|
|
PDF XR-2212CP Data sheet ( Hoja de datos )
| Número de pieza | XR-2212CP | |
| Descripción | Precision Phase-Locked Loop | |
| Fabricantes | Exar Corporation | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de XR-2212CP (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
|
No Preview Available !
...the analog plus companyTM
XR-2212
Precision
Phase-Locked Loop
FEATURES
D Quadrature VCO Outputs
D Wide Frequency Range (0.01Hz to 300kHz)
D Wide Supply Voltage Range (4.5V to 20V)
D TTL/HCMOS Compatible (VCC = 5VDC)
D Wide Dynamic Range (2mV to 3Vrms)
D Adjustable Tracking Range ("1% to "80%)
D Excellent Temp. Stability 20ppm/°C, Typ.
APPLICATIONS
D Frequency Synthesis
D Data Synchronization
D FM Detection
D Tracking Filters
D FSK Demodulation
June 1997-3
GENERAL DESCRIPTION
The XR-2212 is an ultra-stable monolithic phase-locked
loop (PLL) system especially designed for data
communications and control system applications. Its on
board reference and uncommitted operational amplifier,
together with a typical temperature stability of better than
20ppm/°C, make it ideally suited for frequency synthesis,
FM detection, and tracking filter applications. The wide
input dynamic range, large operating voltage range, large
frequency range, and HCMOS and TTL compatibility
contribute to the usefulness and wide applicability of this
device.
ORDERING INFORMATION
Part No.
XR-2212M
XR-2212CP
XR-2212P
Package
16 Lead 300 Mil CDIP
16 Lead 300 Mil PDIP
16 Lead 300 Mil PDIP
Operating
Temperature Range
-55°C to +125°C
0°C to +70°C
-40°C to +85°C
BLOCK DIAGRAM
INP 2
0-DET I 16
TIM C1 14
TIM C2 13
TIM R 12
PINP 9
NINP 7
Pre Amplifier
Phase
Detector
VCC
1
VCO
VREF
Amp
GND
4
10 0-DET O
15 VCOQO
3 VCOOC
5 VCOOV
11 VREF
Op Amp
Figure 1. XR-2212 Block Diagram
8 OUT
6 COMP
Rev. 2.01
E1979
EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 z (510) 668-7000 z FAX (510) 668-7017
1
1 page  
XR-2212
Signal
Input
0-DET
Input
VCO
Voltage
Output
VCO
Current
Output
Pre
Amp
Phase
Detector
AMP
Loop
Filter
VCO
+
-
Op Amp
Phase
Quadrature
Output
Figure 2. Functional Block Diagram of XR-2212 Precision PLL System
2
0.1mF
Input
Signal
0.1mF
%N
External
Divider
(Optional)
Phase
Detector
16
10
C1
9
7
ÁÁÁÁRF
RC
R3 11
0.1mF
R1
5 12
VCO
14 13
R0
CO
VCC
6 RL
5.6K
8 CO
Demod
Output
Internal
Reference
Rev. 2.01
Figure 3. Generalized Circuit Connection for FM Detection, Signal
Tracking or Frequency Synthesis
5
5 Page 
2
FM
Input
0.1mF
4
XR-2212
VCC
1 VCC
Phase
10
Detector
C1
16
9
7
RF
RC
11
0.1mF
R1
5 12
VCO
14 13
CO
R0
Rx Fine Tune
6
30pF
RL
5K
0.1mF
8
Demod
Output
Internal
Reference
Figure 11. Circuit Connection for FM Demodulation
Design Instructions
The circuit of Figure 11 can be tailored to any FM
demodulation application by a choice of the external
components R0, R1, RC, RF, C0 and C1. For a given FM
center frequency and frequency deviation, the choice of
these components can be calculated as follows, using the
design equations and definitions given on page 10.
a) Choose VCO center frequency f0 to be the same as
FM carrier frequency.
b) Choose value of timing resistor R0, to be in the range
of 10kW to 100kW. This choice is arbitrary. The
recommended value is R0 + 20kW. The final value
of R0 is normally fine-tuned with the series
potentiometer, RX.
c) Calculate value of C0 from design equation (1) or from
Figure 7:
C0 = 1/R0f0
d) Choose R1 to determine the tracking bandwidth, Df
(see design equation 5). The tracking bandwidth, Df,
should be set significantly wider than the maximum
input FM signal deviation, DfSM. Assuming the
tracking bandwidth to be “N” times larger than
DfSM, one can re-unite design equation 5 as:
Df
f0
+
R0
R1
+
N
DfSM
f0
Table 2. lists recommended values of N, for various
values of the maximum deviation of the input FM
signal.
e) Calculate C1 to set loop damping (see design
equation 4). Normally, ς = 1/2 is recommended.
Then, C1 = C0/4 for ς = 1/2.
Rev. 2.01
11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet XR-2212CP.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| XR-2212CP | Precision Phase-Locked Loop | Exar Corporation |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |