Wideband/Video T Switches

Transcription

1 Wideband/Video T Switches G540, G54, G542 ESCRIPTION The G540, G54, G542 are high performance monolithic wideband/video switches designed for switching RF, video and digital signals. By utilizing a "T" switch configuration on each channel, these devices achieve exceptionally low crosstalk and high off-isolation. The crosstalk and off-isolation of the G540 are further improved by the introduction of extra pins between signal pins. To achieve TTL compatibility, low channel capacitances and fast switching times, the G540 family is built on the Vishay Siliconix proprietary /CMOS process. Each switch conducts equally well in both directions when on. FEATURES Halogen-free according to IEC efinition Wide Bandwidth: 500 MHZ Low Crosstalk: - 85 db High Off-Isolation: - 80 db at 5 MHz "T" Switch Configuration TTL and CMOS Logic Compatible Fast Switching - t ON : 45 ns Low R S(on) : 30 Compliant to RoHS irective 02/95/EC BENEFITS Flat Frequency Response High Color Fidelity Low Insertion Loss Improved System Performance Reduced Board Space Reduced Power Consumption Improved ata Throughput APPLICATIONS RF and Video Switching RGB Switching Local and Wide Area Networks Video Routing Fast ata Acquisition ATE Radar/FLR Systems Video Multiplexing FUNCTIONAL BLOCK IAGRAM AN PIN CONFIGURATION G540 ual-in-line IN IN G540 PLCC IN IN S S 2 S S S S S S 3 4 IN IN IN4 IN3 3 Top View Top View S-429 Rev. H, 8-Jul- TRUTH TABLE Logic Switch 0 OFF ON Logic V Logic 2 V THE PROUCTS ESCRIBE HEREIN AN THIS OCUMENT ARE SUBJECT TO SPECIFIC ISCLAIMERS, SET FORTH AT /doc?9000

2 G540, G54, G542 FUNCTIONAL BLOCK IAGRAM AN PIN CONFIGURATION G54 ual-in-line and SOIC G542 ual-in-line and SOIC IN 6 IN S 3 4 S S 4 6 S IN IN 3 Top View IN 6 IN S 4 3 S S 4 6 S Top View TRUTH TABLE - G54 Logic "0" 0.8 V Logic "" 2 V Logic Switch 0 OFF ON TRUTH TABLE - G542 Logic SW, SW 2 SW 3, SW 4 0 OFF ON ON OFF Logic "0" 0.8 V Logic "" 2 V ORERING INFORMATION Temp Range Package Part Number G to 85 C -Pin Plastic IP G540J-E3 -Pin PLCC G540N-E3-55 to 25 C -Pin Sidebraze G540AP G540AP/883 G54-40 to 85 C 6-Pin Plastic IP G54J-E3 6-Pin Narrow SOIC G54Y-T-E3-55 to 25 C 6-Pin Sidebraze G54AP G54AP/883, MEA G to 85 C 6-Pin Plastic IP G542J-E3 6-Pin Narrow SOIC G542Y-T-E3-55 to 25 C 6-Pin Sidebraze G542AP G542AP/883, MEA 2 S-429 Rev. H, 8-Jul- THE PROUCTS ESCRIBE HEREIN AN THIS OCUMENT ARE SUBJECT TO SPECIFIC ISCLAIMERS, SET FORTH AT /doc?9000

3 G540, G54, G542 ABSOLUTE MAXIMUM RATINGS (T A = 25 C, unless otherwise noted) Parameter Symbol Limit Unit to to 2 to to 2 to - 9 to igital Inputs () to () or ma, whichever occurs first () to () + 4 V S, V or ma, whichever occurs first Continuous Current (Any Terminal) Current, S or (Pulsed at ms, 0 % duty cycle max) 40 Storage Temperature (AP Suffix) - 65 to 50 (J, N, Y Suffixes) - 65 to 25 6-Pin Plastic IP b 470 -Pin Plastic IP c 800 Power issipation (Package) a 6-Pin Narrow Body SOIC d 640 -Pin PLCC d , -Pin Sidebraze IP e 900 Notes: a. All leads welded or soldered to PC Board. b. erate 6.5 mw/ C above 25 C. c. erate 7 mw/ C above 25 C. d. erate 0 mw/ C above 75 C. e. erate 2 mw/ C above 75 C. V ma C mw SCHEMATIC IAGRAM (typical channel) V REF S IN - + Figure. S-429 Rev. H, 8-Jul- 3 THE PROUCTS ESCRIBE HEREIN AN THIS OCUMENT ARE SUBJECT TO SPECIFIC ISCLAIMERS, SET FORTH AT /doc?9000

4 G540, G54, G542 SPECIFICATIONS a Test Conditions Unless Specified = 5 V, = - 3 V A Suffix - 55 C to 25 C Suffixes - 40 C to 85 C Parameter Symbol V INH = 2 V, V INL = 0.8 V f Temp. b Typ. c Min. d Max. d Min. d Max. d Unit Analog Switch Analog Signal Range V ANALOG = - 5 V, = V rain-source R On-Resistance S(on) 30 I S = - 0 ma, V = 0 V R S(on) Match R S(on) Source Off Leakage Current I S(off) V S = 0 V, V = 0 V rain Off Leakage Current I (off) V S = 0 V, V = 0 V na Channel On Leakage Current I (on) V S = V = 0 V igital Control Input Voltage High V INH 2 2 Input Voltage Low V INL V Input Current I IN V IN = or Notes: a. Refer to PROCESS OPTION FLOWCHART. b. = 25 C, full = as determined by the operating temperature suffix. c. Typical values are for ESIGN AI ONLY, not guaranteed nor subject to production testing. d. The algebraic convention whereby the most negative value is a minimum and the most positive a maximum, is used in this data sheet. e. Guaranteed by design, not subject to production test. f. V IN = input voltage to perform proper function. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability ynamic Characteristics On State Input Capacitance e C S(on) V S = V = 0 V 4 Off State Input Capacitance e C S(off) V S = 0 V pf Off State Output Capacitance e C (off) V = 0 V Bandwidth BW R L = 50, See Figure MHz G540 G54 Turn-On Time t ON R L = k G542 C L = 35 pf 50 % to 90 % G540 Turn-Off Time t OFF See Figure 2 G54 G542 Charge Injection Q C L = 000 pf, V S = 0 V See Figure 3-25 pc R IN = 75 R L = 75 G Off Isolation OIRR f = 5 MHz G54-60 See Figure 4 G db R All Hostile Crosstalk X IN = 0, R L = 75 TALK(AH) f = 5 MHz, See Figure 6-85 Power Supplies Positive Supply Current I Negative Supply Current I- All Channels On or Off µa ns ma 4 S-429 Rev. H, 8-Jul- THE PROUCTS ESCRIBE HEREIN AN THIS OCUMENT ARE SUBJECT TO SPECIFIC ISCLAIMERS, SET FORTH AT /doc?9000

5 G540, G54, G542 TYPICAL CHARACTERISTICS (T A = 25 C, unless otherwise noted) I (ma) I- I Temperature ( C) Supply Curent vs. Temperature I+ Leakage I S(off), I (off) 00 na 0 na na 00 pa 0 pa pa 0. pa Temperature ( C) I (off), I S(off) vs. Temperature r S(on) rain-source On-Resistance (Ω) = 5 V = - 3 V 25 C V rain Voltage (V) 25 C - 55 C RS(on) rain-source On-Resistance (Ω) = 0 V = 2 V = 5 V Negative Supply (V) Positive Supply (V) = - V = - 5 V = - 3 V R S(on) vs. rain Voltage Constant Constant R L = C (pf) ISO (db) G542 G54 G V rain Voltage (V) On Capacitance f Frequency (MHz) Off Isolation S-429 Rev. H, 8-Jul- 5 THE PROUCTS ESCRIBE HEREIN AN THIS OCUMENT ARE SUBJECT TO SPECIFIC ISCLAIMERS, SET FORTH AT /doc?9000

6 G540, G54, G542 TYPICAL CHARACTERISTICS (T A = 25 C, unless otherwise noted) OIRR (db) k k R L = 80 Ω X TALK (db) G540 G542 G f - Frequency (MHz) Off Isolation vs. Frequency and Load Resistance (G540) f Frequency (MHz) All Hostile Crosstalk Q (pc) Time (ns) t ON - C L = 000 pf t OFF V S Source Voltage (V) Charge Injection vs. V S Temperature ( C) Switching Times vs. Temperature (G540/54) t ON 8 Time (ns) t BBM t OFF Positive Supply (V) Operating V oltage Area Temperature ( C) Switching and Break-Before-Make Time vs. Temperature (G542) Negative Supply (V) Operating Supply Voltage Range 6 S-429 Rev. H, 8-Jul- THE PROUCTS ESCRIBE HEREIN AN THIS OCUMENT ARE SUBJECT TO SPECIFIC ISCLAIMERS, SET FORTH AT /doc?9000

7 G540, G54, G542 TEST CIRCUITS + 5 V 3 V S V O Logic Input 3 V 50 % t r < ns t f < ns IN - 3 V R L kω C L 35 pf Switch Input Switch Output V S 0 t ON 90 % t OFF C L (includes fixture and stray capacitance) V O = V S R L R L + r S(on) Figure 2. Switching Time + 5 V ΔV O R g S V O V O V g 3 V IN C L 000 pf IN X ON OFF ON - 3 V Figure 3. Charge Injection ΔV O = measured voltage error due to charge injection The charge injection in coulombs is ΔQ = C L x V O C + 5 V V S S V O C + 5 V R g = 0 V, 2.4 V IN C R L V S R g = 50 Ω 0 V, 2.4 V S IN V O R L 50 Ω - 3 V C V S Off Isolation = log V O C = RF Bypass Figure 4. Off Isolation - 3 V Figure 5. Bandwidth S-429 Rev. H, 8-Jul- 7 THE PROUCTS ESCRIBE HEREIN AN THIS OCUMENT ARE SUBJECT TO SPECIFIC ISCLAIMERS, SET FORTH AT /doc?9000

8 G540, G54, G542 TEST CIRCUITS + 5 V C S V O 0 Ω 2.4 V IN X R L S 2 2 S 3 3 R L S 4 4 R L R L - 5 V C X TA LK(AH) = log 0 V OUT V IN Figure 6. All Hostile Crosstalk APPLICATIONS evice escription The G540, G54, G542 family of wideband switches offers true bidirectional switching of high frequency analog or digital signals with minimum signal crosstalk, low insertion loss, and negligible non-linearity distortion and group delay. Built on the Siliconix /CMOS process, these "T" switches provide excellent off-isolation with a bandwidth of around 500 MHz (350 MHz for G54). Silicon-gate /CMOS processing also yields fast switching speeds. An on-chip regulator circuit maintains TTL input compatibility over the whole operating supply voltage range, easing control logic interfacing. Circuit layout is facilitated by the interchangeability of source and drain terminals. Frequency Response A single switch on-channel exhibits both resistance (R S(on) ) and capacitance (C S(on) ). This RC combination has an attenuation effect on the analog signal which is frequency dependent (like an RC low-pass filter). The - 3-dB bandwidth of the G540 is typically 500 MHz (into 50 ). This measured figure of 500 MHz illustrates that the switch channel can not be represented by a two stage RC combination. The on capacitance of the channel is distributed along the onresistance, and hence becomes a more complex multi stage network of R s and C s making up the total R S(on) and C S(on). See Application Note AN502 for more details. Off-Isolation and Crosstalk Off-isolation and crosstalk are affected by the load resistance and parasitic inter-electrode capacitances. Higher off-isolation is achieved with lower values of R L. However, low values of R L increase insertion loss requiring gain adjustments down the line. Stray capacitances, even a fraction of pf, can cause a large crosstalk increase. Good layout and ground shielding techniques can considerably improve your ac circuit performance. 8 S-429 Rev. H, 8-Jul- THE PROUCTS ESCRIBE HEREIN AN THIS OCUMENT ARE SUBJECT TO SPECIFIC ISCLAIMERS, SET FORTH AT /doc?9000

9 G540, G54, G542 APPLICATIONS Power Supplies A useful feature of the G54X family is its power supply flexibility. It can be operated from a single positive supply () if required ( connected to ground). Note that the analog signal must not exceed by more than V to prevent forward biasing the substrate p-n junction. The use of a supply has a number of advantages:. It allows flexibility in analog signal handling, i.e., with = - 5 V and = 2 V; up to ± 5 V ac signals can be controlled. 2. The value of on capacitance [C S(on) ] may be reduced. A property known as the body-effect on the MOS switch devices causes various parametric effects to occur. One of these effects is the reduction in C S(on) for an increasing V body-source. Note, however, that to increase normally requires to be reduced (since to = 2 V max.). Reduction in causes an increase in R S(on), hence a compromise has to be achieved. It is also useful to note that optimum video linearity performance (e.g., differential phase and gain) occurs when is around - 3 V. S S 2 S 3 S 4 C = 0 μ F Tantalum C 2 = 0. μ F Ceramic - 3 V + 5 V Figure 7. Supply ecoupling + C C 2 G540 + s C C eliminates the need to bias the analog signal using potential dividers and large coupling capacitors. ecoupling It is an established RF design practice to incorporate sufficient bypass capacitors in the circuit to decouple the power supplies to all active devices in the circuit. The dynamic performance of the G54X is adversely affected by poor decoupling of power supply pins. Also, of even more significance, since the substrate of the device is connected to the negative supply, adequate decoupling of this pin is essential. Rules:. ecoupling capacitors should be incorporated on all power supply pins (, ). (See Figure 7.) 2. They should be mounted as close as possible to the device pins. Board Layout PCB layout rules for good high frequency performance must be observed to achieve the performance boasted by the G540. Some tips for minimizing stray effects are:. Use extensive ground planes on double sided PCB, separating adjacent signal paths. Multilayer PCB is even better. 2. Keep signal paths as short as practically possible, with all channel paths of near equal length. 3. Careful arrangement of ground connections is also very important. Star connected system grounds eliminate signal current flowing through ground path parasitic resistance from coupling between channels. 3. Capacitors should have good high frequency characteristics - tantalum bead and/or monolithic ceramic types are adequate. Suitable decoupling capacitors are - to 0 µf tantalum bead, plus 0- to 00 nf ceramic. S-429 Rev. H, 8-Jul- 9 THE PROUCTS ESCRIBE HEREIN AN THIS OCUMENT ARE SUBJECT TO SPECIFIC ISCLAIMERS, SET FORTH AT /doc?9000

10 G540, G54, G542 APPLICATIONS Figure 8 shows a 4 Channel video multiplexer using a G V CH CH 2 CH 3 CH 4 Si582 + A = 2 - IS G Ω - 3 V 250 Ω TTL Channel Select Figure 8. 4 by Video Multiplexing Using the G540 Figure 9 shows an RGB selector switch using two G542s. + 5 V R R 2 Red Out G G 2 Green Out G542-3 V + 5 V Si584 B B 2 Blue Out Sync Sync 2 RGB Source Select G542 Sync Out - 3 V Figure 9. RGB Selector Using Two G542s maintains worldwide manufacturing capability. Products may be manufactured at one of several qualified locations. Reliability data for Silicon Technology and Package Reliability represent a composite of all qualified locations. For related documents such as package/tape drawings, part marking, and reliability data, see /ppg? S-429 Rev. H, 8-Jul- THE PROUCTS ESCRIBE HEREIN AN THIS OCUMENT ARE SUBJECT TO SPECIFIC ISCLAIMERS, SET FORTH AT /doc?9000

11 Package Information JEEC Part Number: MS E im Min Max Min Max A A B C E e.27 BSC BSC H L ECN: S Rev. F, 09-Jul-0 WG: 5300 H C All Leads e B A L 0.0 mm IN ocument Number: Jul-0

12 Package Information E E S Q A A L B e B C e A 5 MAX im Min Max Min Max A A B B C E E e e A L Q S ECN: S Rev., 09-Jul-0 WG: 5482 ocument Number: Jul-0

13 Package Information E E S Q A A A L B e B C e A 5 MAX im Min Max Min Max A A B B C E E e e A L Q S ECN: S Rev. B, 09-Jul-0 WG: 5484 ocument Number: Jul-0

14 Package Information SQUARE A 2 SQUARE e B B 2 im Min Max Min Max A A A B B e.27 BSC BSC A ECN: S Rev. C, 09-Jul-0 WG: 5306 A 0.0 mm ocument Number: Jul-0

15 Package Information E S S 2 Q A L b 2 e b c ea im Min Max Min Max A b b c E e 2.54 BSC 0.00 BSC e A 7.62 BSC BSC L Q S S ECN: S Rev. G, 09-Jul-0 WG: 548 ocument Number: Jul-0

16 Package Information Meets MIL-ST-835, 8, Configuration C E 2 3 S S 2 A Q L b 2 e b C e A im Min Max Min Max A b b c E e 2.54 BSC 0.00 BSC e A 7.62 BSC BSC L Q S S ECN: S Rev., 09-Jul-0 WG: 5309 ocument Number: Jul-0

17 Application Note 826 RECOMMENE MINIMUM PAS FOR SO-6 RECOMMENE MINIMUM PAS FOR SO (9.449) (.94) APPLICATION NOTE (6.248) 0.52 (3.86) (0.559) (.270) (0.7) Recommended Minimum Pads imensions in Inches/(mm) Return to Index Return to Index ocument Number: Revision: 2-Jan-08

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19 Mouser Electronics Authorized istributor Click to View Pricing, Inventory, elivery & Lifecycle Information: Vishay: G540AP G542AP G540J G542Y G542J G540N G54Y G54J G54AP G540N-E3 G54J-E3 G54Y-T G542Y-T G54Y-E3 G542Y-E3 G540J-E3 G542J-E3 G54Y-T- E3 G542Y-T-E3 G540AP/883