DG441CY+ ,Improved, Quad, SPST Analog SwitchesFeatures(SPST) analog switches. The DG441 has four normally Low r (85Ω max)DS(ON)closed switches, ..
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DG441DY ,Monolithic / Quad SPST / CMOS Analog SwitchesApplicationsusing a high voltage silicon-gate process. An epitaxial layerprevents the latch-up asso ..
DG441DY ,Monolithic / Quad SPST / CMOS Analog SwitchesDG441/DG44219-4611; Rev 2; 7/96Improved, Quad, SPST Analog Switches_______________
DG441DY ,Monolithic / Quad SPST / CMOS Analog SwitchesGeneral Description __New
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DG441CY+-DG441DY+-DG441DY-T-DG442DY+-DG442DY-T
Improved, Quad, SPST Analog Switches
_____________________Pin Configurations/Functional Diagrams/Truth Tables
_______________General DescriptionMaxim’s redesigned DG441/DG442 analog switches now
feature on-resistance matching (4Ωmax) between
switches and guaranteed on-resistance flatness over the
signal range (9Ωmax). These low on-resistance switches
conduct equally well in either direction. They guarantee
low charge injection (10pC max), low power consumption
(1.65mW), and an ESD tolerance of 2000V minimum per
Method 3015.7. The new design offers lower off-leakage
current over temperature (less than 5nA at +85°C).
The DG441/DG442 are quad, single-pole/single-throw
(SPST) analog switches. The DG441 has four normally
closed switches, and the DG442 has four normally open
switches. Switching times are less than 250ns for tONand
less than 70ns for tOFF. These devices operate from a sin-
gle +10V to +30V supply, or bipolar ±4.5V to ±20V sup-
plies. Maxim’s improved DG441/DG442 continue to be
fabricated with a 44V silicon-gate process.
________________________ApplicationsSample-and-Hold CircuitsPBX, PABX
Communication SystemsGuidance and Control Systems
Test EquipmentAudio-Signal Routing
Battery-Operated SystemsMilitary Radios
Heads-Up DisplaysModems
Fax Machines
______________________New FeaturesPlug-In Upgrades for Industry-Standard DG441/DG442Improved rDS(ON) Match Between Channels(4Ωmax)Guaranteed rFLAT(ON)Over Signal Range (9Ωmax)Improved Charge Injection (10pC max)Improved Off-Leakage Current Over Temperature
(<5nA at +85°C) Withstand Electrostatic Discharge (2000V min)
per Method 3015.7
__________________Existing FeaturesLow rDS(ON)(85Ωmax)Single-Supply Operation +10V to +30V
Bipolar-Supply Operation ±4.5V to ±20VLow Power Consumption (1.65mW max)Rail-to-Rail Signal HandlingTTL/CMOS-Logic Compatible
______________Ordering Information
Improved, Quad, SPST Analog Switches19-4611; Rev 3; 9/01
DG441/DG442
Ordering Information continued at end of data sheet.*Contact factory for dice specifications.
**Contact factory for availability and processing to MIL-STD-883B.
DG441/DG442
Improved, Quad, SPST Analog Switches
ABSOLUTE MAXIMUM RATINGSVoltage Referenced to V-
V+.......................................................................................44V
GND...................................................................................25V.................................................(GND - 0.3V) to (V+ + 0.3V)
Digital Inputs, VS, VD (Note 1)......(V- - 2V) to (V+ + 2V) or 30mA
(whichever occurs first)
Continuous Current (any terminal)......................................30mA
Peak Current, S or D
(pulsed at 1ms, 10% duty-cycle max).................................100mA
Continuous Power Dissipation (TA= +70°C)
Plastic DIP (derate 10.53mW/°C above +70°C)..........842mW
QFN (derate 19.2mW/°C above +70°C)....................1538mW
Narrow SO (derate 8.70mW/°C above +70°C)............696mW
CERDIP (derate 10.00mW/°C above +70°C)...............800mW
Operating Temperature Ranges
DG441C/DG442C...............................................0°C to +70°C
DG441D, E/DG442D, E...................................-40°C to +85°C
DG441AK/DG442AK.....................................-65°C to +150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10sec).............................+300°C
Note 1:Signals on S, D, or IN exceeding V+ or V- are clamped by internal diodes. Limit forward current to maximum current ratings.
DG441/DG442
Improved, Quad, SPST Analog Switches
DG441/DG442
Improved, Quad, SPST Analog Switches
__________________________________________Typical Operating Characteristics(TA = +25°C, unless otherwise noted.)
Note 2:Typical values are for design aid only,are not guaranteed, and are not subject to production testing. The algebraic con-
vention, 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:On-resistance match between channels and flatness is guaranteed only with bipolar-supply operation. Flatness is defined
as the difference between the maximum and the minimum value of on-resistance as measured at the extremes of the speci-
fied analog range.
Note 5:Leakage parameters IS(OFF), ID(OFF), and ID(ON)are 100% tested at the maximum rated hot temperature and guaranteed
by correlation at +25°C.
Note 6:Off-Isolation Rejection Ratio = 20log (VD/VS), VD= output, VS= input to off switch.
Note 7:Between any two switches.
DG441/DG442
Improved, Quad, SPST Analog Switches
____________________________Typical Operating Characteristics (continued)(TA = +25°C, unless otherwise noted.)
__________Applications Information
Operation with Supply Voltages
Other Than ±15VUsing supply voltages other than ±15V reduces the
analog signal range. The DG441/DG442 switches oper-
ate with ±4.5V to ±20V bipolar supplies or with a +10V
to +30V single supply; connect V- to 0V when operating
with a single supply. Also, all device types can operate
with unbalanced supplies such as +24V and -5V. The
Typical Operating Characteristicsgraphs show typical
on-resistance with ±20V, ±15V, ±10V, and ±5V sup-
plies. (Switching times increase by a factor of two or
more for operation at ±5V.)
Overvoltage ProtectionProper 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, followed by V- and logic
inputs. If power-supply sequencing is not possible, add
two small, external signal diodes in series with supply
pins for overvoltage protection (Figure 1). Adding exter-
nal diodes reduces the analog-signal range to 1V
below V+ and 1V above V-, but low switch resistance
and low leakage characteristics are unaffected. Device
operation is unchanged, and the difference between
V+ and V- should not exceed +44V.
DG441/DG442
Improved, Quad, SPST Analog SwitchesFigure 1. Overvoltage Protection Using External Blocking Diodes
