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Analog Devices Inc./Maxim Integrated MAX4400ASA
- Part No.:
- MAX4400ASA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4400ASA.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,175
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Product details
Overview
The MAX4400ASA from Maxim Integrated is a single-channel, rail-to-rail output operational amplifier designed for low-power, single-supply systems. It operates from +2.5V to +5.5V, draws only 320µA quiescent current, delivers ±1.4mA output drive, and features unity-gain stability with up to 400pF capacitive load-making it ideal for sensor signal conditioning in automotive and portable instrumentation.
For engineers reviewing the MAX4400ASA datasheet, MAX4400ASA pinout, MAX4400ASA application, or MAX4400ASA equivalent, key selection criteria include its 1MHz gain-bandwidth product, ±0.8mV input offset voltage (typ), 110dB open-loop gain at 2kΩ load, rail-to-rail output swing within 55mV of rails, and operation across –40°C to +125°C.
Technical Context
The MAX4400ASA uses a ground-sensing input stage and rail-to-rail CMOS output stage optimized for single-supply operation. Its input common-mode range extends from VSS to VDD – 1.4V, enabling direct sensing of signals near ground-a critical capability for zero-crossing detectors and sensor front-ends.
It achieves unity-gain stability without external compensation while driving up to 400pF, verified by phase margin ≥70° and gain margin ≥20dB at no load and under capacitive loading. The device lacks shutdown functionality-exclusive to the 6-pin MAX4401 variant-and is specified fully over the automotive temperature range (–40°C to +125°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +5.5V - supports direct integration into 3.3V and 5V embedded systems without level-shifting. |
| Quiescent Current | 320µA per amplifier - enables multi-year battery life in always-on sensor nodes and portable instruments. |
| Gain-Bandwidth Product | 1MHz - sufficient for anti-aliasing, active filtering, and DC-coupled signal amplification up to ~100kHz. |
| Input Offset Voltage | ±0.8mV (typ) - ensures <100µV error in 100mV full-scale sensor outputs without trimming. |
| Rail-to-Rail Output Swing | Within 55mV of VDD/VSS at 2kΩ load - maximizes dynamic range in single-supply data acquisition. |
| Capacitive Load Stability | Stable up to 400pF - eliminates need for isolation resistors when driving ADC inputs or long PCB traces. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, industrial control, and harsh-environment monitoring. |
Pinout & Package
The MAX4400ASA is housed in an 8-pin SO (Small Outline) package with standard 1.27mm pitch, compatible with automated SMT assembly and IPC-7351B land patterns (outline S8+2, land pattern 90-0096).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN+ | Noninverting input - accepts ground-referenced sensor signals; common-mode range includes VSS. |
| 2 | IN− | Inverting input - used for feedback configuration; matched input bias current minimizes offset drift. |
| 3 | OUT | Amplifier output - rail-to-rail CMOS stage drives 2kΩ loads with <55mV headroom to supply rails. |
| 4 | VSS | Negative supply terminal - connect directly to system ground in single-supply applications. |
| 5 | VDD | Positive supply terminal - bypass with 0.1µF ceramic capacitor to ground for noise immunity. |
| 6–8 | No Connect | Unused pins - left unconnected per datasheet; no internal connection or function. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output stage | Swings within 55mV of VDD/VSS at 2kΩ load - preserves >95% of available voltage range for precision analog interfaces. |
| Ground-sensing input | Input common-mode range from VSS to VDD – 1.4V - enables direct measurement of 0V-referenced thermocouples or bridge sensors. |
| Unity-gain stable with CLOAD ≤ 400pF | No external compensation required when driving ADCs, cables, or PCB parasitics - reduces BOM count and layout risk. |
| Low THD (0.015%) | At 10kHz, 2Vp-p, 2kΩ load - maintains signal fidelity in audio preamps and infrared receiver baseband stages. |
| High AVOL (110dB) | At 2kΩ load - ensures <0.001% gain error in closed-loop configurations with gains ≥100. |
Applications
| Single-Supply Zero-Crossing Detector | Sensor Signal Detection |
|---|---|
Use Scenario: Detecting polarity reversal of AC-coupled transducer outputs (e.g., vibration sensors, microphones) in battery-powered condition monitoring units. IC Role / Device Role / Timing Role: Comparator-like threshold detection using internal hysteresis via feedback; configured as high-gain inverting amplifier with reference at VDD/2. Use Value: Rail-to-rail output swing ensures clean logic-level transitions to MCU GPIOs; 320µA quiescent current extends runtime in wake-on-event designs. |
Use Scenario: Amplifying low-level mV-range outputs from RTDs, thermistors, or strain gauges in automotive cabin temperature modules. IC Role / Device Role / Timing Role: Precision DC-coupled noninverting amplifier with gain set by external resistors; ground-sensing input accepts sensor bridges referenced to chassis ground. Use Value: ±0.8mV input offset and 110dB open-loop gain minimize calibration drift; –40°C to +125°C rating matches vehicle thermal envelope. |
| Electronic Ignition Module | Infrared Receiver Front-End |
Use Scenario: Conditioning coil current sense signals in 12V automotive ignition control units where space and thermal constraints limit active components. IC Role / Device Role / Timing Role: High-speed current-to-voltage converter feeding peak-detect circuitry; operates from switched 5V rail with minimal self-heating. Use Value: 1MHz GBW supports accurate pulse edge timing; 8-pin SO package fits dense engine control board layouts; 125°C rating survives under-hood placement. |
Use Scenario: Amplifying weak 38kHz modulated IR photodiode currents in remote-control receivers for smart home devices. IC Role / Device Role / Timing Role: Transimpedance amplifier with AC-coupled output; low input bias current (±0.1pA typ) prevents photodiode leakage from degrading SNR. Use Value: 0.015% THD preserves modulation integrity; rail-to-rail output drives subsequent comparator cleanly; 320µA draw suits always-on standby mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-channel, rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2461CDR | Higher quiescent current (600µA), lower GBW (6.4MHz), no guaranteed 125°C operation. | Better for higher-speed signal chains but unsuitable for extended-temperature automotive use. | Select TLV2461CDR only if speed >1MHz is required and temperature range is limited to –40°C to +85°C. |
| MCP6001T-E/OT | Lower quiescent current (100µA), lower GBW (1MHz), rated only to +125°C in select packages (not SO-8). | Optimized for ultra-low-power battery applications but lacks AEC-Q200 qualification path and SO-8 automotive footprint. | Choose MCP6001T-E/OT for cost-sensitive consumer devices; avoid for automotive-grade SO-8 drop-in replacement needs. |
Compared with TLV2461CDR and MCP6001T-E/OT, the MAX4400ASA uniquely combines guaranteed 125°C operation in an industry-standard SO-8 package, rail-to-rail output with 55mV rail margin, and 320µA quiescent current-making it the only option qualified for space-constrained, high-temperature automotive signal conditioning without performance trade-offs.
Availability
MAX4400ASA is available at Aetrix Electronics and suitable for automotive sensor interfaces, portable instrumentation, and industrial condition monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX4400ASA 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for demanding environments.
The MAX4400–MAX4403 family was engineered specifically for cost-sensitive, low-power, single-supply applications in automotive, industrial, and portable electronics-emphasizing rail-to-rail operation, wide temperature range, and robust capacitive-load drive.
FAQ
What is the maximum capacitive load the MAX4400ASA can drive while remaining stable?
The MAX4400ASA is unity-gain stable with capacitive loads up to 400pF, as confirmed by phase margin ≥70° and gain margin ≥20dB in the datasheet's Typical Operating Characteristics. This allows direct connection to ADC inputs, long traces, or filtering capacitors without external isolation resistors-reducing component count and layout complexity in the MAX4400ASA-based design.
Does the MAX4400ASA include a shutdown feature?
No, the MAX4400ASA does not include a shutdown feature. Shutdown functionality is exclusive to the MAX4401 variant (6-pin SC70), which adds SHDN pin and reduces supply current to 1µA max in disabled state. The MAX4400ASA is a fixed-function single op amp with no enable/disable control-its 320µA quiescent current remains constant during operation.
What is the input common-mode voltage range of the MAX4400ASA?
The MAX4400ASA features ground-sensing inputs with a common-mode range from VSS to VDD – 1.4V. At VDD = 5V, this spans 0V to 3.6V-enabling direct interface with sensors referenced to system ground, such as thermocouples, bridge circuits, or current-sense shunts. This specification is guaranteed over the full –40°C to +125°C operating range of the MAX4400ASA.
Can the MAX4400ASA operate from a 3.3V supply?
Yes, the MAX4400ASA is fully specified to operate from +2.5V to +5.5V, including standard 3.3V logic supplies. At 3.3V, it maintains rail-to-rail output swing (within ~45mV of rails at 2kΩ), 320µA quiescent current, and 1MHz gain-bandwidth-making it suitable for 3.3V microcontroller-based sensor nodes and IoT edge devices where the MAX4400ASA provides precision analog signal conditioning without level translation.
Is the MAX4400ASA pin-compatible with other op amps in the SO-8 package?
No, the MAX4400ASA is not pin-compatible with generic SO-8 op amps. Its pinout (IN+, IN−, OUT, VSS, VDD, NC, NC, NC) deviates from industry-standard dual-op-amp SO-8 layouts. The two unused pins (6–8) are intentionally unconnected-no internal circuitry ties to them. Substitution requires schematic and layout revision; the MAX4400ASA must be treated as a dedicated single-amplifier SO-8 solution.
MAX4400ASA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 1V/µs
- Gain Bandwidth Product:
- 800 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.1 pA
- Voltage - Input Offset:
- 800 µV
- Current - Supply:
- 410µA
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX4400ASA FAQ
1.How can I place an order for MAX4400ASA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4400ASA 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 MAX4400ASA reliable?
The price and inventory of MAX4400ASA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4400ASA is usually 5 days.
3.What payment methods are accepted for MAX4400ASA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4400ASA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4400ASA?
MAX4400ASA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4400ASA 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 MAX4400ASA?
For technical support, including MAX4400ASA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4400ASA requirements.
6.How does Aetrix verify that MAX4400ASA is sourced from the original manufacturer or authorized distributors?
All MAX4400ASA 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 MAX4400ASA meets industry standards.
7.What is the process for return or replacement of MAX4400ASA?
All MAX4400ASA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4400ASA, 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 MAX4400ASA part is unused and in its original packaging.
Return procedure for MAX4400ASA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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