Part A
AD8275ARMZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5361 PCS
- Package
- MSOP-8
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8276ARMZ and AD8275ARMZ are both precision difference amplifiers in the same 8-lead MSOP package with identical pinout and supply range, making them strong functional replacement candidates. The AD8275ARMZ offers a fixed gain of 0.2 with a wider input common-mode range, while the AD8276ARMZ provides a unity gain of 1 with lower offset voltage, so the appropriate choice depends on the required gain configuration and signal conditioning requirements of the target design.
Package Type
High match
Pin Configuration
High match
Gain Configuration
Validation required
Input Common-Mode Range
Validation required
Parts at a glance
Part B
AD8276ARMZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1258 PCS
- Package
- MSOP-8
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
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 | AD8275ARMZ | Why it matters |
|---|---|---|---|
| Amplifier Type / Function | Difference amplifier (unity-gain, fixed gain = 1) | Difference amplifier (fixed gain = 0.2, attenuation) | The gain configuration determines the input-to-output scaling; a gain of 1 vs 0.2 fundamentally changes signal conditioning and is not directly substitutable without recalibration. |
| Fixed Gain | 1 V/V | 0.2 V/V | Gain directly sets the output amplitude for a given differential input; mismatched gain prevents drop-in replacement in a signal chain. |
| Input Voltage Range (Differential) | ±V supply dependent (wide common-mode, rail-to-rail capable) | ±V supply dependent (wide common-mode, rail-to-rail capable) | Input range must accommodate the source signal; differences affect usable dynamic range and headroom in the application. |
| 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 determines compatibility with the system power rails; identical ranges ease substitution from a power standpoint. |
| Input Offset Voltage (max) | ±150 µV (typical grade dependent) | ±150 µV (typical grade dependent) | Offset voltage limits DC accuracy; similar offsets mean comparable precision performance in measurement front-ends. |
| Bandwidth (-3 dB) | 550 kHz (typical) | 550 kHz (typical) | Bandwidth sets the maximum signal frequency the amplifier can process; matching bandwidth supports similar dynamic response. |
| CMRR (DC, typical) | 86 dB (typical) | 86 dB (typical) | Common-mode rejection determines how well unwanted common-mode signals are suppressed; equal CMRR means similar noise immunity. |
| Package | 8-lead MSOP (RMZ) | 8-lead MSOP (RMZ) | Package footprint and pinout must match for board-level interchangeability; identical packages allow the same PCB layout. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range defines environmental suitability; matching ranges ensure equivalent reliability across operating conditions. |
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 | AD8275ARMZ | AD8276ARMZ |
|---|---|---|
| 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 |
| -3 dB Bandwidth | 15 MHz | - |
| 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 |
| Gain Bandwidth Product | - | 550 kHz |
Frequently asked questions
What are the key differences between the AD8276ARMZ and AD8275ARMZ?
The AD8276ARMZ is a low power, unity-gain difference amplifier, while the AD8275ARMZ is a precision, gain-of-0.2 difference amplifier. The AD8275ARMZ is designed for high-voltage level translation with a fixed gain of 0.2, whereas the AD8276ARMZ provides unity gain and includes an on-chip gain-setting resistor network for external configuration.
Are the AD8276ARMZ and AD8275ARMZ pin-compatible?
Yes, both devices are offered in the same 8-lead MSOP (RMZ) package and share a compatible pinout, allowing them to be used in the same PCB footprint. However, circuit performance differences must be evaluated before substitution.
What is the gain configuration of each device?
The AD8276ARMZ is a unity-gain difference amplifier (gain = 1) with an on-chip resistor network that allows the gain to be set externally. The AD8275ARMZ has a fixed gain of 0.2, intended for attenuating high-voltage differential signals to a level suitable for downstream ADCs.
Which device is better suited for high-voltage level translation?
The AD8275ARMZ is specifically designed for high-voltage level translation with its fixed gain of 0.2, enabling it to attenuate large differential input voltages. The AD8276ARMZ, with unity gain, is more suited to general-purpose difference amplification where signal attenuation is not required.
Do both devices operate from the same supply voltage range?
Both the AD8276ARMZ and AD8275ARMZ operate from a dual supply range of ±2.5 V to ±18 V (or a single supply of 5 V to 36 V), making them suitable for a wide range of industrial and instrumentation applications.
How do the input common-mode voltage ranges compare?
The AD8275ARMZ features an input common-mode voltage range that extends beyond the supply rails, which is beneficial for high-voltage level translation. The AD8276ARMZ has a common-mode range that is also wide but is specified for its unity-gain difference amplifier topology. Designers should consult the respective datasheets for exact limits.
Can the AD8276ARMZ and AD8275ARMZ be used interchangeably in an existing design?
They are not directly interchangeable without design review. The fixed gain of 0.2 in the AD8275ARMZ versus the unity gain of the AD8276ARMZ will change the signal chain transfer function. The external gain-setting network of the AD8276ARMZ also affects behavior. Both devices must be validated against the target application requirements.