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 AD8041ARZ-REEL is a viable functional replacement candidate for the AD8042AR in single-channel signal-chain designs, with core AC and DC specifications closely aligned. However, the AD8042AR is a dual-channel device while the AD8041ARZ-REEL is a single-channel device, so channel count and board-level integration must be validated before substitution.
Channel Count
Validation required
Supply Voltage Range
High match
Bandwidth and Slew Rate
High match
Package and Pinout
Validation required
Parts at a glance
Part B
AD8041ARZ-REEL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 9660 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 | AD8041ARZ-REEL | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 (dual) | 1 (single) | Channel count determines whether the part can replace a single or dual op-amp in a given circuit layout; a dual cannot directly substitute for a single without redesign. |
| -3 dB Bandwidth | 160 MHz | 160 MHz | Bandwidth sets the maximum signal frequency the amplifier can handle with acceptable gain; matching values support similar high-speed signal performance. |
| Slew Rate | 225 V/µs | 160 V/µs | Slew rate limits how fast the output can respond to large signal swings; a lower slew rate can distort fast transients and reduce large-signal bandwidth. |
| Supply Voltage Range | 3 V to 12 V | 3 V to 12 V | The supply range must cover the system rail voltages; identical ranges allow operation in the same power environment. |
| Input Offset Voltage (max) | 6 mV | 6 mV | Offset voltage affects DC accuracy; comparable offsets mean similar error contribution in precision signal chains. |
| Quiescent Supply Current per Amplifier | 6.5 mA | 6.5 mA | Quiescent current impacts power budget and thermal design; matching per-amplifier current supports similar power consumption per channel. |
| Output Current (short-circuit) | 50 mA | 50 mA | Output drive capability determines the load the amplifier can drive; equal values indicate similar ability to drive cables or low-impedance loads. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Package footprint and pinout must match for board-level interchangeability; identical packages simplify substitution. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range must cover the application environment; matching ranges ensure equivalent environmental robustness. |
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 | AD8041ARZ-REEL |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Obsolete | Active |
| 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 key differences between the AD8042AR and AD8041ARZ-REEL?
The AD8042AR is a dual-channel, low-power, high-speed operational amplifier, while the AD8041ARZ-REEL is a single-channel, high-speed operational amplifier with a disable feature. The AD8042AR is supplied in an 8-lead SOIC package, whereas the AD8041ARZ-REEL is supplied in an 8-lead SOIC package in tape and reel format. The AD8041ARZ-REEL includes a power-down (disable) pin that reduces supply current when not in use, which the AD8042AR does not provide.
Are the AD8042AR and AD8041ARZ-REEL pin-compatible?
No. The AD8042AR is a dual op amp with both amplifiers' inputs and outputs assigned to the eight SOIC pins, while the AD8041ARZ-REEL is a single op amp that uses one pin for the disable function. The pin functions and assignments differ, so they are not drop-in replacements for each other.
What are the typical supply voltage and supply current specifications for these devices?
Both the AD8042AR and AD8041ARZ-REEL are specified for operation on dual supplies of ±5 V (or single supply of 5 V to 12 V). The AD8042AR typically draws approximately 5.8 mA per amplifier (about 11.6 mA total for the dual), while the AD8041ARZ-REEL typically draws approximately 5.8 mA in normal operation and reduces to a low standby current when the disable pin is asserted.
What is the −3 dB bandwidth of the AD8042AR and AD8041ARZ-REEL?
Both the AD8042AR and AD8041ARZ-REEL provide a −3 dB bandwidth of approximately 160 MHz at a gain of +1 (unity gain) with a ±5 V supply. This makes them suitable for high-speed signal processing, video, and ADC driving applications.
Does the AD8041ARZ-REEL have a power-down feature, and how does it work?
Yes. The AD8041ARZ-REEL includes an active-low disable pin. When the disable pin is pulled low (typically below 0.8 V), the amplifier enters a low-power standby mode, reducing supply current to approximately 0.8 mA. When the pin is left floating or pulled high, the amplifier operates normally. The AD8042AR does not have this feature.
What is the slew rate of the AD8042AR and AD8041ARZ-REEL?
Both the AD8042AR and AD8041ARZ-REEL have a typical slew rate of 160 V/µs. This high slew rate supports fast large-signal response in pulse and video applications.
Can the AD8042AR and AD8041ARZ-REEL be used in single-supply applications?
Yes. Both devices are specified for single-supply operation over a range of 5 V to 12 V, as well as dual-supply operation of ±5 V. Their input common-mode range and output swing are designed to accommodate single-supply signal chains, making them suitable for portable and low-voltage systems.
What are the input offset voltage and input bias current specifications for these amplifiers?
The AD8042AR and AD8041ARZ-REEL both have a typical input offset voltage of 1 mV (5 mV maximum) and a typical input bias current of 1.5 µA (with a maximum of 3.5 µA). These specifications are consistent across both single and dual versions of the AD804x family.