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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:2,481
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Product details
Overview
The MAX4489ASA from Maxim Integrated is a dual, low-noise, low-distortion, rail-to-rail output operational amplifier optimized for high-fidelity signal conditioning. It features a 42MHz gain-bandwidth product (stable at AV ≥ +5V/V), ultra-low THD+N of 0.0004% at 1kHz (RL = 10kΩ), input voltage-noise density of 4.5nV/√Hz at 1kHz, and operates from a single +2.7V to +5.5V supply - making it ideal for precision ADC buffers and medical sensor front-ends.
For engineers reviewing the MAX4489ASA datasheet, MAX4489ASA pinout, MAX4489ASA application, or MAX4489ASA equivalent, this page delivers verified electrical specifications, package-specific terminal mapping, real-world use-value context for low-noise instrumentation, and validated alternative options for gain ≥5V/V, wide-band, shutdown-free dual op amp designs.
Technical Context
The MAX4489ASA belongs to the decompensated dual op amp variant of the MAX4475–MAX4489 family, internally compensated for stable operation only at closed-loop gains of +5V/V or greater. Its 42MHz GBW and 10V/µs slew rate enable high-speed, low-distortion amplification in fixed-gain configurations where unity-gain stability is not required.
It shares the same BiCMOS process, rail-to-rail output stage, ground-sensing input common-mode range (down to VSS − 0.1V), and low-input bias current (±1pA typ) as other family members, but lacks the SHDN pin present on single-channel MAX4475/MAX4488 variants - confirming its role as a dedicated dual-channel, non-shutdown signal path device.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 42MHz - supports stable closed-loop gain ≥+5V/V up to ~8MHz signal bandwidth with margin. |
| THD+N (1kHz, RL=10kΩ) | 0.0004% - enables 16-bit+ dynamic range preservation in precision DAC output stages. |
| Input Voltage-Noise Density | 4.5nV/√Hz at 1kHz - critical for low-level sensor amplification without adding measurable noise floor. |
| Supply Voltage Range | +2.7V to +5.5V single supply - compatible with modern low-voltage microcontrollers and battery-powered systems. |
| Input Bias Current | ±1pA typical - ensures minimal error when buffering high-impedance sources like piezoelectric transducers or strain gauges. |
| Rail-to-Rail Output Swing | Within 80mV of rails (RL = 1kΩ) - maximizes usable output voltage headroom in 3.3V or 5V systems. |
| Operating Temperature | −40°C to +125°C - qualified for industrial and automotive under-hood environments. |
Pinout & Package
The MAX4489ASA is supplied in an 8-pin SO (Small Outline) package with exposed pad (EP) connected to VSS per Maxim's land pattern 90-0096. Pin 1 is marked by a beveled corner or dot; the EP must be soldered to a grounded thermal pad for optimal thermal performance (θJA = 132°C/W multilayer).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Output of Amplifier A - drives external load; rail-to-rail swing capability enables full-supply utilization. |
| 2 | INA− | Inverting input of Amplifier A - high-impedance node; requires matched layout for CMRR optimization. |
| 3 | INA+ | Noninverting input of Amplifier A - accepts signals down to VSS − 0.1V; enables true ground-referenced sensing. |
| 4 | VSS | Negative supply / ground reference - all internal circuitry referenced here; EP must connect to this pin. |
| 5 | VDD | Positive supply - bypass with 0.1µF ceramic capacitor placed <1cm from pin for PSRR integrity. |
| 6 | INB+ | Noninverting input of Amplifier B - independent channel; identical specs and bias behavior as INA+. |
| 7 | INB− | Inverting input of Amplifier B - electrically isolated from Channel A; supports differential or independent gain paths. |
| 8 | OUTB | Output of Amplifier B - fully independent output stage; no crosstalk degradation above −90dB at 1MHz. |
Key Features
| Feature | Design Value |
|---|---|
| 42MHz GBW with AV ≥ +5V/V stability | Enables high-speed, fixed-gain instrumentation without external compensation components. |
| 0.0004% THD+N @ 1kHz | Preserves signal fidelity in audio-grade and 16-bit data acquisition systems without post-processing correction. |
| 4.5nV/√Hz input voltage noise | Minimizes added noise in mic preamps, ECG front-ends, and low-level transducer interfaces. |
| Rail-to-rail output with 1kΩ drive | Maintains DC accuracy while delivering ±5mA peak current into low-impedance loads. |
| −40°C to +125°C operation | Validated performance across automotive and industrial temperature extremes without derating. |
Applications
| ADC Buffering | DAC Output Amplification |
|---|---|
Use Scenario: Driving the input of a 16-bit SAR ADC (e.g., MAX11270) with a high-impedance source. IC Role / Device Role / Timing Role: Low-noise, low-IBIAS buffer isolating source impedance from ADC sampling capacitor. Use Value: 1pA input bias prevents code-dependent offset errors; 4.5nV/√Hz noise avoids degrading ENOB below 15.8 bits. |
Use Scenario: Amplifying the unbuffered voltage output of a precision DAC (e.g., MAX5541) to ±5V range. IC Role / Device Role / Timing Role: Fixed-gain (+5V/V) output stage ensuring monotonicity and settling within 2µs to 0.01%. Use Value: 0.0005% THD+N at 1kHz preserves spectral purity; rail-to-rail swing maximizes dynamic range utilization. |
| Medical Sensor Signal Conditioning | Strain Gauge / Wheatstone Bridge Amplification |
Use Scenario: Front-end amplification of ECG electrode signals with DC-coupled, high-common-mode-rejection topology. IC Role / Device Role / Timing Role: Dual-channel IA driver providing matched gain and offset tracking for lead-I/II/III derivation. Use Value: Input common-mode range extending to VSS − 0.1V enables true ground-referenced biopotential acquisition. |
Use Scenario: Amplifying mV-level differential outputs from 350Ω foil strain gauges in load cells or pressure sensors. IC Role / Device Role / Timing Role: Precision dual op amp configured as difference amplifier with gain = 1000V/V. Use Value: 70µV max VOS and 0.3µV/°C tempco minimize zero-drift; 120dB large-signal AVOL ensures linearity over full scale. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual, high-speed, low-noise op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2189IDR | Zero-drift architecture; 5.7nV/√Hz noise; 2MHz GBW; no shutdown; VOS = 5µV max. | Better DC precision (offset/tempco), lower noise at <100Hz, but insufficient bandwidth for >200kHz signal chains. | Select for ultra-stable DC-coupled sensor interfaces where bandwidth ≤1MHz suffices. |
| ADA4898-2ARMZ | Unity-gain stable; 290MHz GBW; 1.1nV/√Hz noise; ±15V dual supply; no rail-to-rail output. | Superior speed/noise for high-frequency photodiode or RF IF amplification, but incompatible with single-supply ≤5.5V systems. | Select for high-speed, dual-supply, low-noise applications requiring >100MHz bandwidth and sub-nV/√Hz noise. |
Compared with OPA2189IDR and ADA4898-2ARMZ, the MAX4489ASA uniquely balances 42MHz bandwidth, rail-to-rail output, 4.5nV/√Hz noise, and single-supply operation - making it the only option among the three suitable for 3.3V/5V, gain ≥+5V/V, low-distortion, dual-channel instrumentation where both speed and supply flexibility are mandatory.
Availability
The MAX4489ASA is available at Aetrix Electronics and suitable for industrial sensor interfaces, medical instrumentation, and precision data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.
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) is a semiconductor design leader specializing in high-performance analog, mixed-signal, and power management ICs for demanding industrial, medical, and automotive applications.
The MAX4489ASA belongs to Maxim's precision op amp product line, engineered specifically for low-noise, low-distortion, rail-to-rail signal conditioning in space-constrained, single-supply systems operating across harsh temperature environments.
FAQ
What is the gain-bandwidth product and minimum stable gain of the MAX4489ASA?
The MAX4489ASA has a gain-bandwidth product of 42MHz and is internally compensated for stable operation only at closed-loop gains of +5V/V or greater. It is not unity-gain stable - attempting AV = +1V/V may cause oscillation. This makes it ideal for fixed high-gain signal chains like DAC output amplifiers or bridge sensor interfaces where gain ≥5 is standard.
Does the MAX4489ASA include a shutdown pin?
No, the MAX4489ASA does not feature a shutdown (SHDN) pin. Shutdown functionality is exclusive to the single-channel MAX4475 and MAX4488 variants. The MAX4489ASA is a dual-channel device with no power-management control pins - both amplifiers operate continuously when powered within the +2.7V to +5.5V supply range.
What is the input voltage-noise density of the MAX4489ASA, and at what frequency is it specified?
The MAX4489ASA has an input voltage-noise density of 4.5nV/√Hz at 1kHz, 3.5nV/√Hz at 30kHz, and 21nV/√Hz at 10Hz. Its 1/f noise corner is low (~10Hz), making it exceptionally quiet across audio and instrumentation bandwidths - critical for preserving SNR in microphone preamplifiers and ECG front-ends.
Can the MAX4489ASA drive capacitive loads, and what is the maximum stable value?
Yes, the MAX4489ASA can drive capacitive loads up to 200pF without sustained oscillation, as confirmed by its capacitive-load stability specification. For loads >100pF, careful PCB layout (short traces, local ground plane) and optional feed-forward compensation (CZ = 10 × RF/RG pF) are recommended to maintain phase margin above 80° in high-gain configurations.
What package type and pin count does the MAX4489ASA use, and is the exposed pad internally connected?
The MAX4489ASA uses an 8-pin SO (Small Outline) package with an exposed thermal pad (EP). Per Maxim's datasheet and land pattern 90-0096, the EP is internally connected to VSS and must be soldered to a grounded copper area on the PCB to achieve the rated θJA = 132°C/W (multilayer board) and ensure reliable operation at full temperature range.
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:
- 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-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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