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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:1,146
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Product details
Overview
MAX4489AUA from Maxim Integrated is a dual-channel, decompensated, rail-to-rail output operational amplifier optimized for high-speed, low-noise signal conditioning in precision analog systems. It delivers 42MHz gain-bandwidth product at AV ≥ +5V/V, 10V/µs slew rate, 0.0005% THD+N (1kHz, RL = 1kΩ), and ultra-low input voltage-noise density of 4.5nV/√Hz - enabling high-fidelity buffering of 16-bit DAC outputs and sensor front-ends.
For engineers reviewing the MAX4489AUA datasheet, MAX4489AUA pinout, MAX4489AUA application, or MAX4489AUA equivalent, this page provides verified circuit role (dual decompensated op amp), package mapping (8-pin µMAX), thermal performance (θJA = 206°C/W multi-layer), shutdown capability (absent), and application-specific design meaning for medical instrumentation, ADC/DAC interfaces, and low-noise preamplification.
Technical Context
The MAX4489AUA belongs to the MAX4488/MAX4489 family of internally compensated op amps requiring minimum closed-loop gain of +5V/V for stability - distinct from unity-gain stable MAX4475–MAX4478 variants. Its BiCMOS process enables simultaneous low input bias current (±1pA typ) and high slew rate (10V/µs), supporting wide dynamic-range applications with capacitive-load drive up to 200pF.
Unlike single-channel MAX4488, the MAX4489AUA integrates two independent amplifiers in one 8-pin µMAX package, sharing no internal resources beyond common supply rails. Each channel features identical AC/DC specifications, including rail-to-rail output swing (within 80mV of rails at 1kΩ load), input common-mode range extending 0.1V below VSS, and guaranteed operation from –40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 42MHz at AV ≥ +5V/V - enables stable closed-loop designs for anti-aliasing filters or gain stages above 5× without external compensation. |
| Slew Rate | 10V/µs - supports full-scale settling of 2Vpp signals in ≤2µs, critical for fast DAC output buffering and pulse amplification. |
| THD+N | 0.0005% at 1kHz, RL = 1kΩ - preserves signal integrity in 16-bit data conversion paths where distortion must remain below LSB thresholds. |
| Input Voltage-Noise Density | 4.5nV/√Hz at 1kHz - minimizes added noise when amplifying microvolt-level signals from strain gauges or piezoelectric sensors. |
| Input Bias Current | ±1pA (typ) - prevents significant DC error when interfacing with high-impedance sources (>100MΩ), such as pH electrodes or photodiode transimpedance nodes. |
| Supply Voltage Range | +2.7V to +5.5V single supply - allows direct integration into 3.3V and 5V industrial, automotive, and portable systems without level-shifting. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial control environments per AEC-Q100 (note: /V suffix required for automotive qualification). |
Pinout & Package
The MAX4489AUA is housed in an 8-pin µMAX package (package code U8+4), featuring exposed pad (EP) connected to VSS for enhanced thermal dissipation. Thermal resistance is θJA = 206°C/W on multi-layer board.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Channel A output - rail-to-rail capable, drives loads down to 1kΩ while maintaining DC accuracy and phase margin >80°. |
| 2 | INA– | Inverting input for Channel A - high-impedance node (RIN = 1000GΩ); requires matched layout to INA+ to minimize CMRR degradation. |
| 3 | INA+ | Noninverting input for Channel A - common-mode range includes ground; supports single-supply sensor biasing without level shifters. |
| 4 | VSS | Negative supply - connect directly to system ground or negative rail; EP pad must be soldered to VSS plane for thermal compliance. |
| 5 | VDD | Positive supply - bypass with 0.1µF ceramic capacitor placed <2mm from pin to suppress high-frequency supply noise coupling. |
| 6 | INB+ | Noninverting input for Channel B - electrically isolated from Channel A; enables dual-path signal conditioning without crosstalk (–90dB @ 1MHz). |
| 7 | INB– | Inverting input for Channel B - identical electrical characteristics to INA–; supports independent feedback networks per channel. |
| 8 | OUTB | Channel B output - fully independent of OUTA; allows simultaneous processing of differential sensor pairs or I/Q signal paths. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Swings within 80mV of VDD/VSS at 1kΩ load - maximizes dynamic range in low-voltage systems (e.g., 3.3V ADC reference buffers). |
| Low input voltage-noise density | 4.5nV/√Hz at 1kHz - reduces integrated noise in bandwidth-limited sensor interfaces, critical for strain gauge and microphone preamps. |
| High gain-bandwidth product | 42MHz at AV ≥ +5V/V - enables stable active filter designs up to 1MHz cutoff with minimal component count and phase error. |
| Capacitive-load stability | Stable with CL ≤ 200pF - eliminates need for isolation resistors when driving ADC inputs or long PCB traces, preserving signal fidelity. |
| Wide input common-mode range | Extends 0.1V below VSS - supports ground-referenced transducer inputs without external bias networks or level shifters. |
Applications
| ADC Buffering | DAC Output Amplification |
|---|---|
|
Use Scenario: Driving the analog input of a 16-bit SAR ADC (e.g., MAX11270) with minimal settling error and distortion. IC Role / Device Role / Timing Role: Precision buffer isolating DAC output impedance from ADC sampling switch, ensuring full-scale linearity and SNR preservation. Use Value: 0.0005% THD+N and 4.5nV/√Hz noise prevent harmonic folding and quantization noise floor elevation in high-resolution digitization. |
Use Scenario: Amplifying and level-shifting the unbuffered voltage output of a 16-bit DAC (e.g., MAX5541) to ±2.5V rails. IC Role / Device Role / Timing Role: Gain-stage amplifier with rail-to-rail output swing and <2µs settling time, enabling fast update rates without droop. Use Value: 10V/µs slew rate and 42MHz GBW ensure monotonic step response and <0.01% gain error across full temperature range. |
| Low-Noise Sensor Signal Conditioning | Medical Instrumentation Front-End |
|
Use Scenario: Amplifying microvolt-level signals from strain gauges or piezoresistive pressure sensors in industrial weighing systems. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier with ultra-low input bias current (±1pA) and low 1/f noise corner. Use Value: Input bias current <150pA max avoids loading high-Z Wheatstone bridges; 260nVp-p 0.1–10Hz noise ensures sub-milligram resolution. |
Use Scenario: Biopotential signal acquisition in ECG/EEG systems requiring high CMRR and low electrode-skin interface noise. IC Role / Device Role / Timing Role: Differential input stage with >90dB CMRR and rail-to-rail output driving ADC reference buffers. Use Value: Input common-mode range including ground enables direct connection to patient electrodes; 125°C rating supports sterilizable probe designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, high-speed, low-noise op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2189IDR | Zero-drift architecture, 5.7MHz GBW, 0.1µV/°C VOS drift vs. MAX4489AUA's 0.3µV/°C; higher quiescent current (1.3mA vs. 2.5mA per amp). | Better DC precision for DC-coupled sensor interfaces; lower bandwidth limits use in >500kHz active filters. | Select OPA2189IDR when offset drift dominates error budget over noise or speed requirements. |
| ADA4898-2ARMZ | Higher slew rate (25V/µs), wider GBW (210MHz), but higher input voltage noise (1.1nV/√Hz) and no rail-to-rail output (clips ~1.2V from rails). | Superior transient response for video or RF IF amplification; unsuitable for low-voltage rail-to-rail output applications. | Select ADA4898-2ARMZ when speed and large-signal fidelity outweigh noise and output swing constraints. |
Compared with OPA2189IDR and ADA4898-2ARMZ, the MAX4489AUA uniquely balances 42MHz bandwidth, 4.5nV/√Hz noise, rail-to-rail output, and 2.5mA quiescent current - making it optimal for battery-powered, high-resolution data acquisition where both AC fidelity and DC accuracy matter.
Availability
MAX4489AUA is available at Aetrix Electronics and suitable for medical instrumentation, industrial sensor signal conditioning, and high-accuracy DAC/ADC interface applications requiring stable component supply across extended temperature ranges and long production lifecycles.
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 precision analog and mixed-signal ICs for demanding industrial, automotive, and medical applications, emphasizing low noise, high accuracy, and robust operation.
The MAX4475–MAX4478/MAX4488/MAX4489 product line targets high-fidelity signal conditioning in data acquisition systems, delivering rail-to-rail operation, ultra-low noise, and decompensated speed for precision sensor and converter interfaces.
FAQ
What is the minimum stable gain for MAX4489AUA?
The MAX4489AUA is internally compensated for closed-loop gains of +5V/V or greater. Operating at gains below +5V/V risks instability, oscillation, or degraded phase margin (<80°). For unity-gain or low-gain applications, select the MAX4475–MAX4478 series instead. This gain constraint is inherent to the decompensated architecture and is verified across –40°C to +125°C.
Does MAX4489AUA include a shutdown feature?
No, the MAX4489AUA does not include a shutdown input. Shutdown functionality is only available on single-channel variants MAX4475 and MAX4488 (pin 5 = SHDN). The MAX4489AUA has no dedicated shutdown pin - all eight pins are assigned to power, inputs, or outputs. Power-down must be implemented externally via supply switching or enable circuitry.
What package type is used for MAX4489AUA?
The MAX4489AUA uses the 8-pin µMAX package (outline 21-0036, land pattern 90-0092), identified by package code U8+4. It features an exposed thermal pad (EP) that must be soldered to the VSS plane for thermal compliance. This compact 3mm × 3mm package supports high-density layouts while maintaining θJA = 206°C/W on multi-layer boards.
Is 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 Grade 2 (–40°C to +105°C). Always verify ordering code suffixes - /V parts have distinct top markings (+AA/V) and test documentation.
What is the maximum capacitive load the MAX4489AUA can drive stably?
The MAX4489AUA is specified to remain stable with capacitive loads up to 200pF, as confirmed by phase margin >80° and absence of sustained oscillations in production testing. Driving larger loads (e.g., >500pF) requires external isolation resistors or feedback network adjustments to maintain stability - consult Figure 1 in the datasheet for feed-forward compensation guidance.
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:
- 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 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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