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DG300B/301B/302B/303B
Vishay Siliconix
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 DG300B-DG303B 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. 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.
Designed on the Vishay 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.
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
DG300B
Plastic DIP 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-
TRUTH TABLE
Logic
0 1 Logic "0" v 0.8 V Logic "1" w 4 V
Switch
OFF ON
Document Number: 71402 S-02968--Rev. A, 22-Jan-01
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DG300B/301B/302B/303B
Vishay Siliconix
FUNCTIONAL BLOCK DIAGRAM AND PIN CONFIGURATION
DG301B
Plastic DIP
NC D1 NC S1 NC IN GND
1 2 3 4 5 6 7 Top View
14 13
V+ D2
TRUTH TABLE
Logic
0 1
12 NC 11 10 9 8 S2 NC NC V-
SW1
OFF ON
SW2
ON OFF
Logic "0" v 0.8 V Logic "1" w 4 V
DG302B
Plastic DIP
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 Logic "0" v 0.8 V Logic "1" w 4 V
Switch
OFF ON
DG303B
Plastic DIP and SOIC
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
SW1, SW2 SW3, SW4
OFF ON Logic "0" v 0.8 V Logic "1" w 4 V ON OFF
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Document Number: 71402 S-02968--Rev. A, 22-Jan-01
DG300B/301B/302B/303B
Vishay Siliconix
ORDERING INFORMATION
Temp Range DG300B
-40 to 85_C 14-Pin Plastic DIP DG300BDJ
Package
Part Number
DG301B
-40 to 85_C 14-Pin Plastic DIP DG301BDJ
DG302B
-40 to 85_C 14-Pin Plastic DIP DG302BDJ
DG303B
-40 to 85_C _ 14-Pin Plastic DIP 14-SOIC DG303BDJ DG303BDY
ABSOLUTE MAXIMUM RATINGS
Voltages Referenced to V- V+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 V GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 V Digital InputsNO TAG, 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65 to 150_C Power DissipationNO TAG 14-Pin Plastic DIPNO TAG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 470 mW SOIC-14d . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 600 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 7.6 mW/_C above 75_C
SCHEMATIC DIAGRAM (TYPICAL CHANNEL)
V+
S
V- VIN Level Shift/ Drive V+ GND D
V-
FIGURE 1.
Document Number: 71402 S-02968--Rev. A, 22-Jan-01
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DG300B/301B/302B/303B
Vishay Siliconix
SPECIFICATIONSa
Test Conditions Unless 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 " # ID(off) ID(on) VD = VS = "14 V VD = "10 V, IS = -10 mA Full Room Full Room Hot Room Hot Room Hot -5 -100 -5 -100 -5 -100 -15 30 "0.1 "0.1 "0.1 15 50 75 5 100 5 100 5 100 nA V W
Limits
-40 to 85_C
Symbol
V+ = 15 V, V- = -15 V VIN = 0.8 V or VIN = 4 Vf
Tempb Mind
Typc
Maxd
Unit
Digital Control
Input Current with Input Voltage High Input Current with Input Voltage Low VIN = 5 V IINH VIN = 15 V IINL VIN = 0 V Room Full Room Full Room Full -1 -1 -0.001 0.001 -0.001 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 Room See Figure NO TAG DG301B/303B Only Figure NO TAG CL = 1 nF, Rgen = 0 W Vgen = 0 V, Figure NO TAG Room Room Room Room Room Room Room Room Room Room 150 130 50 8 14 14 40 6 7 62 74 dB pF pC ns
VIN = 0 V, RL = 1 kW VS = 1 Vrms, f = 500 kHz
Power Supplies
Positive Supply Current Negative Supply Current Positive Supply Current Negative Supply Current I+ I- I+ VIN = 0.8 V (All Inputs) I- VIN = 4 V (One Input) All Others = 0 V Room Full Room Full Room Full Room Full -100 -100 0.23 -0.001 0.001 -0.001 100 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.
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Document Number: 71402 S-02968--Rev. A, 22-Jan-01
DG300B/301B/302B/303B
Vishay Siliconix
TYPICAL CHARACTERISTICS (25_C UNLESS NOTED)
rDS(on) vs. VD and Power Supply
90 r DS(on) Drain-Source On-Resistance ( W ) - r DS(on) Drain-Source On-Resistance ( W ) - TA = 25_C 70 "5 V 60 V+ = 15 V V- = -15 V 50
rDS(on) vs. VD and Temperature
40 TA = 125_C 30 TA = 25_C 20 TA = -55_C 10 -15 -10 -5 0 5 10 15 VD - Drain Voltage (V)
50
"8 V "10 V
30
"12 V "15 V "20 V
10
-25
-15
-5
5
15
25
VD - Drain Voltage (V)
rDS(on) vs. VD and Power Supply Voltage
W) 100 7.5 V V- = 0 V TA = 25_C 500
Switching Time and Break-Before-Make Time vs. Positive Supply Voltage
V- = -15 V TA = 25_C VINH = 4 V VINL = 0 V
r DS(on) Drain-Source On-Resistance ( -
400 80 t ON t OFF (ns) , 10 V 60 15 V 40 20 V 100 tOPEN DG301B/303B Only 20 0 5 10 VD - Drain Voltage (V) 15 20 0 0 5 300 tOFF
200
tON
10
15
V+ - Positive Supply (V)
Charge Injection vs. Analog Voltage
50 V+ = 15 V V- = -15 V CL = 1 nF 5
Input Switching Threshold vs. Positive Supply Voltage
V- = -15 V TA = 25_C 4
40
30 V T (V) 20 Q (pC)
3
2
10
1
0 -15
-10
-5
0
5
10
15
0
5
10
15
VS - Source Voltage (V) Document Number: 71402 S-02968--Rev. A, 22-Jan-01
V+ - Positive Supply (V)
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DG300B/301B/302B/303B
Vishay Siliconix
TYPICAL CHARACTERISTICS (25_C UNLESS NOTED)
Supply Current vs. Temperature
500 -120
Off Isolation and Crosstalk vs. Frequency
400
-100 I+ -80 V+ = 15 V V- = -15 V VIN = 4 V (One Input) (All Other = 0 V) I- (dB)
Crosstalk
300 I+, I- ( mA)
200
Off Isolation -60 V+ = +15 V V- = -15 V RL= 50 W
100
-40
0 -100 -55 -20 10 k
-35
-15
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) I S, 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 -35 100 pA ID(off) or IS(off)
-15
5
25
45
65
85
105
125
Temperature (_C)
Switching Time vs. Power Supply Voltage
400 350 300 250 Time (ns) 200 150 100 50 0 "10 tON tOFF Time (ns) 400 350 300 250 200 150 100 50 0 -55
Switching Time vs. Temperature
V+ = 15 V V- = -15 V VS = 3 V tON
tOFF
"12
"14
"16
"18
"20
"22
-35
-15
5
25
45
65
85
105
125
Supply Voltage (V)
Temperature (_C)
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Document Number: 71402 S-02968--Rev. A, 22-Jan-01
DG300B/301B/302B/303B
Vishay Siliconix
TEST CIRCUITS
+15 V Logic "1" = Switch On V+ VS = 3 V S IN 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%
5V
FIGURE 2. Switching Time
+15 V Logic Input D1 D2 VO2 VO1 Switch Output RL1 300 W RL2 300 W CL2 33 pF CL1 33 pF 0V VS1 VO1 0V VS2 Switch Output 0 V VO2 50% 50% Logic "1" = Switch On VINH 50%
V+ VS1 = 3 V VS2 = 3 V S1 S2 IN GND V-
-15 V CL (includes fixture and stray capacitance)
tBBM
FIGURE 3. Break-Before-Make SPDT (DG301B, DG303B)
+15 V
Rg
V+ S IN D CL 1 nF V- VO VO
DVO
Vg 3V
INX ON OFF ON
GND
-15 V
FIGURE 4. Charge Injection
Document Number: 71402 S-02968--Rev. A, 22-Jan-01
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DG300B/301B/302B/303B
Vishay Siliconix
APPLICATION HINTSNO TAG
V+ Positive Supply Voltage (V)
15 20 15
V- Negative Supply Voltage (V)
-15 -20 0
GND Voltage (V)
0 0 0
VIN Logic Input Voltage VINH(min)/VINL(max) (V)
4/0.8 4/0.8 4/0.8
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 DG300B 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
+15 V
VOUT 10 mF +15 V
DG301B
100 kW 5 kW
+5 V
TTL Input
10 kW
FIGURE 5. Single Supply Op Amp Switching
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Document Number: 71402 S-02968--Rev. A, 22-Jan-01
DG300B/301B/302B/303B
Vishay Siliconix
+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 VOUT R2 75 kW
DG302B
R1 16 kW
Ri1 1.5 kW
DG301B
GND
+15 V VOSNULL R5 75 kW R7 50 kW 67 kW
CMOS Logic Gain Select High = AV = 101
Voltage gain of the instrumentation amplifier is: AV = 1 + 2R2 R1 (In the circuit shown, AV1 = 10.4, AV2 = 101) -15 V
FIGURE 6. Low Power Instrumentation Amplifier with Digitally Selectable Inputs and Gain
Document Number: 71402 S-02968--Rev. A, 22-Jan-01
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