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參數(shù)資料
| 型號(hào)： | UMA1021M |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | XO, clock |
| 英文描述： | Low-voltage frequency synthesizer for radio telephones |
| 中文描述： | PLL FREQUENCY SYNTHESIZER, 2200 MHz, PDSO20 |
| 封裝： | 4.40 MM, PLASTIC, SOT-266-1, SSOP-20 |
| 文件頁數(shù)： | 2/16頁 |
| 文件大?。?/td> | 107K |
| 代理商： | UMA1021M |
1999 Jun 17
2
Philips Semiconductors
Product specification
Low-voltage frequency synthesizer
for radio telephones
UMA1021M
FEATURES
Low phase noise
Low current from 3 V supply
Fully programmable main divider
3-line serial interface bus
Independent fully programmable reference divider,
driven from external crystal oscillator
Dual charge pump outputs
Hard and soft power-down control.
APPLICATIONS
900 MHz and 2 GHz mobile telephones
Portable battery-powered radio equipment.
GENERAL DESCRIPTION
The UMA1021M BICMOS device integrates a prescaler,
programmable dividers, and a phase comparator to
implement a phase-locked loop.
The device is designed to operate from 3 NiCd cells, in
pocket phones, with low current and nominal 3 V supplies.
The synthesizer operates at RF input frequencies up to
2.2 GHz, with a fully programmable reference divider.
All divider ratios are supplied via a 3-wire serial
programming bus.
Separate power and ground pins are provided to the
analog (charge-pump) and digital circuits. The ground
leads should be externally short-circuited to prevent large
currents flowing across the die and thus causing damage.
V
DD1
and V
DD2
must also be at the same potential (V
DD
).
V
CC
must be equal to or greater than V
DD
(e.g. V
DD
= 3 V
and V
CC
= 5 V for wider VCO control voltage range).
The phase detector has two charge-pump outputs, CP and
CPF, the latter of which is enabled directly at pin FAST.
This permits the design of adaptive loops. The charge
pump currents (phase detector gain) are fixed by an
external resistance at pin I
SET
and via the serial interface.
Only a passive loop filter is necessary; the charge pumps
function within a wide voltage compliance range to
improve the overall system performance.
QUICK REFERENCE DATA
ORDERING INFORMATION
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
V
DD
digital supply voltage
V
DD1
= V
DD2
;
V
CC
≥
V
DD
V
CC
≥
V
DD
2.7
5.5
V
V
CC
I
DD
+ I
CC
I
CC(pd)
+ I
DD(pd)
f
RF
f
xtal
f
PC
T
amb
charge-pump supply voltage
supply current
total supply current in power-down mode
RF input frequency
crystal reference input frequency
phase comparator frequency
operating ambient temperature
2.7
300
3
30
10
5
200
5.5
2200
35
+85
V
mA
μ
A
MHz
MHz
kHz
°
C
TYPE
NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
UMA1021M
SSOP20
plastic shrink small outline package; 20 leads; body width 4.4 mm
SOT266-1
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UMA1021M/C2 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:IC-SM-FREQ SYNTHESIZER |
| UMA1022M | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Low cost dual frequency synthesizer for radio telephones |
| UMA10A | 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:ULTRAMITE SURFACE MOUNT 500 Watt Transient Voltage Suppressor 5.0 to 170 V |
| UMA10CA | 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:ULTRAMITE SURFACE MOUNT 500 Watt Transient Voltage Suppressor 5.0 to 170 V |
| UMA10N | 制造商:ROHM 制造商全稱:Rohm 功能描述:General purpose (dual digital transistors) |
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