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Analog Devices Inc./Maxim Integrated MAX4489AUA+
- Part No.:
- MAX4489AUA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4489AUA+.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,994
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Product details
Overview
The MAX4489AUA+ from Maxim Integrated is a dual, low-noise, low-distortion, rail-to-rail output operational amplifier optimized for high-fidelity signal conditioning in precision analog systems. It features 42MHz gain-bandwidth product (AV ≥ +5V/V), 0.0005% THD+N at 1kHz with 1kΩ load, 4.5nV/√Hz input voltage-noise density, and operates from a single +2.7V to +5.5V supply - making it ideal for 16-bit DAC output amplification and medical sensor front-ends.
For engineers reviewing the MAX4489AUA+ datasheet, MAX4489AUA+ pinout, MAX4489AUA+ application, or MAX4489AUA+ equivalent, this page delivers verified specifications, package-validated pin functions, real-world use-value context for ADC/DAC buffering and low-noise preamplification, and two technically documented alternative parts with explicit functional and application-level differences.
Technical Context
The MAX4489AUA+ belongs to the decompensated op amp variant family (MAX4488/MAX4489), internally compensated for stable operation only at closed-loop gains of +5V/V or greater. Its 10V/µs slew rate and 42MHz GBW enable fast settling (2µs to 0.01%) while maintaining ultra-low distortion across audio and instrumentation bandwidths.
It integrates ground-sensing inputs (common-mode range extends 0.1V below VSS) and true rail-to-rail outputs capable of swinging within 80mV of either rail into 1kΩ, with shutdown functionality available on single-amplifier variants (not present on MAX4489). Input bias current is as low as ±1pA (typ), supporting high-impedance sensor interfaces without significant DC error.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 42MHz - enables stable closed-loop gain ≥ +5V/V with sufficient loop gain for low distortion up to ~1MHz. |
| THD+N (1kHz, 2VP-P, RL = 1kΩ) | 0.0005% - ensures <1 LSB error in 16-bit systems when driving moderate loads. |
| Input Voltage-Noise Density | 4.5nV/√Hz at 1kHz - preserves SNR in microphone preamps and strain gauge amplifiers. |
| Supply Voltage Range | +2.7V to +5.5V - supports direct interfacing with 3.3V and 5V microcontrollers and data converters. |
| Input Offset Voltage (TA = +25°C) | ±70µV - minimizes DC error in precision DC-coupled gain stages and active filters. |
| Slew Rate | 10V/µs - allows full-scale 2V step response in under 200ns, critical for pulse and transient fidelity. |
| Operating Temperature Range | -40°C to +125°C - qualified for industrial and automotive environments per AEC-Q100 (note: /V suffix required for automotive). |
Pinout & Package
The MAX4489AUA+ is housed in an 8-pin µMAX® package (package code U8+4), with exposed paddle connected to VSS for thermal performance. Pinout is identical to industry-standard SO-8 but in a 3mm × 3mm footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7 | OUTA, OUTB | Dual independent amplifier outputs; rail-to-rail swing into 1kΩ load with <80mV headroom. |
| 2, 6 | INA-, INB- | Inverting inputs; high-impedance (1000GΩ), low-bias-current (±1pA) nodes for precision feedback networks. |
| 3, 5 | INA+, INB+ | Noninverting inputs; common-mode range includes ground (VSS − 0.1V), enabling single-supply sensor interfacing. |
| 4 | VSS | Negative supply rail; must be connected to system ground in single-supply configurations. |
| 8 | VDD | Positive supply rail; requires local 0.1µF ceramic bypass capacitor for stability and noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Swings within 80mV of VDD/VSS into 1kΩ - maximizes dynamic range in low-voltage systems (e.g., 3.3V ADC buffers). |
| Ultra-low THD+N | 0.0005% at 1kHz enables 16-bit DAC linearity preservation without post-conversion trimming. |
| Low input voltage-noise density | 4.5nV/√Hz at 1kHz - critical for preserving SNR in piezoelectric transducer and ECG front-ends. |
| High open-loop gain | 120dB large-signal voltage gain ensures <0.001% gain error in unity-gain buffer configurations. |
| Capacitive-load stability | Stable with up to 200pF load - simplifies PCB layout for long traces or ADC input capacitance without external compensation. |
Applications
| ADC Buffers | DAC Output Amplifiers |
|---|---|
Use Scenario: Driving the input of a 16-bit SAR ADC (e.g., MAX11270) with minimal settling time and no missing codes. IC Role / Device Role / Timing Role: Precision unity-gain buffer isolating DAC output impedance from ADC sampling switch. Use Value: 2µs settling to 0.01% and ±70µV VOS prevent differential nonlinearity (DNL) errors in high-resolution conversion. |
Use Scenario: Amplifying and level-shifting the unbuffered voltage output of a 16-bit DAC (e.g., MAX5541) to full-scale range. IC Role / Device Role / Timing Role: Low-bias-current (±1pA) gain stage preserving DC accuracy and minimizing offset drift. Use Value: 150pA max IBIAS eliminates >6nA error threshold, ensuring monotonicity and 16-bit accuracy over temperature. |
| Low-Noise Microphone/Preamplifiers | Strain Gauges/Sensor Amplifiers |
Use Scenario: First-stage amplification of electret condenser microphone output before anti-alias filtering. IC Role / Device Role / Timing Role: High-input-impedance, low-noise transimpedance or noninverting amplifier. Use Value: 4.5nV/√Hz input noise and 0.5fA/√Hz current noise preserve SNR in 20Hz–20kHz audio band. |
Use Scenario: Instrumentation-grade amplification of mV-level Wheatstone bridge outputs from load cells or pressure sensors. IC Role / Device Role / Timing Role: Dual-channel differential gain stage with matched internal amplifiers reducing common-mode drift. Use Value: 115dB CMRR (typ) and 120dB AVOL suppress bridge imbalance errors and maintain <0.001% gain stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, high-speed op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA211AIDR | Lower noise (1.1nV/√Hz), lower GBW (45MHz), no shutdown, SO-8 package. | Better for ultra-low-noise DC-coupled applications; less suitable for high-THD-sensitive AC-coupled DAC buffering due to higher 1/f noise corner. | Select when sub-2nV/√Hz noise dominates design priority over THD+N spec. |
| ADA4898-2ARMZ | Higher slew rate (275V/µs), higher supply current (10mA), wider supply range (±5V to ±15V), MSOP-8. | Targeted at high-speed active filter and video line driver roles; overqualified for low-power portable instrumentation. | Select when >100MHz small-signal bandwidth or bipolar supply operation is required. |
Compared with OPA211AIDR and ADA4898-2ARMZ, the MAX4489AUA+ uniquely balances 4.5nV/√Hz noise, 0.0005% THD+N, and 2.5mA quiescent current in a space-constrained µMAX package - making it optimal for battery-powered, high-resolution data acquisition where both noise and distortion must be simultaneously minimized.
Availability
The MAX4489AUA+ is available at Aetrix Electronics and suitable for precision ADC buffering, DAC output amplification, and low-noise sensor signal conditioning requiring stable component supply across industrial, medical, and test equipment programs.
Supply support for MAX4489AUA+ 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, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX4475–MAX4489 family was engineered specifically for wide-dynamic-range, low-distortion signal chains - targeting 16-bit+ data converter interfaces, medical instrumentation front-ends, and precision sensor amplifiers where noise, THD, and rail-to-rail operation are co-critical.
FAQ
What is the gain stability requirement for the MAX4489AUA+?
The MAX4489AUA+ is internally compensated for stable operation only at closed-loop gains of +5V/V or greater. It is not unity-gain stable. Attempting to use it at AV = +1V/V may cause oscillation or excessive overshoot. For unity-gain applications, select the MAX4475–MAX4478 series instead. The MAX4489AUA+ datasheet specifies 42MHz GBW and 80° phase margin specifically under AV ≥ +5V/V conditions.
Does the MAX4489AUA+ include a shutdown pin?
No, the MAX4489AUA+ does not include a shutdown (SHDN) pin. Shutdown functionality is only available on single-amplifier variants: MAX4475 and MAX4488. The dual MAX4489AUA+ has eight pins fully allocated to dual amplifier I/O and supplies (pins 1/7 = OUTA/OUTB, 2/6 = IN-/IN-, 3/5 = IN+/IN+, 4 = VSS, 8 = VDD), with no dedicated control pin. Power-down must be implemented externally via supply switching.
What is the maximum capacitive load the MAX4489AUA+ can drive without instability?
The MAX4489AUA+ is specified to remain stable with capacitive loads up to 200pF, as confirmed in the AC Electrical Characteristics table and Typical Operating Characteristics (Figure MAX4475 toc19). This applies across its full operating temperature range (-40°C to +125°C) and supply voltages (+2.7V to +5.5V). Loads exceeding 200pF require isolation resistance or external compensation per the feed-forward capacitor guidelines in the Applications Information section.
Is the MAX4489AUA+ qualified for automotive applications?
The base MAX4489AUA+ is not AEC-Q100 qualified. Automotive qualification requires the /V suffix (e.g., MAX4489AUA/V+T), which denotes additional testing and screening per AEC-Q100 Rev G. The MAX4489AUA+ carries the same die and µMAX package as the /V version but lacks the automotive-specific reliability validation. For automotive designs, specify MAX4489AUA/V+T and verify availability through authorized channels.
How does the input common-mode voltage range of the MAX4489AUA+ support single-supply sensor interfacing?
The MAX4489AUA+ supports an input common-mode voltage range extending from (VSS − 0.1V) to (VDD − 1.7V) over temperature, meaning it accepts signals down to 100mV below ground in single-supply configurations. This "ground-sensing" capability allows direct connection of bridge sensors, thermocouples, or other transducers whose output may dip slightly negative relative to system ground - eliminating the need for level-shifting circuitry and preserving DC accuracy in precision measurement systems.
MAX4489AUA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Push-Pull, Rail-to-Rail
- Slew Rate:
- 10V/µs
- Gain Bandwidth Product:
- 42 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 70 µV
- Current - Supply:
- 2.5mA (x2 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:
- 8-uMAX/uSOP
MAX4489AUA+ FAQ
1.How can I place an order for MAX4489AUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4489AUA+ 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 MAX4489AUA+ reliable?
The price and inventory of MAX4489AUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4489AUA+ is usually 5 days.
3.What payment methods are accepted for MAX4489AUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4489AUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4489AUA+?
MAX4489AUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4489AUA+ 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 MAX4489AUA+?
For technical support, including MAX4489AUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4489AUA+ requirements.
6.How does Aetrix verify that MAX4489AUA+ is sourced from the original manufacturer or authorized distributors?
All MAX4489AUA+ 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 MAX4489AUA+ meets industry standards.
7.What is the process for return or replacement of MAX4489AUA+?
All MAX4489AUA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4489AUA+, 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 MAX4489AUA+ part is unused and in its original packaging.
Return procedure for MAX4489AUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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