...the analog plus company TM XR-2206--2ES November 996-4 XR-2206/22/222 Evaluation System User Manual Rev..00 996 EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 (50) 668-7000 FAX (50) 668-707
XR-2206--2ES NOTICE EXAR Corporation reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. EXAR Corporation assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement. Charts and schedules contained herein are only for illustration purposes and may vary depending upon a user s specific application. 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; (b) the user assumes all such risks; (c) potential liability of EXAR Corporation is adequately protected under the circumstances. Copyright 996 EXAR Corporation User Manual November 996 Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited. Rev..00 2
Table of Contents GENERAL DESCRIPTION............................................... 5 BOARD SCHEMATIC DIAGRAM......................................... 5 COMPONENT CONSIDERATIONS....................................... 5 Figure. Demo Board Component Layout....................... 6 Figure 2. XR-2206 Demo Board................................ 7 Figure 3. XR-22 Demo Board................................ 8 Figure 4. XR-222 Demo Board................................ 9 Rev..00 3
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...the analog plus company TM XR-2206--2ES XR-2206/22/222 Evaluation System GENERAL DESCRIPTION This demo board is a blank printed circuit card that simplifies design, breadboarding, and test of circuits using the XR-2206, XR-22, or the XR-222. The 5.0 by 4.75 inch board can be used to build practically all of the databook application circuits that are given for these devices. With the exception of common power feed, each chip and its associated passive components are independent circuit blocks on the demo board. Therefore, it can be assembled with any one or more of the chips according to the user s needs. BOARD SCHEMATIC DIAGRAM The schematic diagram contains separate sections for the XR-2206, XR-22, and the XR-222. Circuit design for a specific application requires using these diagrams while referring to the appropriate circuits and equations that are given for each device in the EXAR databook. A breadboard section with isolated power and ground busses is also provided for additional analog or digital circuitry that may be required. The purpose of this schematic is to show the circuit capabilities for each integrated circuit. Although the component values shown are reasonable and each of the three devices will function properly with them, they are provided for illustration only, and are not chosen for any specific application. Also, all the parts that are shown may not be required for a particular circuit since the schematic shows everything that the board can accommodate. COMPONENT CONSIDERATIONS The component marking, which is : scale, gives individuals who do not have an actual demo board an approximate idea of component sizes. Power, input, and output connections are made at pads that are located close to the associated IC pin or component. Holes for five banana jacks or binding posts are located at the rear of the board. Two of these should be used for power and ground, and the remaining three can be wired to the I/O pads as needed. The style of electrical components that the board uses should be readily available. The potentiometers are the inexpensive vertical-mount PC board type. Resistors are /4 watt and the bypass capacitors can be 0.µF monolithic ceramic type with radial leads spaced 0. inch. The electrolytic capacitors are also vertical mount units with 0. inch lead spacing. The board area provided for the various timing capacitors should be sufficient for small mica, polystyrene, or mylar units. Rev..00 5
XR-2206--2ES SINE R5 C5 R R22 C3 R9 AM INP C4 R2 E R3 R6 U XR 2206 R4 FSK C3 R8 C SQ INP R7 R0 Lock DET SIG INP R7 R6 Data C7 R5 GND R8 C6 R4 U2 XR 22 C2 R9 C R C0 C9 C2 R2 R3 C8 VCO I C9 Demod R33 SIG INP C20 U3 XR 222 R2 C7 E2 C6 R20 VCO Volt VCO Quad R26 C4 C5 R25 R24 XR-2206--2 Demo Board Breadboard Area Figure. Demo Board Component Layout Rev..00 6
XR-2206--2ES BJ Ground BJ2 C3 C2 0µF 0.µF 4 U AM INP 5 6 R9 E C4 6 VCO Mult. & Sine Shaper 5 4 R8 FSK INP R3 R6 R4 R7 9 7 8 Current Switches C µf 0 2 3 R22 22K XR-2206 3 2 C5 0.µF R0 0K SINE OUT SQ OUT R5 50K R 5.K C3 0µF R2 5.K EXAR CORPORATION 48720 Kato Road Fremont, CA 94538 Title: Demo Board for 2206--2 Size: Document Number: Rev: A DB2206.SCH.0 Date: October 2, 994 Sheet 3 of 3 Figure 2. XR-2206 Demo Board Rev..00 7
XR-2206--2ES BJ Ground BJ2 C6 0.µF C2 0µF U2 SIG INP R3 R9 R2 C8 2 0.µF 4 C C9 0.µF R 3 2 0 8 Pre Amp VCO Internal Reference Loop 0 Det Quad 0 Det FSK Comp 4 Lock Detect Comp XR-22 R4 3 5 6 7 R8 C7 0.µF R7 0K R6 0K R5 0K LOCK DETECT OUTPUTS DATA OUT C2 0nF C0 4.7nF EXAR CORPORATION 48720 Kato Road Fremont, CA 94538 Title: Demo Board for 2206--2 Size: Document Number: Rev: A DB22.SCH.0 Date: October 2, 994 Sheet of 3 Figure 3. XR-22 Demo Board Rev..00 8
XR-2206--2ES BJ Ground BJ2 SIG INP C8 2 0.µF 4 C20 0.µF Pre Amp C2 0µF U3 Phase Detector 6 0 E2 R24 R26 C5 3 2 9 7 VCO Amp VCO Current VCO Quad Op Amp - 5 3 5 8 C9 VCO VOLT OUT VCO I OUT VCO QUAD OUTPUT DEMOD OUT R20 Internal Reference 6 XR-222 R2 4 R23 C4 nf R26 C7 0.µF C6 4.7nF EXAR CORPORATION 48720 Kato Road Fremont, CA 94538 Title: Demo Board for 2206--2 Size: A Document Number: DB222.SCH Rev:.0 Date: October 2, 994 Sheet 2 of 3 Figure 4. XR-222 Demo Board Rev..00 9
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Rev..00 996...the analog plus company TM EXAR Corporation 48720 Kato Road Fremont, CA 94538 (50) 668-7000, Fax (50) 668-707 Worldwide Web Site: http://www.exar.com