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 AD8542ARM-R2 is a functionally compatible replacement candidate for the AD8542AR, sharing the same dual CMOS op-amp core, supply range, and electrical characteristics; the primary distinction is the package format, so PCB footprint validation is required before substitution.
Amplifier Configuration
High match
Supply Voltage Range
High match
Package Type
Validation required
Operating Temperature Range
High match
Parts at a glance
Part B
AD8542ARM-R2
ADI公司
- Lifecycle
- Active
- Stock
- 4608 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-R2 | Why it matters |
|---|---|---|---|
| Package / Mounting Type | 8-Lead SOIC (Surface Mount) | 8-Lead MSOP (Surface Mount) | Different footprint and land pattern; the board must be designed for the specific package, so they are not drop-in replacements for each other. |
| Number of Amplifiers | 2 (Dual) | 2 (Dual) | Channel count must match for functional substitutability in a dual-op-amp circuit. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Both operate over the same single-supply range, so system power design is compatible. |
| Gain Bandwidth Product | 1 MHz | 1 MHz | Determines the maximum signal frequency the amplifier can handle; identical GBW means equivalent AC performance. |
| Input Offset Voltage (Max) | 6 mV | 6 mV | Affects DC accuracy; matching offset specs ensures comparable precision in signal conditioning. |
| Input Bias Current | 1 pA (typ) | 1 pA (typ) | Very low CMOS input bias current suits high-impedance sensor interfaces; identical values preserve input loading behavior. |
| Quiescent Supply Current | 45 µA/amplifier (typ) | 45 µA/amplifier (typ) | Key for battery-powered designs; equal current draw means equivalent power budget impact. |
| Slew Rate | 0.92 V/µs | 0.92 V/µs | Governs large-signal transient response; identical slew rate gives equivalent dynamic behavior. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Confirms both parts are rated for the same environmental conditions, supporting interchangeability in industrial applications. |
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-R2 |
|---|---|---|
| Supplier | - | 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 are the key differences between the AD8542AR and AD8542ARM-R2?
Both devices are dual, rail-to-rail input/output CMOS operational amplifiers from Analog Devices with identical electrical core specifications. The primary difference is package and ordering format: the AD8542AR is supplied in an 8-lead SOIC package, while the AD8542ARM-R2 is supplied in an 8-lead MSOP package and is provided in tape-and-reel packaging (the "-R2" suffix denotes reel quantity/format).
Are the AD8542AR and AD8542ARM-R2 electrically interchangeable?
Yes, from an electrical standpoint both parts share the same datasheet specifications, including supply voltage range of 2.7 V to 5.5 V, rail-to-rail input and output, and typical 1 MHz gain bandwidth. They differ only in package type and shipping format, so electrical performance in a given circuit is equivalent.
Can the AD8542ARM-R2 be used as a drop-in replacement for the AD8542AR on an existing PCB?
Not without layout changes. The AD8542AR uses an 8-lead SOIC footprint, while the AD8542ARM-R2 uses an 8-lead MSOP footprint. The package body dimensions and PCB land patterns differ, so the board must be designed or reworked for the MSOP footprint before substitution.
What is the supply voltage range for both the AD8542AR and AD8542ARM-R2?
Both devices operate from a single supply of 2.7 V to 5.5 V, and they can also be operated from dual supplies within that total range. This makes them suitable for low-voltage, battery-powered, and 3 V/5 V mixed-signal systems.
Do the AD8542AR and AD8542ARM-R2 support rail-to-rail input and output operation?
Yes. Both parts feature rail-to-rail input and rail-to-rail output swing, allowing signal excursions close to both supply rails. This is beneficial in low-voltage designs where maximizing dynamic range is important.
What is the gain bandwidth product of the AD8542AR and AD8542ARM-R2?
Both devices have a typical gain bandwidth product of 1 MHz. This specification is common to the AD8542 family and applies equally to the SOIC (AD8542AR) and MSOP (AD8542ARM-R2) versions.
Why would a designer choose the AD8542ARM-R2 over the AD8542AR?
The AD8542ARM-R2 is typically selected when board space is constrained, because the 8-lead MSOP package occupies less area than the 8-lead SOIC. Its tape-and-reel format also suits high-volume automated assembly. The AD8542AR may be preferred where the larger SOIC package is easier to handle or where an existing SOIC footprint is already in use.
Are the AD8542AR and AD8542ARM-R2 specified over the same temperature range?
Yes. Both versions are specified for the industrial temperature range of -40°C to +125°C, consistent with the AD8542 datasheet. Package type does not change the rated operating temperature range.