XR2212

Manufacturer Part NumberXR2212
DescriptionPrecision Phase-Locked Loop
ManufacturerExar Corporation
XR2212 datasheet
 
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...the analog plus company
FEATURES
Quadrature VCO Outputs
Wide Frequency Range (0.01Hz to 300kHz)
Wide Supply Voltage Range (4.5V to 20V)
TTL/HCMOS Compatible (V
= 5VDC)
CC
Wide Dynamic Range (2mV to 3Vrms)
Adjustable Tracking Range ( 1% to
Excellent Temp. Stability 20ppm/ C, Typ.
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,
ORDERING INFORMATION
Part No.
XR-2212M
XR-2212CP
XR-2212P
BLOCK DIAGRAM
2
INP
16
0-DET I
14
TIM C1
13
TIM C2
12
TIM R
PINP
9
7
NINP
Rev. 2.01
1979
EXAR Corporation, 48720 Kato Road, Fremont, CA 94538
TM
APPLICATIONS
Frequency Synthesis
Data Synchronization
FM Detection
Tracking Filters
FSK Demodulation
80%)
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.
Package
16 Lead 300 Mil CDIP
16 Lead 300 Mil PDIP
16 Lead 300 Mil PDIP
V
CC
1
Pre Amplifier
Phase
Detector
VCO
Amp
V
REF
Op Amp
Figure 1. XR-2212 Block Diagram
(510) 668-7000
1
XR-2212
Precision
Phase-Locked Loop
June 1997-3
Operating
Temperature Range
-55 C to +125 C
0 C to +70 C
-40 C to +85 C
GND
4
10 0-DET O
15 VCOQO
VCOOC
3
5
VCOOV
11
V
REF
8
OUT
6
COMP
FAX (510) 668-7017

XR2212 Summary of contents

  • Page 1

    ... TIM C2 12 TIM R PINP 9 7 NINP Rev. 2.01 1979 EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 TM APPLICATIONS Frequency Synthesis Data Synchronization FM Detection Tracking Filters FSK Demodulation 80%) FM detection, and tracking filter applications. The wide input dynamic range, large operating voltage range, large ...

  • Page 2

    XR-2212 PIN CONFIGURATION PIN DESCRIPTION Pin # Symbol Type Description 1 V Positive Power Supply INP I Receive Analog Input. 3 VCOOC O VCO Current Output. 4 GND Ground Pin. 5 VCOOV O VCO Voltage Source Output. 6 ...

  • Page 3

    ELECTRICAL CHARACTERISTICS Test Conditions +12V Figure 3 for component designation. XR-2212M/2212P Parameter P t Min. General Characteristics Supply Voltage 4.5 Supply Current Oscillator Section Frequency Accuracy Frequency Stability 1 Temperature ...

  • Page 4

    XR-2212 ELECTRICAL CHARACTERISTICS XR-2212M/2212P Parameter Parameter Min. Input Preamp Section Input Impedance Input Signal to Cause Limiting Op Amp Section Voltage Gain 55 Input Bias Current Offset Voltage Slew Rate Internal Reference Voltage Level 4.9 Output Impedance Maximum Source Current ...

  • Page 5

    Pre Amp Signal Input 0-DET Input AMP VCO Voltage Output VCO Current Output Figure 2. Functional Block Diagram of XR-2212 Precision PLL System 2 Phase Detector 0.1 F Input Signal 16 0 External Divider (Optional) Figure 3. ...

  • Page 6

    XR-2212 Phase Detector Input 16 Signal Input 2 30K 30K Input Preamplifier 2K 2K Timing Capacitor Timing 12 Resistor Figure 4. Simplified Circuit Schematic of XR-2212 Rev. 2.01 Loop Phase Detector Output ...

  • Page 7

    TYPICAL CHARACTERISTICS 10K > 100K Supply Voltage V (V) CC Figure 5. Typical Supply Current ...

  • Page 8

    XR-2212 +1 -0.5 -1.0 -50 Figure 9. Typical Center Frequency Drift vs. Temperature DESCRIPTION OF CIRCUIT CONTROLS Signal Input (Pin 2): Signal is AC coupled to this terminal. The internal impedance at Pin 2 ...

  • Page 9

    Pin 12 must be limited to <3 mA for proper operation of the circuit. VCO Timing Capacitor (Pins 13 and 14): VCO frequency is inversely proportional to the external timing capacitor connected across these terminals ...

  • Page 10

    XR-2212 Design Equations (See Figure 3 and Figure 10 for definition of components.) 1. VCO Center Frequency 1 Internal Reference Voltage, V REF Pin 11 650mV REF CC ...

  • Page 11

    Phase Detector 0 Input 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 R ...

  • Page 12

    XR-2212 % Deviation of FM Recommended Value of Signal ( Bandwidth Ratio less 10% 10% to 30% 30% to 50% Table 2. ...

  • Page 13

    Choose timing resistor the range of 15k 0 to 100k . This choice is arbitrary. R tuned with a series potentiometer, ...

  • Page 14

    XR-2212 INPUT SENSITIVITY The input to the XR-2212 may sometimes be too sensitive to noise conditions on the input line. Figure 13 illustrates a method of de-sensitizing the XR-2212 from such noisy line conditions by the use of a resistor, ...

  • Page 15

    LEAD CERAMIC DUAL-IN-LINE Base 1 Plane Seating L Plane B SYMBOL Note: The control dimension is the inch column Rev. 2.01 (300 MIL ...

  • Page 16

    XR-2212 16 LEAD PLASTIC DUAL-IN-LINE 16 A Seating Plane L B SYMBOL Note: The control dimension is the inch column Rev. ...

  • Page 17

    Rev. 2.01 Notes 17 XR-2212 ...

  • Page 18

    XR-2212 Rev. 2.01 Notes 18 ...

  • Page 19

    Rev. 2.01 Notes 19 XR-2212 ...

  • Page 20

    ... While the information in this publication has been carefully checked; no responsibility, however, is assumed for inaccuracies. EXAR Corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless EXAR Corporation receives, in writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized ...