Part A
AD8362ARUZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4014 Stückzahl
- Package
- TSSOP-16
- Series
- HF-Detektoren
Replacement verdict
Not a drop-in replacement
The AD8369ARUZ and AD8362ARUZ are not functionally interchangeable despite sharing the same TSSOP-16 package. The AD8369ARUZ is a digitally controlled variable gain amplifier with a 45 dB gain range and parallel gain control interface, whereas the AD8362ARUZ is a 50 Hz to 3.8 GHz RMS-responding power detector with a logarithmic output. Their core functions, signal path roles, and output characteristics are fundamentally different, so substitution requires complete circuit redesign rather than a direct swap.
Different core function
Different output type
Different control interface
Different signal path role
Parts at a glance
Part B
AD8369ARUZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4576 Stückzahl
- Package
- TSSOP-16
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8369ARUZ | AD8362ARUZ | Why it matters |
|---|---|---|---|
| Function | Digitally controlled variable gain amplifier (VGA) | RMS-responding power detector (logarithmic amplifier) | These are fundamentally different functions; one amplifies with adjustable gain, the other measures signal power, so they are not functionally interchangeable. |
| Frequency Range | 600 MHz (specified operating range up to 600 MHz) | 3.8 GHz (specified operating range up to 3.8 GHz) | The usable signal bandwidth determines which applications each part can serve; the detector covers much higher frequencies than the VGA. |
| Gain / Measurement Range | -10 dB to +35 dB variable gain (45 dB range) | 65 dB measurement range (logarithmic output) | The VGA provides adjustable amplification, while the detector provides a wide dynamic range for power measurement; the ranges serve different purposes. |
| Control Interface | 4-bit parallel digital gain control (3 dB steps) | Analog output proportional to input power (no gain control) | The VGA is digitally programmed for gain, whereas the detector outputs an analog voltage representing signal level; control schemes are incompatible. |
| Output Type | Amplified RF signal output | Linear-in-dB DC voltage output | One delivers an RF signal, the other a DC voltage proportional to power, so downstream circuitry requirements differ completely. |
| Supply Voltage | 5 V single supply | 5 V single supply | Both operate from the same nominal supply, so power-rail design is compatible even though the functions differ. |
| Package | 16-lead TSSOP (RUZ) | 16-lead TSSOP (RUZ) | Identical package and pin count allow similar board footprint, but pin functions differ so they are not drop-in replacements. |
| Primary Application | Receive/transmit gain control in RF signal chains | RF power measurement and level detection | The intended use cases are distinct, confirming the parts are complementary rather than substitutable. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8362ARUZ | AD8369ARUZ |
|---|---|---|
| Part Status | Active | Active |
| 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 | 37mA |
| Mounting Type | Surface Mount | Surface Mount |
| Series | - | X-AMP® |
| Amplifier Type | - | Variable Gain |
| Number of Circuits | - | 1 |
| Slew Rate | - | 1200V/µs |
| -3 dB Bandwidth | - | 600 MHz |
| Current - Input Bias | - | 160 µA |
| Voltage - Supply Span(Min) | - | 3 V |
| Voltage - Supply Span(Max) | - | 5.5 V |
| Operating Temperature | - | -40°C ~ 85°C |
Frequently asked questions
What are the primary functions of the AD8369ARUZ and AD8362ARUZ?
The AD8369ARUZ is a digitally controlled variable gain amplifier (VGA) operating from DC to 600 MHz with a gain range of -5 dB to +40 dB. The AD8362ARUZ is a 50 Hz to 3.8 GHz RF power detector that provides a linear-in-dB output voltage proportional to the RMS value of its input signal.
Are the AD8369ARUZ and AD8362ARUZ pin-compatible and directly interchangeable?
No. Although both devices are offered in the same 16-lead TSSOP package (RU-16), they have different pin functions and internal architectures. The AD8369ARUZ is a VGA with digital gain control and differential input/output, while the AD8362ARUZ is an RMS power detector with an RF input and a buffered output voltage. They are not direct substitutes.
What is the operating frequency range of each device?
The AD8369ARUZ operates from DC to 600 MHz. The AD8362ARUZ operates from 50 Hz to 3.8 GHz.
How does the gain control interface differ between the AD8369ARUZ and AD8362ARUZ?
The AD8369ARUZ uses a 4-bit parallel digital control bus (pins D0–D3) to select one of 16 gain steps, with a gain range of -5 dB to +40 dB. The AD8362ARUZ does not have a gain control interface; instead, it outputs a DC voltage that is linear-in-dB with respect to the RMS input power, typically scaled at 50 mV/dB.
What are the typical supply voltage and power consumption specifications?
Both devices operate from a single 5 V supply. The AD8369ARUZ typically draws about 100 mA (500 mW). The AD8362ARUZ typically draws about 20 mA (100 mW).
Which device is suitable for RF power measurement and which for signal amplification?
The AD8362ARUZ is intended for RF power measurement and detection, providing an RMS-responding output voltage. The AD8369ARUZ is intended for signal amplification and gain control in receiver and transmitter signal chains.
What are the input and output signal characteristics of each device?
The AD8369ARUZ has a differential input and differential output, with an input impedance of 200 Ω and an output impedance of 200 Ω. The AD8362ARUZ has a single-ended RF input (typically 50 Ω) and a single-ended buffered voltage output.