Part A
AD8044AR-14
아날로그 디바이스(주)
- Lifecycle
- Active
- Stock
- 4340 PCS
- Package
- SOIC-14
- Series
- 선형 증폭기 - 계측기, 연산 증폭기, 완충 증폭기
Replacement verdict
Compatible functional replacement candidate
The AD8042ARZ and AD8044AR-14 are both quad-channel, high-speed voltage-feedback operational amplifiers from Analog Devices sharing the same core amplifier architecture, making the AD8042ARZ a viable functional substitute for the AD8044AR-14 in many signal-conditioning applications. However, the two devices differ in package footprint (8-lead SOIC vs. 14-lead SOIC), supply voltage range, and quiescent current, so the replacement is not a pin-for-pin drop-in and requires validation of the supply rail, board layout, and thermal budget before adoption.
Channel Count
High match
Package Type
Validation required
Supply Voltage Range
Validation required
Quiescent Current
Validation required
Parts at a glance
Part B
AD8042ARZ
아날로그 디바이스(주)
- Lifecycle
- Active
- Stock
- 3649 PCS
- Package
- SOIC-8
- Series
- 선형 증폭기 - 계측기, 연산 증폭기, 완충 증폭기
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 | AD8044AR-14 | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 | 4 | Determines how many independent signal channels are available in a single package; a dual vs quad device changes board layout and channel count. |
| -3 dB Bandwidth | 160 MHz | 150 MHz | Sets the maximum usable signal frequency; similar bandwidths mean comparable high-speed signal handling. |
| Slew Rate | 225 V/µs | 170 V/µs | Governs how fast the output can respond to large signal steps; affects distortion and large-signal fidelity. |
| Supply Voltage Range | 3 V to 12 V | 3 V to 12 V | Defines compatible power rails; matching ranges allow the same supply design to be reused. |
| Input Offset Voltage (max) | 7 mV | 7 mV | DC accuracy indicator; identical offset specs mean similar precision in DC-coupled applications. |
| Input Bias Current | 1.4 µA | 1.4 µA | Affects error in high-impedance circuits; matching values preserve similar input loading behavior. |
| Quiescent Supply Current per Amplifier | 6.5 mA | 6.5 mA | Impacts power budget; equal per-amplifier current means power scales only with channel count. |
| Package / Mounting | 8-Lead SOIC (surface mount) | 14-Lead SOIC (surface mount) | Footprint and pin count differ, so the PCB layout must be redesigned when substituting one for the other. |
| Output Current (typical) | 50 mA | 50 mA | Determines drive capability for loads; matching values indicate similar load-driving performance. |
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 | AD8044AR-14 | AD8042ARZ |
|---|---|---|
| Part Status | Obsolete | Active |
| Amplifier Type | Voltage Feedback | Voltage Feedback |
| Number of Circuits | 4 | 2 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 190V/µs | 225V/µs |
| -3 dB Bandwidth | 160 MHz | 170 MHz |
| Current - Input Bias | 2 µA | 1.2 µA |
| Voltage - Input Offset | 1.4 mV | 3 mV |
| Supply Current | 11.5mA | 6mA (x2 Channels) |
| Current - Output / Channel | 30 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 AD8042ARZ and AD8044AR-14?
The AD8042ARZ is a dual, low-power, 160 MHz rail-to-rail operational amplifier in an 8-lead SOIC package, while the AD8044AR-14 is a quad, 150 MHz rail-to-rail operational amplifier in a 14-lead SOIC package. The primary differences are channel count (2 vs. 4), package pin count (8 vs. 14), and slightly different bandwidth and supply current specifications per the respective datasheets.
Can the AD8042ARZ be used as a direct drop-in replacement for the AD8044AR-14?
No. The AD8042ARZ is a dual amplifier in an 8-lead SOIC package, whereas the AD8044AR-14 is a quad amplifier in a 14-lead SOIC package. The pin counts, pin functions, and PCB land patterns differ, so a direct drop-in substitution is not possible without redesigning the board layout.
What are the supply voltage ranges for the AD8042ARZ and AD8044AR-14?
Both devices are specified for operation on dual supplies of ±1.5 V to ±6 V or single supplies of 3 V to 12 V, per Analog Devices datasheet specifications. Designers should verify the exact limits in the latest revision of each datasheet before finalizing a design.
How do the bandwidth specifications compare between the AD8042ARZ and AD8044AR-14?
The AD8042ARZ is specified with a −3 dB bandwidth of 160 MHz, while the AD8044AR-14 is specified with a −3 dB bandwidth of 150 MHz, according to Analog Devices datasheet data. Both are rail-to-rail output amplifiers suitable for high-speed signal conditioning.
What are the package and pin count differences between these two parts?
The AD8042ARZ is supplied in an 8-lead SOIC package (SOIC-8), and the AD8044AR-14 is supplied in a 14-lead SOIC package (SOIC-14). The suffix "ARZ" indicates an 8-lead SOIC for the dual device, while "AR-14" indicates a 14-lead SOIC for the quad device.
Are the AD8042ARZ and AD8044AR-14 rail-to-rail on both input and output?
Both devices feature rail-to-rail output swing. Input common-mode range extends to the supply rails within specified limits per the Analog Devices datasheets. Designers should consult the input common-mode voltage range specifications in each datasheet to confirm suitability for a given application.
What are the typical supply current specifications for the AD8042ARZ and AD8044AR-14?
Per Analog Devices datasheet data, the AD8042ARZ (dual) typically draws approximately 5.8 mA total supply current, while the AD8044AR-14 (quad) typically draws approximately 11.6 mA total supply current. These values scale with channel count and should be verified against the latest datasheet revision.
In what applications would the AD8042ARZ be preferred over the AD8044AR-14?
The AD8042ARZ is preferred when only two amplifier channels are needed, allowing a smaller 8-lead SOIC footprint and lower total supply current. The AD8044AR-14 is preferred when four channels are required in a single package, reducing board space compared to using two dual devices.