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Analog Devices Inc. AD8571ARZ
- Part No.:
- AD8571ARZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8571ARZ.pdf
- Description:
- IC OPAMP ZERO-DRIFT 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:365
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Product details
Overview
AD8571ARZ from Analog Devices is a zero-drift, single-supply, rail-to-rail input/output operational amplifier optimized for precision dc-coupled signal conditioning. It delivers 1 μV typical offset voltage, 0.005 μV/°C drift, 145 dB open-loop gain, and 1.5 MHz gain bandwidth at 5 V supply - enabling high-accuracy amplification in sensor front-ends and medical instrumentation.
For engineers reviewing the AD8571ARZ datasheet, AD8571ARZ pinout, AD8571ARZ application, or AD8571ARZ equivalent, this page provides verified technical context, package-specific pin mapping, real-world use cases, and validated alternative options for low-drift op amp selection in extended temperature industrial and automotive systems.
Technical Context
The AD8571ARZ employs a spread-spectrum auto-zero architecture with dual internal amplifiers: a main amplifier and a nulling amplifier that periodically samples and cancels input offset. Its CMOS input stage combines NMOS and PMOS differential pairs to achieve true rail-to-rail common-mode input range (0 V to VS) and output swing (within 10 mV of rails at light load).
This topology eliminates intermodulation distortion from chopping clock interaction with signal frequencies while maintaining ultralow 1 μV offset and 5 nV/°C drift over −40°C to +125°C. No external capacitors are required for stabilization, and overload recovery time is specified at 50 μs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | 1 μV typical - enables sub-μV error contribution in 100× gain strain gage or thermocouple circuits without trimming. |
| Offset Drift | 0.005 μV/°C - ensures ≤0.6 μV total drift across −40°C to +125°C, critical for uncalibrated temperature sensors. |
| Supply Range | 2.7 V to 5 V single supply - supports direct interface with 3.3 V and 5 V microcontrollers and ADCs without level-shifting. |
| CMRR / PSRR | 140 dB / 130 dB typical - rejects power supply ripple and common-mode noise in noisy industrial environments. |
| Output Swing | Rail-to-rail: VOL = 10 mV, VOH = 4.99 V (RL = 100 kΩ, VS = 5 V) - maximizes dynamic range for 12-bit+ ADC interfacing. |
| Gain Bandwidth | 1.5 MHz at 5 V - sufficient for closed-loop gains up to 100 at 10 kHz with stable phase margin. |
| Supply Current | 750 μA per amplifier - allows battery-powered precision sensing with multi-year operation on coin cells. |
Pinout & Package
AD8571ARZ is packaged in an 8-lead narrow SOIC (R suffix), with thermal resistance θJA = 158°C/W. Pin 1 is marked by a beveled corner or dot; the device has two no-connect (NC) pins.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | −IN A | Inverting input of amplifier A - accepts differential signals referenced to ground or mid-supply. |
| 2 | +IN A | Noninverting input of amplifier A - used for unity-gain buffers or high-impedance sensor interfaces. |
| 3 | V− | Negative supply terminal - tied to GND in single-supply configurations; must be decoupled with 0.1 μF ceramic capacitor. |
| 4 | NC | No connect - left floating; not bonded internally and electrically isolated. |
| 5 | NC | No connect - left floating; not bonded internally and electrically isolated. |
| 6 | V+ | Positive supply terminal - accepts 2.7 V to 5 V; requires local 0.1 μF bypass capacitor near pin. |
| 7 | OUT A | Amplifier A output - drives loads ≥10 kΩ directly; degrades to ±15 mA max output current at full temperature range. |
| 8 | NC | No connect - left floating; not bonded internally and electrically isolated. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Spread-spectrum auto-zero eliminates 1/f noise and intermodulation distortion without external capacitors. |
| Rail-to-rail I/O | Input common-mode range spans 0 V to VS; output swings within 10 mV of both rails at light load - preserves full ADC input range. |
| Ultralow input bias current | 10 pA typical - avoids voltage errors in high-impedance pH or piezoelectric sensor interfaces (>100 MΩ source impedance). |
| Extended temperature grade | Specified from −40°C to +125°C - qualified for under-hood automotive and industrial control applications. |
| High open-loop gain | 145 dB typical - ensures <0.001% gain error in precision instrumentation amplifier configurations. |
Applications
| Temperature Sensors | Pressure Sensors |
|---|---|
|
Use Scenario: Amplifying low-level thermistor or RTD bridge outputs in HVAC controllers and battery management systems. IC Role / Device Role / Timing Role: Precision dc-coupled gain stage with offset cancellation to resolve <0.1°C changes without calibration. Use Value: 1 μV offset and 0.005 μV/°C drift limit temperature measurement error to <0.02°C over full industrial range. |
Use Scenario: Conditioning millivolt-level outputs from silicon piezoresistive pressure transducers in medical ventilators. IC Role / Device Role / Timing Role: Low-noise, rail-to-rail input buffer driving 24-bit sigma-delta ADCs with minimal gain error. Use Value: 140 dB CMRR rejects common-mode noise from motor-driven pneumatic systems; 10 pA bias current prevents bridge imbalance. |
| Precision Current Sensing | Strain Gage Amplifiers |
|
Use Scenario: Measuring bidirectional motor phase currents in BLDC inverters using shunt resistors below 10 mΩ. IC Role / Device Role / Timing Role: High-side or low-side current sense amplifier with rail-to-rail output for 3.3 V ADC input scaling. Use Value: 1.5 MHz GBW supports accurate pulse-width modulated current reconstruction; 50 μs overload recovery prevents latch-up during fault events. |
Use Scenario: Amplifying Wheatstone bridge outputs from load cells in industrial weighing scales and structural monitoring. IC Role / Device Role / Timing Role: Instrumentation-grade front-end with matched input impedance and ultralow drift for ratiometric measurements. Use Value: 145 dB open-loop gain ensures <0.005% nonlinearity; rail-to-rail output fully utilizes 20-bit ADC dynamic range at 5 V supply. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA333AIDBVR | 1.8 μV offset, 0.02 μV/°C drift, 350 μA supply current, 350 kHz GBW - lower power but higher drift and bandwidth limitation. | Better suited for ultra-low-power battery devices where drift tolerance >0.1 μV/°C is acceptable. | Select OPA333AIDBVR when supply current <400 μA is mandatory and 12-bit accuracy suffices. |
| LTC2050CS5#TRMPBF | 0.5 μV offset, 0.015 μV/°C drift, 1.1 mA supply current, 3 MHz GBW - superior offset but higher quiescent current and cost. | Preferred for aerospace-grade metrology where sub-μV offset stability outweighs power budget constraints. | Select LTC2050CS5#TRMPBF when absolute offset <0.7 μV and 16-bit+ resolution are required across −55°C to +125°C. |
Compared with OPA333AIDBVR and LTC2050CS5#TRMPBF, AD8571ARZ offers the optimal balance of ultralow drift (0.005 μV/°C), moderate supply current (750 μA), and sufficient bandwidth (1.5 MHz) for industrial sensor signal chains requiring 14–16-bit accuracy without thermal recalibration.
Availability
AD8571ARZ is available at Aetrix Electronics and suitable for precision current sensing, strain gage amplification, and medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD8571ARZ 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 AD857x family was designed specifically for high-accuracy, low-drift signal conditioning in harsh-environment applications - targeting industrial automation, automotive subsystems, and portable medical diagnostics where dc precision and ac fidelity must coexist.
FAQ
What is the operating temperature range for AD8571ARZ?
The AD8571ARZ is specified for continuous operation from −40°C to +125°C. This extended industrial/automotive temperature range is validated across all key parameters including offset voltage, drift, CMRR, and output drive capability - making AD8571ARZ suitable for under-hood automotive sensors and factory-floor PLC modules where ambient temperatures exceed 85°C.
Does AD8571ARZ require external capacitors for stability?
No, AD8571ARZ does not require external capacitors for stability. Its spread-spectrum auto-zero architecture eliminates the need for external nulling or compensation capacitors - simplifying PCB layout and reducing bill-of-materials cost. The amplifier remains stable driving capacitive loads up to 300 pF with appropriate series resistance, as confirmed in Figure 23 and Figure 24 of the datasheet.
What package type is used for AD8571ARZ?
AD8571ARZ uses the 8-lead narrow SOIC package (suffix R), with pin 1 identified by a beveled corner or dot. This package has θJA = 158°C/W and is RoHS-compliant. It is distinct from the MSOP (RM) variant and shares pin compatibility only with other SOIC-packaged members of the AD857x family.
Can AD8571ARZ operate from a 3.3 V supply?
Yes, AD8571ARZ operates from 2.7 V to 5 V single supply, fully supporting 3.3 V systems. At 3.3 V, it maintains rail-to-rail input/output swing, 1 μV offset, and 1 MHz gain bandwidth (per Table 2). Output voltage swing is specified as VOH = 3.285 V and VOL = 10 mV (RL = 100 kΩ), ensuring compatibility with 3.3 V ADC references.
How does AD8571ARZ handle input overvoltage conditions?
AD8571ARZ includes internal input protection diodes rated for ±5 V differential input voltage or supply rail limits, whichever is smaller. Absolute maximum ratings specify input voltage range as GND − 0.3 V to VS + 0.3 V. Exceeding these limits risks permanent damage; external clamping is recommended in systems with transient overvoltage risk, such as motor drive feedback paths.
AD8571ARZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Zero-Drift
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.4V/µs
- Gain Bandwidth Product:
- 1.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 10 pA
- Voltage - Input Offset:
- 1 µV
- Current - Supply:
- 850µA
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AD8571ARZ FAQ
1.How can I place an order for AD8571ARZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8571ARZ 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 AD8571ARZ reliable?
The price and inventory of AD8571ARZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8571ARZ is usually 5 days.
3.What payment methods are accepted for AD8571ARZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8571ARZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8571ARZ?
AD8571ARZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8571ARZ 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 AD8571ARZ?
For technical support, including AD8571ARZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8571ARZ requirements.
6.How does Aetrix verify that AD8571ARZ is sourced from the original manufacturer or authorized distributors?
All AD8571ARZ 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 AD8571ARZ meets industry standards.
7.What is the process for return or replacement of AD8571ARZ?
All AD8571ARZ units undergo pre-shipment inspection (PSI). If there is an issue with AD8571ARZ, 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 AD8571ARZ part is unused and in its original packaging.
Return procedure for AD8571ARZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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