My Inquiry
My Account
Analog Devices Inc. ADA4084-2ARZ-RL
- Part No.:
- ADA4084-2ARZ-RL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADA4084-2ARZ-RL.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,028
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADA4084-2ARZ-RL from Analog Devices is a dual, 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, and 3.9 nV/√Hz voltage noise density at 1 kHz, with supply current of 0.625 mA per amplifier at ±15 V. It operates across −40°C to +125°C and supports ±1.5 V to ±15 V (or +3 V to +30 V) supplies - ideal for high-side/low-side sensing in battery-powered instrumentation.
For engineers reviewing the ADA4084-2ARZ-RL datasheet, ADA4084-2ARZ-RL pinout, ADA4084-2ARZ-RL application, or ADA4084-2ARZ-RL equivalent, key selection criteria include its rail-to-rail I/O capability, low 100 µV max offset voltage (SOIC), industrial temperature range, and verified performance in ADC input buffers and DAC output amplifiers.
Technical Context
The ADA4084-2ARZ-RL employs a folded-cascode architecture enabling unity-gain stability, 86° phase margin, and 13.9 MHz −3 dB closed-loop bandwidth at ±15 V. Its input stage supports common-mode voltages from V− to V+, and output swings within 10 mV of either rail under 10 kΩ load.
It features matched internal transistor pairs yielding 150 µV typical offset voltage matching between channels and long-term drift of only 3 µV over 10,000 hours. Input protection limits differential voltage to ±0.6 V, requiring external current limiting beyond that threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +3 V to +30 V or ±1.5 V to ±15 V - enables flexible single/dual supply designs without level-shifting. |
| Gain Bandwidth Product | 15.9 MHz typical at AV = 100 - supports stable 10 MHz signal amplification with ≥10× gain. |
| Input Offset Voltage | 100 µV maximum (SOIC package) - ensures ≤0.1% error in 100 mV full-scale precision sensor interfaces. |
| Voltage Noise Density | 3.9 nV/√Hz at 1 kHz - critical for low-level signal integrity in 24-bit ADC front-ends. |
| Slew Rate | 4.6 V/µs typical at ±15 V - sustains clean 10 V p-p signals up to ~750 kHz without distortion. |
| Operating Temperature | −40°C to +125°C - qualified for industrial motor control and automotive under-hood environments. |
| Supply Current per Amp | 0.625 mA typical at ±15 V - allows dual-channel operation below 1.3 mA total, suitable for portable equipment. |
Pinout & Package
ADA4084-2ARZ-RL is supplied in an 8-lead SOIC_N (R-8) package with standard surface-mount footprint and no exposed pad. Pin 1 is OUT A; pins 2–3 are −IN A and +IN A; pin 4 is V−; pins 5–6 are +IN B and −IN B; pin 7 is OUT B; pin 8 is V+.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives loads up to 10 kΩ while maintaining rail-to-rail swing. |
| 2 | −IN A | Inverting input for Channel A - matched to +IN A for <150 µV inter-channel offset. |
| 3 | +IN A | Non-inverting input for Channel A - accepts common-mode voltages from V− to V+. |
| 4 | V− | Negative supply rail - must be connected to system ground or negative rail; powers both amplifiers. |
| 5 | +IN B | Non-inverting input for Channel B - electrically isolated but thermally coupled to Channel A for tracking. |
| 6 | −IN B | Inverting input for Channel B - shares same input bias current spec (140–250 nA) as Channel A. |
| 7 | OUT B | Amplifier B output - independently buffered; no crosstalk above −100 dB at 1 kHz. |
| 8 | V+ | Positive supply rail - supplies both amplifiers; PSRR >110 dB minimizes supply ripple coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full dynamic range utilization in 3 V single-supply systems - e.g., direct interfacing to 0–3 V ADC references. |
| Low 3.9 nV/√Hz voltage noise | Preserves SNR in low-amplitude sensor paths such as piezoelectric accelerometers or strain gauge bridges. |
| 15.9 MHz GBP with unity-gain stability | Permits wideband active filtering (e.g., 2nd-order Sallen-Key) without external compensation components. |
| 100 µV max input offset (SOIC) | Reduces calibration burden in precision current-sense amplifiers where gain errors dominate system accuracy. |
| Industrial temperature range (−40°C to +125°C) | Validates operation in unregulated enclosures like PLC I/O modules or solar inverter monitoring circuits. |
Applications
| Battery-Powered Instrumentation | High-Side and Low-Side Sensing |
|---|---|
Use Scenario: Portable pH meters and handheld multimeters requiring microamp-level input bias and low power consumption. IC Role / Device Role / Timing Role: Precision DC-coupled amplifier for transducer signal conditioning and ADC driver. Use Value: 0.625 mA per amplifier enables >100-hour battery life on two AA cells while maintaining 16-bit effective resolution. |
Use Scenario: Real-time current monitoring in 12 V/48 V DC power rails for EV battery management systems. IC Role / Device Role / Timing Role: Dual-channel difference amplifier for shunt-based measurement with independent high- and low-side referencing. Use Value: Rail-to-rail input allows accurate sensing at 0 V (low-side) and near VBUS (high-side) without external level shifters. |
| Power Supply Control and Protection | Analog-to-Digital Converter (ADC) Input Buffers |
Use Scenario: Overvoltage/overcurrent trip circuitry in programmable lab power supplies with fast transient response. IC Role / Device Role / Timing Role: Comparator replacement with hysteresis-capable op-amp configuration for precise threshold detection. Use Value: 4.6 V/µs slew rate ensures <1 µs response to 10 V step inputs, meeting Class II safety timing requirements. |
Use Scenario: Anti-aliasing and drive stage preceding 1 MSPS SAR ADCs in data acquisition systems. IC Role / Device Role / Timing Role: Unity-gain buffer isolating ADC sample capacitor from source impedance. Use Value: 0.1 Ω closed-loop output impedance prevents settling errors during 100 ns acquisition windows. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual low-noise op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8676ARZ | Lower 2.8 nV/√Hz noise, higher 3.5 mA supply current, ±15 V only, no rail-to-rail input. | Better for ultra-low-noise audio preamps; unsuitable for 3 V single-supply or rail-to-rail input designs. | Select AD8676ARZ only when noise dominates over power and supply flexibility. |
| OP27GSZ-REEL7 | Higher 3.2 nV/√Hz noise, 10x higher supply current (1.8 mA), ±15 V only, no rail-to-rail output. | Preferred for legacy high-speed test equipment where bandwidth >10 MHz and DC precision are balanced. | Choose OP27GSZ-REEL7 only if existing PCB layout mandates identical pinout and legacy qualification is required. |
Compared with AD8676ARZ and OP27GSZ-REEL7, ADA4084-2ARZ-RL uniquely combines rail-to-rail I/O, sub-4 nV/√Hz noise, and <0.65 mA supply current - making it the only option supporting 3 V battery operation while preserving 16-bit ADC interface fidelity.
Availability
ADA4084-2ARZ-RL is available at Aetrix Electronics and suitable for battery-powered instrumentation, high-side/low-side current sensing, and precision ADC/DAC interface applications requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for ADA4084-2ARZ-RL 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 R&D and manufacturing facilities worldwide.
The ADA4084 family was designed specifically for precision, low-noise, wide-supply-range signal conditioning in industrial, instrumentation, and medical applications - emphasizing rail-to-rail operation, long-term stability, and robust ESD tolerance (4.5 kV HBM).
FAQ
What supply voltage range does the ADA4084-2ARZ-RL support?
The ADA4084-2ARZ-RL operates from +3 V to +30 V (single supply) or ±1.5 V to ±15 V (dual supply). This wide range enables direct use in 3.3 V microcontroller systems and traditional ±15 V test equipment without external regulators. Absolute maximum supply is ±18 V, and all specifications in the datasheet are guaranteed across the full industrial temperature range of −40°C to +125°C for ADA4084-2ARZ-RL.
Is the ADA4084-2ARZ-RL pin-compatible with other dual op amps in SOIC-8 packages?
No - the ADA4084-2ARZ-RL uses a nonstandard SOIC-8 pinout: OUT A (pin 1), −IN A (pin 2), +IN A (pin 3), V− (pin 4), +IN B (pin 5), −IN B (pin 6), OUT B (pin 7), V+ (pin 8). It is not pin-compatible with industry-standard dual op amps like LM358 or AD8676, which place V+ at pin 8 and V− at pin 4 but assign different functions to pins 1–3 and 5–7. Layout redesign is required for substitution.
Does the ADA4084-2ARZ-RL require external compensation for unity-gain stability?
No - the ADA4084-2ARZ-RL is internally compensated and unity-gain stable across its full operating range. Its phase margin is specified at 85°–86°, and it achieves 13.9 MHz −3 dB closed-loop bandwidth at AV = 1 with no external components. This eliminates the need for feedback capacitors or gain-setting resistors in buffer configurations, simplifying design for ADC input drivers and DAC output stages using ADA4084-2ARZ-RL.
What is the maximum input differential voltage allowed for the ADA4084-2ARZ-RL?
The absolute maximum differential input voltage for ADA4084-2ARZ-RL is ±0.6 V. Exceeding this risks permanent damage unless input current is actively limited to <5 mA via external series resistors. This specification applies regardless of common-mode voltage or supply condition. The device's rail-to-rail input stage allows full V− to V+ common-mode range, but differential stress must remain within ±0.6 V - a key constraint in comparator or overvoltage protection configurations using ADA4084-2ARZ-RL.
How does the ADA4084-2ARZ-RL perform in low-power, battery-operated systems?
The ADA4084-2ARZ-RL draws only 0.625 mA per amplifier at ±15 V (0.565 mA typical at +3 V), enabling dual-channel operation below 1.3 mA total. Combined with rail-to-rail I/O and 100 µV max offset, it maintains 16-bit-equivalent accuracy in 3 V systems - e.g., delivering <0.01% gain error in a 100 mV full-scale current-sense amplifier. Its −40°C to +125°C rating further ensures reliability in unheated portable enclosures, confirming ADA4084-2ARZ-RL as a fit for long-life battery instrumentation.
ADA4084-2ARZ-RL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- 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:
- 30 µV
- Current - Supply:
- 625µA (x2 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:
- 8-SOIC
ADA4084-2ARZ-RL FAQ
1.How can I place an order for ADA4084-2ARZ-RL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADA4084-2ARZ-RL 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 ADA4084-2ARZ-RL reliable?
The price and inventory of ADA4084-2ARZ-RL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADA4084-2ARZ-RL is usually 5 days.
3.What payment methods are accepted for ADA4084-2ARZ-RL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADA4084-2ARZ-RL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADA4084-2ARZ-RL?
ADA4084-2ARZ-RL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADA4084-2ARZ-RL 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 ADA4084-2ARZ-RL?
For technical support, including ADA4084-2ARZ-RL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADA4084-2ARZ-RL requirements.
6.How does Aetrix verify that ADA4084-2ARZ-RL is sourced from the original manufacturer or authorized distributors?
All ADA4084-2ARZ-RL 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 ADA4084-2ARZ-RL meets industry standards.
7.What is the process for return or replacement of ADA4084-2ARZ-RL?
All ADA4084-2ARZ-RL units undergo pre-shipment inspection (PSI). If there is an issue with ADA4084-2ARZ-RL, 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 ADA4084-2ARZ-RL part is unused and in its original packaging.
Return procedure for ADA4084-2ARZ-RL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADA4084-2ARZ-RL Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
