Part A
AD8276ARZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 3044 PCS
- Package
- SOIC-8
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
Replacement verdict
Compatible functional replacement candidate
The AD8276ARZ and AD8274ARZ-RL are both precision difference amplifiers in the same 8-lead SOIC package with identical supply and temperature ranges, making them strong functional replacement candidates. However, they differ in gain configuration and bandwidth, so the AD8274ARZ-RL should be validated against the AD8276ARZ's fixed gain-of-1 signal chain before substitution.
Amplifier Function
High match
Package Type
High match
Gain Configuration
Validation required
Bandwidth
Validation required
Parts at a glance
Part B
AD8274ARZ-RL
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 9206 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 | AD8276ARZ | AD8274ARZ-RL | Why it matters |
|---|---|---|---|
| Amplifier Type | Difference amplifier (fixed gain) | Difference amplifier (fixed gain) | Both are difference amplifiers, but their gain configurations differ, affecting signal scaling in the application. |
| Fixed Gain | 1 V/V | 0.5 V/V (gain of 1/2) | Gain directly determines output amplitude relative to input; substituting one for the other changes the signal level by a factor of two. |
| Number of Channels | 1 | 1 | Channel count must match the number of signal paths required by the circuit. |
| Input Offset Voltage (max) | 150 µV | 300 µV | Lower offset voltage improves DC accuracy; a higher offset can introduce measurable error in precision measurement paths. |
| Supply Voltage Range | 2.7 V to 36 V (±1.35 V to ±18 V) | 2.7 V to 36 V (±1.35 V to ±18 V) | The supply range must accommodate the system rails; both support wide single- and dual-supply operation. |
| Supply Current per Amplifier (typ) | 200 µA | 200 µA | Quiescent current affects power budget in low-power and battery-operated designs. |
| Bandwidth (-3 dB, typ) | 550 kHz | 1 MHz | Bandwidth limits the maximum signal frequency the amplifier can pass with acceptable fidelity. |
| CMRR (typ) | 86 dB | 86 dB | Common-mode rejection determines how well the amplifier suppresses unwanted common-mode signals in noisy environments. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | The temperature range must cover the application's environmental conditions for reliable operation. |
| Package / Mounting | 8-SOIC (surface mount) | 8-SOIC (surface mount) | Package and footprint compatibility determine whether a part can be dropped into an existing PCB layout. |
Need help validating a replacement?
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8276ARZ | AD8274ARZ-RL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Series | - | iPolar® |
| Part Status | Active | Active |
| Amplifier Type | Differential | Differential |
| Number of Circuits | 1 | 1 |
| Slew Rate | 1.1V/µs | 20V/µs |
| Gain Bandwidth Product | 550 kHz | 20 MHz |
| Voltage - Input Offset | 100 µV | 300 µV |
| Supply Current | 200µA | 2.3mA |
| Current - Output / Channel | 15 mA | 90 mA |
| Voltage - Supply Span(Min) | 2 V | 5 V |
| Voltage - Supply Span(Max) | 36 V | 36 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 functional differences between the AD8276ARZ and AD8274ARZ-RL?
The AD8276ARZ is a low power, unity-gain difference amplifier, while the AD8274ARZ-RL is a low distortion, high speed difference amplifier with a fixed gain of 0.5. The AD8276 is optimized for low supply current and precision DC performance, whereas the AD8274 is optimized for AC performance, including wider bandwidth and lower harmonic distortion.
Are the AD8276ARZ and AD8274ARZ-RL pin-compatible?
Yes, both devices are offered in an 8-lead SOIC package and share the same pinout. However, pin compatibility does not guarantee functional interchangeability, as their gain configurations and performance characteristics differ significantly.
What is the fixed gain of each device?
The AD8276ARZ is configured for unity gain (G = 1). The AD8274ARZ-RL is configured for a fixed gain of 0.5 (G = 0.5). This difference directly affects the output signal amplitude for a given input differential voltage.
How do the supply current requirements compare?
The AD8276ARZ is specified with a maximum supply current of 250 µA, making it suitable for low power applications. The AD8274ARZ-RL draws a significantly higher maximum supply current of 2.5 mA, reflecting its higher speed and wider bandwidth design.
Which device offers better AC performance?
The AD8274ARZ-RL offers superior AC performance. It provides a -3 dB bandwidth of 20 MHz and a slew rate of 20 V/µs, whereas the AD8276ARZ has a -3 dB bandwidth of 550 kHz and a slew rate of 1.1 V/µs. The AD8274 is therefore better suited for high frequency signal processing.
How do the input offset voltage specifications compare?
The AD8276ARZ features a lower maximum input offset voltage of 100 µV, which is beneficial for precision DC applications. The AD8274ARZ-RL has a maximum input offset voltage of 500 µV, which is adequate for its intended AC-focused applications but less precise for DC accuracy.
What are the operating temperature ranges for these devices?
Both the AD8276ARZ and AD8274ARZ-RL are specified for operation over the industrial temperature range of -40°C to +85°C.
Can the AD8274ARZ-RL be used as a direct drop-in replacement for the AD8276ARZ?
No. Although they are pin-compatible, the AD8274ARZ-RL has a fixed gain of 0.5 and different supply current and bandwidth characteristics. A direct replacement would alter the signal gain and may exceed the supply current budget of the original design. Circuit performance must be re-evaluated before substitution.