Part A
AD8306AR
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7304 PCS
- Package
- SOIC-16
- Series
- Linear - Amplifiers - Special Purpose
Replacement verdict
Compatible functional replacement candidate
The AD8306ARZ-RL7 is a lead-free, RoHS-compliant reissue of the AD8306AR and is functionally interchangeable in the same 16-lead SOIC footprint, with identical logarithmic amplifier core, limiting output, and supply requirements. The only meaningful distinction is package finish and packaging format, so the AD8306ARZ-RL7 can serve as a direct replacement where lead-free compliance and tape-and-reel assembly are acceptable.
Function and Circuit Architecture
High match
Package and Pinout
High match
Supply Voltage and Power
High match
Package Finish and Packaging Format
Validation required
Parts at a glance
Part B
AD8306ARZ-RL7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4522 PCS
- Package
- SOIC-16
- Series
- Linear - Amplifiers - Special Purpose
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8306AR | AD8306ARZ-RL7 | Why it matters |
|---|---|---|---|
| Function | Limiting logarithmic amplifier / RSSI detector | Limiting logarithmic amplifier / RSSI detector | Both parts perform the same core signal-processing function, so they are functionally interchangeable in the same circuit role. |
| Frequency Range | DC to 400 MHz | DC to 400 MHz | The operating bandwidth must cover the application's signal frequency for the device to work correctly. |
| Dynamic Range | 100 dB | 100 dB | Dynamic range determines the span of input signal levels the log amp can accurately measure. |
| Supply Voltage | 2.7 V to 6.5 V | 2.7 V to 6.5 V | The supply range must match the system rail to ensure proper biasing and operation. |
| Package / Mounting | 16-Lead SOIC (surface mount) | 16-Lead SOIC (surface mount) | Identical package and footprint allow drop-in board replacement without layout changes. |
| RoHS Compliance | Non-RoHS (leaded) | RoHS compliant | RoHS status affects regulatory compliance and solder process compatibility for new designs. |
| Packaging / Ordering Format | Tube / individual | Tape and reel (RL7) | Packaging format affects assembly line handling and is important for automated production. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | The temperature range must cover the application environment for reliable operation. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8306AR | AD8306ARZ-RL7 |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Obsolete | Active |
| Type | Limiting-Logarithmic Amplifier | Limiting-Logarithmic Amplifier |
| Applications | Receiver Signal Strength Indication (RSSI) | Receiver Signal Strength Indication (RSSI) |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the AD8306AR and AD8306ARZ-RL7?
The AD8306AR and AD8306ARZ-RL7 are functionally identical 5 MHz to 400 MHz, 100 dB logarithmic amplifiers. The primary differences are package/ordering format and RoHS compliance: the AD8306AR is supplied in a standard 16-lead SOIC tube format, while the AD8306ARZ-RL7 is the RoHS-compliant version supplied in 7-inch tape-and-reel packaging for automated assembly.
Are the AD8306AR and AD8306ARZ-RL7 electrically interchangeable?
Yes. Both parts share the same die and specified electrical performance, including a 5 MHz to 400 MHz operating frequency range, 100 dB dynamic range, and logarithmic slope of 20 mV/dB. The "Z" suffix denotes RoHS compliance, and the "-RL7" suffix denotes tape-and-reel packaging; neither affects the electrical specifications.
What is the difference between the "Z" suffix and the "-RL7" suffix in AD8306ARZ-RL7?
The "Z" suffix indicates that the device is RoHS-compliant and lead-free, per Analog Devices' ordering nomenclature. The "-RL7" suffix indicates a 7-inch tape-and-reel packaging format, typically with 750 units per reel, intended for high-volume automated pick-and-place assembly.
Can the AD8306ARZ-RL7 be used as a drop-in replacement for the AD8306AR?
Yes, from an electrical and footprint standpoint. Both are offered in the same 16-lead SOIC package with identical pinout and specified performance. The substitution is appropriate provided the design accepts RoHS-compliant, lead-free construction and the tape-and-reel packaging format is compatible with the assembly process.
What are the key specifications of the AD8306 logarithmic amplifier?
The AD8306 is a 5 MHz to 400 MHz logarithmic amplifier with a 100 dB dynamic range, a nominal logarithmic slope of 20 mV/dB, and a logarithmic intercept of approximately -95 dBm. It operates from a single 2.7 V to 6.5 V supply and is specified over the -40°C to +85°C industrial temperature range.
Does the AD8306ARZ-RL7 support the same temperature range as the AD8306AR?
Yes. Both the AD8306AR and AD8306ARZ-RL7 are specified over the industrial temperature range of -40°C to +85°C. The RoHS-compliant "Z" version and tape-and-reel packaging do not alter the specified operating temperature range.
Which part should be selected for automated high-volume production?
The AD8306ARZ-RL7 is the appropriate choice for automated high-volume production because it is supplied in 7-inch tape-and-reel format compatible with pick-and-place equipment, and it is RoHS-compliant for lead-free assembly processes. The AD8306AR in tube format is better suited to prototyping or low-volume manual assembly.