Part A
AD8534AR
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6062 Stückzahl
- Package
- SOP-14
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
Replacement verdict
Not a drop-in replacement
The AD8534AR and AD8531AR-REEL are not drop-in replacements for each other. The AD8534AR is a quad-channel operational amplifier, while the AD8531AR-REEL is a single-channel device, so the channel count, package pinout, and board footprint differ fundamentally. Designers must redesign the circuit layout and verify channel requirements before considering either part as a substitute for the other.
Different channel count
Different package pinout
Different footprint
Different board layout required
Parts at a glance
Part B
AD8531AR-REEL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 9168 Stückzahl
- Package
- SOIC-8
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8534AR | AD8531AR-REEL | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 4 (Quad) | 1 (Single) | Determines how many independent op-amp channels are available in one package; a quad cannot directly replace a single in a one-channel circuit without layout changes. |
| Supply Voltage Range | 2.7 V to 6 V | 2.7 V to 6 V | Both operate over the same single-supply range, so power-rail compatibility is preserved when substituting. |
| Gain Bandwidth Product | 3 MHz | 3 MHz | Matching bandwidth ensures similar AC signal handling and closed-loop stability for the same circuit topology. |
| Slew Rate | 5 V/µs | 5 V/µs | Identical slew rate means comparable large-signal transient response and distortion behavior. |
| Input Offset Voltage (max) | 25 mV | 25 mV | Same offset spec preserves DC accuracy and error budget in precision-sensitive applications. |
| Input Bias Current | 1 pA (typ) | 1 pA (typ) | Very low CMOS input bias current keeps errors small in high-impedance sensor and feedback networks. |
| Output Current Capability | ±250 mA | ±250 mA | High output drive allows direct driving of heavier loads such as headphones or small actuators. |
| Package Type | 14-Lead SOIC | 8-Lead SOIC | Different package footprints and pin counts require PCB layout changes; they are not drop-in replacements. |
| Quiescent Supply Current (per amplifier) | ~0.75 mA/amp (typ) | ~0.75 mA/amp (typ) | Per-amplifier current is similar, but total device current scales with channel count, affecting overall power budget. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8534AR | AD8531AR-REEL |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Obsolete | Obsolete |
| Amplifier Type | General Purpose | General Purpose |
| Number of Circuits | 4 | 1 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 5V/µs | 5V/µs |
| Gain Bandwidth Product | 3 MHz | 3 MHz |
| Current - Input Bias | 5 pA | 5 pA |
| Voltage - Input Offset | 25 mV | 25 mV |
| Supply Current | 750µA (x4 Channels) | 750µA |
| Current - Output / Channel | 250 mA | 250 mA |
| Voltage - Supply Span(Min) | 2.7 V | 2.7 V |
| Voltage - Supply Span(Max) | 6 V | 6 V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the main differences between the AD8534AR and AD8531AR-REEL?
The AD8534AR is a quad-channel operational amplifier supplied in a 14-lead SOIC package, while the AD8531AR-REEL is a single-channel operational amplifier supplied in an 8-lead SOIC package on tape and reel. Both are members of the Analog Devices AD8531/AD8532/AD8534 family and share the same core amplifier design, but they differ in channel count, package pinout, and packaging format.
Do the AD8534AR and AD8531AR-REEL share the same electrical performance specifications?
Yes. The AD8531, AD8532, and AD8534 are based on the same amplifier core, so the per-channel specifications are common across the family. Both devices feature a 3 MHz gain bandwidth product, 5 V/µs slew rate, rail-to-rail input and output, and operation from a single 2.7 V to 6 V supply (or ±1.35 V to ±3 V dual supply). The AD8534AR simply integrates four such amplifiers in one package, while the AD8531AR-REEL contains one.
Can the AD8531AR-REEL be used as a drop-in replacement for one channel of the AD8534AR?
Functionally, one AD8531AR-REEL amplifier is equivalent to one channel of the AD8534AR, but a direct drop-in replacement is not possible because the packages and pinouts differ. The AD8534AR uses a 14-lead SOIC pinout for four amplifiers, whereas the AD8531AR-REEL uses an 8-lead SOIC pinout for a single amplifier. PCB layout changes are required to substitute one for the other.
What supply voltage range do the AD8534AR and AD8531AR-REEL support?
Both devices operate from a single supply of 2.7 V to 6 V, or from dual supplies of ±1.35 V to ±3 V. This rail-to-rail input and output capability makes them suitable for low-voltage, single-supply signal conditioning applications.
What are the package and pin count differences between the AD8534AR and AD8531AR-REEL?
The AD8534AR is offered in a 14-lead SOIC package (often denoted SOIC-14) to accommodate four operational amplifiers. The AD8531AR-REEL is offered in an 8-lead SOIC package (SOIC-8) for a single operational amplifier and is supplied in tape-and-reel format for automated assembly. The "AR" suffix in both part numbers denotes the SOIC package option from Analog Devices.
Are the AD8534AR and AD8531AR-REEL suitable for the same types of applications?
Both are general-purpose, rail-to-rail CMOS operational amplifiers suited to low-voltage signal conditioning, sensor interfacing, active filtering, and portable instrumentation. The AD8534AR is preferable where multiple amplifier channels are needed in a compact footprint, while the AD8531AR-REEL is suited to single-channel designs and automated high-volume assembly via tape and reel.
What is the significance of the "REEL" suffix on the AD8531AR-REEL?
The "REEL" suffix indicates that the AD8531AR devices are supplied on tape and reel packaging, which is intended for automated pick-and-place assembly lines. The AD8534AR part number as specified does not carry a reel designation, so packaging format should be confirmed against the manufacturer's ordering guide before production planning.