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PDF MAX4632 Data sheet ( Hoja de datos )
| Número de pieza | MAX4632 | |
| Descripción | Fault-Protected / High-Voltage / Dual Analog Switches | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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19-1515; Rev 0; 7/99
Fault-Protected, High-Voltage,
Dual Analog Switches
General Description
The MAX4631/MAX4632/MAX4633 high-voltage, dual
analog switches are pin compatible with the industry-stan-
dard DG401/DG403/DG405. They upgrade the existing
devices with fault-protected inputs and Rail-to-Rail® signal
handling capabilities. The MAX4631/MAX4632/MAX4633’s
normally open (NO) and normally closed (NC) terminals
are protected from overvoltage faults up to 36V during
power-up or power-down. During a fault condition, these
terminals become open circuit and only nanoamperes of
leakage current flow from the source, yet the switch output
(COM_) continues to furnish up to 18mA of the appropri-
ate polarity supply voltage to the load. This ensures unam-
biguous rail-to-rail outputs when a fault begins and ends.
On-resistance is 85Ω (max) at +25°C and is matched
between switches to 6Ω (max). Off-leakage current is only
0.5nA at +25°C and 5nA at +85°C.
The MAX4631 has two NO single-pole/single-throw (SPST)
switches. The MAX4632 has two NO/NC single-pole/
double-throw (SPDT) switches. The MAX4633 has two NO
double-pole/single-throw (DPST) switches.
These CMOS switches operate with dual power supplies
ranging from ±4.5V to ±18V or a single supply between
+9V and +36V. All digital inputs have +0.8V and +2.4V
logic thresholds, ensuring both TTL- and CMOS-logic
compatibility when using ±15V or a single +12V supply.
Applications
ATE Equipment
Data Acquisition
Industrial and Process Control Systems
Avionics
Redundant/Backup Systems
Pin Configurations appear at end of data sheet.
Features
o Fault Protection
±40V with Power Off
±36V with ±15V Supplies (MAX4631/MAX4633)
±25V with ±15V Supplies (MAX4632)
o Rail-to-Rail Signal Handling
o No Power-Supply Sequencing Required
o All Switches Off with Power Off
o Output Clamped to Appropriate Supply Voltage
During Fault Condition; No Transition Glitch
o 85Ω (max) Signal Paths with ±15V Supplies
o ±4.5V to ±18V Dual Supplies
+9V to +36V Single Supply
o Low Power Consumption: <6mW
o Pin Compatible with Industry-Standard
DG401/DG403/DG405
o TTL- and CMOS-Logic Compatible Inputs with
Single +9V to +15V, or ±15V Supplies
PART
MAX4631CSE
MAX4631CPE
MAX4631ESE
MAX4631EPE
MAX4631MJE
MAX4632CSE
MAX4632CPE
MAX4632ESE
MAX4632EPE
MAX4632MJE
MAX4633CSE
MAX4633CPE
MAX4633ESE
MAX4633EPE
MAX4633MJE
Ordering Information
TEMP. RANGE
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
PIN-PACKAGE
16 Narrow SO
16 Plastic DIP
16 Narrow SO
16 Plastic DIP
16 CERDIP
16 Narrow SO
16 Plastic DIP
16 Narrow SO
16 Plastic DIP
16 CERDIP
16 Narrow SO
16 Plastic DIP
16 Narrow SO
16 Plastic DIP
16 CERDIP
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
1 page  
Fault-Protected, High-Voltage,
Dual Analog Switches
ELECTRICAL CHARACTERISTICS—Single Supply (continued)
(V+ = +15V, V- = -15V, VINL_ = 0.8V, VINH_ = 2.4V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 3)
PARAMETER
SYMBOL
CONDITIONS
TA MIN TYP MAX UNITS
COM_ Output Leakage Current,
Supplies On
ICOM_
VNO_ or VNC_ = ±25V,
no connection to “on” channel
(MAX4632 only)
C, E
M
-10
-1
10 nA
1 µA
NO_ or NC_ Input Leakage
Current, Supplies On
NO_ or NC_ Input Leakage
Current, Supplies Off
COM_ Output Clamp Current,
Supplies On
INO_, INC_
VNO_ or VNC_ = ±25V,
VCOM_ = ±10V
INO_, INC_ VNO_ or VNC_ = ±40V
ICOM_
VNO_ or VNC_ = 25V
C, E -100
100
M -10
10
C, E -100 1 100
M -10
10
+25°C
4
5.5 10
nA
µA
nA
µA
mA
COM_ Output Clamp Resistance,
Supplies On
RCOM_
LOGIC INPUT
IN_ Input Logic Voltage High
IN_ Input Logic Voltage Low
VINH_
VINL_
IN_ Input Current Logic
High or Low
IINH_, IINL_
SWITCH DYNAMIC CHARACTERISTICS
VNO_ or VNC_ = 25V
VVIINN__
=
=
0.8V
0.8V
or
or
2.4V
2.4V
Turn-On Time
tON
VCOM_ = ±10V, RL = 2kΩ,
Figure 2
Turn-Off Time
Break-Before-Make Time Delay
(MAX4632 only)
tOFF
tBBM
VCOM_ = ±10V, RL = 2kΩ,
Figure 2
VCOM_ = ±10V, RL = 2kΩ,
Figure 3
+25°C
1 2.5
C, E, M 2.4
C, E, M
0.8
+25°C -1 0.03 1
C, E, M
-5
5
+25°C
C, E,
M
+25°C
C, E,
M
+25°C
5
140 250
300
500
100 200
250
400
40
kΩ
V
V
µA
µA
ns
ns
ns
Charge Injection (Note 6)
NO_, NC_ Off-Capacitance
COM_ Off-Capacitance
Q
CL = 100pF, Figure 4,
NO_ = NC_ = GND, RS = 0
CNC_(OFF), NO_ = NC_ = GND,
CNO_(OFF) f = 1MHz, Figure 5
CCOM_(OFF)
COM_ = GND, f = 1MHz,
Figure 5
+25°C
C, E, M
C, E, M
5
20
20
pC
pF
pF
COM_ On-Capacitance
CCOM_(ON)
COM_ = NO_ = NC_ = GND,
f = 1MHz, Figure 5
C, E, M
25
pF
Off-Isolation
(Note 7)
VISO
RL = 50Ω, CL = 15pF,
VNO_ = VNC_ = 1VRMS,
f = 1MHz, Figure 6
C, E, M
-62
dB
Channel-to-Channel Crosstalk
(Note 8)
RL = 50Ω, CL = 15pF,
VCT VNO_ = VNC_ = 1VRMS,
f = 1MHz, Figure 7
C, E, M
-65
dB
_______________________________________________________________________________________ 5
5 Page 
Fault-Protected, High-Voltage,
Dual Analog Switches
High-Frequency Performance
In 50Ω systems, signal response is reasonably flat up
to 30MHz (see Typical Operating Characteristics).
Above 30MHz, the on-response has several minor
peaks that are highly layout dependent. The problem
with high-frequency operation is not turning the switch
on, but turning it off. The off-state switch acts like a
capacitor and passes higher frequencies with less
attenuation. At 10MHz, off-isolation is about -46dB in
50Ω systems, declining (approximately 20dB per
decade) as frequency increases. Higher circuit imped-
ance also diminishes off-isolation. Adjacent channel
attenuation is about 3dB above that of a bare IC socket
and is due entirely to capacitive coupling.
V+
V+
NO_ OR NC_
+10V
MAX4631
MAX4632
VIN_ IN_ MAX4633 COM_
50Ω
GND V-
RL
VOUT
10pF
V-
Test Circuits/Timing Diagrams
V+
VIN_
0V
+10V
VOUT
0V
tOFF
50%
90%
50%
90%
tON
V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION.
Figure 2. Switch Turn-On/Turn-Off Times
V+
VIN_
IN_
IN_
50Ω
V+
NO_
NC_
MAX4631
COM_
COM_
GND V-
V-
+10V
VOUT
RL 10pF
V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION.
Figure 3. MAX4631 Break-Before-Make Interval
V+
VIN_
0V
VNO_, VNC_
VOUT
0V
tR < 5ns
tF < 5ns
50% 50%
80%
tOPEN
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet MAX4632.PDF ] | |
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