Part A
AD8307AR
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2581 ПКС
- Package
- SOIC-8
- Series
- Линейные - Усилители - Специальное назначение
Replacement verdict
Compatible functional replacement candidate
The AD8307ARZ and AD8307AR are functionally equivalent logarithmic detectors sharing the same core specifications, package, and pinout, with the ARZ suffix denoting RoHS-compliant lead-free construction versus the leaded AR variant. The AD8307ARZ is a valid drop-in replacement for the AD8307AR in new designs, while existing assemblies qualified with the leaded version should confirm solder process compatibility before substitution.
Function and Circuit Architecture
High match
Package and Pinout
High match
Key Electrical Specifications
High match
RoHS and Lead Finish
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 | AD8307ARZ | AD8307AR | 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 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 measure accurately; 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 keep absolute power readings consistent. |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | The supply range determines compatibility with the system power rail; identical ranges allow drop-in use in the same design. |
| Supply Current | 7.5 mA typical | 7.5 mA typical | Quiescent current affects power budget and thermal design; equal current draw means no change in power consumption. |
| Package / Mounting | 8-Lead SOIC (RoHS compliant) | 8-Lead SOIC | Package and mounting style must match the PCB footprint; both are 8-lead SOIC, though the Z suffix denotes RoHS compliance for the ARZ. |
| RoHS Compliance | RoHS compliant (Pb-free) | Non-RoHS (contains lead) | RoHS status affects regulatory compliance and solder process compatibility; the ARZ is lead-free while the AR is the leaded version. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8307AR | AD8307ARZ |
|---|---|---|
| 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 AD8307ARZ and the AD8307AR?
Both are the same AD8307 logarithmic amplifier die in an 8-lead SOIC package. The difference is the ordering suffix: the AD8307ARZ is the RoHS-compliant, lead-free (Pb-free) version, while the AD8307AR is the non-RoHS, lead-containing (Pb) version. The "Z" suffix in the AD8307ARZ denotes RoHS compliance per Analog Devices' ordering nomenclature.
Are the AD8307ARZ and AD8307AR electrically and functionally identical?
Yes. Both parts share the same datasheet specifications for the AD8307: a 500 MHz bandwidth, 92 dB dynamic range, 25 mV/dB nominal slope, and operation from a single 2.7 V to 5.5 V supply. The electrical performance is identical; only the package finish and RoHS status differ.
Can the AD8307ARZ be used as a drop-in replacement for the AD8307AR?
Yes, in most cases. Both are supplied in the same 8-lead SOIC (R-8) package with identical pinout and PCB land pattern. The AD8307ARZ is the RoHS-compliant equivalent, so it can replace the AD8307AR where lead-free assembly is required, provided the design's soldering process and compliance requirements are validated.
Which part should be selected for a new RoHS-compliant design?
The AD8307ARZ should be selected for new designs requiring RoHS compliance, as it is the lead-free (Pb-free) version. The AD8307AR is the non-RoHS version and is generally not appropriate for new designs subject to RoHS or lead-free manufacturing requirements.
Do the AD8307ARZ and AD8307AR have the same operating temperature range?
Yes. Both the AD8307ARZ and AD8307AR are specified over the industrial temperature range of −40°C to +85°C, consistent with the AD8307 datasheet.
What are the key specifications common to both the AD8307ARZ and AD8307AR?
Both parts provide a 500 MHz bandwidth, a 92 dB dynamic range, a nominal 25 mV/dB logarithmic slope, and operate from a single 2.7 V to 5.5 V supply. These are the verified datasheet parameters for the AD8307 family and apply equally to both orderable versions.
Is the AD8307AR still recommended for new designs?
The AD8307AR is the non-RoHS, lead-containing version. For new designs, the RoHS-compliant AD8307ARZ is the appropriate choice. Designers should confirm current availability and lifecycle status with the manufacturer or an authorized distributor before committing to either version.