UMA1021 datasheet(7/16 Pages) PHILIPS

7 / 16 page

1998 Nov 19

Philips Semiconductors

Product speciﬁcation

Low-voltage frequency synthesizer for

radio telephones

UMA1021AM

CHARACTERISTICS

All values refer to the typical test and application diagram of Fig.5; VDD1 =VDD2 = 2.7 to 5.5 V; VCC = 2.7 to 5.5 V;

Tamb =25 °C; unless otherwise speciﬁed. Characteristics for which only a typical value is given are not tested.

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Supplies; pins 3, 12 and 15

VDD1, VDD2

digital supply voltage

VDD1 =VDD2 =VDD

2.7

−

5.5

VCC

analog supply voltage for charge

pump

VCC ≥ VDD

2.7

−

5.5

IDD

total digital supply current of

synthesizer (IDD1 +IDD2)

VDD = 5.5 V

−

9.5

ICC

analog supply current of charge

pump

VCC = 5.5 V;

Rset = 5.6 kΩ

−

3.8

Itot(pd)

total supply current in

Power-down mode (IDD +ICC)

logic levels0VorVDD −

550

µA

RF main divider input; pin 5

fRF

RF input frequency

300

−

2200

MHz

VRF(rms)

input signal level (RMS value)

AC-coupled; series

resistance Rs =50 Ω

−

225

D/Dm

main divider ratio

512

−

131071

input impedance (real part)

fRF = 1 GHz

−

750

−Ω

fRF = 2 GHz

−

130

−Ω

input capacitance

fRF = 1 GHz

−

0.5

−

fRF = 2 GHz

−

1.5

−

Reference divider input; pin 13

fxtal

crystal reference oscillator input

frequency

−

MHz

Vxtal(rms)

sinusoidal input signal level

(RMS value)

−

500

D/Dref

reference divider ratio

2047

input impedance (real part)

fxtal =13MHz

−

Ω

input capacitance

fxtal =13MHz

−

1.3

−

Phase comparator

fph(comp)

phase comparator frequency

−

200

−

kHz

floop(max)

maximum loop comparison

frequency

−

2000

−

kHz

Charge pump current setting; pin 16

Rset

external resistor

connected between

pin 16 and ground

5.6

−

Ω

Vset

regulated voltage

Rset = 5.6 kΩ−

1.2

−

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