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Analog Devices Inc. AD8502ARJZ-REEL7
- Part No.:
- AD8502ARJZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8
- Datasheet:
-
AD8502ARJZ-REEL7.pdf
- Description:
- IC CMOS 2 CIRCUIT SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:16,376
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Product details
Overview
AD8502ARJZ-REEL7 from Analog Devices is a dual-channel, micropower CMOS operational amplifier in an 8-lead SOT-23 package, delivering 1 μA maximum supply current per amplifier, 3 mV maximum offset voltage, and rail-to-rail input/output operation. It operates from single supplies as low as +1.8 V and supports precision signal conditioning in ultra-low-power sensor front-ends and portable medical devices.
For engineers reviewing the AD8502ARJZ-REEL7 datasheet, AD8502ARJZ-REEL7 pinout, AD8502ARJZ-REEL7 application, or AD8502ARJZ-REEL7 equivalent, key selection criteria include guaranteed 1 μA max quiescent current at 25°C and −40°C to +125°C operation, rail-to-rail swing with <5 mV output saturation at 10 kΩ load, and 1 pA typical input bias current enabling high-impedance transducer interfacing.
Technical Context
The AD8502ARJZ-REEL7 implements a CMOS input stage with 1 pA typical input bias current and rail-to-rail common-mode input range (0 V to VS). Its unity-gain-stable architecture achieves 7 kHz gain-bandwidth product and 60° phase margin, supporting stable operation with capacitive loads up to 100 pF without external compensation.
It features no phase reversal under overdrive conditions and maintains 65 dB minimum CMRR across −40°C to +125°C. The device's 7 μV/°C offset drift (−40°C to +85°C) and 190 nV/√Hz voltage noise density at 1 kHz support precision DC-coupled amplification in battery-powered instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 1 μA maximum per amplifier - enables multi-year battery life in coin-cell–powered sensors. |
| Offset Voltage | 3 mV maximum - ensures ≤3 mV output error at unity gain, eliminating need for system-level calibration in low-gain signal chains. |
| Input Bias Current | 1 pA typical - preserves signal integrity when interfacing with high-impedance sources like pH electrodes or piezoresistive sensors. |
| Rail-to-Rail I/O | Input range: 0 V to VS; Output swing: within 5 mV of rails at 100 kΩ load - maximizes dynamic range in 1.8 V–5.5 V single-supply systems. |
| Gain Bandwidth | 7 kHz - sufficient for DC–1 kHz sensor signal conditioning, including ECG front-ends and temperature transducer amplification. |
| Operating Temp | −40°C to +125°C - qualified for automotive cabin modules, industrial remote monitors, and medical wearables requiring extended thermal robustness. |
| PSRR | 85 dB minimum (1.8 V–5 V supply) - rejects power rail noise in noisy embedded environments without additional filtering. |
Pinout & Package
AD8502ARJZ-REEL7 is housed in an 8-lead SOT-23 (RJ-8) package per JEDEC MO-178-BA, with 1.95 mm × 2.95 mm footprint and 0.65 mm lead pitch. Thermal resistance θJA = 376°C/W enables operation in compact PCB layouts without forced airflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT A | Amplifier A output | Delivers rail-to-rail buffered signal; capable of sourcing/sinking ±5 mA short-circuit current. |
| 2 - –IN A | Inverting input A | High-impedance CMOS node; accepts common-mode voltages from 0 V to VS. |
| 3 - +IN A | Non-inverting input A | Matches –IN A characteristics; enables precision differential sensing with minimal input error. |
| 4 - V– | Negative supply / ground reference | Connects to system ground in single-supply configurations; supports dual-supply operation down to ±0.9 V. |
| 5 - +IN B | Non-inverting input B | Independent channel input; electrically isolated from Channel A for dual-sensor signal paths. |
| 6 - –IN B | Inverting input B | Same CMOS input structure as Pin 2; enables matched dual-channel design without cross-talk. |
| 7 - OUT B | Amplifier B output | Functionally identical to Pin 1; supports independent gain stages or feedback networks per channel. |
| 8 - V+ | Positive supply | Accepts 1.8 V–5.5 V single supply or ±0.9 V–±2.75 V dual supply; PSRR >85 dB suppresses supply ripple. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Guaranteed under input overdrive - prevents latch-up or erroneous output transitions in threshold-detection circuits. |
| Rail-to-rail input | Common-mode range extends to both supply rails - eliminates level-shifting circuitry in low-voltage sensor interfaces. |
| Unity-gain stable | Operates without external compensation at gain = 1 - simplifies design of buffer stages and active filters. |
| Low offset drift | 7 μV/°C max (−40°C to +85°C) - reduces temperature-induced baseline drift in long-duration monitoring applications. |
| High CMRR | 67 dB min at 25°C - rejects common-mode interference in noisy industrial or automotive environments. |
Applications
| Portable Medical Sensors | Remote Environmental Monitors |
|---|---|
|
Use Scenario: Glucose meter analog front-end amplifying amperometric sensor current. IC Role / Device Role / Timing Role: Dual-channel transimpedance amplifier converting pA-level sensor current to measurable voltage with minimal power draw. Use Value: 1 μA supply current extends CR2032 battery life beyond 2 years; rail-to-rail output ensures full ADC utilization at 1.8 V supply. |
Use Scenario: Battery-powered smoke detector measuring ionization chamber current. IC Role / Device Role / Timing Role: Low-drift comparator input buffer rejecting EMI while preserving weak ion current signals. Use Value: 1 pA input bias current prevents leakage-induced false alarms; −40°C to +125°C rating supports attic and garage installations. |
| Low-Power Industrial IoT Nodes | Wearable Biopotential Acquisition |
|
Use Scenario: Vibration sensor signal conditioning in predictive maintenance edge node. IC Role / Device Role / Timing Role: Dual op-amp implementing anti-aliasing filter and gain stage before 12-bit SAR ADC. Use Value: 7 kHz GBW supports 1 kHz cutoff filtering; 3 mV offset avoids DC correction firmware overhead in firmware-limited microcontrollers. |
Use Scenario: Pulse oximeter photodiode current amplification with ambient light cancellation. IC Role / Device Role / Timing Role: Precision dual amplifier enabling synchronous detection of red/IR LED signals with matched gain paths. Use Value: Matched channels minimize inter-channel gain mismatch; 190 nV/√Hz noise density preserves SNR in sub-μV biopotential signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel micropower op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADA4505-2ARMZ | Higher supply current (10 μA vs. 1 μA), lower offset (125 μV max), same SOT-23-8 package. | Better DC precision but 10× higher quiescent current limits battery life in always-on sensors. | Select ADA4505-2ARMZ only when offset-critical DC accuracy outweighs energy budget constraints. |
| LPV821IDBVR | Lower supply current (320 nA), higher offset (1.25 mV max), same rail-to-rail I/O, SOT-23-5 (single-channel). | Requires two units for dual-channel function; superior battery life but increased board area and BOM count. | Choose LPV821IDBVR for ultra-long-life single-channel designs where space permits dual placement. |
Compared with ADA4505-2ARMZ and LPV821IDBVR, AD8502ARJZ-REEL7 uniquely balances sub-μA power, 3 mV offset, and true dual-channel integration in SOT-23-8-making it optimal for space-constrained, battery-operated dual-signal-path systems requiring calibrated performance without firmware compensation.
Availability
AD8502ARJZ-REEL7 is available at Aetrix Electronics and suitable for portable medical devices, remote environmental monitors, and low-power industrial IoT nodes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD8502ARJZ-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, with R&D and manufacturing operations worldwide.
The AD8502/AD8504 family was designed specifically for ultra-low-power, precision signal conditioning in battery-constrained applications-emphasizing micropower operation, rail-to-rail functionality, and industrial-grade temperature resilience without sacrificing DC accuracy.
FAQ
What is the maximum operating temperature range for AD8502ARJZ-REEL7?
The AD8502ARJZ-REEL7 is fully specified from −40°C to +125°C, meeting extended industrial requirements. This range is validated across all key parameters-including supply current (≤2 μA at +125°C), offset voltage (≤5.5 mV), and output drive capability-ensuring reliable operation in automotive cabin modules and outdoor sensor housings.
Does AD8502ARJZ-REEL7 support single-supply operation below 2.0 V?
Yes, AD8502ARJZ-REEL7 operates down to +1.8 V single supply with full rail-to-rail input/output swing and guaranteed 1 μA max supply current. At 1.8 V, output high remains ≥1.79 V into 100 kΩ, and input common-mode range covers 0 V to 1.8 V-enabling direct interface with low-voltage microcontrollers and energy-harvesting PMUs.
Can AD8502ARJZ-REEL7 drive capacitive loads without oscillation?
AD8502ARJZ-REEL7 is unity-gain stable and tested to drive up to 100 pF capacitive loads without external compensation, as confirmed by small-signal overshoot data (Figure 17 and Figure 35). For loads >100 pF, a series resistor (≥100 Ω) between output and capacitance restores stability while maintaining DC accuracy.
Is AD8502ARJZ-REEL7 pin-compatible with other dual op-amps in SOT-23-8?
No-AD8502ARJZ-REEL7 uses a nonstandard SOT-23-8 pinout (OUT A, –IN A, +IN A, V–, +IN B, –IN B, OUT B, V+), differing from industry-standard dual op-amps like LMV358 or MCP6022. PCB layout must follow Figure 1 in the AD8502 datasheet to avoid functional misconnection.
How does the input bias current of AD8502ARJZ-REEL7 affect high-impedance sensor interfaces?
With 1 pA typical input bias current, AD8502ARJZ-REEL7 introduces <1 mV error when interfacing with 1 GΩ sources (e.g., glass pH electrodes), far below typical sensor signal levels. This eliminates the need for guard rings or T-network compensation-reducing PCB complexity and cost in precision electrochemical measurement systems.
AD8502ARJZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.004V/µs
- Gain Bandwidth Product:
- 7 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 750nA (x2 Channels)
- Current - Output / Channel:
- 5 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
AD8502ARJZ-REEL7 FAQ
1.How can I place an order for AD8502ARJZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8502ARJZ-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 AD8502ARJZ-REEL7 reliable?
The price and inventory of AD8502ARJZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8502ARJZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD8502ARJZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8502ARJZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8502ARJZ-REEL7?
AD8502ARJZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8502ARJZ-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 AD8502ARJZ-REEL7?
For technical support, including AD8502ARJZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8502ARJZ-REEL7 requirements.
6.How does Aetrix verify that AD8502ARJZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD8502ARJZ-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 AD8502ARJZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD8502ARJZ-REEL7?
All AD8502ARJZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8502ARJZ-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 AD8502ARJZ-REEL7 part is unused and in its original packaging.
Return procedure for AD8502ARJZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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