Overview
The HMC685LP4ETR from Analog Devices Inc. is a high dynamic range passive MMIC (Monolithic Microwave Integrated Circuit) mixer with an integrated LO (Local Oscillator) amplifier. This component is designed to operate within the frequency range of 1.7 to 2.2 GHz, making it ideal for various wireless communication applications such as cellular, 3G, LTE, WiMAX, and 4G systems. The mixer is packaged in a 4x4 mm SMT (Surface Mount Technology) QFN (Quad Flat No-Lead) package, which is compact and suitable for modern high-density circuit designs.
Key Specifications
| Parameter | Min. | Typ. | Max. |
|---|---|---|---|
| Frequency Range, RF | 1.7 GHz | - | 2.2 GHz |
| Frequency Range, LO | 1.5 GHz | - | 2.2 GHz |
| Frequency Range, IF | DC | - | 500 MHz |
| Conversion Loss | 8 dB | 10 dB | 8 dB |
| Noise Figure (SSB) | 8 dB | 8 dB | 8 dB |
| LO to RF Isolation | 22 dB | 30 dB | 34 dB |
| LO to IF Isolation | 24 dB | 30 dB | 32 dB |
| RF to IF Isolation | 30 dB | 42 dB | 43 dB |
| IP3 (Input) | 35 dBm | 34 dBm | 32 dBm |
| 1 dB Compression (Input) | 25 dBm | 24 dBm | 23 dBm |
| LO Drive Input Level (Typical) | -6 dBm | - | +3 dBm |
| Supply Current Icc Total | 90 mA | 120 mA | 140 mA |
Key Features
- High dynamic range passive MMIC mixer with integrated LO amplifier.
- Operates in the frequency range of 1.7 to 2.2 GHz.
- Excellent input IP3 performance of +35 dBm for downconversion.
- Input 1 dB compression of +25 dBm, allowing for a wide range of input signal levels.
- Typical conversion loss of 8 dB.
- DC to 500 MHz IF frequency response suitable for GSM/CDMA transmit or receive frequency plans.
- Adjustable supply current for power dissipation and linearity trade-off.
- Compact 4x4 mm SMT QFN package with 24 leads.
- Pin for pin compatible with the HMC684LP4(E) for ease of design migration.
Applications
- Cellular, 3G, LTE, WiMAX, and 4G wireless communication systems.
- Basestations and repeaters.
- GSM, CDMA, and OFDM transmitters and receivers.
Q & A
- What is the frequency range of the HMC685LP4ETR?
The HMC685LP4ETR operates in the frequency range of 1.7 to 2.2 GHz.
- What is the typical conversion loss of the HMC685LP4ETR?
The typical conversion loss is 8 dB.
- What is the input IP3 performance of the HMC685LP4ETR?
The input IP3 performance is +35 dBm for downconversion.
- What is the input 1 dB compression point of the HMC685LP4ETR?
The input 1 dB compression point is +25 dBm.
- What is the typical LO drive input level for the HMC685LP4ETR?
The typical LO drive input level is -6 to +3 dBm.
- What is the supply current range for the HMC685LP4ETR?
The supply current range is 90 to 140 mA.
- What package type is the HMC685LP4ETR available in?
The HMC685LP4ETR is available in a 4x4 mm SMT QFN package with 24 leads.
- Is the HMC685LP4ETR pin for pin compatible with other models?
Yes, it is pin for pin compatible with the HMC684LP4(E).
- What are the typical applications of the HMC685LP4ETR?
The typical applications include cellular, 3G, LTE, WiMAX, and 4G wireless communication systems, basestations, repeaters, and GSM, CDMA, and OFDM transmitters and receivers.
- How does the adjustable supply current feature benefit the design?
The adjustable supply current allows for a trade-off between power dissipation and linearity performance of the converter.
