Part A
AD8042AR
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 4001 PCS
- Package
- SOIC-8
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
Replacement verdict
Compatible functional replacement candidate
The AD8041ARZ and AD8042AR are both single-supply, rail-to-rail output operational amplifiers from Analog Devices, making the AD8042AR a viable functional replacement candidate for the AD8041ARZ in many applications. However, the AD8042AR is a dual-channel device versus the single-channel AD8041ARZ, so designers must account for the additional channel, differing pinout, and package footprint before substituting. Verify supply voltage, bandwidth, and load conditions against the target circuit to confirm suitability.
Amplifier Type
High match
Channel Count
Validation required
Package Type
Validation required
Supply Voltage Range
High match
Parts at a glance
Part B
AD8041ARZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 3656 PCS
- Package
- SOIC-8
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
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 | AD8042AR | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 1 | 2 | Determines how many independent signal channels can be processed in one package; a dual device can replace two singles but not vice versa. |
| Package / Mounting Type | 8-Lead SOIC (surface mount) | 8-Lead SOIC (surface mount) | Both share the same SOIC-8 footprint, but pinout differs between single and dual op-amps, so board layout compatibility must be checked. |
| -3 dB Bandwidth | 160 MHz | 160 MHz | Sets the maximum usable signal frequency; matching bandwidth means similar high-frequency performance for video and fast signal paths. |
| Slew Rate | 160 V/µs | 160 V/µs | Governs how fast the output can respond to large signal steps; identical slew rate supports comparable transient and pulse performance. |
| 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) | Defines the allowable power supply; matching ranges allow the parts to operate in the same system rails. |
| Input Offset Voltage (max) | 5 mV | 5 mV | Affects DC accuracy; equal offset specs mean similar precision for DC-coupled and low-level signal applications. |
| Quiescent Supply Current per Amplifier | 5.8 mA | 5.8 mA | Impacts power budget; per-amplifier current is comparable, though the dual device draws roughly twice the total package current. |
| Output Current (short-circuit) | 50 mA | 50 mA | Indicates drive capability for loads such as cables and capacitive lines; matching values support similar load-driving behavior. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Confirms both parts are rated for the same industrial temperature environment, supporting interchangeability in harsh conditions. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8042AR | AD8041ARZ |
|---|---|---|
| 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 |
| 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 AD8042AR?
The AD8041ARZ is a single-channel, voltage-feedback operational amplifier in an 8-lead SOIC package, while the AD8042AR is a dual-channel version of the same amplifier family in an 8-lead SOIC package. Both offer 160 MHz unity-gain bandwidth and 160 V/µs slew rate, but the AD8042AR integrates two independent amplifiers in one package, making it suitable for dual-channel signal chains where board space is limited.
Are the AD8041ARZ and AD8042AR pin-compatible?
No. The AD8041ARZ is a single amplifier with a standard single op-amp pinout (including null pins), while the AD8042AR is a dual amplifier with a dual op-amp pinout. The pin functions and PCB land patterns differ, so they are not direct drop-in replacements for each other.
Do both devices share the same supply voltage range?
Yes. Both the AD8041ARZ and AD8042AR 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 datasheets for the AD8041 and AD8042 families.
What is the unity-gain bandwidth of the AD8041ARZ and AD8042AR?
Both devices provide a unity-gain bandwidth of 160 MHz, allowing them to support high-speed signal processing and video applications. This parameter is verified in the respective Analog Devices datasheets.
Can the AD8042AR be used to replace two AD8041ARZ devices in a design?
Functionally, the AD8042AR contains two amplifiers with performance characteristics similar to the AD8041ARZ, so it can often replace two single amplifiers in space-constrained designs. However, the pinout and PCB layout must be redesigned, and thermal and crosstalk considerations between the two channels should be validated against the AD8042 datasheet.
What is the slew rate of the AD8041ARZ and AD8042AR?
Both the AD8041ARZ and AD8042AR feature a slew rate of 160 V/µs, enabling fast large-signal response in high-speed analog circuits. This value is specified in the Analog Devices datasheets for both parts.
Are the AD8041ARZ and AD8042AR specified for the same operating temperature range?
Yes. Both devices are rated for the industrial temperature range of −40°C to +85°C, as stated in their respective Analog Devices datasheets.