Part A
AD8307AR
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2581 Stückzahl
- Package
- SOIC-8
- Series
- Linear-Verstärker
Replacement verdict
Compatible functional replacement candidate
The AD8307ARZ-REEL is a functionally compatible replacement candidate for the AD8307AR, sharing the same logarithmic amplifier core, package footprint, and operating temperature range. The primary distinction is packaging format and lead finish, which require validation against the specific assembly and compliance requirements of the target design.
Function and Circuit Topology
High match
Package Type and Pinout
High match
Operating Temperature Range
High match
Lead Finish and Packaging Format
Validation required
Parts at a glance
Part B
AD8307ARZ-REEL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5962 Stückzahl
- Package
- SOIC-8
- Series
- Linear-Verstärker
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8307AR | AD8307ARZ-REEL | Why it matters |
|---|---|---|---|
| Function | Logarithmic amplifier / RF detector | Logarithmic amplifier / RF detector | Both parts perform the same core signal-detection function, so they are functionally interchangeable in the same circuit role. |
| Frequency Range | DC to 500 MHz | DC to 500 MHz | The usable input bandwidth determines the range of RF signals the detector can process; identical range means equivalent application coverage. |
| Dynamic Range | 92 dB | 92 dB | Dynamic range defines the span of input power levels the log amp can accurately measure; matching values ensure equivalent measurement capability. |
| Logarithmic Slope | 25 mV/dB | 25 mV/dB | The slope sets the output voltage change per dB of input, so identical slope preserves calibration and scaling in the receiving system. |
| Logarithmic Intercept | -84 dBm | -84 dBm | The intercept defines the reference point of the log transfer function; matching intercepts means the same output-to-power mapping. |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Operating supply range must match the system rail; identical range allows drop-in use in the same power architecture. |
| Supply Current | 7.5 mA (typical) | 7.5 mA (typical) | Quiescent current affects power budget and thermal design; equal current draw means no change to power planning. |
| Package / Mounting | 8-Lead SOIC (surface mount) | 8-Lead SOIC (surface mount), tape and reel | Package and mounting style determine PCB footprint and assembly compatibility; both share the SOIC footprint, though the reel option affects production handling. |
| Packaging / Ordering Format | Tube / bulk | Tape and reel | The delivery format affects automated assembly line feeding and inventory handling, though the electrical device is the same. |
| RoHS Compliance | Non-RoHS (leaded) | RoHS compliant (lead-free) | RoHS status affects regulatory compliance and solder process selection; the Z suffix denotes the lead-free variant required for many modern assemblies. |
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 | AD8307AR | AD8307ARZ-REEL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Obsolete | Active |
| Type | Logarithmic Amplifier | Logarithmic Amplifier |
| Applications | Receiver Signal Strength Indication (RSSI) | Receiver Signal Strength Indication (RSSI) |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the difference between the AD8307AR and the AD8307ARZ-REEL?
Both parts are the same AD8307 logarithmic amplifier die in an 8-lead SOIC package. The AD8307AR is supplied in tube form, while the AD8307ARZ-REEL is supplied in tape-and-reel packaging for automated assembly. The "Z" suffix indicates RoHS-compliant lead finish, and the "-REEL" suffix denotes the reel packaging option.
Are the AD8307AR and AD8307ARZ-REEL electrically and functionally identical?
Yes. Both devices share the same datasheet specifications for the AD8307: a 500 MHz bandwidth, 92 dB dynamic range, 25 mV/dB logarithmic slope, and operation from a single 2.7 V to 5.5 V supply. The differences are limited to packaging format and RoHS compliance status.
Is the AD8307ARZ-REEL RoHS compliant while the AD8307AR is not?
The "Z" suffix in AD8307ARZ-REEL designates a RoHS-compliant, lead-free finish per Analog Devices' part numbering convention. The AD8307AR (without the Z suffix) is the non-RoHS legacy ordering code. Designers requiring RoHS compliance should specify the AD8307ARZ-REEL.
Can the AD8307AR and AD8307ARZ-REEL be used interchangeably in an existing PCB design?
Yes, from a footprint and pinout perspective. Both are offered in the same 8-lead SOIC (R-8) package with identical pin functions. The interchangeability consideration is limited to RoHS compliance requirements and the assembly format (tube vs. tape-and-reel).
What is the function of the AD8307 in a signal chain?
The AD8307 is a monolithic logarithmic amplifier (log amp) that converts an AC input signal into a DC output proportional to the logarithm of the input amplitude, with a nominal 25 mV/dB slope. It is commonly used for received signal strength indication (RSSI), power measurement, and signal level detection in RF and IF systems.
What supply voltage and current does the AD8307 require?
Per the Analog Devices datasheet, the AD8307 operates from a single supply of 2.7 V to 5.5 V and typically draws about 7.5 mA of quiescent supply current. These specifications apply equally to the AD8307AR and AD8307ARZ-REEL.
Why would a designer choose the AD8307ARZ-REEL over the AD8307AR?
The AD8307ARZ-REEL is preferred for high-volume automated SMT assembly because tape-and-reel packaging supports pick-and-place equipment, and its RoHS-compliant finish satisfies environmental and regulatory requirements. The AD8307AR in tubes is typically used for prototyping or low-volume hand assembly.