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PDF ( 数据手册 , 数据表 ) DG190

零件编号 DG190
描述 High-Speed Drivers with Dual SPDT JFET Switches
制造商 Vishay Siliconix
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DG190 数据手册, 描述, 功能
DG189/190/191
Vishay Siliconix
High-Speed Drivers with Dual SPDT JFET Switches
FEATURES
D Constant On-Resistance Over
Entire Analog Range
D Low Leakage
D Low Crosstalk
D Rad Hardness
BENEFITS
D Low Distortion
D Eliminates Large Signal Errors
D High Precision
D High Bandwidth Capability
D Fault Protection
APPLICATIONS
D Audio Switching
D Video Switching
D Sample/Hold
D Guidance and Control Systems
D Aerospace
DESCRIPTION
The DG189/190/191 are precision dual single-pole,
double-throw (SPDT) analog switches designed to provide
accurate switching of video and audio signals. This series is
ideally suited for applications requiring a constant
on-resistance over the entire analog range.
The major difference in the devices is the on-resistance
(DG189—10 W, DG190—30 W, DG191—75 W). Reduced
errors are achieved through low leakage current (ID(on)
< 2 nA). Applications which benefit from the flat JFET
on-resistance include audio switching, video switching, and
data acquisition.
To achieve fast and accurate switch performance, each device
comprises four n-channel JFET transistors and a TTL
compatible bipolar driver. The driver is designed to achieve
break-before-make switching action, eliminating the
inadvertent shorting between channels and the crosstalk
which would result. In the on state, each switch conducts
current equally well in either direction. In the off condition, the
switches will block up to 20 V peak-to-peak, with feedthrough
of less than –60 dB at 10 MHz.
FUNCTIONAL BLOCK DIAGRAM AND PIN CONFIGURATION
Dual-In-Line
D1 1
NC 2
D3 3
S3 4
S4 5
D4 6
NC 7
D2 8
16 S1
15 IN1
14 V–
13 VR
12 VL
11 V+
10 IN2
9 S2
Top View
Flat Package
S4 1 14 S3
D4 2 13 D3
D2 3 12 D1
S2 4 11 S1
IN2 5 10 IN1
V+ 6 9 V–*
VL 7 8 VR
Top View
Refer to JAN38510 Information, Military Section
*Common to Substrate and Case
Document Number: 70034
S-52880—Rev. C, 28-Apr-97
TRUTH TABLE
Logic
0
1
SW1, SW2
OFF
ON
SW3, SW4
ON
OFF
Logic “0” v 0.8 V
Logic “1” w 2.4 V
www.vishay.com S FaxBack 408-970-5600
4-1







DG190 pdf, 数据表
DG189/190/191
Vishay Siliconix
TEST CIRCUITS
Feedthrough due to charge injection may result in spikes at the leading and trailing edge of the output waveform.
+5 V
VL
VS1 S1
VS2 S3
IN
VR
+15 V
V+
D1
D3
V–
–15 V
tON: VS = 3 V
tOFF: VS = –3 V
RL
1 kW
Logic
Input
VO
3V
0V
CL
100 pF
3V
0V
Switch
Output
CL (includes fixture and stray capacitance)
RL
VOUT + VS x RL ) rDS(on)
–3 V
50%
90%
tON
FIGURE 2. Switching Time
tr <10 ns
tf <10 ns
tOFF
0V
90%
APPLICATION HINTSa
Switch
V+
Positive
Supply Voltage
(V)
V–
Negative
Supply
Voltage
(V)
VL
Logic Supply
Voltage
(V)
VR
Reference
Supply
Voltage
(V)
DG189
DG190
DG191
15b
10
12
15b
10
12
–15
–20
–12
–15
–20
–12
5
5
5
5
5
5
GND
GND
GND
GND
GND
GND
Notes:
a. Application Hints are for DESIGN AID ONLY, not guaranteed and not subject to production testing.
b. Electrical Parameter Chart based on V+ = 15 V, VL = 5 V, VR = GND
VIN
Logic Input
Voltage
VINH(min)/VINL(max
)
(V)
2.0/0.8
2.0/0.8
2.0/0.8
2.0/0.8
2.0/0.8
2.0/0.8
VS
Analog
Voltage
Range
(V)
–7.5 to 15
–12.5 to 10
–4.5 to 12
–10 to 15
–15 to 10
–7 to 12
www.vishay.com S FaxBack 408-970-5600
4-8
Document Number: 70034
S-52880—Rev. C, 28-Apr-97














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