ADF7901BRUZ-RL7

The ADF7901BRUZ-RL7 belongs to ADF7901, which is a low power OOK/FSK UHF transmitter designed for use in RF Remote Control Devices. The device is capable of Frequency Shift Keying (FSK) modulation on 8 different channels, selectable by 3 external control lines. OOK modulation is performed by modulating the PA control line. The on-chip VCO operates at 2 * the output frequency. The divide by 2 at the output of the VCO reduces the amount of PA feedthrough. As a result of this, OOK modulation depths of greater than 50 dB 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 additional 1.5 dB of output power is provided for the lower bank of channels to adjust for antenna performance. The CE line allows the transmitter to be powered down completely. In this mode, the leakage current is typically 0.1 µA.

The features of ADF7901 can be summarized as (1)single chip low power UHF transmitter ; (2)369.5 MHz to 395.9 MHz frequency operation using:fractional-N; PLL and fully integrated VCO ; (3)3.0 V supply voltage ; (4)data rates supported < 2.5 kbps ; (5)low current consumption 26 mA at 12 dBm ; (6)output at 384 MHz ; (7)power-down mode (< 1A) ; (8)24-lead TSSOP package.

The absolute maximum ratings of ADF7901 are (1)VDD to GND( GND = RFGND = DGND = 0 V): -0.3 V to +4.0 V ; (2)RFVDD to GND: -0.3 V to +4.0 V ; (3)digital I/O voltage to GND: -0.3 V to VDD + 0.3 V ; (4)operating temperature range: industrial (B Version):0°C to +50°C ; (5)storage temperature range: -65°C to +125°C ; (6)maximum junction temperature: 125°C ; (7)TSSOP JA thermal impedance: 150.4°C/W ; (8)lead temperature, soldering: vapor phase (60 sec): 235°C ; (9)infrared (15 sec):240°C.(Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those listed in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ). These paramters(This device is a high performance RF integrated circuit with an ESD rating of <1 kV and it is ESD sensitive. Proper precautions should be taken for handling and assembly) are got @ TA = 25°C(unless otherwise noted).