Overview
The HMC759LP3E is a 7-bit BiCMOS digital attenuator produced by Analog Devices Inc. This component is housed in a low-cost, leadless 3x3 mm QFN package and is designed for a wide range of RF and IF applications. It features a CMOS/TTL compatible control interface with a three-wire serial input and supports near DC operation through off-chip AC ground capacitors. The attenuator is RoHS compliant and occupies only 9 mm², making it highly versatile and compact.
Key Specifications
| Parameter | Frequency (MHz) | Min. | Typ. | Max. | Units |
|---|---|---|---|---|---|
| Insertion Loss | 10 - 300 | 3.3 | 4.5 | dB | |
| Attenuation Range | 10 - 300 | 31.75 | dB | ||
| Return Loss (RF1, RF2, All Atten. States) | 10 - 300 | 10 | dB | ||
| Attenuation Accuracy | 10 - 300 | ± (0.05 + 1.5% of Atten. Settling) | dB | ||
| Input Power for 1 dB Compression | 10 - 50 | 20 | dBm | ||
| 50 - 300 | 21 | dBm | |||
| Input Third Order Intercept Point (Two-Tone Input Power = 0 dBm Each Tone) | 10 - 50 | 39 | dBm | ||
| 50 - 300 | >40 | dBm | |||
| Bias Current (Idd1 + Idd2) | 10 - 300 | 300 | 650 | 1000 | µA |
| Switching Time (50% LE to 90% RF) | 10 - 300 | 15 | ns |
Key Features
- 7-bit digital attenuator with 0.25 dB least significant bit (LSB) step size.
- Attenuation range of 31.75 dB.
- CMOS/TTL compatible three-wire serial control interface (SERIN, CLK, LE).
- User-selectable power-up states.
- Serial output port for cascading other serial-controlled components.
- Off-chip AC ground capacitors for near DC operation.
- RoHS compliant 3x3 mm QFN leadless package.
- DC coupled and matched to 50 Ohms with blocking capacitors required.
Applications
The HMC759LP3E is ideal for a variety of RF and IF applications, including:
- Wireless infrastructure (base stations, repeaters).
- Test and measurement equipment.
- Microwave and millimeter-wave systems.
- Satellite communications.
- Radar systems.
Q & A
- What is the attenuation range of the HMC759LP3E?
The HMC759LP3E has an attenuation range of 31.75 dB.
- What is the step size of the attenuator?
The step size is 0.25 dB.
- What is the frequency range of operation for the HMC759LP3E?
The component operates from 10 MHz to 300 MHz.
- What type of control interface does the HMC759LP3E use?
The control interface is CMOS/TTL compatible and uses a three-wire serial input (SERIN, CLK, LE).
- What is the package type and size of the HMC759LP3E?
The component is housed in a 3x3 mm QFN leadless package.
- Is the HMC759LP3E RoHS compliant?
Yes, the HMC759LP3E is RoHS compliant.
- What is the typical switching time of the HMC759LP3E?
The typical switching time is 15 ns.
- What is the input power for 1 dB compression?
The input power for 1 dB compression is 20 dBm for frequencies between 10 MHz and 50 MHz, and 21 dBm for frequencies between 50 MHz and 300 MHz.
- What is the input third-order intercept point (IP3) of the HMC759LP3E?
The IP3 is 39 dBm for frequencies between 10 MHz and 50 MHz, and greater than 40 dBm for frequencies between 50 MHz and 300 MHz.
- What are the typical bias currents for the HMC759LP3E?
The typical bias current (Idd1 + Idd2) is 650 µA.
