®
®
MX-850
Precision, High-Speed 4-Channel Analog Multiplexers
FEATURES
settling time to ±0.01%
50ns
settling time to ±0.003%
70ns
100ns settling time to ±0.001%
Channels, single-ended inputs
4
100mW power dissipation
Small, 14-pin DIP package
PRODUCT OVERVIEW
The MX-850 is a precision, high-speed
multiplexer characterized for 10, 12, 14 and 16-
bit applications. The performance benchmarks
are its 50 nanosecond maximum settling time
to ±0.01% accuracy and its unprecedented
±0.001% accuracy specification.
Packaged in a miniature, 14-pin, ceramic DIP, the
MX-850 operates from ±15V and +5V supplies
and consumes a maximum 270mW. Models are
available for either 0 to +70°C or –55 to +125°C
operation.
INPUT/OUTPUT CONNECTIONS
PIN
FUNCTION
1
2
3
4
5
A0
ENABLE
A0
A1
CH1 INPUT
CH2 INPUT
CH3 INPUT
CH4 INPUT
OUTPUT
GROUND
+15V SUPPLY
GROUND
+5V SUPPLY
GROUND
–15V SUPPLY
Table 1. Channel Addressing
ON
CHANNEL
MUX ADDRESS
EN
A1
6
7
8
9
10
11
12
13
14
Disable
1
2
3
4
1
0
0
0
0
X
0
0
1
1
X
0
1
0
1
FUNCTIONAL BLOCK DIAGRAM
+15V SUPPLY
10
CH1
4
CH2
5
8 OUTPUT
CH3
6
12 +5V SUPPLY
CH4
7
SWITCH
DRIVER
9, 11, 13 GROUND
ENABLE
1
14 15V SUPPLY
2
A0
3
A1
DATEL
•
11 Cabot Boulevard, Mansfield, MA 02048-1151 USA
•
Tel: (508) 339-3000
•
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MDA_MX850.B01
Page 21 of 6
®
®
MX-850
Precision, High-Speed 4-Channel Analog Multiplexers
Units
Volts
Volts
Volts
Volts
Volts
mA
°C
MHz/%
SWITCHING CHAR. (cont.)
Settling Time, 5k Load
20V step to ±0.1%
20V step to ±0.01%
20V step to ±0.003%
20V step to ±0.001%
Crosstalk
➀
10kHz (20Vp-p)
1MHz (20Vp-p)
10MHz (5Vp-p)
20MHz (3Vp-p)
POWER REQUIREMENTS
Power Supply Range
+15V Supply
–15V Supply
+5V Supply
Power Supply Current, Quiescent
+15V Supply
–15V Supply
+5V Supply
Power Supply Rejection Ratio
Power Supply Dissipation, Quiescent
+25°C
0 to +70°C
–55 to +125°C
Pd versus Frequency
PHYSICAL/ENVIRONMENTAL
Operating Temp. Range, Case
MX-850MC
MX-850MM
Storage Temperature Range
Package Type
Weight
➀
See Figures 3a and 3b.
MIN.
—
—
—
—
—
—
—
—
ABSOLUTE MAXIMUM RATINGS
Parameters
+15V Supply,
Pin 10
–15V Supply,
Pin 14
+5V Supply,
Pin 12
Digital Inputs,
Pins 1, 2, 3
Analog Inputs,
Pins 4, 5, 6, 7
Analog Input Current
Lead temperature
(10 seconds)
Switching Frequency/Duty Cycle
Limits
–0.5 to +16.5
+0.5 to –16.5
–0.5 to +7
–0.5 to +6
–10.5 to +10.5
±20
300
10/50
TYP.
30
50
75
100
–105
–94
–76
–64
MAX.
35
60
85
120
–100
–92
–71
–62
UNITS
ns
ns
ns
ns
dB
dB
dB
dB
FUNCTIONAL SPECIFICATIONS
(Apply over the operating temperature range and over the operating power supply
range unless otherwise specified.)
ANALOG INPUTS
MIN.
TYP.
MAX.
UNITS
±10
—
—
Volts
Analog Signal Range
—
18
90
Ohms
On Resistance, +25°C
—
—
120
Ohms
0 to +70°C
—
—
140
Ohms
–55 to +125°C
See Figure 2.
R
ON
versus V
IN
Input Leakage Current (Off)
—
8
50
nA
+25°C
—
—
0.1
μA
0 to +70°C
—
—
0.4
μA
–55 to +125°C
Output Leakage Current (Off)
—
0.02
0.2
nA
+25°C
—
—
20
nA
0 to +70°C
—
—
40
nA
–55 to +125°C
On Channel Leakage Current
—
10
50
nA
+25°C
—
—
0.1
μA
0 to +70°C
—
—
0.4
μA
–55 to +125°C
Channel Input Capacitance
—
4
6
pF
Off
—
10
12
pF
On
Channel Output Capacitance
—
8
10
pF
On
—
—
±0.001
%FSR
Nonlinearity
80
100
—
MHz
Large signal bandwidth
(–3dB)
DIGITAL INPUTS
Logic levels
+2.0
—
—
Volts
Logic "1"
—
—
+0.8
Volts
Logic "0"
—
—
+10
μA
Logic Loading "1"
—
—
–10
μA
Logic Loading "0"
SWITCHING CHARACTERISTICS
—
—
20
ns
Access Time
—
—
10
ns
Break-Before-Make Delay Time
—
3
10
ns
Enable Delay (On, Off)
Settling Time, 10M Load
—
25
30
ns
10V step to ±0.1%
—
40
50
ns
10V step to ±0.01%
—
60
70
ns
10V step to ±0.003%
—
80
100
ns
10V step to ±0.001%
Settling Time, 5k Load
—
25
30
ns
10V step to ±0.1%
—
40
50
ns
10V step to ±0.01%
—
60
70
ns
10V step to ±0.003%
—
80
100
ns
10V step to ±0.001%
Settling Time, 10M Load
—
30
35
ns
20V step to ±0.1%
—
50
60
ns
20V step to ±0.01%
—
75
85
ns
20V step to ±0.003%
—
100
120
ns
20V step to ±0.001%
DATEL
•
+14.5
–14.5
+4.75
—
—
—
–80
—
—
—
+15
–15
+5
+3
–10
+3
–90
+15.5
–15.5
+5.25
+4
–12
+3.5
—
Volts
Volts
Volts
mA
mA
mA
dB
mW
mW
mW
207
270
—
270
—
280
See Figure 4.
0
—
+70
°C
–55
—
+125
°C
–65
—
+150
°C
14-pin, metal-sealed, ceramic DIP
0.1 ounces (2.8 grams)
TECHNICAL NOTES
1. Proper operation of the MX-850 multiplexer is dependent upon good board layout
and connection practices. Bypass supplies as shown in the connection diagrams.
Mount bypass capacitors directly to the supply pins whenever possible.
2. All grounds pins (9, 11, 13) should be tied together and connected to ground as
close to the multiplexer as possible.
3. When power is off, current limit input signals on pins 4, 5, 6, and 7 to 20mA.
Failure to current limit can cause permanent damage to the device since, when
powering up or down it is possible that two switches might be on at the same
time. Excessive current (greater than 20mA) will flow from the more positive
input to the more negative input, permanently damaging the device. Applications
in which the power supply for the multiplexer also powers the signal sources
may not require limiting resistors. See Figure 4.
11 Cabot Boulevard, Mansfield, MA 02048-1151 USA
•
Tel: (508) 339-3000
•
www.datel.com •
e-mail: help@datel.com
MDA_MX850.B01
Page 22 of 6
®
®
MX-850
Precision, High-Speed 4-Channel Analog Multiplexers
+125°C
1.5
120
110
100
POWER DISSIPATION (W)
90
R
ON
(Ohms)
80
70
60
50
40
30
20
10
55°C
+25°C
1.2
1.0
0.75 W
0.7
0.5
0.2
10
8
6
4
2
0
2
4
6
8
10
1
2
3
4
INPUT VOLTAGE (Volts)
5
6
7
FREQUENCY (MHz)
8
9
10
Figure 2. Channel On Resistance Versus Input Voltage
Figure 4. Power Dissipation Versus Switching Frequency
Figure 3a. Small Signal Crosstalk Versus Input Frequency
120
CURRENT LIMITING RESISTORS
As noted in Technical Note 3, some current limiting technique must be
employed to protect the device. The following lists the suggested resistor
values for the current limiting resistors shown in Figure 5.
Input Range
±10V
±5V
≤±1V
Limiting Resistors
R = 500Ω
R = 250Ω
No current limiting needed
100
CROSSTALK (dB)
80
60
40
Other current limiting circuits can be used, such as a current limited op
amp drive, depending upon the application.
20
0
100kHz
1MHz
10MHz
100MHz
INPUT FREQUENCY
1µF
+
0.01µF
12
1
LOGIC
CONTROL
CH1
R
ANALOG
INPUTS
(±10V @
±20mA
Max.)
R
R
R
4
5
6
7
MX-850
CH1
CH2
CH3
8
CH4
9
GROUND
11
13
OUTPUT
+15V
10
+
1µF
0.01µF
+15V
2
3
EN
A0
+
A1
+5V
15V
14
1µF
15V
0.01µF
CH2
MX-850
10M
CH4
10pF
CH3
(Load of a X10 probe)
Figure 3b. Crosstalk Test Circuit
Figure 5. Typical Connections
DATEL
•
11 Cabot Boulevard, Mansfield, MA 02048-1151 USA
•
Tel: (508) 339-3000
•
www.datel.com •
e-mail: help@datel.com
MDA_MX850.B01
Page 23 of 6
®
®
MX-850
Precision, High-Speed 4-Channel Analog Multiplexers
Table 2. 8 Channel Addressing
MUX ADDRESS
2
INPUT CHANNELS 1-8
1
2
3
4
5
6
7
8
ON
CHANNEL
1
3
IN1
IN2
IN3
IN4
OUT
A0
IN1
IN2
IN3
IN4
OUT
OUTPUT
A0
MX-850
EN
A1
MX-850
EN
A1
1
2
3
4
5
6
7
8
4
0
0
0
0
1
1
1
1
0
0
0
1
1
0
0
1
1
1
0
1
0
1
0
1
0
1
1
CHANNEL EXPANSION
(1)
(2)
(3)
CHANNEL ADDRESS
Figure 6. Cascading Multiple MX-850’s
The MX-850’s ENABLE input provides a means of channel expansion. As
shown in Figure 6 and in Table 2, multiple multiplexers may be used by
using the ENABLE input as an address line.
MECHANICAL DIMENSIONS
INCHES (mm)
0.805 MAX.
(20.45)
14-PIN DIP
Dimension
Tolerances
(unless otherwise indicated):
2 place decimal (.XX) ±0.010 (±0.254)
3 place decimal (.XXX) ±0.005 (±0.127)
Lead Material:
Kovar alloy
Lead Finish:
50 microinches (minimum) gold plating
over 100 microinches (nominal) nickel plating
0.100 TYP.
(2.540)
14
1
8
7
0.500 MAX.
(12.70)
0.195 MAX.
(4.953)
0.600 ±0.005
(15.240)
0.200 MAX.
(5.080)
0.160 MAX.
(4.064)
0.100
(2.540)
0.018 ±0.002
(0.457)
0.010 ±0.002
(0.254)
SEATING
PLANE
0.025 ±0.010
(0.635)
0.100
(2.540)
0.300 ±0.010
(7.620)
ORDERING INFORMATION
Model Number
Operating Temp. Range
MX-850MC
0 to +70°C
MX-850MM
-55 to +125°C
MX-850MM-QL
-55 to +125°C
MX-850MC-C
0 to +70°C
MX-850MM-C
-55 to +125°C
MX-850MM-QL-C
-55 to +125°C
RoHS
No
No
No
Yes
Yes
Yes
DATEL
11 Cabot Boulevard, Mansfield, MA 02048-1151 USA
ITAR and ISO 9001/14001 REGISTERED
. makes no representation that the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not
imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change
without notice.
© 2012
www.datel.com • e-mail: help@datel.com
MDA_MX850.B01
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