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Analog Devices Inc./Maxim Integrated MAX4489ASA+T
- Part No.:
- MAX4489ASA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4489ASA+T.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,367
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Product details
Overview
MAX4489ASA+T from Maxim Integrated is a dual, low-noise, low-distortion, rail-to-rail output operational amplifier optimized for high-fidelity signal conditioning. 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 +2.7V to +5.5V single supply - ideal for precision ADC buffering and medical sensor front-ends.
For engineers reviewing the MAX4489ASA+T datasheet, MAX4489ASA+T pinout, MAX4489ASA+T application, or MAX4489ASA+T equivalent, this page delivers verified specifications, package mapping to SO-8, functional role in ground-sensing analog signal chains, and validated alternative options for low-noise, wide-band op amp selection.
Technical Context
The MAX4489ASA+T belongs to the decompensated high-speed op amp variant of the MAX4475–MAX4478/MAX4488/MAX4489 family, internally compensated for stable operation at gains ≥ +5V/V. Its 10V/µs slew rate and 1.25MHz full-power bandwidth support fast settling (2µs to 0.01%) in demanding closed-loop configurations.
It integrates true rail-to-rail output stage capable of swinging within 80mV of both rails into 1kΩ, maintains input common-mode range extending 0.1V below VSS, and includes no phase reversal under overdrive - enabling robust interfacing with high-impedance sensors and unipolar data converters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 42MHz - supports stable closed-loop gain ≥ +5V/V with sufficient loop gain up to 1MHz signal bandwidth |
| Slew Rate | 10V/µs - enables clean 2VP-P output at 20kHz without slewing-induced distortion |
| THD+N (1kHz, RL = 1kΩ) | 0.0005% - meets 16-bit+ dynamic range requirements in precision DAC output stages |
| Input Voltage-Noise Density | 4.5nV/√Hz at 1kHz - minimizes contribution to system noise floor in microphone preamps and strain gauge amplifiers |
| Supply Voltage Range | +2.7V to +5.5V - compatible with Li-ion, USB, and industrial 3.3V/5V rails without level-shifting |
| Input Bias Current | ±1pA (typ) - preserves DC accuracy when driving high-impedance sources like piezoelectric transducers |
| Rail-to-Rail Output Swing | Within 80mV of VDD/VSS into 1kΩ - maximizes dynamic range in low-voltage systems |
Pinout & Package
MAX4489ASA+T is housed in an 8-pin SO (Small Outline) package (package code S8+4), with exposed thermal pad not present in SO variant. Pin 1 is marked by notch or dot; device is RoHS-compliant.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Output of amplifier A - drives external load or next stage; rail-to-rail swing capability critical for DAC buffer applications |
| 2 | INA− | Inverting input of amplifier A - connects to feedback network; input capacitance (10pF) requires feed-forward compensation above 5kΩ source impedance |
| 3 | INA+ | Noninverting input of amplifier A - accepts high-impedance sensor signals; common-mode range includes ground for single-supply operation |
| 4 | VSS | Negative supply / ground reference - must be low-impedance; all inputs referenced to this node |
| 5 | VDD | Positive supply - bypass with 0.1µF ceramic capacitor near pin to suppress supply noise coupling |
| 6 | INB+ | Noninverting input of amplifier B - independent channel for dual-path signal conditioning (e.g., differential sensor pair) |
| 7 | INB− | Inverting input of amplifier B - matched to INA− for consistent AC/DC performance across channels |
| 8 | OUTB | Output of amplifier B - fully independent; no crosstalk degradation above −90dB at 10kHz per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| 42MHz GBW with AV ≥ +5V/V stability | Enables high-gain, wide-bandwidth filters and active anti-aliasing stages without external compensation |
| 0.0005% THD+N (1kHz, 1kΩ) | Preserves signal integrity in audio-grade and medical instrumentation signal paths requiring >100dB SFDR |
| 4.5nV/√Hz input voltage noise | Reduces total integrated noise in 10Hz–100kHz band to <1.5µV RMS - critical for low-level sensor amplification |
| Rail-to-rail output into 1kΩ | Delivers full-scale swing from 2.7V supply, maximizing SNR in battery-powered portable equipment |
| No phase reversal on overdrive | Ensures predictable behavior during transient overload (e.g., ESD events or sensor saturation), simplifying protection design |
Applications
| ADC Buffers | DAC Output Amplifiers |
|---|---|
|
Use Scenario: Driving the unbuffered output of a 16-bit DAC (e.g., MAX5541) into a 10kΩ load while maintaining monotonicity and INL. IC Role / Device Role / Timing Role: Precision voltage follower/buffer with ultra-low IB (1pA typ) and rail-to-rail swing to preserve full DAC code resolution. Use Value: Eliminates offset error from input bias current, enabling true 16-bit accuracy without trimming. |
Use Scenario: Amplifying and level-shifting DAC output to ±2.5V range for bipolar actuator control in industrial PLC modules. IC Role / Device Role / Timing Role: Inverting gain-of-2 amplifier with matched dual channels for differential output generation. Use Value: Dual-channel matching ensures <0.1° phase skew between outputs, preserving waveform fidelity in servo drive feedback loops. |
| Low-Noise Microphone/Preamplifiers | Strain Gauges/Sensor Amplifiers |
|
Use Scenario: First-stage amplification of electret microphone output (10mV RMS, 2kΩ Zout) before ADC sampling at 48kHz. IC Role / Device Role / Timing Role: Noninverting gain-of100 amplifier with 4.5nV/√Hz noise density and 100dB CMRR. Use Value: Achieves >65dB SNR at 48kHz with <100nV/√Hz total input-referred noise, exceeding IEC 61672 Class 1 requirements. |
Use Scenario: Instrumentation amplifier front-end for quarter-bridge strain gauge (350Ω, 2mV/V) in digital scale load cell interface. IC Role / Device Role / Timing Role: Dual-op-amp implementation of difference amplifier with matched gain-setting resistors. Use Value: 120dB large-signal voltage gain and 0.0005% THD+N ensure sub-0.01% linearity error across full 10kg measurement range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, wide-band op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2189IDR | 36MHz GBW, zero-drift architecture, 5.2nV/√Hz noise, no shutdown pin | Better DC drift (<0.005µV/°C) but lower bandwidth and higher quiescent current (1.3mA vs. 2.5mA) | Prefer for ultra-stable DC-coupled sensor interfaces where drift dominates error budget |
| ADA4898-2ARMZ | 65MHz GBW, 1.1nV/√Hz noise, ±15V dual-supply only, no rail-to-rail output | Superior noise performance but incompatible with single-supply 2.7–5.5V systems | Select only when dual ±5V supply is available and sub-2nV/√Hz noise is mandatory |
Compared with OPA2189IDR and ADA4898-2ARMZ, MAX4489ASA+T uniquely balances 42MHz bandwidth, 4.5nV/√Hz noise, rail-to-rail output, and single-supply operation - making it optimal for space-constrained, battery-powered precision analog front-ends where supply headroom is limited.
Availability
MAX4489ASA+T is available at Aetrix Electronics and suitable for ADC buffering, DAC output amplification, low-noise microphone preamplification, and strain gauge signal conditioning requiring stable component supply across industrial, medical, and test equipment production cycles.
Supply support for MAX4489ASA+T 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 and mixed-signal ICs for demanding industrial, automotive, and medical applications.
The MAX4475–MAX4478/MAX4488/MAX4489 product line targets high-dynamic-range signal acquisition systems requiring simultaneous low noise, low distortion, rail-to-rail operation, and single-supply compatibility.
FAQ
What is the gain-bandwidth product of the MAX4489ASA+T?
The MAX4489ASA+T has a gain-bandwidth product of 42MHz, specified for closed-loop gains ≥ +5V/V. This value is confirmed in the AC Electrical Characteristics table (page 5) and reflects its decompensated internal architecture - unlike the unity-gain stable MAX4475–MAX4478 variants. The 42MHz GBWP enables stable operation in high-gain filter and instrumentation amplifier configurations up to ~1MHz signal bandwidth.
Does the MAX4489ASA+T include a shutdown feature?
No, the MAX4489ASA+T does not include a shutdown feature. According to the Selector Guide (page 15), only the single-channel MAX4475 and MAX4488 variants offer SHDN functionality. The MAX4489 is a dual-channel device without shutdown pin - confirmed by its pin configuration (no SHDN pin listed for SO-8 package) and absence of shutdown-related specs in its electrical characteristics tables.
What is the maximum capacitive load the MAX4489ASA+T can drive stably?
The MAX4489ASA+T is stable driving capacitive loads up to 200pF, as stated in the AC Electrical Characteristics table (page 6). This specification applies to unity-gain and minimum stable gain (+5V/V) configurations. For loads >100pF, feed-forward compensation (CZ) is recommended when the parallel resistance at the inverting input exceeds 5kΩ - per Application Information section (page 12).
Is the MAX4489ASA+T qualified for automotive applications?
No, the MAX4489ASA+T is not automotive-qualified. The ordering information (page 15) lists only MAX4475AUT/V+T and MAX4489AUA/V+T as /V automotive-grade variants. The MAX4489ASA+T carries no /V suffix and is rated for the standard industrial temperature range (−40°C to +125°C), not the extended AEC-Q100 stress-tested automotive qualification required for under-hood or safety-critical use.
What package type is used for the MAX4489ASA+T?
The MAX4489ASA+T uses an 8-pin SO (Small Outline) package, identified by package code S8+4 and outline number 21-0041. This is confirmed in the Ordering Information table (page 15) and Package Information section (page 3). Unlike TDFN or µMAX variants, the SO package has no exposed thermal pad and is lead(Pb)-free/RoHS-compliant (denoted by the "+" in the part number suffix).
MAX4489ASA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAX4489ASA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4489ASA+T 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+T reliable?
The price and inventory of MAX4489ASA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4489ASA+T is usually 5 days.
3.What payment methods are accepted for MAX4489ASA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4489ASA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4489ASA+T?
MAX4489ASA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4489ASA+T 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+T?
For technical support, including MAX4489ASA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4489ASA+T requirements.
6.How does Aetrix verify that MAX4489ASA+T is sourced from the original manufacturer or authorized distributors?
All MAX4489ASA+T 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+T meets industry standards.
7.What is the process for return or replacement of MAX4489ASA+T?
All MAX4489ASA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4489ASA+T, 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+T part is unused and in its original packaging.
Return procedure for MAX4489ASA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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