Part A
AD8044ARZ-14
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6991 Stückzahl
- Package
- SOP-14
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
Replacement verdict
Not a drop-in replacement
The AD8044ARZ-14 and AD8047AR are not drop-in replacements for one another. The AD8044ARZ-14 is a quad-channel voltage-feedback operational amplifier, while the AD8047AR is a single-channel device, so channel count, package footprint, and pinout differ fundamentally. The two parts also differ in their specified bandwidth and supply-voltage characteristics, meaning a direct board-level substitution is not feasible without redesign.
Different channel count
Different package and pinout
Different bandwidth class
Different supply range
Parts at a glance
Part B
AD8047AR
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2706 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 | AD8044ARZ-14 | AD8047AR | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 4 (Quad) | 1 (Single) | Channel count determines how many independent signal paths can be handled in one package; a quad cannot be directly substituted where a single is required without redesigning the circuit layout. |
| -3 dB Bandwidth | 150 MHz | 250 MHz | Bandwidth sets the maximum signal frequency the amplifier can process with acceptable gain; a lower-bandwidth part may not meet high-speed signal requirements. |
| Slew Rate | 170 V/µs | 750 V/µs | Slew rate limits how fast the output can respond to large signal steps; insufficient slew rate causes distortion in fast, large-amplitude signals. |
| Supply Voltage Range | 3 V to 12 V | ±5 V to ±15 V (10 V to 30 V total) | The allowable supply range must match the system power rails; a part rated only for single low-voltage supplies cannot be dropped into a ±15 V design. |
| Input Voltage Noise Density | 16 nV/√Hz | 5 nV/√Hz | Lower input noise improves signal-to-noise ratio in low-level signal applications; substituting a noisier part can degrade measurement accuracy. |
| Input Offset Voltage (max) | 8 mV | 1 mV | Offset voltage introduces DC error at the output; a higher-offset part may exceed accuracy budgets in precision or DC-coupled circuits. |
| Quiescent Supply Current per Amplifier | 3.4 mA | 6.8 mA | Quiescent current affects power budget and thermal design; a higher-current part may require re-evaluation of power and heat dissipation. |
| Package | 14-lead SOIC | 8-lead SOIC | Package footprint and pinout must match the PCB layout; different packages require board redesign and cannot be directly swapped. |
| Output Current (typical) | 30 mA | 50 mA | Output drive capability determines the load the amplifier can drive; a lower-current part may not adequately drive low-impedance loads or cables. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8044ARZ-14 | AD8047AR |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Amplifier Type | Voltage Feedback | Voltage Feedback |
| Number of Circuits | 4 | 1 |
| Slew Rate | 190V/µs | 750V/µs |
| -3 dB Bandwidth | 160 MHz | 250 MHz |
| Current - Input Bias | 2 µA | 1 µA |
| Voltage - Input Offset | 1.4 mV | 1 mV |
| Supply Current | 11.5mA | 5.8mA |
| Current - Output / Channel | 30 mA | 50 mA |
| Voltage - Supply Span(Min) | 3 V | 6 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 |
| Output Type | Rail-to-Rail | - |
Frequently asked questions
What are the key differences between the AD8044ARZ-14 and the AD8047AR?
The AD8044ARZ-14 is a quad, low-power, high-speed operational amplifier with a typical -3 dB bandwidth of 150 MHz and a slew rate of 170 V/µs, supplied in a 14-lead SOIC package. The AD8047AR is a single, high-speed, low-power operational amplifier with a typical -3 dB bandwidth of 250 MHz and a slew rate of 750 V/µs, supplied in an 8-lead SOIC package. The primary differences are channel count (quad vs. single), package pin count (14 vs. 8), and dynamic performance (bandwidth and slew rate).
Can the AD8044ARZ-14 be used as a direct drop-in replacement for the AD8047AR?
No. The AD8044ARZ-14 is a quad amplifier in a 14-lead SOIC package, while the AD8047AR is a single amplifier in an 8-lead SOIC package. The package footprint, pin count, and pin functions differ, so a direct drop-in replacement is not possible without PCB redesign and validation against the respective datasheets.
What are the supply voltage ranges for the AD8044ARZ-14 and AD8047AR?
Both devices are specified for operation on dual supplies of ±5 V and single supplies of +5 V to +12 V, per their respective Analog Devices datasheets. Designers should verify the exact supply range and associated performance limits in the official datasheet before use.
How do the bandwidth and slew rate of the AD8044ARZ-14 and AD8047AR compare?
Per Analog Devices datasheets, the AD8044ARZ-14 has a typical -3 dB bandwidth of 150 MHz and a slew rate of 170 V/µs, while the AD8047AR has a typical -3 dB bandwidth of 250 MHz and a slew rate of 750 V/µs. The AD8047AR therefore offers higher dynamic performance, whereas the AD8044ARZ-14 provides four channels in one package.
Are the AD8044ARZ-14 and AD8047AR pin-compatible with each other?
No. The AD8044ARZ-14 uses a 14-lead SOIC package with four amplifier channels, and the AD8047AR uses an 8-lead SOIC package with a single amplifier channel. Their pin counts and pin assignments differ, so they are not pin-compatible.
What are the typical applications for the AD8044ARZ-14 versus the AD8047AR?
The AD8044ARZ-14, as a quad high-speed amplifier, is suited to multi-channel signal conditioning, active filters, and buffer arrays where four matched channels are needed in a compact package. The AD8047AR, as a single high-speed amplifier with higher bandwidth and slew rate, is suited to single-channel high-speed signal paths such as video, ADC driving, and pulse applications. Final selection should be validated against the official datasheets for the target design.
Do the AD8044ARZ-14 and AD8047AR share the same operating temperature range?
Both devices are specified by Analog Devices for the industrial temperature range of -40°C to +85°C. Designers should confirm the exact grade and temperature specifications in the respective official datasheets before committing to a design.