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Analog Devices Inc./Maxim Integrated MAX4478AUD/V+
- Part No.:
- MAX4478AUD/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MAX4478AUD/V+.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,658
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Product details
Overview
MAX4478AUD/V+ from Maxim Integrated is a quad, unity-gain stable, rail-to-rail output operational amplifier optimized for low-noise, low-distortion signal conditioning in precision analog systems. It delivers 10MHz gain-bandwidth, 4.5nV/√Hz input voltage-noise density, 0.0002% THD+N at 1kHz (1kΩ load), and operates from +2.7V to +5.5V single supply - ideal for 16-bit ADC buffers and medical sensor front-ends.
For engineers reviewing the MAX4478AUD/V+ datasheet, MAX4478AUD/V+ pinout, MAX4478AUD/V+ application, or MAX4478AUD/V+ equivalent, this page provides verified circuit role, package mapping (14-pin TSSOP), thermal performance (θJA = 100.4°C/W multilayer), shutdown capability absence, and AEC-Q100 automotive qualification context.
Technical Context
The MAX4478AUD/V+ is a quad-channel op amp with unity-gain stability and 10MHz GBW, designed for high-fidelity signal amplification where DC accuracy and wide dynamic range are critical. Its input common-mode range extends 0.1V below VSS and to VDD − 1.7V, enabling ground-sensing operation in single-supply configurations.
It features rail-to-rail output swing (within 80mV of rails into 1kΩ), low quiescent current (2.5mA per amplifier at VDD = 5V), and guaranteed phase reversal immunity under overdrive. No shutdown function is present - SHDN pin is unassigned per pin configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 10MHz - supports stable closed-loop gain ≥ 1V/V up to 10MHz, suitable for anti-aliasing filters and DAC output stages. |
| Input Voltage-Noise Density | 4.5nV/√Hz at 1kHz - enables high-resolution measurement of microvolt-level signals without degrading SNR. |
| Total Harmonic Distortion + Noise | 0.0002% THD+N at 1kHz, RL = 1kΩ - preserves signal fidelity in audio and instrumentation-grade applications. |
| Supply Voltage Range | +2.7V to +5.5V single supply - compatible with Li-ion, 3.3V, and 5V system rails without level-shifting. |
| Input Offset Voltage | ±70µV (typ), ±750µV (max over temp) - ensures < 0.01% gain error in precision gain stages and bridge sensor interfaces. |
| Rail-to-Rail Output Swing | Within 80mV of VDD/VSS into 1kΩ - maximizes dynamic range in low-voltage data acquisition systems. |
| Operating Temperature | −40°C to +125°C - validated for under-hood automotive and industrial control environments. |
Pinout & Package
MAX4478AUD/V+ is housed in a 14-pin TSSOP package (package code U14+2), RoHS-compliant, with exposed thermal pad not present in this variant. Thermal resistance is θJA = 100.4°C/W on multilayer PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8, 14 | OUTA, OUTB, OUTC, OUTD | Four independent rail-to-rail output terminals - each drives loads ≥ 1kΩ while maintaining DC accuracy and low distortion. |
| 2, 6, 9, 13 | IN−, IN−, IN−, IN− | Inverting inputs for all four amplifiers - support differential, inverting, and transimpedance configurations. |
| 3, 5, 10, 12 | IN+, IN+, IN+, IN+ | Noninverting inputs - accept common-mode voltages from −0.1V to VDD − 1.7V, enabling true ground-referenced sensing. |
| 4 | VSS | Negative supply terminal - connect directly to system ground in single-supply operation. |
| 11 | VDD | Positive supply terminal - accepts 2.7V–5.5V; requires local 0.1µF ceramic bypass capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Automotive-grade reliability certified for temperature grade 1 (−40°C to +125°C) per ordering suffix /V. |
| Quad Channel Integration | Four matched amplifiers in one 14-pin TSSOP - reduces board space and inter-channel mismatch vs. discrete solutions. |
| Ground-Sensing Input | Input common-mode range includes VSS − 0.1V - allows direct interfacing with sensors referenced to system ground. |
| Capacitive-Load Stability | Stable driving up to 200pF - eliminates need for isolation resistors when buffering ADC inputs or long traces. |
| Low Input Bias Current | 1pA (typ), ≤150pA (max) - prevents voltage errors in high-impedance pH, piezoelectric, or strain gauge circuits. |
Applications
| ADC Buffers | DAC Output Amplifiers |
|---|---|
Use Scenario: Buffering the unbuffered voltage output of a 16-bit DAC (e.g., MAX5541) before routing to downstream circuitry. IC Role / Device Role / Timing Role: Precision voltage follower with ultra-low IB (150pA max) to preserve 16-bit linearity and minimize offset drift. Use Value: Eliminates DAC output loading error and maintains full-scale accuracy across temperature (±750µV VOS max). | Use Scenario: Driving high-impedance analog inputs of precision ADCs (e.g., MAX11200) in data loggers. IC Role / Device Role / Timing Role: Low-noise, low-distortion gain stage that conditions sensor signals prior to digitization. Use Value: 4.5nV/√Hz noise and 0.0002% THD+N ensure >95dB SNR and <−105dBc harmonic content in 16-bit+ systems. |
| Strain Gauges/Sensor Amplifiers | Medical Instrumentation |
Use Scenario: Amplifying mV-level Wheatstone bridge outputs from load cells or pressure transducers. IC Role / Device Role / Timing Role: Instrumentation-grade differential amplifier with rail-to-rail output and ground-sensing inputs. Use Value: Input offset drift <6µV/°C and CMRR >90dB maintain µV-level resolution despite thermal gradients. | Use Scenario: Front-end amplification in portable ECG or EEG monitors requiring low power and high signal integrity. IC Role / Device Role / Timing Role: Low-noise, low-power biopotential amplifier with AEC-Q100 qualification for safety-critical use. Use Value: −40°C to +125°C operation and 125dB large-signal voltage gain enable reliable performance in clinical and field-deployed devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad, rail-to-rail, low-noise op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4478AUD+ | No AEC-Q100 qualification; identical electrical specs and pinout. | Not approved for automotive safety-critical modules requiring /V suffix compliance. | Select MAX4478AUD/V+ when automotive qualification and extended temperature validation are mandatory. |
| OPA4188AIPWR | Zero-drift architecture (0.003µV/°C VOS drift); lower 1/f noise but higher 40nV/√Hz broadband noise at 1kHz. | Better for DC-coupled, ultra-stable gain blocks; less optimal for wideband AC signals due to higher noise floor. | Choose OPA4188AIPWR only if sub-µV offset drift dominates design requirements over wideband THD+N. |
Compared with MAX4478AUD+ and OPA4188AIPWR, the MAX4478AUD/V+ uniquely combines AEC-Q100 qualification, 4.5nV/√Hz noise, 10MHz GBW, and quad integration in TSSOP - making it the only option qualified for automotive sensor signal chains demanding both precision and reliability.
Availability
MAX4478AUD/V+ is available at Aetrix Electronics and suitable for automotive sensor modules, medical data acquisition systems, and industrial process controllers requiring stable component supply with full AEC-Q100 traceability and lifecycle management.
Supply support for MAX4478AUD/V+ 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 high-performance analog and mixed-signal ICs for automotive, industrial, and communications markets.
The MAX4475–MAX4478 family targets precision signal conditioning in noise-sensitive, wide-dynamic-range applications - specifically engineered for 16-bit+ data converters, sensor front-ends, and automotive-grade instrumentation.
FAQ
Does MAX4478AUD/V+ include a shutdown feature?
No, MAX4478AUD/V+ does not include a shutdown function. The SHDN pin is unassigned (N.C.) in its 14-pin TSSOP pinout, unlike the MAX4475/MAX4488 variants. All four amplifiers remain active whenever VDD and VSS are powered within specification. This simplifies biasing in always-on sensor monitoring systems but precludes power-gating during idle periods.
What is the maximum capacitive load drive capability of MAX4478AUD/V+?
MAX4478AUD/V+ is stable driving capacitive loads up to 200pF without external compensation, as confirmed in the datasheet's AC Electrical Characteristics table. This enables direct connection to ADC input capacitors, long PCB traces, or multiplexed analog buses without oscillation risk - critical for maintaining signal integrity in high-speed data acquisition.
Is MAX4478AUD/V+ pin-compatible with other MAX447x variants in TSSOP packages?
Yes, MAX4478AUD/V+ shares identical pinout and footprint with MAX4478AUD+ and MAX4478ASD+, including VDD (pin 11), VSS (pin 4), and all four amplifier I/Os. The /V suffix denotes AEC-Q100 qualification only - no physical or electrical pinout changes. This allows drop-in replacement in existing designs requiring automotive qualification.
What is the thermal resistance (θJA) of MAX4478AUD/V+ on a multilayer PCB?
The junction-to-ambient thermal resistance (θJA) for MAX4478AUD/V+ in its 14-pin TSSOP package is 100.4°C/W on a multilayer board, per Maxim's Package Information document. This value assumes standard JEDEC JESD51-7 test conditions and enables accurate junction temperature estimation under continuous 2.5mA × 4-channel operation at +125°C ambient.
Can MAX4478AUD/V+ operate from dual supplies?
Yes, MAX4478AUD/V+ supports dual-supply operation from ±1.35V to ±2.75V, as specified in the Absolute Maximum Ratings and Applications Information sections. When used in dual-supply mode, VSS connects to the negative rail (e.g., −2.75V) and VDD to the positive rail (e.g., +2.75V), preserving rail-to-rail output swing and input common-mode range relative to the new reference.
MAX4478AUD/V+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- Push-Pull, Rail-to-Rail
- Slew Rate:
- 3V/µs
- Gain Bandwidth Product:
- 10 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 70 µV
- Current - Supply:
- 2.5mA (x4 Channels)
- Current - Output / Channel:
- 48 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
MAX4478AUD/V+ FAQ
1.How can I place an order for MAX4478AUD/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4478AUD/V+ 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 MAX4478AUD/V+ reliable?
The price and inventory of MAX4478AUD/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4478AUD/V+ is usually 5 days.
3.What payment methods are accepted for MAX4478AUD/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4478AUD/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4478AUD/V+?
MAX4478AUD/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4478AUD/V+ 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 MAX4478AUD/V+?
For technical support, including MAX4478AUD/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4478AUD/V+ requirements.
6.How does Aetrix verify that MAX4478AUD/V+ is sourced from the original manufacturer or authorized distributors?
All MAX4478AUD/V+ 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 MAX4478AUD/V+ meets industry standards.
7.What is the process for return or replacement of MAX4478AUD/V+?
All MAX4478AUD/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4478AUD/V+, 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 MAX4478AUD/V+ part is unused and in its original packaging.
Return procedure for MAX4478AUD/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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