UAA2068 データシートの表示（PDF） - Philips Electronics

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UAA2068

Transmit chain and synthesizer with integrated VCO for DECT

Philips Electronics 

Philips Semiconductors

Transmit chain and synthesizer with

integrated VCO for DECT

Product specification

UAA2068G

Table 2 Bit allocation; notes 1 and 2

FIRST

IN

REGISTER BIT ALLOCATION

b15(3)

X

b14(3) b13(3) b12(3) b11(3) b10(3)

X

X

X

X

X

DATA FIELD

b9(3) b8(3) b7(4)

X

X

0

b6(5)

LAST

IN

b5 b4 b3 b2 b1 b0

main divider programming(6)

Notes

1. X = don’t care.

2. In normal operation, only 8 bits are programmed into the register.

3. For normal operation, b15 to b8 do not need to be programmed.

4. The validation bit (b7) must be programmed with zero for normal operation.

5. Bit b6 is the MSB of the main divider coefficient.

6. The main divider ratio is equal to 1024 plus the programmed value (see Table 3).

Table 3 Main divider programming

b6

b5

b4

b3

b2

b1

b0

MAIN DIVIDER

RATIO

SYNTHESIZED

FREQUENCY (MHz)

Binary equivalent of n

1024 + n

1.728 × (1024 + n)

1

0

0

0

0

0

1

1 089

1 881.792

1

0

0

1

0

1

0

1 098

1 897.344

LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 134).

SYMBOL

VCC

VCC(CP)

VCC(CP) − VCC

∆GND

Ptot

Tstg

Tamb

Tj

PARAMETER

supply voltage

charge-pump supply voltage

difference in voltage between VCC(CP) and VCC

difference in ground supply voltage applied

between all ground pins

total power dissipation

storage temperature

operating ambient temperature

junction temperature

CONDITIONS

note 1

Note

1. Pins short-circuited internally must be short-circuited externally.

MIN.

−0.3

−0.3

−0.3

−

MAX.

+5.5

+5.5

+5.5

0.3

UNIT

V

V

V

V

−

275

mW

−55

+125 °C

−10

+60

°C

−

150

°C

HANDLING

Inputs and outputs are protected against electrostatic discharge in normal handling. However, to be totally safe, it is

desirable to take normal precautions appropriate to handling MOS devices.

1998 Nov 19

9

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