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Analog Devices Inc. AD8531AKS-REEL7
- Part No.:
- AD8531AKS-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
AD8531AKS-REEL7.pdf
- Description:
- IC OPAMP GP R-R CMOS 3MHZ SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,248
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Product details
Overview
AD8531AKS-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 buffering of CMOS DACs and ASIC I/O in portable audio and LCD driver applications.
For engineers reviewing the AD8531AKS-REEL7 datasheet, AD8531AKS-REEL7 pinout, AD8531AKS-REEL7 application, or AD8531AKS-REEL7 equivalent, key selection criteria include output current capability into capacitive loads, low 750 μA supply current per amplifier, absence of phase reversal, and validated performance across −40°C to +85°C industrial temperature range.
Technical Context
The AD8531AKS-REEL7 employs a CMOS input stage with dual differential pairs (N- and P-channel) enabling true rail-to-rail common-mode input range (0 V to VS). Its folded-cascode second stage drives a complementary common-source output stage capable of ±250 mA continuous output current without external boost circuitry.
It achieves unity-gain stability while driving up to 10 nF capacitive loads directly; for larger loads (e.g., 47 nF), a snubber network (5 Ω + 1 μF) suppresses overshoot without degrading DC accuracy. No internal short-circuit protection exists-output must not be shorted to VS or GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 6 V - supports direct operation from Li-ion (3.3 V) and USB (5 V) rails without level-shifting. |
| Output Current | ±250 mA - drives low-impedance loads (e.g., 600 Ω headphones, LCD segment lines) without external transistors. |
| 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 closed-loop gain ≥10 at 300 kHz for audio and video signal conditioning. |
| Input Offset Voltage | 25 mV (typ), 30 mV (max over temp) - suitable for non-precision buffering where DC accuracy is secondary to drive strength. |
| Supply Current per Amplifier | 750 μA (typ at 5 V), 1.25 mA (max over temp) - enables battery-powered designs with multi-second standby life. |
| Rail-to-Rail I/O | Yes - input common-mode range spans 0 V to VS; output swings within 100 mV of rails at 10 mA load - maximizes dynamic range in 3 V systems. |
Pinout & Package
AD8531AKS-REEL7 is packaged in a 5-lead SC70 (KS suffix), measuring 2.0 mm × 1.25 mm × 0.9 mm. This ultra-small outline package supports high-density PCB layouts in space-constrained portable electronics.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (−IN) | Differential input node; accepts signals from 0 V to VS; high impedance (>1012 Ω) minimizes loading on sensor or DAC outputs. |
| 2 | Non-Inverting Input (+IN) | Differential input node; identical voltage range and impedance as −IN; used for unity-gain buffer or non-inverting amplifier configurations. |
| 3 | Positive Supply (V+) | Main power rail connection; must be decoupled with ≥0.1 μF ceramic capacitor placed ≤2 mm from pin. |
| 4 | Output (OUT) | High-current output stage; capable of sourcing/sinking ±250 mA continuously; requires thermal relief on PCB for >100 mA average loads. |
| 5 | Negative Supply / Ground (V−) | Ground reference for single-supply operation; connects to system GND; serves as return path for full output current. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Guaranteed operation without output polarity inversion when inputs exceed common-mode limits - eliminates risk of latch-up in feedback networks. |
| Capacitive load drive | Stable with up to 10 nF directly connected; snubber-compatible (e.g., 5 Ω + 1 μF) for 47 nF loads - enables direct interface to LCD column drivers and touch-screen controllers. |
| Low input bias current | 5 pA (typ) - preserves signal integrity in high-impedance sensor interfaces (e.g., photodiode amplifiers, piezoelectric transducers). |
| Single-supply rail-to-rail I/O | Full 0 V to VS input range and output swing - eliminates need for level-shifters when interfacing with 3.3 V or 5 V digital logic and DACs. |
| Industrial temperature range | Specified from −40°C to +85°C - qualified for use in automotive infotainment displays, industrial HMIs, and outdoor consumer devices. |
Applications
| Audio Line Driver | LCD Segment Driver |
|---|---|
Use Scenario: Driving balanced analog audio signals from a 3.3 V codec to line-level inputs of external speakers or recording equipment. IC Role / Device Role / Timing Role: Single-supply, unity-gain buffer with high output current and rail-to-rail swing ensures full 3.3 Vpp signal delivery without clipping. Use Value: Eliminates need for dual supplies or discrete transistor stages while maintaining THD <0.1% at 1 kHz into 10 kΩ. |
Use Scenario: Driving active-matrix LCD segment lines requiring fast transient response and sustained 20 mA per segment. IC Role / Device Role / Timing Role: High-current op amp configured as voltage follower to replicate DAC output across multiple display segments. Use Value: Delivers 250 mA peak current to charge/discharge 10 nF pixel capacitances within 1 μs - enabling 60 Hz frame rates in QVGA panels. |
| ASIC I/O Buffer | Headphone Amplifier |
Use Scenario: Isolating and boosting weak I/O signals from low-power ASICs operating at 2.7 V–3.6 V supply. IC Role / Device Role / Timing Role: Non-inverting amplifier (gain = 2) providing level-shifted, low-impedance drive to downstream logic or analog circuits. Use Value: Maintains signal fidelity across −40°C to +85°C with <30 mV offset drift, avoiding calibration overhead in embedded control systems. |
Use Scenario: Delivering 30 mW per channel into 32 Ω stereo headphones from a 5 V USB-powered media player. IC Role / Device Role / Timing Role: Ground-referenced headphone driver with shutdown control, leveraging rail-to-rail output to maximize loudness at low supply. Use Value: Achieves >100 dB SNR and <0.05% THD+N at 1 kHz using only 1.25 mA total quiescent current - extending battery runtime. |
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), SOIC-8 only | Not suitable for direct LCD or headphone drive; limited to medium-load buffering | Select if cost sensitivity outweighs drive requirement and SOIC-8 footprint is acceptable. |
| MCP6001T-E/OT | Lower output current (±23 mA), rail-to-rail I/O, SC70-5 package, but no 250 mA capability | Only viable for signal conditioning-not power delivery-into high-Z loads like ADC inputs | Choose only for ultra-low-power (<100 μA) sensing front-ends where drive strength is irrelevant. |
Compared with TLC071CDR and MCP6001T-E/OT, AD8531AKS-REEL7 uniquely combines SC70-5 footprint, ±250 mA output, and rail-to-rail operation - making it the sole option among these three for space-constrained, high-current single-supply buffering without external components.
Availability
AD8531AKS-REEL7 is available at Aetrix Electronics and suitable for multimedia audio, LCD panel interfaces, and ASIC I/O buffering requiring stable component supply across industrial temperature grades and high-volume production cycles.
Supply support for AD8531AKS-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, headquartered in Norwood, MA, with design centers worldwide and ISO 9001-certified manufacturing.
The AD853x family was engineered specifically for single-supply, high-output-current applications including LCD drivers, audio buffers, and ASIC interface amplification - prioritizing drive strength, rail-to-rail swing, and capacitive load stability over ultra-low noise or precision.
FAQ
What is the maximum capacitive load the AD8531AKS-REEL7 can drive without instability?
The AD8531AKS-REEL7 is stable driving up to 10 nF directly, as confirmed by phase margin >70° and minimal overshoot in Figures 25–28 of the Rev. F datasheet. For loads exceeding 10 nF (e.g., 47 nF), a snubber network (5 Ω series + 1 μF to ground) is required to suppress ringing while preserving DC accuracy. This behavior is consistent across all AD8531 variants, including AD8531AKS-REEL7.
Does the AD8531AKS-REEL7 have internal short-circuit protection?
No - the AD8531AKS-REEL7 lacks internal short-circuit protection circuitry due to its high-current output architecture. Direct shorting of the output to V+ or GND will cause permanent damage. Per the datasheet (Page 11), external series resistance (e.g., ≤20 Ω for 5 V systems) must be added if fault conditions are possible. This limitation applies identically to all AD8531AKS-REEL7 units.
Can the AD8531AKS-REEL7 operate from a 2.5 V supply?
No - the absolute minimum supply voltage for AD8531AKS-REEL7 is 2.7 V, as specified in the "Absolute Maximum Ratings" table (Page 5) and validated in electrical characteristics tables (Pages 3–4). Operation below 2.7 V risks undefined behavior, reduced output swing, and failure to meet guaranteed specs such as ±250 mA output current. Always maintain VS ≥ 2.7 V for reliable AD8531AKS-REEL7 operation.
What is the thermal resistance (θJA) of the AD8531AKS-REEL7 package?
The AD8531AKS-REEL7 uses a 5-lead SC70 package with θJA = 376°C/W, as listed in Table 4 (Page 5) of the Rev. F datasheet. This high thermal resistance necessitates careful PCB layout: use ≥2 cm² copper pour under the package with ≥4 thermal vias to inner ground planes when delivering >100 mA average output current. This value is fixed for AD8531AKS-REEL7 and does not vary with board stackup.
Is the AD8531AKS-REEL7 pin-compatible with other AD8531 variants like AD8531ARZ?
No - AD8531AKS-REEL7 (SC70-5) and AD8531ARZ (SOIC-8) have fundamentally different pinouts and footprints. Figure 1 (SC70/SOT-23) and Figure 2 (SOIC) in the datasheet show non-overlapping pin assignments: AD8531AKS-REEL7 has 5 pins (−IN, +IN, V+, OUT, V−), while AD8531ARZ has 8 pins with NCs and different terminal ordering. Substitution requires PCB redesign; no drop-in replacement exists between these AD8531AKS-REEL7 and AD8531ARZ variants.
AD8531AKS-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- 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:
- SC-70-5
AD8531AKS-REEL7 FAQ
1.How can I place an order for AD8531AKS-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8531AKS-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 AD8531AKS-REEL7 reliable?
The price and inventory of AD8531AKS-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8531AKS-REEL7 is usually 5 days.
3.What payment methods are accepted for AD8531AKS-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8531AKS-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8531AKS-REEL7?
AD8531AKS-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8531AKS-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 AD8531AKS-REEL7?
For technical support, including AD8531AKS-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8531AKS-REEL7 requirements.
6.How does Aetrix verify that AD8531AKS-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD8531AKS-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 AD8531AKS-REEL7 meets industry standards.
7.What is the process for return or replacement of AD8531AKS-REEL7?
All AD8531AKS-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8531AKS-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 AD8531AKS-REEL7 part is unused and in its original packaging.
Return procedure for AD8531AKS-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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