®
®
MX-850
Precision, Higher-Speed
4-Channel, Analog Multiplexers
INNOVATION and EXCELLENCE
FEATURES
•
•
•
•
•
•
50ns settling time to ±0.01%
70ns settling time to ±0.003%
100ns settling time to ±0.001%
4 Channels, single-ended inputs
100mW power dissipation
Small, 14-pin DIP package
GENERAL DESCRIPTION
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
1
2
3
4
5
6
7
8
9
10
11
12
13
14
FUNCTION
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
Disable
1
2
3
4
MUX ADDRESS
A
1
X
0
0
1
1
EN
1
0
0
0
0
A
0
X
0
1
0
1
7
+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
Figure 1. Functional Block Diagram
DATEL, Inc., Mansfield, MA 02048 (USA)
•
Tel: (508) 339-3000, (800) 233-2765 Fax: (508) 339-6356
•
Email: sales@datel.com
•
Internet: www.datel.com
®
®
MX-850
ABSOLUTE MAXIMUM RATINGS
PARAMETER
+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
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.
0
—
+70
°C
–55
—
+125
°C
–65
—
+150
°C
14-pin, metal-sealed, ceramic DIP
0.1 ounces (2.8 grams)
+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
MIN.
—
—
—
—
—
—
—
—
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
Analog Signal Range
On Resistance, +25°C
0 to +70°C
–55 to +125°C
R
ON
versus V
IN
Input Leakage Current (Off)
+25°C
0 to +70°C
–55 to +125°C
Output Leakage Current (Off)
+25°C
0 to +70°C
–55 to +125°C
On Channel Leakage Current
+25°C
0 to +70°C
–55 to +125°C
Channel Input Capacitance
Off
On
Channel Output Capacitance
On
Nonlinearity
Large signal bandwidth
(–3dB)
DIGITAL INPUTS
Logic levels
Logic "1"
Logic "0"
Logic Loading "1"
Logic Loading "0"
MIN.
±10
—
—
—
TYP.
MAX.
UNITS
Volts
Ohms
Ohms
Ohms
—
—
18
90
—
120
—
140
See Figure 2
±0.02
—
—
±0.02
—
—
±0.4
—
—
4
10
8
—
100
±0.2
±10
±25
±0.2
±20
±40
±1
±25
±35
6
12
10
±0.001
—
—
—
—
—
—
—
—
—
—
—
—
—
—
80
nA
nA
nA
nA
nA
nA
nA
nA
nA
pF
pF
pF
%FSR
MHz
207
270
—
270
—
280
See Figure 4
TECHNICAL NOTES
+2.0
—
—
—
—
—
—
—
—
+0.8
+10
–10
Volts
Volts
µA
µA
SWITCHING CHARACTERISTICS
Access Time
Break-Before-Make Delay Time
Enable Delay (On, Off)
Settling Time, 10M Load
10V step to ±0.1%
10V step to ±0.01%
10V step to ±0.003%
10V step to ±0.001%
Settling Time, 5k Load
10V step to ±0.1%
10V step to ±0.01%
10V step to ±0.003%
10V step to ±0.001%
Settling Time, 10M Load
20V step to ±0.1%
20V step to ±0.01%
20V step to ±0.003%
20V step to ±0.001%
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
3
25
40
60
80
25
40
60
80
30
50
75
100
20
10
10
30
50
70
100
30
50
70
100
35
60
85
120
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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.
®
®
MX-850
+125°C
120
110
100
POWER DISSIPATION (W)
90
R
ON
(Ohms)
80
70
60
50
40
30
20
10
0.2
1.2
1.5
+25°C
1.0
0.75 W
0.7
55°C
0.5
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
CURRENT LIMITING RESISTORS
120
100
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
CROSSTALK (dB)
80
60
40
20
Other current limiting circuits can be used, such as a current
limited op amp drive, depending upon the application.
0
100kHz
1MHz
10MHz
100MHz
INPUT FREQUENCY
1µF
+
0.01µF
Figure 3a. Small Signal Crosstalk Versus Input Frequency
12
1
LOGIC
CONTROL
2
3
EN
A0
+
A1
MX-850
CH1
CH2
CH3
8
CH4
9
GROUND
11
13
OUTPUT
10
+
1µF
0.01µF
+5V
15V
14
1µF
15V
0.01µF
±1V
CH1
R
ANALOG
INPUTS
(±10V @
±20mA
Max.)
R
R
R
CH2
MX-850
10M
CH4
10pF
4
5
6
7
+15V
+15V
CH3
(Load of a X10 probe)
Figure 5. Typical Connections
Figure 3b. Crosstalk Test Circuit
®
®
MX-850
Table 2. 8 Channel Addressing
INPUT CHANNELS 1-8
1
2
3
4
5
6
7
8
ON
CHANNEL
1
2
3
4
5
6
7
8
1
0
0
0
0
1
1
1
1
MUX ADDRESS
2
0
0
1
1
0
0
1
1
3
0
1
0
1
0
1
0
1
IN1
IN2
IN3
IN4
OUT
A0
IN1
IN2
IN3
IN4
OUT
OUTPUT
A0
MX-850
EN
A1
MX-850
EN
A1
(1)
(2)
(3)
CHANNEL EXPANSION
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.
CHANNEL ADDRESS
Figure 6. Cascading Multiple MX-850’s
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
MX-850MC
MX-850MM
OPERATING
TEMP. RANGE
0 to +70°C
–55 to +125°C
For availability of a high-reliability (QL) version, contact DATEL.
DATEL, Inc., Mansfield, MA 02048 (USA)
•
Tel: (508) 339-3000, (800) 233-2765 Fax: (508) 339-6356
•
Email: sales@datel.com
•
Internet: www.datel.com
DATEL 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. The DATEL logo is a registered DATEL, Inc. trademark.
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