uaa2062 NXP Semiconductors, uaa2062 Datasheet - Page 6

• Manufacturer Part Number: uaa2062
• Description: Analog Cordless Telephone Ic
• Manufacturer: NXP Semiconductors

Philips Semiconductors
FUNCTIONAL DESCRIPTION
Power supply and power management
P
The UAA2062 is used in a cordless telephone handset and
in a base unit. The handset unit is battery powered and can
operate on three NiCad cells. The minimum supply voltage
(V
oscillator, clock divider and internal voltage regulator will
function with a supply voltage of 2.85 V.
P
When the UAA2062 is used in a handset, it is important to
reduce the current consumption. There are 3 power saving
modes in addition to the active mode:
Table 1 Power saving operation modes
Note
1. In the standby mode and in the inactive mode, by default, V
M
Table 2 shows the typical and the maximum current consumption in the active mode and the three current saving modes
under the following conditions: IP3 HIGH mode (bit IP3 is logic 1), see Table 6; LNA gain is step 3 (bits LNA are logic 11),
see Table 12 and the PA output level is step 3 (bits PA are logic 11), see Table 15.
In the standby mode and in the inactive mode, pin V
output signal is disabled (bits clock divider ratio are logic 00).
2000 Aug 10
Microcontroller interface
V
Crystal oscillator
RF receiver and RX PLL
VB reference
Carrier and low-battery detectors
Data comparator
TX PLL and PA
RX and TX audio paths
OWER SUPPLY VOLTAGE
OWER SAVING OPERATION MODES
AXIMUM CURRENT CONSUMPTION
CC
ref(PLL)
Analog cordless telephone IC
(bit V
) is 3.0 V. However the low-battery detector, crystal
REFPLL
disable is logic 0). If bit V
CIRCUIT BLOCK
REFPLL
disable is logic 1, V
ref(PLL)
ACTIVE
MODE
X
X
X
X
X
X
X
X
X
6
is not powered (bit V
1. In the active mode all blocks are powered.
2. In the RX mode, all circuitry in the receiver part is
3. In the standby mode, all circuitry is powered down
4. In the inactive mode, all circuitry is powered down
Latch memory is maintained in all modes. Table 1 shows
which blocks are powered in each mode.
ref(PLL)
powered.
except the crystal oscillator, the microcontroller
interface and the V
except the microcontroller interface and the V
block.
ref(PLL)
remains regulated but is not calibrated
RX MODE
is not regulated and fluctuates with V
X
X
X
X
X
X
X
REFPLL
ref(PLL)
disable is logic 1) and the clock
STANDBY
MODE
block.
X
X
X
(1)
Product specification
UAA2062
INACTIVE
MODE
X
X
(1)
ref(PLL)
CC
.