Part A
AD8302ARUZ-RL7
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2916 ПКС
- Package
- TSSOP-14
- Series
- RF детекторы
Replacement verdict
Not a drop-in replacement
The AD8302ARUZ-RL7 and AD8303JRU are not functionally interchangeable; the AD8302ARUZ-RL7 is a dual-channel logarithmic RF gain/phase detector, while the AD8303JRU is a single-channel logarithmic amplifier, so the two differ in core function, channel count, package, and supply requirements and cannot be substituted without redesign.
Different core function
Different channel count
Different package type
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 | AD8302ARUZ-RL7 | AD8303JRU | Why it matters |
|---|---|---|---|
| Function | RF/IF Gain and Phase Detector | Logarithmic Amplifier / RSSI Detector | The two parts perform fundamentally different signal-processing functions, so they are not direct substitutes in a circuit. |
| Frequency Range | LF to 2.7 GHz | DC to 500 MHz | Operating frequency range determines whether the device can be used in the target signal chain. |
| Primary Output | Gain (magnitude) and phase difference voltages | Logarithmic (RSSI) voltage proportional to input level | The output type dictates what the downstream circuitry can measure (gain/phase vs. signal strength). |
| Package | 20-lead TSSOP | 14-lead TSSOP | Different package pin counts and footprints affect PCB layout and drop-in compatibility. |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Supply range must match the system rail; here both are compatible with common 3.3 V and 5 V rails. |
| Number of Channels | Two (dual log detectors for gain/phase) | One (single log amplifier) | Channel count determines whether the device can simultaneously process two signals for ratio/phase measurement. |
| Typical Application | RF power amplifier gain/phase monitoring, VSWR measurement | RSSI, received signal strength indication, log conversion | Application fit is the key criterion for functional substitutability in a given design. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8302ARUZ-RL7 | AD8303JRU |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Frequency | 2.7GHz | - |
| RF Type | General Purpose | - |
| Input Range | -60dBm ~ 0dBm | - |
| Accuracy | ±0.5dB | - |
| Voltage - Supply | 2.7V ~ 5.5V | - |
| Supply Current | 23 mA | - |
| Mounting Type | Surface Mount | - |
Frequently asked questions
Are the AD8302ARUZ-RL7 and AD8303JRU functionally interchangeable?
No. The AD8302ARUZ-RL7 is a 2.7 GHz RF/IF gain and phase detector, while the AD8303JRU is a 3 V, 12-bit successive-approximation ADC. They perform entirely different functions and are not interchangeable.
What are the primary functions of each device?
The AD8302ARUZ-RL7 measures the amplitude ratio and phase difference between two input signals, making it suited for RF/IF gain and phase detection. The AD8303JRU is a 12-bit SAR analog-to-digital converter that digitizes an analog input voltage.
How do the package types differ between the two parts?
The AD8302ARUZ-RL7 is supplied in a 14-lead TSSOP (RU suffix) and is provided in tape-and-reel packaging (RL7). The AD8303JRU is supplied in a 24-lead SOIC (RU suffix) in tube form. The packages differ in pin count and footprint, so they are not drop-in compatible.
Do the two devices operate from the same supply voltage?
No. The AD8302ARUZ-RL7 operates from a nominal 5 V single supply, whereas the AD8303JRU is specified for 3 V operation. Supply requirements differ and must be verified against the respective datasheets before use.
Can the AD8302ARUZ-RL7 be used as an ADC or the AD8303JRU as an RF detector?
No. The AD8302ARUZ-RL7 is an RF/IF gain and phase detector and does not perform analog-to-digital conversion. The AD8303JRU is a 12-bit SAR ADC and does not provide RF gain or phase detection. Each device must be used according to its intended function.
What are the key performance differences relevant to selection?
The AD8302ARUZ-RL7 provides logarithmic amplitude ratio and phase measurement over a wide RF/IF frequency range, while the AD8303JRU provides 12-bit resolution analog-to-digital conversion at a 3 V supply. Selection depends on whether the application requires RF gain/phase detection or voltage digitization.
Are the operating temperature ranges the same for both parts?
Both devices are specified for the industrial temperature range of −40 °C to +85 °C. Confirm the exact grade and limits in the respective manufacturer datasheets for the specific orderable part number.
What should be verified before considering either part for a design?
Verify the functional block (RF detector versus ADC), supply voltage, package and pinout, interface requirements, and the exact orderable part number against the official manufacturer datasheet. Because the two devices serve different functions, they cannot be substituted for one another.