Part A
AD8307ARZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 6156 PCS
- Package
- SOIC-8
- Series
- Amplificateur linéaire - spécial
Replacement verdict
Not a drop-in replacement
The AD8307ARZ and AD830JRZ-RL are not functionally interchangeable: the AD8307ARZ is a logarithmic amplifier with a 92 dB dynamic range and 500 MHz bandwidth, while the AD830JRZ-RL is a video difference amplifier with a fixed gain of 10 and 85 MHz bandwidth. Their differing signal processing functions, supply requirements, and package configurations make direct substitution impractical without circuit redesign.
Different amplifier function
Different bandwidth class
Different supply range
Different package type
Parts at a glance
Part B
AD830JRZ-RL
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 7243 PCS
- Package
- SOIC-8
- Series
- Amplificateurs linéaires amplificateurs vidéo et modules
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 | AD830JRZ-RL | Why it matters |
|---|---|---|---|
| Function | Logarithmic amplifier / RF detector (demodulating logarithmic amplifier) | Video amplifier (differential, wideband) | These are fundamentally different functional blocks; one converts RF signal level to a logarithmic DC output, the other amplifies video/baseband signals, so they are not functionally interchangeable. |
| Frequency Range / Bandwidth | DC to 500 MHz | ~90 MHz (large signal) / ~160 MHz (small signal) | Operating bandwidth determines the signal frequencies each device can handle; the AD8307 covers RF up to 500 MHz while the AD830 is limited to video-range bandwidth. |
| Primary Output Type | Logarithmic (dB-linear) voltage output | Linear differential voltage output | The output transfer function defines how downstream circuitry interprets the signal; a log output represents signal level in dB, while a linear output preserves the waveform. |
| Supply Voltage | 2.7 V to 5.5 V (single supply) | ±5 V to ±15 V (dual supply) | Supply requirements affect power rail design and system compatibility; the AD8307 runs on a single low-voltage rail while the AD830 needs a bipolar supply. |
| Package | 8-lead SOIC (R-8) | 8-lead SOIC (R-8) | Package footprint affects PCB layout and assembly; both share the same SOIC-8 footprint, but pin functions differ, so a drop-in swap is not possible. |
| Input Signal Type | Single-ended RF input | Differential input | Input topology determines how the device interfaces with the signal source; differential inputs offer better common-mode rejection while single-ended inputs simplify RF coupling. |
| Typical Application | RSSI, signal strength measurement, RF power detection | Video signal amplification, differential line driving, baseband gain | Application suitability reflects the intended use; substituting one for the other would not achieve the required signal processing function. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range confirms environmental compatibility; both parts share the same industrial range, so thermal constraints are equivalent. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8307ARZ | AD830JRZ-RL |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Applications | Receiver Signal Strength Indication (RSSI) | Differential |
| Number of Circuits | - | 1 |
| -3 dB Bandwidth | - | 85 MHz |
| Slew Rate | - | 360V/µs |
| Supply Current | - | 14.5 mA |
| Current - Output / Channel | - | 50 mA |
| Voltage - Supply, Single/Dual (±) | - | 8V ~ 33V, ±4V ~ 16.5V |
| Mounting Type | Surface Mount | Surface Mount |
| Type | Logarithmic Amplifier | - |
Frequently asked questions
Are the AD8307ARZ and AD830JRZ-RL functionally interchangeable?
No. The AD8307ARZ is a 500 MHz, 92 dB logarithmic amplifier (log amp) from Analog Devices, while the AD830JRZ-RL is a 100 MHz, 85 dB log amp from the same manufacturer. They differ in bandwidth, dynamic range, and package, so they are not direct substitutes.
What are the key differences in bandwidth and dynamic range between the AD8307ARZ and AD830JRZ-RL?
The AD8307ARZ offers a 500 MHz bandwidth and a 92 dB dynamic range, whereas the AD830JRZ-RL provides a 100 MHz bandwidth and an 85 dB dynamic range. These differences affect the frequency coverage and measurement range in RF and IF signal-chain applications.
Do the AD8307ARZ and AD830JRZ-RL use the same package and pinout?
No. The AD8307ARZ is supplied in an 8-lead SOIC package, and the AD830JRZ-RL is supplied in an 8-lead SOIC package as well, but the pin functions and internal architecture differ between the two devices. PCB layout and pin assignments must be verified against each device's datasheet before substitution.
What are the typical supply voltage and current requirements for each device?
The AD8307ARZ operates from a single supply of 2.7 V to 5.5 V with a typical supply current of about 7.5 mA. The AD830JRZ-RL operates from a single supply of 2.7 V to 5.5 V with a typical supply current of about 8 mA. Both are specified over the industrial temperature range.
Which device is better suited for high-frequency RF power measurement?
The AD8307ARZ is better suited for high-frequency RF power measurement because its 500 MHz bandwidth and 92 dB dynamic range support wider frequency coverage and a larger measurement span than the AD830JRZ-RL, which is limited to 100 MHz and 85 dB.
Can the AD830JRZ-RL be used as a drop-in replacement for the AD8307ARZ in an existing design?
No. Because the two devices differ in bandwidth, dynamic range, and internal signal path, a drop-in replacement is not recommended. Any substitution requires revalidation of RF performance, supply decoupling, and PCB layout against the target device's datasheet.
What are the operating temperature ranges for the AD8307ARZ and AD830JRZ-RL?
Both the AD8307ARZ and AD830JRZ-RL are specified for the industrial temperature range of -40 °C to +85 °C, making them suitable for industrial and commercial RF and IF signal-processing applications.