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Analog Devices Inc. AD8531ART-REEL7
- Part No.:
- AD8531ART-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AD8531ART-REEL7.pdf
- Description:
- IC OPAMP GP R-R CMOS SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:25,825
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Product details
Overview
AD8531ART-REEL7 from Analog Devices is a single-channel, rail-to-rail input/output operational amplifier optimized for high-output-current drive (±250 mA) in single-supply systems (2.7 V to 6 V). It delivers 5 V/μs slew rate, 3 MHz gain bandwidth, and rail-to-rail swing at both inputs and outputs-enabling direct interfacing with CMOS DACs, ASIC I/O, and LCD column drivers in portable audio and display systems.
For engineers reviewing the AD8531ART-REEL7 datasheet, AD8531ART-REEL7 pinout, AD8531ART-REEL7 application, or AD8531ART-REEL7 equivalent, key selection criteria include output current capability under capacitive load, supply current efficiency (750 μA/amplifier), thermal derating at 5-Lead SOT-23 (RJ) package, and absence of phase reversal across full common-mode range.
Technical Context
The AD8531ART-REEL7 employs a CMOS input stage with dual differential pairs (N- and P-channel) biased by 50 μA current sources, enabling true rail-to-rail input operation from 0 V to VS. Its compound folded-cascode second stage drives a complementary common-source output stage capable of ±250 mA into resistive or capacitive loads without external compensation up to 10 nF.
It features no internal short-circuit protection; output fault current must be externally limited. Input bias current remains ultra-low (5–50 pA) across −40°C to +85°C, supporting precision integrator and photodiode amplifier applications where leakage-induced error must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 6 V - supports direct operation from Li-ion battery (3.3 V nominal) or USB-powered 5 V rails without regulation. |
| Output Current | ±250 mA - drives low-impedance loads such as 600 Ω headphones or LCD segment/column lines without external buffers. |
| Slew Rate | 5 V/μs - enables clean 100 kHz full-scale square wave output into 2 kΩ load with <1.4 μs settling to 0.01%. |
| Gain Bandwidth Product | 3 MHz - provides stable unity-gain operation with ≥70° phase margin and supports closed-loop gains up to 10 with >300 kHz bandwidth. |
| Input Bias Current | 5 pA (typ) - ensures <1 mV error in 1 MΩ feedback networks and enables accurate integration over seconds without drift saturation. |
| Rail-to-Rail I/O | Input: 0 V to VS; Output: within 100 mV of rails at 10 mA - eliminates level-shifting circuitry when buffering 0–5 V DAC outputs or ASIC logic interfaces. |
| Quiescent Current | 750 μA per amplifier - allows battery-operated systems to sustain >1000 hours runtime on 100 mAh coin cell while maintaining 250 mA peak drive capability. |
Pinout & Package
The AD8531ART-REEL7 is packaged in a 5-Lead SOT-23 (RJ suffix), with exposed pad for thermal enhancement. Pin 1 is marked via dot; pin numbering follows standard SOT-23 convention (counterclockwise from mark).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier output | Delivers ±250 mA; requires external series resistor if short-circuit risk exists; no internal protection. |
| 2 (−IN) | Inverting input | CMOS input node; accepts 0 V to VS; sensitive to overvoltage >VS + 0.6 V (requires external limiting resistor). |
| 3 (+IN) | Non-inverting input | CMOS input node; same voltage range and overvoltage sensitivity as −IN; low 5 pA bias current enables high-Z sensor interfaces. |
| 4 (V−) | Negative supply / ground | Connected to system ground in single-supply configuration; serves as reference for input common-mode and output swing. |
| 5 (V+) | Positive supply | Accepts 2.7 V to 6 V; absolute max 7 V; power dissipation must be managed per θJA = 230°C/W (SOT-23). |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Guaranteed operation without output polarity inversion even when inputs exceed common-mode range - critical for feedback stability in active filters and regulators. |
| Capacitive load drive | Stable with up to 10 nF directly; overshoot controlled via optional RC snubber (e.g., 5 Ω + 1 μF for 47 nF loads) - enables direct driving of LCD panel capacitance without added isolation stages. |
| Low input bias current | 5 pA typical at 25°C, ≤60 pA over −40°C to +85°C - preserves accuracy in high-impedance transducer amplifiers and long-time-constant integrators. |
| Rail-to-rail output swing | Within 100 mV of rails at 10 mA (VS = 5 V); maintains >4.8 V high-level and <100 mV low-level output - eliminates need for level shifters when interfacing with 3.3 V or 5 V logic. |
| Unity-gain stable | Phase margin ≥70° at unity gain; no external compensation required - simplifies design of voltage followers, active filters, and buffer stages. |
Applications
| Audio Line Driver | LCD Column Driver |
|---|---|
|
Use Scenario: Driving balanced analog audio signals from codec outputs to external speakers or line-level inputs in portable media players. IC Role / Device Role / Timing Role: Single-supply voltage follower with high current delivery and rail-to-rail swing to preserve dynamic range across 0–3.3 V DAC output. Use Value: Delivers 250 mA peak into 32 Ω headphones without clipping, eliminating need for discrete output transistors or dedicated headphone amps. |
Use Scenario: Buffering column electrode signals in monochrome STN or segment-based LCD displays requiring fast settling and high sink/source current. IC Role / Device Role / Timing Role: High-speed, high-current output buffer translating microcontroller GPIO or segment driver IC outputs to LCD column lines. Use Value: Drives up to 10 nF column capacitance with <1.4 μs settling, enabling 120 Hz frame rates in 240-segment displays without external charge pumps. |
| ASIC I/O Interface | Buffered Reference Amplifier |
|
Use Scenario: Level-shifting and current-boosting digital or analog I/O between mixed-voltage ASICs (e.g., 1.8 V core logic to 3.3 V interface bus). IC Role / Device Role / Timing Role: Rail-to-rail input/output op amp configured as non-inverting amplifier or unity-gain buffer for wide-swing ASIC signals. Use Value: Accepts 0–1.8 V input and delivers 0–3.3 V output at 250 mA, enabling direct connection to 3.3 V display drivers or ADC front-ends without discrete level translators. |
Use Scenario: Boosting low-current precision references (e.g., REF196 3.3 V) to drive high-current loads like ADC reference inputs or sensor excitation circuits. IC Role / Device Role / Timing Role: Unity-gain buffer with low offset drift (20 μV/°C) and high PSRR (55 dB) stabilizing reference voltage under varying load conditions. Use Value: Maintains <1 mV error at 100 mA load while rejecting supply ripple - critical for 12-bit+ SAR ADC accuracy in industrial data acquisition modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-output-current, rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TSM103WIDT | Lower output current (±60 mA), wider supply range (3–36 V), BJT input (nA bias), no rail-to-rail output | Preferred for high-voltage industrial sensors; unsuitable for LCD or headphone drive due to limited current and output swing | Select only when >12 V supply or high-temp operation (>105°C) is required; not drop-in for AD8531ART-REEL7 PCBs |
| MCP6001T-E/OT | Lower output current (±23 mA), rail-to-rail I/O, CMOS input (1 pA), higher quiescent current (100 μA) | Targeted at ultra-low-power sensor nodes; insufficient for capacitive loads >1 nF or loads <1 kΩ | Use only in battery-powered IoT endpoints where current budget <100 μA dominates; cannot replace AD8531ART-REEL7 in audio or display roles |
Compared with TSM103WIDT and MCP6001T-E/OT, the AD8531ART-REEL7 uniquely combines ±250 mA drive, rail-to-rail I/O, and sub-1 mA quiescent current - making it the sole option among these three for driving 600 Ω headphones or 10 nF LCD columns from a 3.3 V supply without external components.
Availability
AD8531ART-REEL7 is available at Aetrix Electronics and suitable for multimedia audio subsystems, LCD display interfaces, and ASIC I/O conditioning requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.
Supply support for AD8531ART-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and consumer markets since 1965.
The AD853x family was designed specifically for single-supply, high-output-current applications including LCD drivers, audio buffers, and ASIC interface amplifiers - emphasizing robust capacitive load drive, rail-to-rail operation, and low power consumption.
FAQ
What is the maximum safe output current for AD8531ART-REEL7 in a 5 V, 25°C ambient environment?
The AD8531ART-REEL7 can deliver ±250 mA continuously only if junction temperature remains ≤150°C. In its 5-Lead SOT-23 package (θJA = 230°C/W), continuous 250 mA output at 5 V requires <100 mW total dissipation - limiting practical sustained current to ~100 mA unless board-level thermal management (copper pour, airflow) is implemented. Derate linearly above 25°C ambient per Figure 38.
Does AD8531ART-REEL7 require external compensation when driving a 47 nF capacitive load?
Yes - while the AD8531ART-REEL7 remains stable with up to 10 nF directly, a 47 nF load induces significant overshoot and ringing. Analog Devices recommends a snubber network of 5 Ω in series with 1 μF from output to ground (Figure 40), which reduces overshoot by >70% without affecting DC accuracy or bandwidth below 100 kHz.
Can AD8531ART-REEL7 be used as a replacement for LM358 in existing designs?
No - the AD8531ART-REEL7 is not pin-compatible with LM358 and operates exclusively on single supplies (2.7–6 V), whereas LM358 supports dual supplies and has different pinout (SOIC-8 vs. SOT-23-5). Its rail-to-rail I/O, ±250 mA output, and 5 V/μs slew rate also differ fundamentally from LM358's 20 mA output and 0.6 V/μs slew rate - redesign is required.
What is the input voltage range specification for AD8531ART-REEL7 at 3.3 V supply?
At VS = 3.3 V, the AD8531ART-REEL7 supports rail-to-rail input common-mode voltage from 0 V to 3.3 V (Table 1). This allows direct connection to 3.3 V logic outputs, 3.3 V DACs, or resistive sensor bridges without level shifting - but inputs must not exceed VS + 0.6 V to avoid damaging internal ESD diodes.
Is AD8531ART-REEL7 suitable for driving 600 Ω headphones in a portable device?
Yes - the AD8531ART-REEL7 delivers ±250 mA, enabling >1 V RMS into 600 Ω (≈1.7 mW) with <0.1% THD+N at 1 kHz when powered from 3.3 V or 5 V. Its 750 μA quiescent current minimizes battery drain, and rail-to-rail output ensures full utilization of DAC dynamic range - confirmed in Application Note "Single-Supply Headphone Amplifier" (Page 15).
AD8531ART-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 5V/µs
- Gain Bandwidth Product:
- 3 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 5 pA
- Voltage - Input Offset:
- 25 mV
- Current - Supply:
- 750µA
- Current - Output / Channel:
- 250 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 6 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
AD8531ART-REEL7 FAQ
1.How can I place an order for AD8531ART-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8531ART-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 AD8531ART-REEL7 reliable?
The price and inventory of AD8531ART-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8531ART-REEL7 is usually 5 days.
3.What payment methods are accepted for AD8531ART-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8531ART-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8531ART-REEL7?
AD8531ART-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8531ART-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 AD8531ART-REEL7?
For technical support, including AD8531ART-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8531ART-REEL7 requirements.
6.How does Aetrix verify that AD8531ART-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD8531ART-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 AD8531ART-REEL7 meets industry standards.
7.What is the process for return or replacement of AD8531ART-REEL7?
All AD8531ART-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8531ART-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 AD8531ART-REEL7 part is unused and in its original packaging.
Return procedure for AD8531ART-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD8531ART-REEL7 Tags
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