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19-4705; Rev 1; 4/94
Improved, Quad, SPST Analog Switches
_______________General Description
Maxim's redesigned DG444/DG445 analog switches now feature on-resistance matching (4 max) between switches and guaranteed on-resistance flatness over the signal range (9 max). These low on-resistance switches conduct equally well in either direction. They guarantee low charge injection (10pC max), low power consumption (35W max), 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 +85C). The DG444/DG445 are quad, single-pole/single-throw (SPST) analog switches. The DG444 has 4 normally closed switches and the DG445 has 4 normally open switches. Switching times are less than 250ns for tON and less than 70ns for tOFF. Operation is from a single +10V to +30V supply, or bipolar 4.5V to 20V supplies. Maxim's improved DG444/DG445 continue to be fabricated with a 44V silicon-gate process.
______________________New Features
o o o o o Plug-In Upgrades for Industry-Standard DG444/DG445 Improved rON Match Between Channels (4 max) Guaranteed rFLAT(ON) Over Signal Range (9 max) Improved Charge Injection (10pC max) Improved Off Leakage Current Over Temperature (<5nA at +85C) o Withstand Electrostatic Discharge (2000V min) per Method 3015.7
DG444/DG445
__________________Existing Features
o Low rDS(ON) (85 max) o Single-Supply Operation +10V to +30V Bipolar-Supply Operation 4.5V to 20V o Low Power Consumption (35W max) o Rail-to-Rail Signal Handling o TTL/CMOS-Logic Compatible
______________Ordering Information ________________________Applications
Sample-and-Hold Circuits Test Equipment Heads-Up Displays Guidance and Control Systems Military Radios Communication Systems Battery-Operated Systems PBX, PABX Audio Signal Routing Modems/Faxes
PART DG444CJ DG444DY DG444C/D DG444DJ DG444DY TEMP. RANGE 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C PIN-PACKAGE 16 Plastic DIP 16 Narrow SO Dice* 16 Plastic DIP 16 Narrow SO
Ordering Information continued at end of data sheet. * Contact factory for dice specifications.
_____________________Pin Configurations/Functional Diagrams/Truth Tables
TOP VIEW
IN1 D1 S1 VGND S4 D4 IN4 1 2 3 4 5 6 7 8 16 IN2 15 D2 14 S2 13 V+ IN1 D1 S1 VGND S4 D4 IN4 1 2 3 4 5 6 7 8 16 IN2 15 D2 14 S2 13 V+
DG444
12 V L 11 S3 10 D3 9 IN3
DG445
12 V L 11 S3 10 D3 9 IN3
DIP/SO
DG444 LOGIC SWITCH 0 1 ON OFF
DIP/SO
LOGIC 0 1 DG445 SWITCH OFF ON
SWITCHES SHOWN FOR LOGIC "0" INPUT
________________________________________________________________ Maxim Integrated Products
1
Call toll free 1-800-998-8800 for free samples or literature.
Improved, Quad, SPST Analog Switches DG444/DG445
ABSOLUTE MAXIMUM RATINGS
Voltage Referenced to VV+........................................................................................44V GND ....................................................................................25V VL ....................................................(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 = +70C) 16-Pin Plastic DIP (derate 10.53mW/C above +70C) 842mW 16-Pin Narrow SO (derate 8.70mW/C above +70C) ..696mW Operating Temperature Ranges DG444C/DG445C ................................................0C to +70C DG444D/DG445D .............................................-40C to +85C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10sec) .............................+300C
Note 1: Signals on S, D, or IN exceeding V+ or V- are clamped by internal diodes. Limit forward current to maximum current rating.
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.
ELECTRICAL CHARACTERISTICS--Dual Supplies
(V+ = 15V, V- = -15V, VL = 5V, GND = 0V, VINH = 2.4V, VINL = 0.8V, TA = TMIN to TMAX, unless otherwise noted.) PARAMETER SWITCH Analog Signal Range Drain-Source On-Resistance On-Resistance Match Between Channels (Note 4) VANALOG rDS(ON) (Note 3) V+ = 13.5V, V- = -13.5V, VD = 8.5V, IS = -10mA VD = 10V, IS = -10mA VD = 5V, IS = -10mA V+ = 16.5V, V- = -16.5V, VD = 15.5V, VS = 15.5V V+ = 16.5V, V- = -16.5V, VD = 15.5V, VS = 15.5V V+ = 16.5V, V- = -16.5V, VD = 15.5V, VS = 15.5V TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX -0.50 -5 -0.50 -5 -0.50 -10 0.08 0.01 0.01 -15 50 15 85 100 4 5 9 15 0.50 nA 5 0.50 nA 5 0.50 nA 10 V SYMBOL CONDITIONS MIN TYP (Note 2) MAX UNITS
rDS(ON)
On-Resistance Flatness (Note 4) rFLAT(ON) Source Leakage Current (Note 5) Drain-Off Leakage Current (Note 5) Drain-On Leakage Current (Note 5) INPUT Input Current with Input Voltage High Input Current with Input Voltage Low IINH IINL
IS(OFF)
ID(OFF) ID(ON) or IS(ON)
VIN = 2.4V, all others = 0.8V VIN = 0.8V, all others = 2.4V
-0.5 -0.5
-0.00001 -0.00001
0.5 0.5
A A
2
_______________________________________________________________________________________
Improved, Quad, SPST Analog Switches
ELECTRICAL CHARACTERISTICS--Dual Supplies (continued)
(V+ = 15V, V- = -15V, VL = 5V, GND = 0V, VINH = 2.4V, VINL = 0.8V, TA = TMIN to TMAX, unless otherwise noted.) PARAMETER SUPPLY Power-Supply Range Positive Supply Current V+, VI+ All channels on or off, V+ = 16.5V, V- = -16.5V, VIN = 0V or 5V All channels on or off, V+ = 16.5V, V- = -16.5V, VIN = 0V or 5V All channels on or off, V+ = 16.5V, V- = -16.5V, VIN = 0V or 5V All channels on or off, V+ = 16.5V, V- = -16.5V, VIN = 0V or 5V VS = 10V, Figure 2 DG444, VS = 10V, Figure 2 Turn-Off Time tOFF DG445, VS = 10V, Figure 2 Charge Injection (Note 3) Off-Isolation Rejection Ratio (Note 6) Crosstalk (Note 7) Source-Off Capacitance Drain-Off Capacitance Source-On Capacitance Drain-On Capacitance CS(OFF) CD(OFF) CS(ON) CD(ON) Q OIRR CL = 1nF, VGEN = 0V, RGEN = 0, Figure 3 RL = 50, CL = 5pF, f = 1MHz, Figure 4 RL - 50, CL = 5pF, f = 1MHz, Figure 5 f = 1MHz, Figure 6 f = 1MHz, Figure 6 f = 1MHz, Figure 7 f = 1MHz, Figure 7 TA = +25C TA = +25C TA = +25C TA = +25C TA = +25C TA = +25C TA = +25C TA = +25C 110 5 60 100 4 4 16 16 170 10 ns pC dB dB pF pF pF pF TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = +25C 4.5 -1 -5 -1 -5 -1 -5 -1 -5 150 90 -0.0001 0.001 -0.0001 0.001 20.0 1 A 5 1 A 5 1 A 5 1 A 5 250 120 ns ns V SYMBOL CONDITIONS MIN TYP (Note 2) MAX UNITS
DG444/DG445
Negative Supply Current
I-
Logic Supply Current
IL
Ground Current DYNAMIC Turn-On Time
IGND
tON
_______________________________________________________________________________________
3
Improved, Quad, SPST Analog Switches DG444/DG445
ELECTRICAL CHARACTERISTICS--Single Supply
(V+ = 12V, V- = 0V, VL = 5V, GND = 0V, VINH = 2.4V, VINL = 0.8V, TA = TMIN to TMAX, unless otherwise noted.) PARAMETER SWITCH Analog Signal Range Drain-Source On-Resistance SUPPLY Power-Supply Range Power-Supply Current Negative Supply Current Logic Supply Current Ground Current DYNAMIC Turn-On Time Turn-Off Time Charge Injection (Note 3) tON tOFF Q VS = 8V, Figure 2 VS = 8V, Figure 2 CL = 1nF, VGEN = 0V, RGEN = 0, Figure 3 TA = +25C TA = +25C TA = +25C 300 60 5 400 200 10 ns ns pC V+, VI+ IIL IGND All channels on or off, VIN = 0V or 5V All channels on or off, VIN = 0V or 5V All channels on or off, VIN = 0V or 5V All channels on or off, VIN = 0V or 5V TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX 10.8 -1 -5 -1 -5 -1 -5 -1 -5 0.001 -0.0001 0.001 -0.0001 24.0 1 5 1 5 1 5 1 5 V A A A A VANALOG rDS(ON) (Note 3) V+ = 10.8V, VL = 5.25V, VD = 3V, 8V, IS = -10mA TA = +25C TA = TMIN to TMAX 0 100 12 160 200 V SYMBOL CONDITIONS MIN TYP (Note 2) MAX UNITS
Note 2: Typical values are for design aid only, are not guaranteed and are not subject to production testing. 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: On-resistance match between channels and flatness are 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 specified analog signal range. Note 5: Leakage parameters IS(OFF), ID(OFF), ID(ON), and IS(ON), are100% tested at the maximum rated hot temperature and guaranteed at +25C. Note 6: Off-Isolation Rejection Ratio = 20log (VD/VS), VD = output, VS = input to off switch. Note 7: Between any two switches.
__________________________________________Typical Operating Characteristics
ON LEAKAGE CURRENTS
DG444/5-1
(TA = +25C, unless otherwise noted.)
OFF LEAKAGE CURRENTS
DG444/5-2
SWITCHING THRESHOLD vs. BIPOLAR SUPPLY VOLTAGE
DG444/5-3
2
1
3.5 3.0 2.5 IN HI MIN
1 OFF LEAKAGE (nA) ON LEAKAGE (nA) TA = +125C 0 TA = +85C -1 V+ = 15V V- = -15V -2 -15 -10 -5 0 VS, VD (V) 5 10 15
0.5
TA = +125C
0
VIN (V)
2.0 1.5
-0.5
IN LOW MAX
TA = +85C V+ = 15V V- = -15V -15 -10 -5 5 0 VS, VD (V) 10 15
0.5 0 5 10 15 20 BIPOLAR SUPPLY VOLTAGE (V)
-1
4
_______________________________________________________________________________________
Improved, Quad, SPST Analog Switches
____________________________Typical Operating Characteristics (continued)
(TA = +25C, unless otherwise noted.)
ON-RESISTANCE vs. VD AND UNIPOLAR-SUPPLY VOLTAGE
DG444/5-4
DG444/DG445
ON-RESISTANCE vs. VD AND BIPOLAR-SUPPLY VOLTAGE
DG444/5-5
ON-RESISTANCE vs. VD, BIPOLAR SUPPLY VOLTAGE AND TEMPERATURE
V+ = 15V, V- = -15V
DG444/5-6
150 V+ = 5V 125 V+ = 10V 100 rDS(ON)()
120 5V 90 rDS(ON)()
100
80 TA = +125C TA = +25C TA = -55C 20
V+ = 15V 75 50 25 0 0 5 10 VD (V) 15 20 V+ = 20V
10V 60 15V 30 20V
rDS(ON)() 0 VD (V) 10 20
60
40
0 -20 -10
0 -15
-10
-5
0 VD (V)
5
10
15
ON-RESISTANCE vs. VD, UNIPOLARSUPPLY VOLTAGE AND TEMPERATURE
DG444/5-7
SWITCHING TIME vs. BIPOLAR-SUPPLY VOLTAGE
DG444/5-8
SWITCHING TIME vs. UNIPOLAR-SUPPLY VOLTAGE
V- = 0V 150 TIME (ns)
DG444/5-9
150 TA = +125C 125
160
200
120 100 rDS(ON)() 75 50 40 25 0 0 4 VD (V) 8 12 V+ = 12V V- = 0V tOFF 0 5 10 15 20 BIPOLAR-SUPPLY VOLTAGE (V) TA = +25C TIME (ns) tON 80
TA = -40C
100
tON
50
tOFF
0 10 15 20 UNIPOLAR-SUPPLY VOLTAGE (V) 25
CHARGE INJECTION vs. VD VOLTAGE
DG444/5-10
CHARGE INJECTION vs. VD VOLTAGE
V+ = 12V V- = 0V CL = 1nF
DG444/5-11
20 V+ = 15V V- = -15V CL = 1nF
10
Q (pC)
0
Q (pC) -15 -10 0 VD (V) 10 15
0
-20
-10 0 5 VD (V) 10 15
_______________________________________________________________________________________
5
Improved, Quad, SPST Analog Switches DG444/DG445
_____________________Pin Description
PIN 1, 16, 9, 8 2, 15, 10, 7 3, 14, 11, 6 4 5 12 13 NAME IN1-IN4 D1-D4 S1-S4 VGND VL V+ FUNCTION Logic Control Inputs Drain Outputs Source Outputs Negative Supply-Voltage Input Ground Logic Supply-Voltage Input Positive Supply-Voltage Input-- connected to substrate
Characteristics graphs show typical on-resistance with 20V, 15V, 10V, 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 maximum ratings because stresses beyond the listed ratings may cause permanent damage to the devices. Always sequence V+ on first, followed by VL , 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 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 Vshould not exceed +44V.
V+
__________Applications Information
General Operation
1. Switches are open when power is off. 2. IN, D, and S should not exceed V+ or V-, even with the power off. 3. Switch leakage is from each analog switch terminal to V+ or V-, not to other switch terminals.
Operation with Supply Voltages Other Than 15V
Using supply voltages other than 15V will reduce the analog signal range. The DG444/DG445 switches operate 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. VL must be connected to +5V to be TTL compatible, or to V+ for CMOS-logic level inputs. The Typical Operating
Vg
S
D
V-
Figure 1. Overvoltage Protection Using External Blocking Diodes
______________________________________________Timing Diagrams/Test Circuits
+5V LOGIC INPUT +3V 50% 0V tOFF VOUT 0.8 x VOUT SWITCH OUTPUT 0V tON LOGIC INPUT WAVEFORM IS INVERTED FOR SWITCHES THAT HAVE THE OPPOSITE LOGIC SENSE. REPEAT TEST FOR CHANNELS 2, 3, AND 4. CL INCLUDES FIXTURE AND STRAY CAPACITANCE. RL VOUT = VD RL + rDS(ON) 0.8 x VOUT LOGIC INPUT +3V IN GND VRL CL t f < 20ns t r < 20ns SWITCH INPUT VL D V+ S +15V
DG444 DG445
VOUT
-15V
(
)
Figure 2. Switching Time
6 _______________________________________________________________________________________
Improved, Quad, SPST Analog Switches
_________________________________Timing Diagrams/Test Circuits (continued)
VOUT +5V +15V
DG444/DG445
DG444 DG445
VOUT CL
VOUT IN DG444 OFF ON OFF VGEN
RGEN S
VL
V+ D
GND
IN
V-15V VIN = +3V
OFF IN DG445
ON Q = VOUT x CL
OFF
Figure 3. Charge Injection
10nF
+15V
+5V
DG444 DG445
V+ VL SIGNAL GENERATOR 10dBm
10nF
+15V
+5V
DG444 DG445
S 50
SIGNAL GENERATOR
10dBm
D
D IN
V+
VL
RGEN = 50 IN 0V or +2.4V NETWORK ANALYZER RL -15V S GND V10nF
RGEN = 50 0V or +2.4V IN 0V or +2.4V NETWORK ANALYZER RL -15V S GND VD 10nF NC
Figure 4. Off-Isolation Rejection Ratio
Figure 5. Crosstalk
10nF
+15V
+5V
DG444 DG445
CAPACITANCE METER IN 0V or +2.4V f = 1MHz VD
10nF
+15V
+5V
DG444 DG445
D
V+
VL
D
V+
VL
IN S GND V10nF
CAPACITANCE METER f = 1MHz
0V or +2.4V
S GND V10nF
-15V
-15V
Figure 6. Source/Drain-Off Capacitance
Figure 7. Source/Drain-On Capacitance
7
_______________________________________________________________________________________
Improved, Quad, SPST Analog Switches DG444/DG445
_Ordering Information (continued)
PART DG445CJ DG445CY DG445C/D DG445DJ DG445DY TEMP. RANGE 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C PIN-PACKAGE 16 Plastic DIP 16 Narrow SO Dice* 16 Plastic DIP 16 Narrow SO
VGND V+ 0.091" VL (2.31mm) S2 S1
___________________Chip Topography
D1 IN1 IN2 D2
* Contact factory for dice specifications.
S4 D4
S3
IN4
IN3
D3
0.071" (1.80mm)
TRANSISTOR COUNT: 126 SUBSTRATE CONNECTED TO V+
________________________________________________________Package Information
D1
DIM A A1 A2 A3 B B1 C D D1 E E1 e eA eB L INCHES MAX MIN 0.200 - - 0.015 0.150 0.125 0.080 0.055 0.022 0.016 0.065 0.050 0.012 0.008 0.765 0.745 0.030 0.005 0.325 0.300 0.280 0.240 0.100 BSC 0.300 BSC 0.400 - 0.150 0.115 15 0 MILLIMETERS MIN MAX - 5.08 0.38 - 3.18 3.81 1.40 2.03 0.41 0.56 1.27 1.65 0.20 0.30 18.92 19.43 0.13 0.76 7.62 8.26 6.10 7.11 2.54 BSC 7.62 BSC - 10.16 2.92 3.81 0 15
21-587A
E D A3 A A2 E1
L A1 e B
C B1 eA eB
16-PIN PLASTIC DUAL-IN-LINE PACKAGE
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
8 ___________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 (c) 1994 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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