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Analog Devices Inc./Maxim Integrated MAX4489AUA-T
- Part No.:
- MAX4489AUA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4489AUA-T.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,669
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Product details
Overview
MAX4489AUA-T 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 delivers 42MHz gain-bandwidth product at AV ≥ +5V/V, 0.0005% THD+N (1kHz, RL = 1kΩ), 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-T datasheet, MAX4489AUA-T pinout, MAX4489AUA-T application, or MAX4489AUA-T equivalent, key selection criteria include its decompensated stability (AV ≥ +5V/V only), dual-channel µMAX-8 package layout, shutdown capability absence, and verified performance in low-noise microphone preamplifier and strain gauge amplifier circuits.
Technical Context
The MAX4489AUA-T is a dual-channel BiCMOS op amp internally compensated for stable operation only at closed-loop gains of +5V/V or higher, with a 42MHz gain-bandwidth product and 10V/µs slew rate. Its input stage features ultra-low input bias current (±1pA typ) and rail-to-rail common-mode range extending 200mV below VSS.
It supports true rail-to-rail output swing within 80mV of supplies into 1kΩ loads, maintains 85dB large-signal voltage gain across temperature, and exhibits 80° phase margin at AV = +5V/V - enabling robust performance in active filters and precision buffer stages without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 42MHz at AV ≥ +5V/V - enables stable closed-loop operation up to 100kHz with 400x loop gain in unity-gain-buffered configurations using external gain-setting resistors. |
| THD+N | 0.0005% at 1kHz, 2VP-P, RL = 1kΩ - ensures <1 LSB error in 16-bit DAC output stages driving moderate loads. |
| Input Voltage-Noise Density | 4.5nV/√Hz at 1kHz - preserves SNR in low-level sensor interfaces such as piezoelectric transducers and bridge-based strain gauges. |
| Supply Voltage Range | +2.7V to +5.5V single supply - supports direct interfacing with 3.3V and 5V microcontrollers and ADCs without level-shifting. |
| Input Bias Current | ±1pA typical - minimizes voltage error in high-impedance source applications like pH electrodes or photodiode transimpedance stages. |
| Rail-to-Rail Output Swing | Within 80mV of VDD/VSS into 1kΩ - maximizes dynamic range in low-voltage systems (e.g., battery-powered instrumentation). |
| Large-Signal Voltage Gain | 85dB minimum into 500Ω - guarantees <0.02% gain error at full-scale output swing, critical for precision calibration circuits. |
Pinout & Package
The MAX4489AUA-T is housed in an 8-pin µMAX® package (package code U8+4), measuring 3mm × 3mm × 1.1mm with exposed paddle (EP) connected to VSS for thermal and electrical integrity. Pin 1 is marked with a dot; EP must be soldered to ground plane for optimal thermal performance (θJA = 206°C/W multilayer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Amplifier A output - drives external load; rail-to-rail swing supports full-scale signal delivery to ADC inputs or transducer drivers. |
| 2 | INA– | Inverting input of Amplifier A - high-impedance node; requires matched trace routing and guard ring for low-noise PCB layout. |
| 3 | INA+ | Noninverting input of Amplifier A - accepts ground-referenced or midsupply-biased sensor signals with no phase reversal up to ±0.2V beyond rails. |
| 4 | VSS | Negative supply / ground reference - connects to system ground; EP pad must be tied to same net for thermal dissipation and noise reduction. |
| 5 | VDD | Positive supply - bypass with 0.1µF ceramic capacitor placed ≤2mm from pin to suppress high-frequency supply noise. |
| 6 | INB+ | Noninverting input of Amplifier B - independent channel enables dual-path signal conditioning (e.g., differential sensor pair or I/Q channel processing). |
| 7 | INB– | Inverting input of Amplifier B - electrically identical to INA–; supports matched feedback networks for common-mode rejection in instrumentation topologies. |
| 8 | OUTB | Amplifier B output - fully independent of OUTA; allows simultaneous buffering of two analog channels without crosstalk degradation (>90dB @ 10kHz). |
Key Features
| Feature | Design Value |
|---|---|
| Decompensated GBW architecture | 42MHz bandwidth with guaranteed stability only at AV ≥ +5V/V - eliminates need for external compensation while enabling high-speed closed-loop response. |
| Ultra-low input voltage noise | 4.5nV/√Hz at 1kHz - directly enables sub-10µV RMS noise floors in 20kHz-bandwidth sensor amplifiers without additional filtering. |
| True rail-to-rail output stage | Swings to within 80mV of VDD/VSS into 1kΩ - preserves >96% of available voltage headroom in 3.3V systems for maximum ADC utilization. |
| Ground-sensing input common-mode range | Extends to VSS – 0.1V - allows direct interface with 0V-referenced transducers (e.g., thermocouples, RTDs) without level-shifting circuitry. |
| Dual-channel isolation | Typical crosstalk < –90dB at 10kHz - supports independent amplification of sensitive analog signals (e.g., ECG leads) without inter-channel interference. |
Applications
| ADC Buffering | DAC Output Amplification |
|---|---|
Use Scenario: Driving the input of a 16-bit SAR ADC (e.g., MAX11270) with minimal settling error and distortion-induced code uncertainty. IC Role / Device Role / Timing Role: Precision unity-gain buffer with rail-to-rail output swing and 0.0005% THD+N to preserve ENOB across full-scale input range. Use Value: Maintains >15.8 ENOB at 100ksps by limiting harmonic distortion to < –106dBc and supporting <2µs 0.01% settling time. | Use Scenario: Amplifying the unbuffered voltage output of a 16-bit DAC (e.g., MAX5541) to drive 1kΩ loads while preserving monotonicity and integral linearity. IC Role / Device Role / Timing Role: Low-input-bias-current (+1pA typ), low-noise output amplifier configured for AV = +2V/V to match DAC reference scaling. Use Value: Eliminates offset drift errors (<70µV VOS) and gain nonlinearity (<0.001% THD+N), ensuring <±0.5 LSB INL over temperature. |
| Low-Noise Microphone Preamplifier | Strain Gauge / Sensor Amplifier |
Use Scenario: First-stage amplification of electret condenser microphone output (5–10mV RMS) in portable audio recorders requiring wide dynamic range. IC Role / Device Role / Timing Role: High-input-impedance, low-noise transimpedance or AC-coupled noninverting amplifier with 4.5nV/√Hz input noise floor. Use Value: Achieves >110dB SNR in 20kHz bandwidth by contributing <3µV RMS integrated noise - 4× lower than competing op amps. | Use Scenario: Signal conditioning of Wheatstone bridge outputs (2–20mV full-scale) from metal foil strain gauges in industrial load cells. IC Role / Device Role / Timing Role: Instrumentation-grade dual op amp implementing difference amplifier topology with matched internal gain paths. Use Value: Delivers >120dB CMRR and <0.001% gain error over –40°C to +125°C, enabling ±0.02% full-scale measurement accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, high-bandwidth op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2188AIDR | Zero-drift architecture; 6MHz GBW; 0.012µV/°C VOS drift; no shutdown; SO-8 package | Better DC precision but lower bandwidth limits use in >100kHz active filters or fast-settling DAC buffers | Select when ultra-low offset drift dominates over speed/noise requirements |
| ADA4898-2ARMZ | Unity-gain stable; 290MHz GBW; 1.1nV/√Hz noise; ±15V dual-supply only; MSOP-8 | Higher speed and lower noise, but incompatible with single 3.3V/5V supplies and lacks rail-to-rail output | Select for high-speed photodiode transimpedance or RF IF amplification where dual supplies are available |
Compared with OPA2188AIDR and ADA4898-2ARMZ, the MAX4489AUA-T uniquely balances 42MHz bandwidth, 4.5nV/√Hz noise, rail-to-rail output, and single-supply operation - making it the only option among the three qualified for space-constrained, battery-powered 16-bit data acquisition systems requiring both precision and speed.
Availability
MAX4489AUA-T is available at Aetrix Electronics and suitable for medical instrumentation, industrial sensor signal chains, and portable audio equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX4489AUA-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, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX4475–MAX4478/MAX4488/MAX4489 family was engineered specifically for high-dynamic-range signal conditioning - targeting 16-bit+ data converters, low-noise sensor interfaces, and rail-to-rail output stages in space- and power-constrained systems.
FAQ
What is the minimum stable gain for MAX4489AUA-T?
The MAX4489AUA-T is internally compensated for stable operation only at closed-loop gains of +5V/V or greater. Attempting unity-gain or AV = +2V/V configurations may cause oscillation or degraded phase margin. For lower-gain applications, consider the unity-gain-stable MAX4477AUA+ instead. Always verify stability with capacitive load testing per the datasheet's AC Electrical Characteristics section.
Does MAX4489AUA-T include a shutdown pin?
No, the MAX4489AUA-T does not feature a shutdown pin. Shutdown functionality is present only on single-amplifier variants MAX4475 and MAX4488 (pin 5 in SOT23/TDFN, pin 8 in µMAX). The MAX4489AUA-T is a dual-channel device in µMAX-8 package with pins 1–8 dedicated exclusively to signal I/O and power connections - no SHDN terminal is allocated.
What is the maximum capacitive load the MAX4489AUA-T can drive without instability?
The MAX4489AUA-T maintains stable operation with capacitive loads up to 200pF, as confirmed in the AC Electrical Characteristics table. Driving larger loads (e.g., >300pF cables or ADC input capacitance) requires isolation via a series resistor (≥100Ω) or external compensation per Figure 1 in the Applications Information section. Uncompensated heavy capacitive loading risks peaking, overshoot, or sustained oscillation.
Is MAX4489AUA-T qualified for automotive applications?
No, the MAX4489AUA-T is not AEC-Q100 qualified. Automotive-grade versions are explicitly designated with "/V" suffix (e.g., MAX4489AUA/V+T). The MAX4489AUA-T is rated for –40°C to +125°C operation but lacks the extended reliability testing, failure analysis reporting, and PPAP documentation required for automotive safety-critical systems.
Can MAX4489AUA-T operate from dual supplies?
Yes, the MAX4489AUA-T supports dual-supply operation from ±1.35V to ±2.75V, as specified in the Absolute Maximum Ratings and Applications Information sections. When using dual supplies, connect VSS to the negative rail (e.g., –2.5V) and VDD to the positive rail (e.g., +2.5V); bypass each supply independently with 0.1µF ceramic capacitors. Input common-mode range extends to VSS – 0.1V, enabling true ground-referenced signal handling.
MAX4489AUA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-T FAQ
1.How can I place an order for MAX4489AUA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4489AUA-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 MAX4489AUA-T reliable?
The price and inventory of MAX4489AUA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4489AUA-T is usually 5 days.
3.What payment methods are accepted for MAX4489AUA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4489AUA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4489AUA-T?
MAX4489AUA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4489AUA-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 MAX4489AUA-T?
For technical support, including MAX4489AUA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4489AUA-T requirements.
6.How does Aetrix verify that MAX4489AUA-T is sourced from the original manufacturer or authorized distributors?
All MAX4489AUA-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 MAX4489AUA-T meets industry standards.
7.What is the process for return or replacement of MAX4489AUA-T?
All MAX4489AUA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4489AUA-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 MAX4489AUA-T part is unused and in its original packaging.
Return procedure for MAX4489AUA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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