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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

SYMBOL

PARAMETER

CONDITIONS

MIN. TYP. MAX.

Charge-pump current setting resistor input; pin RSET

RSET

VSET

external resistor connected

between pin RSET and ground

regulated voltage at pin RSET

5.6

−

12

−

1.2

−

VCO

fVCO

oscillator frequency

over full temperature

940 −

960

range; note 2

GVCO

GMOD

tuning input VCO gain

modulation input VCO gain

−

45

−

−

1

−

Switch part

FTLOTXoff

isolation between LO and TX

f = 1890 MHz; note 2 −

outputs when TX preamplifier is

off (RX mode)

−50 −

FTLOTXon

isolation due to the switch when f = 1890 MHz; note 2 −

TX preamplifier is on (TX mode)

−40 −

TX preamplifier and LO buffer parts

Po(TX)

TX preamplifier output power

over full temperature

0

range; note 2

fo(TX)

output frequency on TX

preamplifier or LO buffer

1 880

Ro(TX)

TX preamplifier output resistance balanced

−

(real part of the parallel output

impedance)

Co(TX)

TX preamplifier output

balanced

−

capacitance (imaginary part of

the parallel output impedance)

FTVCOTX

VCO frequency feedthrough at

the TX output

referenced to the fo(TX) −

level; note 2

CNR25

CNR4 686

carrier-to-noise ratio at TX output carrier offset ∆f = 25 kHz −

carrier-to-noise ratio at TX output carrier offset

−

∆f = 4686 kHz

∆fo(offset)

total frequency shift due to

200 mV VCC change

disabling the synthesizer

note 2

−

measured 20 µs after

disabling the synthesizer

∆fo(drift)

frequency drift during a slot

note 2

−

Po(LO)

LO preamplifier output power

note 2

−

Ro(LO)

LO preamplifier output

balanced

−

resistance (real part of the

parallel output impedance)

Co(LO)

LO preamplifier output

balanced

−

capacitance (imaginary part of

the parallel output impedance)

3

−

150

0.5

−41

−75

−135

−

1

−14

120

0

7

1 920

−

−

−36

−

−132

±15

± 10

−

−

−

UNIT

kΩ

V

MHz

MHz/V

MHz/V

dB

dB

dBm

MHz

Ω

pF

dBc

dBc/Hz

dBc/Hz

kHz

kHz

dBm

Ω

pF

1998 Nov 19

11

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