U2896B is a modulation PLL for GSM, DCS and PCS systems. The device integrates a mixer, an I/Q modulator, a phase-frequency detector (PFD) with two synchronous programmable dividers, and a charge pump. The U2896B is designed for cellular phones such as GSM900, DCS1800, and PCS1900, applying a transmitter architecture at which the VCO operates at the TX output frequency. No duplexer is needed since the out-of-band noise is very low. The U2896B exhibits low power consumption. Broadband operation provides high flexibility for multi-band frequency mappings. The IC is available in a shrinked small-outline 36-pin package (SSO36).
The U2896B is a monolithic integrated circuit manufactured using Atmel's advanced silicon bipolar UHF5S technology. It integrates a mixer, an I/Q modulator, a phase-frequency detector (PFD) with two synchronous programmable dividers, and a charge pump.
| Current consumption (Active) | 40 mA |
|---|---|
| Ambient temperature range | -20 to +85 °C |
| Package type | SSO36 |
| PFD operation frequency range | 50 to 300 MHz |
The device operates within an ambient temperature range of -20 to +85 °C.
In standby mode, the supply current is 20 pA for the main supplies and 30 pA for the mixer supply.
The charge pump supply voltage must be between 2.7 V and 5.5 V.