Part A
AD8476BRMZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 6105 PCS
- Package
- MSOP-8
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
Replacement verdict
Compatible functional replacement candidate
The AD8476BRMZ and AD8475BRMZ-RL are both fully differential amplifier products from Analog Devices in the same 8-lead MSOP package, sharing a common functional role in differential signal conditioning. However, they differ in gain configuration and supply range, so the AD8475BRMZ-RL can serve as a functional candidate only after the gain and supply requirements of the target design are validated against the AD8476BRMZ.
Gain Configuration
Validation required
Package Type
High match
Supply Voltage Range
Validation required
Amplifier Type
High match
Parts at a glance
Part B
AD8475BRMZ-RL
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 7991 PCS
- Package
- MSOP-10
- 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 | AD8476BRMZ | AD8475BRMZ-RL | Why it matters |
|---|---|---|---|
| Amplifier Type | Fully Differential Amplifier | Fully Differential Amplifier with integrated attenuator | The AD8475 includes an integrated precision attenuator, allowing it to accept larger input signals directly, whereas the AD8476 requires external gain-setting resistors. |
| Fixed Gain / Attenuation | Gain of 1 (unity, set by external resistors) | 0.4x or 0.8x selectable attenuation | The AD8475's fixed attenuation options simplify designs for high-voltage input signals, while the AD8476 offers flexible gain via external components. |
| Input Voltage Range | ±V supply dependent (rail-to-rail output) | Up to ±10 V differential input (with attenuation) | The AD8475 can directly interface with higher-voltage signals due to its attenuator, while the AD8476's input range is limited by its supply rails. |
| Supply Voltage Range | ±2.5 V to ±15 V (5 V to 30 V total) | ±2.5 V to ±5 V (5 V to 10 V total) | The AD8476 supports a wider supply range, making it suitable for higher-voltage systems, while the AD8475 is limited to lower supply voltages. |
| Bandwidth (-3 dB) | 5 MHz | 10 MHz (at 0.8x attenuation) | Higher bandwidth in the AD8475 enables faster signal processing, which is important for high-speed ADC driving applications. |
| Input Offset Voltage | ±200 µV (max) | ±500 µV (max) | Lower offset voltage in the AD8476 provides better DC accuracy, which is critical for precision measurement applications. |
| Package | 8-lead MSOP | 10-lead MSOP | Different pin counts and footprints affect PCB layout and may require board redesign when substituting one part for the other. |
| Integrated Resistors | No (external gain resistors required) | Yes (laser-trimmed precision resistors) | The AD8475's integrated resistors improve gain accuracy and reduce external component count, while the AD8476 offers design flexibility with external resistors. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Both parts share the same industrial temperature range, so thermal performance is not a differentiator for substitutability. |
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 | AD8476BRMZ | AD8475BRMZ-RL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Active |
| Amplifier Type | Differential | Differential |
| Number of Circuits | 1 | 1 |
| Output Type | Differential, Rail-to-Rail | Differential, Rail-to-Rail |
| Slew Rate | 10V/µs | 50V/µs |
| -3 dB Bandwidth | 5 MHz | 150 MHz |
| Supply Current | 330µA | 3mA |
| Current - Output / Channel | 35 mA | 110 mA |
| Voltage - Supply Span(Min) | 3 V | 3 V |
| Voltage - Supply Span(Max) | 18 V | 10 V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the primary functional differences between the AD8476BRMZ and AD8475BRMZ-RL?
The AD8476BRMZ is a fully differential amplifier/attenuator with a fixed gain of 1 (unity gain), designed for driving differential ADCs. The AD8475BRMZ-RL is a fully differential amplifier/attenuator with a fixed gain of 0.4, intended for attenuating and level-shifting signals. Both are members of Analog Devices' differential amplifier family but differ in their fixed gain configurations.
Are the AD8476BRMZ and AD8475BRMZ-RL pin-compatible?
Yes, both devices are offered in the same 8-lead MSOP (RM) package and share a common pinout, allowing them to be used in the same PCB footprint. However, because their gain configurations differ, circuit performance and signal scaling must be re-evaluated before substitution.
What is the difference in gain between the AD8476BRMZ and AD8475BRMZ-RL?
The AD8476BRMZ provides a fixed gain of 1 (unity), passing the differential input signal to the output without attenuation. The AD8475BRMZ-RL provides a fixed gain of 0.4, attenuating the differential input by a factor of 0.4. This gain difference directly affects the input voltage range and the ADC full-scale utilization in a given design.
Do both parts support the same supply voltage range?
Both the AD8476BRMZ and AD8475BRMZ-RL operate from a single supply of 3 V to 10 V or from dual supplies of ±1.5 V to ±5 V, as specified in their respective Analog Devices datasheets. Designers should still verify the exact supply limits and headroom requirements for their specific application conditions.
Can the AD8475BRMZ-RL be used as a drop-in replacement for the AD8476BRMZ?
Not as a direct drop-in replacement without design review. Although the package and pinout are the same, the AD8475BRMZ-RL has a gain of 0.4 versus the AD8476BRMZ's gain of 1. This changes the signal scaling, input range, and output swing relative to the ADC, so the surrounding circuit and firmware scaling must be validated before substitution.
What are the typical applications for each device?
The AD8476BRMZ is typically used where unity-gain differential signal conditioning is required, such as driving differential-input ADCs with minimal attenuation. The AD8475BRMZ-RL is typically used where input signal attenuation and level shifting are needed, such as interfacing higher-voltage differential signals to lower-voltage ADC inputs. Both are suited to precision signal-chain applications.
What packaging options are available for these two parts?
Both the AD8476BRMZ and AD8475BRMZ-RL are supplied in an 8-lead MSOP package (the "RM" suffix in the part number). The AD8475BRMZ-RL denotes a tape-and-reel packaging option, while the AD8476BRMZ is typically supplied in standard tube or tray packaging. Package type and pinout are otherwise identical.