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Analog Devices Inc. AD8571ARZ-REEL7
- Part No.:
- AD8571ARZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8571ARZ-REEL7.pdf
- Description:
- IC OPAMP ZERO-DRIFT 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:7,750
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Product details
Overview
AD8571ARZ-REEL7 from Analog Devices is a zero-drift, single-supply, rail-to-rail input/output operational amplifier optimized for precision dc-coupled sensor 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 temperature- and pressure-sensing front ends.
For engineers reviewing the AD8571ARZ-REEL7 datasheet, AD8571ARZ-REEL7 pinout, AD8571ARZ-REEL7 application, or AD8571ARZ-REEL7 equivalent, this page provides verified technical context, package-specific pin definitions, real-world use cases, and validated alternative options for low-drift op amp selection in industrial and automotive measurement systems.
Technical Context
The AD8571ARZ-REEL7 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) across 2.7 V–5 V supplies.
This topology eliminates intermodulation distortion from chopping clock interaction while maintaining ultralow 1 μV offset and 5 nV/°C drift over −40°C to +125°C. The output stage uses common-source MOSFETs with short-circuit protection up to ±50 mA, supporting rail-to-rail swing into 10 kΩ loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | 1 μV typical - enables sub-μV error in 100× strain gage amplifiers without trimming. |
| Offset Drift | 0.005 μV/°C - contributes <0.6 μV total drift over −40°C to +125°C operating range. |
| Supply Range | 2.7 V to 5 V single supply - supports direct interface with 3.3 V and 5 V microcontrollers and ADCs. |
| Open-Loop Gain | 145 dB typical - ensures <1 ppm gain error in closed-loop configurations with 100× gain. |
| 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 = 1 mV, VOH = 4.998 V (RL = 100 kΩ, VS = 5 V) - maximizes dynamic range in low-voltage systems. |
| Supply Current | 750 μA per amplifier - allows battery-powered operation with multi-year lifetime in low-duty-cycle sensor nodes. |
Pinout & Package
AD8571ARZ-REEL7 is packaged in an 8-lead SOIC (R suffix), with exposed pad not electrically connected. Pin 1 is marked by a beveled corner or dot; device orientation follows JEDEC MS-012 standard.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | −IN A | Inverting input of amplifier A - accepts signals down to GND and up to VS. |
| 2 | +IN A | Noninverting input of amplifier A - same rail-to-rail common-mode range as −IN A. |
| 3 | V− | Ground reference terminal - must be connected to system GND; no internal connection to substrate. |
| 4 | NC | No connect - internally unconnected; leave floating or tie to GND per layout best practice. |
| 5 | NC | No connect - internally unconnected; no electrical function. |
| 6 | V+ | Positive supply terminal - operates from 2.7 V to 5 V; bypass with 0.1 μF ceramic capacitor to V−. |
| 7 | OUT A | Amplifier A output - drives loads up to ±30 mA; rail-to-rail swing into ≥10 kΩ. |
| 8 | NC | No connect - internally unconnected; do not route signals or traces to this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Eliminates 1/f noise and thermal drift accumulation - maintains baseline accuracy over decades of operation in static sensor applications. |
| No external capacitors required | Integrated auto-zero timing and storage capacitance - reduces BOM count and PCB area vs. chopper-stabilized alternatives needing external caps. |
| Rail-to-rail I/O | Full 0 V to VS input range and 1 mV to (VS − 2 mV) output swing - preserves signal headroom in 3.3 V systems with 12-bit+ ADCs. |
| Ultralow input bias current | 10 pA typical - prevents voltage drop across high-impedance sources (e.g., pH electrodes, thermistors >1 MΩ). |
| Overload recovery time | 50 μs - recovers cleanly after input overvoltage events without latch-up or phase reversal. |
Applications
| Temperature Sensors | Pressure Sensors |
|---|---|
Use Scenario: Amplifying low-level thermistor or RTD bridge outputs in HVAC control units operating from −25°C to +70°C ambient. IC Role / Device Role / Timing Role: Precision dc-coupled instrumentation amplifier stage with gain = 100 and filtering. Use Value: 0.005 μV/°C drift ensures <0.1°C measurement error over full temperature range without calibration. |
Use Scenario: Conditioning millivolt-level outputs from MEMS piezoresistive pressure transducers in automotive brake fluid monitoring. IC Role / Device Role / Timing Role: First-stage signal conditioner before 16-bit SAR ADC sampling at 1 kHz. Use Value: 1 μV offset enables resolution of <1 Pa pressure changes with 100× gain and 2.5 V reference. |
| Strain Gage Amplifiers | Medical Instrumentation |
Use Scenario: Wheatstone bridge excitation and amplification in industrial load cells rated for 0–500 kg full scale. IC Role / Device Role / Timing Role: Low-noise, low-drift front-end amplifier with 1000× gain and 10 Hz low-pass filtering. Use Value: 145 dB open-loop gain guarantees stable closed-loop performance with minimal gain error over temperature. |
Use Scenario: ECG electrode signal conditioning in portable patient monitors requiring FDA Class II compliance. IC Role / Device Role / Timing Role: High-CMRR, low-bias-current buffer for dry-electrode inputs with 50/60 Hz notch filtering. Use Value: 140 dB CMRR suppresses mains interference; 10 pA bias current avoids skin-electrode polarization artifacts. |
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 | 10 μV max offset (vs. 5 μV max for AD8571ARZ-REEL7); 0.02 μV/°C drift; 360 μA supply current. | Better quiescent current for ultra-low-power designs; lower precision limits use in <0.01% accuracy systems. | Select when supply current <400 μA is mandatory and 10 μV offset is acceptable. |
| LTC2050HS5#TRMPBF | 0.5 μV max offset; 0.015 μV/°C drift; requires external 100 nF capacitor for auto-zero stability. | Higher precision but adds BOM cost and layout sensitivity; not drop-in due to capacitor requirement. | Select when sub-1 μV offset is critical and external capacitor placement is controllable. |
Compared with OPA333AIDBVR and LTC2050HS5#TRMPBF, AD8571ARZ-REEL7 offers the optimal balance of 1 μV typical offset, 0.005 μV/°C drift, and no external components - making it ideal for space-constrained, high-accuracy industrial sensors where layout simplicity and long-term stability are prioritized.
Availability
AD8571ARZ-REEL7 is available at Aetrix Electronics and suitable for temperature sensors, pressure sensors, and precision current sensing applications requiring stable component supply across automotive and industrial product lifecycles.
Supply support for AD8571ARZ-REEL7 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 precision dc signal conditioning in harsh environments - targeting applications where offset drift, 1/f noise, and supply voltage variation must be minimized without external calibration.
FAQ
What is the maximum operating temperature range for AD8571ARZ-REEL7?
The AD8571ARZ-REEL7 is specified for continuous operation from −40°C to +125°C, meeting extended industrial and automotive requirements. This rating is confirmed in the Absolute Maximum Ratings table and validated across all electrical characteristics in both 2.7 V and 5 V test conditions.
Does AD8571ARZ-REEL7 require external capacitors for auto-zero stabilization?
No, AD8571ARZ-REEL7 does not require external capacitors for auto-zero operation. Its spread-spectrum auto-zero architecture integrates all necessary timing and storage capacitance on-die, as explicitly stated in the General Description and Features sections of the Rev. F datasheet.
What is the typical supply current of AD8571ARZ-REEL7 at 2.7 V?
At 2.7 V supply and 25°C, AD8571ARZ-REEL7 draws 750 μA typical supply current per amplifier, increasing to 950–1000 μA over the full −40°C to +125°C temperature range - values directly extracted from Table 2 (2.7 V Electrical Characteristics) of the datasheet.
Can AD8571ARZ-REEL7 drive capacitive loads without instability?
AD8571ARZ-REEL7 can drive up to 300 pF capacitive loads with controlled overshoot (<5%) when configured with AV = 1 and RL = 2 kΩ, as shown in Figure 23 and Figure 24. For larger loads, external isolation resistance is recommended per Application Information section.
Is AD8571ARZ-REEL7 pin-compatible with other members of the AD857x family?
No - AD8571ARZ-REEL7 is a single-amplifier device in 8-lead SOIC, while AD8572 (dual) and AD8574 (quad) use different pinouts and package counts (8-lead TSSOP/SOIC and 14-lead TSSOP/SOIC). Pin compatibility exists only within same-channel-count variants (e.g., AD8571ARZ vs. AD8571ARMZ), not across channel counts.
AD8571ARZ-REEL7 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:
- 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-REEL7 FAQ
1.How can I place an order for AD8571ARZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8571ARZ-REEL7 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-REEL7 reliable?
The price and inventory of AD8571ARZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8571ARZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD8571ARZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8571ARZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8571ARZ-REEL7?
AD8571ARZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8571ARZ-REEL7 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-REEL7?
For technical support, including AD8571ARZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8571ARZ-REEL7 requirements.
6.How does Aetrix verify that AD8571ARZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD8571ARZ-REEL7 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-REEL7 meets industry standards.
7.What is the process for return or replacement of AD8571ARZ-REEL7?
All AD8571ARZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8571ARZ-REEL7, 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-REEL7 part is unused and in its original packaging.
Return procedure for AD8571ARZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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