Overview
The HMC1122LP4METR from Analog Devices Inc. is a 6-bit digital attenuator designed for high-frequency applications. It operates over a wide frequency range of 0.1 GHz to 6 GHz, offering a 31.5 dB attenuation control range in 0.5 dB steps. This device is implemented in a silicon process, ensuring fast settling times, low power consumption, and high ESD robustness. The HMC1122LP4METR is optimized for excellent step accuracy and high linearity across its frequency and temperature range, making it suitable for various RF and microwave systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Frequency Range | 0.1 GHz to 6 GHz | |
| Attenuation Control Range | 31.5 dB | |
| Attenuation Step Size | 0.5 dB | |
| Supply Voltage | 3.3 V to 5 V | |
| Supply Current (VDD = 3.3 V) | 0.3 mA | |
| Supply Current (VDD = 5.0 V) | 0.4 mA | |
| Rise and Fall Time (tRISE, tFALL) | 60 ns (10% to 90% of RF output) | |
| On and Off Time (tON, tOFF) | 150 ns (50% VCTL to 90% of RF output) | |
| 0.1 dB Settling Time | 200 ns (50% VCTL to 0.1 dB of final RF output) | |
| Input 0.1 dB Compression (P0.1dB) | 30 dBm | |
| Input Third-Order Intercept (IP3) | 55 dBm (Two-tone input power = 15 dBm each tone, Δf = 1 MHz) | |
| Package Type | 24-VFQFN Exposed Pad |
Key Features
- Internally matched RF input and output to 50 Ω, eliminating the need for external matching components.
- Bidirectional design, allowing the RF input and output to be interchangeable.
- Single supply operation from 3.3 V to 5 V with an on-chip regulator ensuring no performance change across the supply range.
- Serial and parallel control modes, selectable via the P/S pin.
- 3-wire serial peripheral interface (SPI) for serial mode control.
- User-selectable power-up state using PUP1 and PUP2 control voltage inputs.
- High ESD robustness and fast settling times.
- Compact RoHS compliant 4 mm × 4 mm LFCSP package.
Applications
The HMC1122LP4METR is suitable for a variety of high-frequency applications, including:
- RF and microwave systems requiring precise attenuation control.
- Wireless communication systems, such as base stations and repeaters.
- Test and measurement equipment where accurate signal attenuation is necessary.
- Satellite communications and radar systems.
- Other applications requiring high linearity and fast settling times over a broad frequency range.
Q & A
- What is the frequency range of the HMC1122LP4METR?
The HMC1122LP4METR operates from 0.1 GHz to 6 GHz.
- What is the attenuation control range of the HMC1122LP4METR?
The device has a 31.5 dB attenuation control range in 0.5 dB steps.
- What are the supply voltage and current requirements for the HMC1122LP4METR?
The device operates on a single supply from 3.3 V to 5 V, with a supply current of 0.3 mA at 3.3 V and 0.4 mA at 5 V.
- How is the HMC1122LP4METR controlled?
The device can be controlled in either serial or parallel mode, selectable via the P/S pin.
- What is the settling time of the HMC1122LP4METR?
The 0.1 dB settling time is 200 ns, and the 0.05 dB settling time is 250 ns.
- What is the input 0.1 dB compression point of the HMC1122LP4METR?
The input 0.1 dB compression point is 30 dBm.
- What is the input third-order intercept point (IP3) of the HMC1122LP4METR?
The input third-order intercept point is 55 dBm for two-tone input power of 15 dBm each tone, with a frequency spacing of 1 MHz.
- What package type is the HMC1122LP4METR available in?
The device is available in a 24-VFQFN Exposed Pad package.
- Is the HMC1122LP4METR RoHS compliant?
Yes, the HMC1122LP4METR is RoHS compliant.
- What are some typical applications for the HMC1122LP4METR?
Typical applications include RF and microwave systems, wireless communication systems, test and measurement equipment, and satellite communications.
