UMA1015AM NXP Semiconductors, UMA1015AM Datasheet - Page 2

• Manufacturer Part Number: UMA1015AM
• Description: Low-power Dual Frequency Synthesizer For Radio Communications
• Manufacturer: NXP Semiconductors

Philips Semiconductors
FEATURES
APPLICATIONS
QUICK REFERENCE DATA
1997 Sep 03
V
V
V
I
I
I
f
f
f
f
T
DD1
DDpd
DDpd
RF
XTALIN
pc(min)
pc(max)
amb
Two fully programmable RF dividers up to 1.1 GHz
Fully programmable reference divider up to 35 MHz
2 : 1 or 1 : 1 ratio of selectable reference frequencies
Fast three-line serial bus interface
Adjustable phase comparator gain
Programmable out-of-lock indication for both loops
On-chip voltage doubler
Low current consumption from 3 V supply
Separate power-down mode for each synthesizer
Up to 4 open-drain output ports
Crystal input frequency signal inverted and buffered
output on separate pin.
Cordless telephone
Hand-held mobile radio.
DD1
CC
CCvd
Low-power dual frequency synthesizer
for radio communications
SYMBOL
+ I
, V
+ I
DD2
DD2
CCpd
+ I
CC
digital supply voltage
charge pump supply voltage external supply; doubler
charge pump supply from
voltage doubler
operating supply current
total current in power-down
mode
current in power-down mode
from supply V
RF input frequency for each
synthesizer
crystal input frequency
minimum phase comparator
frequency
maximum phase
comparator frequency
operating ambient
temperature
PARAMETER
DD1
and V
DD2
V
disabled; V
doubler enabled
both synthesizers ON; doubler
disabled; V
doubler disabled;
V
doubler enabled;
V
DD1
DD1
DD1
= V
= V
= V
CONDITIONS
DD2
DD2
DD2
2
CC
DD1
GENERAL DESCRIPTION
The UMA1015AM is a low-power dual frequency
synthesizer for radio communications which operates in
the 50 to 1100 MHz frequency range. Each synthesizer
consists of a fully programmable main divider, a phase and
frequency detector and a charge pump. There is a fully
programmable reference divider common to both
synthesizers which operates up to 35 MHz.
The device is programmed via a 3-wire serial bus which
operates up to 10 MHz. The charge pump currents (gains)
are fixed by an external resistance at pin 20 (I
The BiCMOS device is designed to operate from 2.7 V
(3 NiCd cells) to 5.5 V at low current. Digital supplies V
and V
supply (V
on-chip voltage doubler. V
than V
Each synthesizer can be powered-down independently via
the serial bus to save current. It is also possible to
power-down the device via the HPD input (pin 5).
= 3 V
= 3 V
= V
V
DD2
DD
DD1
DD2
CC
must be at the same potential. The charge pump
.
= 3 V
) can be provided by an external source or
2.7
2.7
50
3
MIN.
30
CC
must be equal to or higher
2V
8.7
3
0.25
10
750
DD1
TYP.
UMA1015AM
Product specification
0.6 6.0
5.5
6.0
1100
35
+85
MAX. UNIT
SET
).
V
V
V
mA
mA
MHz
MHz
kHz
kHz
C
A
DD1