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Analog Devices Inc. ADA4084-4ARUZ
- Part No.:
- ADA4084-4ARUZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADA4084-4ARUZ.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:872
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Product details
Overview
ADA4084-4ARUZ from Analog Devices is a quad, rail-to-rail input/output, low-noise operational amplifier optimized for precision analog signal conditioning in single- and dual-supply systems. It delivers 15.9 MHz gain bandwidth, 4.6 V/µs slew rate at ±15 V, 3.9 nV/√Hz voltage noise at 1 kHz, 100 µV max offset voltage (SOIC), and operates across −40°C to +125°C. It is used in high-side/low-side current sensing and ADC input buffering where wide dynamic range and dc accuracy are critical.
For engineers reviewing the ADA4084-4ARUZ datasheet, ADA4084-4ARUZ pinout, ADA4084-4ARUZ application, or ADA4084-4ARUZ equivalent, key selection criteria include rail-to-rail I/O swing with ±15 V supply capability, low 0.625 mA per amplifier quiescent current, guaranteed unity-gain stability, and TSSOP-14 package compatibility with space-constrained industrial sensor interfaces.
Technical Context
The ADA4084-4ARUZ implements a folded-cascode input stage with rail-to-rail common-mode input range extending from V− to V+, enabling full-scale signal capture in single-supply configurations. Its output stage supports rail-to-rail swing within 20 mV of either rail under 10 kΩ load at ±15 V.
It features internal compensation for unity-gain stability, exhibits 86° phase margin, and maintains ≤0.003% THD+N at 1 kHz with 5 Vrms output into 2 kΩ - confirming suitability for precision amplification ahead of high-resolution ADCs or DACs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +3 V to +30 V (or ±1.5 V to ±15 V) - supports wide-input industrial power rails and battery-backed systems. |
| Gain Bandwidth Product | 15.9 MHz typical at ±15 V - enables stable closed-loop operation up to ~14 MHz at unity gain for anti-aliasing filters. |
| Input Offset Voltage | 100 µV maximum (SOIC package, TA = 25°C) - ensures <0.001% error in 10 V full-scale measurement paths. |
| Voltage Noise Density | 3.9 nV/√Hz at 1 kHz - preserves SNR in low-level sensor signal chains (e.g., strain gauges, thermopiles). |
| Slew Rate | 4.6 V/µs typical at ±15 V - supports 10 Vpp signals up to ~700 kHz without distortion. |
| Quiescent Current | 0.625 mA per amplifier at ±15 V - allows four-channel operation at <2.5 mA total, ideal for portable instrumentation. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive, motor control, and industrial PLC environments. |
Pinout & Package
ADA4084-4ARUZ is packaged in a 14-lead TSSOP (RU-14) with exposed pad (not electrically connected). The package footprint is compatible with standard surface-mount reflow profiles and offers θJA = 112°C/W on a 4-layer JEDEC board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives external load or next-stage input; rail-to-rail swing supports full dynamic range utilization. |
| 2 | −IN A | Inverting input for Channel A - accepts feedback network for configured gain; high CMRR (>106 dB) rejects supply noise. |
| 3 | +IN A | Non-inverting input for Channel A - connects to sensor or reference; rail-to-rail input allows direct interface with 0–3.3 V or 0–5 V sources. |
| 4 | V+ | Positive supply terminal - accepts up to +30 V or +15 V; PSRR >110 dB suppresses supply ripple from switching regulators. |
| 5 | +IN B | Non-inverting input for Channel B - enables independent signal path for differential pair or multi-sensor acquisition. |
| 6 | −IN B | Inverting input for Channel B - supports matched gain configuration with Channel A for common-mode rejection. |
| 7 | OUT B | Amplifier B output - identical performance to OUT A; allows dual-channel simultaneous sampling. |
| 8 | OUT C | Amplifier C output - provides third independent channel; eliminates need for multiple discrete op-amps in compact designs. |
| 9 | −IN C | Inverting input for Channel C - supports cascaded filtering or programmable gain stages without layout duplication. |
| 10 | +IN C | Non-inverting input for Channel C - enables synchronous biasing of three transducer elements (e.g., 3-phase current sensing). |
| 11 | V− | Negative supply terminal - accepts down to −15 V or ground; enables true bipolar operation or single-supply referenced design. |
| 12 | +IN D | Non-inverting input for Channel D - completes quad functionality for 4-channel data acquisition or redundancy schemes. |
| 13 | −IN D | Inverting input for Channel D - matches input structure of other channels for consistent PCB routing and layout symmetry. |
| 14 | OUT D | Amplifier D output - delivers fourth independent buffered output; supports isolated monitoring of auxiliary system parameters. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full utilization of supply rails in single-supply systems (e.g., 3.3 V microcontroller interfaces) without level-shifting circuitry. |
| Low 3.9 nV/√Hz voltage noise | Preserves signal integrity in front-end amplification of low-output sensors (e.g., piezoelectric accelerometers, RTDs). |
| Unity-gain stable | Eliminates need for external compensation components in buffer, follower, or gain-of-one configurations - reduces BOM count and layout area. |
| 100 µV max input offset (SOIC) | Minimizes dc error in precision current sensing (e.g., 10 mΩ shunt at 10 A yields only 1 mV offset-induced error). |
| −40°C to +125°C operating range | Supports deployment in harsh environments including motor drives, solar inverters, and automotive body control modules. |
Applications
| Battery-Powered Instrumentation | High-Side and Low-Side Sensing |
|---|---|
|
Use Scenario: Portable multimeter measuring 0–10 V dc with 16-bit SAR ADC. IC Role / Device Role / Timing Role: ADC input buffer providing impedance transformation, rail-to-rail drive capability, and low-noise signal conditioning. Use Value: 3.9 nV/√Hz noise and 100 µV offset ensure <±0.01% measurement accuracy over temperature without calibration. |
Use Scenario: Real-time monitoring of 48 V battery pack cell voltages in EV BMS. IC Role / Device Role / Timing Role: High-side current sense amplifier with bidirectional capability using dual-supply configuration (±15 V). Use Value: Rail-to-rail input captures full 0–48 V common-mode range; 15.9 MHz GBW supports fast transient detection during fault events. |
| Power Supply Control and Protection | Analog-to-Digital Converter Input Buffers |
|
Use Scenario: Overvoltage/overcurrent protection loop in programmable lab power supply. IC Role / Device Role / Timing Role: Error amplifier comparing sensed output against reference; drives pass transistor gate via external driver. Use Value: 4.6 V/µs slew rate ensures <1 µs response to 10 V step errors; 0.625 mA per amp minimizes thermal drift in closed-loop stability. |
Use Scenario: Driving AD7606 16-bit simultaneous-sampling ADC inputs in industrial DAQ system. IC Role / Device Role / Timing Role: Quad-channel input buffer isolating multiplexed sensor signals before digitization. Use Value: Four matched amplifiers in one TSSOP-14 reduce board area by 75% vs. discrete SOIC solutions while maintaining channel-to-channel matching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADA4084-4ACPZ-R7 | Same die, 16-lead LFCSP package with exposed pad tied to V−; lower θJA (55°C/W) for higher power density layouts. | Better thermal performance in compact, high-ambient-temperature enclosures (e.g., enclosed motor drives); requires different land pattern and solder stencil. | Select when thermal management is critical and PCB rework supports LFCSP assembly. |
| OP4177ARUZ | Lower noise (2.8 nV/√Hz), higher offset (150 µV max), slower GBW (1.3 MHz), higher supply current (0.75 mA/amplifier). | Better for ultra-low-noise dc-coupled applications (e.g., weigh scales) but unsuitable for >1 MHz signal paths or low-power battery use. | Select only when sub-3 nV/√Hz noise dominates over bandwidth and quiescent power requirements. |
Compared with ADA4084-4ARUZ, the LFCSP variant offers superior thermal dissipation in space-constrained designs, while OP4177ARUZ trades bandwidth and power efficiency for marginal noise reduction - making ADA4084-4ARUZ the optimal balance for high-speed, low-power, precision industrial signal chains.
Availability
ADA4084-4ARUZ is available at Aetrix Electronics and suitable for battery-powered instrumentation, high-side/low-side current sensing, and analog-to-digital converter input buffering requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADA4084-4ARUZ 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.
The ADA4084 family was designed specifically for precision, low-noise, rail-to-rail op amp applications in industrial, instrumentation, and medical systems demanding wide supply range, high accuracy, and robust temperature operation.
FAQ
What supply voltage range does the ADA4084-4ARUZ support?
The ADA4084-4ARUZ operates from +3 V to +30 V single supply or ±1.5 V to ±15 V dual supply. This wide range enables direct interfacing with legacy industrial rails (±15 V), modern low-voltage microcontrollers (3.3 V), and high-voltage battery monitoring systems (24 V–48 V), all without external level-shifting circuitry. The ADA4084-4ARUZ maintains specified performance across this full range.
Is the ADA4084-4ARUZ unity-gain stable?
Yes, the ADA4084-4ARUZ is internally compensated for unity-gain stability. It achieves 86° phase margin at AV = 1 with 10 kΩ load, eliminating the need for external compensation networks in buffer, follower, or gain-of-one configurations. This simplifies design and improves reliability in ADC input buffering and signal isolation applications using the ADA4084-4ARUZ.
What is the maximum input offset voltage specification for ADA4084-4ARUZ?
The maximum input offset voltage for ADA4084-4ARUZ is 100 µV at TA = 25°C in the SOIC package (the package type for ARUZ suffix). Over the full −40°C to +125°C industrial temperature range, it is guaranteed ≤200 µV. This tight dc specification ensures minimal gain error in precision current sensing and bridge amplifier applications using the ADA4084-4ARUZ.
Does ADA4084-4ARUZ support rail-to-rail input and output?
Yes, ADA4084-4ARUZ supports true rail-to-rail input (V− to V+) and rail-to-rail output (within 20 mV of either rail at 10 kΩ load). This allows full-scale signal capture in single-supply systems (e.g., 0–3.3 V sensor outputs) and maximizes dynamic range when driving successive stages like ADCs or comparators - a core capability confirmed across all operating conditions for the ADA4084-4ARUZ.
What package type is used for ADA4084-4ARUZ?
ADA4084-4ARUZ uses a 14-lead TSSOP (Thin Shrink Small Outline Package), designated RU-14 in Analog Devices' ordering guide. It features a standard 0.65 mm lead pitch, exposed thermal pad (non-connected), and JEDEC-compliant footprint. This package balances miniaturization, thermal performance (θJA = 112°C/W), and manufacturability for high-volume industrial PCB assembly using the ADA4084-4ARUZ.
ADA4084-4ARUZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 4.6V/µs
- Gain Bandwidth Product:
- 15.9 MHz
- -3db Bandwidth:
- 13.9 MHz
- Current - Input Bias:
- 140 nA
- Voltage - Input Offset:
- 60 µV
- Current - Supply:
- 625µA (x4 Channels)
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
ADA4084-4ARUZ FAQ
1.How can I place an order for ADA4084-4ARUZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADA4084-4ARUZ 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 ADA4084-4ARUZ reliable?
The price and inventory of ADA4084-4ARUZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADA4084-4ARUZ is usually 5 days.
3.What payment methods are accepted for ADA4084-4ARUZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADA4084-4ARUZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADA4084-4ARUZ?
ADA4084-4ARUZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADA4084-4ARUZ 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 ADA4084-4ARUZ?
For technical support, including ADA4084-4ARUZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADA4084-4ARUZ requirements.
6.How does Aetrix verify that ADA4084-4ARUZ is sourced from the original manufacturer or authorized distributors?
All ADA4084-4ARUZ 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 ADA4084-4ARUZ meets industry standards.
7.What is the process for return or replacement of ADA4084-4ARUZ?
All ADA4084-4ARUZ units undergo pre-shipment inspection (PSI). If there is an issue with ADA4084-4ARUZ, 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 ADA4084-4ARUZ part is unused and in its original packaging.
Return procedure for ADA4084-4ARUZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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