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Analog Devices Inc./Maxim Integrated MAX4489ASA+
- Part No.:
- MAX4489ASA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4489ASA+.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,906
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Product details
Overview
MAX4489ASA+ 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. It is used in ADC buffer stages for 16-bit data acquisition systems where DC accuracy and wide dynamic range are critical.
For engineers reviewing the MAX4489ASA+ datasheet, MAX4489ASA+ pinout, MAX4489ASA+ application, or MAX4489ASA+ equivalent, this page delivers verified electrical specifications, package-validated pin functions, real-world use cases in sensor and medical signal chains, and two confirmed alternative op amps with documented performance trade-offs.
Technical Context
The MAX4489ASA+ is a decompensated dual op amp internally stable only for closed-loop gains of +5V/V or greater - unlike unity-gain-stable variants (e.g., MAX4477). 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 to VSS − 0.1V) and true rail-to-rail outputs (within 80mV of rails at 1kΩ load), supporting single-supply operation without level-shifting. Input bias current is ≤150pA, enabling accurate amplification of high-impedance sources like piezoelectric transducers and strain gauges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 42MHz - enables stable closed-loop operation at AV ≥ +5V/V with usable bandwidth up to ~8MHz at AV = +5. |
| THD+N (1kHz, RL = 1kΩ) | 0.0005% - preserves signal integrity in 16-bit DAC output stages and medical preamplifiers. |
| Input Voltage-Noise Density | 4.5nV/√Hz at 1kHz - ensures minimal noise contribution when amplifying µV-level sensor signals. |
| Supply Voltage Range | +2.7V to +5.5V - supports direct interfacing with Li-ion battery-powered and 3.3V/5V embedded systems. |
| Input Bias Current | ±150pA max - avoids significant offset error when driving high-Z sources (e.g., >1MΩ bridge sensors). |
| Rail-to-Rail Output Swing | Within 80mV of VDD/VSS at 1kΩ load - maximizes dynamic range in low-voltage, single-supply applications. |
| Quiescent Supply Current | 2.5mA per amplifier at VDD = 5V - balances speed and power for always-on precision signal paths. |
Pinout & Package
MAX4489ASA+ is housed in an 8-pin SO (Small Outline) package (Package Code: S8+4), with exposed thermal pad not present in SO variant. Pin functions are validated per Maxim's official pin configuration diagram (Rev 11, p.15).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Output of Amplifier A - drives loads down to 1kΩ while maintaining rail-to-rail swing and DC accuracy. |
| 2 | INA− | Inverting input of Amplifier A - accepts differential or single-ended feedback configurations; input capacitance = 10pF. |
| 3 | INA+ | Noninverting input of Amplifier A - common-mode range includes VSS − 0.1V, enabling ground-referenced sensing. |
| 4 | VSS | Negative supply / ground reference - must be connected to system ground for single-supply operation. |
| 5 | VDD | Positive supply - bypass with 0.1µF ceramic capacitor close to pin for stable high-frequency operation. |
| 6 | INB+ | Noninverting input of Amplifier B - electrically isolated from Amplifier A; supports independent dual-channel signal paths. |
| 7 | INB− | Inverting input of Amplifier B - matched AC/DC characteristics to INA−; enables identical gain configurations per channel. |
| 8 | OUTB | Output of Amplifier B - fully independent output stage; no crosstalk degradation above −90dB at 10kHz (typ). |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise, decompensated architecture | 42MHz GBW + 10V/µs slew rate enables high-speed, low-distortion amplification at AV ≥ +5V/V. |
| Ground-sensing input stage | Input common-mode range extends to VSS − 0.1V, allowing direct interface with 0V-referenced sensors and transducers. |
| Rail-to-rail output with 1kΩ drive | Delivers full output swing (e.g., 0.08V to 4.92V at VDD = 5V) into 1kΩ loads - critical for maximizing ADC input range. |
| Ultra-low THD+N | 0.0005% at 1kHz/2VP-P into 1kΩ ensures <0.001 LSB error in 16-bit systems operating near full scale. |
| High open-loop gain & CMRR | 120dB large-signal voltage gain and 115dB CMRR (typ) maintain accuracy despite supply or common-mode noise. |
Applications
| ADC Buffer Stage | DAC Output Amplifier |
|---|---|
|
Use Scenario: Driving the unbuffered voltage output of a 16-bit DAC (e.g., MAX5541) into a 10kΩ load with <1LSB integral nonlinearity error. IC Role / Device Role / Timing Role: Precision voltage follower/buffer with sub-150pA input bias current and rail-to-rail output swing. Use Value: Eliminates DAC output loading errors and preserves monotonicity and differential linearity across full-scale range. |
Use Scenario: Amplifying and level-shifting the output of a 12–16-bit DAC in medical patient monitoring equipment requiring <−100dB THD. IC Role / Device Role / Timing Role: Gain-of-5 noninverting amplifier with 42MHz GBW and 0.0005% THD+N at 1kHz. Use Value: Enables clean, high-fidelity analog waveform generation (e.g., ECG excitation signals) without harmonic contamination. |
| Strain Gauge / Sensor Amplifier | Low-Noise Microphone Preamplifier |
|
Use Scenario: Conditioning mV-level Wheatstone bridge outputs from load cells or pressure sensors in industrial weighing systems. IC Role / Device Role / Timing Role: High-input-impedance, low-bias-current instrumentation amplifier front-end (gain ≥ +100V/V). Use Value: Minimizes offset drift and Johnson noise contribution, achieving <1µV/°C thermal error and <10nV/√Hz system noise floor. |
Use Scenario: First-stage amplification of electret microphone outputs in portable hearing aids or voice recorders. IC Role / Device Role / Timing Role: Low-noise, low-THD preamp with 4.5nV/√Hz input voltage noise and rail-to-rail output swing on 3.3V supply. Use Value: Preserves SNR across 20Hz–20kHz band without clipping or harmonic distortion, supporting >90dB A-weighted dynamic range. |
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 |
|---|---|---|---|
| OPA2188AIDR | Zero-drift architecture (0.005µV/°C VOS drift), lower 1/f noise, but 2MHz GBW and 0.8V/µs slew rate. | Better DC precision and long-term stability; unsuitable for >100kHz closed-loop gain ≥ +5V/V. | Select for ultra-stable DC-coupled sensor interfaces where bandwidth <200kHz suffices. |
| ADA4898-2ARMZ | 100MHz GBW, 210V/µs slew rate, higher 1.1nV/√Hz noise, no rail-to-rail output (clips ~1.2V from rails). | Superior speed and drive strength; requires dual supply or level-shifting for single-supply rail-to-rail output. | Select for high-speed active filters or video buffering where noise <4.5nV/√Hz is secondary to bandwidth. |
Compared with OPA2188AIDR and ADA4898-2ARMZ, the MAX4489ASA+ uniquely balances 42MHz bandwidth, rail-to-rail output, 4.5nV/√Hz noise, and 0.0005% THD+N in a cost-effective SO-8 package - making it optimal for precision, single-supply, medium-bandwidth signal chains.
Availability
MAX4489ASA+ is available at Aetrix Electronics and suitable for medical instrumentation, industrial sensor signal conditioning, and high-resolution data acquisition systems requiring stable component supply across extended temperature ranges (−40°C to +125°C).
Supply support for MAX4489ASA+ 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 precision, power, and interface applications in industrial, medical, and automotive markets.
The MAX4475–MAX4489 family was engineered specifically for low-noise, low-distortion, rail-to-rail signal conditioning in single-supply, space-constrained systems - targeting 16-bit+ data converters and sensitive sensor front-ends.
FAQ
What is the minimum stable gain for MAX4489ASA+?
The MAX4489ASA+ is internally compensated for 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 degraded phase margin. For unity-gain applications, consider the MAX4477 instead. The 42MHz GBW and 80° phase margin at AV = +5V/V ensure robust stability in high-speed filter and gain-stage designs.
Does MAX4489ASA+ include a shutdown feature?
No, MAX4489ASA+ does not include a shutdown pin. Shutdown functionality is only available on single-amplifier variants: MAX4475 and MAX4488. The MAX4489ASA+ is a dual op amp without SHDN capability - its quiescent current remains at 2.5mA per amplifier (5mA total) under all operating conditions.
What is the maximum capacitive load drive capability of MAX4489ASA+?
The MAX4489ASA+ maintains stability with capacitive loads up to 200pF, as specified in the datasheet. Driving larger loads (e.g., >500pF) requires external isolation resistance (e.g., 10–50Ω in series with the output) or careful compensation network design to prevent peaking or oscillation, especially in unity-gain follower configurations.
Is MAX4489ASA+ qualified for automotive applications?
No, MAX4489ASA+ is not AEC-Q100 qualified. Automotive-grade versions are explicitly marked with "/V" suffix (e.g., MAX4489ASA/V+T). The MAX4489ASA+ is rated for industrial temperature range (−40°C to +125°C) but lacks automotive qualification documentation, stress testing, or PPAP support required for automotive ECUs or ADAS modules.
Can MAX4489ASA+ operate from a 3.3V single supply?
Yes, MAX4489ASA+ operates from +2.7V to +5.5V single supply. At VDD = 3.3V, it delivers rail-to-rail output swing (within ~80mV of 0V and 3.3V), maintains 0.0005% THD+N at 1kHz, and draws 2.2mA per amplifier. Its input common-mode range includes ground, enabling direct interface with 0V-referenced sensors - ideal for portable 3.3V systems.
MAX4489ASA+ 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:
- 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-SOIC
MAX4489ASA+ FAQ
1.How can I place an order for MAX4489ASA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4489ASA+ 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 MAX4489ASA+ reliable?
The price and inventory of MAX4489ASA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4489ASA+ is usually 5 days.
3.What payment methods are accepted for MAX4489ASA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4489ASA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4489ASA+?
MAX4489ASA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4489ASA+ 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 MAX4489ASA+?
For technical support, including MAX4489ASA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4489ASA+ requirements.
6.How does Aetrix verify that MAX4489ASA+ is sourced from the original manufacturer or authorized distributors?
All MAX4489ASA+ 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 MAX4489ASA+ meets industry standards.
7.What is the process for return or replacement of MAX4489ASA+?
All MAX4489ASA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4489ASA+, 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 MAX4489ASA+ part is unused and in its original packaging.
Return procedure for MAX4489ASA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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