Part A
AD812AR
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5743 Stückzahl
- Package
- SOIC-8
- Series
- Linear-Verstärker für Video-Verstärker und Module
Replacement verdict
Compatible functional replacement candidate
The AD812ARZ-REEL is a functionally compatible replacement candidate for the AD812AR, sharing the same dual current-feedback amplifier core, SOIC-8 package, and specified operating temperature range. The primary distinction is packaging format, with the AD812ARZ-REEL supplied in tape-and-reel for automated assembly, while both parts remain Pb-free and RoHS-compliant. Designers should confirm supply-chain availability and any lifecycle status differences before transitioning.
Amplifier Core and Channel Count
High match
Package Type and Pinout
High match
Operating Temperature Range
High match
Packaging Format and Lifecycle Status
Validation required
Parts at a glance
Part B
AD812ARZ-REEL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 9600 Stückzahl
- Package
- SOIC-8
- Series
- Linear-Verstärker für Video-Verstärker und Module
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD812AR | AD812ARZ-REEL | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 | 2 | Dual-channel configuration must match for circuit topology compatibility. |
| -3 dB Bandwidth | 145 MHz | 145 MHz | Determines the maximum signal frequency the amplifier can handle with acceptable gain. |
| Slew Rate | 1600 V/µs | 1600 V/µs | Affects large-signal transient response and distortion at high frequencies. |
| Supply Voltage Range | ±2.5 V to ±15 V | ±2.5 V to ±15 V | Must match the system power rails for proper operation and signal swing. |
| Input Offset Voltage (max) | 5 mV | 5 mV | DC accuracy depends on offset; higher offset causes larger output error in precision paths. |
| Input Bias Current | 6 µA | 6 µA | Bias current interacts with source impedance and affects DC error and noise. |
| Package / Mounting | 8-Lead SOIC (surface mount) | 8-Lead SOIC (surface mount), tape and reel | Footprint must match the PCB; reel packaging affects assembly handling but not electrical function. |
| RoHS Compliance | Non-RoHS (leaded) | RoHS compliant | RoHS status affects regulatory compliance and solder process compatibility for new designs. |
| Part Status / Lifecycle | Obsolete / not recommended for new designs | Active / production | Active parts are preferred for new designs to ensure long-term availability and support. |
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Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD812AR | AD812ARZ-REEL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Obsolete | Active |
| Applications | Current Feedback | Current Feedback |
| Number of Circuits | 2 | 2 |
| -3 dB Bandwidth | 145 MHz | 145 MHz |
| Slew Rate | 1600V/µs | 1600V/µs |
| Supply Current | 4.5 mA | 4.5 mA |
| Current - Output / Channel | 50 mA | 50 mA |
| Voltage - Supply, Single/Dual (±) | 2.4V ~ 36V, ±1.2V ~ 18V | 2.4V ~ 36V, ±1.2V ~ 18V |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the difference between AD812AR and AD812ARZ-REEL?
Both parts are the same AD812 dual current-feedback operational amplifier die in an 8-lead SOIC package. The AD812AR is the standard tube/tray ordering option, while AD812ARZ-REEL is the RoHS-compliant (Z suffix) version supplied on tape and reel for automated assembly. The "Z" denotes lead-free/RoHS construction, and "REEL" denotes tape-and-reel packaging.
Are AD812AR and AD812ARZ-REEL electrically and functionally identical?
Yes. Both are the AD812 dual current-feedback op amp with the same specified AC and DC performance, including 145 MHz bandwidth (G = +1), 1600 V/µs slew rate, and 50 mA output current per amplifier. The differences are limited to RoHS compliance and packaging format, not the silicon or electrical specifications.
Is AD812ARZ-REEL a drop-in replacement for AD812AR?
Yes, from a footprint and function standpoint. Both use the same 8-lead SOIC (R-8) package with identical pinout, so the PCB land pattern is unchanged. The AD812ARZ-REEL is RoHS-compliant and tape-and-reel packaged, so it can replace AD812AR where lead-free compliance and reel-fed assembly are required, provided the design already accepts the AD812 electrical specifications.
What package do AD812AR and AD812ARZ-REEL use?
Both are supplied in the 8-lead SOIC package (Analog Devices R-8 suffix). The package outline, pin count, and pin functions are identical between the two ordering options.
What are the key specifications of the AD812?
The AD812 is a dual current-feedback op amp with 145 MHz unity-gain bandwidth, 1600 V/µs slew rate, 0.02% differential gain and 0.02° differential phase (NTSC), and 50 mA output current per amplifier. It operates on ±5 V to ±15 V supplies and is specified over the commercial temperature range. These specifications apply equally to AD812AR and AD812ARZ-REEL.
Why would a designer choose AD812ARZ-REEL over AD812AR?
AD812ARZ-REEL is chosen when RoHS/lead-free compliance is required and when tape-and-reel packaging is needed for high-volume automated pick-and-place assembly. AD812AR is the non-Z, tube/tray option and is typically selected for prototyping or where leaded (non-RoHS) assembly is acceptable.
Can AD812AR and AD812ARZ-REEL be mixed on the same PCB assembly?
Electrically and mechanically they are interchangeable, so mixing is possible from a footprint and function perspective. However, mixing a RoHS (Z) part with a non-RoHS part on the same assembly may conflict with the board's declared RoHS status and process requirements, so the assembly's compliance documentation should be checked before mixing.