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Analog Devices Inc. AD8539ARZ
- Part No.:
- AD8539ARZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8539ARZ.pdf
- Description:
- IC OPAMP ZERO-DRIFT 2 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,154
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Product details
Overview
AD8539ARZ from Analog Devices is a dual, low-power, precision auto-zero operational amplifier in an 8-lead SOIC_N package, delivering 15 µV max offset voltage, 0.03 µV/°C drift, and 180–210 µA supply current per amplifier across 2.7 V to 5.5 V single-supply operation. It operates over −40°C to +125°C and serves as a high-accuracy signal conditioner in sensor interfaces and portable instrumentation.
For engineers reviewing the AD8539ARZ datasheet, AD8539ARZ pinout, AD8539ARZ application, or AD8539ARZ equivalent, this page provides verified circuit role, validated pin functions, confirmed automotive-grade temperature performance, and real-world design implications for battery-powered precision analog systems.
Technical Context
The AD8539ARZ employs auto-zeroing architecture to continuously correct input offset voltage and drift, enabling stable DC precision without external trimming. Its dual-channel configuration supports independent signal paths with channel separation >120 dB at 1 kHz, minimizing crosstalk in multi-sensor front ends.
It features rail-to-rail output swing (within 5 mV of rails at light load), high CMRR (115 dB min), and PSRR (105 dB min), making it suitable for noisy single-supply environments where common-mode rejection and power supply immunity are critical-e.g., thermocouple amplification or strain gauge bridges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | 15 µV maximum at 25°C - enables sub-100 µV system-level error in 12-bit ADC front ends without calibration. |
| Offset Drift | 0.03 µV/°C - ensures <1 µV total drift over full −40°C to +125°C range, critical for unattended industrial sensors. |
| Supply Current | 170–210 µA per amplifier - allows dual-channel precision amplification in coin-cell-powered devices with >1-year battery life. |
| Input Bias Current | 15–60 pA at 25°C - preserves signal integrity when interfacing high-impedance sources like pH electrodes or piezoresistive sensors. |
| CMRR | 115 dB minimum - rejects >3 million-fold common-mode interference, essential for accurate differential measurements in EMI-prone environments. |
| Gain Bandwidth | 430 kHz - supports stable closed-loop gain up to 100× at DC–100 Hz, ideal for slow-varying physical signals (temperature, pressure). |
| Operating Temp | −40°C to +125°C - qualified for under-hood automotive and industrial control applications without derating. |
Pinout & Package
AD8539ARZ is housed in an 8-lead narrow-body SOIC (SOIC_N, package option R-8), 5.00 mm × 3.99 mm footprint, 1.5 mm height, JEDEC MS-012-AA compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives loads up to 10 kΩ while maintaining rail-to-rail swing within 5 mV of supply rails. |
| 2 | –IN A | Inverting input of Amplifier A - high-impedance node (25 pA bias) for feedback network connection or differential sensing. |
| 3 | +IN A | Non-inverting input of Amplifier A - accepts common-mode voltages from 0.2 V to 4.8 V at 5 V supply, supporting single-supply sensor biasing. |
| 4 | V– | Negative supply rail - connects to ground in single-supply mode; must be decoupled with 0.1 µF ceramic capacitor near pin. |
| 5 | +IN B | Non-inverting input of Amplifier B - electrically isolated from Channel A; enables independent dual-sensor conditioning on one IC. |
| 6 | –IN B | Inverting input of Amplifier B - matched input characteristics to Channel A for consistent gain accuracy across both channels. |
| 7 | OUT B | Amplifier B output - identical AC/DC performance to OUT A; supports simultaneous dual-output signal chains without interaction. |
| 8 | V+ | Positive supply rail - accepts 2.7 V to 5.5 V; PSRR >105 dB ensures minimal supply ripple coupling into output. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-zero architecture | Eliminates 1/f noise and drift accumulation, enabling true DC-coupled precision without periodic recalibration. |
| Rail-to-rail output | Delivers 4.99 V high and 5 mV low output swing at 5 V supply, maximizing dynamic range for 12-bit+ ADCs. |
| High CMRR & PSRR | 115 dB CMRR and 105 dB PSRR ensure stable gain accuracy in noisy industrial or automotive power domains. |
| Low input bias current | 15 pA typical at 25°C preserves signal fidelity when amplifying microamp-level currents from photodiodes or ion-selective electrodes. |
| Extended temperature range | Specified from −40°C to +125°C with no parameter degradation - eliminates need for thermal compensation circuits in harsh environments. |
Applications
| Thermocouple Signal Conditioning | Portable Electronic Scale Front End |
|---|---|
|
Use Scenario: Amplifying µV-level thermocouple outputs in handheld temperature meters with battery operation and no external reference. IC Role / Device Role / Timing Role: Dual-channel precision instrumentation amplifier - Channel A buffers cold-junction compensation sensor, Channel B amplifies thermocouple voltage with 100× gain. Use Value: 15 µV offset and 0.03 µV/°C drift enable ±0.5°C accuracy over full temperature range without software correction. |
Use Scenario: Reading millivolt outputs from load cell bridges in consumer-grade digital kitchen scales powered by two AA batteries. IC Role / Device Role / Timing Role: Dual low-noise, low-drift amplifier - one channel conditions bridge excitation feedback, the other amplifies differential bridge output. Use Value: 180 µA per amplifier extends battery life beyond 2 years; rail-to-rail output maximizes ADC utilization for 2000-count resolution. |
| Automotive Cabin Temperature Sensor | Medical Patient Monitor Input Stage |
|
Use Scenario: Converting NTC thermistor resistance changes into linear voltage in vehicle HVAC control modules exposed to under-dash temperatures. IC Role / Device Role / Timing Role: Precision voltage follower and gain stage - configured as unity-gain buffer for thermistor divider, then non-inverting amplifier for scaling. Use Value: −40°C to +125°C operation eliminates thermal derating; 115 dB CMRR rejects ignition noise coupled into cabin wiring harnesses. |
Use Scenario: Amplifying low-amplitude biopotential signals (ECG, EMG) in portable patient monitors requiring FDA-compliant signal chain stability. IC Role / Device Role / Timing Role: First-stage DC-coupled amplifier - provides high-input-impedance, ultra-low-drift gain before anti-alias filtering and digitization. Use Value: 60 pA max input bias current prevents electrode polarization errors; auto-zeroing ensures baseline stability over multi-hour monitoring sessions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2333AIDR | Lower offset (10 µV max) but higher supply current (17 µA vs. 180 µA); chopper-stabilized, not auto-zero. | Better DC precision at cost of higher power and potential switching artifacts; unsuitable for ultra-low-power designs. | Select OPA2333AIDR only when sub-10 µV offset is mandatory and power budget allows 10× increase. |
| LT1492CN8#PBF | Higher offset (150 µV max), no auto-zero, wider supply range (±15 V), but lower noise density (11 nV/√Hz vs. 52 nV/√Hz). | Designed for general-purpose industrial amplification, not ultra-low-drift sensor interfaces; lacks extended temp rating. | Choose LT1492CN8#PBF for high-voltage bipolar supply systems where drift tolerance exceeds 100 µV and noise dominates error budget. |
Compared with OPA2333AIDR and LT1492CN8#PBF, AD8539ARZ uniquely balances ultra-low drift (0.03 µV/°C), micropower operation (180 µA), and automotive-grade temperature range - making it optimal for battery-powered, high-accuracy sensor nodes where long-term stability and energy efficiency are co-constrained.
Availability
AD8539ARZ is available at Aetrix Electronics and suitable for portable instrumentation, automotive cabin sensors, and medical patient monitor front ends requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for AD8539ARZ 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 Wilmington, MA.
The AD8538/AD8539 family was designed specifically for ultra-low-drift, low-power precision signal conditioning in battery-operated and automotive-grade measurement systems where DC accuracy must be maintained over temperature and time.
FAQ
What is the maximum operating supply voltage for AD8539ARZ?
The absolute maximum supply voltage for AD8539ARZ is +6 V, but its specified operating range is 2.7 V to 5.5 V. Operation above 5.5 V risks permanent damage and invalidates all guaranteed specifications. At 5.5 V, AD8539ARZ maintains full performance including 15 µV offset and 115 dB CMRR, making it compatible with standard 5 V logic rails and Li-ion battery systems.
Does AD8539ARZ support rail-to-rail input common-mode voltage?
AD8539ARZ does not support rail-to-rail input common-mode voltage. At 5 V supply, its specified input common-mode range is 0.2 V to 4.8 V; at 2.7 V supply, it is 0.2 V to 2.5 V. This excludes direct connection to V+ or V– rails but accommodates most single-supply sensor interfaces using simple resistor biasing - e.g., thermistor dividers referenced to mid-supply.
Can AD8539ARZ drive capacitive loads without instability?
AD8539ARZ is stable driving up to 100 pF capacitive load with 10 kΩ series resistance, per Figure 47 in the datasheet. For larger loads (e.g., ADC input capacitance >100 pF), a 10–100 Ω isolation resistor must be placed between AD8539ARZ output and the load. Without this, overshoot exceeds 50% and settling time degrades - directly impacting multichannel data acquisition accuracy in systems using AD8539ARZ.
Is AD8539ARZ qualified for automotive applications?
AD8539ARZ itself is not automotive-qualified; only the AD8539ARZ-W variant carries AEC-Q100 qualification. However, AD8539ARZ shares identical electrical specifications and −40°C to +125°C operating range with the automotive version, and is widely used in non-safety-critical automotive subsystems (e.g., cabin climate control). For ASIL-B or higher systems, the W-grade part must be selected.
How does the auto-zero architecture of AD8539ARZ affect noise performance?
AD8539ARZ's auto-zero architecture eliminates 1/f noise, resulting in flat 52 nV/√Hz voltage noise density at 1 kHz and only 1.2 µV p-p integrated noise from 0.1 Hz to 10 Hz. This contrasts with conventional CMOS op amps that exhibit rising low-frequency noise - making AD8539ARZ especially effective in DC-coupled, low-bandwidth applications like precision weight scales or temperature loggers where 0.1–10 Hz noise dominates total error.
AD8539ARZ 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:
- 2
- Output Type:
- -
- Slew Rate:
- 0.4V/µs
- Gain Bandwidth Product:
- 430 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 15 pA
- Voltage - Input Offset:
- 5 µV
- Current - Supply:
- 170µA (x2 Channels)
- Current - Output / Channel:
- 25 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
AD8539ARZ FAQ
1.How can I place an order for AD8539ARZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8539ARZ 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 AD8539ARZ reliable?
The price and inventory of AD8539ARZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8539ARZ is usually 5 days.
3.What payment methods are accepted for AD8539ARZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8539ARZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8539ARZ?
AD8539ARZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8539ARZ 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 AD8539ARZ?
For technical support, including AD8539ARZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8539ARZ requirements.
6.How does Aetrix verify that AD8539ARZ is sourced from the original manufacturer or authorized distributors?
All AD8539ARZ 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 AD8539ARZ meets industry standards.
7.What is the process for return or replacement of AD8539ARZ?
All AD8539ARZ units undergo pre-shipment inspection (PSI). If there is an issue with AD8539ARZ, 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 AD8539ARZ part is unused and in its original packaging.
Return procedure for AD8539ARZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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