參數(shù)資料
型號: S1M8836X01-G0T0
元件分類: PLL合成/DDS/VCOs
英文描述: PLL FREQUENCY SYNTHESIZER, 1000 MHz, CQCC24
封裝: 3.50 X 4.50 MM, QFN-24
文件頁數(shù): 25/29頁
文件大?。?/td> 234K
代理商: S1M8836X01-G0T0
FRACTIONAL-N RF/INTEGER-N IF DUAL PLL
S1M8836/37
5
PIN DESCRIPTION
Pin No.
Symbol
I/O
Descriptions
1
V
DDRF
RF PLL power supply (2.7V to 4.0V). Must be equal to V
DDIF.
2
VpRF
Power supply for RF charge pump. Must be
≥ V
DDRF and VDDIF.
3
CPoRF
O
RF charge pump output. Connected to an external loop filter.
4
DGND
Ground for RF PLL digital circuitry.
5
finRF
I
RF prescaler input. Small signal input from the external VCO.
6
finRF
I
RF prescaler complementary input. For a single-ended output RF VCO, a bypass
capacitor should be placed as close as possible to this pin and be connected
directly to the ground plane.
7
GNDRF
Ground for RF PLL analog circuitry.
8
V
DDRFa
PLL power supply (2.7V to 4.0V) for RF analog (prescaler). Must be equal to V
DDRF
9
OSCin
I
Oscillator input to drive both the IF and RF R counter inputs.
10
foLD
O
Multiplexed output of N or R divider and RF/IF lock detect.
11
RF_EN
I
RF PLL Enable (Enable when HIGH, Power down when LOW). Controls the RF PLL
to power down directly, not depending on a program control. Also sets the charge
pump output to be in TRI-STATE when LOW. Powers up when HIGH depends on
the state of RF_CTL_WORD.
12
IF_EN
I
IF PLL Enable (Enable when HIGH, Power-down when LOW). Controls the IF PLL
to power down directly. The same as RF_EN except that power-up depends on the
state of IF_CTL_WORD.
13
CLOCK
I
CMOS clock input. Data for the various counters is clocked into the 22-bit shift
register on the rising edge.
14
DATA
I
Binary serial data input. Data entered MSB (Most Significant Bit) first.
15
LE
I
Load enable when LE goes HIGH. High impedance CMOS input.
16
GNDIF
Ground for IF analog circuitry.
17
finIF
I
IF prescaler complementary input. For a single-ended output IF VCO, a bypass
capacitor should be placed as close as possible to this pin.
18
finIF
I
IF prescaler input. Small signal input from the VCO.
19
DGND
Ground for IF PLL digital circuitry.
20
CPoIF
O
IF charge pump output. Connected to an external loop filter.
21
VpIF
Power supply for IF charge pump. Must be
≥ V
DDRF and VDDIF.
22
V
DDIF
IF PLL power supply (2.7V to 4.0V). Must be equal to V
DDRF.
23
OUT1
O
Programmable CMOS output. Level of the output is controlled by W2[19] bit.
24
OUT0
O
Programmable CMOS output. Level of the output is controlled by W2[18] bit.
In the Speedy Lock mode, the OUT0 and OUT1 pins can be utilized as synchronous
switches between active low and tri-state.
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