Figure 1. Functional Block Diagram
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
Available in SMT or DIP packages
Typical topology is shown.
GENERAL DESCRIPTION
Using thin and thick-fi lm hybrid technology, DATEL offers complete low-cost
data acquisition systems with superior performance and reliability.
The HDAS-8 (with 8 differential input channels) and the HDAS-16 (with
16single-ended input channels) are complete, high-performance, 12-bit
data acquisition systems in 62-pin SMT or DIP packages. Each HDAS may
be expanded up to 32 single-ended or 16 differential channels by adding
externalmultiplexers.
Internal channel address sequencing is automatic after each conversion,
or the user may supply external channel addresses.
Internal HDAS circuitry includes:
Analog input multiplexer (16 S.E. or 8 diff.)
Resistor-programmable instrumentation amplifi er
Sample-and-hold circuit complete with MOS hold capacitor
10 Volt buffered reference
12-bit A/D converter with three-state outputs and control logic
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
62
61
60
59
58
57
56
55
54
53
52
51
39 38 374045 36
MUX ENABLE
94058474546
AMP IN HI
AMP IN LO
RGAIN HI
RGAIN LO
ANA SIG COM
ANA SIG COM
S/H OUT
+10V REF OUT
BIPOLAR INPUT
GAIN ADJUST
OFFSET ADJUS
T
16 CHANNEL
SINGLE ENDED
OR
8 CHANNEL
DIFFERENTIAL
ANALOG
MULTIPLEXER
12-BIT
A/D
CONVERTER
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
7
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
THREE STATE OUTPUT DATA
(BUFFERED)
11 1012 15 17169
A1
MUX
ADDRESS OUT
RDELAY
ANA SIG COM
CLEAR
20
–15V SUPPLY
6 8 19 1413 41 44 42 43 18
A2
A4
A8
STROBE
LOAD
RA1
RA2
RA4
RA8
MUX
ADDRESS IN
ANA PWR COM
+5V SUPPLY
DIG COM
+15V SUPPLY
CONTROL
LOGIC MUX
ADDRESS
REGISTER
(HOLD)
I/A S/H
THREE
STATE
THREE
STATE
THREE
STATE
(START)
®®
DATEL • 11 Cabot Boulevard, Mansfi eld, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com
HDAS-16, HDAS-8
12-Bit, 50kHz, Complete Data Acquisition Systems
06 May 2013 MDA_HDAS-16/8.C02 Page 1 of 8
FUNCTIONAL SPECIFICATIONS
(The following specifi cations apply over the operating temperature range and power
supply range unless otherwise indicated.)
ABSOLUTE MAXIMUM RATINGS
PARAMETERS MIN. TYP. MAX. UNITS
+15V Supply (pin 43) –0.5 — +18 Volts
–15V Supply (pin 44) +0.5 — –18 Volts
+5V Supply (pin 18) –0.5 — +7 Volts
Analog Inputs –35 — +35 Volts
Digital Inputs –0.5 — +7 Volts
Thermal Resistances:
Junction-Case — — 15 °C/Watt
Case-Ambient — — 15 °C/Watt
Junction-Ambient — — 30 °C/Watt
Lead Temp. (10 seconds) — — 300 °C
ANALOG INPUTS MIN. TYP. MAX. UNITS
Signal Range, Unipolar
Gain = 1 0 — +10 Volts
Gain = 200 — — +50 mV
Signal Range, Bipolar
Gain = 1 –10 — +10 Volts
Gain = 200 –50 — +50 mV
Input Gain Equation Gain = 1 + (20kΩ/RGAIN)
Gain Equation Error — — ±0.1 %
Instrumentation Amplifi er
Input Impedance 108 1012 — Ohms
Input Bias Current:
+25°C — — ±250 pA
–55 to +125°C Doubles every 10°C
Input Offset Current:
+25°C — — ±1 nA
–55 to +125°C Doubles every 10°C
Multiplexer
Channel ON Resistance — — 2 kΩ
Channel OFF Input Leakage — ±30 — pA
Channel OFF Output Leakage — ±1 — nA
Channel ON Leakage — ±100 — pA
Input Capacitance
HDAS-16, Channel ON — 100 — pF
HDAS-8, Channel ON — 50 — pF
+25°C, Channel OFF — 5 — pF
Input Offset Voltage
Gain = 1, +25°C — — ±2 mV
–55 to +125°C (max.) (±3ppm/°C x Gain) ±20ppm/°C
Gain = 1000, +25°C — — ±100 mV
–55 to +125°C (max.) (±3ppm/°C x Gain) ±20ppm/°C
Common Mode Range ±10 — — Volts
CMRR, Gain = 1, at 60Hz 70 82 — dB
Input Voltage Noise, Gain = 1
(Referred to input) — 150 200 μVrms
Channel Crosstalk — — –80 dB
PERFORMANCE
Resolution 12 — — Bits
Integral Nonlinearity
0 to +70°C — — ±1 LSB
–40 to +100°C — — ±1 LSB
–55 to +125°C — — ±1 LSB
Differential Nonlinearity
0 to +70°C — — ±1 LSB
–40 to +100°C — — ±1 LSB
–55 to +125°C — — ±1 LSB
No Missing Codes Over the operating temperature range
PERFORMANCE (CONT.) MIN. TYP. MAX. UNITS
Unipolar Zero Error
+25°C — — ±0.1 %FSR
–40 to +100°C — — ±0.25 % FSR
–55 to +125°C — — ±0.3 %FSR
Bipolar Zero Error
+25°C — — ±0.1 %FSR
–40 to +100°C — — ±0.25 % FSR
–55 to +125°C — — ±0.3 %FSR
Bipolar Offset Error
+25°C — — ±0.1 %FSR
–40 to +100°C — — ±0.25 % FSR
–55 to +125°C — — ±0.3 %FSR
Gain Error
+25°C — — ±0.2 %
–40 to +100°C — — ±0.3 % FSR
–55 to +125°C — — ±0.3 %
DYNAMIC CHARACTERISTICS
Acquisition Time, Gain = 1
+25°C — 9 10 μs
–40 to +100°C — — 15 μs
–55 to +125°C — — 15 μs
Aperture Delay Time — — 500 ns
Aperture Uncertainty — — 1 ns
S/H Droop Rate — — ±1 μV/μs
Feedthrough — — ±0.01 %
A/D Conversion Time
+25°C — 6 8 μs
–40 to +100°C — — 10 μs
–55 to +125°C — — 10 μs
Throughput Rate
+25°C 50 66 — kHz
–40 to +100°C 33 — — kHz
–55 to +125°C 33 — — kHz
DIGITAL INPUTS
Logic Levels
(Pins 8, 13–16, 19–21, 26, 31)
Logic 1 +2.0 — +5.5 Volts
Logic 0 0 — +0.8 Volts
(Pin 5)
Logic 1 +4.0 — +5.5 Volts
Logic 0 0 — +0.8 Volts
Logic Loading
(Pins 5, 8, 13–16, 19–21, 26, 31)
Logic 1 — — ±10 μA
Logic 0 — — ±10 μA
Multiplexer Address Set-upTime 20 — — ns
ENABLE to Data Valid Delay — 20 30 ns
STROBE 40 — — n
OUTPUTS
Logic Levels (Output Data)
Logic 1 +2.4 — — Volts
Logic 1 (pin 7) +2.5 — — Volts
Logic 0 — — +0.4 Volts
(Pins 9, 10, 11, and 12)
Logic 1 +2.5 — — Volts
Logic 0 — — +0.4 Volts
Logic Loading
Logic 1 — — –400 μA
Logic 0 — — +4 mA
®®
DATEL • 11 Cabot Boulevard, Mansfi eld, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com
HDAS-16, HDAS-8
12-Bit, 50kHz, Complete Data Acquisition Systems
06 May 2013 MDA_HDAS-16/8.C02 Page 2 of 8
*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.
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 amplifi ers foreach channel. MPS’s AM-551 is
suggested for such amplifi er-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 fi lm-type resistor.
6. RGAIN must be very accurate with low temperature coeffi cients. If neces-
sary, fabricate the gain resistor from a precision metal-fi lm type in series
with a low value trim resistor or potentiometer. The total resistor tempera-
ture coeffi cient 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).
OUTPUTS (CONT.)
Internal Reference:
Voltage, +25°C +9.99 +10.00 +10.01 Volts
Drift — — ±20 ppm/°C
External Current — — 1 mA
Output Data Coding Straight binary (unipolar) or offset binary (bipolar)
POWER REQUIREMENTS MIN. TYP. MAX. UNITS
Power Supply Ranges
+15V Supply +14.25 +15.0 +15.75 Volts
–15V Supply –14.25 –15.0 –15.75 Volts
+5V Supply +4.75 +5.0 +5.25 Volts
Power Supply Currents
+15V Supply — — +33 mA
–15V Supply — — –30 mA
+5V Suppy — — +15 mA
Power Dissipation — — 1.25 Watts
PHYSICAL/ENVIRONMENTAL
Operating Temp. Range, Case
MC Models 0 — +70 °C
ME Models –40 — +100 °C
MM/883 Models –55 — +125 °C
Storage Temperature Range –65 — +150 °C
Weight 1.4 ounces (39.7 grams)
Package Type 62-pin cermanic DIP
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.
PIN NO. HDAS-16 HDAS-8
1 CH3 IN CH3 HIGH IN
2 CH2 IN CH2 HIGH IN
3 CH1 IN CH1 HIGH IN
4 CH0 IN CH0 HIGH IN
5 MUX ENABLE *
6 RDELAY *
7 EOC *
8 STROBE *
9 A8 MULTIPLEXER *
10 A4 ADDRESS *
11 A2 OUT *
12 A1 *
13 RA8 MULTIPLEXER *
14 RA4 ADDRESS *
15 RA2 IN *
16 RA1 *
17 DIGITAL COMMON *
18 +5V SUPPLY *
19 LOAD *
20 CLEAR *
21 ENABLE (Bits 9–12) *
22 BIT 12 (LSB) *
23 BIT 11 *
24 BIT 10 *
25 BIT 9 *
26 ENABLE (Bits 5–8) *
27 BIT 8 *
28 BIT 7 *
29 BIT 6 *
30 BIT 5 *
31 ENABLE (Bits 1–4) *
32 BIT 4 *
33 BIT 3 *
34 BIT 2 *
35 BIT 1 (MSB) *
36 GAIN ADJUST *
37 OFFSET ADJUST *
38 BIPOLAR INPUT *
39 SAMPLE/HOLD OUT *
40 +10V REFERENCE OUT *
41 ANALOG SIGNAL COMMON *
42 ANALOG POWER COMMON *
43 +15V SUPPLY
44 –15V SUPPLY *
45 ANALOG SIGNAL COMMON *
46 ANALOG SIGNAL COMMON *
47 RGAIN LOW *
48 RGAIN HIGH *
49 AMP. IN HIGH  *
50 AMP. IN LOW  *
51 CH15 IN CH7 LOW IN
52 CH14 IN CH6 LOW IN
53 CH13 IN CH5 LOW IN
54 CH12 IN CH4 LOW IN
55 CH11 IN CH3 LOW IN
56 CH10 IN CH2 LOW IN
57 CH9 IN CH1 LOW IN
58 CH8 IN CH0 LOW IN
59 CH7 IN CH7 HIGH IN
60 CH6 IN CH6 HIGH IN
61 CH5 IN CH5 HIGH IN
62 CH4 IN CH4 HIGH IN
®®
DATEL • 11 Cabot Boulevard, Mansfi eld, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com
HDAS-16, HDAS-8
12-Bit, 50kHz, Complete Data Acquisition Systems
06 May 2013 MDA_HDAS-16/8.C02 Page 3 of 8
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
amplifi er 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.
Calibration Procedures
1. Offset and gain adjustments are made by connecting two 20k trim potenti-
ometers 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
fl ickers 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 fl ickers equally between
1111 1111 1110 and 1111 1111 1111.
Table 1. Description of Pin Functions Table 2. Calibration Table
FUNCTION LOGIC STATE DESCRIPTION
DIGITAL INPUTS
STROBE 1 to 0 Initiates acquisition and conversion of
analog signal
LOAD 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 overrid-
ing LOAD COMMAND
MUX ENABLE 0 Disables internal multiplexer
1 Enables internal multiplexer
MUX ADDRESS IN Selects channel for random address
mode 8, 4, 2, 1 natural binary coding
DIGITAL OUTPUTS
EOC (STATUS) 0 Conversion complete
1 Conversion in process
ENABLE (1–4) 0 Enables three-state outputs bits 1-4
1 Disables three-state outputs bits 1-4
ENABLE (5–8) 0 Enables three-state outputs bits 5-8
1 Disables three-state outputs bits 5-8
ENABLE (9–12) 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 DESCRIPTION
CHANNEL INPUTS 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
amplifi er for external channel expansion beyond 16SE
or 8D channels.
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.
UNIPOLAR RANGE ADJUST INPUT VOLTAGE
0 to +5V ZERO
GAIN
+0.6mV
+4.9982V
0 to +10V ZERO
GAIN
+1.2mV
+9.9963V
BIPOLAR RANGE
±2.5V OFFSET
GAIN
–2.4994V
+2.4982V
±5V OFFSET
GAIN
–4.9988V
+4.9963V
±10V OFFSET
GAIN
–9.9976V
+9.9927V
GAIN
ADJUST
36 +15Vdc
OFFSET
ADJUST
20k
20k
37
–15Vdc
®®
DATEL • 11 Cabot Boulevard, Mansfi eld, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com
HDAS-16, HDAS-8
12-Bit, 50kHz, Complete Data Acquisition Systems
06 May 2013 MDA_HDAS-16/8.C02 Page 4 of 8
The acquisition time is the amount of time the multiplexer, instrumenta-
tion amplifi er, and sample/hold require to settle within a specifi ed 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.
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,
driving the EOC output high.The HDAS devices can be confi gured 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 amplifi er 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 confi gured 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.
PIN
ON
CHANNEL
MUX ADDRESS
5 13 14 15 16
MUX
ENABLE RA8 RA4 RA2 RA1
0 X X X X NONE
HDAS-8
(3-BIT
ADDRESS)
1 0 0 0 0 0
1 0 0 0 1 1
1 0 0 1 0 2
1 0 0 1 1 3
1 0 1 0 0 4
1 0 1 0 1 5
1 0 1 1 0 6
1 0 1 1 1 7
1 1 0 0 0 8
HDAS-16
(4-BIT
ADDRESS)
1 1 0 0 1 9
1 1 0 1 0 10
1 1 0 1 1 11
1 1 1 0 0 12
1 1 1 0 1 13
1 1 1 1 0 14
1 1 1 1 1 15
Table 3. Input Range Parameters (Typical)
INPUT
RANGE GAIN RGAIN () RDELAY () THROUGHPUT
SYSTEM ACCURACY
(% OF FSR)
±10V 1 OPEN 0 (SHORT) 66.6kHz ±0.009
±5V 2 20.0k 0 (SHORT) 66.6kHz ±0.009
±2.5V 4 6.667k 0 (SHORT) 66.6kHz ±0.009
±1V 10 2.222k 0 (SHORT) 66.6kHz ±0.009
±200mV 50 408.2 7k 40.0kHz ±0.010
±100mV 100 202.0 21k 25.6kHz ±0.011
±50mV 200 100.5 51k 14.5kHz ±0.016
Notes 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 con-
version period (10 microseconds maximum).
RGAIN (Ω) = 20,000
RDELAY (Ω) = [Total Acquisition Delay (μs) x 1000] – 9000
(GAIN – 1)
Table 5. Mux Channel AddressingTable 4. Output Coding
UNIPOLAR STRAIGHT BINARY
INPUT 0 to +10V 0 to +5V MSB LSB
+FS – 1LSB +9.9976 +4.9988 1111 1111 1111
+1/2FS +5.0000 +2.5000 1000 0000 0000
+1LSB +0.0024 +0.0012 0000 0000 0001
ZERO 0.0000 0.0000 0000 0000 0000
BIPOLAR OFFSET BINARY*
INPUT ±10V ±5V MSB LSB
+FS – 1LSB +9.9951 +4.9976 1111 1111 1111
+1/2FS +5.0000 +2.5000 1100 0000 0000
+1LSB +0.0049 +0.0024 1000 0000 0001
ZERO 0.0000 0.0000 1000 0000 0000
–FS + 1LSB –9.9951 –4.9976 0000 0000 0001
–FS –10.000 –5.0000 0000 0000 0000
* For 2’s complement coding, add an inverter to the MSB line.
®®
DATEL • 11 Cabot Boulevard, Mansfi eld, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com
HDAS-16, HDAS-8
12-Bit, 50kHz, Complete Data Acquisition Systems
06 May 2013 MDA_HDAS-16/8.C02 Page 5 of 8
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 fl owing through the protection diodes to 10mA.
The value of Ri for a specifi c 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 signifi cantly.
Figure 3. Multiplexer Equivalent Circuit
Figure 4. HDAS Timing Diagram
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 pin7
(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.
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
1k 1k
R1
+15V
–15V
100pF10pF
Ri
R
SIGNAL
SIGNAL
~
INST.
AMP.
STROBE
LOAD
40nsec min.
EOC
CLEAR
RA8
RA4
RA2
RA1
A8
A2
A1
A4
CH0
DATA VALID
40nsec min.
ACQUISITION
CH0
CONVERSION
CH0
ACQUISITION
CH1
CONVERSION
CH1
9μsec typ. 6μsec typ.
EXTERNAL
STROBE PULSE
CH12
DATA VALID
ACQUISITION
CH12
CONVERSION
CH12
40nsec min.
40nsec min.
CH12
SELECTED
tt 20nsec min.
CH0 ADDRESSED
MODE CLEAR
CH1 ADDRESSED CH2 ADDRESSED CH12 ADDRESSED
SEQUENTIAL (EOC TIED TO STROBE) RANDOM
MAY CHANGE
OR DON'T CARE
CODE
t2
t ,
1
t
1t2t50nsec
®®
DATEL • 11 Cabot Boulevard, Mansfi eld, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com
HDAS-16, HDAS-8
12-Bit, 50kHz, Complete Data Acquisition Systems
06 May 2013 MDA_HDAS-16/8.C02 Page 6 of 8
Mechnical Dimensions
INCHES (mm)
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
2.325
(59.055)
0.150
(3.810)
1.100
(27.940) 1.415 MAX.
(35.94)
0.150
(3.810)
0.200 MAX.
(5.080)
0.100 TYP.
(2.540)
2.00 ±0.008
(50.800)
0.235 MAX.
(5.969)
0.190 MAX.
(4.826) 0.020 ±0.002
(0.508) 0.040
(1.016) 0.150
(3.810) SEATING
PLANE
0.025 ±0.010
(0.635)
1.100 ±0.008
(27.940) 0.150
(3.810)
121
3252
62
2.150 REF
1.250
REF
1.220
.050
1.000 1.000
.100 TYP
.900
.450
.100
TYP
REF
.050
REF
REF
.020
.100
.010
REF
C
L
C
L
2.120
.100
62x .050
2.30 REF
62x
1.40 REF
DIP PACKAGE
SMT PACKAGE
®®
DATEL • 11 Cabot Boulevard, Mansfi eld, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com
HDAS-16, HDAS-8
12-Bit, 50kHz, Complete Data Acquisition Systems
06 May 2013 MDA_HDAS-16/8.C02 Page 7 of 8
ISO 9001
ISO 9001
REGISTERED
ORDERING INFORMATION
Model Number Operating Temperature Package RoHS Compliant
HDAS-16MC 0 to +70°C DIP NO
HDAS-16ME -40 to +100°C DIP NO
HDAS-16MM -55 to +125°C DIP NO
HDAS-16/883 -55 to +125°C DIP NO
HDAS-16GC 0 to +70°C SMT NO
HDAS-16GE -40 to +100°C SMT NO
HDAS-16GM -55 to +125°C SMT NO
HDAS-16G/883* -55 to +125°C SMT NO
HDAS-16MC-C 0 to +70°C DIP YES
HDAS-16ME-C -40 to +100°C DIP YES
HDAS-16MM-C -55 to +125°C DIP YES
HDAS-16MM-QL -55 to +125°C DIP NO
HDAS-16/883-C -55 to +125°C DIP YES
HDAS-16GC-C 0 to +70°C SMT YES
HDAS-16GE-C -40 to +100°C SMT YES
HDAS-16GM-C -55 to +125°C SMT YES
HDAS-16G/883-C -55 to +125°C SMT YES
HDAS-8MC 0 to +70°C DIP NO
HDAS-8ME -40 to +100°C DIP NO
HDAS-8MM -55 to +125°C DIP NO
HDAS-8/883 -55 to +125°C DIP NO
HDAS-8GC 0 to +70°C SMT NO
HDAS-8GE -40 to +100°C SMT NO
HDAS-8GM -55 to +125°C SMT NO
HDAS-8G/883 -55 to +125°C SMT NO
HDAS-8MC-C 0 to +70°C DIP YES
HDAS-8ME-C -40 to +100°C DIP YES
HDAS-8MM-C -55 to +125°C DIP YES
HDAS-8MM-QL -55 to +125°C DIP NO
HDAS-8/883-C -55 to +125°C DIP YES
HDAS-8GC-C 0 to +70°C SMT YES
HDAS-8GE-C -40 to +100°C SMT YES
HDAS-8GM-C -55 to +125°C SMT YES
HDAS-8G/883-C -55 to +125°C SMT YES
Receptacle for PC board mounting can be ordered through AMP Inc.,
Part #3-331272-4 (Component Lead Spring Socket), 62 required.
The MIL-STD-883 units are available under DESC Drawing Number
5962-8851404.
Contact DATEL for MIL-STD-883 product specifi cations.
*HDAS-16G/883 devices are delivered with solder-tin leads.
. 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. Specifi cations are subject to change
without notice.
www.datel.com • e-mail: help@datel.com
®®
DATEL
11 Cabot Boulevard, Mansfi eld, MA 02048-1151 USA
ITAR and ISO 9001/14001 REGISTERED
HDAS-16, HDAS-8
12-Bit, 50kHz, Complete Data Acquisition Systems
06 May 2013 MDA_HDAS-16/8.C02 Page 8 of 8
© 2013
