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DG300A/301A/302A/303A
CMOS Analog Switches
Features
D D D D D D Analog Signal Range: "15 V Fast Switching--tON: 150 ns Low On-Resistance--rDS(on): 30 W Single Supply Operation Latch-up Proof CMOS Compatible
Benefits
D Full Rail-to-Rail Analog Signal Range D Low Signal Error D Low Power Dissipation
Applications
D Low Level Switching Circuits D Programmable Gain Amplifiers D Portable and Battery Powered Systems
Description
The DG300A-DG303A family of monolithic CMOS switches feature three switch configuration options (SPST, SPDT, and DPST) for precision applications in communications, instrumentation and process control, where low leakage switching combined with low power consumption are required. Designed on the Siliconix PLUS-40 CMOS process, these switches are latch-up proof, and are designed to block up to 30 V peak-to-peak when off. An epitaxial layer prevents latchup. In the on condition the switches conduct equally well in both directions (with no offset voltage) and minimize error conditions with their low on-resistance. Featuring low power consumption (3.5 mW typ) these switches are ideal for battery powered applications, without sacrificing switching speed. Designed for break-before-make switching action, these devices are CMOS and quasi TTL compatible. Single supply operation is allowed by connecting the V- rail to 0 V.
Functional Block Diagram and Pin Configuration
DG300A
Dual-In-Line NC D1 NC S1 NC IN1 GND 1 2 3 4 5 6 7 Top View 14 13 12 11 10 9 8 V+ D2 NC S2 NC IN2 V- NC IN1 3 S1 2 D1
DG300A
Metal Can V+ (Substrate and Case) D2 9 8 Top View 4 6 5 GND V- 7 S2
1
10
Truth Table Logic
0 IN2 1
Switch
OFF ON
Logic "0" v 0.8 V 08 0 1 Logic "1" w 4 V
Updates to this data sheet may be obtained via facsimile by calling Siliconix FaxBack, 1-408-970-5600. Please request FaxBack document #70044.
Siliconix S-52880--Rev. C, 28-Apr-97
1
DG300A/301A/302A/303A
Functional Block Diagram and Pin Configuration (Cont'd)
DG301A
Dual-In-Line NC D1 NC S1 NC IN GND 1 2 3 4 5 6 7 Top View 14 13 V+ D2 S1 2 3 4 NC 5 GND Top View 6 V- 8 7 D1 1 10 9 S2 D2
DG301A
Metal Can V+ (Substrate and Case)
Truth Table Logic
0 1
12 NC 11 10 9 8 S2 NC NC V-
SW1
OFF ON
SW2
ON OFF
IN
NC
Logic "0" v 0.8 V Logic "1" w 4 V 1
DG302A
Dual-In-Line NC S3 D3 D1 S1 IN1 GND 1 2 3 4 5 6 7 Top View 14 13 12 11 10 9 8 V+ S4 D4 D2 S2 IN2 V-
Truth Table Logic
0 1
Switch
OFF ON
Logic "0" v 0.8 V Logic "1" w 4 V
DG303A
Dual-In-Line 1 2 3 4 5 6 7 Top View 14 13 12 11 10 9 8
NC S3 D3 D1 S1 IN1 GND
V+ S4 D4 D2 S2 IN2 V-
Truth Table Logic
0 1
SW1, SW2
OFF ON Logic "0" v 0.8 V Logic "1" w 4 V
SW3, SW4
ON OFF
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Siliconix S-52880--Rev. C, 28-Apr-97
DG300A/301A/302A/303A
Ordering Information
Temp Range DG300A
0 to 70_C -25 to 85_C 14-Pin Plastic DIP 14-Pin CerDIP 10-Pin Metal Can DG300ACJ DG300ABK DG300ABA DG300AAK 14-Pin CerDIP -55 to 125_C DG300AAK/883 JM38510/11601BCA 14-Pin Sidebraze 10-Pin Metal Can JM38510/11601BCC DG300AAA/883 JM38510/11601BIA
Package
Part Number
DG301A
0 to 70_C -25 to 85_C 14-Pin Plastic DIP 14-Pin CerDIP 10-Pin Metal Can 14-Pin CerDIP 14-Pin Sidebraze -55 to 125_C 10-Pin Metal Can DG301ACJ DG301ABK DG301ABA DG301AAK/883 JM38510/11602BCA JM38510/11602BCC DG301AAA DG301AAA/883 JM38510/11602BIA
DG302A
0 to 70_C 14-Pin Plastic DIP DG302ACJ DG302AAK 14-Pin CerDIP -55 to 125_C 14-Pin Sidebraze DG302AAK/883 JM38510/11603BCA JM38510/11603BCC
DG303A
0 to 70_C -25 to 85_C -45 to 85_C 14-Pin Plastic DIP 14-Pin CerDIP 14-SOIC DG303ACJ DG303ABK DG303ADY DG303AAK 14-Pin CerDIP -55 to 125_C 14-Pin Sidebraze DG303AAK/883 JM38510/11604BCA JM38510/11604BCC
Siliconix S-52880--Rev. C, 28-Apr-97
3
DG300A/301A/302A/303A
Absolute Maximum Ratings
Voltages Referenced to V- V+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 V GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 V Digital Inputsa, VS, VD . . . . . . . . . . . . . . . . . (V-) -2 V to (V+) +2V or 30 mA, whichever occurs first Current, Any Terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 mA Continuous Current, S or D (Pulsed at 1 ms, 10% duty cycle max) . . . . . . . . . . . . . . . . . . . . 100 mA Storage Temperature (A & B Suffix) . . . . . . . . . . . . -65 to 150_C (C Suffix) . . . . . . . . . . . . . . . . -65 to 125_C Power Dissipationb 14-Pin Plastic DIPc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 470 mW 14-Pin CerDIPd . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 825 mW 10-Pin Metal Cane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 450 mW Notes: a. Signals on SX, DX, or INX exceeding V+ or V- will be clamped by internal diodes. Limit forward diode current to maximum current ratings. b. All leads welded or soldered to PC Board. c. Derate 6.5 mW/_C above 25_C d. Derate 11 mW/_C above 75_C e. Derate 6 mW/_C above 75_C
Schematic Diagram (Typical Channel)
V+
S
V- VIN Level Shift/ Drive V+ GND D
V-
Figure 1.
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Siliconix S-52880--Rev. C, 28-Apr-97
DG300A/301A/302A/303A
Specificationsa
Conditions Unless Otherwise Specified Parameter Analog Switch
Analog Signal Rangee Drain-Source On-Resistance Source Off Leakage Current Drain Off Leakage Current Drain On Leakage Current VANALOG rDS(on) IS(off) VS = "14 V VD = #14 V V, ID(off) ID(on) VD = VS = "14 V VD = "10 V, IS = -10 mA Full Room Full Room Hot Room Hot Room Hot 30 "0.1 "0.1 "0.1 -1 -100 -1 -100 -1 -100 -15 15 50 75 1 100 1 100 1 100 -5 -100 -5 -100 -5 -100 -15 15 50 75 5 100 5 100 5 100 nA V W
A Suffix
-55 to 125_C
B/C Suffix
Symbol
V = 15 V, V- = -15 V VV 15 V+ VIN = 0.8 V or VIN = 4 Vf
Tempb
Typc
Mind Maxd Mind Maxd
Unit
Digital Control
Input Current with p Input V l I Voltage Hi h High Input Current with Input Voltage Low VIN = 5 V IINH VIN = 15 V IINL VIN = 0 V Room Full Room Full Room Full -0.001 0.001 -0.001 -1 -1 -1 -1 1 1 -1 -1 1 mA
Dynamic Characteristics
Turn-On Time Turn-Off Time Break-Before-Make Time Charge Injection Source-Off Capacitance Drain-Off Capacitance Channel-On Capacitance Input Capacitance Off-Isolation Crosstalk (Channel-to-Channel) tON tOFF tOPEN Q CS(off) CD(off) CD(on) Cin OIRR XTALK f = 1 MHz VIN = 0 V VIN = 15 V VS, VD = 0 V, f = 1 MHz See Figure 2 DG301A/303A Only Figure 3 CL = 1 nF, Rgen = 0 W Vgen = 0 V, Figure 4 Room Room Room Room Room Room Room Room Room Room Room 150 130 50 8 14 14 40 6 7 62 74 dB pF pC 300 250 ns
VIN = 0 V, RL = 1 kW , VS = 1 Vrms, f = 500 kHz kH
Power Supplies
Positive Supply Current Negative Supply Current Positive Supply Current Negative Supply Current I+ I- I+ VIN = 0.8 V (All Inputs) 08 I- VIN = 4 V (One Input) ( p) All O h = 0 V Others Room Full Room Full Room Full Room Full 0.23 -0.001 0.001 -0.001 -10 -100 -10 -100 10 100 -100 0.5 1 -100 100 mA 1 mA
Notes: a. Refer to PROCESS OPTION FLOWCHART. b. Room = 25_C, Full = as determined by the operating temperature suffix. c. Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing. d. The algebraic convention whereby the most negative value is a minimum and the most positive a maximum, is used in this data sheet. e. Guaranteed by design, not subject to production test. f. VIN = input voltage to perform proper function.
Siliconix S-52880--Rev. C, 28-Apr-97
5
DG300A/301A/302A/303A
Typical Characteristics
rDS(on) vs. VD and Power Supply
rDS(on) - Drain-Source On-Resistance ( W ) rDS(on) - Drain-Source On-Resistance ( W ) 90 TA = 25C 70 "5 V 60
rDS(on) vs. VD and Temperature
V+ = 15 V V- = -15 V
50
40 TA = 125_C 30 TA = 25_C 20 TA = -55_C 10 -15 -10 -5 0 5 10 15
50
"8 V "10 V
30
"12 V "15 V "20 V
10
-25
-15
-5
5
15
25
VD - Drain Voltage (V)
VD - Drain Voltage (V)
rDS(on) vs. VD and Power Supply Voltage
rDS(on) - Drain-Source On-Resistance ( W ) 100 7.5 V 80 t ON , t OFF (ns) 10 V 60 15 V 40 20 V 100 300 V- = 0 V TA = 25C 500
Switching Time and Break-Before-Make Time vs. Positive Supply Voltage
V- = -15 V TA = 25_C VINH = 4 V VINL = 0 V tOFF
400
200
tON tOPEN DG301/303 Only
20 0 5 10 VD - Drain Voltage (V) 15 20
0 0 5 10 15 V+ - Positive Supply (V)
Charge Injection vs. Analog Voltage
50 V+ = 15 V V- = -15 V CL = 1 nF VT (V)
5
Input Switching Threshold vs. Positive Supply Voltage
V- = -15 V TA = 25_C
40
4
Q (pC)
30
3
20
2
10
1
0 -15
-10
-5
0
5
10
15
0
5
10
15
VS - Source Voltage (V)
V+ - Positive Supply (V)
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Siliconix S-52880--Rev. C, 28-Apr-97
DG300A/301A/302A/303A
Typical Characteristics (Cont'd)
Supply Current vs. Temperature
500 400 300 I+, I- (mA) 200 100 V+ = 15 V V- = -15 V VIN = 4 V (One Input) (All Other = 0 V) I- 0 -100 -55 -35 -15 -20 10 k -120
Off Isolation and Crosstalk vs. Frequency
-100 I+ -80 (dB) Off Isolation -60 V+ = +15 V V- = -15 V RL= 50 W
Crosstalk
-40
5
25
45
65
85
105 125
100 k
1M
10 M
Temperature (_C)
f - Frequency (Hz)
Supply Curents vs. Switching Frequency
15 V+ = 15 V V- = -15 V 10 nA 10 I+, I- (mA) IS , I D 1 nA 100 nA
Leakage vs. Temperature
V+ = 15 V V- = -15 V VS, VD = "14 V
ID(on)
5 +I -I 0 1k 10 k 100 k 1M f - Frequency (Hz) 10 pA -55 -35 -15 5 25 45 65 85 105 125 100 pA ID(off) or IS(off)
Temperature (_C)
Switching Time vs. Power Supply Voltage
400 350 300 Time (ns) Time (ns) 250 200 150 100 50 0 "10 "12 "14 "16 "18 "20 "22 tON tOFF V+ = 15 V V- = -15 V 400 350 300 250 200 150 100 50
Switching Time vs. Temperature
V+ = 15 V V- = -15 V VS = 3 V
tON
tOFF
0 -55 -35 -15
5
25
45
65
85
105 125
Supply Voltage (V)
Temperature (_C)
Siliconix S-52880--Rev. C, 28-Apr-97
7
DG300A/301A/302A/303A
Test Circuits
+15 V Logic "1" = Switch On V+ VS = 3 V S IN 5V GND V- RL 300 W CL 33 pF VS Switch Output 0V -15 V CL (includes fixture and stray capacitance) VO = VS RL RL + rDS(on) tON tOFF 90% 10% D VO Logic Input 0V 50%
Figure 2. Switching Time
+15 V Logic Input D1 D2 VO2 VO1 Switch Output RL1 CL1 300 W 33 pF RL2 CL2 300 W 33 pF 0V VS1 0V VS2 VO1 50% Logic "1" = Switch On VINH 50%
V+ VS1 = 3 V VS2 = 3 V S1 S2 IN GND V-
VO2 Switch Output 0 V
50% tBBM
-15 V CL (includes fixture and stray capacitance)
Figure 3. Break-Before-Make SPDT (DG301A, DG303A)
+15 V
Rg
V+ S IN D CL 1 nF V- VO VO INX ON
DVO
Vg 3V
GND
OFF
ON
-15 V
Figure 4. Charge Injection
8
Siliconix S-52880--Rev. C, 28-Apr-97
DG300A/301A/302A/303A
Application Hintsa
VIN Logic Input Voltage VINH(min)/VINL(max) (V)
4/0.8 4/0.8 4/0.8
V+ Positive Supply Voltage (V)
15 20 15
V- Negative Supply Voltage (V)
-15 -20 0
GND Voltage (V)
0 0 0
VS or VD Analog Voltage Range (V)
-15 to 15 -20 to 20 0 to 15
Note: a. Application Hints are for DESIGN AID ONLY, not guaranteed and not subject to production testing.
Applications
The DG300A series of analog switches will switch positive analog signals while using a single positive supply. This facilitates their use in applications where only one supply is available. The trade-offs of using single supplies are: 1) Increased rDS(on); 2) slower switching speed. The analog voltage should not go above or below the supply voltages which in single operation are V+ and 0 V. (See Input Switching Threshold vs. Positive Supply Voltage Curve.)
+15 V 50 kW 10 kW 5 kW VOUT 10 mF +15 V +15 V
DG301A
100 kW 5 kW
+5 V
TTL Input
10 kW
Figure 5. Single Supply Op Amp Switching
Siliconix S-52880--Rev. C, 28-Apr-97
9
DG300A/301A/302A/303A
Applications (Cont'd)
+15 V -15 V +15 V
CMOS Logic Input Select High = Diff. IN B
Diff. IN A -15 V +15 V
+ - R2 75 kW
R4 75 kW R6 75 kW
Diff. IN B R1 16 kW Ri1 1.5 kW DG301A GND CMOS Logic Gain Select High = AV = 101 R2 75 kW R5 75 kW Voltage gain of the instrumentation amplifier is: AV = 1 + 2R2 R1 (In the circuit shown, AV1 = 10.4, AV2 = 101) -15 V R7 67 kW VOUT
DG302A
+15 V VOSNULL 50 kW
Figure 6. Low Power Instrumentation Amplifier with Digitally Selectable Inputs and Gain
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Siliconix S-52880--Rev. C, 28-Apr-97

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