Q6275K791 View Datasheet(PDF) - Infineon Technologies

Part Name

Description

View to exact match

Q6275K791

Universal Low Power ASK/FSK Single Conversion Multi-Channel Image-Reject Receiver with Digital Baseband Processing

Infineon Technologies 

TDA523x

Functional Description

To provide data integrity within the digital units, a brown out detector monitors the digital

supply and a detected voltage drop of VDDD below approximately 2.45 V initiates a

reset.

Figure 11 illustrates a typical power supply application for a 3.3 V and a 5 V

environment.

*)

22Ω

10Ω

100n

TDA5230

10Ω

VDD5V

VDDA

VDDD

GNDA

VDDD1V5

100n

100n

GNDRF

GNDD

3.3V

100n

TDA5230

VDD5V

VDDA

VDDD

GNDA

VDDD1V5

100n

100n

GNDRF

GNDD

*)

1µ

5V

Supply-Application in 3,3V environment

Figure 11 Supply Modes

Supply-Application in 5V environment

*)

When operating in a 5V environment, the voltage-drop across the voltage

regulators 5 Æ 3.3V has to be limited, to keep the regulators in a safe

operating range. Resistive or capacitive loads (in excess to the scheme

shown above) on pins VDDA and VDDD are not recommended.

2.4.1.1 Supply Current

In Sleep Mode, the Master Control Unit switches the crystal oscillator into Low Power

Mode (all internal load capacitors are disconnected) to minimize power consumption.

Whenever the chip leaves the Sleep Mode (t1), the crystal oscillator resumes operation

in High Precision Mode and requires tCOSCsettle to settle at the trimmed frequency. At t2

the analog signal path (RF and IF section) and the RF-PLL are activated. At t3 the chip

is ready to receive data. The chip requires tRXstartup from leaving Sleep Mode and until the

receiver is ready to receive data.

A transient supply current peak may occur at t1, depending on the selected trimming

capacitance. The average supply current drawn between during tRFstartupdelay is IVDDsleep,

high.

Data Sheet

19

Version 4.0, 2007-06-01

Share Link: