MAX399EEE+T ,Precision, 8-Channel/Dual 4-Channel, Low-Voltage, CMOS Analog MultiplexersFeaturesThe MAX398/MAX399 precision, monolithic, CMOS ana- ♦ Pin Compatible with Industry-Standardl ..
MAX399EJE ,Precision, 8-Channel/Dual 4-Channel, Low-Voltage, CMOS Analog MultiplexersGeneral Description ________
MAX399EPE ,Precision, 8-Channel/Dual 4-Channel, Low-Voltage, CMOS Analog MultiplexersApplicationsPART TEMP. RANGE PIN-PACKAGESample-and-Hold CircuitsMAX398CPE 0°C to +70°C 16 Plastic D ..
MAX399ESE ,Precision, 8-Channel/Dual 4-Channel, Low-Voltage, CMOS Analog MultiplexersMAX398/MAX39919-0299; Rev. 2; 7/96Precision, 8-Channel/Dual 4-Channel,Low-Voltage, CMOS Analog Mult ..
MAX399ESE+ ,Precision, 8-Channel/Dual 4-Channel, Low-Voltage, CMOS Analog MultiplexersELECTRICAL CHARACTERISTICS—Dual Supplies(V+ = +5V ±10%, V- = -5V ±10%, GND = 0, V = V = +2.4V, V = ..
MAX399ESE+ ,Precision, 8-Channel/Dual 4-Channel, Low-Voltage, CMOS Analog MultiplexersELECTRICAL CHARACTERISTICS—Dual Supplies(V+ = +5V ±10%, V- = -5V ±10%, GND = 0, V = V = +2.4V, V = ..
MAX749ESA+ ,Digitally Adjustable LCD Bias SupplyFeaturesThe MAX749 generates negative LCD-bias contrast♦ +2.0V to +6.0V Input Voltage Rangevoltages ..
MAX749ESA+T ,Digitally Adjustable LCD Bias SupplyMAX74919-0143; Rev 1; 2/95Digitally Adjustable LCD Bias Supply_______________
MAX7500MSA ,Digital Temperature Sensors and Thermal Watchdog with Bus Lockup ProtectionFeaturesThe MAX7500/MAX7501/MAX7502 temperature sen- Timeout Prevents Bus Lockupsors accurately m ..
MAX7500MSA ,Digital Temperature Sensors and Thermal Watchdog with Bus Lockup ProtectionApplicationsMAX7502MUA -55°C to +125°C 8 µMAX2PCsI C is a trademark of Philips Corp.2Purchase of I ..
MAX7500MSA+ ,Digital Temperature Sensors and Thermal Watchdog with Bus Lockup ProtectionApplications+125°CPCs Ordering Information/Selector Guide continued at end ofdata sheet.ServersPin ..
MAX7500MSA+T ,Digital Temperature Sensors and Thermal Watchdog with Bus Lockup Protectionfeatures three address select lines, while♦ Register Readback Capabilitythe MAX7501–MAX7504 feature ..
MAX398CSE+-MAX398CSE+T-MAX398ESE+-MAX399CEE+-MAX399CPE+-MAX399CSE+-MAX399CSE+T-MAX399EEE+-MAX399EEE+T-MAX399ESE+
Precision, 8-Channel/Dual 4-Channel, Low-Voltage, CMOS Analog Multiplexers
General DescriptionThe MAX398/MAX399 precision, monolithic, CMOS ana-
log multiplexers (muxes) offer low on-resistance (less
than 100Ω), which is matched to within 6Ωbetween
channels and remains flat over the specified analog sig-
nal range (11Ωmax). They also offer low leakage over
temperature (NO off-leakage current less than 2.5nA at
+85°C) and fast switching speeds (transition time less
than 250ns). The MAX398 is an 8-channel device, and
the MAX399 is a dual 4-channel device.
The MAX398/MAX399 are fabricated with Maxim’s low-
voltage silicon-gate process. Design improvements yield
extremely low charge injection (less than 5pC) and guar-
antee electrostatic discharge protection (ESD) greater
than 2000V.
These muxes operate with a single +3V to +15V supply or
bipolar ±3V to ±8V supplies, while retaining CMOS-logic
input compatibility and fast switching. CMOS inputs pro-
vide reduced input loading. The MAX398/MAX399 are
pin compatible with the industry-standard DG408,
DG409, DG508A, and DG509A.
ApplicationsSample-and-Hold Circuits
Automatic Test Equipment
Heads-Up Displays
Guidance and Control Systems
Military Radios
Communications Systems
Battery-Operated Systems
PBX, PABX
Audio Signal Routing
Low-Voltage Data-Acquisition Systems
FeaturesPin Compatible with Industry-Standard
DG408/DG409/DG508A/DG509AGuaranteed On-Resistance Match
Between Channels (< 6Ω)Low On-Resistance (< 100Ω)Guaranteed Flat On-Resistance over Signal
Range (< 11Ω)Guaranteed Low Charge Injection (< 5pC)NO Off-Leakage Current < 1nA at +85°CCOM Off-Leakage Current < 2.5nA at +85°CESD Protection > 2000V+3V to +15V Single-Supply Operation
±3V to ±8V Bipolar-Supply OperationLow Power Consumption (< 300µW)Rail-to-Rail Signal HandlingTTL/CMOS-Logic Compatible
MAX398/MAX399
Precision, 8-Channel/Dual 4-Channel,
Low-Voltage, CMOS Analog MultiplexersGNDN01
TOP VIEW
MAX398
NO5
NO6
NO7
NO8
*EP = EXPOSED PAD, CONNECT EP TO V+.
COM
N04
N03
N02
DIP/SO/QSOP
QFNGND
NO1BN01A
MAX399
NO2B
NO3B
NO4B
COMBCOMA
N04A
N03A
N02A
DIP/SO/QSOPA0A1GND
N04A
COMACOMB
N04B
N01A
N02A
N03A
N01B
N02B
N03B1514478
MAX399
QFNA0A1A2
N04
COM
N08N07
N01
N02
N03
GND
N05
N061514478
MAX398
*EP*EP
Pin Configurations19-0299; Rev. 6; 6/07
Ordering Information
PARTTEMP RANGEPIN-
PACKAGE
PKG
CODE
MAX398CGE0°C to +70°C16 QFN-EP*G1655-3
MAX398CEE0°C to +70°C16 QSOPE16-1
MAX398CSE0°C to +70°C16 NarrowS16-1
MAX398CPE0°C to +70°C16 PlasticP16-1
MAX398C/D0°C to +70°CDice**—
MAX398EGE-40°C to + 85°C16 QFN-EP*G1655-3
MAX398EEE-40°C to + 85°C16 QSOPE16-1
MAX398ESE-40°C to + 85°C16 NarrowS16-1
MAX398EPE-40°C to + 85°C16 PlasticP16-1
MAX398EJE-40°C to + 85°C16 CERDIPJ16-1
MAX398MJE-55°C to +125°C16 CERDIPJ16-1
Ordering Information continued at end of data sheet.*EP = Exposed pad.
**Contact factory for dice specifications.
MAX398/MAX399
Precision, 8-Channel/Dual 4-Channel,
Low-Voltage, CMOS Analog Multiplexers
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS—Dual Supplies(V+ = +5V ±10%, V- = -5V ±10%, GND = 0, VAH= VENH= +2.4V, VAL= VENL= +0.8V, TA= TMINto TMAX, unless otherwise noted.)
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.
Voltage Referenced to GND
V+.......................................................................-0.3V to +17V
V-........................................................................+0.3V to -17V
V+ to V-...............................................................-0.3V to +17V
Voltage into Any Terminal (Note 1).........(V- - 2V) to (V+ + 2V) or
30mA (whichever occurs first)
Current into Any Terminal...................................................30mA
Peak Current, Any Terminal
(pulsed at 1ms, 10% duty cycle max)............................40mA
Continuous Power Dissipation (TA= +70°C)
QFN (derate 18.5mW/°C above +70°C)....................1484mW
QSOP (derate 8.3mW/°C above +70°C)......................667mW
Narrow SO (derate 8.7mW/°C above +70°C)..............696mW
Plastic DIP (derate 7.5mW/°C above +70°C)...............470mW
CERDIP (derate 10.0mW/°C above +70°C.................. 900mW
Operating Temperature Ranges
MAX39_C_ _.......................................................0°C to +70°C
MAX39_E_ _.....................................................-40°C to +85°C
MAX39_MJE..................................................-55°C to +125°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
VCOM= ±4.5V,
VNO = 4.5V,
V+ = 5.5V, V- = -5.5V
VCOM= ±4.5V,
VNO = 4.5V,
V+ = 5.5V, V- = -5.5V
CONDITIONS-10+10
ICOM(OFF)COM Off-Leakage Current
(Note 6)
-1.5+1.5
-0.1+0.1
-20+20
-2.5+2.5
-0.2+0.260100V-V+VCOM, VNOAnalog Signal Range
-10+10
INO(OFF)NO Off-Leakage Current
(Note 6)-1.0+1.0nA
-0.1+0.1RFLAT(ON)On-Resistance Flatness
(Note 5)
125RONChannel On-Resistance6ΔRONRONMatching Between
Channels (Note 4)11
UNITSMINTYPMAX
(Note 2)SYMBOLPARAMETER= TMIN
to TMAX= TMIN
to TMAX= TMIN
to TMAX
MAX399
VNO= ±4.5V, VCOM = 4.5V,
V+ = 5.5V, V- = -5.5V
MAX398
INO= 1mA, VCOM = ±3V,
V+ = 5V, V- = -5V
INO= 1mA, VCOM = ±3.5V
INO= 1mA, VCOM = ±3.5V,
V+ = 5V, V- = -5V= +25°C
(Note 3)
C, E
C, E= +25°C= +25°C= TMINto TMAX= TMINto TMAX= +25°C= TMINto TMAX
C, E= +25°C= +25°C
Note 1:Signals on any terminal exceeding V+ or V- are clamped by internal diodes. Limit forward current to maximum current ratings.
VCOM= ±4.5V,
VNO = ±4.5V
-20+20
ICOM(ON)COM On-Leakage Current
(Note 6)
-2.5+2.5
-0.2+0.2
-40+40+5
-0.4+0.4= TMIN
to TMAX= TMIN
to TMAX
MAX399
MAX398
C, E= +25°C
C, E= +25°C
SWITCH
VEN= VA= 0V/V+,
V+ = 5.5V, V- = -5.5V
MAX398/MAX399
Precision, 8-Channel/Dual 4-Channel,
Low-Voltage, CMOS Analog Multiplexersf = 1MHz,
VEN= VD= 0V
f = 1MHz,
VEN= VD= 0V
CONDITIONSCCOM(ON)COM On-CapacitancepF54CCOM(OFF)COM Off-CapacitancepF4011CNO(OFF)NO Off-Capacitance8CINLogic Input Capacitance-92VCTCrosstalk Between Channels-75Off-Isolation (Note 7)25QCharge Injection (Note 3)250tON(EN)Enable Turn-On Time601502.4VAH, VENHLogic-High Input Voltage040tOPENBreak-Before-Make Interval150tTRANSTransition Time+1IGNDGround Current±3±8Power-Supply Range-1+1I+Positive Supply Current-1+1I-Negative Supply Current-1+1
UNITSMINTYPMAX
(Note 2)SYMBOLPARAMETERMAX399
MAX398
MAX399
MAX398
f = 1MHz, VEN= VD= 0V
f = 1MHz
VEN= 2.4V, f = 100kHz,
VGEN= 1VP-P, RL= 1kΩ
Figure 4
Figure 2
VEN= 0, RL= 1kΩ, f = 100kHz= 10nF, VS= 0, RS= 0Ω
VEN= VA= 0V/V+,
V+ = 5.5V, V- = -5.5V
Figure 3= +25°C= +25°C= +25°C= +25°C= +25°C= +25°C= +25°C= +25°C= TMINto TMAX= +25°C= TMINto TMAX= TMINto TMAX= +25°C= +25°C
ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)(V+ = +5V ±10%, V- = -5V ±10%, GND = 0, VAH= VENH= +2.4V, VAL= VENL= +0.8V, TA= TMINto TMAX, unless otherwise noted.)0.8VAL, VENLLogic-Low Input VoltageTA= TMINto TMAX= TMINto TMAXVA= VEN= 0.8V= VEN= 2.4VµA-0.1+0.1IAH, IENHInput Current with
Input-Voltage High
-0.1+0.1IAL, IENLInput Current with
Input-Voltage Low
VEN= VA= 0V/V+,
V+ = 5.5V, V- = -5.5V200tOFF(EN)Enable Turn-Off Time40150Figure 3TA= TMINto TMAX= +25°C
DIGITAL LOGIC INPUT
SUPPLY
DYNAMIC
MAX398/MAX399
Precision, 8-Channel/Dual 4-Channel,
Low-Voltage, CMOS Analog MultiplexersVCOM= 4.5V,
VNO = 4.5V,
V+ = 5.5V
-20+20
ICOM(ON)COM On-Leakage Current
(Note 8)
-2.5+2.5
-0.2+0.2
-40+40+5
VCOM= 4.5V,
VNO = 0,
V+ = 5.5V
-0.4+0.4= TMIN
to TMAX= TMIN
to TMAX
MAX399
VCOM= 4.5V,
VNO = 0,
V+ = 5.5V
MAX398
C, E= +25°C
C, E= +25°C
CONDITIONS-10+10
ICOM(OFF)COM Off-Leakage Current
(Note 8)
-1.5+1.5
-0.1+0.1
-20+20
-2.5+2.5
-0.2+0.2150225V-V+VCOM, VNOAnalog Signal Range
-10+10
INO(OFF)NO Off-Leakage Current
(Note 8)-1.0+1.0nA
-0.1+0.122RFLATOn-Resistance Flatness
280RONOn-Resistance11ΔRONRONMatching Between
Channels (Note 4)1018
UNITSMINTYPMAX
(Note 2)SYMBOLPARAMETER= TMIN
to TMAX= TMIN
to TMAX= TMIN
to TMAX
MAX399
VNO= 4.5V, VCOM = 0,
V+ = 5.5V
MAX398
INO= 1mA; VCOM = 3V, 2V, 1V;
V+ = 5V
INO= 1mA, VCOM = 3.5V,
V+ = 4.5V
INO= 1mA, VCOM = 3.5V,
V+ = 4.5V= +25°C
(Note 3)
C, E
C, E= +25°C= +25°C= TMINto TMAX= TMINto TMAX= +25°C= TMINto TMAX
C, E= +25°C= +25°CTA= TMINto TMAX= TMINto TMAXVA= 0
VEN= 0.8V= VEN= 2.4VµA-0.1+0.1IAH, IENH2.4VAH, VENHLogic-High Input Voltage
-1.0+1.0IGNDIGNDSupply Current315Power-Supply Range-1.0+1.0I+Positive Supply Current-1.0+1.0I-Negative Supply Current-1.0+1.0
Input Current with
Input-Voltage High
-0.1+0.1
0.8VAL, VENLLogic-Low Input Voltage
IAL, IENLInput Current with
Input-Voltage Low
VEN= V+, 0; VA= 0;
V+ = 5.5V; V- = 0TA= TMINto TMAX
VEN= VA= 0, V+; V+ = 5.5V; V- = 0
VEN= VA= 0V, V+; V+ = 5.5V; V- = 0= +25°C
ELECTRICAL CHARACTERISTICS—Single +5V(V+ = 5V ±10%, V- = 0, GND = 0, VAH= VENH= +2.4V, VAL= VENL= +0.8V, TA= TMINto TMAX, unless otherwise noted.)
SWITCH
DIGITAL LOGICINPUT
SUPPLY
MAX398/MAX399
Precision, 8-Channel/Dual 4-Channel,
Low-Voltage, CMOS Analog Multiplexers
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:ΔRON= RONMAX - RONMIN.
Note 5: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., VNO= 3V to 0 and 0 to -3V.
Note 6:Leakage parameters are 100% tested at maximum rated hot operating temperature, and guaranteed by correlation at +25°C.
Note 7:Worst-case isolation is on channel 4 because of its proximity to the COM pin. Off-isolation = 20log VCOM / VNO, VCOM= output,
VNO= input to off switch.
Note 8:Leakage testing at single supply is guaranteed by correlation testing with dual supplies.
CONDITIONS275tON(EN)Enable Turn-On Time1.55QCharge Injection (Note 3)
tOPENBreak-Before-Make Interval90245tTRANSTransition Time
UNITSMINTYPMAX
(Note 2)SYMBOLPARAMETER200= TMINto TMAX= +25°C= 10nF, VS= 0, RS= 0Ω= +25°C
VNO= 3V= +25°C
ELECTRICAL CHARACTERISTICS—Single +5V (continued)(V+ = 5V ±10%, V- = 0, GND = 0, VAH= VENH= +2.4V, VAL= VENL= +0.8V, TA= TMINto TMAX, unless otherwise noted.)
ELECTRICAL CHARACTERISTICS—Single +3V (V+ = 3V ±10%, V- = 0, GND = 0, VAH= VENH= +2.4V, VAL= VENL= +0.8V, TA= TMINto TMAX, unless otherwise noted.)
CONDITIONSEnable Turn-Off Time (Note 3)15QCharge Injection (Note 3)
230375V-V+VANALOGAnalog Signal Range
UNITSMINTYPMAX
(Note 2)SYMBOLPARAMETERFigure 3, VINH= 2.4V,
VINL= 0, VN01= 1.5V= 10nF, VS= 0, RS= 0Ω= +25°C
(Note 3)= +25°C425RONOn-ResistanceINO= 1mA, VCOM= 1.5V,
V+ = 3VTA= TMINto TMAX230575tTRANSTransition Time (Note 3)Figure 2, VIN= 2.4V,
VN01= 1.5V, VN08= 0TA= +25°C400tOFF(EN)TA= +25°C200500tON(EN)Enable Turn-On Time (Note 3)Figure 3, VINH= 2.4V,
VINL= 0, VN01= 1.5VTA= +25°C
SWITCH
DYNAMIC1040200tOFF(EN)Enable Turn-Off Time50125= TMINto TMAX= +25°C
DYNAMIC
MAX398/MAX399
Precision, 8-Channel/Dual 4-Channel,
Low-Voltage, CMOS Analog Multiplexers
__________________________________________Typical Operating Characteristics(TA = +25°C, unless otherwise noted.)
ON-RESISTANCE vs. VCOM
(DUAL SUPPLIES)
MAX398/9 toc01
VCOM (V)3
V± = ±5V
V± = ±3V
ON-RESISTANCE vs. VCOM
AND TEMPERATURE
(DUAL SUPPLIES)
MAX398/9 toc02
VCOM (V)3
V+ = 5V
V- = -5V
TA = +125°C
TA = +85°C
TA = +25°C
TA = -55°C
ON-RESISTANCE vs. VCOM
(SINGLE SUPPLY)
MAX398/9 toc03
VCOM (V)
V+ = 3V
V- = 0V
V+ = 5V
ON-RESISTANCE vs. VCOM
AND TEMPERATURE
(SINGLE SUPPLY)
MAX398/9 toc04
VCOM (V)
TA = +25°C
TA = -55°C
TA = +85°C
TA = +125°C
V+ = 5V
V- = 0V-31
CHARGE INJECTION vs. VCOM MAX398/9 toc07
VCOM (V)
Qj (pC)3-40-224
V+ = 5V
V- = -5V
V+ = 5V
V- = 0V
OFF-LEAKAGE
vs. TEMPERATURE
MAX398/9 toc05
TEMPERATURE (°C)
OFF-LEAKAGE (pA)
V+ = 5.5V
V- = -5.5V
ON-LEAKAGE
vs. TEMPERATURE
10,000
MAX398/9 toc06
TEMPERATURE (°C)
ON-LEAKAGE (pA)10
V+ = 5.5V
V- = -5.5V
SUPPLY CURRENT
vs. TEMPERATURE
MAX398/9 toc08
TEMPERATURE (°C)
I+, I- (nA)
V+ = 5V
V- = -5V
VEN = VA = 0V, 5V
MAX398/MAX399
Precision, 8-Channel/Dual 4-Channel,
Low-Voltage, CMOS Analog Multiplexers
Pin Description
PIN
MAX398MAX399
QSOP/DIP/QFNQSOP/DIP/QFN
NAMEFUNCTION1, 15, 1615, 14, 13——A0, A2, A1Address Inputs—1, 1615, 14A0, A1Address Inputs16216ENEnable131V-Negative-Supply Voltage Input
4–72–5——N01–N04Analog Inputs—Bidirectional—4–72–5N01A–N04AAnalog Inputs—Bidirectional6——COMAnalog Output—Bidirectional—8, 96, 7COMA, COMBAnalog Outputs—Bidirectional
9–127–10——N08–N05Analog Inputs—Bidirectional–10–138–11N04B–N01BAnalog Inputs—Bidirectional111412V+Positive-Supply Voltage Input121513GNDGroundEP—EPEPExposed Pad. Connect to V+.
MAX398/MAX399
Applications Information
Operation with Supply Voltages
Other than ±5VUsing supply voltages less than ±5V reduces the analog
signal range. The MAX398/MAX399 muxes operate with
±3V to ±8V bipolar supplies or with a +3V to +15V single
supply. Connect V- to GND when operating with a single
supply. Both device types can also operate with unbal-
anced supplies, such as +10V and -5V. The Typical
Operating Characteristicsgraphs show typical on-resis-
tance with ±3V, ±5V, +3V, and +5V supplies. (Switching
times increase by a factor of two or more for operation at
+5V.)
Overvoltage Protection Proper power-supply sequencing is recommended for
all CMOS devices. Do not exceed the absolute maxi-
mum ratings, because stresses beyond the listed rat-
ings can cause permanent damage to the devices.
Always sequence V+ on first, then V-, followed by the
logic inputs, NO, or COM. If power-supply sequencing
is not possible, add two small signal diodes (D1, D2) in
series with supply pins for overvoltage protection
(Figure 1). Adding diodes reduces the analog signal
range to one diode drop below V+ and one diode drop
above V-, but does not affect the devices’ low switch
resistance and low leakage characteristics. Device
operation is unchanged, and the difference between
V+ and V- should not exceed 17V. These protection
diodes are not recommended when using a single supply.
Precision, 8-Channel/Dual 4-Channel,
Low-Voltage, CMOS Analog Multiplexersest Circuits/Timing DiagramsCOM
* INTERNAL PROTECTION DIODES
-5V
+5V
MAX398
MAX399
Figure 1. Overvoltage Protection Using External Blocking Diodes
50%
tTRANS
tR < 20nsF < 20ns
VOUT
+3V
VNO1
VNO8
LOGIC
INPUT
VEN
SWITCH
OUTPUT
+5V
VOUT
-5V
GND
NO1
NO2–NO7
NO8
COM
+5V
-5V
50Ω
MAX398
300Ω
35pF
+5V
VOUT
-5V
GND
NO1B
NO1A–NO4A
NO4B
COMB
+5V
50Ω
MAX399
300Ω35pF
90%
90%
tTRANS
-5V
VEN
VEN
Figure 2. Transition Time
MAX398/MAX399
Precision, 8-Channel/Dual 4-Channel,
Low-Voltage, CMOS Analog Multiplexers50%
tOFF(EN)R < 20ns
tF < 20ns+3V
LOGIC
INPUT
VEN
SWITCH
OUTPUT
VOUT
+5V
VOUT
-5V
GNDNO1
NO2–NO8
COM
+5V
50Ω
MAX398
1kΩ35pF
90%
10%
tON(EN)
+5V
VOUT
-5V
GNDNO1B
NO1A–NO4A
NO2B–NO4B,
COMA
COMB
+5V
50Ω
MAX399
1kΩ35pF
VEN
VEN
Figure 3. Enable Switching Time
50%
tOPEN
tR < 20ns
tF < 20ns
+5V
+3V
LOGIC
INPUT
SWITCH
OUTPUT
VOUT
+5V
VOUT
-5V
GND
NO1–NO8
COM
+5V
50Ω
MAX398
300Ω
35pF
80%
+2.4V
VEN
Test Circuits/Timing Diagrams (continued)Figure 4. Break-Before-Make Interval
MAX398/MAX399
Precision, 8-Channel/Dual 4-Channel,
Low-Voltage, CMOS Analog MultiplexersΔVOUT
+3V
LOGIC
INPUT
VEN
+5V
VOUT
-5V
GND
COM
MAX398
CL = 1000nF
VOUT
CHANNEL
SELECTOFFOFF
ΔVOUT IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER
ERROR Q WHEN THE CHANNEL TURNS OFF.
Q = ΔVOUT x CL
VEN
Figure 5. Charge Injection
Test Circuits/Timing Diagrams (continued)+5V
VOUT
-5V
GND
NO8
COM
MAX398
NO1
RS = 50Ω
VIN
10nF
RL = 1kΩ
OFF-ISOLATION = 20logVOUT
VIN
10nF
+5V
VOUT
-5V
GND
NO8
COM
MAX398
NO2
RG = 50Ω
VIN
10nF
RL = 1kΩ
CROSSTALK = 20logVOUT
VIN
10nF
NO1
R = 1kΩ
+5V
-5V
GNDA2
NO8MAX398
CHANNEL
SELECT
NO1
COM
1MHz
CAPACITANCE
ANALYZER
f = 1MHz
Figure 6. Off-IsolationFigure 7. Crosstalk
Figure 8. NO/COM Capacitance
