Precision, 4-Channel/Dual 2-Channel, Low-Voltage, CMOS Analog Multiplexers

Transcription

1 9-7; Rev. ; /98 Precision, 4-Channel/Dual 2-Channel, General Description The AX48/AX49 precision, monolithic, COS analog multiplexers (muxes) offer low on-resistance (less than ), which is matched to within 4 between channels and remai flat over the specified analog signal range ( max). They also offer low leakage over temperature (NO-off leakage current less than 2nA at +8 C) and fast switching speeds (traition time less than 2). The AX48 is a 4-channel device, and the AX49 is a dual 2-channel device. The AX48/AX49 are fabricated with axim s low-voltage silicon-gate process. Design improvements yield extremely low charge injection (less than pc) and guarantee electrostatic discharge protection greater than 2. These muxes operate with a single +2.7 to supply or with bipolar ±2.7 to ±8 supplies, while retaining COS-logic input compatibility and fast switching. COS inputs provide reduced input loading. Applicatio Sample-and-Hold Circuits Automatic Test Equipment Heads-Up Displays Guidance and Control Systems ilitary Radios Communicatio Systems Battery-Operated Systems PBX, PABX Audio Signal Routing Low-oltage Data-Acquisition Systems Features Guaranteed On-Resistance atch Between Channels (<4 ) Low On-Resistance (< ) Guaranteed Flat On-Resistance over Signal Range (<) Guaranteed Low Charge Injection (<pc) NO-Off Leakage Current <2nA at +8 C -Off Leakage Current <na at +8 C Electrostatic Discharge Protection >2 Single-Supply Operation (+2.7 to ) Bipolar-Supply Operation (±2.7 to ±8) Low Power Coumption (<3µW) Rail-to-Rail Signal Handling TTL/COS-Logic Compatible Ordering Information PART TEP. RANGE PIN-PACKAGE AX48CPD AX48CSD AX48CEE C to +7 C C to +7 C C to +7 C 4 Plastic DIP 4 SO 6 QSOP AX48C/D C to +7 C Dice* AX48EPD C to +7 C 4 Plastic DIP AX48ESD AX48EEE -4 C to +8 C -4 C to +8 C 4 SO 6 QSOP AX48JD - C to +2 C 4 CERDIP** Ordering Information continued at end of data sheet. * Contact factory for dice specificatio. ** Contact factory for package availability. AX48/AX49 Pin Configuratio TOP IEW AX48 AX49 6 A 6 A NO 4 3 NO3 NOA 4 3 NOB NO2 2 NO4 NO2A 2 NO2B A 8 9 B QSOP = NOT INTERNALLY CONNECTED QSOP axim Integrated Products For free samples & the latest literature: or phone For small orders, phone

2 AX48/AX49 ABSOLUTE AXIU RATINGS (oltage Referenced to ) to to -7 to to +7 oltage into NO_, NC_ (Note )...( -.3) to ( +.3) or 3mA (whichever occurs first) oltage into,, A (Note )...( -.3) to ( + 7) Current into Any Terminal...3mA Peak Current, Any Terminal (pulsed at ms, % duty cycle max)...4ma Stresses beyond those listed under Absolute aximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditio beyond those indicated in the operational sectio of the specificatio is not implied. Exposure to absolute maximum rating conditio for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS Dual Supplies Continuous Power Dissipation (T A = +7 C) Plastic DIP (derate.mw/ C above +7 C)...8mW Narrow SO (derate 8.mW/ C above +7 C)...64mW QSOP (derate 9.2mW/ C above +7 C)...762mW CERDIP (derate 9.9mW/ C above +7 C)...727mW Operating Temperature Ranges AX48C /AX49C... C to +7 C AX48E /AX49E...-4 C to +8 C AX48JD/AX49JD...- C to +2 C Storage Temperature Range...-6 C to + C Lead Temperature (soldering, sec)...+3 C Note : Signals on any terminal exceeding or are clamped by internal diodes. Limit forward current to maximum current ratings. ( = +4. to +., = -4. to -., =, AH = H = 2.4, AL = L =.8,, unless otherwise noted.) PARAETER SYBOL CONDITIONS IN TYP AX (Note 2) UNITS SWITCH Analog Signal Range Channel On-Resistance On-Resistance atching Between Channels (Note 4) On-Resistance Flatness (Note ) NO-Off Leakage Current (Note 6) -Off Leakage Current (Note 6) -On Leakage Current (Note 6), NO R ON R ON R FLAT(ON) I NO(OFF) I (OFF) I (ON) (Note 3) I NO = ma, = ±3 I NO = ma, = ±3., =, = I NO = ma; = ±3, ; = ; = NO = ±4., = 4., =., = -. AX48 = ±4., NO = 4., =., = -. AX49 ± = ±4., NO = ±4., ± AX48 AX49 T A = T IN to T A = T IN to T A = T IN to T A = T IN to T A = T IN to na na na - - 2

3 ELECTRICAL CHARACTERISTICS Dual Supplies (continued) ( = +4. to +., = -4. to -., =, AH = H = 2.4, AL = L =.8,, unless otherwise noted.) PARAETER DIGITAL INPUT Logic High Input oltage Logic Low Input oltage Input Current with Input oltage High Input Current with Input oltage Low SUPPLY Power-Supply Range Positive Supply Current Negative Supply Current Ground Current DYNAIC Traition Time Break-Before-ake Interval Enable Turn-On Time Enable Turn-Off Time SYBOL AH, H AL, L I AH, I H I AL, I L, I+ I- I t TRANS t OP t ON() t OFF() = A = /, =., = -. CONDITIONS IN TYP AX (Note 2) ±2.7 ± UNITS A = = A = =.8 = A = /, =., = -. = A = /, =., = -. Figure 2 Figure 4 Figure 3 Figure AX48/AX49 Charge Injection (Note 3) Q Figure, C L =.nf, S =, R S = pc Off Isolation (Note 7) ISO Figure 6, =, R L = k, f = khz -7 db Crosstalk Between Channels CT Figure 6, = 2.4, f = khz, G = p-p, R L = k -92 db Logic Input Capacitance C IN f = Hz 8 pf NO-Off Capacitance C NO(OFF) f = Hz, = D = pf -Off Capacitance C (OFF) f = Hz, = D = AX48 AX49 6 pf -On Capacitance C (ON) f = Hz, = D = AX48 AX pf 3

4 AX48/AX49 ELECTRICAL CHARACTERISTICS Single Supply ( = +4. to +., =, =, AH = H = 2.4, AL = L =.8,, unless otherwise noted.) PARAETER SWITCH Analog Signal Range On-Resistance On-Resistance atching Between Channels (Note 4) On-Resistance Flatness NO-Off Leakage Current (Note 8) -Off Leakage Current (Note 8) -On Leakage Current (Note 8) DIGITAL INPUT Logic High Input oltage Logic Low Input oltage Input Current with Input oltage High Input Current with Input oltage Low SUPPLY Power-Supply Range Positive Supply Current Negative Supply Current I Supply Current SYBOL, NO R ON R ON R FLAT I NO(OFF) I (OFF) I (ON) AH, H AL, L I AH, I H I AL, I L I+ I- I (Note 3) I NO = ma, = 3., = 4. I NO = ma, = 3, = 4. NO = 4., =, =. = 4., NO =, =. = 4., NO = 4., =. CONDITIONS I NO = ma; = 3, 2, ; = A = =.8 T A = T IN to AX48 T A = T IN to AX49 T A = T IN to AX48 T A = T IN to AX49 T A = T IN to IN TYP AX (Note 2) UNITS na na na A = = = A =, ; =.; = = A =, ; =.; = =, ; A = ; =.; =

5 ELECTRICAL CHARACTERISTICS Single Supply (continued) ( = +4. to +., =, =, AH = H = 2.4, AL = L =.8,, unless otherwise noted.) DYNAIC PARAETER Traition Time Break-Before-ake Interval Enable Turn-On Time Enable Turn-Off Time Charge Injection (Note 3) SYBOL t TRANS t OP t ON() t OFF() Q NO = 3 CONDITIONS C L =.nf, S =, R S = IN TYP AX (Note 2) ELECTRICAL CHARACTERISTICS Single +3 Supply ( = +2.7 to +3.3, =, =, AH = H = 2.4, AL = L =.8,, unless otherwise noted.) UNITS pc AX48/AX49 PARAETER SYBOL CONDITIONS IN TYP AX (Note 2) UNITS SWITCH Analog Signal Range On-Resistance DYNAIC ANALOG R ON (Note 3) I NO =.ma, =., = Traition Time (Note 3) t TRANS Figure, IN = 2.4, INL =, N = Enable Turn-On Time (Note 3) t ON() Figure 3, INH = 2.4, INL =, N =. 2 Enable Turn-Off Time (Note 3) t OFF() Figure 3, INH = 2.4, INL =, N =. 7 4 Charge Injection (Note 3) Q Figure, C L =.nf, S =, R S = pc pc Note 2: The algebraic convention, where the most negative value is a minimum and the most positive value a maximum, is used in this data sheet. Note 3: Guaranteed by design. Note 4: R ON = R ON (max) - R ON (min). Note : Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal ranges; i.e., NO = 3 to and to -3. Note 6: Leakage parameters are % tested at maximum rated hot operating temperature, and guaranteed by correlation at +2 C. Note 7: Worst-case isolation is on channel 4 because of its proximity to the pin. Off isolation = 2log / NO, = output, NO = input to off switch. Note 8: Leakage testing at single supply is guaranteed by correlation testing with dual supplies.

6 AX48/AX49 Typical Operating Characteristics (, unless otherwise noted.) RON () ON-RESISTANCE vs. (DUAL SUPPLIES) () ± = ±3 ± = ± AX398/9 TOC RON () = = ON-RESISTANCE vs. AND TEPERATURE (DUAL SUPPLIES) T A = +2 C T A = +8 C T A = - C () AX398/9 TOC2 RON () = ON-RESISTANCE vs. (SINGLE SUPPLY) = () = AX398/9 TOC3 RON () = = ON-RESISTANCE vs. AND TEPERATURE (SINGLE SUPPLY) T A = +2 C T A = +8 C T A = - C AX398/9 TOC4 OFF-LEAKAGE (pa) =. = -. OFF-LEAKAGE vs. TEPERATURE AX398/9 TOC, ON-LEAKAGE (pa) =. = -. ON-LEAKAGE vs. TEPERATURE AX398/9 TOC () TEPERATURE ( C) TEPERATURE ( C) Qj (pc) CHARGE INJECTION vs. = ± = 3 = () AX398/9 TOC7 I+, I- (na). SUPPLY CURRT vs. TEPERATURE = = = A =, TEPERATURE ( C) I+ I- AX398/9 TOC8 SUPPLY CURRT ()... SUPPLY CURRT vs. INPUT OLTAGE. = = INPUT OLTAGE () AX398/9 TOC9 6

7 Pin Description DIP/SO AX48 QSOP PIN DIP/SO AX49 QSOP NAE Address Logic Input Enable Logic Input FUNCTION Negative Supply oltage Input. Connect to for single-supply operation. 4 4 NO Analog Signal Normally Open number NO2 Analog Signal Normally Open number NOA Analog Signal Normally Open number -A switch NO2A Analog Signal Normally Open number 2 -A switch 6 8 A Analog Signal Common -A switch 6 8 Analog Signal Common 7, 8, 9 6, 7, 9,, 7, 8 6, 7,, Not internally connected 9 9 B Analog Signal Common -B switch 2 NO2B Analog Signal Normally Open number 2 -B switch 3 NOB Analog Signal Normally Open number -B switch 2 NO4 Analog Signal Normally Open number 4 3 NO3 Analog Signal Normally Open number Positive Supply oltage Input 3 3 Logic Ground Input A Address Logic Input AX48/AX49 7

8 AX48/AX49 Applicatio Information Operation with Supply oltages Other than ± Using supply voltages less than ± reduces the analog signal range. The AX48/AX49 muxes operate with ±2.7 to ±8 bipolar supplies or with a +2.7 to single supply. Connect to when operating with a single supply. Both device types can also operate with unbalanced supplies, such as + and. The Typical Operating Characteristics graphs show typical on-resistance with ±3, ±, +3 and supplies. (Switching times increase by a factor of two or more for operation at.) Overvoltage Protection Proper power-supply sequencing is recommended for all COS devices. Do not exceed the absolute maximum ratings, because stresses beyond the listed ratings can cause permanent damage to the devices. Always sequence on first, then, followed by the logic inputs, NO, or. If power-supply sequencing is not possible, add two small signal diodes (D, D2) in series with supply pi for overvoltage protection (Figure ). Adding diodes reduces the analog signal range to one diode drop below and one diode drop * * D above, but does not affect the devices low switch resistance and low leakage characteristics. Device operation is unchanged, and the difference between and should not exceed 7. These protection diodes are not recommended when using a single supply. D2 * * AX48 AX49 NO * INTERNAL PROTECTION DIODES Figure. Overvoltage Protection Using External Blocking Diodes Test Circuits/Timing Diagrams NO NO2 NO3 A AX48 NO4 3 3pF INPUT +3 % t R < 2 t F < 2 NOB NOA, NOB SWITCH OUTPUT 9% A A, NOA NO2A AX49 NO2B B 3 3pF NO4, NO2B t TRANS 9% t TRANS Figure 2. Traition Time 8

9 Test Circuits/Timing Diagrams (continued) A A AX48 NO NO2 NO4 NOB NO2B A, NOA NOA AX49 B k k 3pF 3pF t ON % 9% 9% t R < 2 t F < 2 t OFF AX48/AX49 Figure 3. Enable Switching Time +2.4 NO NO4 INPUT A +3 % t R < 2 t F < 2 A A AX48 3 3pF SWITCH OUTPUT 8% t OP Figure 4. Break-Before-ake Interval 9

10 AX48/AX49 Test Circuits/Timing Diagrams (continued) S R S CHANNEL SELECT Figure. Charge Injection NO A AX48 AX49 C L = nf INPUT +3 OFF ON OFF IS THE EASURED OLTAGE DUE TO CHARGE TRANSFER ERROR Q WH THE CHANNEL TURNS OFF. Q = x C L nf NO IN NETWORK ANALYZER OFF ISOLATION = 2log IN ON LOSS = 2log IN A AX48 AX49 EAS. REF CROSSTALK = 2log IN nf NOTES: EASURETS ARE STANDARDIZED AGAINST SHORT AT SOCKET TERINALS. OFF ISOLATION IS EASURED BETWE AND OFF TERINAL ON EACH SWITCH. ON LOSS IS EASURED BETWE AND ON TERINAL ON EACH SWITCH. CROSSTALK IS EASURED BETWE A AND B TERINALS ON EACH DEICE. SIGNAL DIRECTION THROUGH SWITCH IS REERSED; WORST ALUES ARE RECORDED. Figure 6. Off Isolation, On Loss, Crosstalk CHANNEL SELECT A2 NO A AX48 NO8 AX49 Hz CAPACITANCE ANALYZER f = Hz Figure 7. NO/ Capacitance

11 Functional Diagrams/Truth Tables AX48 AX49 NO NO2A NO2 NO3 NO4 NOA NO2B NOB A B A A AX48 AX49 AX48/AX49 A ON SWITCH A ON SWITCH X X NONE X X NONE NO NA, NOB NO2 N2A, NOB NO3 NA, NO2B NO4 N2A, NO2B "O" AL +.8, "" AH +2.4 Pin Configuratio (continued) TOP IEW AX48 AX49 4 A 4 A NO 4 NO3 NOA 4 NOB NO2 NO4 NO2A NO2B 6 9 A 6 9 B DIP/SO = NOT INTERNALLY CONNECTED DIP/SO

12 AX48/AX49 _Ordering Information (continued) PART AX49CPD AX49CSD AX49CEE AX49C/D AX49EPD AX49ESD AX49JD TEP. RANGE C to +7 C C to +7 C C to +7 C C to +7 C * Contact factory for dice specificatio. ** Contact factory for package availability. PIN-PACKAGE 4 Plastic DIP 4 SO 6 QSOP C to +7 C Dice* -4 C to +8 C - C to +2 C 4 Plastic DIP 4 SO AX49EEE -4 C to +8 C 6 QSOP 4 CERDIP** Chip Topographies AX48 A AX49 A.63" (.6mm).63" (.6mm) NO NO3 NOA NOB NO2 NO4 NO2A NO2B A B.8" (2.mm).8" (2.mm) TRANSISTOR COUNT: 86 SUBSTRATE CONNECTED TO TRANSISTOR COUNT: 86 SUBSTRATE CONNECTED TO axim cannot assume respoibility for use of any circuitry other than circuitry entirely embodied in a axim product. No circuit patent licees are implied. axim reserves the right to change the circuitry and specificatio without notice at any time. 2 axim Integrated Products, 2 San Gabriel Drive, Sunnyvale, CA axim Integrated Products Printed USA is a registered trademark of axim Integrated Products.