Part A
AD8275ARMZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5361 Stückzahl
- Package
- MSOP-8
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
Replacement verdict
Compatible functional replacement candidate
The AD8275ARMZ and AD8276BRMZ-RL are both precision difference amplifiers from Analog Devices in the same 8-lead MSOP package, sharing a common functional architecture and pinout. The AD8276BRMZ-RL offers a wider supply voltage range and lower gain error, making it a viable functional substitute for the AD8275ARMZ in most precision signal-conditioning applications, provided the gain configuration and supply rails are validated against the target design.
Amplifier Function
High match
Package Type
High match
Supply Voltage Range
Validation required
Gain Configuration
Validation required
Parts at a glance
Part B
AD8276BRMZ-RL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 9566 Stückzahl
- Package
- TSSOP-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 | AD8275ARMZ | AD8276BRMZ-RL | Why it matters |
|---|---|---|---|
| Amplifier Type | Difference amplifier (fixed gain) | Difference amplifier (unity gain) | Determines the core function and whether the part provides fixed signal gain or unity buffering of a differential signal. |
| Gain | 0.2 V/V | 1 V/V | Gain directly sets the output scaling relative to the input, so a different gain changes the signal chain transfer function and is not directly substitutable. |
| Number of Channels | 1 | 1 | Channel count must match the number of differential signals being conditioned in the design. |
| Supply Voltage Range | 2.7 V to 5.5 V (single supply) | 2.7 V to 36 V (single or dual supply) | The allowable supply range determines compatibility with the system rail voltages and headroom available for the signal. |
| Input Offset Voltage (max) | ±250 µV | ±200 µV | Offset voltage limits DC accuracy; a lower offset improves precision in low-level differential measurements. |
| Input Bias Current (typ) | 50 nA | 50 nA | Bias current interacts with source impedance and affects offset error, especially in high-impedance sensor interfaces. |
| Bandwidth (-3 dB) | 15 MHz | 550 kHz | Bandwidth sets the maximum signal frequency the amplifier can process accurately, so a large difference affects high-speed applications. |
| CMRR (typ) | 86 dB | 86 dB | Common-mode rejection ratio determines how well the amplifier rejects unwanted common-mode noise on the differential input. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | The temperature range must cover the application environment to ensure specified performance and reliability. |
| Package / Mounting | 8-lead MSOP (surface mount) | 8-lead MSOP (surface mount) | Package and footprint compatibility determine whether the part can be dropped into the same PCB layout. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8275ARMZ | AD8276BRMZ-RL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Active |
| Amplifier Type | Differential | Differential |
| Number of Circuits | 1 | 1 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 25V/µs | 1.1V/µs |
| Gain Bandwidth Product | - | 550 kHz |
| Voltage - Input Offset | 300 µV | 100 µV |
| Supply Current | 1.9mA | 200µA |
| Current - Output / Channel | 30 mA | 15 mA |
| Voltage - Supply Span(Min) | 3.3 V | 2 V |
| Voltage - Supply Span(Max) | 15 V | 36 V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
| -3 dB Bandwidth | 15 MHz | - |
Frequently asked questions
What are the primary differences between the AD8275ARMZ and the AD8276BRMZ-RL?
The AD8275ARMZ is a single-channel, low-power difference amplifier optimized for precision signal conditioning, while the AD8276BRMZ-RL is a dual-channel difference amplifier offered in a tape-and-reel packaging option. The AD8275ARMZ is specified with a fixed gain of 0.2 and operates from a single 3.3 V to 5 V supply, whereas the AD8276BRMZ-RL provides a fixed gain of 1 and supports a wider supply range of ±2.5 V to ±15 V (or 5 V to 30 V single-supply). The "RL" suffix on the AD8276BRMZ-RL denotes a 13-inch reel packaging format for automated assembly.
Are the AD8275ARMZ and AD8276BRMZ-RL pin-compatible?
No. The AD8275ARMZ is housed in an 8-lead MSOP (RM-8) package, while the AD8276BRMZ-RL is housed in an 8-lead SOIC (R-8) package. The package footprints, pin assignments, and PCB land patterns differ, so these devices are not drop-in replacements for one another.
What are the supply voltage requirements for each device?
The AD8275ARMZ operates from a single supply of 3.3 V to 5 V. The AD8276BRMZ-RL operates from dual supplies of ±2.5 V to ±15 V or a single supply of 5 V to 30 V. Designs must ensure the supply rails and decoupling are appropriate for the selected device.
What fixed gain does each amplifier provide?
The AD8275ARMZ provides a fixed gain of 0.2 (attenuation), making it suitable for scaling down high-voltage signals into an ADC input range. The AD8276BRMZ-RL provides a fixed gain of 1 (unity), suitable for buffering and level-shifting differential signals without amplitude change.
How do the bandwidth and slew rate specifications compare?
The AD8275ARMZ has a typical −3 dB bandwidth of 15 MHz and a slew rate of 25 V/µs. The AD8276BRMZ-RL has a typical −3 dB bandwidth of 1 MHz and a slew rate of 1 V/µs. The AD8275ARMZ is therefore better suited for higher-frequency signal conditioning, while the AD8276BRMZ-RL targets lower-bandwidth precision applications.
What are the input offset voltage and CMRR specifications for these parts?
The AD8275ARMZ specifies a maximum input offset voltage of 250 µV and a typical CMRR of 86 dB. The AD8276BRMZ-RL specifies a maximum input offset voltage of 200 µV and a typical CMRR of 86 dB. Both devices offer precision-grade offset performance suitable for high-accuracy difference amplification.
What is the significance of the "RL" suffix on the AD8276BRMZ-RL?
The "RL" suffix indicates that the AD8276BRMZ-RL is supplied in tape-and-reel packaging (13-inch reel) for high-volume automated pick-and-place assembly. The AD8275ARMZ is supplied in standard tube or tray packaging. The electrical performance of the AD8276BRMZ-RL is identical to the non-reel AD8276BRMZ variant.
Can the AD8275ARMZ and AD8276BRMZ-RL be used interchangeably in an existing design?
No. The devices differ in package footprint (MSOP vs SOIC), fixed gain (0.2 vs 1), supply range (3.3–5 V single vs ±2.5 to ±15 V dual), and bandwidth (15 MHz vs 1 MHz). Substitution requires a full redesign of the PCB layout, supply rail configuration, and signal scaling network, followed by validation against the target application requirements.