UMA1015M 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
UMA1015M
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.
APPLICATIONS
• Cordless telephone
• Hand-held mobile radio.
GENERAL DESCRIPTION
The UMA1015M 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 2.6 V (3 Ni-Cd 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
V_CCvd
I_DDO1 +I_DDO2 +
I_CCO
I_DD1pd + I_DD2pd
+ I_CCpd
I_DD1pd
f_RFA, f_RFB
f_XTALIN
f_pc(min)
f_pc(max)
T_amb
PARAMETER
digital supply voltage
charge pump supply
voltage
charge pump supply from
voltage doubler
operating supply current
current in power-down
mode per supply
current in power-down
mode from supply V_DD
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
MIN.
TYP.
2.6 −
2.6 −
MAX. UNIT
5.5 V
6.0 V
−
2V_DD1 − 0.6 6.0
V
both synthesizers ON; doubler −
disabled; V_DD1 = V_DD2 = 5.5 V
doubler disabled;
−
V_DD1 = V_DD2 = 5.5 V
doubler enabled;
−
V_DD1 = V_DD2 = 3 V
50
9.6
0.01
0.15
−
−
mA
−
mA
−
mA
1100 MHz
f_RF = 50 to 1100 MHz;
f_XTALIN = 3 to 35 MHz
f_RF = 50 to 1100 MHz;
f_XTALIN = 3 to 35 MHz
synthesizer A
2.6 V ≤ V_DD ≤ 5.5 V
synthesizer B
2.6 V ≤ V_DD ≤ 4.5 V
synthesizer B
2.6 V ≤ V_DD ≤ 5.0 V
3
−
−
10
−
750
−30 −
−30 −
0
−
35
MHz
−
kHz
−
kHz
+85 °C
+85 °C
+85 °C
1995 Jun 22
2