®
ADC-HS12B
®
12-Bit A/D Converter with Sample-Hold
FEATURES
12-Bit resolution
Internal sample and hold
Microseconds acquisition time
6
Microseconds conversion time
9
Programmable input ranges
Parallel output
Typical unit
PRODUCT OVERVIEW
MECHANICAL DIMENSIONS
The ADC-HS12B is a high performance 12-bit hybrid AID converter with a
self-contained sample-hold. It is specifically designed for systems applications where the sample-hold is an integral part of the conversion process. The
internal sample-hold has a 6 microseconds acquisition time for a full 10V dc
input change; the AID converter has a fast 9 microseconds conversion time.
Five input voltage ranges are programmable by external pin connection; 0 to
+5V, 0 to+10V, ±2.5V, ±5V, and ±10V. Input impedance to the sample-hold is
100 megohms. Output coding is complementary binary for unipolar operation
and complimentary offset binary for bipolar operation.
The ADC-HS12B uses a fast 12-bit monolithic DAC which includes a precision zener reference source. The circuit also contains a fast monolithic 12-bit
successive approximation register, a clock and a monolithic sample-hold.
0.235 MAX
(5.969)
0.190 MAX
(4.826)
0.035/0.015
(0.889/0.381)
PIN #1 INDEX
0.021/0.016
(0.534/0.406)
0.045/0.035
(1.143/0.889)
0.100 BSC
(2.54)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
1.72/1.69
(43.69/42.92
0.11/0.09
(2.80/2.28)
1.11/1.08
(28.20/27.43)
0.200/0.175
(5.08/4.44)
SEATING PLANE
SIMPLIFIED SCHEMATIC
CH
SAMPLE BIPOLAR REF
CONTROL OFFSET OUT
17
32
23
+15Vdc -15Vdc
18
28
0.015/0.009
(0.381/0.228)
+5Vdc
31
16
0.920/0.890
(23.37/22.60)
6.3K
PRECISION
REFERENCE
CIRCUIT
SAMPLE
HOLD
ANALOG 30
IN
Dimensions in inches (mm)
S.H. 29
OUT
27
15
12-BIT
D/A CONVERTER
GAIN
ADJUST
DIGITAL
COMMON
COMPARATOR
COMPAR 22
IN
14
5K
10V 24
RANGE
SUCCESSIVE
APPROXIMATION
REGISTER
20
SHORT
CYCLE
E.O.C.
STATUS
Pin
INPUT/OUTPUT CONNECTIONS
Function
Pin
Function
BIT NO.
2
1
MSB
13
SERIAL
DATA
OUT
CLOCK
OUT
START
CONVERT
DATEL
LSB
3
PARALLEL DATA OUT
•
11 Cabot Boulevard, Mansfield, MA 02048-1151 USA
E.O.C. (STATUS)
5
BIT 8 OUT
21
START CONVERT
6
BIT 7 OUT
22
COMPAR INPUT
BIT 6 OUT
23
BIPOLAR OFFSET
BIT 5 OUT
24
10V RANGE
BIT 4 OUT
25
20V RANGE
BIT 3 OUT
26
ANALOG COM
BIT 2 OUT
27
GAIN ADJ
BIT 1 OUT (MSB)
28
+ 15V POWER
DO NOT CONNECT
29
S.H. OUTPUT
SHORT CYCLE
30
ANALOG IN
DIGITAL COM
31
-15V POWER
16
4
DO NOT CONNECT
15
9 10 11 12
5
20
14
8
6
19
13
7
7
3
BIT 9 OUT
12
6
2
BIT 10 OUT
11
5
8
1
4
10
4
12 11 10 9
CH
REF
9
19 21
18
8
ANALOG 26
COMMON
17
BIT 11 0UT
3
CLOCK
BIT 12 OUT (LSB)
2
5K
1
7
20V
RANGE 25
+5V POWER
32
SAMPLE CONTROL
•
Tel: (508) 339-3000
•
www.datel.com
•
e-mail: help@datel.com
26 Jun 2012 MDA_ADCHS-12B.B03 Page 1 of 4
