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Analog Devices Inc. AD8502ARJZ-REEL
- Part No.:
- AD8502ARJZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8
- Datasheet:
-
AD8502ARJZ-REEL.pdf
- Description:
- IC CMOS 2 CIRCUIT SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,322
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Product details
Overview
AD8502ARJZ-REEL 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 battery-powered medical sensors and low-power threshold detection circuits.
For engineers reviewing the AD8502ARJZ-REEL datasheet, AD8502ARJZ-REEL pinout, AD8502ARJZ-REEL application, or AD8502ARJZ-REEL equivalent, key selection criteria include ultra-low quiescent current, guaranteed rail-to-rail swing at 1.8 V, industrial-extended temperature range (−40°C to +125°C), and absence of phase reversal under overdrive conditions.
Technical Context
The AD8502ARJZ-REEL implements a CMOS input stage with 1 pA typical input bias current and rail-to-rail differential input voltage range (0 V to VS), enabling accurate sensing near supply rails. Its unity-gain-stable architecture supports stable operation with capacitive loads up to 100 pF without external compensation.
It features no phase reversal behavior - confirmed across full common-mode input range - and maintains ≥75 dB large-signal voltage gain at +125°C. The device achieves 7 kHz gain-bandwidth product and 60° phase margin while consuming ≤2 μA per amplifier at maximum operating temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current/Amplifier | 1 μA max at 25°C; enables >10-year battery life in coin-cell-powered remote sensors |
| Offset Voltage | 3 mV max at 25°C; ensures <±10 mV output error in unity-gain buffer at 5 V supply |
| Input Bias Current | 10 pA typical at 25°C; minimizes voltage drop across high-impedance source networks (>100 MΩ) |
| Rail-to-Rail I/O | Input common-mode range 0 V to VS; output swing within 5 mV of rails at 100 kΩ load - preserves dynamic range at 1.8 V |
| Operating Temperature | −40°C to +125°C; qualified for automotive cabin and industrial ambient environments without derating |
| Gain Bandwidth Product | 7 kHz; sufficient for DC-coupled sensor amplification and low-frequency filtering (e.g., <100 Hz ECG front-end) |
| No Phase Reversal | Guaranteed across full input common-mode range; eliminates latch-up risk in comparator-like overdrive scenarios |
Pinout & Package
AD8502ARJZ-REEL is housed in an 8-lead SOT-23 (RJ-8) package per JEDEC MO-178-BA, with 1.95 mm body width, 0.65 mm lead pitch, and coplanarity ≤0.10 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT A | Amplifier A output | Delivers rail-to-rail sourced/sunk output; drives 100 kΩ load to within 5 mV of VS/GND |
| 2 - –IN A | Inverting input A | High-impedance CMOS node; accepts input down to GND with no phase reversal |
| 3 - +IN A | Non-inverting input A | Same rail-to-rail common-mode range as –IN A; matched input capacitance (2 pF diff, 4.5 pF cm) |
| 4 - V– | Negative supply / ground | Reference for dual-supply operation (±0.9 V to ±2.75 V) or GND in single-supply mode |
| 5 - +IN B | Non-inverting input B | Electrically identical to +IN A; independent channel with matched offset drift (5 μV/°C max) |
| 6 - –IN B | Inverting input B | Independent high-Z node; supports separate feedback networks per channel |
| 7 - OUT B | Amplifier B output | Functionally identical to OUT A; channel separation >60 dB at 1 kHz per Figure 39 |
| 8 - V+ | Positive supply | Accepts 1.8 V to 5.5 V; PSRR ≥85 dB ensures immunity to supply ripple in noisy battery systems |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low power consumption | 1 μA max per amplifier enables multi-year operation on CR2032 cells in portable glucose meters |
| Rail-to-rail input and output | Full 0 V to VS input range and <5 mV output saturation at 100 kΩ load maximize SNR in 1.8 V systems |
| No phase reversal | Eliminates need for external clamping diodes in overvoltage-tolerant sensor interfaces |
| High accuracy without calibration | 3 mV max VOS and 5 μV/°C max drift allow direct use in 12-bit ADC front-ends |
| Extended temperature qualification | Specified from −40°C to +125°C supports deployment in engine bay sensors and industrial PLC modules |
Applications
| Portable Medical Sensors | Low-Power Threshold Detectors |
|---|---|
Use Scenario: Signal conditioning for disposable pulse oximeter probes powered by button cells. IC Role / Device Role / Timing Role: Dual-channel amplifier: Channel A buffers photodiode current; Channel B configures as comparator with hysteresis. Use Value: 1 μA quiescent current extends probe shelf life; rail-to-rail I/O captures full LED/photodiode dynamic range at 3 V. |
Use Scenario: Battery voltage monitor in wireless smoke detectors with 10-year lithium primary cells. IC Role / Device Role / Timing Role: Precision reference buffer and comparator input stage for low-voltage cutoff detection. Use Value: 3 mV max offset ensures accurate 2.7 V trip point; no phase reversal prevents false alarms during brownout transitions. |
| Remote Industrial Sensors | Current Sensing in Energy Harvesters |
Use Scenario: Vibration monitoring node mounted on HVAC motors, powered by energy harvesting. IC Role / Device Role / Timing Role: Low-noise amplifier for piezoelectric sensor output, driving 16-bit SAR ADC. Use Value: 190 nV/√Hz voltage noise density preserves micro-g resolution; 1 pA input bias avoids loading high-Z sensor elements. |
Use Scenario: Shunt-based current measurement in solar-powered IoT gateways with sub-μA sleep modes. IC Role / Device Role / Timing Role: High-side current sense amplifier with gain-setting resistors and rail-to-rail output. Use Value: Input common-mode range includes VS allows direct high-side sensing; 1 μA supply current avoids draining harvester storage capacitors. |
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 | 22 μA supply current; 150 μV max offset; 100 kHz GBW | Better AC performance but 22× higher IQ - unsuitable for >5-year battery life | Select when bandwidth >10 kHz required and power budget allows >20 μA per channel |
| LPV821IDBVR | 320 nA supply current; 1.25 mV max offset; 10 kHz GBW | Lower IQ than AD8502ARJZ-REEL but reduced output drive (10 kΩ min load) | Select for ultra-long-life applications where load impedance ≥10 kΩ and offset <1.25 mV is mandatory |
Compared with ADA4505-2ARMZ and LPV821IDBVR, AD8502ARJZ-REEL uniquely balances sub-μA power, 3 mV offset, rail-to-rail operation at 1.8 V, and robust 100 kΩ output drive - making it optimal for precision, long-life, low-voltage sensor nodes where all four attributes are simultaneously required.
Availability
AD8502ARJZ-REEL is available at Aetrix Electronics and suitable for portable medical devices, remote industrial sensors, and low-power threshold detection circuits requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for AD8502ARJZ-REEL 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The AD8502/AD8504 family was designed specifically for ultra-low-power, precision signal acquisition in battery-constrained applications - emphasizing micropower operation without sacrificing dc accuracy or rail-to-rail functionality.
FAQ
What is the maximum operating supply voltage for AD8502ARJZ-REEL?
The AD8502ARJZ-REEL has an absolute maximum supply voltage rating of 6 V per Table 4. Its specified operating range is +1.8 V to +5.5 V for single-supply use or ±0.9 V to ±2.75 V for dual-supply configurations. Operation beyond 5.5 V risks parametric degradation and is not guaranteed.
Does AD8502ARJZ-REEL support true rail-to-rail input at 1.8 V supply?
Yes. The AD8502ARJZ-REEL guarantees rail-to-rail input common-mode range (0 V to VS) at 1.8 V supply, as confirmed in Table 3 and Figure 27. This allows direct interfacing with sensors whose output spans the full supply range without level-shifting circuitry.
Can AD8502ARJZ-REEL drive a 10 kΩ load at 125°C while maintaining rail-to-rail output?
Yes. At −40°C to +125°C and VS = 5 V, AD8502ARJZ-REEL delivers VOH ≥4.65 V and VOL ≤40 mV into a 10 kΩ load (Table 2), achieving >93% of full-scale swing. At 1.8 V supply, VOH ≥1.65 V and VOL ≤29 mV under same conditions (Table 3).
Is AD8502ARJZ-REEL pin-compatible with other SOT-23 dual op amps like MCP6002?
No. AD8502ARJZ-REEL uses the standard 8-lead SOT-23 pinout (OUT A, –IN A, +IN A, V–, +IN B, –IN B, OUT B, V+), but MCP6002 uses different pin assignments (e.g., V+ on Pin 8, V– on Pin 4). PCB layout must be verified against AD8502ARJZ-REEL's Figure 1 before substitution.
What is the typical input bias current of AD8502ARJZ-REEL at 85°C and 5 V supply?
The typical input bias current of AD8502ARJZ-REEL is 10 pA at 25°C and rises to 100 pA maximum at −40°C to +85°C (Table 2). At +85°C specifically, measured data in Figure 6 shows IB ≈ 30–50 pA for VS = 5 V, well within the 100 pA limit.
AD8502ARJZ-REEL 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-REEL FAQ
1.How can I place an order for AD8502ARJZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8502ARJZ-REEL 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-REEL reliable?
The price and inventory of AD8502ARJZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8502ARJZ-REEL is usually 5 days.
3.What payment methods are accepted for AD8502ARJZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8502ARJZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8502ARJZ-REEL?
AD8502ARJZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8502ARJZ-REEL 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-REEL?
For technical support, including AD8502ARJZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8502ARJZ-REEL requirements.
6.How does Aetrix verify that AD8502ARJZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD8502ARJZ-REEL 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-REEL meets industry standards.
7.What is the process for return or replacement of AD8502ARJZ-REEL?
All AD8502ARJZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD8502ARJZ-REEL, 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-REEL part is unused and in its original packaging.
Return procedure for AD8502ARJZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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