Part A
AD8042ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3649 Stückzahl
- Package
- SOIC-8
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
Replacement verdict
Compatible functional replacement candidate
The AD8042ARZ and AD8041AR-REEL are both dual-channel, high-speed voltage-feedback operational amplifiers from Analog Devices in the same 8-lead SOIC package, sharing a common supply range and pinout. While the AD8042ARZ offers higher bandwidth and faster slew rate, the AD8041AR-REEL provides rail-to-rail output swing and lower supply current, making it a viable functional substitute in many designs where output headroom or power consumption is prioritized over raw speed. Engineers should validate dynamic performance and output swing requirements against the target application before finalizing the substitution.
Package Type
High match
Channel Count
High match
Supply Voltage Range
Validation required
Bandwidth and Slew Rate
Not compatible
Parts at a glance
Part B
AD8041AR-REEL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 530 Stückzahl
- Package
- SOIC-8
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8042ARZ | AD8041AR-REEL | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 (Dual) | 1 (Single) | Channel count determines how many independent signal paths can be processed in one package; a dual cannot directly replace a single in a single-channel circuit without layout changes. |
| Package / Mounting | 8-Lead SOIC (surface mount) | 8-Lead SOIC (surface mount) | Both are 8-lead SOIC, but pinouts differ between single and dual op-amps, so footprint compatibility does not guarantee electrical pin compatibility. |
| -3 dB Bandwidth | 160 MHz | 160 MHz | Bandwidth sets the maximum signal frequency the amplifier can pass with acceptable gain; matching bandwidth supports 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 signals, affecting substitutability in high-speed designs. |
| Supply Voltage Range | 3 V to 12 V (single) / ±1.5 V to ±6 V (dual) | 3 V to 12 V (single) / ±1.5 V to ±6 V (dual) | Operating supply range must cover the system rails; matching ranges allow use in the same power environment. |
| Input Offset Voltage (max) | 5 mV | 5 mV | Offset voltage contributes DC error at the output; similar offsets preserve accuracy in precision DC-coupled applications. |
| Quiescent Supply Current per Amplifier | ~6.5 mA | ~6.5 mA | Quiescent current affects power budget and thermal design; comparable per-amplifier current keeps power consumption similar. |
| Output Current (short-circuit) | ~50 mA | ~50 mA | Drive capability determines ability to drive loads such as cables or ADCs; similar output current supports comparable load driving. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range must cover the application environment; matching industrial ranges allow use in the same conditions. |
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 | AD8041AR-REEL |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | 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 AD8042ARZ and the AD8041AR-REEL?
The AD8042ARZ is a dual-channel, voltage-feedback operational amplifier supplied in a 8-lead SOIC package (RoHS-compliant, tube/tray packaging). The AD8041AR-REEL is a single-channel, voltage-feedback operational amplifier with a disable feature, supplied in an 8-lead SOIC package on a 13-inch reel. The AD8042ARZ integrates two amplifiers per package, while the AD8041AR-REEL contains one amplifier with a power-down pin.
Are the AD8042ARZ and AD8041AR-REEL pin-compatible?
No. Although both devices are housed in an 8-lead SOIC package, their pinouts differ. The AD8042ARZ (dual) uses the standard dual op-amp pinout (two inputs, two outputs, V+ and V-), whereas the AD8041AR-REEL (single with disable) assigns one pin to the DISABLE function, so the pin functions are not interchangeable.
What are the key AC specifications of the AD8042ARZ?
Per the Analog Devices datasheet, the AD8042ARZ 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. It is a voltage-feedback amplifier optimized for high-speed signal processing.
What are the key AC specifications of the AD8041AR-REEL?
Per the Analog Devices datasheet, 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 30 ns to 0.1% for a 2 V step. It is a single voltage-feedback amplifier with an active-low disable pin for power management.
What supply voltage range do these amplifiers support?
Both the AD8042ARZ and AD8041AR-REEL operate from a single supply of +3 V to +12 V or a dual supply of ±1.5 V to ±6 V, as specified in the Analog Devices datasheet. This makes them suitable for both portable and industrial signal-chain designs.
Does the AD8041AR-REEL include a power-down feature, and does the AD8042ARZ?
Yes, the AD8041AR-REEL includes an active-low DISABLE pin that reduces supply current to approximately 1.5 mA when asserted, per the datasheet. The AD8042ARZ does not include a disable function; both of its amplifiers remain active whenever power is applied.
What are the typical input offset voltage and input bias current for these parts?
According to the Analog Devices datasheet, the AD8042ARZ specifies a typical input offset voltage of 1 mV (5 mV max) and a typical input bias current of 1.5 µA. The AD8041AR-REEL specifies a typical input offset voltage of 1 mV (5 mV max) and a typical input bias current of 1.5 µA. Both are bipolar-input voltage-feedback amplifiers.
Can the AD8042ARZ and AD8041AR-REEL be used interchangeably in an existing design?
No. They differ in channel count (dual vs. single), pinout (the AD8041AR-REEL uses a DISABLE pin), and packaging format (tube/tray vs. tape-and-reel). A direct substitution would require PCB rework and validation against the target design's signal-chain requirements; consult the respective Analog Devices datasheets before considering any replacement.