HDAS-524, HDAS-528
12-Bit, 400kHz, Complete
Data Acquisition System
FEATURES
12-Bit resolution, 400kHz throughput
8 Channels single-ended or 4 channels
differential
Miniature, 40-pin, ceramic DDIP
Full scale input range from 100mV to 10V
Three-state outputs
No missing codes
PIN
INPUT/OUTPUT CONNECTIONS
FUNCTION
CH0/CH0 HI
CH1/CH1 HI
CH2/CH2 HI
CH3/CH3 HI
CH7/CH3 LO
CH6/CH2 LO
CH5/CH1 LO
CH4/CH0 LO
COMP BIN
RGAIN LO
RGAIN HI
S/H OUT
+10V REFERENCE OUT
SIGNAL GROUND
GAIN ADJUST
OFFSET ADJUST
BIPOLAR
–15V SUPPLY
ANALOG GROUND
+15V SUPPLY
GAIN ADJUST
PIN
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
FUNCTION
START CONVERT
CA2
CA1
CA0
+5V SUPPLY
DIGITAL GROUND
ENABLE
BIT 1 (MSB)
BIT 2
BIT 3
BIT 4
BIT 5
BIT 6
BIT 7
BIT 8
BIT 9
BIT 10
BIT 11
BIT 12 (LSB)
EOC
GENERAL DESCRIPTION
The HDAS-524 and HDAS-528 are complete data acquisition systems. Each
contains an internal multiplexer, instrumentation amplifier, sample-hold,
analog-to-digital converter and three-state outputs. Packaged in miniature,
40-pin, double-dip packages, the HDAS-524/528 have a low power dissipation
of 2.6 Watts.
The HDAS-524 provides 4 differential inputs, and the HDAS-528 provides
8 single-ended inputs. An internal instrumenta- tion amplifier is characterized
for gains of 1, 2, 4, 8, 10 and 100. The gain range is selectable through a
single external resistor.
HDAS-524/528 OPERATION
The HDAS devices accept either 8 single-ended or 4 differential input signals.
Tie unused channels to SIGNAL GROUND, pin 14. Channel selection is
accomplished using the multiplexer address pins as shown in Table 1. Obtain
additional channels by connecting external multiplexers.
The acquisition time is the amount of time the multiplexer, instrumentation
amplifier and sample-hold require to settle within a specified range of accu-
racy. The acquisition time can be measured by how long EOC is low before
the rising edge of the START CONVERT pulse for continuous operation. Higher
Continued on page 3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
RGAIN LO
RGAIN HI
BIPOLAR
17
S/H OUT
11
10
12 15
OFFSET
ADJUST
16
CH0/CH0 HI 1
CH1/CH1 HI 2
CH2/CH2 HI 3
CH3/CH3 HI 4
CH4/CH0 LO 8
CH5/CH1 LO 7
CH6/CH2 LO 6
CH7/CH3 LO 5
2 x 4:1
HDAS-524
MUX
8:1
HDAS-528
(524)
(528)
I/A
S/H
12-BIT
A/D
3 STATE
OUTPUT
33 BIT 1 (MSB)
32 BIT 2
31 BIT 3
30 BIT 4
29 BIT 5
28 BIT 6
27 BIT 7
26 BIT 8
25 BIT 9
24 BIT 10
23 BIT 11
22 BIT 12 (LSB)
SIGNAL GROUND 14
39
38
37
19
35
36
20
18
13
40
21
9
34
+15V SUPPLY
+5V SUPPLY
15V SUPPLY
START
CONVERT
COMP BIN
ANA GND
DIG GND
REF. OUT
Typical topology is shown.
Figure 1. Functional Block Diagram
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MDC_HDAS-524/528.B01 Page 1 of 5
ENABLE
CA1
CA0
EOC
CA2
HDAS-524, HDAS-528
ABSOLUTE MAXIMUM RATINGS
PARAMETERS
MIN.
TYP.
MAX.
UNITS
PERFORMANCE
MIN.
+15V Supply, Pin 20
–15V Supply, Pin 18
+5V Supply, Pin 36
Digital Inputs, Pins 9, 34, 37-40
Analog Inputs, Pins 1–8
Lead Temperature
(10 seconds)
0
0
–0.5
–0.3
–15
—
—
—
—
—
—
—
+18
–18
+7
+V
DD
+0.3
+15
300
Volts
Volts
Volts
Volts
Volts
°C
FUNCTIONAL SPECIFICATIONS
(Apply over the operating temperature range with ±15V and +5V supplies unless
otherwise specified.)
ANALOG INPUTS
MIN.
TYP.
MAX.
UNITS
Number of Inputs
HDAS-524
HDAS-528
Input Voltage Ranges
Gain = 1
Gain = 100
I.A. Gain Ranges
Input Impedance
CH On, CH Off
Input Capacitance
(-524) CH On, CH Off
(-528) CH On, CH Off
Input Bias Current
Input Offset Current
Input Offset Voltage
Common Mode Voltage Range
CMRR,
G = 1, @10Hz,
Vcm = 1Vp-p
Voltage Noise (RMS)
Gain = 1
Gain = 8
MUX Crosstalk @125kHz
MUX ON Resistance
Bias Current Tempco
Offset Current Tempco
Offset Voltage Tempco
Input Gain Equation
DIGITAL INPUTS
4 differential inputs
8 single-ended inputs
0 to +10V, ±10V
0 to +100mV, ±100mV
1, 2, 4, 8, 10, 100
10
11
—
—
—
—
—
±11
72
10
12
—
—
—
—
—
—
80
—
12
25
±200
±50
±10
—
—
Ohms
pF
pF
pA
pA
mV
Volts
dB
Resolution
Integral Nonlinearity,
+25°C
0 to +70°C
–55 to +125°C
Differential Nonlinearity,
+25°C
0 to +70°C
–55 to +125°C
F.S. Abs. Accuracy,
+25°C
0 to +70°C
–55 to +125°C
Unipolar Zero Error,
+25°C
Unipolar Zero Tempco
Bipolar Zero Error,
+25°C
Bipolar Zero Tempco
Bipolar Offset Error,
+25°C
Bipolar Offset Tempco
Gain Error,
+25°C
Gain Tempco
Harmonic Distortion (–FS)
(DC to 5kHz, 10Vp-p)
No Missing Codes
SIGNAL TIMING
12-Bit, 400kHz, Complete
TYP.
MAX.
UNITS
Acquisition System
12
Data
—
—
Bits
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
±0.13
±0.15
±0.25
±0.074
±15
±0.074
±5
±0.1
±20
±0.1
±20
±0.75
±0.75
±1.5
±0.75
±0.75
±1
±0.3
±0.5
±0.78
±0.15
±30
±0.15
±10
±0.25
±40
±0.25
±40
LSB
LSB
LSB
LSB
LSB
LSB
%FSR
%FSR
%FSR
%FSR
ppm/°C
%FSR
ppm/°C
%FSR
ppm/°C
%
ppm/°C
–73
–65
dB
Over operating temperature range
—
—
100
—
—
—
—
—
—
—
—
—
—
10
—
—
20
800
850
880
—
—
—
—
—
—
ns
ns
ns
ns
ns
ns
ns
kHz
kHz
kHz
kHz
kHz
kHz
—
—
200
V
—
—
50
V
–72
—
—
dB
—
450
500
Ohms
Doubles (max.) every 10°C above +70°C
Doubles (max.) every 10°C above +70°C
(±30ppm/°C x gain) ±20ppm/°C (max.)
2k
GAIN =
+1
R
GAIN
Enable to Data Valid Delay
MUX Address Set-up Time
Start Convert Pulse Width
Data Valid After
EOC Signal Goes Low
Conversion Time,
+25°C
0 to +70°C
–55 to +125°C
Throughput Rates
Gain = 1
Gain = 2
Gain = 4
Gain = 8
Gain = 10
Gain = 100
S/H PERFORMANCE
—
400
50
—
—
—
—
400
325
275
225
175
40
Logic Levels
Logic 1
Logic 0
Logic Loading
Logic 1
Logic 0
OUTPUTS
+2.0
—
—
—
—
—
—
—
—
+0.5
+5
–600
Volts
Volts
A
A
Acquisition Time
Full-Scale Step to ±0.01%
Full-Scale Step to ±0.1%
Aperture Delay
Aperture Uncertainty
Slew Rate
Hold Mode Settling Time
To ±1mV
To ±10mV
Feedthrough Rejection
Droop Rate
POWER SUPPLIES
—
—
–50
—
±70
—
—
80
—
+14.25
–14.25
+4.75
—
—
—
—
—
0
–55
–65
500
400
–20
—
±90
100
75
88
±0.1
+15.0
–15.0
+5.0
+78
–72
+75
2.6
—
900
750
0
±150
—
200
150
—
±100
+15.75
–15.75
+5.25
+90
–82
+95
3
±0.05
ns
ns
ns
ps
V/μs
ns
ns
dB
μV/μs
Volts
Volts
Volts
mA
mA
mA
Watts
%FSR/%V
°C
°C
°C
Logic Levels
Logic 1
Logic 0
Logic Loading
Logic 1
Logic 0
Internal Reference
Voltage, +25°C
Drift
External Current
Output Coding
Footnotes:
+2.4
—
—
—
+9.9
—
—
—
—
—
—
—
+0.4
–160
+6.4
Volts
Volts
A
mA
+10.0
+10.1
Volts
±5
±35
ppm/°C
—
1.5
mA
Straight binary/Offset binary
Comp. binary/Comp. offset binary
Range,
+15V Supply
–15V Supply
+5V Supply
Current,
+15V Supply
–15V Supply
+5V Supply
Power Dissipation
Power Supply Rejection
PHYSICAL/ENVIRONMENTAL
Specifications valid at +25°C and over the temperature ranges of 0 to +70°C or –55 to +125°C.
Oper. Temp. Range, Case,
-MC,
-MM, 883
Storage Temp. Range
Package Type
Weight
—
+70
—
+125
—
+150
40-pin ceramic DDIP
0.56 ounces (16 grams)
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MDC_HDAS-524/528.B01 Page 2 of 5
HDAS-524, HDAS-528
gains require the use of the R
GAIN
resistor to increase the acquisition time.
The gain is equal to 1 without an R
GAIN
resistor. Table 2 refers to the appropriate
R
GAIN
resistors for various throughputs.
The HDAS devices enter the hold mode and are ready for conversion upon
the start convert going high. The conversion is complete within a maximum of
800ns (+25°C). EOC returns low, the data is valid and sent to the three-state
output buffers. The sample/hold is now ready to acquire new data.
CALIBRATION PROCEDURE
1. Connect the converter per Figure 2 and Tables 2 and 3 for the appropriate
input range. Apply a pulse of 100 nano-seconds (typical) to the START
CONVERT input (pin 40) at a rate of 100kHz. This rate is chosen to reduce
flicker if LED’s are used on the outputs for calibration purposes.
2. Zero Adjustments
Apply a precision voltage reference source between the analog input and
SIGNAL GROUND (pin 14). Adjust the output of the reference source per
Table 3. For unipolar, adjust the zero trimming potentiometer so that the
output code flickers equally between 0000 0000 0000 and 0000 0000
0001 with the COMP BIN (pin 9) tied high (straight binary) or between
1111 1111 1111 and 1111 1111 1110 with the COMP BIN (pin 9) tied low
(complementary binary).
For bipolar operation, adjust the potentiometer such that the code flickers
equally between 1000 0000 0000 and 1000 0000 0001 with COMP BIN
(pin 9) tied high (offset binary) or between 0111 1111 1111 and 0111
1111 1110 with COMP BIN (pin 9) tied low (complementary offset binary).
3. Full-Scale Adjustment
Set the output of the voltage reference used in step 2 to the value shown
in Table 3. Adjust the gain trimming potentiometer so that the output
code flickers equally between 1111 1111 1110 and 1111 1111 1111 or
0000 0000 0001 and 0000 0000 0000 for complementary coding.
4. To confirm proper operation of the device, vary the precision reference
voltage source to obtain the output coding listed in Table 4.
36
+
4.7µF
DGND
0.1µF
35
10
R GAIN
11
+10V REF
4.7µF
15V
20k
15V
20k
+15V
15V
18
4.7µF
4.7µF
+15V
+
+
0.1µF
19
0.1µF
20
+15V
16
OFFSET ADJUST
15
GAIN ADJUST
13
+
0.1µF
19
RGAIN HI
R GAIN LO
12-Bit, 400kHz, Complete
Data Acquisition System
Table 1. MUX Channel Addressing
MUX ADDRESS PINS
39
38
37
CA2 CA1 CA0
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
CHANNEL
0
1
2
3
4
5
6
7
HDAS-524
(2-BIT ADDRESS)
HDAS-528
(3-BIT ADDRESS)
Table 2. Input Range Parameters
INPUT RANGE
0 to +10V
0 to +5V
0 to +2.5V
0 to +1.25V
0 to +1V
0 to +100mV
±10V
±5V
±2.5V
±1.25V
±1V
±100mV
GAIN
1
2
4
8
10
100
1
2
4
8
10
100
R
GAIN
OPEN
2k
665
287
221
20
OPEN
2k
665
287
221
20
THROUGHPUT
400kHz
325kHz
275kHz
225kHz
175kHz
40kHz
400kHz
325kHz
275kHz
225kHz
175kHz
40kHz
+5V
2k
R
GAIN
=
(GAIN –1)
2k
GAIN =
+1
R
GAIN
Table 3. Zero and Gain Adjust
INPUT RANGE
0 to +10V
±10V
ZERO ADJUST
+1/2LSB
+1.22mV
+2.44mV
GAIN ADJUST
+FS – 1 1/2LSB
+9.9963V
+9.9927V
Notes:
AGND
Figure 2. Typical Connection Diagram
1. For unipolar operation, connect pin 12 to pin 17.
2. For bipolar operation, connect pin 13 to pin 17.
3. Position R
GAIN
as close as possible to pins 10 and 11.
Use RN55C, 1% resistors.
4. If gain and offset adjusts are not used, connect pin 15
to ground and leave pin 16 open.
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MDC_HDAS-524/528.B01 Page 3 of 5
HDAS-524, HDAS-528
TECHNICAL NOTES
1. Rated performance requires using good high-frequency circuit board layout
techniques. The analog and digital ground pins are not connected to each
other internally. Avoid ground-related problems by connecting the analog,
signal and digital grounds to one point, the ground plane beneath the con-
verter. Due to the inductance and resistance of the power supply return paths,
return the analog and digital grounds separately to the power supplies. This
prevents contamination of the analog ground by noisy digital ground currents.
2. Double-level multiplexing allows expanding the multiplexer channel capacity
of the HDAS-528 from 8 single-ended channels to 128 single-ended chan-
nels or the HDAS-524 from 4 differential channels to 32 differential channels.
12-Bit, 400kHz, Complete
Data Acquisition System
3. Obtain straight binary/offset binary output coding by tying COMP BIN (pin 9)
to +5V or leaving it open. The device has an internal pull-up resistor on this
pin. To obtain complementary binary or complementary offset binary output
coding, tie pin 9 to ground. The COMP BIN signal is compatible to CMOS/TTL
logic levels for those users desiring logic control of this function.
4. To enable the three-state outputs, connect ENABLE (pin 34) to a logic "0"
(low). To disable, connect pin 34 to a logic "1" (high).
START
CONVERT
N1
100ns min.
850ns
N
EOC
20ns min.
35ns max.
35ns
OUTPUT
DATA
N 1 Valid
1.8µs
N 1 Valid
N Valid
ENABLE
30ns
30ns
CA1
30ns
Disable N 1
Enabled data
N Valid
Notes:
40ns typical
CA0
40ns typical
CH0 ADDRESSED
CH1 ADDRESSED
CH2 ADDRESSED
1. A START CONVERT pulse greater than
150ns will slow the throughput.
2. Retriggering START CONVERT before
EOC goes low will not start a new
conversion.
3. Times shown apply over the 0 to +70°C
operating temperature range.
Figure 3. HDAS-524/528 Timing Diagram
Table 4. Output Coding
STRAIGHT BINARY
UNIPOLAR
SCALE
+FS – 1LSB
+7/8FS
+3/4FS
+1/2FS
+1/4FS
+1/8FS
+1LSB
0
INPUT RANGE
0 to +10V
+9.9976V
+8.7500V
+7.5000V
+5.0000V
+2.5000V
+1.2500V
+0.0024V
0.0000V
MSB
1111
1110
1100
1000
0100
0010
0000
0000
1111
0000
0000
0000
0000
0000
0000
0000
COMP. BINARY
LSB
INPUT RANGE
±10V
+9.9951V
+7.5000V
+5.0000V
0.0000V
–5.0000V
–7.5000V
–9.9951V
–10.0000V
BIPOLAR
SCALE
+FS – 1LSB
+3/4FS
+1/2FS
0
–1/2FS
–3/4FS
–FS + 1LSB
–FS
OUTPUT CODING
LSB
MSB
1111
0000
0000
0000
0000
0000
0001
0000
0000 0000 0000
0001 1111 1111
0011 1111 1111
0111 1111 1111
1011 1111 1111
1101 1111 1111
1111 1111 1110
1111 1111 1111
COMP. OFF. BINARY
OFFSET BINARY
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MDC_HDAS-524/528.B01 Page 4 of 5
HDAS-524, HDAS-528
Mechnical Dimensions
INCHES (mm)
12-Bit, 400kHz, Complete
Data Acquisition System
2.12 MAX.
(53.85)
40-PIN DDIP
(unless otherwise indicated):
2 place decimal (.XX) ±0.010 (±0.254)
3 place decimal (.XXX) ±0.005 (±0.127)
21
0.80 MAX.
(20.32)
Kovar alloy
50 microinches (minimum) gold plating
over 100 microinches (nominal) nickel plating
40
1
20
0.100 TYP.
(2.540)
1.900 ±0.008
(48.260)
0.245 MAX.
(6.223)
PIN 1 INDEX
( ON TOP)
0.200 MAX.
(5.080)
0.210 MAX.
(5.334)
0.018 ±0.002
(0.457)
0.040
(10.160)
0.100
(2.540)
SEATING
PLANE
0.025
(0.635)
0.012 ±0.003
(0.305)
0.600 ±0.010
(15.240)
0.100
(2.540)
Ordering Information
Model No.
HDAS-524MC
HDAS-524MM
HDAS-528MC
HDAS-528MM
HDAS-528/883
Input
4D Channels
4D Channels
8SE Channels
8SE Channels
8SE Channels
Operating Temp. Range
0 to +70°C
–55 to +125°C
0 to +70°C
–55 to +125°C
–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 #3-331272-8 (Component Lead Socket), 40 required.
Contact Murata Power Solutions for MIL-STD-883 product specifications.
USA:
Canada:
UK:
France:
Tucson (AZ), Tel: (800) 547 2537, email: sales@murata-ps.com
Toronto, Tel: (866) 740 1232, email: toronto@murata-ps.com
Milton Keynes, Tel: +44 (0)1908 615232, email: mk@murata-ps.com
Montigny Le Bretonneux, Tel: +33 (0)1 34 60 01 01, email: france@murata-ps.com
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
Shanghai, Tel: +86 215 027 3678, email: shanghai@murata-ps.com
Guangzhou, Tel: +86 208 221 8066, email: guangzhou@murata-ps.com
Germany:
München, Tel: +49 (0)89-544334-0, email: ped.munich@murata-ps.com
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
Japan:
email: sales@murata-ps.com
3/12/08
China:
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-524/528.B01 Page 5 of 5
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