ADF7901
FEATURES
Single-chip, low power UHF transmitter 369.5 MHz to 395.9 MHz frequency operation using fractional-N PLL and fully integrated VCO 3.0 V supply voltage Data rates up to 50 kbps supported Low current consumption
26 m A at 12 d Bm output at 384 MHz Power-down mode (<1 μA) 24-lead TSSOP
High Performance ISM Band
OOK/FSK Transmitter IC
GENERAL DESCRIPTION
The ADF7901 is a low power OOK/FSK UHF transmitter designed for use in RF remote control devices. It is capable of frequency shift keying (FSK) modulation on eight different channels, selectable by three external control lines. OOK modulation is performed by modulating the PA control line.
The on-chip VCO operates at 2× the output frequency. The division by 2 at the output of the VCO reduces the amount of PA feedthrough. As a result, OOK modulation depths of greater than 50 d B are easily achievable.
The FSK_ADJ and ASK_ADJ resistors can be adjusted in the system to optimize output power for each modulation scheme. An...
