Part A
AD8475ARMZ
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1838 ПКС
- Package
- MSOP-10
- Series
- Линейные - Усилетели - Приборы, ОП Усилетели, Буферные Усилетели
Replacement verdict
Compatible functional replacement candidate
The AD8475ARMZ and AD8476BRMZ-RL are both fully differential amplifier products from Analog Devices in the same 8-lead MSOP package, sharing a common signal-conditioning role. However, they differ in supply voltage range, output configuration, and power consumption, so the AD8476BRMZ-RL should be treated as a functional candidate rather than a direct drop-in replacement. Designers must validate supply rails, output interface, and thermal budget before substituting.
Supply Voltage Range
Validation required
Output Type
Validation required
Package Type
High match
Power Consumption
Validation required
Parts at a glance
Part B
AD8476BRMZ-RL
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6183 ПКС
- Package
- TSSOP-8
- Series
- Линейные - Усилетели - Приборы, ОП Усилетели, Буферные Усилетели
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8475ARMZ | AD8476BRMZ-RL | Why it matters |
|---|---|---|---|
| Amplifier Type | Fully Differential Funnel (Attenuating) | Fully Differential (Unity Gain) | Determines the core signal-conditioning function; the AD8475 attenuates while the AD8476 provides unity-gain buffering, affecting overall system gain architecture. |
| Number of Channels | 1 | 1 | Both are single-channel devices, so channel count is not a differentiator for substitutability. |
| Gain Configuration | Pin-selectable 0.4x or 0.8x attenuation | Fixed unity gain (1x) | Gain setting directly impacts signal scaling; the AD8475 attenuates for higher-voltage inputs while the AD8476 buffers at unity, so they are not drop-in substitutes. |
| Supply Voltage Range | 3 V to 10 V (single), ±1.5 V to ±5 V (dual) | 3 V to 18 V (single), ±1.5 V to ±9 V (dual) | Supply range affects compatibility with the system power rails; the AD8476 tolerates higher supply voltages than the AD8475. |
| Input Voltage Noise Density | 10 nV/√Hz (typical) | 10 nV/√Hz (typical) | Noise density influences achievable SNR in precision signal chains; both are comparable here. |
| Bandwidth (-3 dB) | 150 MHz (at G = 0.8) | 5 MHz (at G = 1) | Bandwidth determines the maximum signal frequency the amplifier can handle; the AD8475 supports much higher frequencies than the AD8476. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +125 °C | Temperature range affects suitability for harsh environments; the AD8476 supports a wider industrial temperature range. |
| Package / Mounting | 8-Lead MSOP (Surface Mount) | 8-Lead MSOP (Surface Mount) | Package compatibility is essential for PCB footprint reuse; both share the same MSOP-8 footprint. |
| Output Type | Differential | Differential | Differential outputs are needed to drive differential ADCs; both provide differential outputs, supporting similar downstream interfaces. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8475ARMZ | AD8476BRMZ-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 | 50V/µs | 10V/µs |
| -3 dB Bandwidth | 150 MHz | 5 MHz |
| Supply Current | 3mA | 330µA |
| Current - Output / Channel | 110 mA | 35 mA |
| Voltage - Supply Span(Min) | 3 V | 3 V |
| Voltage - Supply Span(Max) | 10 V | 18 V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the AD8475ARMZ and AD8476BRMZ-RL?
The AD8475ARMZ is a fully differential funnel amplifier with selectable gains of 0.4 and 0.8, while the AD8476BRMZ-RL is a fully differential amplifier with a fixed gain of 1. Both are available in 8-lead MSOP packages, but they differ in gain configuration, bandwidth, and output swing characteristics. The AD8475 is optimized for driving low-voltage differential ADCs, whereas the AD8476 is a general-purpose fully differential amplifier.
Are the AD8475ARMZ and AD8476BRMZ-RL pin-compatible?
Both devices are offered in an 8-lead MSOP (RM) package, but pin compatibility must be verified against the respective manufacturer datasheets. The AD8475ARMZ and AD8476BRMZ-RL have different pin functions and internal architectures, so they should not be treated as drop-in replacements without confirming the pinout and application circuit against the official Analog Devices documentation.
What are the gain configurations of the AD8475ARMZ and AD8476BRMZ-RL?
The AD8475ARMZ provides selectable attenuation/gain settings of 0.4 and 0.8 via its gain pins, making it suitable for attenuating higher-voltage single-ended signals to match low-voltage differential ADC inputs. The AD8476BRMZ-RL is a unity-gain fully differential amplifier with a fixed gain of 1, intended for general-purpose differential signal conditioning.
Which device is better suited for driving a low-voltage differential ADC?
The AD8475ARMZ is specifically designed as a funnel amplifier to attenuate and level-shift single-ended signals to drive low-voltage differential ADCs, with integrated precision resistors and selectable gains of 0.4 and 0.8. The AD8476BRMZ-RL is a general-purpose unity-gain fully differential amplifier and is not specifically optimized as an ADC funnel amplifier. Selection should be based on the required gain, input range, and ADC interface requirements verified in the datasheets.
Do both parts operate from the same supply voltage range?
Supply voltage ranges differ between the two devices and must be confirmed from the official Analog Devices datasheets. The AD8475ARMZ and AD8476BRMZ-RL are not guaranteed to share identical supply ranges, so the designer should verify the specified supply voltage, quiescent current, and output swing for each part before substitution.
Can the AD8476BRMZ-RL be used as a direct replacement for the AD8475ARMZ?
No, they should not be treated as direct replacements. The AD8475ARMZ has selectable gains of 0.4 and 0.8 with integrated precision resistors, while the AD8476BRMZ-RL is a unity-gain fully differential amplifier. Differences in gain, pin functions, bandwidth, and output characteristics mean any substitution must be validated against the manufacturer datasheets and the target design requirements.
What package do the AD8475ARMZ and AD8476BRMZ-RL use?
Both the AD8475ARMZ and AD8476BRMZ-RL are supplied in an 8-lead MSOP package, indicated by the RM suffix in their part numbers. Designers should still confirm package dimensions, thermal characteristics, and PCB land patterns from the official Analog Devices datasheets before layout.