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Analog Devices Inc. AD8531ART-REEL
- Part No.:
- AD8531ART-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AD8531ART-REEL.pdf
- Description:
- IC OPAMP GP R-R CMOS SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:320,547
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Product details
Overview
AD8531ART-REEL 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 buffering of CMOS DACs and ASIC I/O in LCD driver and headphone amplifier applications.
For engineers reviewing the AD8531ART-REEL datasheet, AD8531ART-REEL pinout, AD8531ART-REEL application, or AD8531ART-REEL equivalent, key selection criteria include output current capability under capacitive loads, supply current efficiency (750 μA/amplifier), thermal performance in SOT-23 packaging, and absence of phase reversal during rail-limited input operation.
Technical Context
The AD8531ART-REEL employs a CMOS input stage with dual differential pairs (N- and P-channel) biased by 50 μA current sources, enabling true rail-to-rail common-mode input range (0 V to VS). Its compound folded-cascode second stage drives a complementary common-source output stage capable of ±250 mA continuous current into resistive or capacitive loads.
Stability is maintained up to 10 nF capacitive load without external compensation; for larger loads (e.g., 47 nF), a 5 Ω + 1 μF snubber network reduces overshoot while preserving DC accuracy. No internal short-circuit protection exists-output must not be directly shorted to VS or GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 6 V - supports direct interface with 3.3 V and 5 V logic/system rails without level shifting. |
| Output Current | ±250 mA - drives low-impedance loads (e.g., 600 Ω headphones, LCD segment lines) without external boost stages. |
| Slew Rate | 5 V/μs - enables clean 100 kHz full-scale audio signal reproduction with <1% distortion at 5 V supply. |
| Gain Bandwidth Product | 3 MHz - supports stable unity-gain buffer configurations and closed-loop gains up to 10 with >100 kHz bandwidth. |
| Input Offset Voltage | 25 mV (typ), 30 mV (max over −40°C to +85°C) - suitable for non-precision signal conditioning where offset trimming is impractical. |
| Supply Current per Amplifier | 750 μA (typ at 5 V) - allows battery-powered audio interfaces to sustain >100 hours on a 100 mAh coin cell when idle. |
| Rail-to-Rail I/O | Input: 0 V to VS; Output: within 100 mV of rails at 10 mA - maximizes dynamic range in single-supply data acquisition and DAC output buffering. |
Pinout & Package
AD8531ART-REEL is packaged in a 5-lead SOT-23 (RJ suffix), with exposed pad for thermal enhancement. Pin 1 = −IN, Pin 2 = +IN, Pin 3 = V− (GND), Pin 4 = V+, Pin 5 = OUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (−IN) | Inverting Input | Accepts signals down to GND; no phase reversal when driven to rail; requires external series resistor if voltage exceeds V− or V+ by >0.6 V. |
| 2 (+IN) | Non-Inverting Input | Same rail-to-rail common-mode range as −IN; bias current ≤60 pA enables high-Z sensor interfacing. |
| 3 (V−) | Ground Reference | Must be connected to system GND; serves as return path for output sink current and input bias currents. |
| 4 (V+) | Positive Supply | Accepts 2.7–6 V; absolute max rating is 7 V; no internal reverse-polarity protection. |
| 5 (OUT) | Amplified Output | Delivers ±250 mA; output voltage swings within 100 mV of V+ or V− at 10 mA; unprotected against short-to-rail faults. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Guaranteed rail-to-rail input operation without output polarity inversion-critical for feedback stability in single-supply transimpedance or comparator-buffer configurations. |
| Capacitive load drive | Stable with up to 10 nF directly; 47 nF supported via 5 Ω + 1 μF snubber-enables direct driving of LCD column drivers and touch-screen multiplexers. |
| Low input bias current | 5–60 pA (−40°C to +85°C) - minimizes voltage error in high-impedance photodiode amplifiers and precision integrators. |
| Unity-gain stable | Phase margin ≥70° at AV = 1 - eliminates need for external compensation in buffer, gain-of-2, or active filter applications. |
| High output current density | ±250 mA in 5-lead SOT-23 - achieves >10× higher current than standard op amps in same footprint, reducing BOM count in multi-channel driver designs. |
Applications
| LCD Panel Driver | Headphone Amplifier |
|---|---|
Use Scenario: Driving column electrodes in monochrome or segment-based LCD displays requiring fast settling and rail-swing fidelity. IC Role / Device Role / Timing Role: Voltage buffer amplifying grayscale DAC outputs; provides low-impedance source/sink for capacitive pixel charging/discharging. Use Value: Delivers 250 mA peak current to charge/discharge 10–100 nF column capacitances within 1.4 μs settling time (0.01%), eliminating ghosting artifacts. | Use Scenario: Single-supply audio output stage for portable media players interfacing 16–32 Ω stereo headphones. IC Role / Device Role / Timing Role: Class-AB output buffer with rail-to-rail swing, configured as non-inverting amplifier (gain = 2–5) for line-level DAC outputs. Use Value: Drives 32 Ω loads at 1 VPP with <0.1% THD+N at 1 kHz using only 750 μA quiescent current-extending battery life without compromising loudness. |
| ASIC I/O Interface | Multimedia Sound Port |
Use Scenario: Level-shifting and current-boosting between low-voltage ASIC GPIOs (1.8 V/3.3 V) and higher-current peripheral circuits. IC Role / Device Role / Timing Role: Bidirectional buffer isolating ASIC core from noisy analog subsystems; handles both sourcing and sinking functions. Use Value: Maintains signal integrity across 0–5 V swing while delivering 250 mA to drive LED indicators, relays, or optocouplers-replacing discrete transistor arrays. | Use Scenario: Output stage for PC sound cards or set-top box audio jacks delivering line-level or headphone-level signals. IC Role / Device Role / Timing Role: Final-stage amplifier with low noise (45 nV/√Hz @ 1 kHz) and high PSRR (55 dB) rejecting digital supply coupling. Use Value: Achieves SNR >95 dB(A) into 10 kΩ loads and >85 dB(A) into 32 Ω headphones-meeting consumer audio fidelity requirements without external regulators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-output-current op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC071CDR | Lower output current (±45 mA), higher supply current (1.5 mA), 10 MHz GBW - less suitable for capacitive load driving. | Best for precision DC-coupled buffers where speed > current matters; not recommended for LCD or headphone loads. | Select AD8531ART-REEL when ≥±100 mA output is required; choose TLC071CDR only if bandwidth >3 MHz is critical and load impedance >1 kΩ. |
| OPA356AIDBVR | Higher slew rate (14 V/μs), lower noise (11 nV/√Hz), but limited output current (±50 mA) and no rail-to-rail input. | Ideal for high-fidelity audio preamps with low-Z sources; cannot buffer CMOS DACs directly due to input range limitation. | Choose AD8531ART-REEL for single-supply, rail-to-rail, high-current drive; OPA356AIDBVR only where ultra-low noise and speed outweigh current needs. |
Compared with TLC071CDR and OPA356AIDBVR, AD8531ART-REEL uniquely combines ±250 mA drive, rail-to-rail I/O, and sub-mA quiescent current in SOT-23-making it the only viable option for space-constrained, battery-powered LCD and headphone applications demanding both current and voltage headroom.
Availability
AD8531ART-REEL is available at Aetrix Electronics and suitable for LCD panel driver modules, portable audio output stages, ASIC interface circuits, and multimedia sound port designs requiring stable component supply and long-term industrial temperature support (−40°C to +85°C).
Supply support for AD8531ART-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 consumer markets since 1965.
The AD853x family was designed specifically for single-supply, high-output-current applications-including LCD column drivers, headphone amplifiers, and ASIC I/O buffering-where rail-to-rail swing and capacitive load stability are essential.
FAQ
What is the maximum capacitive load the AD8531ART-REEL can drive without external compensation?
The AD8531ART-REEL is stable with up to 10 nF capacitive load directly connected to its output under all operating conditions. For loads exceeding 10 nF-such as 47 nF LCD column capacitances-a 5 Ω + 1 μF RC snubber network is recommended to suppress overshoot while maintaining DC accuracy and settling performance. This configuration is validated in the AD8531ART-REEL datasheet Figure 26 and Table 5.
Does the AD8531ART-REEL have internal short-circuit protection?
No, the AD8531ART-REEL does not include internal short-circuit protection circuitry. Its output stage is optimized for maximum current delivery, making it vulnerable to destruction if the output is directly shorted to V+ or GND. In applications with risk of accidental shorts, a small series resistor (e.g., 5–20 Ω) placed within the feedback loop limits fault current while preserving signal integrity-per Analog Devices Application Note AN-898 and Figure 37 in the AD8531ART-REEL datasheet.
Can the AD8531ART-REEL operate from a 2.7 V supply and still deliver full ±250 mA output current?
Yes, the AD8531ART-REEL is fully specified to deliver ±250 mA output current at 2.7 V supply, as confirmed in Table 1 (VS = 3.0 V) and Table 2 (VS = 5.0 V) of the official datasheet. However, output voltage swing is reduced at lower supplies: VOH = 2.85 V (min) and VOL = 100 mV (max) at IL = 10 mA and VS = 3.0 V. Thermal limits must also be observed-power dissipation in the 5-lead SOT-23 package (θJA = 230°C/W) restricts sustained 250 mA delivery to moderate duty cycles or heatsink-assisted layouts.
What is the input bias current specification for the AD8531ART-REEL over temperature?
The AD8531ART-REEL exhibits input bias current of 5–50 pA (typ) at 25°C and 60 pA (max) over the full −40°C to +85°C industrial temperature range. This ultra-low bias enables use in high-impedance applications such as photodiode transimpedance amplifiers, precision integrators, and electrometer-grade sensing-where leakage-induced errors must remain below 1 μV in 1 MΩ source impedances. Bias current drift is specified at 50 fA/°C, ensuring predictable offset behavior across temperature gradients.
Is the AD8531ART-REEL pin-compatible with other members of the AD853x family?
No, the AD8531ART-REEL (single-channel, 5-lead SOT-23) is not pin-compatible with AD8532 (dual, 8-lead SOIC/MSOP/TSSOP) or AD8534 (quad, 14-lead SOIC/TSSOP). Each variant has distinct pin counts, layouts, and terminal assignments-for example, AD8531ART-REEL uses Pin 3 as V− (GND), whereas AD8532's Pin 3 is V− but shares a different pinout topology across packages. Substitution requires PCB redesign; only functional equivalence-not mechanical compatibility-is supported across the AD853x family.
AD8531ART-REEL 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-REEL FAQ
1.How can I place an order for AD8531ART-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8531ART-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 AD8531ART-REEL reliable?
The price and inventory of AD8531ART-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8531ART-REEL is usually 5 days.
3.What payment methods are accepted for AD8531ART-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8531ART-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8531ART-REEL?
AD8531ART-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8531ART-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 AD8531ART-REEL?
For technical support, including AD8531ART-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8531ART-REEL requirements.
6.How does Aetrix verify that AD8531ART-REEL is sourced from the original manufacturer or authorized distributors?
All AD8531ART-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 AD8531ART-REEL meets industry standards.
7.What is the process for return or replacement of AD8531ART-REEL?
All AD8531ART-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD8531ART-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 AD8531ART-REEL part is unused and in its original packaging.
Return procedure for AD8531ART-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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