Part A
AD847AR
ADI公司
- Lifecycle
- Active
- Stock
- 7655 件
- Series
- Linear - Amplifiers - Instrumentation, Op Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD847ARZ and AD847AR are functionally equivalent high-speed operational amplifiers sharing the same core specifications, package, and pinout, with the AD847ARZ differing only as the RoHS-compliant lead-free variant of the AD847AR. The AD847ARZ is a suitable functional replacement candidate for the AD847AR in most applications, provided the designer confirms lead-free solder process compatibility and verifies availability of the non-RoHS AD847AR for legacy designs requiring exemption status.
Amplifier Specifications
High match
Package Type
High match
Pin Configuration
High match
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 | AD847ARZ | AD847AR | Why it matters |
|---|---|---|---|
| Amplifier Type | Voltage Feedback Amplifier | Voltage Feedback Amplifier | Both are the same amplifier topology, so functional behavior is equivalent. |
| Number of Circuits | 1 | 1 | Single-channel configuration must match for direct substitution. |
| Gain Bandwidth Product | 50 MHz | 50 MHz | Determines the frequency range over which the amplifier provides usable gain. |
| Slew Rate | 300 V/µs | 300 V/µs | Affects large-signal high-frequency performance and settling behavior. |
| Input Offset Voltage | 0.5 mV | 0.5 mV | Low offset is critical for DC accuracy in precision signal chains. |
| Supply Voltage Range | ±4.5 V to ±18 V | ±4.5 V to ±18 V | Must match the system power rails for the part to operate correctly. |
| Package / Mounting Type | 8-SOIC, Surface Mount | 8-SOIC, Surface Mount | Same footprint and mounting allow drop-in board replacement. |
| RoHS / Lead-Free Status | RoHS Compliant, Lead-Free | Non-RoHS, Contains Lead | The Z suffix denotes lead-free/RoHS compliance, which affects regulatory and environmental requirements. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C (industrial) | Temperature range must cover the application environment for reliable operation. |
Need help validating a replacement?
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD847AR | AD847ARZ |
|---|---|---|
| Part Status | Obsolete | Active |
| Base Product Number | AD847 | - |
| Amplifier Type | Standard (General Purpose) | General Purpose |
| Number of Circuits | 1 | 1 |
| Slew Rate | 300V/µs | 300V/µs |
| Gain Bandwidth Product | 50 MHz | 50 MHz |
| Current - Input Bias | 3.3 µA | 3.3 µA |
| Voltage - Input Offset | 500 µV | 500 µV |
| Supply Current | 5.3mA | 5.3mA |
| Voltage - Supply Span (Min) | 9 V | - |
| Voltage - Supply Span (Max) | 36 V | - |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
| Packaging | Tube | - |
| Current - Output / Channel | 32 mA | 32 mA |
| Voltage - Supply Span(Min) | - | 9 V |
| Voltage - Supply Span(Max) | - | 36 V |
Frequently asked questions
What is the difference between the AD847ARZ and the AD847AR?
The AD847ARZ and AD847AR are both Analog Devices AD847 high-speed operational amplifiers in an 8-lead SOIC package. The primary difference is the suffix: the "Z" in AD847ARZ denotes RoHS-compliant lead-free construction, while the AD847AR is the non-RoHS (leaded) version. Both share the same electrical specifications and package outline.
Are the AD847ARZ and AD847AR electrically identical?
Yes. Both parts are the same AD847 amplifier die in the same 8-lead SOIC package, so the datasheet electrical specifications (bandwidth, slew rate, input offset voltage, noise, supply range, and output drive) apply equally to both. The only documented difference is the RoHS/lead-free status indicated by the "Z" suffix.
Can the AD847ARZ be used as a drop-in replacement for the AD847AR?
Yes, in most cases. Both are 8-lead SOIC devices with identical pinouts and electrical performance, so the AD847ARZ can replace the AD847AR on an existing PCB. The substitution should still be validated against the design's assembly and compliance requirements, since the AD847ARZ is the RoHS-compliant variant.
What are the key specifications of the AD847?
The AD847 is a high-speed, low-power operational amplifier with a 50 MHz unity-gain bandwidth, 300 V/µs slew rate, and 35 ns settling time to 0.1%. It operates on ±5 V to ±15 V supplies, delivers up to 32 mA output current, and is specified for the commercial temperature range of 0°C to +70°C in the 8-lead SOIC package.
Does the "Z" suffix affect the operating temperature range or performance?
No. The "Z" suffix in AD847ARZ indicates RoHS compliance and lead-free (Pb-free) construction only. It does not change the specified temperature range, which remains 0°C to +70°C for both the AD847AR and AD847ARZ, nor does it alter any electrical parameter.
Which variant should be selected for RoHS-compliant assemblies?
The AD847ARZ should be selected for RoHS-compliant assemblies, as its "Z" suffix confirms lead-free, RoHS-compliant construction. The AD847AR is the non-RoHS version and is appropriate only where leaded construction is acceptable or required.
Are both parts available in the same package and pinout?
Yes. Both the AD847ARZ and AD847AR are supplied in the 8-lead SOIC (R-8) package with identical pin assignments, so PCB land patterns and pin functions are the same for both variants.