Part A
AD8475ARMZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 1838 個数
- Package
- MSOP-10
- Series
- リニアアンプ - 計装用、オペアンプ、バッファアンプ
Replacement verdict
Compatible functional replacement candidate
The AD8475ARMZ and AD8475BRMZ-RL are functionally interchangeable, sharing identical pinout, package, supply voltage range, and signal conditioning architecture. The B-grade variant offers tighter gain error and offset specifications, making it a suitable upgrade path where precision is critical, while the A-grade remains adequate for less demanding applications. Both parts can be used in the same PCB footprint without layout changes.
Package Type
High match
Pin Configuration
High match
Supply Voltage Range
High match
Gain Error and Offset Accuracy
Validation required
Parts at a glance
Part B
AD8475BRMZ-RL
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 7991 個数
- Package
- MSOP-10
- Series
- リニアアンプ - 計装用、オペアンプ、バッファアンプ
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 | AD8475BRMZ-RL | Why it matters |
|---|---|---|---|
| Amplifier Type | Differential ADC Driver / Funnel Amplifier | Differential ADC Driver / Funnel Amplifier | Both parts must share the same core function to be considered substitutes in a signal chain. |
| Number of Channels | 1 | 1 | Channel count determines how many signal paths the device can drive in a given design. |
| Supply Voltage Range | 3 V to 10 V (single), ±1.5 V to ±5 V (dual) | 3 V to 10 V (single), ±1.5 V to ±5 V (dual) | The supply range must match the system rails for the part to operate correctly. |
| Gain Configuration | Pin-selectable 0.4x or 0.8x attenuation | Pin-selectable 0.4x or 0.8x attenuation | Fixed attenuation options define the input signal scaling before the ADC, affecting dynamic range. |
| Bandwidth | 150 MHz (at 0.8x gain) | 150 MHz (at 0.8x gain) | Bandwidth limits the maximum signal frequency the driver can pass to the ADC without significant roll-off. |
| Input Offset Voltage | ±0.5 mV (typical) | ±0.5 mV (typical) | Offset voltage directly contributes to DC error and affects measurement accuracy. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | The temperature range must cover the application environment for reliable operation. |
| Package / Mounting | 10-Lead MSOP, Surface Mount | 10-Lead MSOP, Surface Mount | Package and footprint compatibility determine whether the part can be dropped into an existing PCB layout. |
| Output Type | Differential | Differential | Differential outputs are required to properly drive differential-input ADCs and reject common-mode noise. |
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 | AD8475ARMZ | 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 | 50V/µs | 50V/µs |
| -3 dB Bandwidth | 150 MHz | 150 MHz |
| Supply Current | 3mA | 3mA |
| Current - Output / Channel | 110 mA | 110 mA |
| Voltage - Supply Span(Min) | 3 V | 3 V |
| Voltage - Supply Span(Max) | 10 V | 10 V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the AD8475ARMZ and AD8475BRMZ-RL?
Both devices are identical AD8475 fully differential funnel amplifiers from Analog Devices in an 8-lead MSOP (RM) package. The AD8475ARMZ is the standard tube/tray ordering variant, while the AD8475BRMZ-RL is the same silicon supplied in tape-and-reel packaging (RL suffix) for automated assembly. The A and B designations refer to the same product grade; the primary difference is packaging and shipment format, not electrical performance.
Are the AD8475ARMZ and AD8475BRMZ-RL electrically interchangeable?
Yes. Both are the same AD8475 funnel amplifier with identical pinout, package (8-lead MSOP), and specified AC/DC performance. The only distinction is the ordering format (tray vs. tape-and-reel), so they are electrically and functionally interchangeable in a given design.
What is the function of the AD8475 in a signal chain?
The AD8475 is a fully differential funnel amplifier that attenuates and level-shifts single-ended or differential signals to drive differential-input ADCs. It provides selectable attenuation (0.4x or 0.8x), integrated precision resistors, and a differential output, making it suitable for driving high-resolution SAR and delta-sigma converters.
What package and pin configuration do these parts use?
Both the AD8475ARMZ and AD8475BRMZ-RL are supplied in an 8-lead MSOP (RM) package. The pinout is identical between the two ordering variants, so PCB land patterns and layout are the same.
Why would a designer choose the AD8475BRMZ-RL over the AD8475ARMZ?
The AD8475BRMZ-RL is provided in tape-and-reel format, which is preferred for high-volume automated pick-and-place assembly lines. The AD8475ARMZ is typically supplied in tubes/trays, which may suit prototyping or low-volume runs. The choice is driven by manufacturing and inventory format rather than electrical differences.
Can the AD8475ARMZ and AD8475BRMZ-RL be used interchangeably in an existing design?
Yes, because they share the same die, package, pinout, and specifications. Substitution is acceptable provided the assembly process can handle the respective packaging format (tray vs. tape-and-reel). No layout or electrical redesign is required.
Do both variants share the same operating temperature range and supply requirements?
Yes. Since both are the same AD8475 device, they share identical supply voltage requirements and specified operating temperature range as defined in the Analog Devices AD8475 datasheet. Packaging format does not affect these ratings.