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Analog Devices Inc. AD8571ARMZ
- Part No.:
- AD8571ARMZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD8571ARMZ.pdf
- Description:
- IC OPAMP ZERO-DRIFT 1 CIRC 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:682
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Product details
Overview
AD8571ARMZ 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 AD8571ARMZ datasheet, AD8571ARMZ pinout, AD8571ARMZ application, or AD8571ARMZ 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 industrial and automotive measurement systems.
Technical Context
The AD8571ARMZ employs a spread-spectrum auto-zero architecture with dual internal amplifiers: a main amplifier and a nulling amplifier that periodically samples and cancels its own input offset. This eliminates 1/f noise and intermodulation distortion without requiring external capacitors.
Its rail-to-rail input stage combines NMOS and PMOS differential pairs to support common-mode voltages from V– to V+, while the common-source output stage enables output swing within 1 mV of rails under light load (100 kΩ), degrading to ~30 mV under 10 kΩ load - a trade-off confirmed across −40°C to +125°C operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | 1 μV typical - enables sub-μV error budgets in strain gage or thermocouple amplifiers without trimming. |
| Offset Drift | 0.005 μV/°C - ensures ≤0.6 μV total drift over −40°C to +125°C, critical for uncalibrated automotive sensors. |
| Supply Range | 2.7 V to 5 V single supply - supports direct interfacing with 3.3 V and 5 V microcontrollers and ADCs. |
| Open-Loop Gain | 145 dB typical at 5 V - sustains >100 dB closed-loop accuracy even with 10 kΩ feedback networks. |
| CMRR / PSRR | 140 dB / 130 dB typical - rejects power rail noise and common-mode interference in noisy industrial environments. |
| Slew Rate | 0.4 V/μs at 5 V - sufficient for <1 kHz precision ac signals (e.g., bridge sensor outputs) without distortion. |
| Supply Current | 750 μA per amplifier at 2.7 V - enables low-power battery operation in portable instrumentation. |
Pinout & Package
AD8571ARMZ is packaged in an 8-lead MSOP (RM suffix), 3 mm × 3 mm, 0.65 mm pitch, with exposed pad for thermal enhancement. Pin 1 is marked by a dot; pin 3 is V– (ground reference); pins 1, 3, 4, and 8 are no-connect or unused in this variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Connect | Internally unconnected; must be left floating or tied to GND per layout guidelines. |
| 2 | Inverting Input (−IN A) | Differential input node for primary amplifier; accepts rail-to-rail common-mode voltage (0 V to V+). |
| 3 | Negative Supply (V–) | Ground reference terminal; connects to system GND in single-supply configurations. |
| 4 | No Connect | Internally unconnected; no electrical function. |
| 5 | No Connect | Internally unconnected; no electrical function. |
| 6 | Output (OUT A) | Rail-to-rail output capable of sourcing/sinking ±30 mA; swings within 1 mV of V+ and V– under light load. |
| 7 | Noninverting Input (+IN A) | Differential input node for primary amplifier; matched bias current (<10 pA) minimizes offset in high-Z sources. |
| 8 | Positive Supply (V+) | Single-supply input (2.7 V to 5 V); decoupling capacitor required within 1 cm for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Eliminates 1/f noise and thermal drift accumulation - maintains dc accuracy without periodic recalibration. |
| No external capacitors required | Integrated auto-zero capacitor enables full functionality in space-constrained PCB layouts without added BOM cost. |
| Rail-to-rail I/O | Supports full dynamic range utilization with 3.3 V or 5 V ADCs - maximizes SNR in single-supply data acquisition. |
| Ultralow input bias current | 10 pA typical - prevents loading errors in high-impedance pH electrodes, piezoresistive sensors, and photodiode interfaces. |
| Extended temperature range | Specified from −40°C to +125°C - qualified for under-hood automotive and industrial control applications. |
Applications
| Temperature Sensors | Pressure Sensors |
|---|---|
|
Use Scenario: Amplifying low-level output (≤10 mV/°C) from platinum RTD or thermistor bridges in HVAC controllers. IC Role / Device Role / Timing Role: Precision dc-coupled instrumentation amplifier front end with gain ≥100 and offset error <1 μV. Use Value: Enables direct 16-bit ADC digitization without calibration; 0.005 μV/°C drift contributes <0.02°C error over full automotive range. |
Use Scenario: Conditioning millivolt-level output from MEMS piezoresistive pressure transducers in brake fluid monitoring. IC Role / Device Role / Timing Role: Low-noise, rail-to-rail input buffer driving ratiometric ADC references. Use Value: 1 μV offset ensures <0.01% FS error at 100 kPa full scale; rail-to-rail swing preserves signal headroom at 3.3 V supply. |
| Precision Current Sensing | Strain Gage Amplifiers |
|
Use Scenario: Measuring bidirectional motor phase current via shunt resistor in 12 V automotive ECUs. IC Role / Device Role / Timing Role: High-common-mode rejection current sense amplifier with gain = 50 V/V. Use Value: 140 dB CMRR suppresses PWM switching noise; 750 μA quiescent current minimizes self-heating in sealed enclosures. |
Use Scenario: Amplifying Wheatstone bridge output (0.5–2 mV/V) from load cells in industrial weighing systems. IC Role / Device Role / Timing Role: Low-drift, low-noise instrumentation-grade op amp in 3-op-amp topology. Use Value: 0.005 μV/°C drift limits temperature-induced zero error to <0.002% reading over −40°C to +85°C operating range. |
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 AD8571ARMZ); 0.02 μV/°C drift; 360 μA supply current. | Better power efficiency but higher drift - suitable for battery-powered handheld meters where drift <0.1°C is acceptable. | Select OPA333AIDBVR when ultra-low quiescent current outweighs need for sub-μV dc accuracy. |
| LTC2050IMS8#PBF | 0.5 μV max offset; 0.015 μV/°C drift; requires external 100 nF capacitor for auto-zero; 1.1 mA supply current. | Lower offset but larger package (MSOP-8 vs. MSOP-8 same footprint) and external cap requirement increases layout complexity. | Select LTC2050IMS8#PBF only when absolute lowest offset is mandatory and board area allows for external capacitor. |
Compared with OPA333AIDBVR and LTC2050IMS8#PBF, AD8571ARMZ uniquely balances 1 μV typical offset, 0.005 μV/°C drift, no external components, and MSOP-8 compatibility - making it optimal for space-constrained, high-accuracy industrial sensor nodes requiring long-term stability without recalibration.
Availability
AD8571ARMZ 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 AD8571ARMZ 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 AD8571ARMZ belongs to Analog Devices' zero-drift op amp family designed specifically for precision dc signal conditioning in harsh environments - targeting applications where offset, drift, and noise directly impact measurement integrity.
FAQ
What is the maximum operating temperature for AD8571ARMZ?
AD8571ARMZ is fully specified from −40°C to +125°C ambient temperature. Its guaranteed performance parameters - including 1 μV offset, 0.005 μV/°C drift, and rail-to-rail output swing - are validated across this extended industrial/automotive range, making AD8571ARMZ suitable for under-hood and factory-floor deployments.
Does AD8571ARMZ require external capacitors for auto-zero operation?
No, AD8571ARMZ does not require external capacitors for auto-zero operation. Its spread-spectrum auto-zero architecture integrates all necessary correction capacitance internally, eliminating the need for external components and simplifying layout - a key differentiator versus alternatives like LTC2050 that mandate a 100 nF capacitor.
Can AD8571ARMZ operate from a 3.3 V supply?
Yes, AD8571ARMZ operates from 2.7 V to 5 V single supply, fully supporting standard 3.3 V systems. At 3.3 V, it maintains rail-to-rail input/output swing, 1 μV typical offset, and 140 dB CMRR - enabling direct interface with 3.3 V microcontrollers and SAR ADCs without level-shifting.
What is the overload recovery time of AD8571ARMZ?
AD8571ARMZ has a 50 μs overload recovery time, measured from output saturation to 90% return to linear region. This value is consistent across 2.7 V and 5 V supplies and remains stable over −40°C to +125°C - critical for fast-recovery applications like overcurrent protection circuits and pulse-width modulated sensor excitation.
Is AD8571ARMZ pin-compatible with other op amps in the AD857x family?
No, AD8571ARMZ is not pin-compatible with AD8572 or AD8574 due to differing channel counts and pin assignments. AD8571ARMZ is a single-channel device in 8-lead MSOP; AD8572 (dual) and AD8574 (quad) use distinct pinouts in SOIC/TSSOP packages. Direct substitution requires PCB redesign.
AD8571ARMZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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-MSOP
AD8571ARMZ FAQ
1.How can I place an order for AD8571ARMZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8571ARMZ 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 AD8571ARMZ reliable?
The price and inventory of AD8571ARMZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8571ARMZ is usually 5 days.
3.What payment methods are accepted for AD8571ARMZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8571ARMZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8571ARMZ?
AD8571ARMZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8571ARMZ 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 AD8571ARMZ?
For technical support, including AD8571ARMZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8571ARMZ requirements.
6.How does Aetrix verify that AD8571ARMZ is sourced from the original manufacturer or authorized distributors?
All AD8571ARMZ 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 AD8571ARMZ meets industry standards.
7.What is the process for return or replacement of AD8571ARMZ?
All AD8571ARMZ units undergo pre-shipment inspection (PSI). If there is an issue with AD8571ARMZ, 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 AD8571ARMZ part is unused and in its original packaging.
Return procedure for AD8571ARMZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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