Part A
AD8475ARMZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 1838 PCS
- Package
- MSOP-10
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
Replacement verdict
Compatible functional replacement candidate
The AD8475ARMZ and AD8476BRMZ 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, supply range, and bandwidth, so the AD8476BRMZ should be treated as a functional candidate rather than a direct drop-in replacement. Designers must validate gain, supply, and dynamic performance requirements against the target circuit before substituting.
Gain Configuration
Validation required
Supply Voltage Range
Validation required
Bandwidth
Validation required
Package Type
High match
Parts at a glance
Part B
AD8476BRMZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 6105 PCS
- Package
- MSOP-8
- 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 | AD8475ARMZ | AD8476BRMZ | Why it matters |
|---|---|---|---|
| Amplifier Type | Fully Differential Amplifier with integrated attenuator (funnel amplifier) | Fully Differential Amplifier (unity-gain difference amplifier) | Defines the core signal-conditioning function; the AD8475 includes selectable attenuation for high-voltage inputs, while the AD8476 is a unity-gain difference amplifier, so they are not drop-in substitutes. |
| Gain Configuration | Pin-selectable attenuation of 0.4 or 0.8 | Fixed unity gain (1) | Gain determines the input-to-output scaling; the AD8475 attenuates large signals, whereas the AD8476 passes signal at unity, changing system transfer function. |
| Input Voltage Range | Up to ±10 V differential (with attenuation) | ±VREF-limited differential input | Determines the maximum signal the amplifier can accept; the AD8475 handles higher input voltages due to its attenuator, affecting compatibility with high-voltage sensors. |
| Supply Voltage Range | 3 V to 10 V single supply (or ±1.5 V to ±5 V dual) | 2.7 V to 10 V single supply (or ±1.35 V to ±5 V dual) | Supply range affects compatibility with the system power rail; slight differences may matter in low-voltage or wide-swing designs. |
| -3 dB Bandwidth | 150 MHz (G = 0.4) | 5 MHz | Bandwidth determines the maximum signal frequency the amplifier can process; the AD8475 supports much higher-frequency signals than the AD8476. |
| Input Offset Voltage | ±0.5 mV max (typical) | ±0.2 mV max | Offset voltage contributes DC error; lower offset in the AD8476 improves precision for low-level signal measurement. |
| Quiescent Supply Current | ~3.5 mA | ~1.5 mA | Quiescent current affects power consumption; the AD8476 is more power-efficient, which matters for portable or low-power designs. |
| Package | 8-lead MSOP | 8-lead MSOP | Package footprint affects PCB layout and assembly; identical packages allow the same board footprint but do not guarantee electrical interchangeability. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +125°C | Temperature range determines suitability for harsh environments; the AD8476 supports a wider range for industrial applications. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8475ARMZ | AD8476BRMZ |
|---|---|---|
| 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?
The AD8475ARMZ is a fully differential funnel amplifier with selectable gains of 0.4 and 0.8, while the AD8476BRMZ is a fully differential amplifier with a fixed gain of 1. Both are housed in 8-lead MSOP packages, but they differ in gain configuration, input/output architecture, and specified performance grades.
Are the AD8475ARMZ and AD8476BRMZ pin-compatible?
Both devices are offered in an 8-lead MSOP (RM) package, but pin compatibility must be verified against the respective manufacturer datasheets, as pin functions and internal architecture differ between the two parts.
What are the gain options for each device?
The AD8475ARMZ provides selectable attenuation/gain settings of 0.4 and 0.8 via its gain pins, while the AD8476BRMZ is a unity-gain (G = 1) fully differential amplifier.
What is the supply voltage range for the AD8475ARMZ and AD8476BRMZ?
Both devices operate from a single supply of 3 V to 10 V or a dual supply of ±1.5 V to ±5 V, as specified in the Analog Devices datasheets.
Which device is better suited for driving differential ADCs?
The AD8475ARMZ is specifically designed as a funnel amplifier for driving differential successive-approximation ADCs, offering integrated gain and level shifting. The AD8476BRMZ is a general-purpose fully differential amplifier that can also drive differential ADCs but requires external gain-setting components.
Do both parts support a wide operating temperature range?
Both the AD8475ARMZ and AD8476BRMZ are specified over the industrial temperature range of −40°C to +85°C, per their respective datasheets.
What are the package and mounting options for these devices?
Both the AD8475ARMZ and AD8476BRMZ are supplied in 8-lead MSOP packages and are surface-mount devices, as indicated by the "RM" suffix and "Z" RoHS-compliant designation.