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CORPORATION
CMOS/DMOS Quad Monolithic SPST Wide Band Analog Switches
CWB308 / CWB309
FEATURES
* Low Insertion Loss . . . . . . . . . . . . . 0.9 x DC @ 100MHz * Low Channel-to-Channel Crosstalk. . . . . . . . . . . . -80dB OFF Isolation 10MHz * High Switching . . . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . 68dB. @<140ns .... . * Fast * Low ON Resistance . . . . . . . . . . . . . . . . . . . . . . 40 (typ) * High Speed Multiplexing * RF & Video Switches * Sample and Hold Switches * Track and Hold Switches * Computer Peripherals
DESCRIPTION The Calogic CWB308 and CWB309 feature fast switching (<140ns) and low ON resistance (<40) for excellent performance in applications in communications, computer peripherals and instrument controls. This series combines low power CMOS input logic and level translation circuitry with high speed, low capacitance DMOS switches in a monolithic structure. The CWB308 and CWB309 have CMOS compatible inputs and also have a standard pin configuration for second sourcing. ORDERING INFORMATION Part CWB308CP CWB308CY XCWB308 CWB309CP CWB309CY XCWB309 Package Temperature Range 0 to +85oC 0 to +85oC 0 to +85oC 0 to +85oC 0 to +85oC 0 to +85oC Plastic 16-Pin Dip Plastic SO-16 Surface Mount Sorted Chips in Carriers Plastic 16-Pin Dip Plastic SO-16 Surface Mount Sorted Chips in Carriers
APPLICATIONS
PIN CONFIGURATION
SO-16 IN1 D1 S1 VGND S4 D4 IN4 1 2 3 4 5 6 7 8 TOP VIEW CWB308CY CWB309CY 16 IN2 15 D2 14 S2 13 V+ 12 N/C 11 S3 10 D3 9 IN3 IN1 D1 S1 VGND S4 D4 IN4 1 2 3 4 5 6 7 8 TOP VIEW CWB308CP CWB309CP 16-PIN DIP 16 IN2 15 D2 14 S2 13 V+ 12 N/C 11 S3 10 D3
FUNCTIONAL BLOCK DIAGRAMS
CWB308 S1 IN 1 D1 S2 IN 1 D1 S2 CWB309 S1
IN 2
D2 S3 IN 3 D3 S4 IN 4
IN 2
D2 S3 IN 3 D3 S4 IN 4 D4 D4
9
IN3
CWB LOGIC TABLE
Logic 0 1 CWB308 OFF ON CWB309 ON OFF
Four SPST Switches per Package. Switches shown in Logic '1' Input Position.
All devices contain diodes to protect inputs against damage due to high static voltages or electric fields; however, it is advised that precautions be taken not to exceed the maximum recommended input voltages. All unused inputs must be connected to an appropriate logic level (either Vcc or GND).
CWB308 / CWB309
CORPORATION
ABSOLUTE MAXIMUM RATINGS VV+ VIN IL IS IS TJ TS PD Negative Supply Voltage . . . . . . . . . . . . . . . . . . . . -20V Positive Supply Voltage . . . . . . . . . . . . . . . . . . . . . +20V Control Input Voltage Range . . . . . . . . . . . . . . V+ +0.3V V- -0.3V Continuous Current, any Pin except S or D. . . . . . 20mA Continuous Current, S or D . . . . . . . . . . . . . . . . . . 30mA Peak Pulsed Current, S or D, 80sec, 1%, Duty Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180mA Junction Temperature Range. . . . . . . . . . -55 to +125oC Storage Temperature Range . . . . . . . . . . -55 to +125oC Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . 500mW
RECOMMENDED OPERATING CONDITIONS VV+ VIN VS TOP Negative Supply Voltage . . . . . . . . . . . . . . . -8.0 to -15V Positive Supply Voltage . . . . . . . . . . . . . . . +8.0 to +15V Control Input Voltage Range . . . . . . . . . . . . . . 0 to +5V Analog Switch Voltage Range . . . . . . . . . . . -10 to +10V Operating Temperature . . . . . . . . . . . . . . . . 0 to +85oC
ELECTRICAL CHARACTERISTICS (V- = -15V, V+ = +15V unless otherwise noted, TA = +25oC)
SYMBOL STATIC VANALOG Analog Signal Range -10 40 rDS(ON) Switch ON Resistance 45 100 VIH VIL IIN ID(OFF) IS(OFF) II+ DYNAMIC tON tOFF OIRR CCRR Cd Cs Switch Turn-ON Time Switch Turn-OFF Time Off Isolation Rejection Ratio Cross-Coupling Rejection Ratio Drain-Node Capacitance Source-Node Capacitance 60 140 80 62 80 0.3 pF 3.0 250 220 dB nSec VIN = 1.0V CWB308 VIN = 5.0V CWB309 f = 10MHz, RL = 50 f = 10MHz, RL = 50 VIN = 1.0V CGWB308 VIN = 5.0V CWB309 VD = VS = 0, f = 1MHz Negative Supply Quiescent Current Positive Supply Quiescent Current High Level Input Voltage Low Level Input Voltage Logic Input Leakage Current 0.01 0.02 Switch OFF Leakage Current 0.2 0.4 -0.1 0.1 4.5 3.4 1.0 0.1 0.1 5.0 5.0 -0.5 0.5 A A VIN = +5.0V VIN = +15V VD = +10V, VS = -10V VS = +10V, VD = -10V CWB309 VIN = 5.0V CWB308 VIN = 1.0V +10 80 80 160 V ohms V VS = -10V VS = +2.0V VS = +10V PARAMETER MIN TYP MAX UNITS TEST CONDITIONS
nA
CWB308 / CWB309
CORPORATION
ELECTRICAL CHARACTERISTICS (V- = -15V, V+ = +15V unless otherwise noted) LIMITS AT TEMPERATURE EXTREMES
MAXIMUM @ TA = SYMBOL PARAMETER +85oC STATIC VANALOG Analog Signal Range 10 120 rDS(ON) Switch ON Resistance 120 240 IIN ID(OFF) IS(OFF) II+ Logic Input Leakage Current Switch OFF Leakage Current Supply Quiescent Current 1.0 2.0 100 nA 100 -20 20 A VS = +10V, VD = -10V A ohms V VS = -10V VS = +2.0V VS = +10V VIN = +5.0V VIN = +15V VD = +10V, VS = -10V UNITS TEST CONDITIONS
TEST WAVE FORMS
3.0V LOGIC INPUT t RISE < 6nSEC t FALL < 4nSEC
50%
0 (VS ) SWITCH INPUT
V0 SWITCH OUTPUT 0 V0 =
0.9
(R
RL
L
tON
+ r DS(ON) VS
)
t OFF
CWB308 / CWB309
CORPORATION
FUNCTIONAL BLOCK DIAGRAMS (1 of 4 channels)
V+
Switch Contacts: Switches are bi-directional (Analog Input can be to Source or Drain. However, for optimum performance in Video Application, connect Input to Source and Output to Drain.
S D
IN
IL
LT
GND CMOS CIRCUITRY
VDMOS SWITCH
SWITCHING TIMES TEST CIRCUIT
+15V
SWICHING TIMES -VSSUPPLY VOLTAGES 300 TA = +25 oC t on 200
SWITCH INPUT +3V LOGIC INPUT RL = 1K
SWITCH OUTPUT
C L = 35pF
Switching Time (nSec)
t off 100
-15V
0 +5 _ +10 _ +15 _ Supply Voltages (Volts)
OFF ISOLATION TEST CIRCUIT
V+ C
KROHNHITE 240D (or equivalent)
D
OIRR - OFF Isolation Rejection Ratio (db)
OFF ISOLATION REJECTION RATIO -VSFREQUENCY 60 55 50 45 40 35 V-, V+ = _ +15V R L = 50
50 LOGIC 1 = +5V PHILIPS SCOPE A S
B PM3214 (or equivalent)
50 C OFF-ISOLATION
C = 0.22 F // 10 F V-
TA = +25 oC 20 30 40 50 60 70 80 90 100
f - Frequency (MHz
CWB308 / CWB309
CORPORATION
SWITCH ON RESISTANCE
SWITCH ON RESISTANCE -VSANALOG VOLTAGE V-, V+ = _ +15V R L = 50 TA = +25 oC
r DS(on) Switch ON Resistance (Ohms) -
140 120 100 80 60 40 20 0 -10 -5.0 0 +5.0 +10 V S - Source Voltage (Volts)
SWITCH ON RESISTANCE -VSSUPPLY VOLTAGES 65 60 R L = 50 Vanalog = 100mVrms f = 1KHz TA = +25 oC
r DS(on)- Switch ON Resistance (Ohms)
55 50 45 _ +5.0
_ +6.0
_ +8.0
_ +10
_ +12
_ +15
V-, V+ - Supply Voltages (Volts)
SWITCH ON RESISTANCE -VS- FREQUENCY TEST CIRCUIT
V+ C
HP TRACKING GENERATOR (or equivalent)
D
50 LOGIC 1 = +5V HP SPECTRUM ANALYSER (or equivalent)
S
50 C ON-RESISTANCE
C = 0.22 F // 10 F V-
20MHz to 100MHz
r DS(on) - Switch ON Resistance (Ohms)
SWITCH ON RESISTANCE -VSFREQUENCY 65 V-, V+ = _ +8.0V _ 60 V-, V+ = +10V V-, V+ = +12V _ 55 V-, V+ = +15V _ R L = 50 Vanalog = 100mVrms 50 20 40
Switch ON Resistance ( /V)
.55 .50 .45 .40 .35 .30 20
SWITCH ON RESISTANCE -VSSUPPLY VOLTAGES AND FREQUENCY V-, V+ = +10V _
R L = 50 Vanalog = 100mVrms V-, V+ = +12V _
TA = +25 oC
TA = +25 oC 60 80 100
40
60
80
100
f - Frequency (MHz)
f - Frequency (MHz)
CWB308 / CWB309
CORPORATION
DISTORTION -VS- FREQUENCY
V+ C
Total Harmonic Distortion (%)
0.80 0.50 0.20 0.10
TOTAL HARMONIC DISTORTION -VSFREQUENCY V-, V+ = +10V Vanalog = 1.0Vrms _ V-, V+ = +15V Vanalog = 1.0Vrms _ V-, V+ = +15V Vanalog = 0.3Vrms _
HP GENERATOR (or equivalent)
D
50 LOGIC 1 = +5V HP SPECTRUM ANALYSER (or equivalent)
S
TA = +25 oC 0.05 10 20 f - Frequency (MHz) 40
50 C HARMONIC DISTORTION
C = 0.22 F // 10 F V-
10MHz - 40MHz
DISTORTION -VSANALOG INPUT VOLTAGE 10.0 5.0 V- = -15V, V+ = +15V f = 10KHz, R L = 50 Total Harmonic TA = +25 oC
Distortion (%)
2.0 1.0 0.3 0.1 0.05 0.02
Compensated
0.3
1.0 Vanalog - Analog Input (Vrms)
3.0
5.0
POWER SUPPLY REJECTION RATIO POWER SUPPLY DECOUPLING CIRCUIT
.22 F 1K V+
POWER SUPPLY REJECTION RATIO -VSFREQUENCY 90 -PSRR, +PSRR with Decoupling
PSRR - Power Supply Rejection Ratio (dB)
80 70 60 V- = 15V, V+ = +15V 50 40 VMOD = 4.0V -f-p +PSRR -PSRR w/o Decoupling
IN
IL
LT S D
.22 F
1K V-
CWB309CP TA = +25 oC 30 0.1 0.2 0.5 1.0
2.0
5.0
10.0
20
f - Frequency (MHz)
By inserting 1K ohm resistors in series with V+ and Vpower supply lines and decoupling both pins at the device socket, it is possible to improve power supply rejection ratios of a video switch by 50dB at frequencies of 20MHz and higher.
CWB308 / CWB309
CORPORATION
APPLICATIONS
LOW DISTORTION, RAIL-TO-RAIL ANALOG SWITCH Features very low distortion for low frequency and large signal applications. VERY LOW DISTORTION CIRCUIT FOR LOW FREQUENCY AND LARGE SIGNAL APPLICATIONS This circuit provides very low distortion ( <0.1%) and high off isolation ( >90 dB) at signal levels equal to the supply voltage. The signal passes through a T switch configuration and at the same time is modulating the power supply. This modulation maintains a constant on resistance rDS(on) which in turn reduces the distortion. R5 is for bypassing the power supply and has a typical value of 1K ohm, R4 should be a value that can be accommadated by the signal source as load, R3 is only necessary at loads lower than 100 ohms and should be selected during the initial design of the circuit, C1 has to be large enough for the lowest signal to pass and C2 will have to bypass all signals. R1 and R2 set up the one logic level for the control input and should be set to 5 volts.
C1
R3
R4
R5 +V C2
R1 ANALOG IN
V+
ANALOG OUT R6
R2
V-V
LOGIC INVERTER
V+
R1 ANALOG IN ANALOG OUT
This circuit provides logic inversion with two resistors and one switch. It does not require additional logic parts. The resistors divide the supply voltage down to a 5 volt level when high and are switched to a low level via the switch. This configuration allows a single pole, single throw switch to be changed into a single pole, double throw switch.
5V
R2

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