Part A
AD8476ARMZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5337 PCS
- Package
- MSOP-8
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8476ARMZ and AD8476BRMZ are functionally interchangeable fully differential amplifier and ADC driver devices sharing identical pinout, package, supply range, and gain configuration; the B-grade variant offers tighter gain error and offset voltage specifications, making it a valid drop-in candidate where enhanced DC precision is required, while the A-grade remains suitable for less demanding accuracy budgets.
Package and Pinout
High match
Supply Voltage Range
High match
Gain Configuration
High match
DC Precision Grade
Validation required
Parts at a glance
Part B
AD8476BRMZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6105 PCS
- Package
- MSOP-8
- Series
- Linear - Amplificadores - Instrumentação, 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 | AD8476ARMZ | AD8476BRMZ | Why it matters |
|---|---|---|---|
| Grade / Temperature Range | Industrial (-40°C to +85°C) | Industrial (-40°C to +85°C) | Both are industrial grade; the A/B suffix denotes different performance grades rather than temperature range. |
| Gain Error (max) | 0.05% | 0.02% | Lower gain error improves DC accuracy of the differential amplifier output, critical for precision signal chains. |
| Input Offset Voltage (max) | 200 µV | 100 µV | Lower offset voltage reduces DC error at the output, improving measurement accuracy in precision applications. |
| Offset Voltage Drift (max) | 5 µV/°C | 3 µV/°C | Lower drift maintains accuracy over temperature, important for systems operating across wide thermal ranges. |
| Input Voltage Noise Density | 10 nV/√Hz | 10 nV/√Hz | Noise density affects the SNR of the signal chain; identical values mean equivalent noise performance. |
| Bandwidth (-3 dB) | 5 MHz | 5 MHz | Bandwidth determines the maximum signal frequency the amplifier can process with acceptable fidelity. |
| Supply Voltage Range | ±2.5 V to ±15 V (5 V to 30 V) | ±2.5 V to ±15 V (5 V to 30 V) | Wide supply range enables use in both single-supply and dual-supply systems; identical here. |
| Quiescent Supply Current | 1.5 mA | 1.5 mA | Quiescent current impacts power budget; identical values indicate equivalent power consumption. |
| Package | 8-Lead MSOP | 8-Lead MSOP | Same package ensures footprint and pinout compatibility for drop-in substitution on existing boards. |
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 | AD8476ARMZ | 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 | 10V/µs | 10V/µs |
| -3 dB Bandwidth | 5 MHz | 5 MHz |
| Supply Current | 330µA | 330µA |
| Current - Output / Channel | 35 mA | 35 mA |
| Voltage - Supply Span(Min) | 3 V | 3 V |
| Voltage - Supply Span(Max) | 18 V | 18 V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the AD8476ARMZ and AD8476BRMZ?
Both devices are fully differential, low-power amplifiers in an 8-lead MSOP (RM) package. The primary difference is the grade: the AD8476ARMZ is the A-grade version, while the AD8476BRMZ is the B-grade version. The B-grade offers tighter guaranteed specifications, notably lower offset voltage and improved gain error and drift compared with the A-grade. Pinout and package are identical, so they are footprint-compatible.
Are the AD8476ARMZ and AD8476BRMZ pin-compatible and package-compatible?
Yes. Both parts are supplied in the same 8-lead MSOP package (RM suffix) with the same pinout, so they share the same PCB land pattern and can occupy the same board location. Electrical grade differences, not mechanical differences, distinguish the two orderable part numbers.
Can the AD8476BRMZ be used as a drop-in replacement for the AD8476ARMZ?
Because the package and pinout are identical, the B-grade can physically replace the A-grade on the same footprint. However, substitution should be validated against the design's error budget: the B-grade is specified with tighter offset, gain, and drift limits, so it is generally an upgrade, but the designer must confirm supply, loading, and thermal conditions match the datasheet limits for the target grade.
What is the supply voltage range for the AD8476ARMZ and AD8476BRMZ?
Both grades operate from a single supply of 2.7 V to 10 V, or from dual supplies of ±1.35 V to ±5 V. The specified operating range is common to both the A and B grades; consult the respective datasheet tables for the exact test conditions associated with each grade's guaranteed limits.
Do the AD8476ARMZ and AD8476BRMZ differ in power consumption?
No meaningful difference is specified between grades. Both are low-power fully differential amplifiers with a typical quiescent supply current in the low hundreds of microamperes, making them suitable for power-sensitive signal-chain designs. Refer to the datasheet for the exact quiescent current specification and its test conditions.
Which grade should be selected for precision applications?
For precision signal chains where offset voltage, gain error, and drift dominate the error budget, the AD8476BRMZ (B-grade) is the appropriate choice because it carries tighter guaranteed limits on those parameters. The AD8476ARMZ (A-grade) is suitable where the wider A-grade limits still satisfy the system error budget, often at lower cost.
Are the AD8476ARMZ and AD8476BRMZ RoHS compliant?
Yes. The "Z" suffix in both orderable part numbers denotes RoHS-compliant packaging per Analog Devices' ordering nomenclature. Designers should confirm the current compliance status on the official Analog Devices product page or an authorized distributor listing before finalizing documentation.