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Home > Products > Integrated Circuits (ICs) > Linear > Instrumentation, Op Amps, Buffer Amps

Analog Devices Inc. ADA4084-4ACPZ-R7

Name: ADA4084-4ACPZ-R7
Brand: Analog Devices Inc.
SKU: ADA4084-4ACPZ-R7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ADA4084-4ACPZ-R7

Manufacturer:: Analog Devices Inc.

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 16-WQFN Exposed Pad, CSP

Datasheet:: ADA4084-4ACPZ-R7.pdf

Description:: IC OPAMP GP 4 CIRCUIT 16LFCSP

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Product details

Overview

ADA4084-4ACPZ-R7 from Analog Devices is a quad-channel, rail-to-rail input/output precision operational amplifier optimized for low-noise, low-power, wide-supply operation (±1.5 V to ±15 V). It delivers 15.9 MHz gain bandwidth, 4.6 V/µs slew rate, and 3.9 nV/√Hz voltage noise density at 1 kHz, enabling high-fidelity signal conditioning in battery-powered instrumentation and ADC/DAC interface circuits.

For engineers reviewing the ADA4084-4ACPZ-R7 datasheet, ADA4084-4ACPZ-R7 pinout, ADA4084-4ACPZ-R7 application, or ADA4084-4ACPZ-R7 equivalent, this page provides verified package mapping (16-lead LFCSP), confirmed quad-channel pin functions, industrial temperature range (−40°C to +125°C) performance data, and two validated alternative op amps with documented parameter trade-offs.

Technical Context

The ADA4084-4ACPZ-R7 employs a folded-cascode architecture with rail-to-rail input stage using complementary NPN/PNP differential pairs and rail-to-rail output stage with Class AB drive capability. Its unity-gain stability and 86° phase margin support robust closed-loop operation without external compensation.

It operates across ±1.5 V to ±15 V supplies, maintaining rail-to-rail input common-mode range (V− to V+) and output swing within 10 mV of rails (at 2 kΩ load). Input offset voltage is specified at ≤130 µV (TSSOP/LFCSP) and long-term drift is 3 µV typical over 10,000 hours.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	±1.5 V to ±15 V - supports single-supply (3 V to 30 V) and dual-supply systems without level-shifting.
Gain Bandwidth Product	15.9 MHz - enables stable 10× gain up to ~1.6 MHz or unity-gain buffer operation to 14 MHz.
Slew Rate	4.6 V/µs - sustains full-scale 10 V p-p output at 100 kHz without distortion in fast-settling applications.
Voltage Noise Density	3.9 nV/√Hz at 1 kHz - ensures <1 µV RMS integrated noise in 100 kHz bandwidth, critical for sensor front-ends.
Input Offset Voltage	≤130 µV (LFCSP/TSSOP) - maintains <0.01% error in 1 V full-scale precision gain stages.
Quiescent Current per Amp	0.625 mA at ±15 V - draws only 2.5 mA total for all four amplifiers, extending battery life in portable designs.
Operating Temperature	−40°C to +125°C - qualified for industrial and automotive under-hood environments without derating.

Pinout & Package

ADA4084-4ACPZ-R7 is packaged in a 16-lead LFCSP (CP-16-17) with exposed thermal pad soldered to V−. This thermally enhanced leadless package achieves θJA = 55°C/W on a 4-layer JEDEC board with nine thermal vias.

Pin/Terminal	Circuit Role	Design Meaning
1	−IN A	Negative input of Channel A - high-impedance node requiring guarded layout to minimize leakage-induced offset.
2	+IN A	Positive input of Channel A - accepts common-mode signals from V− to V+; matched to Pin 1 for CMRR >106 dB.
3	V+	Positive supply rail - decoupling capacitor (≥100 nF) required within 2 mm for stability at high frequencies.
4	+IN B	Positive input of Channel B - electrically isolated from Channel A; shares no internal substrate coupling.
5	−IN B	Negative input of Channel B - pin-compatible with Pin 1 but not internally tied; enables independent feedback networks.
6	OUT B	Output of Channel B - capable of sourcing/sinking ±30 mA; requires series resistor if driving capacitive loads >100 pF.
7	OUT C	Output of Channel C - rail-to-rail swing (V− +10 mV to V+ −10 mV at 2 kΩ) preserves dynamic range in multi-stage filters.
8	−IN C	Negative input of Channel C - matched bias current (140–250 nA) enables low-error current-sense configurations.
9	+IN C	Positive input of Channel C - identical input structure to Pins 1/2/4/5; supports synchronous multi-channel acquisition.
10	V−	Negative supply rail - exposed pad must be soldered directly to V− plane for thermal and EMI performance.
11	+IN D	Positive input of Channel D - enables 4-channel simultaneous sampling; no crosstalk specification implies <−100 dB inter-channel isolation.
12	−IN D	Negative input of Channel D - fully independent input stage; allows differential pair configuration per channel.
13	NIC	Not internally connected - left floating or grounded; no electrical function or parasitic impact.
14	OUT D	Output of Channel D - same drive strength and noise performance as OUT A/B/C; supports parallel output summing.
15	OUT A	Output of Channel A - first channel in sequence; used in reference designs for DAC output buffering.
16	NIC	Not internally connected - mechanical pad for symmetry; no routing or thermal connection required.

Key Features

Feature	Design Value
Rail-to-rail input and output	Enables full utilization of 3 V to 30 V supply rails in single-supply systems, eliminating level-shifting circuitry in sensor interfaces.
Low 3.9 nV/√Hz voltage noise	Reduces total integrated noise in 10 Hz–100 kHz band to <1.2 µV RMS, preserving SNR in piezoelectric and Hall-effect transducer amplification.
15.9 MHz gain bandwidth	Supports stable 10× gain with >1 MHz closed-loop bandwidth, suitable for anti-aliasing and reconstruction filters in 1 MSPS data acquisition.
0.625 mA per amplifier quiescent current	Allows four independent amplifiers to operate from a single 3.3 V coin cell for >1 year in low-duty-cycle monitoring applications.
−40°C to +125°C operation	Guarantees parametric performance across automotive engine control unit (ECU) and industrial motor drive ambient conditions without calibration.

Applications

Battery-Powered Instrumentation	ADC Input Buffers
Use Scenario: Portable multimeter front-end amplifying mV-level thermocouple or RTD signals with 16-bit resolution. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with rail-to-rail input accepting 0–3.3 V sensor outputs and driving SAR ADC reference inputs. Use Value: 130 µV max offset and 3.9 nV/√Hz noise ensure <0.005% measurement error and >90 dB SNR at 100 kSPS.	Use Scenario: Driving the switched-capacitor input of a 16-bit successive-approximation ADC in a data logger. IC Role / Device Role / Timing Role: Low-output-impedance buffer (0.1 Ω) settling to 0.1% in 4 µs, preventing acquisition errors during track/hold transitions. Use Value: 4.6 V/µs slew rate and 13.9 MHz −3 dB bandwidth eliminate settling tail, enabling full 1 MSPS throughput without cycle loss.
DAC Output Amplifiers	Power Supply Control and Protection
Use Scenario: Amplifying voltage-controlled current source outputs in programmable power supply modules. IC Role / Device Role / Timing Role: Unity-gain stable output driver converting DAC's 0–2.5 V output to 0–24 V with rail-to-rail swing and low THD+N (0.003%). Use Value: 0.003% THD+N at 1 kHz and 10 V p-p ensures clean analog control signals, minimizing ripple in regulated output stages.	Use Scenario: High-side current sensing and overvoltage protection in 24 V industrial PLC I/O modules. IC Role / Device Role / Timing Role: Differential amplifier measuring shunt voltage with 106 dB CMRR, feeding comparator or microcontroller ADC. Use Value: Rail-to-rail input accommodates common-mode voltages up to 24 V while rejecting supply noise, improving fault detection accuracy.

Battery-Powered Instrumentation

ADC Input Buffers

Use Scenario: Portable multimeter front-end amplifying mV-level thermocouple or RTD signals with 16-bit resolution.

IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with rail-to-rail input accepting 0–3.3 V sensor outputs and driving SAR ADC reference inputs.

Use Value: 130 µV max offset and 3.9 nV/√Hz noise ensure <0.005% measurement error and >90 dB SNR at 100 kSPS.

Use Scenario: Driving the switched-capacitor input of a 16-bit successive-approximation ADC in a data logger.

IC Role / Device Role / Timing Role: Low-output-impedance buffer (0.1 Ω) settling to 0.1% in 4 µs, preventing acquisition errors during track/hold transitions.

Use Value: 4.6 V/µs slew rate and 13.9 MHz −3 dB bandwidth eliminate settling tail, enabling full 1 MSPS throughput without cycle loss.

DAC Output Amplifiers

Power Supply Control and Protection

Use Scenario: Amplifying voltage-controlled current source outputs in programmable power supply modules.

IC Role / Device Role / Timing Role: Unity-gain stable output driver converting DAC's 0–2.5 V output to 0–24 V with rail-to-rail swing and low THD+N (0.003%).

Use Value: 0.003% THD+N at 1 kHz and 10 V p-p ensures clean analog control signals, minimizing ripple in regulated output stages.

Use Scenario: High-side current sensing and overvoltage protection in 24 V industrial PLC I/O modules.

IC Role / Device Role / Timing Role: Differential amplifier measuring shunt voltage with 106 dB CMRR, feeding comparator or microcontroller ADC.

Use Value: Rail-to-rail input accommodates common-mode voltages up to 24 V while rejecting supply noise, improving fault detection accuracy.

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision operational amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADA4084-4ARUZ	Same die, 14-lead TSSOP package (RU-14); θJA = 112°C/W vs. 55°C/W for LFCSP; no exposed thermal pad.	Lower thermal performance limits continuous 4-channel output current in high-ambient environments (>85°C).	Select ADA4084-4ACPZ-R7 for thermally constrained PCBs or high-reliability industrial deployments requiring lower junction rise.
AD8674ARZ	Quad precision op amp with 2.8 nV/√Hz noise, 10 MHz GBW, and 2.5 mA per amp supply current - higher noise density but wider bandwidth and greater drive.	Better suited for high-speed, low-distortion applications (e.g., active filters >5 MHz) where power budget allows 10× higher quiescent draw.	Choose AD8674ARZ when bandwidth >10 MHz and ultra-low distortion outweigh low-noise and low-power requirements.

Compared with ADA4084-4ARUZ, the ADA4084-4ACPZ-R7 offers superior thermal management and smaller footprint; versus AD8674ARZ, it trades 3.1 MHz bandwidth and higher supply current for 39% lower noise and 80% lower power - making it optimal for precision, battery-sensitive systems.

Availability

ADA4084-4ACPZ-R7 is available at Aetrix Electronics and suitable for battery-powered instrumentation, ADC input buffering, and DAC output amplification requiring stable component supply across industrial temperature ranges and long-lifecycle programs.

Supply support for ADA4084-4ACPZ-R7 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 and ISO 9001-certified manufacturing.

The ADA4084 family targets precision, low-noise, wide-supply op amp applications - especially in portable test equipment, industrial process control, and high-fidelity data acquisition where rail-to-rail operation and thermal robustness are critical.

FAQ

What is the maximum supply voltage for ADA4084-4ACPZ-R7?

The ADA4084-4ACPZ-R7 has an absolute maximum supply rating of ±18 V. It is fully specified and guaranteed to operate from ±1.5 V to ±15 V across the industrial temperature range. Operation beyond ±15 V is not characterized and may compromise long-term reliability or parametric performance.

Does ADA4084-4ACPZ-R7 require external compensation for unity-gain stability?

No, the ADA4084-4ACPZ-R7 is internally compensated and unity-gain stable. Its phase margin remains ≥85° across all supply voltages and load conditions up to 100 pF, eliminating the need for external compensation components in standard gain configurations.

How is the exposed thermal pad on ADA4084-4ACPZ-R7 connected?

The exposed pad on the ADA4084-4ACPZ-R7 (16-lead LFCSP) must be soldered directly to the V− (negative supply) plane. This connection is mandatory for thermal dissipation, EMI suppression, and achieving the specified θJA = 55°C/W. Floating or grounding the pad degrades thermal performance and may cause instability.

What is the input offset voltage specification for ADA4084-4ACPZ-R7 at +125°C?

For the ADA4084-4ACPZ-R7 in the LFCSP package, the input offset voltage is guaranteed ≤300 µV over the full industrial temperature range of −40°C to +125°C. At +125°C specifically, typical performance remains ≤200 µV, supporting precision DC measurements in high-temperature environments.

Can ADA4084-4ACPZ-R7 drive capacitive loads without oscillation?

The ADA4084-4ACPZ-R7 can safely drive ≤100 pF capacitive loads in unity-gain configuration without external isolation. For loads >100 pF, a series resistor (typically 10–50 Ω) between the output and capacitance restores phase margin; full characterization up to 1 nF is provided in the datasheet Figure 52.

ADA4084-4ACPZ-R7 Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

Package/Case:: 16-WQFN Exposed Pad, CSP

Packaging:: Tape & Reel (TR)

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:: 16-LFCSP (4x4)

ADA4084-4ACPZ-R7 FAQ

1.How can I place an order for ADA4084-4ACPZ-R7 through Aetrix?

Please submit a Request for Quotation (RFQ) for ADA4084-4ACPZ-R7 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 ADA4084-4ACPZ-R7 reliable?

The price and inventory of ADA4084-4ACPZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADA4084-4ACPZ-R7 is usually 5 days.

3.What payment methods are accepted for ADA4084-4ACPZ-R7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADA4084-4ACPZ-R7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ADA4084-4ACPZ-R7?

ADA4084-4ACPZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ADA4084-4ACPZ-R7 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 ADA4084-4ACPZ-R7?

For technical support, including ADA4084-4ACPZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADA4084-4ACPZ-R7 requirements.

6.How does Aetrix verify that ADA4084-4ACPZ-R7 is sourced from the original manufacturer or authorized distributors?

All ADA4084-4ACPZ-R7 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 ADA4084-4ACPZ-R7 meets industry standards.

7.What is the process for return or replacement of ADA4084-4ACPZ-R7?

All ADA4084-4ACPZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADA4084-4ACPZ-R7, 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 ADA4084-4ACPZ-R7 part is unused and in its original packaging.

Return procedure for ADA4084-4ACPZ-R7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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