SDA4336 Infineon Technologies Corporation, SDA4336 Datasheet - Page 17

• Manufacturer Part Number: SDA4336
• Description: PLL Frequency Synthesizer, if Counter, 7 Bit ADC, 7 & 4 Bit DAC With Two Channel Digital Alignment
• Manufacturer: Infineon Technologies Corporation

Data Transition:
Data Transfer Write Mode:
Data Transfer Read Mode:
R / N Counter
Three State Phase Comparator
Charge Pump
Loop Amp
Semiconductor Group
Data transition on the pin SDA must only occur when the clock SCL is low. To transfer data to / from
the device, BUS_ENA (which must start inactive high) is taken low, a serial transfer is made via
SDA, CLK and BUS_ENA is taken back high. The bit stream needs neither the chip address.
To start the communication, the BUS_ENA is taken low. The desired sub address byte and data
bytes must be followed. The subaddresses determines which one of the 11 data bytes (00H...07H,
09H .. 0BH) is transmitted first. At the end of data transition the BUS_ENA must be high.
To start the communication in the read mode, the BUS_ENA is taken low, followed by the sub
address read (82H or 83H). After that the device is ready to read out the 16bit data register 82H or
the 8bit data register 83H. At the end of data transition the BUS_ENA must be high.
The SDA 4336 has 2 identical 16bit counter for R and N path. Input frequency for the R-counter is
the buffered XTAL-frequency (61.5MHz). Tuning steps can be selected by the 16bit R-counter from
f
98.2MHz...118.7MHz).
The phase comparator generates a phase error signal according to phase difference between f
counter output) and f
generator. Polarity is fixed positiv for this application note.
The charge pump generates signed pulses of current. 4 current values and 2 outputs are available.
The integrated rail to rail loop amplifier allows an active loop filter design with external components.
Two modes are avialiable with status bit D11: high speed and normal mode.
R
= 6.25kHz...100kHz. Input frequency for the N-counter is the buffered LO-frequency (in FM mode
N
(N counter output).This phase error signal drives the charge pump current
Specification
17
SDA 4336
21.5.99
R
(R