Part A
ADRF5020BCCZN-R7
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2390 PCS
- Package
- LGA-20
- Series
- RF Switches
Replacement verdict
Not a drop-in replacement
The ADRF5721BCCZN and ADRF5020BCCZN-R7 are fundamentally different RF devices: the ADRF5721BCCZN is a silicon digital step attenuator, while the ADRF5020BCCZN-R7 is a silicon SPDT RF switch. They serve distinct signal-chain functions, so one cannot directly replace the other without redesigning the surrounding RF path.
Different device function
Different RF topology
Different control interface
Different signal path role
Parts at a glance
Part B
ADRF5721BCCZN
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1548 PCS
- Package
- LGA-16
- Series
- Attenuators
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADRF5721BCCZN | ADRF5020BCCZN-R7 | Why it matters |
|---|---|---|---|
| Function | Digital attenuator (DSA) | SPDT RF switch | These are fundamentally different component types; one attenuates signal amplitude while the other routes signals between ports, so they are not functionally substitutable. |
| Frequency range | 9 kHz to 40 GHz | 100 MHz to 30 GHz | The operating bandwidth determines which applications each part can support; the attenuator covers lower and higher frequencies than the switch. |
| Attenuation range / bits | 2 dB to 30 dB, 6-bit (0.5 dB LSB) | Not applicable (switch) | Attenuation range and resolution define the signal-level control capability; a switch has no attenuation function, so this parameter is only meaningful for the DSA. |
| Insertion loss | ~1.6 dB at 20 GHz (typical) | ~1.5 dB at 20 GHz (typical) | Insertion loss directly impacts system link budget; lower loss preserves signal power through the component. |
| Isolation / return loss | Return loss ~15 dB (typical) | Isolation ~45 dB at 20 GHz (typical) | Isolation and return loss characterize signal leakage and impedance matching; the switch provides port-to-port isolation while the attenuator is specified mainly by return loss. |
| Control interface | Serial (SPI) / parallel control | Single control voltage (TTL/CMOS) | The control interface affects how the part is driven in a system; the DSA requires digital programming while the switch uses a simple logic control line. |
| Supply voltage | 3.3 V (typical) | 3.3 V (typical) | Supply voltage compatibility determines whether the part can share the same rail as surrounding circuitry. |
| Package | 24-lead LGA (BCCZN) | 20-lead LGA (BCCZN) | Package footprint and pin count affect PCB layout and board-level interchangeability. |
| Operating temperature range | -40 °C to +85 °C | -40 °C to +85 °C | The temperature range confirms suitability for industrial and commercial environments. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADRF5020BCCZN-R7 | ADRF5721BCCZN |
|---|---|---|
| Part Status | Active | Active |
| RF Type | VSAT | - |
| Topology | Absorptive | - |
| Circuit | SPDT | - |
| Frequency Range | 100MHz ~ 30GHz | 9 kHz ~ 40 GHz |
| Isolation | 65dB | - |
| Insertion Loss | 2dB | - |
| Test Frequency | 20GHz | - |
| P1d B | 28dBm | - |
| IIP3 | 52dBm | - |
| Impedance | 50Ohm | 50 Ohms |
| Voltage - Supply | 5.5V | - |
| Operating Temperature | -40°C ~ 85°C | - |
| Attenuation Value | - | 2dB ~ 30dB |
Frequently asked questions
What are the primary functional differences between the ADRF5721BCCZN and the ADRF5020BCCZN-R7?
The ADRF5721BCCZN is a silicon-on-insulator (SOI) digital attenuator, while the ADRF5020BCCZN-R7 is a non-reflective silicon-on-insulator (SOI) SPDT switch. The ADRF5721 provides attenuation control, whereas the ADRF5020 routes RF signals between two paths.
What is the operating frequency range for each device?
The ADRF5721BCCZN operates from 9 kHz to 40 GHz. The ADRF5020BCCZN-R7 operates from 100 MHz to 30 GHz. These ranges are specified in the respective Analog Devices datasheets.
Are the ADRF5721BCCZN and ADRF5020BCCZN-R7 pin-compatible or package-compatible?
No. The ADRF5721BCCZN is supplied in a 24-terminal LGA package, while the ADRF5020BCCZN-R7 is supplied in a 20-terminal LGA package. The pin counts, pin functions, and package dimensions differ, so they are not drop-in replacements for each other.
What are the typical insertion loss specifications for these components?
The ADRF5721BCCZN exhibits an insertion loss of approximately 1.6 dB at 20 GHz and 2.4 dB at 40 GHz in its minimum attenuation state. The ADRF5020BCCZN-R7 exhibits an insertion loss of approximately 1.5 dB at 20 GHz and 2.0 dB at 30 GHz. Refer to the manufacturer datasheets for the complete frequency-dependent curves.
What control interface do these devices use?
Both the ADRF5721BCCZN and the ADRF5020BCCZN-R7 use a parallel CMOS-/TTL-compatible control interface. The ADRF5721 uses a 6-bit control word for attenuation setting, while the ADRF5020 uses a single control voltage for switch state selection.
What are the power handling capabilities of each part?
The ADRF5721BCCZN is specified for an input power of up to 30 dBm (1 W) in continuous wave operation. The ADRF5020BCCZN-R7 is specified for an input power of up to 33 dBm (2 W) in continuous wave operation. These figures are subject to frequency derating as detailed in the datasheets.
Can the ADRF5721BCCZN and ADRF5020BCCZN-R7 be used together in a single RF signal chain?
Yes. Because they perform different functions (attenuation versus switching), they can be cascaded in an RF signal chain. The designer must account for the combined insertion loss, impedance matching, and control signal routing for both devices.
What are the supply voltage requirements for these components?
The ADRF5721BCCZN requires a positive supply of 3.3 V and a negative supply of -3.3 V. The ADRF5020BCCZN-R7 requires a positive supply of 3.3 V and a negative supply of -3.3 V. Both devices also require a logic supply voltage for the control interface, as specified in their respective datasheets.