Part A
AD8276ARZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3044 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8276ARZ and AD8277BRZ-RL are both precision difference amplifiers from the same AD8276/AD8277 family, sharing identical pinout, supply range, and gain architecture, so the AD8277BRZ-RL can serve as a functional replacement candidate for the AD8276ARZ in most designs. However, the AD8277BRZ-RL is a dual-channel device with tighter grade specifications, so verify channel count requirements, power consumption budget, and cost targets before substituting.
Amplifier Configuration
High match
Package and Pinout
High match
Channel Count
Validation required
Supply Current
Validation required
Parts at a glance
Part B
AD8277BRZ-RL
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2988 PCS
- Package
- SOIC-14
- 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 | AD8276ARZ | AD8277BRZ-RL | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 1 | 2 | Determines how many independent difference amplifier channels are available in a single package, directly affecting channel count and board space. |
| Gain Configuration | Fixed gain of 1 (unity) | Fixed gain of 1 (unity) | Both are unity-gain difference amplifiers, so signal scaling behavior is equivalent; this confirms functional interchangeability for gain-critical designs. |
| Supply Voltage Range | 2.7 V to 36 V (single supply) | 2.7 V to 36 V (single supply) | Defines the operating supply window; matching ranges allow the parts to be used in the same power rails without redesign. |
| Input Offset Voltage (max) | ±250 µV | ±150 µV | Lower offset improves DC accuracy; the B-grade part offers tighter offset, which matters for precision measurement front ends. |
| Input Offset Voltage Drift | ±5 µV/°C (typ) | ±3 µV/°C (typ) | Drift affects accuracy over temperature; the lower drift of the B-grade part benefits applications spanning wide temperature ranges. |
| Bandwidth (–3 dB) | 550 kHz | 550 kHz | Sets the maximum signal frequency the amplifier can process; identical bandwidth means equivalent AC performance. |
| CMRR (DC) | 86 dB (min) | 86 dB (min) | Common-mode rejection determines how well the amplifier rejects unwanted common-mode signals; matching CMRR supports equivalent noise immunity. |
| Package | 8-lead SOIC | 14-lead SOIC | Package footprint and pin count differ, so PCB layout must be adapted; this is a key physical substitutability constraint. |
| Operating Temperature Range | –40 °C to +85 °C | –40 °C to +85 °C | Confirms both parts are rated for the same industrial temperature envelope, supporting use in identical environments. |
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 | AD8276ARZ | AD8277BRZ-RL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Active |
| Amplifier Type | Differential | Instrumentation |
| Number of Circuits | 1 | 2 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 1.1V/µs | 1.1V/µs |
| Gain Bandwidth Product | 550 kHz | 550 kHz |
| Voltage - Input Offset | 100 µV | 100 µV |
| Current - Output / Channel | 15 mA | 15 mA |
| Voltage - Supply Span(Min) | 2 V | 2 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 |
| Supply Current | 200µA | - |
Frequently asked questions
What are the primary differences between the AD8276ARZ and AD8277BRZ-RL?
The AD8276ARZ is a single-channel, low-power, unity-gain difference amplifier specified with a maximum gain error of 0.05% and gain drift of 5 ppm/°C, supplied in an 8-lead SOIC package. The AD8277BRZ-RL is a dual-channel difference amplifier with a maximum gain error of 0.05% and gain drift of 5 ppm/°C, supplied in a 14-lead SOIC package and provided in tape-and-reel format. The AD8277 offers two independent amplifiers in one package, while the AD8276 provides one amplifier in a smaller footprint.
Are the AD8276ARZ and AD8277BRZ-RL pin-compatible?
No. The AD8276ARZ uses an 8-lead SOIC package, while the AD8277BRZ-RL uses a 14-lead SOIC package. The pin counts and pin functions differ, so they are not drop-in replacements for each other on the same PCB land pattern.
What are the supply voltage ranges for these difference amplifiers?
Both the AD8276 and AD8277 operate from a single supply of 2.7 V to 36 V or from dual supplies of ±2.7 V to ±18 V. This wide supply range supports use in both low-voltage and industrial signal-conditioning applications.
How do the bandwidth and slew rate of the AD8276ARZ and AD8277BRZ-RL compare?
Both devices are unity-gain difference amplifiers with a typical -3 dB bandwidth of 550 kHz and a typical slew rate of 1.1 V/µs. The dynamic performance is essentially the same for both parts, so the choice between them is driven primarily by channel count and package.
What is the input common-mode voltage range of these devices?
The AD8276 and AD8277 feature a wide input common-mode voltage range that extends from the negative supply to 40 V above the negative supply, independent of the positive supply. This allows the devices to handle large common-mode signals in high-side sensing and industrial measurement applications.
What are the typical quiescent supply currents of the AD8276ARZ and AD8277BRZ-RL?
The AD8276ARZ typically draws about 200 µA of quiescent supply current. The AD8277BRZ-RL, being a dual-channel device, typically draws about 400 µA total. Both are low-power parts suitable for battery-powered and portable instrumentation.
What is the operating temperature range for these difference amplifiers?
Both the AD8276ARZ and AD8277BRZ-RL are specified for the industrial temperature range of -40°C to +85°C, making them suitable for industrial signal-conditioning and instrumentation applications.
What is the difference in packaging and delivery format between the two parts?
The AD8276ARZ is supplied in an 8-lead SOIC package in tube or standard reel quantities. The AD8277BRZ-RL is supplied in a 14-lead SOIC package in tape-and-reel format (the -RL suffix denotes reel packaging), which is intended for automated high-volume assembly lines.