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Analog Devices Inc. AD8671ARMZ-REEL
- Part No.:
- AD8671ARMZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD8671ARMZ-REEL.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:7,908
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Product details
Overview
AD8671ARMZ-REEL from Analog Devices is a precision single-channel operational amplifier optimized for low-noise, high-gain-accuracy signal conditioning in instrumentation and sensor interfaces. It delivers 2.8 nV/√Hz voltage noise density, 10 MHz gain bandwidth, ≤75 µV max offset voltage, ≤12 nA max input bias current, and operates from ±5 V to ±15 V supplies across –40°C to +125°C. It is used in GPS receiver filters and professional audio preamplifiers where ultralow noise and dc precision are critical.
For engineers reviewing the AD8671ARMZ-REEL datasheet, AD8671ARMZ-REEL pinout, AD8671ARMZ-REEL application, or AD8671ARMZ-REEL equivalent, key selection criteria include verified 2.8 nV/√Hz noise performance at 1 kHz, confirmed 10 MHz GBP with unity-gain stability, validated MSOP-8 thermal resistance (θJA = 142°C/W), and documented absence of phase reversal beyond supply rails.
Technical Context
The AD8671ARMZ-REEL employs a bipolar input stage optimized for ultralow voltage noise and low input bias current-achieving 2.8 nV/√Hz and ≤12 nA simultaneously-while maintaining 120 dB min open-loop gain and 100 dB min CMRR over temperature. Its architecture supports stable operation with >1000 pF capacitive loads and exhibits no phase reversal even when inputs exceed supply rails by 1 V.
Designed for high-precision analog front-ends, it features rail-to-rail output swing into 2 kΩ (±3.8 V/±3.9 V at ±5 V), 4 V/µs slew rate, and 1.4 µs settling to 0.1% for 4 V steps. Input common-mode range extends to ±2.5 V (±5 V supply) or ±12 V (±15 V supply), enabling direct interfacing with precision reference buffers and transducer outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage Noise Density | 2.8 nV/√Hz @ 1 kHz - enables sub-100 nV p-p total input-referred noise in 0.1–10 Hz band for high-resolution DC measurements |
| Gain Bandwidth Product | 10 MHz - supports stable closed-loop gains up to 100 at 100 kHz without peaking or instability |
| Input Offset Voltage | ≤75 µV max @ 25°C - ensures <0.0075% gain error in 1 V full-scale 16-bit systems |
| Input Bias Current | ≤12 nA max @ 25°C - allows use with high-impedance pH sensors and photodiode transimpedance stages without significant offset drift |
| Supply Voltage Range | ±5 V to ±15 V - compatible with legacy industrial ±12 V and modern ±5 V analog subsystems |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial control applications |
| Output Drive | ±10 mA @ ±5 V - sufficient to drive 600 Ω loads directly, reducing need for external buffer stages |
Pinout & Package
AD8671ARMZ-REEL is housed in an 8-lead MSOP (RM-8) package measuring 3.0 mm × 3.0 mm × 0.85 mm, with exposed pad for thermal enhancement. Pin 1 is marked by a dot; pins 1, 5, and 8 are no-connect (NC) internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NC | No internal connection - must be left floating or grounded per layout best practices |
| 2 | Inverting Input (–IN) | Differential input node with 6.25 pF common-mode capacitance and 3.5 GΩ input resistance |
| 3 | Non-inverting Input (+IN) | Differential input node with identical impedance and noise characteristics as –IN |
| 4 | Negative Supply (V–) | Return path for dual-supply operation; connects to system ground in single-supply configurations with level-shifting |
| 5 | NC | No internal connection - must be left floating or grounded per layout best practices |
| 6 | Output (OUT) | Class AB output stage capable of ±10 mA drive into 2 kΩ with <1.4 µs 0.1% settling |
| 7 | Positive Supply (V+) | Primary power rail; supports ±5 V to ±15 V operation with PSRR ≥110 dB |
| 8 | NC | No internal connection - must be left floating or grounded per layout best practices |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Guaranteed operation without polarity inversion when inputs exceed ±15 V supplies by 1 V - eliminates latch-up risk in overvoltage transient conditions |
| Capacitive load drive | Stable with >1000 pF loads - enables direct interface to ADC input filters and long PCB traces without external isolation resistors |
| Low 1/f noise corner | 0.1 Hz to 10 Hz peak-to-peak noise = 77 nV - critical for precision weigh scales and thermocouple amplifiers requiring low-frequency stability |
| High open-loop gain | ≥120 dB min - ensures <1 ppm gain error in closed-loop configurations with feedback resistors up to 1 MΩ |
| Thermal performance | θJA = 142°C/W (MSOP) - enables reliable operation at 3.5 mA supply current with <12°C junction rise at 30°C ambient |
Applications
| GPS Receiver Front-End | Medical Instrumentation Amplifier |
|---|---|
Use Scenario: Low-noise amplification of L1-band IF signals (1.575 GHz downconverted to ~10–20 MHz) before digitization in handheld GPS modules. IC Role / Device Role / Timing Role: Precision op amp in active band-pass filter stage, providing gain, noise shaping, and impedance matching between mixer and ADC driver. Use Value: 2.8 nV/√Hz noise density minimizes degradation of carrier-to-noise ratio (C/N₀); 10 MHz GBP ensures flat group delay across 2–20 MHz filter passband. |
Use Scenario: First-stage amplification of microvolt-level ECG electrode signals in portable patient monitors. IC Role / Device Role / Timing Role: Ultra-low-noise, low-drift instrumentation amplifier input stage, rejecting common-mode interference while preserving ST-segment morphology. Use Value: ≤75 µV offset and 0.5 µV/°C drift ensure baseline stability over clinical operating temperatures; 120 dB CMRR suppresses 50/60 Hz mains coupling. |
| Professional Audio Preamp | High-Accuracy Power Supply Monitor |
Use Scenario: Mic preamplifier stage in studio-grade audio interfaces requiring THD+N <0.0006% at 1 kHz. IC Role / Device Role / Timing Role: Unity-gain stable voltage follower and gain stage for condenser microphone capsules and line-level signal routing. Use Value: 77 nV p-p 0.1–10 Hz noise prevents audible hiss; 4 V/µs slew rate supports clean transient response up to 20 kHz without slew-induced distortion. |
Use Scenario: Precision sensing of ±12 V rail voltages in telecom power shelves, feeding ADC inputs for real-time margining and fault detection. IC Role / Device Role / Timing Role: High-impedance differential monitor amplifier with programmable gain, isolating measurement circuitry from noisy power planes. Use Value: ≤12 nA input bias current avoids loading of high-value divider networks; 100 dB PSRR rejects switching noise from adjacent DC-DC converters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADA4004-1ARMZ | Lower noise (1.8 nV/√Hz), lower GBP (12 MHz), higher supply current (4.5 mA), same MSOP-8 package | Better suited for ultra-low-noise DC-coupled applications below 100 kHz; less optimal for wideband filtering above 1 MHz | Select ADA4004-1ARMZ when 1.8 nV/√Hz noise is prioritized over power efficiency and cost |
| OPA227UA | Higher offset (25 µV typ), higher noise (3.5 nV/√Hz), SOIC-8 only, no MSOP option | Preferred in legacy designs using SOIC footprints; lacks extended temperature rating (–40°C to +125°C) | Select OPA227UA only if board space permits SOIC-8 and operating temperature stays within –40°C to +85°C |
Compared with ADA4004-1ARMZ and OPA227UA, AD8671ARMZ-REEL offers the best balance of ultralow noise (2.8 nV/√Hz), wide bandwidth (10 MHz), low power (3.5 mA), and extended temperature range (–40°C to +125°C) in the compact MSOP-8 footprint-making it optimal for space-constrained, high-reliability industrial and automotive signal chains.
Availability
AD8671ARMZ-REEL is available at Aetrix Electronics and suitable for GPS receiver design, medical instrumentation, professional audio equipment, and high-accuracy power monitoring systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD8671ARMZ-REEL 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 decades of expertise in precision amplification and data conversion.
The AD867x family was designed specifically for high-fidelity signal conditioning in demanding instrumentation, sensor, and communications applications-where simultaneous optimization of noise, offset, bandwidth, and thermal stability is non-negotiable.
FAQ
What is the maximum capacitive load the AD8671ARMZ-REEL can drive stably?
The AD8671ARMZ-REEL is specified to drive capacitive loads exceeding 1000 pF without oscillation or excessive ringing. In unity-gain configuration, stability is maintained up to 1 nF per the datasheet's Figure 34. For heavier loads (>1 nF) or low closed-loop gain, external compensation (e.g., series resistor + capacitor network per Figure 35) is recommended to preserve phase margin. The AD8671ARMZ-REEL's robust output stage enables direct driving of ADC input filters and long PCB traces without added isolation components.
Does the AD8671ARMZ-REEL exhibit phase reversal when input voltage exceeds supply rails?
No, the AD8671ARMZ-REEL does not exhibit phase reversal-even when input voltages exceed the positive or negative supply rails by up to 1 V. This behavior is explicitly confirmed in the "Output Phase Reversal" section (Page 12) of the Rev. F datasheet and verified across the full –40°C to +125°C operating range. This eliminates risk of latch-up or erroneous output states during transient overvoltage events in sensor front-ends or protection circuits containing the AD8671ARMZ-REEL.
What is the thermal resistance (θJA) of the AD8671ARMZ-REEL in its MSOP-8 package?
The AD8671ARMZ-REEL has a junction-to-ambient thermal resistance (θJA) of 142°C/W when mounted on a standard 4-layer PCB, as specified in Table 5 of the Rev. F datasheet. This value assumes worst-case PCB layout conditions. With a typical supply current of 3.5 mA at ±12 V (84 mW dissipation), the junction temperature rise above ambient is approximately 12°C-ensuring reliable operation well within the 150°C absolute maximum junction temperature limit. The AD8671ARMZ-REEL's MSOP package provides superior thermal performance per unit area versus SOIC alternatives.
Can the AD8671ARMZ-REEL operate from a single 5 V supply?
Yes, the AD8671ARMZ-REEL supports single-supply operation down to +5 V (with ground as V–), though its input common-mode range is limited to 0 V to +2.5 V and output swing is typically 0.2 V from each rail (i.e., ~0.2 V to ~4.8 V into 2 kΩ). For true rail-to-rail input/output performance on single 5 V, a different amplifier family (e.g., AD8605) is recommended. The AD8671ARMZ-REEL is optimized for dual-supply precision applications; its specifications (e.g., ±5 V to ±15 V range, ±125°C rating) reflect this design focus.
How does the AD8671ARMZ-REEL compare to the AD8672ARMZ-REEL in terms of noise and packaging?
The AD8671ARMZ-REEL and AD8672ARMZ-REEL share identical electrical specifications-including 2.8 nV/√Hz voltage noise density, 10 MHz GBP, and ≤75 µV offset-because they belong to the same silicon family and process. Both are offered in the 8-lead MSOP (RM-8) package with identical pinout and thermal characteristics (θJA = 142°C/W). The sole functional difference is channel count: AD8671ARMZ-REEL is single-channel, while AD8672ARMZ-REEL integrates two matched amplifiers. System designers select AD8671ARMZ-REEL for space-optimized single-channel paths and AD8672ARMZ-REEL where channel matching or board area reduction is critical.
AD8671ARMZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- 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
- Current - Output / Channel:
- 20 mA
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
AD8671ARMZ-REEL FAQ
1.How can I place an order for AD8671ARMZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8671ARMZ-REEL 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 AD8671ARMZ-REEL reliable?
The price and inventory of AD8671ARMZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8671ARMZ-REEL is usually 5 days.
3.What payment methods are accepted for AD8671ARMZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8671ARMZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8671ARMZ-REEL?
AD8671ARMZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8671ARMZ-REEL 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 AD8671ARMZ-REEL?
For technical support, including AD8671ARMZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8671ARMZ-REEL requirements.
6.How does Aetrix verify that AD8671ARMZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD8671ARMZ-REEL 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 AD8671ARMZ-REEL meets industry standards.
7.What is the process for return or replacement of AD8671ARMZ-REEL?
All AD8671ARMZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD8671ARMZ-REEL, 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 AD8671ARMZ-REEL part is unused and in its original packaging.
Return procedure for AD8671ARMZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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