Part A
AD8361ARM
ADI公司
- Lifecycle
- Active
- Stock
- 6375 件
- Package
- TSSOP-8
- Series
- 射頻檢測器
Replacement verdict
Not a drop-in replacement
The AD8367ARUZ and AD8361ARM are not functionally interchangeable. The AD8367ARUZ is a variable-gain amplifier with analog gain control, while the AD8361ARM is a fixed-gain RMS-responding power detector; their core signal-chain functions, gain architecture, and package footprints differ fundamentally, so substituting one for the other is not feasible without redesign.
Different function class
Different gain architecture
Different package footprint
Different output type
Parts at a glance
Part B
AD8367ARUZ
ADI公司
- Lifecycle
- Active
- Stock
- 1680 件
- Package
- TSSOP-14
- Series
- 線性放大器-儀器、運算放大器、緩衝放大器
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8367ARUZ | AD8361ARM | Why it matters |
|---|---|---|---|
| Function | Variable gain amplifier (VGA) with integrated detector | RMS-responding power detector (RF/IF) | These are fundamentally different device types; one amplifies with controllable gain while the other only measures signal power, so they are not functionally interchangeable. |
| Frequency range | LF to 500 MHz | LF to 2.5 GHz | The usable operating bandwidth determines whether the part can be used in a given signal chain; the detector covers much higher frequencies than the VGA. |
| Gain / measurement range | -2.5 dB to +42.5 dB (45 dB gain range) | Linear-in-dB output over ~30 dB input range | The VGA provides adjustable signal gain, whereas the detector provides a linear-in-dB representation of input power; the parameter meaning differs by function. |
| Output type | Amplified RF output plus RSSI/detector output | DC voltage proportional to RMS input power | The output interface dictates how the part connects to downstream circuitry; one drives an RF path, the other drives an ADC or control loop. |
| Supply voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Both operate from the same supply window, so power-rail compatibility is not a differentiator between them. |
| Package | 16-lead TSSOP | 8-lead MSOP | Different footprints and pin counts mean the parts are not drop-in replacements on an existing PCB. |
| Primary application role | Gain control / AGC amplification in receivers | RF power measurement / RSSI detection | Their roles in a system differ, so substitutability depends on whether the design needs amplification or power detection. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8361ARM | AD8367ARUZ |
|---|---|---|
| Part Status | Obsolete | Active |
| Frequency | 2.5GHz | - |
| RF Type | Cellular, CDMA, W-CDMA | - |
| Input Range | 0 ~ 700mV | - |
| Accuracy | ±0.25dB | - |
| Voltage - Supply | 2.7V ~ 5.5V | - |
| Supply Current | 1.1 mA | 26mA |
| Mounting Type | Surface Mount | Surface Mount |
| Series | - | X-AMP® |
| Amplifier Type | - | Variable Gain |
| Number of Circuits | - | 1 |
| -3 dB Bandwidth | - | 500 MHz |
| Current - Input Bias | - | 27 µA |
| Voltage - Supply Span(Min) | - | 2.7 V |
| Voltage - Supply Span(Max) | - | 5.5 V |
| Operating Temperature | - | -40°C ~ 85°C |
Frequently asked questions
What are the primary functional differences between the AD8367ARUZ and the AD8361ARM?
The AD8367ARUZ is a 500 MHz, 45 dB linear-in-dB variable gain amplifier (VGA) with an integrated square-law detector, designed for receive signal chain AGC applications. The AD8361ARM is a 2.5 GHz TruPwr RMS-to-DC converter that measures the RMS value of complex waveforms. In short, the AD8367ARUZ amplifies and adjusts gain, while the AD8361ARM measures signal power.
Do the AD8367ARUZ and AD8361ARM use the same package and pinout?
No. The AD8367ARUZ is supplied in a 20-lead TSSOP package (RU suffix), while the AD8361ARM is supplied in an 8-lead MSOP package (RM suffix). The two devices have different pin counts, pin functions, and PCB land patterns, so they are not footprint-compatible.
What are the operating frequency ranges of the AD8367ARUZ and AD8361ARM?
The AD8367ARUZ is specified for operation from DC to 500 MHz. The AD8361ARM is specified for operation from DC to 2.5 GHz. The AD8361ARM therefore covers a significantly higher input frequency range, consistent with its role as an RF power detector.
Can the AD8367ARUZ and AD8361ARM be used together in a signal chain?
Yes, they serve complementary functions and can be used in the same receive chain. The AD8367ARUZ can provide variable gain amplification, and the AD8361ARM can be used to measure the RMS power of the signal for power control or monitoring. Each device should be configured per its own datasheet recommendations.
What are the supply voltage requirements for the AD8367ARUZ and AD8361ARM?
The AD8367ARUZ operates from a single supply of 2.7 V to 5.5 V. The AD8361ARM operates from a single supply of 2.7 V to 5.5 V. Both devices are therefore compatible with common 3 V and 5 V system rails.
Are the AD8367ARUZ and AD8361ARM interchangeable in an existing design?
No. Because they perform different functions (VGA versus RMS-to-DC converter), have different package footprints (20-lead TSSOP versus 8-lead MSOP), and have different frequency ranges, they cannot be directly substituted for one another. A redesign of the circuit and PCB layout would be required.
What key performance parameter distinguishes the AD8367ARUZ as a gain stage?
The AD8367ARUZ provides a linear-in-dB gain control range of 45 dB with a gain slope of 20 mV/dB, and it integrates a square-law detector for AGC loop implementation. These parameters are specified in the Analog Devices datasheet and support its use as a variable gain amplifier in automatic gain control systems.
What key performance parameter distinguishes the AD8361ARM as a power detector?
The AD8361ARM is a TruPwr RMS-to-DC converter that provides an accurate RMS measurement of complex waveforms, with a specified frequency range extending to 2.5 GHz. Its RMS response makes it suitable for measuring signals with varying crest factors, as documented in the Analog Devices datasheet.