Part A
AD8542AR
ADI公司
- Lifecycle
- Active
- Stock
- 3683 件
- Package
- MSOP-8
- Series
- 線性放大器-儀器、運算放大器、緩衝放大器
Replacement verdict
Compatible functional replacement candidate
The AD8542AR and AD8542ARM-REEL are functionally equivalent dual operational amplifiers sharing the same core electrical specifications, differing only in package type and delivery format. The AD8542AR in an 8-lead SOIC package and the AD8542ARM-REEL in an 8-lead MSOP package are both valid functional substitutes when board footprint is adjusted accordingly, making the AD8542ARM-REEL a suitable replacement candidate for the AD8542AR in designs that accommodate the MSOP package.
Amplifier Core Specifications
High match
Channel Count and Configuration
High match
Package Type and Footprint
Validation required
Supply Voltage Range
High match
Parts at a glance
Part B
AD8542ARM-REEL
ADI公司
- Lifecycle
- Active
- Stock
- 9158 件
- Package
- TSSOP-8
- Series
- 線性放大器-儀器、運算放大器、緩衝放大器
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8542AR | AD8542ARM-REEL | Why it matters |
|---|---|---|---|
| Amplifier Type | CMOS, Rail-to-Rail Input/Output | CMOS, Rail-to-Rail Input/Output | Both are general-purpose CMOS op-amps with rail-to-rail I/O, so the core signal-conditioning behavior is identical. |
| Number of Channels | 2 | 2 | Channel count must match for pin-compatible substitution in dual-amplifier circuits. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Identical supply range ensures the part works in the same low-voltage systems without redesign. |
| Gain Bandwidth Product | 1 MHz | 1 MHz | Matching bandwidth preserves AC performance and stability in the same feedback networks. |
| Input Offset Voltage (max) | 6 mV | 6 mV | Equal offset limits mean DC accuracy is unchanged when swapping parts. |
| Input Bias Current | 1 pA (typ) | 1 pA (typ) | Very low CMOS input bias current keeps high-impedance sensor and filter circuits behaving the same. |
| Quiescent Current per Amplifier | 45 µA (typ) | 45 µA (typ) | Identical supply current keeps battery-powered designs within the same power budget. |
| Package / Mounting | 8-Lead SOIC (surface mount) | 8-Lead MSOP (surface mount) | Different package footprints require PCB layout changes; the parts are not drop-in replacements for each other. |
| Packaging / Ordering Format | Tube / bulk | Tape and reel | The reel format suits automated high-volume assembly, while tube is typically for prototyping or low-volume runs. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8542AR | AD8542ARM-REEL |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Obsolete | Obsolete |
| Amplifier Type | General Purpose | General Purpose |
| Number of Circuits | 2 | 2 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 0.92V/µs | 0.92V/µs |
| Gain Bandwidth Product | 1 MHz | 1 MHz |
| Current - Input Bias | 4 pA | 4 pA |
| Voltage - Input Offset | 1 mV | 1 mV |
| Supply Current | 45µA (x2 Channels) | 45µA (x2 Channels) |
| Current - Output / Channel | 30 mA | 30 mA |
| Voltage - Supply Span(Min) | 2.7 V | 2.7 V |
| Voltage - Supply Span(Max) | 5.5 V | 5.5 V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the difference between AD8542AR and AD8542ARM-REEL?
Both are dual, rail-to-rail input/output operational amplifiers from Analog Devices. The AD8542AR is supplied in an 8-lead SOIC package, while the AD8542ARM-REEL is supplied in an 8-lead MSOP package and is delivered on a reel for automated assembly. The electrical specifications are the same; the difference is package type and packaging format.
Are the AD8542AR and AD8542ARM-REEL electrically identical?
Yes. Both variants share the same AD8542 die and datasheet specifications, including 1 MHz gain bandwidth, rail-to-rail input and output, and operation from 2.7 V to 5.5 V single supply. Package and reel format are the only differences.
Can the AD8542ARM-REEL be used as a drop-in replacement for the AD8542AR?
Not as a direct drop-in. The AD8542ARM-REEL uses an 8-lead MSOP package, whereas the AD8542AR uses an 8-lead SOIC package. The PCB land pattern and footprint differ, so the board must be designed or reworked for the MSOP package before substitution.
What supply voltage range do both parts support?
Both the AD8542AR and AD8542ARM-REEL operate from a single supply of 2.7 V to 5.5 V, and they are also specified for dual-supply operation within the corresponding total supply range, per the Analog Devices AD8541/AD8542/AD8544 datasheet.
Why is the AD8542ARM-REEL supplied on a reel?
The "-REEL" suffix indicates tape-and-reel packaging, which is intended for high-volume automated pick-and-place assembly. The AD8542AR is typically supplied in tube or tray format for the SOIC package.
Do both variants have the same pinout function?
Yes. Both are 8-lead dual op-amp packages with the standard dual op-amp pinout: OUT A, -IN A, +IN A, V-, +IN B, -IN B, OUT B, and V+. The pin functions are identical; only the package body and land pattern differ.
Which variant should be selected for a new high-volume design?
For high-volume automated assembly, the AD8542ARM-REEL in MSOP tape-and-reel is generally preferred because it occupies less board area and supports reel-fed placement. The AD8542AR in SOIC may be preferred where the larger SOIC footprint is already established or easier to handle.