MURATA HDAS-8

HDAS-16, HDAS-8
12-Bit, 50kHz, Complete
Data Acquisition Systems
FEATURES
Miniature 62-pin cermanic package
12-Bit resolution, 50kHz throughput
Full-scale input range from 50mV to 10V
Three-state outputs
16 S.E. or 8 differential input channels
Auto-sequencing channel addressing
MIL-STD-883 versions
No missing codes
GENERAL DESCRIPTION
Using thin and thick-film hybrid technology, Murata Power Solutions offers
complete low-cost data acquisition systems with superior performance and
reliability.
Internal HDAS circuitry includes:
Analog input multiplexer (16 S.E. or 8 diff.)
The HDAS-8 (with 8 differential input channels) and the HDAS-16 (with
16 single-ended input channels) are complete, high-performance, 12-bit data
acquisition systems in 62-pin packages. Each HDAS may be expanded up to
32 single-ended or 16 differential channels by adding externalmultiplexers.
10 Volt buffered reference
Resistor-programmable instrumentation amplifier
Sample-and-hold circuit complete with MOS hold capacitor
12-bit A/D converter with three-state outputs and control logic
40 38 36 37
I/A
16 CHANNEL
SINGLE ENDED
OR
8 CHANNEL
DIFFERENTIAL
ANALOG
MULTIPLEXER
S/H
12-BIT
A/D
CONVERTER
THREE
STATE
(HOLD)
THREE
STATE
(START)
MUX
ADDRESS IN
43 18 17
DIG COM
44 42
+5V SUPPLY
LOAD
41
+15V SUPPLY
STROBE
20
–15V SUPPLY
ANA PWR COM
RDELAY
16 15 1413
CLEAR
19
ANA SIG COM
8
RA1
RA2
RA4
RA8
6
A8
A4
A2
9
MUX
ADDRESS OUT
BIT 1
(MSB)
BIT 2
BIT 3
BIT 4
EN (1-4)
BIT 5
BIT 6
BIT 7
BIT 8
EN (5-8)
BIT 9
BIT 10
BIT 11
BIT 12 (LSB)
EN (9-12)
EOC
MUX
ADDRESS
REGISTER
CONTROL
LOGIC
12 11 10
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
7
THREE STATE OUTPUT DATA
(BUFFERED)
S/H OUT
39
OFFSET ADJUST
ANA SIG COM
46
GAIN ADJUST
ANA SIG COM
45
BIPOLAR INPUT
RGAIN LO
47
+10V REF OUT
RGAIN HI
48
THREE
STATE
A1
4
3
2
1
62
61
60
59
58
57
56
55
54
53
52
51
AMP IN LO
5
CH0 HI /CH0
CH1 HI /CH1
CH2 HI /CH2
CH3 HI /CH3
CH4 HI /CH4
CH5 HI /CH5
CH6 HI /CH6
CH7 HI /CH7
CH0 LO /CH8
CH1 LO /CH9
CH2 LO /CH10
CH3 LO /CH11
CH4 LO /CH12
CH5 LO /CH13
CH6 LO /CH14
CH7 LO /CH15
49 50
AMP IN HI
MUX ENABLE
Internal channel address sequencing is automatic after each conversion,
or the user may supply external channel addresses.
Typical topology is shown.
Figure 1. Functional Block Diagram
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Technical enquiries email: [email protected], tel: +1 508 339 3000
MDC_HDAS-16/8.B01 Page 1 of 7
HDAS-16, HDAS-8
ABSOLUTE MAXIMUM RATINGS
PARAMETERS
+15V Supply (pin 43)
–15V Supply (pin 44)
+5V Supply (pin 18)
Analog Inputs Digital Inputs
Thermal Resistances:
Junction-Case
Case-Ambient
Junction-Ambient
Lead Temp. (10 seconds)
MIN.
TYP.
MAX.
UNITS
–0.5
+0.5
–0.5
–35
–0.5
—
—
—
—
—
+18
–18
+7
+35
+7
Volts
Volts
Volts
Volts
Volts
—
—
—
—
—
—
—
—
15
15
30
300
°C/Watt
°C/Watt
°C/Watt
°C
FUNCTIONAL SPECIFICATIONS
(The following specifications apply over the operating temperature range and power
supply range unless otherwise indicated.)
ANALOG INPUTS
Signal Range, Unipolar
Gain = 1
Gain = 200
Signal Range, Bipolar
Gain = 1
Gain = 200
Input Gain Equation Gain Equation Error
Instrumentation Amplifier
Input Impedance
Input Bias Current:
+25°C
–55 to +125°C
Input Offset Current:
+25°C
–55 to +125°C
Multiplexer
Channel ON Resistance
Channel OFF Input Leakage
Channel OFF Output Leakage
Channel ON Leakage
Input Capacitance
HDAS-16, Channel ON
HDAS-8, Channel ON
+25°C, Channel OFF
Input Offset Voltage
Gain = 1, +25°C
–55 to +125°C (max.)
Gain = 200, +25°C
–55 to +125°C (max.)
Common Mode Range
CMRR, Gain = 1, at 60Hz
Input Voltage Noise, Gain = 1
(Referred to input)
Channel Crosstalk
MIN.
TYP.
MAX.
UNITS
0
—
—
—
+10
+50
Volts
mV
–10
–50
—
108
—
—
—
+10
—
+50
Gain = 1 + (20kΩ/RGAIN)
—
±0.1
1012
—
Volts
mV
%
Ohms
—
±250
Doubles every 10°C
pA
—
±1
Doubles every 10°C
nA
—
—
—
—
—
±30
±1
±100
2
—
—
—
kΩ
pA
nA
pA
—
—
—
100
50
5
—
—
—
pF
pF
pF
—
—
±2
mV
(±3ppm/°C x Gain) ±20ppm/°C
—
—
±100
mV
(±3ppm/°C x Gain) ±20ppm/°C
±10
—
—
Volts
70
82
—
dB
—
—
150
—
200
–80
μVrms
dB
12
—
—
Bits
—
—
—
—
±1
±1
LSB
LSB
PERFORMANCE
Resolution
Integral Nonlinearity
0 to +70°C
–55 to +125°C
Differential Nonlinearity
0 to +70°C
–55 to +125°C
No Missing Codes
—
—
±1
LSB
—
—
±1
LSB
Over the operating temperature range
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PERFORMANCE (cont.)
MIN.
TYP.
MAX.
UNITS
—
—
—
—
±0.1
±0.3
%FSR
%FSR
—
—
—
—
±0.1
±0.3
%FSR
%FSR
—
—
—
—
±0.1
±0.3
%FSR
%FSR
—
—
—
—
±0.2
±0.3
%
%
—
—
—
—
—
—
9
—
—
—
—
—
10
15
500
1
±1
±0.01
μs
μs
ns
ns
μV/μs
%
—
—
6
—
8
10
μs
μs
50
33
66
—
—
—
kHz
kHz
+2.0
0
—
—
+5.5
+0.8
Volts
Volts
+4.0
0
—
—
+5.5
+0.8
Volts
Volts
—
—
20
—
40
—
—
—
20
—
±10
±10
—
30
—
μA
μA
ns
ns
ns
+2.4
+2.5
—
—
—
—
—
—
+0.4
Volts
Volts
Volts
+2.5
—
—
—
—
+0.4
Volts
Volts
—
—
—
—
–400
+4
μA
mA
Unipolar Zero Error
+25°C
–55 to +125°C
Bipolar Zero Error
+25°C –55 to +125°C
Bipolar Offset Error
+25°C –55 to +125°C
Gain Error
+25°C
–55 to +125°C
DYNAMIC CHARACTERISTICS
Acquisition Time, Gain = 1
+25°C
–55 to +125°C
Aperture Delay Time
Aperture Uncertainty
S/H Droop Rate
Feedthrough
A/D Conversion Time
+25°C
–55 to +125°C
Throughput Rate
+25°C
–55 to +125°C
DIGITAL INPUTS
Logic Levels
(Pins 8, 13–16, 19–21, 26, 31)
Logic 1
Logic 0
(Pin 5)
Logic 1
Logic 0
Logic Loading
(Pins 5, 8, 13–16, 19–21,
26, 31)
Logic 1
Logic 0
Multiplexer Address Set-up Time
ENABLE to Data Valid Delay
STROBE OUTPUTS
Logic Levels (Output Data)
Logic 1
Logic 1 (pin 7)
Logic 0
(Pins 9, 10, 11, and 12)
Logic 1
Logic 0
Logic Loading
Logic 1
Logic 0
Internal Reference:
Voltage, +25°C
Drift
External Current
Output Data Coding
+9.99
+10.00
+10.01
Volts
—
—
±20
ppm/°C
—
—
1
mA
Straight binary (unipolar) or offset binary (bipolar)
Technical enquiries email: [email protected], tel: +1 508 339 3000
MDC_HDAS-16/8.B01 Page 2 of 7
HDAS-16, HDAS-8
FUNCTIONAL SPECIFICATIONS (Continued)
POWER REQUIREMENTS
Power Supply Ranges
+15V Supply
–15V Supply
+5V Suppy
Power Supply Currents
+15V Supply
–15V Supply
+5V Suppy
Power Dissipation
INPUT/OUTPUT CONNECTIONS
MIN.
TYP.
MAX.
UNITS
+14.5
–14.5
+4.75
+15.0
–15.0
+5.0
+15.5
–15.5
+5.25
Volts
Volts
Volts
—
—
—
—
—
—
—
—
+33
–30
+15
1.25
mA
mA
mA
Watts
PHYSICAL/ENVIRONMENTAL
Operating Temp. Range, Case
MC Models
MM/883 Models
Storage Temperature Range
Weight
Package Type
0
–55
–65
—
+70
—
+125
—
+150
1.4 ounces (39.7 grams)
62-pin cermanic DIP
°C
°C
°C
Footnotes:
Analog inputs will withstand ±35V with power on. If the power is off, the maximum
safe input (no damage) is ±20V.
The gain equation error is guaranteed before external trimming and applies at
gains less than 50. This error increases at gains over 50.
Adjustable to zero.
STROBE pulse width must be less than EOC period to achieve maximum
throughput rate.
TECHNICAL NOTES
1. Input channels are protected to 20 Volts beyond the powersupplies.
All digital output pins have one second short-circuit protection.
2. To retain high system throughput rates while digitizing low-level signals,
apply external high-gain amplifiers foreach channel. MPS’s AM-551 is
suggested for such amplifier-per-channel applications.
3. The HDAS devices have self-starting circuits for free-running sequential
operation. If, however, in a power-upcondition the supply voltage slew rate
is less than 3V per microsecond, the free running state might not be initialized. Apply a negative pulse to the STROBE, to eliminate this condition.
4. For unipolar operation, connect BIPOLAR INPUT (pin 38) to S/H OUT (pin 39).
For bipolar operation, connect BIPOLAR INPUT (pin 38) to +10V REFERENCE
OUT (pin 40).
5. RDELAY may be a standard value 5% carbon composition or film-type resistor.
6. RGAIN must be very accurate with low temperature coefficients. If necessary, fabricate the gain resistor from a precision metal-film type in series
with a low value trim resistor or potentiometer. The total resistor temperature coefficient must be no greater than ±10ppm/°C.
7. ANALOG SIGNAL COMMON, POWER COMMON and DIGITAL COMMON are
connected internally. For optimal performance, tie all ground pins (17, 41,
42, 45, 46) directly to a large analog ground plane beneath the package.
8. For HDAS-16, tie pin 50 to a “signal source common” if possible. Otherwise
tie pin 50 to pin 41 (ANA SIG COM).
PIN NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
HDAS-16
HDAS-8
CH3 IN
CH2 IN
CH1 IN
CH0 IN
MUX ENABLE
RDELAY
EOC
STROBE
A8
MULTIPLEXER
A4
ADDRESS
A2
OUT
A1
RA8
MULTIPLEXER
RA4
ADDRESS
RA2
IN
RA1
DIGITAL COMMON
+5V SUPPLY
LOAD
CLEAR
ENABLE (Bits 9–12)
BIT 12 (LSB)
BIT 11
BIT 10
BIT 9
ENABLE (Bits 5–8)
BIT 8
BIT 7
BIT 6
BIT 5
ENABLE (Bits 1–4)
BIT 4
BIT 3
BIT 2
BIT 1 (MSB)
GAIN ADJUST
OFFSET ADJUST
BIPOLAR INPUT
SAMPLE/HOLD OUT
+10V REFERENCE OUT
ANALOG SIGNAL COMMON
ANALOG POWER COMMON
+15V SUPPLY
–15V SUPPLY
ANALOG SIGNAL COMMON
ANALOG SIGNAL COMMON
RGAIN LOW
RGAIN HIGH
AMP. IN HIGH AMP. IN LOW CH15 IN
CH14 IN
CH13 IN
CH12 IN
CH11 IN
CH10 IN
CH9 IN
CH8 IN
CH7 IN
CH6 IN
CH5 IN
CH4 IN
CH3
CH2
CH1
CH0
CH7
CH6
CH5
CH4
CH3
CH2
CH1
CH0
CH7
CH6
CH5
CH4
HIGH
HIGH
HIGH
HIGH
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
IN
IN
IN
IN
*
*
*
*
*
*
*
LOW IN
LOW IN
LOW IN
LOW IN
LOW IN
LOW IN
LOW IN
LOW IN
HIGH IN
HIGH IN
HIGH IN
HIGH IN
*Same as HDAS-16
Caution: Pins 49 and 50 do not have overvoltage protection; therefore, protected multiplexers,
such as MPS’s MX-1606 and MX-808 are recommended. See the General Operation description.
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Technical enquiries email: [email protected], tel: +1 508 339 3000
MDC_HDAS-16/8.B01 Page 3 of 7
HDAS-16, HDAS-8
Table 2. Calibration Table
Table 1. Description of Pin Functions
FUNCTION
LOGIC
STATE DESCRIPTION
DIGITAL INPUTS
STROBE
1 to 0
Initiates acquisition and conversion
of analog signal
0
Random address mode initiated on
falling edge of STROBE
1
Sequential address mode
CLEAR
0
Allows next STROBE pulse to reset
MULTIPLEXER ADDRESS to CH0
overriding LOAD COMMAND
MUX ENABLE
0
1
Disables internal multiplexer
Enables internal multiplexer
LOAD
MUX ADDRESS IN
ENABLE (1–4)
ENABLE (5–8)
ENABLE (9–12)
ADJUST
INPUT VOLTAGE
0 to +5V
ZERO
GAIN
+0.6mV
+4.9982V
0 to +10V
ZERO
GAIN
+1.2mV
+9.9963V
±2.5V
OFFSET
GAIN
–2.4994V
+2.4982V
±5V
OFFSET
GAIN
–4.9988V
+4.9963V
±10V
OFFSET
GAIN
–9.9976V
+9.9927V
BIPOLAR RANGE
Selects channel for random
address mode 8, 4, 2, 1
natural binary coding
DIGITAL OUTPUTS
EOC (STATUS)
UNIPOLAR RANGE
0
Conversion complete
1
Conversion in process
0
Enables three-state outputs bits 1-4
1
Disables three-state outputs bits 1-4
0
Enables three-state outputs bits 5-8
1
Disables three-state outputs bits 5-8
0
Enables three-state outputs bits 9-12
1
Disables three-state outputs bits 9-12
MUX ADDRESS OUT
Output of multiplexer address
register 8, 4, 2, 1 natural binary
coding
ANALOG INPUTS
CHANNEL INPUTS
DESCRIPTION
Limit voltage to ±20V beyond
power supplies
BIPOLAR INPUT
For unipolar operation, connect
to pin 39 (S/H OUT). For bipolar
operation, connect to in 40
(+10V OUT)
AMP. IN LOW
AMP. IN HIGH
These pins are direct inputs to the
instrumentation amplifier for external
channel expansion beyond 16SE or
8D channels.
Calibration Procedures
1. Offset and gain adjustments are made by connecting two 20k trim potentiometers as shown in Figure 2.
2. Connect a precision voltage source to pin 4 (CH0 IN). If the HDAS-8 is used,
connect pin 58 (CH0 LOW IN) to analog ground. Ground pin 20 (CLEAR) and
momentarily short pin8 (STROBE). Trigger the A/D by connecting pin 7 (EOC)
to pin 8 (STROBE). Select proper value for RGAIN and RDELAY by referring to
Table 3.
3. Adjust the precision voltage source to the value shown in Table 2 for the
unipolar zero adjustment (ZERO + 1/2LSB)or the bipolar offset adjustment
(–FS + 1/2LSB). Adjust the offset trim potentiometer so that the output code
flickers equally between 0000 0000 0000 and 0000 0000 0001.
4. Change the output of the precision voltage source to the value shown in
Table 2 for the unipolar or bipolar gain adjustment (+FS – 1 1/2LSB). Adjust
the gain trim potentiometer so that the output flickers equally between
1111 1111 1110 and 1111 1111 1111.
GAIN
ADJUST
36
37
+15Vdc
20k
OFFSET
ADJUST
20k
–15Vdc
ANALOG OUTPUTS
S/H OUT
Sample/hold output
+10V REFERENCE OUT
Buffered +10V reference output
ADJUSTMENT PINS
ANALOG SIGNAL COMMON
Low level analog signal return
GAIN ADJUSTMENT
External gain adjustment.
See calibration instructions.
OFFSET ADJUSTMENT
External offset adjustment.
See calibration instructions.
RGAIN
Optional gain selection point. Factory
adjusted for G = 1 when left open.
RDELAY
Optional acquisition time adjustment
when connected to +5V. Factory
adjusted for 9μs. Must be connected
to +5V either directly or through a
resistor.
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Figure 2. External Adjustment
GENERAL OPERATION
The HDAS devices accept either 16 single-ended or 8 differential input signals.
For single-ended circuits, the AMP INLOW (pin 50) input to the instrumentation
amplifier must terminate at ANALOG SIGNAL COMMON (pin 41). For differential
circuits, both the HIGH and LOW signal inputs must terminate externally for
each channel. Tie unused channels to the ANALOG SIGNAL COMMON (pin 41).
To obtain additional channels, connect external multiplexers to the AMP IN
HIGH (pin 49) and AMP IN LOW (pin 50). Using this scheme, the HDAS-16 can
provide 32 single-ended expansion channels while the HDAS-8 can provide
up to 16 differential expansion channels. MPS’s MX Series multiplexers are
recommended.
Technical enquiries email: [email protected], tel: +1 508 339 3000
MDC_HDAS-16/8.B01 Page 4 of 7
HDAS-16, HDAS-8
The acquisition time is the amount of time the multiplexer, instrumentation amplifier, and sample/hold require to settle within a specified range of
accuracy after STROBE (pin 8)goes low. The acquisition time period can be
observed by measuring how long EOC is low after the falling edge of STROBE
(see Figure 4). For higher gains, increase the acquisition time. Do this by connecting a resistor from RDELAY (pin 6) to +5V (pin 18). An external resistor,
RGAIN, can be added to increase the gain value. The gain is equal to 1 without
an RGAIN resistor. Table 3 refers to the appropriate RDELAY and RGAIN resistors required for various gains.
driving the EOC output high.The HDAS devices can be configured for either
bipolar or unipolar operation (see Table 2). The conversion is complete within a
maximum of 10 microseconds. The EOC now returns low, the data is valid and
sent to the three-state output buffers.The sample/hold amplifier is now ready
to acquire new data.The next falling edge of the STROBE pulse repeats the
process for the next conversion.
Multiplexer Addressing
The HDAS devices can be configured in either random orsequential addressing modes. Refer to Table 5 and the subsequent descriptions. The number of
channels sequentially addressed can be truncated using the MUX ADDRESS
OUT(pins 9, 10, 11 and 12) and appropriate decoding circuitry forthe highest
channel desired. The decoding circuit can drive the CLEAR (pin 20) function low
to reset the addressing to channel 0.
The HDAS devices enter the hold mode and are ready for conversion as
soon as the one-shot (controling acquisition time) times out. An internal clock
is gated ON, and a start-convert pulse is sent to the 12-bit A/D converter,
Table 3. Input Range Parameters (Typical)
±10V
±5V
±2.5V
±1V
±200mV
±100mV
±50mV
GAIN
RGAIN (7 )
1
2
4
10
50
100
200
OPEN
20.0k
6.667k
2.222k
408.2
202.0
100.5
Notes
RGAIN (Ω) =
20,000
(GAIN – 1)
RDELAY (Ω) = [Total Acquisition Delay (μs) x 1000] – 9000
RDELAY (7 ) 0
0
0
0
(SHORT)
(SHORT)
(SHORT)
(SHORT)
7k
21k
51k
66.6kHz
66.6kHz
66.6kHz
66.6kHz
40.0kHz
25.6kHz
14.5kHz
±0.009
±0.009
±0.009
±0.009
±0.010
±0.011
±0.016
Table 5. Mux Channel Addressing
PIN
STRAIGHT BINARY
INPUT
0 to +10V
0 to +5V
MSB
+FS – 1LSB
+1/2FS
+1LSB
ZERO
+9.9976
+5.0000
+0.0024
0.0000
+4.9988
+2.5000
+0.0012
0.0000
1111
1000
0000
0000
BIPOLAR
SYSTEM ACCURACY
(% OF FSR)
The analog input range to the A/D converter is 0 to +10V for unipolar signals
and ±10V for bipolar signals.
Full scale can be accommodated for analog signal ranges of ±50mV to ±10V.
For gains between 1 and 10, RDELAY (pin 6) must be shorted to +5V (pin
18).
Throughput period equals acquisition and settling delay, plus A/D conversion
period (10 microseconds maximum).
Table 4. Output Coding
UNIPOLAR
THROUGHPUT LSB
1111
0000
0000
0000
1111
0000
0001
0000
OFFSET BINARY*
INPUT
±10V
±5V
MSB
+FS – 1LSB
+1/2FS
+1LSB
ZERO
–FS + 1LSB
–FS
+9.9951
+5.0000
+0.0049
0.0000
–9.9951
–10.000
+4.9976
+2.5000
+0.0024
0.0000
–4.9976
–5.0000
1111
1100
1000
1000
0000
0000
LSB
1111
0000
0000
0000
0000
0000
1111
0000
0001
0000
0001
0000
* For 2’s complement coding, add an inverter to the MSB line.
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MUX ADDRESS
5
MUX
ENABLE
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
13
14
15
16
RA8
X
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
RA4
X
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
RA2
X
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
RA1
X
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
ON
CHANNEL
INPUT
RANGE NONE
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
HDAS-8
(3-BIT
ADDRESS)
HDAS-16
(4-BIT
ADDRESS)
Technical enquiries email: [email protected], tel: +1 508 339 3000
MDC_HDAS-16/8.B01 Page 5 of 7
HDAS-16, HDAS-8
Random Addressing
Set pin 19 (LOAD) to logic 0. The next falling edge of STROBE will load the MUX
CHANNEL ADDRESS present on pin 13 to pin 16. Digital address inputs must be
stable 20ns before andafter falling edge of the STROBE pulse.
Free Running Sequential Addressing
Set pin 19 (LOAD) and pin 20 (CLEAR) to logic 1 or leave open. Connect pin 7
(EOC) to pin 8 (STROBE). The fallingedge of EOC will increment channel
address. This means thatwhen the EOC is low, the digital output data is valid
for theprevious channel (CHn – 1) rather than the channel indicated on
MUX ADDRESS OUTPUT. The HDAS will continually scan all channels.
Example: CH4 has been addressed and a conversion takes place. The EOC
goes low. That channel’s (CH4’s) data becomes valid, but MUX ADDRESS
OUTPUT is now CH5.
tents of the address counter to be incremented by one, followed by an
A/D conversion in 9 microseconds.
Input Voltage Protection
As shown in Figure 3, the multiplexer has reversed biased diodes which
protect the input channels from being damaged by overvoltage signals. The
HDAS input channels areprotected up to 20V beyond the supplies and can be
increasedby adding series resistors (Ri) to each channel. The input resistor
must limit the current flowing through the protection diodes to 10mA.
The value of Ri for a specific voltage protection range (Vp) can be calculated
by the following formula:
Vp = (Rsignal + Ri + RON) (10mA)where RON = 2k
NOTE: Increased input series resistance will increase multiplexer settling
time significantly.
Triggered Sequential Addressing
Set pin 19 (LOAD) and pin 20 (CLEAR) to logic 1 or leaveopen. Apply a falling
edge trigger pulse to pin 8 (STROBE).This negative transition causes the con-
+15V
Ri
CHn
INPUT
10pF
R1
R2
1k
1k
100pF
INST.
AMP.
RSIGNAL
~ SIGNAL
–15V
Figure 3. Multiplexer Equivalent Circuit
40nsec min.
STROBE
EXTERNAL
STROBE PULSE
40nsec min.
9μsec typ.
6μsec typ.
CH0
DATA VALID
CH12
DATA VALID
EOC
ACQUISITION CONVERSION ACQUISITION CONVERSION
CH0
CH0
CH1
CH1
ACQUISITION CONVERSION
CH12
CH12
LOAD
t2
t1,t2 ≥50nsec
t1
CLEAR
t ≥ 20nsec min.
RA8
RA4
RA2
RA1
CH12
SELECTED
A8
40nsec min.
A4
A2
A1
40nsec min.
CH0 ADDRESSED
MODE
CLEAR
CH1 ADDRESSED
CH2 ADDRESSED
SEQUENTIAL (EOC TIED TO STROBE)
CH12 ADDRESSED
RANDOM
CODE
MAY CHANGE
OR DON'T CARE
Figure 4. HDAS Timing Diagram
www.murata-ps.com
Technical enquiries email: [email protected], tel: +1 508 339 3000
MDC_HDAS-16/8.B01 Page 6 of 7
HDAS-16, HDAS-8
Mechnical Dimensions
INCHES (mm)
0.150
(3.810)
2.325
(59.055)
1
Dimension Tolerances (unless otherwise indicated):
2 place decimal (.XX) ±0.010 (±0.254)
3 place decimal (.XXX) ±0.005 (±0.127)
21
Lead Material: Kovar alloy
62
Lead Finish: 50 microinches (minimum) gold plating
over 100 microinches (nominal) nickel plating
1.100 1.415 MAX.
(27.940)
(35.94)
52
32
0.100 TYP.
(2.540)
0.235 MAX.
(5.969)
0.190 MAX.
(4.826)
0.150
(3.810)
2.00 ±0.008
(50.800)
0.020 ±0.002
(0.508)
0.040
(1.016)
0.200 MAX.
(5.080)
0.150
(3.810)
SEATING
PLANE
0.025 ±0.010
(0.635)
1.100 ±0.008
(27.940)
0.150
(3.810)
Ordering Information
Model No.
Operating Temp. Range
HDAS-16MC
0 to +70°C
HDAS-16MM
–55 to +125°C
HDAS-16/883
–55 to +125°C
HDAS-8MC
0 to +70°C
HDAS-8MM
–55 to +125°C
HDAS-8/883
–55 to +125°C
ISO 9001
R E G I S T E R E D
Receptacle for PC board mounting can be ordered through AMP Inc.,
Part #3-331272-4 (Component Lead Spring Socket), 62 required.
Contact Murata Power Solutions for MIL-STD-883 product specifications.
USA:
Tucson (AZ), Tel: (800) 547 2537, email: [email protected]
Canada:
Toronto, Tel: (866) 740 1232, email: [email protected]
UK:
Milton Keynes, Tel: +44 (0)1908 615232, email: [email protected]
France:
Montigny Le Bretonneux, Tel: +33 (0)1 34 60 01 01, email: [email protected]
Germany: München, Tel: +49 (0)89-544334-0, email: [email protected]
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356
www.murata-ps.com
ISO 9001 REGISTERED
email: [email protected]
3/12/08
Japan:
Tokyo, Tel: 3-3779-1031, email: [email protected]
Osaka, Tel: 6-6354-2025, email: [email protected]
Website: www.murata-ps.jp
China:
Shanghai, Tel: +86 215 027 3678, email: [email protected]
Guangzhou, Tel: +86 208 221 8066, email: [email protected]
Murata Power Solutions, Inc. 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.
© 2008 Murata Power Solutions, Inc.
www.murata-ps.com
Technical enquiries email: [email protected], tel: +1 508 339 3000
MDC_HDAS-16/8.B01 Page 7 of 7