Overview
The HMC795LP5ETR from Analog Devices Inc. is a variable gain, direct quadrature modulator designed for a wide range of digital modulation applications. It operates across a frequency range of 50 to 2800 MHz, making it suitable for various wireless communication systems, including Cellular/3G, Broadband Wireless Access, and ISM circuits. The modulator is housed in a compact 5x5mm (LP5) SMT QFN package, offering high integration, low carrier feedthrough, and a cost-effective alternative to more complex double upconversion architectures.
Key Specifications
| Parameter | Value |
|---|---|
| RF Frequency Range | 50 - 2800 MHz |
| LO Frequency Range | 100 - 5600 MHz |
| LO Drive Level | -9 to +3 dBm |
| Baseband Input Frequency | DC - 440 MHz |
| Gain Control Range | -31.5 to 0 dB |
| Gain Control Step | 0.5 dB (adjustable with SPI) |
| Output Power (P1dB) | +10 dBm |
| Output IP3 | +22 dBm |
| Carrier Suppression | 55 dBc |
| Sideband Suppression | 53 dBc |
| Analog Supply Voltage | 4.5 - 5.5 V |
| Package Type | 32 Lead 5x5 mm QFN |
Key Features
- High linearity with OIP3 of +22 dBm and output power of +10 dBm
- Low carrier feedthrough and high sideband suppression
- 6-bit digital controlled variable gain amplifier providing up to 32 dB of gain control in 0.5 dB steps
- Gain control interface supports three-wire serial input or 6-bit parallel word, and SPI for fine-tuning gain steps
- Differential RF output port and baseband inputs supporting modulation from DC to 440 MHz
- Compact 5x5mm QFN package for high integration and low cost
Applications
- UMTS, GSM, or CDMA base stations
- Fixed Wireless or WLL (Wireless Local Loop) systems
- ISM transceivers (900 & 2400 MHz)
- Broadband Wireless Access systems
- GMSK, QPSK, and other digital modulation schemes
Q & A
- What is the frequency range of the HMC795LP5ETR? The HMC795LP5ETR operates from 50 to 2800 MHz.
- What is the LO drive level requirement? The LO drive level is -9 to +3 dBm.
- What is the baseband input frequency range? The baseband input frequency range is from DC to 440 MHz.
- How is the gain control managed? The gain control is managed through a 6-bit digital controlled variable gain amplifier, with options for three-wire serial input, 6-bit parallel word, and SPI interface.
- What is the output power and IP3 of the HMC795LP5ETR? The output power (P1dB) is +10 dBm, and the output IP3 is +22 dBm.
- What are the carrier and sideband suppression levels? The carrier suppression is 55 dBc, and the sideband suppression is 53 dBc.
- What is the package type of the HMC795LP5ETR? The package type is a 32 Lead 5x5 mm QFN.
- What are the typical applications of the HMC795LP5ETR? Typical applications include UMTS, GSM, CDMA base stations, fixed wireless systems, ISM transceivers, and broadband wireless access systems.
- What is the analog supply voltage range for the HMC795LP5ETR? The analog supply voltage range is 4.5 to 5.5 V.
- Can the gain steps be adjusted? Yes, the gain steps can be adjusted using the SPI interface to as low as 0.1 dB, with reduced range, or to adjust individual gain steps for system linearization.
