Philips TSA5055T Datasheet

INTEGRATED CIRCUITS

DATA SH EET

TSA5055T

2.5 GHz bi-directional I controlled synthesizer

Product speciﬁcation File under Integrated Circuits, IC02

C-bus

November 1991

Philips Semiconductors Product speciﬁcation

2.5 GHz bi-directional I2C-bus controlled synthesizer

GENERAL DESCRIPTION

The TSA5055T is a single chip PLL frequency synthesizer designed for satellite TV tuning systems. Control data is entered via the I2C-bus; five serial bytes are required to address the device, select the oscillator frequency, program the six output ports and set the charge-pump current. Four of these ports can also be used as input ports (3 general purpose I/O ports, one A/D converter). Digital information concerning these ports can be read out of the TSA5055T on the SDA line (one status byte) during a READ operation. A flag is set when the loop is “in-lock” and is read during a READ operation. The device has one fixed I2C-bus address and 3 programmable addresses, programmed by applying

a specific voltage to port 3. The phase comparator operates at 7.8125 kHz when a 4 MHz crystal is used.

FEATURES

• Complete 2.5 GHz single-chip system

• Low power 5 V, 60 mA

• I

C-bus programming

• In-lock flag

• Varicap drive disable

• Low radiation

• 5-level A/D converter

• Address selection for

Picture-In-Picture (PIP), DBS tuner, etc.

TSA5055T

• 6 controllable outputs, 4 bi-directional

• Power-down flag

• Available in SOT109A package

APPLICATIONS

• Satellite TV

• High IF cable tuning systems

QUICK REFERENCE DATA

SYMBOL PARAMETER MIN. TYP. MAX. UNIT

supply voltage 4.75 5 5.5 V

supply current − 60 80 mA ∆f frequency range 1 − 2.5 GHz V

I (RMS)

input voltage level (RMS value)

1 GHz to 1.8 GHz 50 − 300 mV

1.8 GHz to 2.6 GHz 70 − 300 mV

XTAL

crystal oscillator 3.2 4 4.48 MHz

open−collector output current

P7, P6, P5, P4 −−10 mA

output current

P3, P0 − 1 − mA T T R

amb stg th j-a

operating ambient temperature range −10 − 70 °C

storage temperature range −40 − 125 °C

thermal resistance − 110 − K/W

ORDERING INFORMATION

EXTENDED

TYPE NUMBER

PINS PIN POSITION MATERIAL CODE

TSA5055T 16 SO PLASTIC SOT109A

PACKAGE

(1)

Note

1. SOT109-1; 1996 December 5. November 1991 2

Philips Semiconductors Product speciﬁcation

2.5 GHz bi-directional I2C-bus controlled synthesizer

TSA5055T

November 1991 3

Fig.1 Block diagram.

Philips Semiconductors Product speciﬁcation

2.5 GHz bi-directional I2C-bus controlled synthesizer

TSA5055T

LIMITING VALUES

In accordance with Absolute Maximum System (IEC 134).

SYMBOL PARAMETER MIN. MAX. UNIT

P13

P16

stg

supply voltage −0.3 6 V charge-pump output voltage −0.3 V crystal (Q1) input voltage −0.3 V

CC CC

serial data input/output −0.3 6 V serial clock input −0.3 6 V input/output ports P7 - P0 −316V prescaler inputs −0.3 2.5 V drive output −0.3 V

output ports P7 - P4 (open collector) −115mA SDA output (open collector) −15 mA storage temperature range −40 125 °C junction temperature − 150 °C

THERMAL RESISTANCE

V V

SYMBOL PARAMETER THERMAL RESISTANCE

th j-a

from junction to ambient in free air 110 K/W

HANDLING

Every pin withstands the ESD test in accordance with MIL-STD-883C, category A (1000 V).

November 1991 4

Philips Semiconductors Product speciﬁcation

2.5 GHz bi-directional I2C-bus controlled synthesizer

PINNING

SYMBOL PIN DESCRIPTION

PD 1 charge-pump output Q1 2 crystal oscillator input 1 Q2 3 crystal oscillator input 2 SDA 4 serial data input/output SCL 5 serial clock input P7 6 port output/input (general purpose) P6 7 port output/input (A/D converter) P5 8 port output/input (general purpose) P4 9 port output/input (general purpose) P3 10 port output/input (address selection) P0 11 port output V

IN1

IN2

GND 15 ground UD 16 drive output

12 voltage supply 13 UHF/VHF signal input 1 14 UHF/VHF signal input 2 (decoupled)

TSA5055T

Fig.2 Pinning diagram.

FUNCTIONAL DESCRIPTION

The TSA5055T is controlled via the two-wire I2C-bus. For programming, there is one module address (7 bits) and the R/W bit for selecting READ or WRITE mode.

WRITE mode: R/

W = 0 (see Table 1)

After the address transmission (first byte), data bytes can be sent to the device. Four data bytes are needed to fully program the TSA5055T. The bus transceiver has an auto-increment facility that permits the programming of the TSA5055T within one single transmission (address + 4 data bytes).

The TSA5055T can also be partly programmed on the condition that the first data byte following the address is

byte 2 or byte 4. The meaning of the bits in the data bytes is given in Table 1. The first bit of the first data byte transmitted indicates whether frequency data (first bit = 0) or charge pump and port information (first bit = 1) will follow. Until an I

C-bus STOP condition is sent by the controller, additional data bytes can be entered without the need to re-address the device. This allows a smooth frequency sweep for fine tuning. At power-on, the ports are set to the high impedance state.

The 7.8125 kHz reference frequency is obtained by dividing the output of the 4 MHz crystal oscillator by 512. Because the input of the UHF/VHF signal is first divided by 16, the step size is 125 kHz. A 3.2 MHz crystal can offer a step size of 100 kHz.

November 1991 5

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