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Analog Devices Inc. AD8674ARUZ
- Part No.:
- AD8674ARUZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD8674ARUZ.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,035
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Product details
Overview
AD8674ARUZ from Analog Devices is a precision quad operational amplifier optimized for low-noise, high-accuracy signal conditioning in instrumentation and sensor interfaces. It delivers 2.8 nV/√Hz voltage noise, 10 MHz gain bandwidth, 75 µV max offset voltage, 12 nA max input bias current, and operates from ±5 V to ±15 V supplies. It is used in GPS receiver filters and professional audio preamplifiers where ultralow noise and DC precision are critical.
For engineers reviewing the AD8674ARUZ datasheet, AD8674ARUZ pinout, AD8674ARUZ application, or AD8674ARUZ equivalent, this page provides verified specifications, package details, real-world use cases, and validated alternative options for design-in and supply chain continuity.
Technical Context
The AD8674ARUZ employs a bipolar input stage to achieve ultralow voltage noise and high open-loop gain (120 dB min), enabling precise DC-coupled amplification with minimal drift. Its unity-gain stability and no phase reversal behavior support robust operation in feedback networks driving capacitive loads up to 1000 pF.
Specified over –40°C to +85°C, it features matched channel performance (–130 dB channel separation at 1 kHz) and rail-to-rail output swing capability under 2 kΩ load, making it suitable for multi-channel precision analog front-ends requiring consistent gain and noise performance across all four amplifiers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage Noise Density | 2.8 nV/√Hz at 1 kHz - enables high-fidelity signal amplification in low-source-impedance sensor paths without degrading SNR |
| Gain Bandwidth Product | 10 MHz - supports stable closed-loop operation up to 10× gain with <5.1 µs settling to 0.01% for 4 V step |
| Input Offset Voltage | 75 µV max at 25°C - ensures <0.0075% error in 1 V full-scale measurement systems |
| Input Bias Current | 12 nA max at 25°C - minimizes voltage error across high-impedance source networks (e.g., photodiode transimpedance) |
| Supply Range | ±5 V to ±15 V - allows direct compatibility with legacy industrial and test equipment rails |
| Channel Separation | –130 dB at 1 kHz - prevents crosstalk-induced distortion in multi-channel data acquisition |
| Output Drive | ±20 mA at ±15 V - sustains linear operation into 600 Ω loads, supporting active filter and driver stages |
Pinout & Package
AD8674ARUZ is packaged in a 14-lead TSSOP (RU-14) with exposed pad for thermal enhancement. Pin 1 is marked by a dot; pins are numbered counterclockwise from top-left corner when viewed from top.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives external load or feedback network; capable of ±20 mA sink/source |
| 2 | –IN A | Inverting input of Amp A - high-impedance node (15 MΩ differential, 3.5 GΩ common-mode) |
| 3 | +IN A | Non-inverting input of Amp A - matched to –IN A for optimal CMRR and offset rejection |
| 4 | V+ | Positive supply rail - connects to +VS; decoupling capacitor required within 1 cm |
| 5 | +IN B | Non-inverting input of Amp B - electrically isolated but thermally coupled to other inputs for tracking |
| 6 | –IN B | Inverting input of Amp B - shares same input structure and biasing as Amp A |
| 7 | OUT B | Amplifier B output - independent output stage; no internal coupling to OUT A |
| 8 | OUT D | Amplifier D output - fourth channel; identical AC/DC specs to OUT A/B/C |
| 9 | –IN D | Inverting input of Amp D - part of fully independent quad amplifier core |
| 10 | +IN D | Non-inverting input of Amp D - matched pair with –IN D for precision differential gain |
| 11 | V– | Negative supply rail - connects to –VS; must be referenced to system ground via low-inductance path |
| 12 | +IN C | Non-inverting input of Amp C - third channel input; layout symmetry recommended for thermal matching |
| 13 | –IN C | Inverting input of Amp C - shares same input stage architecture and noise profile as other channels |
| 14 | OUT C | Amplifier C output - completes quad configuration; supports individual gain-setting per channel |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Operates safely with inputs driven 1 V beyond either supply rail - eliminates latch-up risk in overvoltage transient conditions |
| Capacitive load drive | Stable with >1000 pF loads - enables direct connection to ADC input filters or long PCB traces without external compensation |
| Low 1/f noise | 77 nV p-p (0.1 Hz to 10 Hz) - critical for DC-coupled strain gauge, thermopile, and precision weight scale applications |
| High PSRR | 106 dB min (±4 V to ±18 V) - rejects power supply ripple in mixed-signal systems sharing noisy digital rails |
| Matched channel specs | –130 dB channel separation at 1 kHz - preserves signal integrity in simultaneous sampling multi-channel instrumentation |
Applications
| GPS Receiver Front-End | Medical Instrumentation Amplifier |
|---|---|
|
Use Scenario: Signal conditioning in L1-band GPS receiver analog baseband, filtering and amplifying weak correlator outputs before digitization. IC Role / Device Role / Timing Role: Quad op amp implements dual-path band-pass and low-pass filtering with matched gain and phase response across I/Q channels. Use Value: 2.8 nV/√Hz noise floor preserves carrier-to-noise ratio (C/N₀) critical for fast time-to-first-fix and multipath resilience. |
Use Scenario: Low-noise, high-common-mode-rejection amplification of ECG electrode signals in portable patient monitors. IC Role / Device Role / Timing Role: Configured as three-op-amp instrumentation amplifier (IA) with AD8674ARUZ providing two matched gain stages and reference buffer. Use Value: 75 µV max offset and 0.8 µV/°C drift ensure <1 µV baseline drift over clinical operating temperature range. |
| Professional Audio Preamp | High-Precision Power Supply Monitor |
|
Use Scenario: Microphone preamplification in studio-grade audio interfaces requiring THD+N <0.001% across 20 Hz–20 kHz. IC Role / Device Role / Timing Role: First-stage gain block with 100× non-inverting configuration; remaining channels handle phantom power regulation and level metering. Use Value: 0.0006% THD+N at unity gain and 2.8 nV/√Hz noise enable transparent gain staging without coloration. |
Use Scenario: Real-time monitoring of ±15 V analog supply rails in automated test equipment (ATE), detecting <10 mV deviations for fault logging. IC Role / Device Role / Timing Role: Precision difference amplifier comparing rail voltage against reference; fourth channel buffers reference for all three rails. Use Value: 120 dB open-loop gain and 100 dB CMRR ensure <10 µV measurement error despite shared ground return paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADA4004-4ARUZ | Higher 3.9 nV/√Hz noise, lower 1.8 MHz GBW, but lower 0.4 µV/°C drift and 0.5 nA IB | Better for ultra-low-drift DC applications (e.g., precision DAC buffers); less suitable for wideband GPS filtering | Select ADA4004-4ARUZ when offset drift dominates noise budget; AD8674ARUZ preferred when bandwidth and voltage noise are primary constraints |
| OP4177ARUZ | Lower 1.8 nV/√Hz noise, higher 1.3 MHz GBW, rail-to-rail output, but 25 nA IB and only 105 dB CMRR | Superior for low-voltage, single-supply systems; inferior common-mode rejection limits use in high-CMRR IA front-ends | Choose OP4177ARUZ for battery-powered sensors needing rail-to-rail output; retain AD8674ARUZ for bipolar supply, high-CMRR, and 10 MHz bandwidth needs |
Compared with ADA4004-4ARUZ and OP4177ARUZ, AD8674ARUZ uniquely balances 10 MHz bandwidth, 2.8 nV/√Hz noise, and 120 dB open-loop gain - making it the only quad op amp in its class qualified for simultaneous high-speed, low-noise, and high-precision DC-coupled signal chains.
Availability
AD8674ARUZ is available at Aetrix Electronics and suitable for GPS receiver design, medical instrumentation, professional audio equipment, and high-accuracy power supply monitoring requiring stable component supply and long-term lifecycle assurance.
Supply support for AD8674ARUZ 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 AD867x family was designed specifically for precision instrumentation and sensor signal conditioning, targeting applications demanding ultralow noise, sub-100 µV offset, and stable operation across industrial temperature ranges - with AD8674ARUZ delivering quad-channel integration in space-constrained TSSOP packaging.
FAQ
What is the maximum capacitive load the AD8674ARUZ can drive without external compensation?
The AD8674ARUZ is specified to drive capacitive loads exceeding 1000 pF while maintaining stability in unity-gain configuration. This capability is confirmed in the datasheet's "Driving Capacitive Loads" section and validated through typical performance curves showing stable step response with 1 nF loads. For heavier loads or higher closed-loop gains, external RC compensation (e.g., 500 Ω series resistor + 220 pF capacitor) is recommended to suppress overshoot. The AD8674ARUZ's robust output stage enables direct interface to ADC input filters and long PCB traces without added components in most standard designs.
Does the AD8674ARUZ support dual-supply operation, and what are the valid voltage ranges?
Yes, the AD8674ARUZ supports true dual-supply operation across ±5 V to ±15 V. Absolute maximum ratings allow total supply voltage up to 36 V, but functional operation is guaranteed only within the ±5 V to ±15 V range per the Electrical Characteristics tables. Performance parameters - including noise, offset, and bandwidth - are characterized at both ±5 V and ±15 V conditions. Operation outside this range may cause parametric degradation or damage. The AD8674ARUZ does not support single-supply operation below ±5 V; for such use cases, rail-to-rail alternatives like OP4177ARUZ should be considered instead of AD8674ARUZ.
How does the AD8674ARUZ perform in terms of input offset voltage drift over temperature?
The AD8674ARUZ exhibits a maximum input offset voltage drift of 0.8 µV/°C over the industrial temperature range (–40°C to +85°C). This value is explicitly stated in Table 2 and Table 3 of the datasheet under "Offset Voltage Drift" for AD8674. At 25°C, typical offset is 20 µV, rising to ≤125 µV at temperature extremes. This low drift enables stable DC gain accuracy in applications like precision weigh scales and thermocouple amplifiers where ambient temperature varies. The AD8674ARUZ's drift is higher than the AD8671/AD8672 variants (0.5 µV/°C max), reflecting its quad-channel density trade-off - a key differentiator when selecting among the AD867x family.
Is the AD8674ARUZ pin-compatible with other quad op amps in SOIC or TSSOP packages?
No, the AD8674ARUZ is not pin-compatible with generic quad op amps such as LM324 or TL074 due to its unique 14-pin TSSOP (RU-14) pinout - which allocates dedicated V+ and V– rails shared across all four amplifiers, unlike split-supply or single-supply quads. Its pin assignment (e.g., V+ on Pin 4, V– on Pin 11) differs fundamentally from industry-standard 14-lead SOIC quad layouts. While AD8674ARZ (SOIC_N R-14) shares the same footprint as AD8674ARUZ, the latter's TSSOP variant requires separate PCB layout. Direct replacement requires verification of pin function mapping, especially for supply and output connections - AD8674ARUZ cannot be substituted without board revision.
What is the channel separation specification for the AD8674ARUZ, and why does it matter?
The AD8674ARUZ provides –130 dB channel separation at 1 kHz, as measured in the "Typical Performance Characteristics" section (Figure 29). This metric quantifies isolation between adjacent amplifier channels - meaning a 1 V signal on Channel A induces only 0.3 µV of crosstalk on Channel B at that frequency. High channel separation is essential in multi-channel data acquisition systems (e.g., simultaneous ECG lead monitoring or multi-sensor IoT nodes) to prevent signal leakage that would corrupt correlated measurements. Unlike lower-cost quads with –80 dB separation, the AD8674ARUZ's –130 dB performance ensures accurate independent gain calibration and noise floor integrity across all four channels - a verified characteristic of AD8674ARUZ, not inferred.
AD8674ARUZ 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:
- -
- Slew Rate:
- 4V/µs
- Gain Bandwidth Product:
- 10 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 3 nA
- Voltage - Input Offset:
- 20 µV
- Current - Supply:
- 3mA (x4 Channels)
- Current - Output / Channel:
- 20 mA
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
AD8674ARUZ FAQ
1.How can I place an order for AD8674ARUZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8674ARUZ 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 AD8674ARUZ reliable?
The price and inventory of AD8674ARUZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8674ARUZ is usually 5 days.
3.What payment methods are accepted for AD8674ARUZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8674ARUZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8674ARUZ?
AD8674ARUZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8674ARUZ 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 AD8674ARUZ?
For technical support, including AD8674ARUZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8674ARUZ requirements.
6.How does Aetrix verify that AD8674ARUZ is sourced from the original manufacturer or authorized distributors?
All AD8674ARUZ 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 AD8674ARUZ meets industry standards.
7.What is the process for return or replacement of AD8674ARUZ?
All AD8674ARUZ units undergo pre-shipment inspection (PSI). If there is an issue with AD8674ARUZ, 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 AD8674ARUZ part is unused and in its original packaging.
Return procedure for AD8674ARUZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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