Part A
AD8042ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3649 PCS
- Package
- SOIC-8
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8041ARZ and AD8042ARZ share the same core voltage-feedback op-amp architecture, supply range, and SOIC-8 package, making them functionally interchangeable in many designs. The primary distinction is channel count: the AD8041ARZ is a single amplifier with a dedicated disable pin, while the AD8042ARZ is a dual amplifier without a disable function. Designers must confirm channel requirements and disable-pin usage before substituting, but the shared electrical characteristics support a viable replacement path.
Channel Count
Not compatible
Package Type
High match
Supply Voltage Range
High match
Disable Function
Validation required
Parts at a glance
Part B
AD8041ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3656 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 | AD8041ARZ | AD8042ARZ | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 1 | 2 | Determines how many independent signal channels are available; a dual amplifier can replace two singles in multi-channel designs. |
| -3 dB Bandwidth | 160 MHz | 160 MHz | Sets the maximum frequency range the amplifier can handle with acceptable gain, critical for high-speed signal processing. |
| Slew Rate | 160 V/µs | 160 V/µs | Indicates how fast the output can respond to large signal changes, affecting large-signal bandwidth and distortion. |
| Supply Voltage Range | 3 V to 12 V | 3 V to 12 V | Defines the operating supply window; matching ranges allow direct substitution in the same power rail design. |
| Input Offset Voltage (max) | 5 mV | 5 mV | Affects DC accuracy; identical offset specs mean comparable precision in DC-coupled applications. |
| Quiescent Supply Current per Amplifier | 6.8 mA | 6.8 mA | Impacts power budget; matching per-amplifier current keeps total power predictable when swapping parts. |
| Output Current | 50 mA | 50 mA | Determines drive capability for loads such as cables or ADC inputs; equal ratings ensure equivalent load driving. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Same package footprint allows drop-in board replacement without layout changes. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Ensures both parts meet the same environmental requirements for industrial and commercial 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 | AD8042ARZ | AD8041ARZ |
|---|---|---|
| Part Status | Active | 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 |
| Gain Bandwidth Product | 90 MHz | - |
| -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 |
Frequently asked questions
What are the key differences between the AD8041ARZ and AD8042ARZ?
The AD8041ARZ is a single-channel, voltage-feedback operational amplifier, while the AD8042ARZ is a dual-channel version of the same amplifier family. Both are specified for a 160 MHz unity-gain bandwidth and operate on a single 3 V to 12 V supply (or ±1.5 V to ±6 V dual supplies), but the AD8042ARZ integrates two independent amplifiers in one package, making it suitable for dual-channel signal chains where board space and channel matching matter.
Are the AD8041ARZ and AD8042ARZ pin-compatible?
No. The AD8041ARZ is supplied in an 8-lead SOIC package with a single amplifier pinout, while the AD8042ARZ is supplied in an 8-lead SOIC package containing two amplifiers. Although both use the same 8-lead SOIC body, the pin functions differ because the AD8042ARZ assigns pins to two separate amplifier channels, so the two devices are not drop-in replacements for each other.
Do the AD8041ARZ and AD8042ARZ share the same supply voltage range?
Yes. Both devices are specified for operation from a single 3 V to 12 V supply or from dual ±1.5 V to ±6 V supplies, per the Analog Devices datasheets. This common supply range allows either part to be used in the same system rail configuration, provided the channel count and pinout requirements are met.
What is the unity-gain bandwidth of the AD8041ARZ and AD8042ARZ?
Both the AD8041ARZ and AD8042ARZ are specified with a 160 MHz unity-gain bandwidth (−3 dB) in the Analog Devices datasheets. The dual AD8042ARZ achieves this per channel, so each amplifier in the dual device retains the same bandwidth specification as the single AD8041ARZ.
Can the AD8042ARZ be used to replace two AD8041ARZ amplifiers?
Functionally, the AD8042ARZ provides two amplifiers with the same core specifications as the AD8041ARZ, so it can often replace two single amplifiers in a design. However, the replacement requires a PCB layout change because the pinout of the 8-lead SOIC dual differs from that of the single, and the designer must verify thermal, crosstalk, and decoupling requirements against the AD8042ARZ datasheet before substituting.
What package do the AD8041ARZ and AD8042ARZ use?
Both devices are offered in an 8-lead SOIC package (the "RZ" suffix denotes the RoHS-compliant SOIC option from Analog Devices). The AD8041ARZ houses one amplifier in this package, while the AD8042ARZ houses two amplifiers in the same 8-lead SOIC body, so package outline dimensions are shared but internal pin assignments differ.
Are the AD8041ARZ and AD8042ARZ RoHS compliant?
Yes. The "Z" suffix in both part numbers indicates the RoHS-compliant package option per Analog Devices ordering information. Designers should confirm the specific orderable part number and its compliance documentation on the manufacturer or authorized distributor listing before finalizing a bill of materials.