SP5655

SP5655 2·7GHz Bidirectional I2C Bus Controlled Synthesiser Advance Information Supersedes July 1996 version, DS3743-4.3 DS3743 - 5.0 June 1998 The SP5655 is a single chip frequency synthesiser designed for TV tuning systems. Control data is entered in the standard I2C BUS format. The device contains 2 addressable current limited outputs and 4 addressable bidirectional open-collector ports, one of which is a 3-bit ADC. The information on these ports can be read via the I2C BUS. the device has one fixed I 2 C BUS address and 3 programmable addresses, programmed by applying a specific input voltage to one of the current limited outputs. This enables two or more synthesisers to be used in a system. CHARGE PUMP CRYSTAL Q1 CRYSTAL Q2 SDA SCL 1 2 3 4 5 6 7 8 16 15 14 13 DRIVE OUTPUT VEE RF INPUT RF INPUT VCC P0 OUTPUT PORT P3 OUTPUT PORT/ ADD SELECT I/O PORT P4 † SP5655 12 11 10 9 † I/O PORT P7 * I/O PORT P6 FEATURES † I/O PORT P5 s s s s s s s s s s s s s Complete 2·7GHz Single Chip System High Sensitivity RF Inputs Programmable via I2C BUS Low Power Consumption (5V, 30mA) Low Radiation Phase Lock Detector Varactor Drive Amp Disable 6 Controllable Outputs, 4 Bidirectional 5-Level ADC Variable I2C BUS Address for Multi-tuner Applications ESD Protection: 4kV, Mil-Std-883C, Method 3015 (1) Switchable 4512/1024 Reference Divider Pin and Function Compatible with SP5055S (2) MP16 † = Logic level I/O port * = 3-bit ADC input Fig. 1 Pin connections – top view APPLICATIONS s...