Part A
AD8361ARMZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6139 PCS
- Package
- TSSOP-8
- Series
- RF Detectors
Replacement verdict
Not a drop-in replacement
The AD8367ARU and AD8361ARMZ are not functionally interchangeable despite both being Analog Devices RF/IF signal-processing ICs. The AD8367ARU is a variable-gain amplifier with analog gain control, while the AD8361ARMZ is a fixed-gain RMS-responding power detector. Their differing core functions, output types, supply requirements, and package footprints make direct substitution impractical without circuit redesign.
Different core function
Different output type
Different supply voltage
Different package footprint
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8367ARU | AD8361ARMZ | Why it matters |
|---|---|---|---|
| Function | Variable gain amplifier (VGA) with integrated rms detector | RF rms power detector | Defines the core signal-chain role; a VGA amplifies/attenuates while a detector only measures power, so they are not direct substitutes. |
| Frequency Range | LF to 500 MHz | LF to 2.5 GHz | Determines the operating band; the detector covers much higher frequencies than the VGA. |
| Gain / Measurement Range | -2.5 dB to +42.5 dB (45 dB gain range) | 30 dB measurement range (rms detection) | Sets the dynamic range of the function; the VGA provides controllable gain while the detector provides a 30 dB power-measurement span. |
| Output Type | Amplified RF output plus rms-detector voltage output | Linear-in-dB DC voltage proportional to input rms power | Determines how the device interfaces to the next stage; one delivers RF signal, the other a DC measurement voltage. |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Both operate from the same single-supply range, easing power-rail compatibility. |
| Supply Current | ~26 mA (typical) | ~1.1 mA (typical) | Affects power budget; the VGA draws substantially more current than the low-power detector. |
| Package | 16-lead TSSOP | 8-lead MSOP | Footprint and pin count differ, so board layout and assembly are not interchangeable. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical industrial temperature ratings support use in the same environmental conditions. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8361ARMZ | AD8367ARU |
|---|---|---|
| Part Status | Active | Obsolete |
| 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 AD8367ARU and AD8361ARMZ?
The AD8367ARU 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 AD8361ARMZ is a 2.5 GHz TruPwr RMS-responding power detector intended for RF power measurement. One is a gain-control stage; the other is a power measurement device.
Are the AD8367ARU and AD8361ARMZ pin-compatible or package-compatible?
No. The AD8367ARU is supplied in a 14-lead TSSOP (RU suffix), while the AD8361ARMZ is supplied in an 8-lead MSOP (RM suffix). The packages differ in pin count, footprint, and pin functions, so they are not drop-in replacements for each other.
What are the operating frequency ranges of these two devices?
The AD8367ARU operates over a 500 MHz bandwidth (DC to 500 MHz). The AD8361ARMZ operates from 100 MHz to 2.5 GHz. The frequency ranges overlap only partially, and the AD8361ARMZ extends well beyond the AD8367ARU's upper frequency limit.
Can the AD8361ARMZ be used to replace the AD8367ARU in an AGC loop?
No. The AD8367ARU integrates a variable gain amplifier with a square-law detector to form a complete AGC building block. The AD8361ARMZ is an RMS power detector only and provides no signal gain path, so it cannot perform the VGA function required in an AGC loop.
How do the gain and detection characteristics differ between the two parts?
The AD8367ARU provides a 45 dB linear-in-dB gain range with a square-law detector output for AGC control. The AD8361ARMZ provides an RMS-responding output voltage proportional to input signal power, with no gain stage. Their transfer functions serve different purposes: gain control versus power measurement.
What supply voltage and power consumption do these devices require?
Both devices operate from a single 5 V supply. The AD8367ARU typically draws about 26 mA, while the AD8361ARMZ typically draws about 4.5 mA. The AD8367ARU consumes substantially more power due to its integrated VGA and detector circuitry.
Which device is better suited for RF power measurement in a transmit chain?
The AD8361ARMZ is the appropriate choice for RF power measurement because it is an RMS-responding TruPwr detector covering 100 MHz to 2.5 GHz. The AD8367ARU is a VGA with a detector intended for receive-path AGC, not for calibrated transmit power measurement.
Do both parts support the same temperature range and qualification grade?
Both the AD8367ARU and AD8361ARMZ are specified for the industrial temperature range of −40°C to +85°C. Designers should confirm the exact grade and packaging suffix against the respective manufacturer datasheets before finalizing a design.