Part A
AD8422BRZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3871 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8422BRZ and AD8422BRZ-RL are functionally identical, differing only in packaging format. The AD8422BRZ is supplied in a tube, while the AD8422BRZ-RL is supplied in tape-and-reel for automated assembly. Both share the same die, electrical specifications, and SOIC-8 package, making them fully interchangeable for design and qualification purposes; selection should be driven solely by the assembly and inventory requirements of the production line.
Package Type
High match
Electrical Specifications
High match
Operating Temperature Range
High match
Supply Voltage Range
High match
Parts at a glance
Part B
AD8422BRZ-RL
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7470 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Instrumentation, 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 | AD8422BRZ | AD8422BRZ-RL | Why it matters |
|---|---|---|---|
| Amplifier Type | Instrumentation Amplifier | Instrumentation Amplifier | Confirms both parts are the same functional amplifier type, ensuring circuit topology compatibility. |
| Number of Channels | 1 | 1 | Single-channel configuration must match for direct substitution in a given signal path. |
| Gain Bandwidth Product | 2.2 MHz | 2.2 MHz | Determines the achievable closed-loop bandwidth at a given gain; identical values ensure equivalent AC performance. |
| Input Offset Voltage (max) | ±60 µV | ±60 µV | Offset voltage directly affects DC accuracy; matching values ensure the same precision in measurement applications. |
| Input Bias Current (max) | 1 nA | 1 nA | Low bias current is critical for high-impedance sensor interfaces; identical values preserve input loading behavior. |
| Common-Mode Rejection Ratio (min) | 94 dB | 94 dB | CMRR governs rejection of common-mode noise; matching values ensure equivalent noise immunity. |
| Supply Voltage Range | ±2.3 V to ±18 V | ±2.3 V to ±18 V | Supply range must match to ensure the part operates correctly in the target system's power rails. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range determines suitability for the application environment; identical ratings ensure equivalent reliability. |
| Package / Mounting Type | 8-SOIC, Surface Mount | 8-SOIC, Surface Mount | Package and mounting must match for PCB footprint compatibility and drop-in replacement. |
| Packaging / Delivery Form | Tube | Tape & Reel | Delivery form affects assembly line handling; tape and reel suits automated pick-and-place, while tube suits manual or low-volume assembly. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8422BRZ | AD8422BRZ-RL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Active |
| Amplifier Type | Instrumentation | Instrumentation |
| Number of Circuits | 1 | 1 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 0.8V/µs | 0.8V/µs |
| -3 dB Bandwidth | 2.2 MHz | 2.2 MHz |
| Current - Input Bias | 200 pA | 200 pA |
| Voltage - Input Offset | 25 µV | 25 µV |
| Supply Current | 300µA | 300µA |
| Current - Output / Channel | 20 mA | 20 mA |
| Voltage - Supply Span(Min) | 4.6 V | 4.6 V |
| Voltage - Supply Span(Max) | 36 V | 36 V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the difference between the AD8422BRZ and the AD8422BRZ-RL?
The AD8422BRZ and AD8422BRZ-RL are the same AD8422 instrumentation amplifier die in the same 8-lead SOIC package (R-8 suffix) with the same B-grade specifications. The difference is the packaging format: AD8422BRZ is supplied in standard tube/rail packaging, while the -RL suffix denotes tape-and-reel packaging for automated assembly. Electrical performance is identical between the two orderable part numbers.
Are the AD8422BRZ and AD8422BRZ-RL electrically and functionally interchangeable?
Yes. Both part numbers share the same datasheet specifications for the AD8422 B grade, including gain range, gain error, offset voltage, CMRR, and bandwidth. The only distinction is the shipping container (tube vs. tape-and-reel), so they are interchangeable in circuit design provided the assembly process matches the packaging format.
What package do the AD8422BRZ and AD8422BRZ-RL use?
Both are offered in the 8-lead SOIC package, indicated by the R suffix in the part number. The package is RoHS-compliant, as denoted by the Z suffix. Tape-and-reel quantity for the -RL version follows Analog Devices' standard reel configuration for the 8-lead SOIC body size.
What does the "B" grade signify for the AD8422BRZ and AD8422BRZ-RL?
The B grade designates the higher-performance grade of the AD8422. Per the Analog Devices datasheet, the B grade offers tighter offset voltage, lower gain error, and higher CMRR than the A grade. Both the AD8422BRZ and AD8422BRZ-RL are B-grade devices and therefore share these enhanced specifications.
Can the AD8422BRZ-RL be used as a drop-in replacement for the AD8422BRZ in an existing design?
Yes, from an electrical and footprint standpoint the two are identical, since both use the same 8-lead SOIC package and B-grade silicon. The substitution is only a matter of assembly logistics: the -RL reel format is intended for pick-and-place production, while the tube format suits prototyping or low-volume hand assembly.
Do the AD8422BRZ and AD8422BRZ-RL differ in operating temperature range or supply voltage?
No. Both part numbers are specified over the same industrial temperature range and the same supply voltage range as defined in the AD8422 datasheet. Because they are the same grade and package, all datasheet limits for supply, temperature, and gain apply equally to both orderable codes.
Which part number should be ordered for high-volume automated PCB assembly?
The AD8422BRZ-RL is the appropriate choice for high-volume automated assembly because the -RL suffix indicates tape-and-reel packaging compatible with pick-and-place equipment. The AD8422BRZ tube format is better suited to prototyping, evaluation, and low-volume or hand-assembly operations.