CALOGIC XCWB309

CMOS/DMOS
Quad Monolithic SPST
Wide Band Analog Switches
CORPORATION
CWB308 / CWB309
FEATURES
DESCRIPTION
• Low Insertion Loss . . . . . . . . . . . . . 0.9 x DC @ 100MHz
• Low Channel-to-Channel Crosstalk. . . . . . . . . . . . -80dB
OFF Isolation . . . . . . . . . . . . . . . . . 68dB @ 10MHz
• High
• Fast Switching . . . . . . . . . . . . . . . . . . . . . . . . . . . <140ns
• Low ON Resistance . . . . . . . . . . . . . . . . . . . . . . 40Ω (typ)
The Calogic CWB308 and CWB309 feature fast switching
(<140ns) and low ON resistance (<40Ω) 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.
APPLICATIONS
• High Speed Multiplexing
& Video Switches
• RF
• Sample and Hold Switches
and Hold Switches
• Track
• Computer Peripherals
ORDERING INFORMATION
PIN CONFIGURATION
Part
Package
CWB308CP
CWB308CY
XCWB308
CWB309CP
CWB309CY
XCWB309
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
Temperature Range
0 to +85oC
0 to +85oC
0 to +85oC
0 to +85oC
0 to +85oC
0 to +85oC
FUNCTIONAL BLOCK DIAGRAMS
SO-16
CWB308
16-PIN DIP
IN1
1
16 IN2
IN1
1
16 IN2
D1
2
15 D2
D1
2
15 D2
S1
3
14 S2
S1
3
14 S2
V-
4
13 V+
V-
4
13 V+
GND
5
12 N/C
GND
5
12 N/C
S4
6
11 S3
S4
6
11 S3
D4
7
10 D3
D4
7
10 D3
IN4
8
9
IN4
8
9
CWB309
S1
IN 1
D1
S2
IN 2
TOP VIEW
TOP VIEW
CWB308CY
CWB309CY
CWB308CP
CWB309CP
CWB
IN3
D1
S2
IN 2
D2
S3
IN 3
D2
S3
IN 3
D3
S4
IN 4
IN3
S1
IN 1
D3
S4
IN 4
D4
Four SPST Switches per Package.
Switches shown in Logic '1' Input Position.
LOGIC TABLE
Logic
CWB308
CWB309
0
OFF
ON
1
ON
OFF
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).
D4
CWB308 / CWB309
CORPORATION
ABSOLUTE MAXIMUM RATINGS
RECOMMENDED OPERATING CONDITIONS
VV+
VIN
VV+
VIN
VS
TOP
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, 80µsec, 1%,
Duty Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180mA
Junction Temperature Range. . . . . . . . . . -55 to +125oC
Storage Temperature Range . . . . . . . . . . -55 to +125oC
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . 500mW
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
PARAMETER
MIN
TYP
MAX
UNITS
+10
V
TEST CONDITIONS
STATIC
VANALOG
Analog Signal Range
-10
40
rDS(ON)
Switch ON Resistance
VIH
High Level Input Voltage
VIL
Low Level Input Voltage
IIN
Logic Input Leakage Current
ID(OFF)
4.5
80
45
80
100
160
3.4
VS = -10V
ohms
VS = +2.0V
VS = +10V
V
1.0
Switch OFF Leakage Current
IS(OFF)
0.01
0.1
0.02
0.1
0.2
5.0
0.4
5.0
I-
Negative Supply Quiescent Current
-0.1
-0.5
I+
Positive Supply Quiescent Current
0.1
0.5
tON
Switch Turn-ON Time
140
250
tOFF
Switch Turn-OFF Time
80
220
µA
nA
VIN = +5.0V
VIN = +15V
VD = +10V, VS = -10V
VS = +10V, VD = -10V
µA
DYNAMIC
OIRR
Off Isolation Rejection Ratio
CCRR
Cross-Coupling Rejection Ratio
60
80
62
Cd
Drain-Node Capacitance
0.3
nSec
dB
Source-Node Capacitance
3.0
f = 10MHz, RL = 50Ω
f = 10MHz, RL = 50Ω
pF
Cs
VIN = 1.0V CWB308
VIN = 5.0V CWB309
VIN = 1.0V CGWB308
VIN = 5.0V CWB309
VD = VS = 0, f = 1MHz
CWB309
VIN = 5.0V
CWB308
VIN = 1.0V
CWB308 / CWB309
CORPORATION
ELECTRICAL CHARACTERISTICS (V- = -15V, V+ = +15V unless otherwise noted)
LIMITS AT TEMPERATURE EXTREMES
MAXIMUM @ TA =
SYMBOL
PARAMETER
UNITS
TEST CONDITIONS
+85oC
STATIC
VANALOG
±10
Analog Signal Range
V
120
rDS(ON)
Switch ON Resistance
VS = -10V
ohms
120
240
IIN
ID(OFF)
IS(OFF)
II+
Logic Input
Leakage Current
1.0
Switch OFF
Leakage Current
100
Supply
Quiescent Current
-20
VS = +10V
µA
2.0
VD = +10V, VS = -10V
nA
100
VS = +10V, VD = -10V
µA
20
3.0V
LOGIC INPUT
t RISE < 6nSEC
t FALL < 4nSEC
50%
0
(VS ) SWITCH INPUT
V0
0.9
SWITCH OUTPUT
0
V0 =
(R
L
VIN = +5.0V
VIN = +15V
TEST WAVE FORMS
RL
VS = +2.0V
tON
)
+ r DS(ON) VS
t OFF
CWB308 / CWB309
CORPORATION
FUNCTIONAL BLOCK DIAGRAMS (1 of 4 channels)
Switch Contacts:
V+
IN
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.
LT
IL
D
S
GND
VCMOS CIRCUITRY
DMOS SWITCH
SWICHING TIMES
-VSSUPPLY VOLTAGES
SWITCHING TIMES TEST CIRCUIT
300
Switching Time (nSec)
+15V
SWITCH
OUTPUT
SWITCH
INPUT
+3V
C L = 35pF
RL =
1K Ω
LOGIC
INPUT
TA = +25 oC
t on
200
t off
100
-15V
0
+10
_
+5
_
+15
_
Supply Voltages (Volts)
OFF ISOLATION TEST CIRCUIT
V+
KROHNHITE
240D
(or equivalent)
D
50
Ω
LOGIC 1 = +5V
PHILIPS
SCOPE
A
B
PM3214
(or equivalent)
S
C = 0.22 µ F // 10 µ F
50
Ω
VC
OFF-ISOLATION
OIRR - OFF Isolation Rejection Ratio (db)
C
OFF ISOLATION REJECTION RATIO
-VSFREQUENCY
60
55
50
45
40
35
V-, V+ = _
+15V
R L = 50 Ω
TA = +25 oC
20
30
40
50
f - Frequency (MHz
60
70
80
90 100
CWB308 / CWB309
CORPORATION
SWITCH ON RESISTANCE
SWITCH ON RESISTANCE
-VSANALOG VOLTAGE
V-, V+ = _
+15V
R L = 50 Ω
TA = +25 oC
120
SWITCH ON RESISTANCE
-VSSUPPLY VOLTAGES
r DS(on)- Switch ON Resistance (Ohms)
r DS(on)- Switch ON Resistance (Ohms)
140
100
80
60
40
65
R L = 50 Ω
Vanalog = 100mVrms
f = 1KHz
60
55
TA = +25 oC
50
45
+5.0
_
_
+6.0
_
+8.0
_
+10
_
+12
_
+15
V-, V+ - Supply Voltages (Volts)
20
0
-10
-5.0
0
+10
+5.0
V S - Source Voltage (Volts)
SWITCH ON RESISTANCE -VS- FREQUENCY TEST CIRCUIT
V+
C
HP
TRACKING
GENERATOR
(or equivalent)
D
50
Ω
LOGIC 1 = +5V
HP
SPECTRUM
ANALYSER
(or equivalent)
S
C = 0.22 µ F // 10 µ F
50
Ω
VC
20MHz to 100MHz
SWITCH ON RESISTANCE
-VSFREQUENCY
SWITCH ON RESISTANCE
-VSSUPPLY VOLTAGES AND FREQUENCY
65
Switch ON Resistance (Ω /V)
r DS(on) - Switch ON Resistance (Ohms)
ON-RESISTANCE
V-, V+ = _
+8.0V
_
60 V-, V+ = +10V
V-, V+ = +12V
_
55
V-, V+ = +15V
_
R L = 50 Ω
Vanalog = 100mVrms
50
20
TA = +25 oC
40
60
f - Frequency (MHz)
80
100
.55
.50
.45
.40
V-, V+ = +10V
_
R L = 50 Ω
Vanalog = 100mVrms
TA = +25 oC
V-, V+ = +12V
_
.35
.30
20
40
60
f - Frequency (MHz)
80
100
CWB308 / CWB309
CORPORATION
DISTORTION -VS- FREQUENCY
V+
TOTAL HARMONIC DISTORTION
-VSFREQUENCY
HP
GENERATOR
(or equivalent)
Total Harmonic Distortion (%)
C
D
50
Ω
LOGIC 1 = +5V
HP
SPECTRUM
ANALYSER
(or equivalent)
S
C = 0.22 µ F // 10 µ F
50
Ω
0.80
V-, V+ = +10V
_
Vanalog = 1.0Vrms
V-, V+ = +
_ 15V Vanalog = 1.0Vrms
0.50
V-, V+ = +
_ 15V Vanalog = 0.3Vrms
0.20
0.10
TA = +25 oC
0.05
10
20
40
f - Frequency (MHz)
VC
HARMONIC DISTORTION
10MHz - 40MHz
DISTORTION
-VSANALOG INPUT VOLTAGE
Distortion (%)
10.0
5.0
2.0
1.0
V- = -15V, V+ = +15V
f = 10KHz, R L = 50 Ω
TA = +25 oC
Total Harmonic
0.3
0.1
0.05
Compensated
0.02
0.3
1.0
5.0
3.0
Vanalog - Analog Input (Vrms)
POWER SUPPLY REJECTION RATIO POWER SUPPLY DECOUPLING CIRCUIT
.22 µ F
V+
1K Ω
POWER SUPPLY REJECTION RATIO
-VSFREQUENCY
90
IN
IL
LT
S
.22 µ F
D
1K Ω
V-
PSRR - Power Supply
Rejection Ratio (dB)
-PSRR, +PSRR with Decoupling
80
70
-PSRR
60
V- = 15V, V+ = +15V
50
VMOD = 4.0V -f-p
w/o Decoupling
+PSRR
40
CWB309CP TA = +25 oC
30
0.1
0.2
0.5
1.0
2.0
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.
5.0
10.0
20
CWB308 / CWB309
CORPORATION
APPLICATIONS
LOW DISTORTION, RAIL-TO-RAIL ANALOG SWITCH
Features very low distortion for low frequency and large
signal applications.
C1
R4
R3
R5
+V
C2
V+
R1
ANALOG IN
ANALOG OUT
R6
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.
V-
R2
-V
LOGIC INVERTER
V+
R1
ANALOG IN
ANALOG OUT
5V
R2
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.