Part A
AD8362ARUZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4014 PCS
- Package
- TSSOP-16
- Series
- RF Detectors
Replacement verdict
Not a drop-in replacement
The AD8367ARU and AD8362ARUZ are not drop-in replacements for one another. Although both are Analog Devices RF/IF variable gain amplifiers in the same TSSOP-20 package, they differ fundamentally in function: the AD8367ARU is a voltage-controlled variable gain amplifier with a linear-in-dB gain control interface, while the AD8362ARUZ is a logarithmic RMS-responding power detector with a measurement output. Their signal-chain roles, control interfaces, and output characteristics are incompatible, so substituting one for the other requires circuit redesign rather than a direct swap.
Different output type
Different control interface
Different frequency range
Different supply voltage
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 | AD8362ARUZ | Why it matters |
|---|---|---|---|
| Function | Variable gain amplifier (VGA) | RMS-responding power detector | These are fundamentally different signal-chain functions, so they are not direct substitutes for one another. |
| Frequency range | LF to 500 MHz | 50 Hz to 3.8 GHz | Operating frequency band determines whether the part suits the target RF or IF application. |
| Gain / measurement range | -2.5 dB to +42.5 dB gain control range | 65 dB measurement range | The dynamic range defines the usable signal span the device can amplify or measure. |
| Output / input interface | Amplified RF output | Linear-in-dB DC output proportional to input power | The output type dictates how the device connects to downstream circuitry (RF path vs. ADC/control loop). |
| Supply voltage | 2.7 V to 5.5 V | 4.5 V to 5.5 V | Supply range affects compatibility with the system power rail and low-voltage operation. |
| Supply current | ~20 mA typical | ~22 mA typical | Quiescent current impacts power budget and thermal design in the end application. |
| Package | 16-lead TSSOP | 16-lead TSSOP | Package compatibility affects PCB footprint and assembly, though identical packages ease layout reuse. |
| Primary application | Gain control in receivers and transmitters | RF power measurement and AGC detection | Intended application reveals whether the part fits the signal-processing role required by the design. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8362ARUZ | AD8367ARU |
|---|---|---|
| Part Status | Active | Obsolete |
| Frequency | 50Hz ~ 3.8GHz | - |
| RF Type | Cellular, GSM, CDMA, TDMA, TETRA | - |
| Input Range | -52dBm ~ 8dBm | - |
| Accuracy | ±0.5dB | - |
| Voltage - Supply | 4.5V ~ 5.5V | - |
| Supply Current | 20 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 AD8362ARUZ?
The AD8367ARU is an analog-controlled variable gain amplifier (VGA) with a 45 dB gain range and a 500 MHz bandwidth, while the AD8362ARUZ is a 50 Hz to 3.8 GHz RMS-responding power detector that measures true RMS power and provides a linear-in-dB output voltage. They serve different signal-chain roles: the AD8367ARU amplifies and adjusts gain, whereas the AD8362ARUZ measures RF power.
Are the AD8367ARU and AD8362ARUZ pin-compatible?
No. Both devices are offered in a 20-lead TSSOP package, but their pin functions and internal architectures differ. The AD8367ARU pinout is dedicated to VGA operation (gain control, input/output, and supply pins), while the AD8362ARUZ pinout is dedicated to RMS power detection (RF input, output, and reference pins). They cannot be interchanged on the same PCB without redesign.
What is the operating frequency range of each device?
The AD8367ARU is specified for operation from DC to 500 MHz, making it suitable for IF and low-RF VGA applications. The AD8362ARUZ is specified from 50 Hz to 3.8 GHz, covering a much wider frequency range for RMS power measurement in RF and microwave systems.
How does the gain control interface differ between the AD8367ARU and AD8362ARUZ?
The AD8367ARU uses an analog gain-control voltage (0 V to 1 V) to set its gain linearly in dB over a 45 dB range. The AD8362ARUZ does not have a gain-control input; instead, it outputs a DC voltage proportional to the logarithm of the RMS input power, with a nominal slope of 50 mV/dB.
Can the AD8362ARUZ be used as a VGA in a signal chain?
No. The AD8362ARUZ is an RMS-responding power detector, not an amplifier. It does not provide signal gain or a gain-control interface. For variable gain amplification, the AD8367ARU is the appropriate device.
What are the supply voltage and power consumption characteristics of each part?
Both devices operate from a single 5 V supply. The AD8367ARU typically draws about 26 mA (approximately 130 mW), while the AD8362ARUZ typically draws about 20 mA (approximately 100 mW). Designers should verify exact quiescent current and power figures against the respective manufacturer datasheets for the target operating conditions.
Which device is better suited for RF power measurement in a transmitter chain?
The AD8362ARUZ is the appropriate choice for RF power measurement because it is a true RMS-responding detector with a linear-in-dB output over a wide frequency range (50 Hz to 3.8 GHz). The AD8367ARU is a VGA and does not provide power measurement functionality.
Do the AD8367ARU and AD8362ARUZ share the same package and temperature grade?
Both are offered in a 20-lead TSSOP package and are specified for the industrial temperature range of −40°C to +85°C. However, package compatibility does not imply functional interchangeability, as their pinouts and internal functions differ.