Part A
AD8041AR
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 5370 個数
- Package
- SOP-8
- Series
- リニアアンプ - 計装用、オペアンプ、バッファアンプ
Replacement verdict
Compatible functional replacement candidate
The AD8047AR is a viable functional replacement candidate for the AD8041AR in many designs, sharing the same SOIC-8 footprint, supply voltage range, and unity-gain-stable voltage-feedback architecture. However, the AD8047AR offers lower quiescent current and reduced bandwidth, so verify dynamic performance and output drive requirements against your application before substituting.
Package Type
High match
Supply Voltage Range
High match
Bandwidth and Slew Rate
Validation required
Output Drive Capability
Validation required
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8041AR | AD8047AR | Why it matters |
|---|---|---|---|
| -3 dB Bandwidth | 160 MHz | 250 MHz | Higher bandwidth allows the amplifier to handle faster signals and preserves signal integrity in high-speed applications. |
| Slew Rate | 160 V/µs | 250 V/µs | Slew rate determines how quickly the output can respond to large signal changes; higher values reduce distortion for fast transients. |
| Input Voltage Noise Density | 16 nV/√Hz | 5 nV/√Hz | Lower input noise improves the signal-to-noise ratio, which is critical for precision and low-level signal amplification. |
| Supply Current per Amplifier | 5.8 mA | 8.5 mA | Supply current affects power consumption and thermal budget, which matters for portable and power-sensitive designs. |
| Input Offset Voltage (max) | 7 mV | 1 mV | Lower offset voltage reduces DC error, improving accuracy in precision signal conditioning and measurement circuits. |
| Output Current (typical) | 50 mA | 70 mA | Higher output current capability allows driving heavier loads such as cables or low-impedance stages without clipping. |
| Supply Voltage Range | 3 V to 12 V | 3 V to 12 V | The usable supply range determines compatibility with the system power rail and headroom for signal swing. |
| Number of Amplifiers | 1 | 1 | Channel count affects board layout and whether a single device can serve the required signal path. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Package compatibility ensures the part can be dropped into the same footprint without PCB redesign. |
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 | AD8041AR | AD8047AR |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Obsolete | Obsolete |
| Amplifier Type | Voltage Feedback | Voltage Feedback |
| Number of Circuits | 1 | 1 |
| Slew Rate | 170V/µs | 750V/µs |
| -3 dB Bandwidth | 170 MHz | 250 MHz |
| Current - Input Bias | 1.2 µA | 1 µA |
| Voltage - Input Offset | 2 mV | 1 mV |
| Supply Current | 5.8mA | 5.8mA |
| Current - Output / Channel | 50 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 primary differences between the AD8041AR and AD8047AR?
The AD8041AR is a single, low-power, 160 MHz rail-to-rail operational amplifier optimized for +3 V to +12 V single-supply or ±1.5 V to ±6 V dual-supply operation, while the AD8047AR is a single, high-speed, 250 MHz voltage-feedback operational amplifier designed primarily for ±5 V dual-supply applications with a wider bandwidth and higher slew rate.
Are the AD8041AR and AD8047AR pin-compatible in the SOIC-8 package?
Both devices are offered in an 8-lead SOIC package with the standard single op-amp pinout (1 = NULL/NC, 2 = -IN, 3 = +IN, 4 = -VS, 5 = NULL/NC, 6 = OUT, 7 = +VS, 8 = NC), so the package footprint and pin functions are compatible, but electrical differences must be validated before substitution.
How do the bandwidth specifications of the AD8041AR and AD8047AR compare?
The AD8041AR provides a -3 dB bandwidth of approximately 160 MHz (G = +1), while the AD8047AR provides a -3 dB bandwidth of approximately 250 MHz (G = +1), giving the AD8047AR higher small-signal bandwidth for high-speed signal chains.
What are the slew rate and settling characteristics of each device?
The AD8041AR has a slew rate of approximately 160 V/µs, and the AD8047AR has a slew rate of approximately 750 V/µs, making the AD8047AR better suited for fast large-signal transient applications such as video and pulse processing.
How do the supply voltage ranges of the AD8041AR and AD8047AR differ?
The AD8041AR operates from a single supply of +3 V to +12 V or a dual supply of ±1.5 V to ±6 V, whereas the AD8047AR is specified for ±5 V dual-supply operation, so the AD8041AR offers greater flexibility for low-voltage single-supply designs.
Which device is better suited for low-power, single-supply applications?
The AD8041AR is the better choice for low-power single-supply designs because it is specified for +3 V to +12 V single-supply operation with rail-to-rail output swing and a low supply current of approximately 6.8 mA typical, while the AD8047AR is optimized for ±5 V dual-supply high-speed applications.
Can the AD8047AR be used as a drop-in replacement for the AD8041AR?
Not directly. Although both are single op amps in an 8-lead SOIC package, the AD8047AR requires ±5 V dual supplies and has different input/output swing, bandwidth, and slew rate characteristics, so the circuit must be revalidated against the AD8047AR datasheet before substitution.
What are the typical input offset voltage and input bias current specifications for these amplifiers?
The AD8041AR has a typical input offset voltage of approximately 1 mV and input bias current of approximately 1.2 µA, while the AD8047AR has a typical input offset voltage of approximately 1 mV and input bias current of approximately 3 µA, so both require similar offset consideration in precision DC applications.