HDAS8-16 [MURATA]
12-Bit, 50kHz, Complete Data Acquisition Systems; 12位, 50kHz的,完整的数据采集系统型号: | HDAS8-16 |
厂家: | muRata |
描述: | 12-Bit, 50kHz, Complete Data Acquisition Systems |
文件: | 总7页 (文件大小:216K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
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
Internal HDAS circuitry includes:
Using thin and thick-film hybrid technology, Murata Power Solutions offers
complete low-cost data acquisition systems with superior performance and
reliability.
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
Analog input multiplexer (16 S.E. or 8 diff.)
Resistor-programmable instrumentation amplifier
Sample-and-hold circuit complete with MOS hold capacitor
10 Volt buffered reference
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.
12-bit A/D converter with three-state outputs and control logic
Internal channel address sequencing is automatic after each conversion,
or the user may supply external channel addresses.
5
49 50
48 47
45
46 39
40 38 36 37
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
7
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
4
3
2
1
BIT 1
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
(MSB)
THREE
STATE
I/A
S/H
62
61
60
59
58
57
56
55
54
53
52
51
16 CHANNEL
SINGLE ENDED
OR
8 CHANNEL
DIFFERENTIAL
ANALOG
12-BIT
A/D
CONVERTER
THREE
STATE
(HOLD)
MULTIPLEXER
THREE
STATE
(START)
MUX
ADDRESS
REGISTER
CONTROL
LOGIC
12 11 10
MUX
9
6
8
19
16 15 1413 20 41
44 42
43 18 17
MUX
ADDRESS IN
ADDRESS OUT
Typical topology is shown.
Figure 1. Functional Block Diagram
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MDC_HDAS-16/8.B01 Page 1 of 7
HDAS-16, HDAS-8
ABSOLUTE MAXIMUM RATINGS
PERFORMANCE (cont.)
MIN.
TYP.
MAX.
UNITS
PARAMETERS
MIN.
TYP.
MAX.
UNITS
Unipolar Zero Error
+25°Cꢀꢁ
+15V Supply (pin 43)
–15V Supply (pin 44)
+5V Supply (pin 18)
AnalogInputs ꢃ
DigitalInputs
ThermalResistances:
Junction-Case
Case-Ambient
–±05
+±05
–±05
–35
—
—
—
—
—
+.8
–.8
+7
+35
+7
Volts
Volts
Volts
Volts
Volts
—
—
—
—
±±0.
±±03
%FSR
%FSR
–55 to +.25°C
Bipolar Zero Error
+25°C ꢁ
—
—
—
—
±±0.
±±03
%FSR
%FSR
–±05
–55 to +.25°C
Bipolar Offset Error
+25°C ꢁ
—
—
—
—
—
—
—
—
.5
.5
3±
3±±
°C/Watt
°C/Watt
°C/Watt
°C
—
—
—
—
±±0.
±±03
%FSR
%FSR
Junction-Ambient
Lead Temp. (10 seconds)
–55 to +.25°C
Gain Error
+25°Cꢀꢁ
—
—
—
—
±±02
±±03
%
%
–55 to +.25°C
FUNCTIONAL SPECIFICATIONS
(The following specifications apply over the operating temperature range and power
supply range unless otherwise indicated0)
DYNAMIC CHARACTERISTICS
Acquisition Time, Gain = 1
+25°C
ANALOG INPUTS
MIN.
TYP.
MAX.
UNITS
—
—
—
—
—
—
9
.±
.5
μs
μs
–55 to +.25°C
ApertureDelayTime
Aperture Uncertainty
S/HDroopRate
Feedthrough
—
—
—
—
—
Signal Range, Unipolar
Gain = .
5±±
.
±.
ns
±
—
—
+.±
+5±
Volts
mV
ns
μV/μs
%
Gain = 2±±
—
Signal Range, Bipolar
Gain = .
±±0±.
–.±
–5±
—
—
+.±
+5±
Volts
mV
A/DConversionTime
+25°C
Gain = 2±±
—
—
6
8
μs
μs
Input Gain Equation ꢄ
Gain Equation Error
InstrumentationAmplifier
InputImpedance
Gain = . + (2±kΩ/RGAIN)
–55 to +.25°C
ThroughputRate
+25°C
—
.±
—
—
±±0.
%
Ohms
pA
5±
33
66
—
—
—
kHz
kHz
8
.±
.2
.±
—
–55 to +.25°C
Input Bias Current:
+25°C
—
—
—
±25±
DIGITAL INPUTS
Logic Levels
(Pins 8, .3–.6, .9–2., 26, 3.)
–55 to +.25°C
Doubles every .±°C
Input Offset Current:
+25°C
—
±.
nA
Logic .
Logic ±
+20±
±
—
—
+505
+±08
Volts
Volts
–55 to +.25°C
Doubles every .±°C
Multiplexer
(Pin 5)
Channel ON Resistance
Channel OFF Input Leakage
Channel OFF Output Leakage
Channel ON Leakage
Input Capacitance
HDAS-.6, Channel ON
HDAS-8, ChannelON
+25°C, Channel OFF
InputOffsetVoltage
Gain = 1, +25°C
—
—
—
—
—
±3±
±.
2
kΩ
pA
nA
pA
Logic .
+40±
±
—
—
+505
+±08
Volts
Volts
—
—
—
Logic ±
Logic Loading
(Pins 5, 8, .3–.6, .9–2.,
26, 3.)
±.±±
—
—
—
.±±
5±
5
—
—
—
pF
pF
pF
Logic .
—
—
2±
—
4±
—
—
—
2±
—
±.±
±.±
—
μA
μA
ns
Logic ±
Multiplexer Address Set-upTime
ENABLEtoDataValidDelay
STROBE ꢂꢀ
3±
ns
—
—
—
±2
mV
—
ns
–55 to +.25°C (max0)
Gain = 200, +25°C
–55 to +.25°C (max0)
Common Mode Range
CMRR, Gain = 1, at 60Hz
(±3ppm/°C x Gain) ±2±ppm/°C
±.±±
(±3ppm/°C x Gain) ±2±ppm/°C
OUTPUTS
—
mV
LogicLevels (OutputData)
Logic .
+204
+205
—
—
—
—
—
—
Volts
Volts
Volts
±.±
7±
—
—
—
Volts
dB
Logic . (pin 7)
Logic ±
82
+±04
Input Voltage Noise, Gain = 1
(Referred to input)
—
—
.5±
—
2±±
–8±
μVrms
dB
(Pins 9, .±, .., and .2)
Logic .
Channel Crosstalk
+205
—
—
—
—
Volts
Volts
Logic ±
Logic Loading
Logic .
+±04
PERFORMANCE
Resolution
.2
—
—
Bits
—
—
—
—
–4±±
+4
μA
mA
IntegralNonlinearity
± to +7±°C
Logic ±
—
—
—
—
±.
±.
LSB
LSB
Internal Reference:
Voltage, +25°C
Drift
–55 to +.25°C
+9099
—
+.±0±±
—
+.±0±.
±2±
.
Volts
ppm/°C
mA
Differential Nonlinearity
± to +7±°C
—
—
—
—
±.
±.
LSB
LSB
External Current
Output Data Coding
—
—
–55 to +.25°C
Straight binary (unipolar) or offset binary (bipolar)
No Missing Codes
Over the operating temperature range
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MDC_HDAS-16/8.B01 Page 2 of 7
HDAS-16, HDAS-8
FUNCTIONAL SPECIFICATIONS (Continued)
INPUT/OUTPUT CONNECTIONS
POWER REQUIREMENTS
MIN.
TYP.
MAX.
UNITS
PIN NO.
HDAS-16
HDAS-8
PowerSupplyRanges
+.5VSupply
1
CH3 IN
CH2 IN
CH1 IN
CH0 IN
MUX ENABLE
RDELAY
EOC
CH3 HIGH IN
+.405
–.405
+4075
+.50±
–.50±
+50±
+.505
–.505
+5025
Volts
Volts
Volts
2
CH2 HIGH IN
3
CH1 HIGH IN
CH0 HIGH IN
–.5VSupply
4
+5VSuppy
5
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
PowerSupplyCurrents
+.5VSupply
6
—
—
—
—
—
—
—
—
+33
–3±
+.5
.025
mA
mA
7
–.5VSupply
8
STROBE
A8
+5VSuppy
mA
9
MULTIPLEXER
ADDRESS
OUT
PowerDissipation
Watts
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
A4
A2
PHYSICAL/ENVIRONMENTAL
A1
Operating Temp. Range, Case
MC Models
RA8
MULTIPLEXER
ADDRESS
IN
±
—
—
—
+7±
+.25
+.5±
°C
°C
°C
RA4
MM/883 Models
–55
–65
RA2
StorageTemperatureRange
Weight
PackageType
RA1
.04 ounces (3907 grams)
62-pin cermanic DIP
DIGITAL COMMON
+5V SUPPLY
LOAD
Footnotes:
CLEAR
ꢃ Analog inputs will withstand ±35V with power on0 If the power is off, the maximum
safe input (no damage) is ±2±V0
ENABLE (Bits 9–12)
BIT 12 (LSB)
BIT 11
ꢄ The gain equation error is guaranteed before external trimming and applies at
gains less than 5±0 This error increases at gains over 5±0
BIT 10
BIT 9
ꢁ Adjustable to zero0
ENABLE (Bits 5–8)
BIT 8
ꢂ STROBE pulse width must be less than EOC period to achieve maximum
throughput rate0
BIT 7
BIT 6
BIT 5
ENABLE (Bits 1–4)
BIT 4
TECHNICAL NOTES
BIT 3
BIT 2
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 initial-
ized. 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 neces-
sary, fabricate the gain resistor from a precision metal-film type in series
with a low value trim resistor or potentiometer. The total resistor tempera-
ture 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).
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 ꢃ
AMP. IN LOW ꢃ
CH15 IN
*
*
*
*
*
*
*
CH7 LOW IN
CH6 LOW IN
CH5 LOW IN
CH4 LOW IN
CH3 LOW IN
CH2 LOW IN
CH1 LOW IN
CH0 LOW IN
CH7 HIGH IN
CH6 HIGH IN
CH5 HIGH IN
CH4 HIGH IN
CH14 IN
CH13 IN
CH12 IN
CH11 IN
CH10 IN
CH9 IN
CH8 IN
CH7 IN
CH6 IN
CH5 IN
CH4 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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MDC_HDAS-16/8.B01 Page 3 of 7
HDAS-16, HDAS-8
Table 1. Description of Pin Functions
Table2. CalibrationTable
LOGIC
FUNCTION
STATE DESCRIPTION
UNIPOLAR RANGE
ADJUST
INPUT VOLTAGE
DIGITAL INPUTS
0 to +5V
ZERO
GAIN
+0.6mV
+4.9982V
STROBE
1 to 0 Initiates acquisition and conversion
of analog signal
0 to +10V
ZERO
GAIN
+1.2mV
+9.9963V
LOAD
0
Random address mode initiated on
falling edge of STROBE
BIPOLAR RANGE
1
0
Sequential address mode
2.5V
OFFSET
GAIN
–2.4994V
+2.4982V
CLEAR
Allows next STROBE pulse to reset
MULTIPLEXER ADDRESS to CH0
overriding LOAD COMMAND
5V
OFFSET
GAIN
–4.9988V
+4.9963V
MUX ENABLE
0
1
Disables internal multiplexer
Enables internal multiplexer
10V
OFFSET
GAIN
–9.9976V
+9.9927V
MUX ADDRESS IN
Selects channel for random
address mode 8, 4, 2, 1
natural binary coding
Calibration Procedures
1. Offset and gain adjustments are made by connecting two 20k trim potenti-
ometers as shown in Figure 2.
DIGITAL OUTPUTS
EOC (STATUS)
0
1
0
1
0
1
0
1
Conversion complete
Conversion in process
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.
ENABLE (1–4)
Enables three-state outputs bits 1-4
Disablesthree-stateoutputsbits1-4
Enables three-state outputs bits 5-8
Disablesthree-stateoutputsbits5-8
Enables three-state outputs bits 9-12
Disables three-state outputs bits 9-12
ENABLE (5–8)
ENABLE (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)
GAIN
+15Vdc
ADJUST
36
20k
AMP. IN LOW
AMP. IN HIGH
These pins are direct inputs to the
instrumentation amplifier for external
channel expansion beyond 16SE or
8D channels.
37
20k
OFFSET
ADJUST
–15Vdc
ANALOG OUTPUTS
S/H OUT
Figure 2. External Adjustment
Sample/hold output
+10V REFERENCE OUT
ADJUSTMENT PINS
ANALOG SIGNAL COMMON Low level analog signal return
Buffered +10V reference output
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.
GAIN ADJUSTMENT
OFFSET ADJUSTMENT
RGAIN
External gain adjustment.
See calibration instructions.
External offset adjustment.
See calibration instructions.
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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MDC_HDAS-16/8.B01 Page 4 of 7
HDAS-16, HDAS-8
The acquisition time is the amount of time the multiplexer, instrumenta-
tion 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 con-
necting 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 resis-
tors 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 address-
ing 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,
Table3. InputRangeParameters(Typical)
INPUT
SYSTEM ACCURACY
(% OF FSR)
ꢃꢀꢄ
RANGE
GAIN
RGAIN (7)
RDELAY (7) ꢁ
THROUGHPUT ꢂ
10V
5V
2.5V
1
2
4
10
50
100
200
OPEN
20.0k
6.667k
2.222k
408.2
202.0
100.5
0 (SHORT)
0 (SHORT)
0 (SHORT)
0 (SHORT)
7k
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
1V
200mV
100mV
50mV
21k
51k
Notes
RGAIN (Ω) =
ꢃ The analog input range to the A/D converter is 0 to +10V for unipolar signals
and 10V for bipolar signals.
20,000
(GAIN – 1)
ꢄ 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).
RDELAY (Ω) = [Total Acquisition Delay (μs) x 1000] – 9000
ꢂ Throughput period equals acquisition and settling delay, plus A/D conversion
period (10 microseconds maximum).
Table 4. Output Coding
Table 5. Mux Channel Addressing
PIN
UNIPOLAR
0 to +10V
STRAIGHT BINARY
MSB LSB
MUX ADDRESS
INPUT
0 to +5V
5
13
14
15
16
MUX
+FS – 1LSB
+1/2FS
+1LSB
+9.9976
+5.0000
+0.0024
0.0000
+4.9988
+2.5000
+0.0012
0.0000
1111 1111 1111
1000 0000 0000
0000 0000 0001
0000 0000 0000
ENABLE RA8
RA4
RA2 RA1
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
X
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
X
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
X
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
X
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
NONE
0
1
ZERO
2
3
4
5
HDAS-8
(3-BIT
BIPOLAR
10V
OFFSET BINARY*
ADDRESS)
INPUT
5V
MSB
LSB
6
7
8
9
+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 1111 1111
1100 0000 0000
1000 0000 0001
1000 0000 0000
0000 0000 0001
0000 0000 0000
10
11
12
13
14
15
HDAS-16
(4-BIT
ADDRESS)
* For 2’s complement coding, add an inverter to the MSB line.
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MDC_HDAS-16/8.B01 Page 5 of 7
HDAS-16, HDAS-8
Random Addressing
tents of the address counter to be incremented by one, followed by an
A/D conversion in 9 microseconds.
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.
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.
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.
The value of Ri for a specific voltage protection range (Vp) can be calculated
by the following formula:
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.
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-
CHn
INPUT
Ri
INST.
AMP.
R
SIGNAL
~ SIGNAL
Figure 3. Multiplexer Equivalent Circuit
40nsec min.
STROBE
EXTERNAL
STROBE PULSE
40nsecmin.
9μsec typ.
6μsec typ.
CH0
DATA VALID
CH12
DATA VALID
EOC
ACQUISITION CONVERSION ACQUISITION CONVERSION
CH0 CH0 CH1 CH1
ACQUISITION CONVERSION
CH12
CH12
LOAD
t
2
t
t ,
t
1 2
≥50nsec
1
CLEAR
t ≥ 20nsec min.
RA8
RA4
RA2
RA1
A8
CH12
SELECTED
40nsec min.
A4
A2
A1
40nsec min.
CH1 ADDRESSED
CH0 ADDRESSED
CLEAR
CH2 ADDRESSED
CH12 ADDRESSED
CODE
MODE
SEQUENTIAL (EOC TIED TO STROBE)
RANDOM
MAY CHANGE
OR DON'T CARE
Figure 4. HDAS Timing Diagram
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MDC_HDAS-16/8.B01 Page 6 of 7
HDAS-16, HDAS-8
Mechnical Dimensions
INCHES (mm)
0.150
(3.810)
2.325
Dimension Tolerances (unless otherwise indicated):
(59.055)
2 place decimal (.XX) 0.010 ( 0.254)
3 place decimal (.XXX) 0.005 ( 0.127)
1
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)
0.150
(3.810)
0.235 MAX.
(5.969)
2.00 0.008
(50.800)
0.200 MAX.
(5.080)
0.190 MAX.
(4.826)
0.020 0.002
(0.508)
0.040
(1.016)
0.150
1.100 0.008
(27.940)
0.150
(3.810)
(3.810)
SEATING
PLANE
0.025 0.010
(0.635)
Ordering Information
Model No.
Operating Temp. Range
0 to +70°C
HDAS-16MC
HDAS-16MM
HDAS-16/883
ISO 9001
R
E G I S T E R E D
–55 to +125°C
–55 to +125°C
HDAS-8MC
HDAS-8MM
HDAS-8/883
0 to +70°C
–55 to +125°C
–55 to +125°C
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:
Canada: Toronto, Tel: (866) 740 1232, email: toronto@murata-ps.com
UK: Milton Keynes, Tel: +44 (0)1908 615232, email: mk@murata-ps.com
Tucson (AZ), Tel: (800) 547 2537, email: sales@murata-ps.com
France: Montigny Le Bretonneux, Tel: +33 (0)1 34 60 01 01, email: france@murata-ps.com
Germany: München, Tel: +49 (0)89-544334-0, email: ped.munich@murata-ps.com
Murata Power Solutions, Inc.
Japan:
Tokyo, Tel: 3-3779-1031, email: sales_tokyo@murata-ps.com
Osaka, Tel: 6-6354-2025, email: sales_osaka@murata-ps.com
Website: www.murata-ps.jp
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 email: sales@murata-ps.com
ISO 9001 REGISTERED
China:
Shanghai, Tel: +86 215 027 3678, email: shanghai@murata-ps.com
Guangzhou, Tel: +86 208 221 8066, email: guangzhou@murata-ps.com
3/12/08
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: sales@murata-ps.com, tel: +1 508 339 3000
MDC_HDAS-16/8.B01 Page 7 of 7
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