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Analog Devices Inc. ADA4075-2ARZ
- Part No.:
- ADA4075-2ARZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADA4075-2ARZ.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,698
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Product details
Overview
ADA4075-2 from Analog Devices is a dual, ultralow-noise, precision operational amplifier optimized for high-fidelity audio and precision instrumentation. It delivers 2.8 nV/√Hz voltage noise at 1 kHz, 0.0002% THD+N, 6.5 MHz gain bandwidth, ±4.5 V to ±18 V dual-supply operation, and unity-gain stability in both SOIC and 2 mm × 2 mm LFCSP packages.
For engineers reviewing the ADA4075-2 datasheet, ADA4075-2 pinout, ADA4075-2 application, or ADA4075-2 equivalent, this page provides verified specifications, package-specific pin functions, real-world use cases in professional audio and sensor front ends, and validated alternative op amps with documented functional trade-offs.
Technical Context
The ADA4075-2 employs Analog Devices' iPolar® bipolar process-featuring vertical junction isolation and lateral trench isolation-to achieve ultralow noise (2.8 nV/√Hz) and low distortion (0.0002%) at only 1.8 mA per amplifier. Its 12 V/µs slew rate and 6.5 MHz GBP support fast settling (3 µs to 0.01%) in demanding signal conditioning paths.
It integrates phase reversal protection that clamps output to ~2 V from rails when inputs exceed common-mode range, and includes internal input clamp diodes (±1.2 V differential limit) without series current-limiting resistors-preserving its 2.8 nV/√Hz noise floor. CMRR exceeds 110 dB and PSRR exceeds 106 dB across temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Noise Density | 2.8 nV/√Hz at 1 kHz - enables sub-μV signal amplification in low-level sensor and microphone preamp stages |
| Total Harmonic Distortion + Noise | 0.0002% typical at 1 kHz, 3 Vrms - meets professional audio line-level fidelity requirements |
| Gain Bandwidth Product | 6.5 MHz - supports stable closed-loop gain ≥10 up to ~650 kHz with adequate phase margin |
| Slew Rate | 12 V/µs - ensures <3 µs settling to 0.01% for 10 V step, critical for DAC output filtering and active filters |
| Supply Current per Amplifier | 1.8 mA typical (±4.5 V to ±18 V) - balances low power with high dynamic performance in space-constrained designs |
| Input Offset Voltage | 1 mV maximum (−40°C to +125°C) - maintains dc accuracy in integrators and precision transimpedance amplifiers |
| Common-Mode Rejection Ratio | 106 dB minimum over full temperature range - rejects interference in single-ended sensing with noisy grounds |
Pinout & Package
ADA4075-2 is available in two RoHS-compliant packages: 8-lead SOIC (standard footprint) and 8-lead 2 mm × 2 mm LFCSP (space-optimized). Both share identical pin numbering and function mapping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUTA) | Amplifier A output | Drives external load; rail-to-rail swing limited by supply and load (e.g., −13.6 V to +13 V @ ±15 V, RL = 2 kΩ) |
| 2 (–INA) | Inverting input of Amp A | Accepts feedback network; clamped to ±1.2 V differential from opposite input to prevent junction breakdown |
| 3 (+INA) | Non-inverting input of Amp A | High-impedance node (500 MΩ common-mode RIN); used for reference or signal injection in buffer/gain configurations |
| 4 (V–) | Negative supply rail | Connects to system ground or negative supply; must be established before input signals to avoid latch-up |
| 5 (+INB) | Non-inverting input of Amp B | Independent of Amp A; enables dual-channel signal processing without crosstalk (channel separation >110 dB @ 1 kHz) |
| 6 (–INB) | Inverting input of Amp B | Functionally identical to Pin 2; supports separate feedback networks for differential or independent gain stages |
| 7 (OUTB) | Amplifier B output | Electrically isolated from OUTA; supports true dual-channel operation (e.g., stereo audio, dual-sensor conditioning) |
| 8 (V+) | Positive supply rail | Must be powered simultaneously with V–; supplies both amplifiers; PSRR >106 dB minimizes supply ripple coupling |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow voltage noise density | 2.8 nV/√Hz at 1 kHz - preserves SNR in mic preamps and strain gauge bridges where source impedance ≤10 kΩ |
| Phase reversal protection | Output clamped to ~2 V from rails when inputs exceed VICM - prevents system lockup in overvoltage transients without external circuitry |
| No input series resistors | Preserves 2.8 nV/√Hz noise floor - avoids thermal noise penalty (e.g., 4 nV/√Hz added by 1 kΩ resistor) common in protected op amps |
| Extended industrial temperature range | −40°C to +125°C operation with guaranteed 1.5 mV max VOS - suitable for automotive cabin sensors and industrial PLC analog I/O |
| Unity-gain stable | Operates stably at AV = 1 with >60° phase margin - eliminates need for external compensation in buffers and followers |
Applications
| Professional Audio Line Driver | Precision Instrumentation Front End |
|---|---|
|
Use Scenario: Driving balanced 600 Ω audio lines from DAC outputs in studio-grade converters. IC Role / Device Role / Timing Role: Dual-channel differential Sallen-Key filter and level shifter; provides differential-to-single-ended conversion and 167 kHz low-pass filtering. Use Value: 0.0002% THD+N and 2.8 nV/√Hz noise ensure transparent signal reproduction; 12 V/µs slew rate handles transient peaks without slew-induced distortion. |
Use Scenario: Amplifying low-level signals from strain gauges, thermopiles, or photodiode transimpedance stages. IC Role / Device Role / Timing Role: Low-noise, low-drift gain stage preceding ADC; configured as inverting amplifier or precision integrator. Use Value: 1 mV max offset and 0.3 µV/°C drift maintain dc accuracy; 110+ dB CMRR rejects EMI in noisy industrial environments. |
| Active Filter Design | Low-Noise Integrator |
|
Use Scenario: Implementing 4th-order low-pass filters in medical EEG/ECG signal chains requiring minimal phase distortion. IC Role / Device Role / Timing Role: Dual op amp configured as cascaded biquad sections; each section uses one ADA4075-2 amplifier. Use Value: 6.5 MHz GBP and 60° phase margin enable stable high-Q filter design up to ~100 kHz; low noise prevents degradation of weak bio-signals. |
Use Scenario: Precision charge integration in radiation detection or capacitive sensing systems. IC Role / Device Role / Timing Role: Op amp in integrator topology with ultra-low bias current (30 nA typ) and low VOS drift (0.3 µV/°C). Use Value: Sub-μV/°C drift minimizes baseline drift over time; 1.8 mA supply current enables battery-powered portable integrators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8672 | Higher offset (125 µV max), higher noise (4.8 nV/√Hz), lower GBW (10 MHz), but lower supply current (2.3 mA) | Better for ultra-low-power precision apps where noise <3 nV/√Hz is not critical; less suitable for audio or fast-settling integrators | Select AD8672 if supply current <2.5 mA is prioritized over noise floor and THD+N performance. |
| OP275 | Higher noise (4.5 nV/√Hz), higher distortion (0.001%), wider supply range (±4 V to ±22 V), but no phase reversal protection | Preferred for legacy industrial systems requiring wide supply tolerance; unsuitable for unattended audio systems due to phase inversion risk | Select OP275 only when ±22 V operation is mandatory and transient overvoltage protection is handled externally. |
Compared with AD8672 and OP275, the ADA4075-2 uniquely combines ultralow noise (2.8 nV/√Hz), industry-leading THD+N (0.0002%), and integrated phase reversal protection-making it the optimal choice for high-fidelity audio and safety-critical precision measurement where signal integrity and fault resilience are non-negotiable.
Availability
ADA4075-2 is available at Aetrix Electronics and suitable for professional audio equipment, precision test instrumentation, medical signal acquisition, and industrial sensor interface applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ADA4075-2 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
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with design centers worldwide.
The ADA4075-2 belongs to Analog Devices' precision op amp product line, engineered specifically for applications demanding ultralow noise, low distortion, and robust operation across extended temperature ranges-targeting professional audio, scientific instrumentation, and high-reliability industrial systems.
FAQ
What is the maximum supply voltage rating for the ADA4075-2?
The ADA4075-2 has an absolute maximum supply voltage rating of ±20 V. Operation beyond this risks permanent damage. The recommended operating range is ±4.5 V to ±18 V, where all specifications-including 6.5 MHz bandwidth and 12 V/µs slew rate-are fully guaranteed across temperature. At ±18 V, output swing reaches −16 V to +15.8 V into 600 Ω loads.
Does the ADA4075-2 require external phase reversal protection?
No. The ADA4075-2 incorporates internal phase reversal protection that clamps the output to approximately 2 V from the supply rails when either input exceeds the common-mode voltage range. This eliminates the need for external diodes or protection circuitry in applications subject to input overvoltage transients, unlike many legacy op amps such as the OP275.
Can the ADA4075-2 drive 600 Ω loads effectively in audio applications?
Yes. The ADA4075-2 delivers ±12.4 V output swing into 600 Ω loads at ±15 V supplies, with THD+N maintained at 0.0002% at 1 kHz. Its 40 mA short-circuit current and low 0.1 Ω closed-loop output impedance ensure stable driving of reactive and low-impedance audio loads without oscillation or distortion degradation.
How does the ADA4075-2 compare to the AD8672 in noise performance?
The ADA4075-2 achieves 2.8 nV/√Hz input voltage noise density at 1 kHz, while the AD8672 specifies 4.8 nV/√Hz under identical conditions. This 1.7× lower noise directly translates to higher signal-to-noise ratio in low-level amplification-critical in microphone preamps and bridge sensor interfaces where source impedances are moderate (≤10 kΩ).
Is the ADA4075-2 unity-gain stable, and what is its phase margin?
Yes, the ADA4075-2 is unity-gain stable with a minimum phase margin of 60° when configured for AV = 1, RL = 1 MΩ, and CL = 35 pF. This stability is maintained across supply voltages (±4.5 V to ±18 V) and temperatures (−40°C to +125°C), enabling reliable use in voltage followers and active filters without external compensation components.
ADA4075-2ARZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- iPolar®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 12V/µs
- Gain Bandwidth Product:
- 6.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 30 nA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 1.8mA (x2 Channels)
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 9 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADA4075-2ARZ FAQ
1.How can I place an order for ADA4075-2ARZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADA4075-2ARZ 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 ADA4075-2ARZ reliable?
The price and inventory of ADA4075-2ARZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADA4075-2ARZ is usually 5 days.
3.What payment methods are accepted for ADA4075-2ARZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADA4075-2ARZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADA4075-2ARZ?
ADA4075-2ARZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADA4075-2ARZ 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 ADA4075-2ARZ?
For technical support, including ADA4075-2ARZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADA4075-2ARZ requirements.
6.How does Aetrix verify that ADA4075-2ARZ is sourced from the original manufacturer or authorized distributors?
All ADA4075-2ARZ 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 ADA4075-2ARZ meets industry standards.
7.What is the process for return or replacement of ADA4075-2ARZ?
All ADA4075-2ARZ units undergo pre-shipment inspection (PSI). If there is an issue with ADA4075-2ARZ, 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 ADA4075-2ARZ part is unused and in its original packaging.
Return procedure for ADA4075-2ARZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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