MGP 3006X GHz PLL with I2C Bus and Four Chip Addresses Bipolar IC Features ● ● ● ● ● ● 1-chip system for MPU-control (I2C Bus) 4 programmable chip addresses Short pull-in time for quick channel switch-over and optimized loop stability 2 high-current band switch outputs (20 mA) Software-compatible with SDA 3202 series Oxis III technology P-DSO-14-1 Type Ordering Code Package MGP 3006X Q67000-H5114 P-DSO-14-1 (SMD) MGP 3006X Q67006-H5114 P-DSO-14-1 Tape & Reel (SMD) Combined with a VCO (tuner), the MGP 3006X device, with four hard-switched chip addresses, forms a digitally programmable phase-locked loop for use in television sets with PLL-frequency synthesis tuning. The PLL permits precise crystal-controlled setting of the frequency of the tuner oscillator between 16 and 1300 MHz in increments of 62.5 kHz, and, with a 2.4-GHz prescaler 1/2, in the TV-SAT band in increments of 125 kHz. The tuning process is controlled by a microprocessor via an I2C Bus. The I2C Bus noise immunity has been improved by a factor of 10 compared to the SDA 3202-2, and the new crystal oscillator generates a sinusoidal signal, suppressing the higher-order harmonics, which reduces the moiré noise considerably. Semiconductor Group 1 04.93 MGP 3006X Circuit Description Tuning Section UHF/VHF The tuner signal is capacitively coupled at the UHF/VHF-input and subsequently amplified. REF The reference input REF should be decoupled to ground using a capacitor of low series inductance. The signal passes through an asynchronous divider with a fixed ratio of P = 8, an adjustable divider with ratio N = 256 through 32767, and is then compared in a digital frequency/phase detector to a reference frequency fREF = 7.8125 kHz. Q1, Q2 This frequency is derived from a balanced, low-impedance 4-MHz crystal oscillator (pin Q1, Q2) by dividing its output signal by Q = 512. The phase detector has two outputs UP and DOWN that drive the two current sources I+ and I– of a charge pump. If the negative edge of the divided VCO-signal appears prior to the negative edge of the reference signal, the I+ current source pulses for the duration of the phase difference. In the reverse case the I– current source pulses. PD, UD If the two signals are in phase, the charge pump output (PD) goes into the high-impedance state (PLL is locked). An active low-pass filter integrates the current pulses to generate the tuning voltage for the VCO (internal amplifier, external output transistor at UD and external RC-circuitry). The charge pump output is also switched into the high-impedance state when the control bit T0 = 1. Here it should be noted, however, that the tuning voltage can alter over a long period in the high-impedance state as a result of self-discharge in the peripheral circuitry. UD may be switched off by the control bit OS to allow external adjustments. By means of a control bit 5I the pump current can be switched between two values by software. This programmability permits alteration of the control response of the PLL in the locked-in state. In this way different VCO-gains in the different TV-bands can be compensated, for example. P1, P2 The software-switched outputs P1, P2 can be used for direct band selection (20 mA current output). P7 P7 is a general-purpose open-collector output. The test bit T1 = 1 switches the test signal Cy (divided input signal) to P7. CAU Four different chip addresses can be set by appropriate connection of pin CAU. Semiconductor Group 2 MGP 3006X I2C Bus Interface Data are exchanged between the processor and the PLL on the I2C Bus. SCL, SDA The clock is generated by the processor (input SCL), while pin SDA works as an input or output depending on the direction of the data (open collector; external pull-up resistor). Both inputs have hysteresis and a low-pass characteristic, which enhances the noise immunity of the I2C Bus. The data from the processor pass through an I2C Bus control. Depending on their function the data are subsequently stored in registers. If the bus is free, both lines will be in the marking state (SDA, SCL are high). Each telegram begins with the start condition and ends with the stop condition. Start condition: SDA goes low, while SCL remains high. Stop condition: SDA goes high while SCL remains high. All further information transfer takes place during SCL = low, and the data is forwarded to the control logic on the positive clock edge. The table “bit allocation” should be referred to in the following paragraph. All telegrams are transmitted byte-by-byte, followed by a ninth clock pulse, during which the control logic returns the SDA-line to low (acknowledge condition). The first byte is comprised of seven address bits. These are used by the processor to select the PLL from several peripheral components (chip select). The eighth bit is always low. In the data portion of the telegram the first bit of the first or third data byte determines whether a divider ratio or control information is to follow. In each case the second byte of the same data type or a stop condition has to follow the first byte. VS, GND When the supply voltage is applied a power-on reset circuit prevents the PLL from setting the SDA-line to low, which would block the bus. Semiconductor Group 3 MGP 3006X Circuit Description (cont’d) Bit Allocation MSB A = Acknowledge Address byte 1 1 0 0 0 MA1 MA0 0 A Prog. divider Byte 1 0 n14 n13 n12 n11 n10 n9 n8 A Prog. divider Byte 2 n7 n6 n5 n4 n3 n2 n1 n0 A Control info. Byte 1 1 5I T1 T0 1 1 1 OS A Control info. Byte 2 P7 X X X X P2 P1 X A Divider Ratio N = 16384 × n14 + 8192 × n13 + 4096 × n12 + 2048 × n11 + 1024 × n10 + 512 × n9 + 256 × n8 + 128 × n7 + 64 × n6 + 32 × n5 + 16 × n4 + 8 × n3 + 4 × n2 + 2 × n1 + n0 Band Selection P1, P2, P7 = 1 Open-collector output is active. Pump Current Programming 5I = 1 High current UD Disable OS = 1 UD is disabled. Test Mode T1, T0 = 0, 0 T1 = 1 T0 = 1 Semiconductor Group Normal operation P7 = carry Cy of programmable divider Tristate: charge pump output PD is in high-impedance state. 4 MGP 3006X Chip Address Switching MA1 MA0 Voltage at CAU 0 0 (0 … 0.1) VS 0 1 open-circuit 1 0 (0.4 … 0.6) VS 1 1 (0.9 … 1) VS Telegram Examples Start-Addr-DR1-DR2-CW1-CW2-Stop Start-Addr-CW1-CW2-DR1-DR2-Stop Start-Addr-DR1-DR2-CW1-Stop Start-Addr-CW1-CW2-DR1-Stop Start-Addr-DR1-DR2-Stop Start-Addr-CW1-CW2-Stop Start-Addr-DR1-Stop Start-Addr-CW1-Stop Semiconductor Group Start Addr DR1 DR2 CW1 CW2 Stop 5 = = = = = = = start condition address divider ratio 1st byte divider ratio 2nd byte control word 1st Byte control word 2nd Byte stop condition MGP 3006X Pin Configuration (top view) Semiconductor Group 6 MGP 3006X Pin Definitions and Functions Pin No. Symbol Function 1 PD Input active filter/charge pump output 2 Q1 Quartz crystal 3 Q2 Quartz crystal 4 SDA Data input/output for I2C Bus 5 SCL Clock input for I2C Bus 6 P7 Port output (open collector) 7 CAU Address switch input 8 P2 Port output (open collector) 9 P1 Port output (open collector) 10 VS Supply voltage 11 UHF/VHF Signal input 12 REF Amplifier reference input 13 GND Ground 14 UD Output active filter Semiconductor Group 7 MGP 3006X Block Diagram Semiconductor Group 8 MGP 3006X Absolute Maximum Ratings TA = – 20 to 80 °C Parameter Symbol Limit Values min. max. Unit Remarks Supply voltage VS – 0.3 6 V Output PD V1 – 0.3 VS V Crystal oscillator pins Q1, Q2 V2 – 0.3 VS V Bus input/output SDA V4 – 0.3 6 V Bus input SCL V5 – 0.3 6 V Port outputs P1, P2, P7 V6 – 0.3 16 V Chip address switch CAU V7 – 0.3 VS V Signal input UHF/VHF V11 – 0.3 0.3 V for VS = 0 V Reference input REF V12 – 0.3 0.3 V for VS = 0 V Output active filter UD V14 – 0.3 VS V Bus output SDA I4L –1 5 mA open collector Port outputs P7 I6L –1 7 mA open collector Port outputs P1, P2 I8L –1 20 mA open collector Total port output current ΣIL 25 mA Junction temperature Tj 125 °C Storage temperature Tstg 125 °C Thermal resistance (junction to ambient) Rth JA 125 K/W Semiconductor Group – 40 9 MGP 3006X Absolute Maximum Ratings (cont’d) TA = – 20 to 80 °C Parameter Symbol Limit Values min. max. Unit Remarks Operating Range Supply voltage VS 4.5 5.5 V Ambient temperature TA – 20 80 °C Input frequency f11 16 1300 MHz (at 25 °C) Crystal frequency f2 4 MHz Programmable divider factor N 256 32767 AC/DC Characteristics TA = – 20 to 80 °C; VS = 4.5 to 5.5 V Parameter Symbol Limit Values min. Supply current IS Crystal oscillator frequency f2 typ. max. 37 55 3.999754.000 Unit Test Condition Test Circuit mA VS = 5 V 1 series capacitance 18 pF, fQ = 4 MHz 1 4.00025MHz Oscillator amplitude (voltage across crystal) 2.61) Vpp Margin from 1st (fundamental) to 2nd and 3rd harmonics 201) dB Signal Input UHF/VHF Sensitivity a11 a11 a11 3/315 3/315 3/315 — 27/10 — 27/10 — 20/22 Notes see page 11. Semiconductor Group 10 dBm/2) f11 = 70 … 500 MHz dBm/2) f11 = 1000 MHz dBm/2) f11 = 1100 MHz 2 2 2 MGP 3006X AC/DC Characteristics (cont’d) TA = – 20 to 80 °C; VS = 4.5 to 5.5 V Parameter Symbol Limit Values min. typ. Unit Test Condition Test Circuit max. Port Output P7 (switch with open collector)3) H-input current I6H 10 µA V6H = 13.5 V 4 L-output voltage V6L 0.5 V I6L = 1.7 mA 4 Port Outputs P1, P2 (switch with open collector)3) H-input current I8H 10 µA V8H = 13.5 V 3 L-output voltage V8L 0.5 V I8L = 20 mA 3 Phase-Detector Output PD (VS = 5 V) Pump current Pump current I1H I1H ± 90 ± 22 ± 220 ± 50 ± 300 ± 75 µA µA 5I = high; V1 = 2 V 5I = low; V1 = 2 V 5 5 Tristate current I1Z –5 0 5 nA T1 = 1; V1 = 2 V 5 Output voltage V1L 1.0 2.5 V locked 5 µA V14 = 0.8 V; I1H = 90 µA 5 100 500 mV mV V1L = 0 V OS = 1; 5 5 50 50 µA µA V7H = 5 V V7H = 5 V 7 7 Active Filter Output UD (Test mode T0 = 1; PD = tristate) Output current – I14 Output voltage Output voltage V14 V14 500 Chip Address Switch CAU Input current Input current I7H – I7H 1) Design note only: no 100 % final inspection. 2) mVrms into 50 Ω. 3) The sum of the currents in ports P1, P2, P7 may not exceed 25 mA. Semiconductor Group 11 MGP 3006X AC/DC Characteristics (cont‘d) TA = – 20 to 80 °C; VS = 4.5 to 5.5 V; refer to test circuit 6 Parameter Symbol Limit Values min. typ. Unit Test Condition max. Bus Inputs SCL, SDA H-input voltage V4IH L-input voltage 3 5.5 V V4IL 1.5 V H-input current I4IH 10 µA V4IH = VS L-input current – I4IL 20 µA V4IL = 0 V Bus Output SDA (open collector) H-output current I4OH 10 µA V4OH = 5.5 V L-output voltage V4OL 0.4 V I4OL = 3 mA Rise time tR 1 µs Fall time tF 0.3 µs 100 kHz Edges SCL, SDA Shift Clock SCL Frequency f5 0 H-pulse width t5H 4 µs L-pulse width t5L 4.7 µs Set-up time tSUSTA 4.7 µs Hold time tHDSTA 4 µs Set-up time tSUSTO 4.7 µs Bus free tBUF 4.7 µs Start Stop Semiconductor Group 12 MGP 3006X AC/DC Characteristics (cont‘d) TA = – 20 to 80 °C; VS = 4.5 to 5.5 V; refer to test circuit 6 Parameter Symbol Limit Values min. typ. Unit max. Data Transfer Set-up time tSUDAT 0.25 µs Hold time tHDDAT 0 µs Input hysteresis SCL, SDA1) 300 mV Low-pass cutoff frequency SCL, SDA1) 500 kHz 1) Design note only: no 100 % final inspection. Semiconductor Group 13 Test Condition MGP 3006X Crystal Oscillator Test Circuit 1 Semiconductor Group 14 MGP 3006X Calibration of Signal Generator Measurement of Input Sensitivity Test Circuit 2 Semiconductor Group 15 MGP 3006X Test Circuit 3 Test Circuit 4 Test Circuit 5 Semiconductor Group 16 MGP 3006X Test Circuit 6 I2C Bus Timing Diagram Set-up time (start) Hold time (start) H-pulse width (clock) L-pulse width (clock) Set-up time (data transfer) Hold time (data transfer) Set-up time (stop) Bus free time Fall time Rise time tSUSTA tHDSTA tHIGH tLOW tSUDAT tHDDAT tSUSTO tBUF tF tR All times related to 10 % and 90 % values. Semiconductor Group 17 MGP 3006X Test Circuit 7 Application Circuit Semiconductor Group 18 MGP 3006X Loop Filter Loop Filter Calculation Loop bandwidth: Attenuation: ωR = √[(IP × KVCO) / (C1 × P × N)] a = 0.5 × ωR × R × C1 P = N = IP = KVCO = R, C 1 = prescaler division ratio programmable division ratio charge pump current tuner slope loop filter Example for channel 47: P = 8, N = 11520, IP = 50 µA, KVCO = 18.7 MHz/V, R = 22 kΩ, C1 = 180 nF, ωR = 237 Hz, fR = 38 Hz, a = 0.47 Note: The high-impedance port outputs and CAU can be decoupled from external noise with a capacitor of 1 nF. It is important to keep to the I2C Bus specification concerning maximum capacitance and impedance. Semiconductor Group 19 MGP 3006X Diagrams Sensitivity at UHF/VHF-Input I2C Bus Noise Immunity Sinusoidal noise pulses are applied via a coupling capacitance of 33 pF to the SCL- and SDA-inputs. Semiconductor Group 20 MGP 3006X Plastic Package, P-DSO-14-1 (SMD) (Plastic Dual Small Outline) GPS05093 Sorts of Packing Package outlines for tubes, trays etc. are contained in our Data Book “Package Information” SMD = Surface Mounted Device Semiconductor Group 21 Dimensions in mm