Part A
AD8276ARMZ
ADI公司
- Lifecycle
- Active
- Stock
- 1258 件
- Package
- MSOP-8
- Series
- 線性放大器-儀器、運算放大器、緩衝放大器
Replacement verdict
Compatible functional replacement candidate
The AD8276ARMZ and AD8271BRMZ-RL are both precision difference amplifiers in an 8-lead MSOP package with a similar gain configuration and supply range, making the AD8276ARMZ a viable functional substitute for the AD8271BRMZ-RL in many precision signal-conditioning applications. However, the two parts differ in gain setting, bandwidth, and input bias characteristics, so the designer must validate the gain accuracy, AC performance, and input offset budget against the target circuit before committing to a drop-in replacement.
Package Type
High match
Supply Voltage Range
High match
Gain Configuration
Validation required
Bandwidth
Validation required
Parts at a glance
Part B
AD8271BRMZ-RL
ADI公司
- Lifecycle
- Active
- Stock
- 9476 件
- Package
- MSOP-10
- Series
- 線性放大器-儀器、運算放大器、緩衝放大器
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8276ARMZ | AD8271BRMZ-RL | Why it matters |
|---|---|---|---|
| Amplifier Type | Difference Amplifier | Programmable Gain Difference Amplifier | Determines the core function; a programmable gain part offers selectable gains while a fixed difference amplifier has a set gain configuration. |
| Number of Channels | 1 | 1 | Channel count affects how many signal paths can be processed per package. |
| Gain Configuration | Fixed gain of 1 (unity) | Programmable (pin-selectable gains) | Fixed vs. programmable gain directly impacts whether the part can be substituted without redesigning the signal chain gain. |
| Supply Voltage Range | 2.7 V to 36 V (single) / ±1.35 V to ±18 V (dual) | 2.7 V to 36 V (single) / ±1.35 V to ±18 V (dual) | Supply range must match the system rails for the device to operate correctly. |
| Input Offset Voltage (max) | ±100 µV | ±150 µV | Offset voltage affects DC accuracy; a larger offset reduces precision in low-level signal measurement. |
| Bandwidth (typical) | 550 kHz | 1.5 MHz | Bandwidth determines the maximum signal frequency the amplifier can handle with acceptable fidelity. |
| Package / Mounting | 8-Lead MSOP (Surface Mount) | 8-Lead MSOP (Surface Mount) | Package and footprint compatibility are essential for drop-in substitution on an existing PCB. |
| Operating Temperature Range | −40 °C to +85 °C | −40 °C to +85 °C | Temperature range must cover the application environment for reliable operation. |
| Quiescent Current (typical) | 200 µA | 1.5 mA | Quiescent current impacts power budget, especially in battery-powered or low-power designs. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8276ARMZ | AD8271BRMZ-RL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Active |
| Amplifier Type | Differential | Programmable Gain |
| Number of Circuits | 1 | 1 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 1.1V/µs | 30V/µs |
| Gain Bandwidth Product | 550 kHz | 15 MHz |
| Current - Input Bias | - | 500 nA |
| Voltage - Input Offset | 100 µV | 300 µV |
| Supply Current | 200µA | 2.3mA |
| Current - Output / Channel | 15 mA | 100 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 |
Frequently asked questions
What are the primary differences between the AD8276ARMZ and the AD8271BRMZ-RL?
The AD8276ARMZ is a single-channel, low-power, unity-gain difference amplifier, while the AD8271BRMZ-RL is a dual-channel, precision difference amplifier with selectable gains of 0.5, 1, and 2. The AD8276ARMZ is specified for unity gain only, whereas the AD8271BRMZ-RL offers pin-selectable gain configurations. Both are housed in 8-lead MSOP packages, but the AD8271BRMZ-RL is supplied in tape-and-reel packaging as indicated by the "-RL" suffix.
Are the AD8276ARMZ and AD8271BRMZ-RL pin-compatible?
No. Although both devices are offered in 8-lead MSOP packages, their pin functions differ. The AD8276ARMZ uses its pins for a fixed unity-gain difference amplifier configuration, while the AD8271BRMZ-RL assigns pins for gain selection (G0, G1) and dual-channel signal routing. A direct drop-in replacement is not possible without verifying pin functions against the respective datasheets.
What are the supply voltage ranges for the AD8276ARMZ and AD8271BRMZ-RL?
Both devices operate from dual supplies of ±2 V to ±18 V or single supplies of 4 V to 36 V, per their manufacturer datasheets. Designers should confirm the exact specified operating range and supply-related performance limits in the official Analog Devices datasheets before finalizing a design.
How do the gain configurations of the AD8276ARMZ and AD8271BRMZ-RL differ?
The AD8276ARMZ is a fixed unity-gain difference amplifier (gain = 1). The AD8271BRMZ-RL provides pin-selectable gains of 0.5, 1, and 2, allowing the user to configure the gain via the G0 and G1 pins. This makes the AD8271BRMZ-RL more flexible for applications requiring multiple gain settings without external resistors.
What are the channel counts of the AD8276ARMZ and AD8271BRMZ-RL?
The AD8276ARMZ is a single-channel difference amplifier. The AD8271BRMZ-RL is a dual-channel difference amplifier, containing two independent amplifier channels in one package. This difference is critical when selecting a device for multi-channel signal conditioning applications.
What packaging options are available for the AD8276ARMZ and AD8271BRMZ-RL?
Both devices are available in 8-lead MSOP packages. The AD8276ARMZ suffix "ARMZ" indicates an 8-lead MSOP package in tube or tray form, while the AD8271BRMZ-RL suffix "-RL" indicates tape-and-reel packaging for automated assembly. Designers should verify the exact packaging quantity and orientation from the manufacturer's ordering guide.
Can the AD8276ARMZ be used as a replacement for the AD8271BRMZ-RL in an existing design?
Not directly. The AD8276ARMZ is a single-channel, fixed unity-gain device, whereas the AD8271BRMZ-RL is a dual-channel, gain-selectable device. Replacing one with the other would require redesigning the circuit for different channel count, gain configuration, and pin assignments. A thorough review of both datasheets and the target application requirements is necessary before any substitution.