Part A
AD8042AR
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4001 PCS
- Package
- SOIC-8
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8042AR and AD8041AR-REEL7 are both dual-channel high-speed operational amplifiers from Analog Devices sharing the same SOIC-8 package and similar supply and bandwidth characteristics, making the AD8042AR a viable functional replacement candidate for the AD8041AR-REEL7 in many designs. However, differences in slew rate, output drive, and supply current should be validated against the target application before final qualification.
Amplifier Channel Count
High match
Package Type
High match
Slew Rate
Validation required
Supply Current
Validation required
Parts at a glance
Part B
AD8041AR-REEL7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4898 PCS
- Package
- SOIC-8
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8042AR | AD8041AR-REEL7 | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 (Dual) | 1 (Single) | Channel count determines how many independent signal paths can be processed; a dual cannot directly replace a single in a one-channel layout without unused circuitry. |
| -3 dB Bandwidth | 160 MHz | 160 MHz | Bandwidth sets the maximum signal frequency the amplifier can pass with acceptable gain; matching values support similar high-speed signal handling. |
| Slew Rate | 225 V/µs | 160 V/µs | Slew rate limits how fast the output can change; a lower slew rate can distort large fast transients and reduce large-signal bandwidth. |
| Supply Current per Amplifier | 6.0 mA (typ) | 6.0 mA (typ) | Quiescent current affects power budget and thermal design; similar per-amplifier current keeps power consumption comparable. |
| Input Voltage Noise Density | 15 nV/√Hz | 15 nV/√Hz | Noise density impacts the signal-to-noise ratio in low-level signal applications; matching values preserve noise performance. |
| Input Offset Voltage | 1 mV (typ) | 1 mV (typ) | Offset voltage introduces DC error at the output; similar offsets maintain accuracy in precision DC-coupled stages. |
| Supply Voltage Range | 3 V to 12 V | 3 V to 12 V | The allowable supply range determines compatibility with the system power rails; matching ranges allow use in the same supply environment. |
| Package / Pin Count | 8-Lead SOIC | 8-Lead SOIC | Package and pin count affect board footprint and assembly; identical packages simplify physical substitution, though pinout differs between single and dual. |
| Output Current | 50 mA | 50 mA | Output drive capability determines the load the amplifier can drive; matching values support similar load-driving 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 | AD8042AR | AD8041AR-REEL7 |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Obsolete | Obsolete |
| Amplifier Type | Voltage Feedback | Voltage Feedback |
| Number of Circuits | 2 | 1 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 225V/µs | 170V/µs |
| -3 dB Bandwidth | 170 MHz | 170 MHz |
| Current - Input Bias | 1.2 µA | 1.2 µA |
| Voltage - Input Offset | 3 mV | 2 mV |
| Supply Current | 6mA (x2 Channels) | 5.8mA |
| Current - Output / Channel | 50 mA | 50 mA |
| Voltage - Supply Span(Min) | 3 V | 3 V |
| Voltage - Supply Span(Max) | 12 V | 12 V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
| Gain Bandwidth Product | 90 MHz | - |
Frequently asked questions
What are the primary differences between the AD8042AR and AD8041AR-REEL7?
The AD8042AR is a dual-channel, low-power, high-speed operational amplifier, while the AD8041AR-REEL7 is a single-channel version of the same amplifier family. The AD8042AR provides two amplifiers in one package, whereas the AD8041AR-REEL7 contains one amplifier and is supplied in tape-and-reel packaging for automated assembly. Both are fabricated on Analog Devices' proprietary XFCB process and offer similar per-channel AC and DC performance characteristics.
Are the AD8042AR and AD8041AR-REEL7 pin-compatible?
No. The AD8042AR is a dual op-amp in an 8-lead SOIC package, while the AD8041AR-REEL7 is a single op-amp in an 8-lead SOIC package. Although both use the same package footprint, the pin functions differ because the AD8042AR uses the standard dual op-amp pinout (two amplifiers sharing power pins), whereas the AD8041AR-REEL7 uses the standard single op-amp pinout with dedicated null and disable pins. They are not direct drop-in replacements for each other.
What are the key AC specifications of the AD8042AR and AD8041AR-REEL7?
Both devices offer a -3 dB bandwidth of 160 MHz (G = +1) and a slew rate of 200 V/µs. The 0.1% settling time is 30 ns for a 2 V step. These specifications are per-channel and are identical between the single AD8041AR-REEL7 and each channel of the dual AD8042AR, as both are based on the same core amplifier design.
What is the supply voltage range and quiescent current for these amplifiers?
Both the AD8042AR and AD8041AR-REEL7 operate from a single supply of +3 V to +12 V or a dual supply of ±1.5 V to ±6 V. The AD8042AR (dual) draws a typical quiescent current of 10 mA total (5 mA per amplifier), while the AD8041AR-REEL7 (single) draws a typical quiescent current of 5 mA. These values are specified at ±5 V supply.
Does the AD8041AR-REEL7 include a disable feature, and does the AD8042AR have one?
Yes, the AD8041AR-REEL7 includes an active-low disable pin that reduces supply current to approximately 1.5 mA when asserted. The AD8042AR does not have a disable function; both amplifiers in the dual package remain active whenever power is applied. This is a key functional difference to consider when selecting between the two parts.
What are the input offset voltage and input bias current specifications for these parts?
The AD8042AR and AD8041AR-REEL7 both specify a typical input offset voltage of 1 mV (5 mV maximum) and a typical input bias current of 1.5 µA (3.5 µA maximum) at ±5 V supply. These matched DC specifications apply per amplifier and are consistent across both the single and dual versions.
What packaging options are available for the AD8042AR and AD8041AR-REEL7?
The AD8042AR is supplied in an 8-lead SOIC package (designated by the "R" suffix) in tube or standard reel quantities. The AD8041AR-REEL7 is supplied in an 8-lead SOIC package in a 7-inch tape-and-reel format (1,000 units per reel), which is the meaning of the "-REEL7" suffix. Both use the same 8-lead SOIC body but with different pinouts as noted above.
Can the AD8042AR be used to replace two AD8041AR-REEL7 devices in an existing design?
Only if the PCB layout is redesigned. The AD8042AR integrates two amplifiers into one 8-lead SOIC package, which can reduce board space and component count, but its pinout differs from two separate AD8041AR-REEL7 devices. Additionally, the AD8042AR lacks the disable pin found on the AD8041AR-REEL7, so any design relying on that feature cannot use the dual part as a direct substitute without modification.