Part A
AD8044ARZ-14
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6991 PCS
- Package
- SOP-14
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8040AR is a viable functional substitute for the AD8044ARZ-14 in many quad op-amp applications, provided the lower supply voltage range and reduced bandwidth are acceptable for the target design. Both devices share the same SOIC-14 package and quad topology, but the AD8044ARZ-14 offers wider supply headroom and higher speed, so validation against the specific signal chain is recommended before committing to a drop-in replacement.
Package Type
High match
Channel Count
High match
Supply Voltage Range
Validation required
Gain Bandwidth Product
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 | AD8044ARZ-14 | AD8040AR | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 4 | 4 | Both are quad amplifiers, so channel count is compatible for multi-channel signal chains. |
| -3 dB Bandwidth | 150 MHz | 125 MHz | Bandwidth determines the maximum signal frequency the amplifier can handle with acceptable gain flatness. |
| Slew Rate | 170 V/µs | 60 V/µs | Slew rate limits how fast the output can respond to large signal steps; higher slew rate supports faster large-signal transients. |
| Supply Voltage Range | 3 V to 12 V | 2.7 V to 12 V | The supply range must cover the system rail voltage for the part to operate reliably in the target design. |
| Input Offset Voltage (max) | 6 mV | 6 mV | Offset voltage affects DC accuracy; matching values indicate similar DC error contribution. |
| Quiescent Supply Current per Amplifier | 3.4 mA | 1.5 mA | Lower quiescent current reduces power consumption, which is critical in power-sensitive or battery-powered systems. |
| Output Current | 50 mA | 75 mA | Output drive capability determines the load the amplifier can drive, such as cables or low-impedance loads. |
| Package / Mounting | 14-Lead SOIC (Surface Mount) | 14-Lead SOIC (Surface Mount) | Identical package and pinout allow direct board-level substitution without layout changes. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Matching temperature ranges ensure both parts meet the same environmental requirements. |
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 | AD8044ARZ-14 | AD8040AR |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Amplifier Type | Voltage Feedback | General Purpose |
| Number of Circuits | 4 | 4 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 190V/µs | 63V/µs |
| -3 dB Bandwidth | 160 MHz | 125 MHz |
| Current - Input Bias | 2 µA | 700 nA |
| Voltage - Input Offset | 1.4 mV | 1.6 mV |
| Supply Current | 11.5mA | 1.4mA (x4 Channels) |
| Current - Output / Channel | 30 mA | 170 mA |
| Voltage - Supply Span(Min) | 3 V | 2.7 V |
| Voltage - Supply Span(Max) | 12 V | 12 V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the AD8044ARZ-14 and the AD8040AR?
The AD8044ARZ-14 is a quad, low-power, high-speed operational amplifier rated for 3 V to 12 V operation 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 AD8040AR is a quad, rail-to-rail input/output amplifier rated for 2.7 V to 12 V operation with a typical −3 dB bandwidth of 125 MHz and a slew rate of 60 V/µs, supplied in a 14-lead SOIC package. The AD8044ARZ-14 emphasizes higher bandwidth and slew rate, while the AD8040AR emphasizes rail-to-rail input and output swing.
Are the AD8044ARZ-14 and AD8040AR pin-compatible?
Both devices are quad amplifiers offered in a 14-lead SOIC package, and their pinouts follow the standard quad op-amp configuration (four amplifiers with shared V+ and V− pins). However, pin compatibility should be confirmed against the specific manufacturer datasheet pinout for each device before substitution, since electrical differences remain even when the package and pin functions align.
Can the AD8040AR be used as a direct replacement for the AD8044ARZ-14?
Not without design validation. Although both are quad amplifiers in 14-lead SOIC packages, the AD8044ARZ-14 provides higher bandwidth (150 MHz vs 125 MHz typical) and higher slew rate (170 V/µs vs 60 V/µs typical), while the AD8040AR provides rail-to-rail input and output. Supply range, input/output swing, and dynamic performance differences must be verified against the target circuit requirements before substitution.
What are the supply voltage ranges for these two amplifiers?
The AD8044ARZ-14 operates from a single supply of 3 V to 12 V (or dual supplies within that total range). The AD8040AR operates from a single supply of 2.7 V to 12 V. Designs operating near the lower supply limit should account for the wider low-voltage headroom of the AD8040AR.
Which device offers rail-to-rail input and output capability?
The AD8040AR is specified with rail-to-rail input and output, allowing signal swing close to both supply rails. The AD8044ARZ-14 is not a rail-to-rail input/output device; its input and output voltage ranges are limited relative to the supply rails. This makes the AD8040AR preferable for low-voltage, single-supply designs requiring maximum dynamic range.
How do the bandwidth and slew rate of the two devices compare?
The AD8044ARZ-14 has a typical −3 dB bandwidth of 150 MHz and a slew rate of 170 V/µs. The AD8040AR has a typical −3 dB bandwidth of 125 MHz and a slew rate of 60 V/µs. For high-frequency or fast-transient applications, the AD8044ARZ-14 provides higher dynamic performance, while the AD8040AR trades some speed for rail-to-rail operation.
What package options are available for the AD8044ARZ-14 and AD8040AR?
The AD8044ARZ-14 is supplied in a 14-lead SOIC package (the "Z" suffix indicates a lead-free/RoHS-compliant SOIC package). The AD8040AR is also supplied in a 14-lead SOIC package. Both are quad amplifiers, so the package footprint is the same 14-lead SOIC outline, but designers should verify the exact orderable part number and package drawing in the respective datasheets.
Which device is better suited for low-voltage single-supply applications?
The AD8040AR is generally better suited for low-voltage single-supply applications because it operates down to 2.7 V and provides rail-to-rail input and output, maximizing signal swing. The AD8044ARZ-14 requires a minimum 3 V supply and does not offer rail-to-rail input/output, so its usable signal range is more restricted at low supply voltages.