and efficiency.
Availability
The MAX4040ESA+ is available at Aetrix Electronics and suitable for battery-powered sensor amplifiers, portable medical devices, notebook computer power monitoring, and industrial handheld instrumentation requiring stable component supply across extended temperature ranges.
Supply support for MAX4040ESA+ 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 MAX4040ESA+ belongs to the MAX4040–MAX4044 micropower op amp family, engineered specifically for rail-to-rail performance at sub-3V supplies in space-constrained, battery-operated systems.
FAQ
What is the maximum capacitive load the MAX4040ESA+ can drive without oscillation?
According to the datasheet, the MAX4040ESA+ is unity-gain stable with capacitive loads up to 200pF. This specification is verified under standard test conditions (VCC = +5.0V, RL = 100kΩ). For loads exceeding 200pF, an isolation resistor (e.g., 1kΩ) between the MAX4040ESA+ output and the capacitive load restores stability, though at the cost of gain accuracy due to voltage division.
Does the MAX4040ESA+ have a shutdown pin?
No, the MAX4040ESA+ does not include a shutdown pin. Shutdown functionality is only available on the MAX4041 and MAX4043 variants in the same family. The MAX4040ESA+ operates continuously when powered and has no internal mechanism to reduce supply current below its nominal 10µA quiescent level.
What is the input common-mode voltage range of the MAX4040ESA+?
The MAX4040ESA+ features a rail-to-rail input common-mode voltage range from VEE to VCC. This means it accepts input signals equal to or slightly beyond either supply rail - confirmed across the full -40°C to +85°C temperature range and all specified supply voltages (+2.4V to +5.5V).
Can the MAX4040ESA+ be used as a comparator?
Yes, the MAX4040ESA+ can be used as a rail-to-rail input/output comparator. Its propagation delay is characterized vs. input overdrive (Figure 7), and it exhibits no phase reversal. However, quiescent current rises to ~28–35µA when the output saturates near the rails - a known behavior documented in the Applications Information section.
What is the output voltage swing specification for the MAX4040ESA+ with a 100kΩ load?
With a 100kΩ load tied to VCC/2, the MAX4040ESA+ output typically swings to within 10mV of both rails (VEE and VCC) at room temperature. This rail-to-rail performance is guaranteed over the full -40°C to +85°C operating range and across the entire +2.4V to +5.5V supply range, as confirmed in the Electrical Characteristics table.
MAX4040ESA+ 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:
- General Purpose
- Number of Circuits:
- 1
- 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
- Current - Output / Channel:
- -
- 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
MAX4040ESA+ FAQ
1.How can I place an order for MAX4040ESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4040ESA+ 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 MAX4040ESA+ reliable?
The price and inventory of MAX4040ESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4040ESA+ is usually 5 days.
3.What payment methods are accepted for MAX4040ESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4040ESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4040ESA+?
MAX4040ESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4040ESA+ 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 MAX4040ESA+?
For technical support, including MAX4040ESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4040ESA+ requirements.
6.How does Aetrix verify that MAX4040ESA+ is sourced from the original manufacturer or authorized distributors?
All MAX4040ESA+ 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 MAX4040ESA+ meets industry standards.
7.What is the process for return or replacement of MAX4040ESA+?
All MAX4040ESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4040ESA+, 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 MAX4040ESA+ part is unused and in its original packaging.
Return procedure for MAX4040ESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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