Part A
AD812AR
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5743 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Video Amps and Modules
Replacement verdict
Compatible functional replacement candidate
The AD812ARZ is a RoHS-compliant, lead-free version of the AD812AR and is a compatible functional replacement candidate. Both parts share the same core dual current-feedback amplifier design, package, and pinout, with the primary distinction being the package material and lead finish. Designers should validate the specific environmental and soldering requirements for their application.
Amplifier Type
High match
Package Type
High match
Pin Configuration
High match
Lead Finish / RoHS Compliance
Validation required
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD812ARZ | AD812AR | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 | 2 | Both are dual amplifiers, so channel count matches for direct substitution. |
| -3 dB Bandwidth | 145 MHz | 145 MHz | Bandwidth determines the maximum signal frequency the amplifier can handle with acceptable gain. |
| Slew Rate | 1600 V/µs | 1600 V/µs | Slew rate limits how fast the output can respond to large signal swings; identical values ensure equivalent large-signal behavior. |
| Supply Voltage Range | ±2.5 V to ±15 V | ±2.5 V to ±15 V | The supply range must match the system rails for the part to operate correctly in the target design. |
| Input Offset Voltage (max) | 5 mV | 5 mV | Offset voltage affects DC accuracy; matching values preserve the same error budget. |
| Input Bias Current (typ) | 1.5 µA | 1.5 µA | Bias current influences DC errors in high-impedance circuits; identical values keep performance consistent. |
| Package / Mounting | 8-Lead SOIC (Surface Mount) | 8-Lead SOIC (Surface Mount) | Package and mounting type must match for the part to fit the same PCB footprint. |
| RoHS Compliance | RoHS Compliant | Non-RoHS (legacy) | RoHS status affects regulatory compliance and solderability; the Z suffix denotes the lead-free version. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | The temperature range must cover the application environment for reliable operation. |
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 | AD812AR | AD812ARZ |
|---|---|---|
| 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 the AD812ARZ and the AD812AR?
The AD812ARZ and AD812AR are both dual, current-feedback operational amplifiers from Analog Devices in an 8-lead SOIC package. The primary difference is the suffix: the "Z" in AD812ARZ denotes RoHS-compliant, lead-free (Pb-free) construction, while the AD812AR is the non-RoHS, lead-containing (Pb) version. Electrical performance is otherwise equivalent per the datasheet.
Are the AD812ARZ and AD812AR electrically interchangeable?
Yes. Both parts share the same datasheet specifications for the AD812 dual current-feedback amplifier, including bandwidth, slew rate, and supply range. The only documented distinction is the RoHS/lead-free status indicated by the "Z" suffix, so they are electrically interchangeable in the same circuit.
What are the key specifications of the AD812 dual current-feedback amplifier?
Per the Analog Devices datasheet, the AD812 is a dual current-feedback op amp with 145 MHz bandwidth (G = +1), 1600 V/µs slew rate, and operation on ±2.5 V to ±15 V dual supplies. It is specified for low differential gain and phase error, making it suitable for video and high-speed signal processing applications.
Can the AD812ARZ be used as a drop-in replacement for the AD812AR?
Yes, in most cases. Both are the same die in the same 8-lead SOIC package with identical pinout and electrical specifications. The AD812ARZ is the RoHS-compliant variant, so it is a drop-in replacement where lead-free/RoHS compliance is required or acceptable; verify any application-specific qualification requirements before substitution.
Why should I choose the AD812ARZ over the AD812AR?
The AD812ARZ is the RoHS-compliant, lead-free version, which is preferred or required for products sold into markets with RoHS or lead-free mandates (e.g., EU). The AD812AR (non-Z) contains lead and may not satisfy current environmental compliance requirements, so the AD812ARZ is generally the recommended orderable part for new designs.
What package do the AD812ARZ and AD812AR use?
Both parts are supplied in an 8-lead SOIC (Small Outline Integrated Circuit) package, designated "R" in the ordering code. The package outline, pinout, and PCB land pattern are identical between the two variants, so board layout does not change when switching between them.
Are the AD812ARZ and AD812AR still available for purchase?
Availability should be confirmed against current distributor stock and Analog Devices product lifecycle status, as the AD812 family has been on the market for many years and lifecycle status can change. Check DigiKey, Mouser, or the Analog Devices website for current ordering status and any recommended replacement parts before designing them in.