UMA1022M NXP Semiconductors, UMA1022M Datasheet - Page 2

• Manufacturer Part Number: UMA1022M
• Description: Low Cost Dual Frequency Synthesizer For Radio Telephones
• Manufacturer: NXP Semiconductors

Philips Semiconductors
FEATURES
APPLICATIONS
GENERAL DESCRIPTION
The UMA1022M BICMOS device integrates prescalers,
programmable dividers, a crystal oscillator/buffer and
phase comparators to implement two phase-locked loops.
The device is designed to operate from 3 NiCd or a single
LiIon cell in pocket phones, or from an external 3 V supply.
QUICK REFERENCE DATA
1998 Dec 09
V
V
V
I
I
f
f
f
f
T
tot
tot(pd)
RF
IF
xtal
PCmax
SYMBOL
amb
Low phase noise
Low current from 3 V supply
Fully programmable dividers
3-line serial interface bus
Input reference buffer configurable as an oscillator with
external crystal resonator
Wide compliance voltage charge pump outputs
Two power-down input control pins.
900 MHz and 2 GHz digital radio telephones
Portable battery-powered radio equipment.
DD
CCA
DDX
Low cost dual frequency synthesizer for
radio telephones
, V
CCB
digital supply voltage
analog supply voltages
crystal reference supply voltage
all supply currents
(I
mode
total supply currents in power-down
mode
RF input frequency
IF input frequency
crystal reference oscillator frequency
maximum loop comparison frequency
operating ambient temperature
DD
+ I
CCA
+ I
PARAMETER
CCB
+ I
DDX
) in active
V
V
V
E = 1; V
V
V
CCA
CCA
DDX
DDX
CCA
XON = 0
XON = 1
2
The synthesizers operate at RF input frequencies up to
2.1 GHz and 550 MHz. All divider ratios are supplied via a
3-wire serial programming bus. The reference divider uses
a common, fully programmable part and a separate
subdivider section. In this way the comparison frequencies
are related to each other allowing optimum isolation
between charge pump pulses.
Separate power and ground pins are provided to the
analog (charge pump, prescaler) and digital (CMOS)
circuits. An independent supply for the crystal oscillator
section allows maximum frequency stability. The ground
leads should be externally short-circuited to prevent large
currents flowing across the die and thus causing damage.
V
V
than V
control voltage range).
The charge pump currents (phase detector gain) are fixed
by internal resistances and controlled by the serial
interface. Only passive loop filters are necessary;
the charge pumps function within a wide voltage
compliance range to improve the overall system
performance.
Suitable pin layout is chosen to minimize coupling and
interference between signals entering or leaving the chip.
= V
= V
= V
= V
= V
DD
CCB
CONDITIONS
CCA
CCB
CCB
DD
DD
CCB
and V
must be equal to each other and equal to or greater
DD
= 3.0 V
= V
(e.g. V
V
V
4.0 V
CCB
DDX
DD
DD
= 3.0 V;
must be at the same potential. V
DD
= 3 V and V
2.7
2.7
2.7
300
50
50
3
MIN.
30
CCA
3.0
3.0
3.0
14.65
15.9
40
2000
TYP.
Product specification
= 5.5 V for wider VCO
UMA1022M
5.5
5.5
5.5
2100
550
400
20
+85
MAX.
CCA
V
V
V
mA
mA
MHz
MHz
MHz
MHz
kHz
UNIT
C
and
A