Overview
The MMDS20254HT1, produced by NXP USA Inc., is an Advanced Doherty Alignment Module (ADAM) designed for use in base station transmitters. This integrated module is specifically tailored to work in conjunction with high power Doherty amplifiers, enabling accurate alignment of phase and amplitude on the carrier and peaking amplifiers. This ensures performance consistency, particularly in asymmetric implementations. The module operates within the frequency range of 1800 to 2200 MHz, making it suitable for various wireless communication protocols such as GSM, W-CDMA, UMTS, and LTE.
Key Specifications
| Characteristic | Value | Unit |
|---|---|---|
| Frequency | 1800-2200 | MHz |
| Maximum RF Input Power | 25 | dBm (CW) |
| Insertion Loss | — 5.5 — | dB |
| Phase Shifters | 7° per Bit, 49° Maximum Range | |
| Attenuators | 0.5 dB Step, 7.5 dB Maximum Range | |
| Supply Voltage | 4.5-5.5 | V |
| Supply Current | 12 | mA |
| Operating Temperature | -65 to +150 | °C (Storage) |
| Junction Temperature | 150 | °C |
| Package Type | 32-Pin, 6 mm QFN Surface Mount Plastic Package |
Key Features
- Contains a 90° coupler, digitally selectable phase shifters, and step attenuators.
- Operates from a single 5 Volt supply.
- Low loss power splitter.
- Programmable attenuators and phase shifters.
- Power up into a selectable state.
- 50 Ohm operation (no external matching required).
- TTL/CMOS/SPI interface (1.8 V, 3.3 V logic).
- Cost-effective packaging in a 32-pin, 6 mm QFN surface mount plastic package.
Applications
The MMDS20254HT1 is primarily used in base station transmitters for wireless communication systems. It is compatible with various protocols such as GSM, W-CDMA, UMTS, and LTE, making it a versatile component for different cellular network infrastructures. Its ability to ensure accurate phase and amplitude alignment in Doherty amplifiers enhances the efficiency and linearity of the transmission system.
Q & A
- What is the frequency range of the MMDS20254HT1?
The MMDS20254HT1 operates within the frequency range of 1800 to 2200 MHz. - What is the maximum RF input power for the MMDS20254HT1?
The maximum RF input power is 25 dBm (CW). - What type of interface does the MMDS20254HT1 use?
The module uses a serial peripheral interface (SPI) and supports TTL/CMOS logic. - What is the supply voltage range for the MMDS20254HT1?
The supply voltage range is 4.5 to 5.5 volts. - What are the key components included in the MMDS20254HT1?
The module includes a 90° coupler, digitally selectable phase shifters, and step attenuators. - What are the typical applications of the MMDS20254HT1?
The module is used in base station transmitters for GSM, W-CDMA, UMTS, and LTE wireless communication systems. - What is the package type of the MMDS20254HT1?
The module is packaged in a 32-pin, 6 mm QFN surface mount plastic package. - Does the MMDS20254HT1 require external matching?
No, the module operates at 50 Ohms and does not require external matching. - What is the maximum junction temperature for the MMDS20254HT1?
The maximum junction temperature is 150°C. - How is the MMDS20254HT1 controlled?
The module is controlled using a serial peripheral interface (SPI).
