Part A
AD8042AR
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4001 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8042AR and AD8041AR-REEL are both dual-channel high-speed operational amplifiers from Analog Devices sharing the same SOIC-8 package and similar supply voltage ranges, making the AD8042AR a viable functional replacement candidate for the AD8041AR-REEL in many designs. However, designers should validate bandwidth, slew rate, and output drive characteristics against their specific application requirements before committing to a substitution.
Package Type
High match
Channel Count
High match
Supply Voltage Range
Validation required
Bandwidth and Slew Rate
Validation required
Parts at a glance
Part B
AD8041AR-REEL
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 530 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Instrumentation, 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-REEL | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 (Dual) | 1 (Single) | Channel count determines how many independent signal paths can be processed; a dual and single op-amp are not directly interchangeable in a given PCB layout. |
| -3 dB Bandwidth | 160 MHz | 160 MHz | Bandwidth sets the maximum signal frequency the amplifier can handle with acceptable gain; matching bandwidth supports similar high-speed signal fidelity. |
| Slew Rate | 225 V/µs | 160 V/µs | Slew rate limits how fast the output can respond to large signal steps; a lower slew rate can distort fast transients and large-signal waveforms. |
| Supply Voltage Range | 3 V to 12 V | 3 V to 12 V | The supply range defines compatibility with the system power rail; matching ranges allow use in the same voltage domain. |
| Input Offset Voltage (max) | 6 mV | 6 mV | Offset voltage contributes a DC error at the output; similar offsets preserve comparable accuracy in precision signal chains. |
| Quiescent Supply Current per Amplifier | 6.8 mA | 6.8 mA | Quiescent current affects power budget and thermal load; matching per-amplifier current keeps power consumption predictable. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Package and pinout determine board footprint and layout compatibility; identical packages simplify substitution but pin functions differ between single and dual devices. |
| Output Current (typical) | 50 mA | 50 mA | Output drive capability determines the load the amplifier can drive; matching drive supports 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-REEL |
|---|---|---|
| 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-REEL?
The AD8042AR is a dual-channel, voltage-feedback operational amplifier, while the AD8041AR-REEL is a single-channel, high-speed operational amplifier with a disable feature. The AD8042AR is supplied in a tube or tray format, whereas the AD8041AR-REEL is supplied on a 7-inch tape-and-reel for automated assembly. Both are manufactured by Analog Devices in an 8-lead SOIC package.
Are the AD8042AR and AD8041AR-REEL pin-compatible?
No. The AD8042AR is a dual op-amp with both amplifiers populated in the 8-lead SOIC pinout, while the AD8041AR-REEL is a single op-amp that uses the same 8-lead SOIC footprint but assigns pins to a disable function and different feedback nodes. They cannot be interchanged without verifying the pin functions against the respective datasheets.
What are the key AC specifications of the AD8042AR?
The AD8042AR offers a -3 dB bandwidth of 160 MHz (G = +1), a slew rate of 225 V/µs, and a settling time of 30 ns to 0.1% for a 2 V step. These parameters are specified in the Analog Devices AD8042 datasheet and are valid for the SOIC package at 25°C with ±5 V supplies.
What are the key AC specifications of the AD8041AR-REEL?
The AD8041AR-REEL provides a -3 dB bandwidth of 160 MHz (G = +1), a slew rate of 160 V/µs, and a settling time of 40 ns to 0.1% for a 2 V step. It also includes a disable pin that reduces supply current to 3.2 mA when asserted. These values are taken from the Analog Devices AD8041 datasheet.
Can the AD8042AR and AD8041AR-REEL operate from the same supply voltage?
Yes. Both devices are specified for operation on dual supplies of ±5 V and single supplies of +5 V to +12 V. The AD8042AR is characterized over the -40°C to +85°C industrial temperature range, and the AD8041AR-REEL is characterized over the same range, per their respective datasheets.
Which part is better suited for a single-channel design with power-down capability?
The AD8041AR-REEL is the appropriate choice because it integrates a TTL-compatible disable pin that places the output in a high-impedance state and reduces quiescent current. The AD8042AR does not include a disable function and is intended for dual-channel signal chains where power-down is not required.
What packaging and ordering differences exist between the two parts?
The AD8042AR is typically ordered in tubes or trays for prototype and low-volume assembly. The AD8041AR-REEL suffix indicates a 7-inch tape-and-reel package containing 1,500 units, which is compatible with automated pick-and-place equipment. Both use the same 8-lead SOIC body but differ in shipping format and channel count.
Are the AD8042AR and AD8041AR-REEL drop-in replacements for each other in existing designs?
No. Because the AD8042AR is a dual amplifier and the AD8041AR-REEL is a single amplifier with a disable pin, the pin functions and external component connections differ. A direct substitution would require re-layout and verification of the feedback network, supply decoupling, and disable-pin logic against the target datasheet.