Part A
AD8542AR
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 3683 個数
- Package
- MSOP-8
- Series
- リニアアンプ - 計装用、オペアンプ、バッファアンプ
Replacement verdict
Compatible functional replacement candidate
The AD8542ARMZ-REEL and AD8542AR are functionally equivalent CMOS operational amplifiers sharing identical core electrical specifications, with the primary distinction being the RoHS-compliant, tape-and-reel packaging of the ARMZ-REEL variant versus the tube-packaged AR version. Designers can treat them as interchangeable for circuit function, while procurement and assembly teams should confirm package finish and reel format requirements.
Amplifier Core Specifications
High match
Package Type
High match
RoHS Compliance
Validation required
Packaging Format
Not compatible
Parts at a glance
Part B
AD8542ARMZ-REEL
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 5605 個数
- Package
- MSOP-8
- Series
- リニアアンプ - 計装用、オペアンプ、バッファアンプ
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8542ARMZ-REEL | AD8542AR | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 | 2 | Both are dual op-amps, so channel count is functionally equivalent for circuit design. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Identical operating voltage range ensures the parts are interchangeable across the same power rails. |
| Gain Bandwidth Product | 1 MHz | 1 MHz | Same bandwidth means AC performance and signal fidelity are preserved when substituting. |
| Input Offset Voltage (max) | 6 mV | 6 mV | Matching offset voltage ensures DC accuracy is unchanged in precision applications. |
| Input Bias Current | 1 pA (typ) | 1 pA (typ) | Very low bias current is critical for high-impedance sensor and photodiode front-ends; identical values confirm equivalence. |
| Quiescent Current per Amplifier | 45 µA (typ) | 45 µA (typ) | Same supply current keeps power budget and battery life unchanged in portable designs. |
| Package / Mounting | 8-Lead MSOP (Surface Mount), Tape & Reel | 8-Lead SOIC (Surface Mount), Tube | Different package footprints and packaging formats affect PCB layout, assembly, and board space, so they are not drop-in physical substitutes. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +85 °C | The wider industrial temperature range of the ARMZ version matters for harsh-environment applications where the AR version may not be rated. |
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 | AD8542ARMZ-REEL |
|---|---|---|
| Part Status | Obsolete | Active |
| 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 AD8542ARMZ-REEL and AD8542AR?
Both are dual, rail-to-rail input/output operational amplifiers from Analog Devices with the same electrical core specifications. The primary difference is packaging and delivery format: AD8542ARMZ-REEL is supplied in an 8-lead MSOP (RM-8) package in tape-and-reel format for automated assembly, while AD8542AR is supplied in an 8-lead SOIC (R-8) package in tube format. The "Z" suffix in AD8542ARMZ-REEL indicates RoHS-compliant lead-free construction.
Are AD8542ARMZ-REEL and AD8542AR electrically interchangeable?
Yes, both devices share the same dual op-amp core with identical typical specifications, including 1 MHz gain bandwidth product, 0.92 V/µs slew rate, 45 µA per amplifier supply current, and 1 pA input bias current. They differ only in package type and shipping format, so electrical performance in a given circuit is equivalent when the package footprint is accommodated.
What supply voltage range do AD8542ARMZ-REEL and AD8542AR support?
Both devices operate from a single supply of 2.7 V to 5.5 V, and they are also specified for dual-supply operation of ±1.35 V to ±2.75 V. This makes them suitable for battery-powered and low-voltage portable applications.
Can AD8542ARMZ-REEL be used as a drop-in replacement for AD8542AR on an existing PCB?
No, not as a direct drop-in. AD8542ARMZ-REEL uses an 8-lead MSOP package, while AD8542AR uses an 8-lead SOIC package. The package body dimensions and PCB land patterns differ, so the board footprint must be redesigned or an adapter used. Pin functions are equivalent, but physical compatibility requires layout changes.
What is the significance of the "Z" and "REEL" suffixes in AD8542ARMZ-REEL?
The "Z" suffix denotes RoHS-compliant, lead-free construction per Analog Devices nomenclature. The "REEL" suffix indicates the device is shipped in tape-and-reel packaging, which is suited for high-volume automated pick-and-place assembly. AD8542AR, by contrast, is supplied in tube packaging and is not designated with the Z suffix in its base part number.
What are the input bias current and offset voltage characteristics of these amplifiers?
Both AD8542ARMZ-REEL and AD8542AR feature CMOS inputs with a typical input bias current of 1 pA and a typical input offset voltage of 1 mV (6 mV maximum). These characteristics suit high-impedance sensor interfaces and precision low-power signal conditioning.
Are AD8542ARMZ-REEL and AD8542AR suitable for automotive or extended-temperature applications?
The standard AD8542ARMZ-REEL and AD8542AR parts are specified over the industrial temperature range of −40 °C to +125 °C. Automotive-qualified variants are separate orderable part numbers and should not be assumed from these base part numbers; qualification status must be confirmed against the specific manufacturer datasheet and orderable part number.