PI5A100. Precision, Wide-Bandwidth Quad SPDT Analog Switch. Description. Features. Block Diagram, Pin Configuration. Applications.

Transcription

1 Precision, Wide-Bandwidth Quad SPDT Analog Switch Features Single Supply Operation (+2V to +6V) Rail-to-Rail Analog Signal Dynamic Range Low On-Resistance (6Ω typ with 5V supply) Minimizes Distortion and Error Voltages On-Resistance Matching Between Channels,.4Ω Typ. On-Resistance Flatness, <2Ω Typ. Low Charge Injection Reduces Glitch Errors, Q = 6pC Typ. Replaces Mechanical Relays High Speed. t ON, 8ns Typ. Low Crosstalk: 1 MHz Low Off-Isolation: 1 MHz Wide -3dB Bandwidth: 23 MHz High-Current Channel Capability: >1mA TTL/CMOS Logic Compatible Low Power Consumption (.5µW typ.) Packaging (Pb-free & Green Available): -16-pin QSOP (Q) -16-pin SOIC (W) Applications Audio, Video Switching and Routing LAN Switches Telecommunication Systems Battery-Powered Systems Truth Table EN ON Switch NC 1, NC 2, NC 3, NC 4 1 NO 1, NO 2, NO 3, NO 4 1 X None. Disabled Description The is an improved Quad Single-pole double-throw (4SPDT) CMOS analog switch designed to operate with a single +2V to +6V power supply. The EN pin may be used to place all switches in a high-impedance state. This high precision device is ideal for low-distortion audio, video, and data switching and routing. Each switch conducts current equally well in either direction when on. In the off state each switch blocks voltages up to the power-supply rails. The is fully specified with, and +3.3V supplies. With, it guarantees less than 1Ω On-Resistance. On-Resistance matching between channels is within 2Ω. On-Resistance flatness is less than 4Ω over the specified range. The guarantees fast switching speeds (t ON < 12ns). The is available in the narrow-body SOIC and QSOP packages for operation over the industrial (-4 C to +85 C) temperature range. Block Diagram, Pin Configuration NC 1 NO 1 1 NC 2 NO Decoder V CC EN NC 4 NO 4 4 NC 3 NO 3 3 Notes: 1. Switches shown for logic "" input. 2. NC = Normally Closed; NO = Normally Open 1 PS712H 8/3/4

2 Absolute Maximum Ratings Voltages Referenced to Gnd V CC...-.5V to +7V V, V, V NC, V NO (1)...-.5V to V CC +2V...or 3mA, whichever occurs first Current (any terminal except, NO, NC)... 3mA Current,, NO, NC (pulsed at 1ms, 1% duty cycle)... 12mA Thermal Information Continuous Power Dissipation Narrow SOIC & QSOP (derate 8.7mW/ºC above +7ºC) mW Storage Temperature º C to +15 º C Lead Temperature (soldering, 1s) º C Notes: 1. Signals on NC, NO,, or exceeding V CC or are clamped by internal diodes. Limit forward diode current to 3mA. 2. Caution: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions beyond those indicated in the operational sections of this speci fication is not implied. Electrical Specifications - Single Supply (V CC = ±1%, = V, V H = 2.4V, V L =.8V) Parameter Symbol TestConditions Temp. Min. (1) Typ. (2) Max. (1) Units Analog Switch Analog Switch Range (1) V ANALOG Full V CC V On-Resistance R ON V CC = 4.5V, I = -3mA, Full 12 On-Resistance Match Between Channels (6) R ON V NO or V NC = +2.5V Full 4 On-Resistance Flatness (5) R FLAT(ON) V CC = 5V, I = -3mA, V NO or V NC = +2.5V NO or NC OFF Leakage (6) I NO(OFF) or V CC = 5.5C, I = V, I NC(OFF) V NO or V NC = 4.5V OFF Leakage V Current (6) I CC = 5.5V, I = 4.5V, (OFF) V NO or V NC = ± 4.5V ON Leakage V Current (6) I CC = 5.5V, I = 4.5V, (ON) V NO or V NC = ± 4.5V Full Full Full Full -8 8 Ω na 2 PS712H 8/3/4

3 Electrical Specifications - Single Supply (V CC = ±1%, = V, V H = 2.4V, V L =.8V) CONTUED Parameter Symbol TestConditions Temp. Min. (1) Typ. (2) Max. (1) Units Logic Input Input High Voltage V IH Guaranteed logic High Level Full 2 Input Low Voltage V IL Guaranteed logic Low Level.8 Input Current with Input Voltage High Input Current with Input Voltage Low I H V = 2.4V, all others =.8V Full I L V =.8V, all others = 2.4V V µa Dynamic Turn-On Time t ON Full 2 V CC = 5V, See Figure Turn-Off Time t OFF Full 1 Charge Injection (3) Q C L = 1nF, V GEN = V, R GEN = Ω, See Figure 2 Off Isolations O IRR R L = 5Ω, C L = 5pF, f = 1MHz, See Figure 3 Crosstalk (8) X TALK R L = 5Ω, C L = 5pF, f = 1MHz, See Figure 4 ns 25 1 pc NC or NO Capacitance C (OFF) f=1khz, See Figure 5 8 OFF Capacitance C (OFF) 14 ON Capacitance C (ON ) f = 1kHz, See Figure db Bandwidth BW R L = 5Ω See Figure 7 Full 23 MHz Distortion D R L = 1kΩ.2 % db pf Supply Power-Supply V CC Full 2 6 V Postitive Supply Current I CC V CC = 5.5V, V = V or V CC, all channels on or off 1 µa Notes: 1. The algebraic convention, where the most negative value is a minimum and the most positive is a maximum, is used in this data sheet. 2. Typical values are for DESIGN AID ONLY, not guaranteed or subject to production testing. 3. Guaranteed by design 4. ΔR ΟΝ = R ΟΝ max - R ΟΝ min 5. Flatness is defined as the difference between the maximum and minimum value of On-Resistance measured. 6. Leakage parameters are 1% tested at maximum rated hot temperature and guaranteed by correlation at +25ºC. 7. Off Isolation = 2log 1 [ V / (V NO or V NC ) ]. See figure Between any two switches. See figure PS712H 8/3/4

4 Electrical Specifications - Single +3.3V Supply (V CC = ±1%, = V, V H = 2.4V, V L =.8V) Parameter Symbol TestConditions Temp. Min. (1) Typ. (2) Max. (1) Units Analog Switch Analog Switch Range (1) V CC V On-Resistance R ON V CC = 4.5V, I = -3mA, Full On-Resistance Match Between Channels (6) R ON V NO or V NC = +2.5V 25 5 Full On-Resistance Flatness (5) R FLAT(ON) V CC = 5V, I = -3mA, V NO or V NC = +2.5V Full 5 Ω Dynamic Turn-On Time t ON Full 4 V CC = 5V, See Figure Turn-Off Time t OFF Full 2 Charge Injection (3) Q C L = 1nF, V GEN = V, R GEN = Ω, See Figure 2 ns pc Supply Postitive Supply Current I CC V CC = 3.6V, V = V or V CC, all channels on or off Full 1 µa 4 PS712H 8/3/4

5 Typical Operating Characteristics (T A =+25ºC, unless otherwise noted) R ON vs. V R ON vs. V and Temperature 16 4 Vcc = +2V V CC = A: T A = 9 C B: T A = 25 C C: T A = -4 C 3 12 R ON 2 RON 8 A B C V +7V V (V) Leakage Currents vs. Analog Voltage 1nA Leakage Current vs. Temperature 16 1nA V CC = IA(ON) or IB(ON) Leakage (pa) 8 IA(ON) or IB(ON) Leakage 1pA 1pA I (ON) I (OFF) 1pA -8.1pA Temperature ( C).1pA Temperature ( C) 15 Charge Injection vs. Analog Voltage Crosstalk and Off-Isolation vs. Frequency -1 Q-Charge Injection (pc) 1 5 V CC = 5V V CC = 3.3V (db) Off Isolation Crosstalk VCC = 5V V (V) Frequency (MHz) 5 PS712H 8/3/4

6 Insertion Loss vs. Frequency Input Switching Threshold vs. Supply Voltage Insertion Loss (db) dB Point V, (V) V CC = R L = 5! Frequency (MHz) V CC (V) R ON vs. V and Single Supply Switching Times vs. Temperature t ON, t OFF (ns) t ON, t OFF t ON t OFF (ns) 1 5 t ON t OFF V CC (V) Temperature ( C) 1 Supply Current vs. Temperature V CC = 1 I CC (na) Temperature ( C) 6 PS712H 8/3/4

7 Test Circuits/Timing Diagrams Switch Input +3V* NO or NC Vcc V OUT Logic Input +3V V 5% t r <2ns t f <2ns Logic Input R L 1Ohm C L 15pF Switch Output V t OFF V OUT 9% 9% t ON C L CLUDES FIXTURE AND STRAY CAPACITANCE R V OUT = V L NO ( R L + R ON ) LOGIC PUT WAVEFORMS VERTED FOR SWITCHES THAT HAVE OPPOSITE LOGIC * 1.5V FOR 3.3V SUPPLY Figure 1. Switching Time V GEN Logic Input R GEN.1µF V+ NO or NC C L 1nF V OUT V OUT OFF OFF ON ON V OUT OFF OFF Q = ( V OUT )(C L ) Figure 2. Charge Injection 7 PS712H 8/3/4

8 Test Circuits/Timing Diagrams (continued) 1nF 1nF V+ Signal Generator dbm V+ 1 N1 5Ohm Analyzer 5Ohm 5Ohm NC or NO EN V or 2.4V Analyzer V or 2.4V 5Ohm 2 EN N2 NC 1Ohm Figure 3. Off Isolation Figure 4. Crosstalk 1nF 1nF Capacitance Meter f = 1MHz V+ NC or NO V or 2.4V Capacitance Meter f = 1kHz V+ NC or NO V or 2.4V EN EN Figure 5. Channel-Off Capacitance Figure 6. Channel-On Capacitance 1nF NC or NO VCC Vo R L 1Ohm Rg = 5Ohm EN Figure 7. Bandwidth 8 PS712H 8/3/4

9 Applications Information Overvoltage Protection Proper power-supply sequencing is recommended for all CMOS devices. Do not exceed the absolute maximum ratings, because stresses beyond the listed ratings may cause permanent damage to the devices. Always sequence V+ on first, followed by V-, and then logic inputs. If power-supply sequencing is not possible, add two small signal diodes or two current limiting resistors in series with the supply pins for overvoltage protection (Figure 8). Adding diodes reduces the analog signal range, but low switch resistance and low leakage characteristics are unaffected. NO Positive Supply V+ RGB Switch Figure 9 illustrates a simple low cost RGB switch. The RGB - to-composite Decoder produces either NTSC or S-VHS video from an RGB source. Asingle selects one of the two video sources to produce either SVHS, Composite or RGB video outputs. The low insertion loss of the eliminates the need for expensive input/output buffers. V g V- Figure 8: Overvoltage protection is accomplished using two external blocking diodes or two current limiting resistors. SVGA R-G-B S-Video Connector RGB to Composite Encoder Y Composite C Sync 4 R G B Sync R or Luma.7V G or Composite.714V B or Chroma.28V H-Sync-.3V VGA Connect or Select Composite Connector Figure 9: The single is used to select SVHS, VGA or Composite video outputs. 9 PS712H 8/3/4

10 Applications Audio Muting Function Figure 8 shows the in an audio card muting application. The original problem was one of excessive popping/clicking noise appearing when connecting disconnecting external loads, and at power on/off. The performs a muting function by grounding the outputs at power on/off and during the transition time. The 32Ω headset impedance demands a very low and very flat switchon resistance to reduce THD and signal loss. Paralleling two sections of the produces a Ron of 2.5Ω with an unsurpassed ±.5Ω flatness. To handle AC signals it was necessary to power the device with ±3V provided by two Zener diodes: Z1 and Z2. The select and Enable control signals are shifted by using twpo 2.5V Zener diodes Z3,Z4 and pull down resistors connected to -3V. 1kΩ Stereo Audio Input From DAC Stereo Audio Output J1 J2 32! Select Enable Z3 2.5V Z4 2.5V Vcc -3V -5V Z1 Z2 Z1/Z2 - Dual SMT 3.V Zener 22k! -3V Figure 1: The momentarily mutes the stereo outputs by connecting them to ground during transition times. 1 PS712H 8/3/4

11 Packaging Mechanical: 16-Pin QSOP (Q) Guage Plane.8.2 M Detail A REF.15 x REF Detail A BSC SEATG PLANE X.XX X.XX DENOTES DIMENSIONS MILLIMETERS Packaging Mechanical: 16-Pin SOIC (W) x REF SEATG PLANE BSC X.XX X.XX DENOTES DIMENSIONS MILLIMETERS 11 PS712H 8/3/4

12 Ordering Information Ordering Code Package Code Package Description W W 16-pin SOIC Q Q 16-pin QSOP QE Q Pb-free & Green, 16-pin QSOP Notes: 1. Thermal characteristics can be found on the company web site at 2,. Number of Transistors = TBD Pericom Semiconductor Corporation PS712H 8/3/4

13 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Pericom: QE QEX WEX WE