UMA1015AM Datasheet, PDF (2/24 Pages) NXP Semiconductors – Low-power dual frequency synthesizer for radio communications

Philips Semiconductors
Low-power dual frequency synthesizer
for radio communications
Product specification
UMA1015AM
FEATURES
• 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.
APPLICATIONS
• Cordless telephone
• Hand-held mobile radio.
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_SET).
The BiCMOS device is designed to operate from 2.7 V
(3 NiCd cells) to 5.5 V at low current. Digital supplies V_DD1
and V_DD2 must be at the same potential. The charge pump
supply (V_CC) can be provided by an external source or
on-chip voltage doubler. V_CC must be equal to or higher
than V_DD1.
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).
QUICK REFERENCE DATA
SYMBOL
V_DD1, V_DD2
V_CC
PARAMETER
digital supply voltage
charge pump supply voltage
V_CCvd
charge pump supply from
voltage doubler
I_DD1 + I_DD2 + I_CC operating supply current
I_DDpd + I_CCpd
I_DDpd
f_RF
f_XTALIN
f_pc(min)
f_pc(max)
T_amb
total current in power-down
mode
current in power-down mode
from supply V_DD1 and V_DD2
RF input frequency for each
synthesizer
crystal input frequency
minimum phase comparator
frequency
maximum phase
comparator frequency
operating ambient
temperature
CONDITIONS
V_DD1 = V_DD2
external supply; doubler
disabled; V_CC ≥ V_DD
doubler enabled
both synthesizers ON; doubler
disabled; V_DD1 = V_DD2 = 3 V
doubler disabled;
V_DD1 = V_DD2 = 3 V
doubler enabled;
V_DD1 = V_DD2 = 3 V
MIN.
2.7
2.7
−
−
−
−
50
3
−
−
−30
TYP.
−
−
MAX. UNIT
5.5 V
6.0 V
2V_DD1 − 0.6 6.0 V
8.7
−
mA
3
−
µA
0.25
−
mA
−
1100 MHz
−
35 MHz
10
−
kHz
750
−
kHz
−
+85 °C
1997 Sep 03
2