SDA4331X - Siemens

SDA4331X PLL with I2C Bus for AM/FM Receivers

The SDA 4331X is a radio PLL controlled via I2C Bus for frequency synthesis in the AM and FM range. 3 Circuit Description The reference frequency for the PLL is derived from the quartz oscillator OSC1). The R-prescaler can be adapted to quartz frequencies of 4, 8 or 10.25 MHz, respectively, yielding an internal 50 kHz reference. Programming the R-counter s.

Features

155 MHz FM and 40 MHz AM input frequency 30 mVeff AM and 50 mVeff FM sensitivity Additional open drain ports controlled by I2C Bus 2-pin quartz oscillator Fast phase detector with short anti-backlash pulses P-DSO-24-1 and polarity reversal
• Charge pump current programmable in four steps up to 4.5 mA
• Frequency resolution of 1, 5 and 10 kHz AM and 12.5, 25 and 50 kHz FM
• P-DSO-24 package Type SDA 4331X 1.2 Application Ordering Code Q67100-H5139 Package P-DSO-24-1 The SDA 4331X provides separated input and output ports for AM and FM and is well suited for extremely fast loop settling tim.