6-952
Features
Complete 12-Bit A/D Converter with Reference and Clock
Full 8-Bit, 12-Bit or 16-Bit Microprocessor Bus Interface
Bus Access Time . . . . . . . . . . . . . . . . . . . . . . . . . . 150ns
No Missing Codes Over Temperature
Minimal Setup Time for Control Signals
Fast Conversion Times
- HI-574A (Max) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
s
- HI-674A (Max) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
s
- HI-774 (Max) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
s
Digital Error Correction (HI-774)
Low Noise, via Current-Mode Signal
Transmission Between Chips
Byte Enable/Short Cycle (A
O
Input)
- Guaranteed Break-Before-Make Action, Eliminating
Bus Contention During Read Operation. Latched by
Start Convert Input (To Set the Conversion Length)
Supply Voltage . . . . . . . . . . . . . . . . . . . . .
12V to
15V
Applications
Military and Industrial Data Acquisition Systems
Electronic Test and Scientific Instrumentation
Process Control Systems
Description
The HI-X74(A) is a complete 12-bit, Analog-to-Digital
Converter, including a +10V reference clock, three-state out-
puts and a digital interface for microprocessor control. Succes-
sive approximation conversion is performed by two monolithic
dice housed in a 28 lead package. The bipolar analog die fea-
tures the Intersil Dielectric Isolation process, which provides
enhanced AC performance and freedom from latch-up.
Custom design of each IC (bipolar analog and CMOS digital)
has yielded improved performance over existing versions of
this converter. The voltage comparator features high PSRR
plus a high speed current-mode latch, and provides precise
decisions down to 0.1 LSB of input overdrive. More than 2X
reduction in noise has been achieved by using current
instead of voltage for transmission of all signals between the
analog and digital ICs. Also, the clock oscillator is current
controlled for excellent stability over temperature.
The HI-X74(A) offers standard unipolar and bipolar input
ranges, laser trimmed for specified linearity, gain and offset
accuracy. The low noise buried zener reference circuit is
trimmed for minimum temperature coefficient.
Power requirements are +5V and
12V to
15V, with typical
dissipation of 385mW (HI-574A/674A) and 390mW (HI-774) at
12V. All models are available in sidebrazed DIP, PDIP, and
CLCC. For additional HI-Rel screening including 160 hour burn-
in, specify "-8" suffix. For MIL-STD-883 compliant parts, request
HI-574A/883, HI-674A/883, and HI-774/883 data sheets.
Pinouts
(PDIP, SBDIP)
TOP VIEW
(CLCC)
TOP VIEW
STATUS, STS
DB11
DB10
DB9
DB8
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
DIG COMMON,
DIGITAL
DATA
OUTPUTS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
CHIP ENABLE, CE
+10V REF, REF OUT
REFERENCE INPUT
20V INPUT
ANALOG
COMMON, AC
+12V/+15V SUPPLY, V
CC
BYTE ADDR/SHORT
CYCLE, A
O
10V INPUT
+5V SUPPLY, V
LOGIC
CHIP SEL, CS
DATA MODE SEL, 12/8
READ/CONVERT, R/C
BIPOLAR OFFSET
BIP OFF
-12V/-15V SUPPLY, V
EE
MSB
LSB
DC
14
13
12
11
10
9
8
7
17
16
15
2
5
30
35
39
38
37
36
33
34
32
31
29
4
6
3
ANALOG COMMON, AC
NC
NC
NC
REFERENCE INPUT,
REF IN
+10V REFERENCE,
REF OUT
BIPOLAR OFFSET,
BIP OFF
NC
NC
DB9
DB8
DB7
DB6
DB5
DB4
DB3
DB2
NC
NC
NC
ST
A
TUS, STS
DB11, MSB
DB10
BYTE ADDRESS/
NC
NC
1
10V
20V
NC
NC
NC
NC
NC
(LSB) DB0
DC
DIG
DB1
NC
CHIP SELECT
,
CS
CHIP ENABLE, CE
+15V SUPPLY, V
CC
40
41
42
43
44
28
27
26
25
24
23
22
21
20
19
18
D
A
T
A
MODE
-15V SUPPLY, V
EE
READ CONVERT, R/C
SHOR
T CYCLE, A
O
+5V SUPPL
Y
,
V
LOGIC
SELECT
, 12/
8
COMMON,
August 1997
HI-574A, HI-674A,
HI-774
Complete, 12-Bit A/D Converters
with Microprocessor Interface
File Number
3096.4
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Copyright Intersil Corporation 1999
6-955
Absolute Maximum Ratings
Thermal Information
Supply Voltage
V
CC
to Digital Common . . . . . . . . . . . . . . . . . . . . . . 0V to +16.5V
V
EE
to Digital Common. . . . . . . . . . . . . . . . . . . . . . . 0V to -16.5V
V
LOGIC
to Digital Common . . . . . . . . . . . . . . . . . . . . . . 0V to +7V
Analog Common to Digital Common
1V
Control Inputs
(CE, CS, A
O
, 12/8, R/C) to Digital Common . . -0.5V to V
LOGIC
+0.5V
Analog Inputs
(REFIN, BIPOFF, 10VIN) to Analog Common. . . . . . . . . .
16.5V
20VIN to Analog Common . . . . . . . . . . . . . . . . . . . . . . . . . .
24V
REFOUT . . . . Indefinite Short To Common, Momentary Short To V
CC
Operating Conditions
Temperature Range
HI3-574AxN-5, HI1-574AxD-5 . . . . . . . . . . . . . . . . . .0
o
C to 75
o
C
HI3-674AxN-5, HI1-674AxD-5 . . . . . . . . . . . . . . . . . .0
o
C to 75
o
C
HI3-774xN-5, HI1-774xD-5 . . . . . . . . . . . . . . . . . . . . .0
o
C to 75
o
C
HI1-574AxD-2, HI1-674AxD-2, HI1-774xD-2 . . . . -55
o
C to 125
o
C
Thermal Resistance (Typical, Note 1)
JA
(
o
C/W)
JC
(
o
C/W)
CLCC Package . . . . . . . . . . . . . . . . . .
65
14
SBDIP Package . . . . . . . . . . . . . . . . . .
60
18
HI3-574AxN-5, HI3-674AxN-5, HI3-774xN-5
65
N/A
Maximum Junction Temperature
HI3-574AxN-5, HI3-674AxN-5, HI3-774xN-5. . . . . . . . . . . . 150
o
C
HI1-574AxD-2, HI1-574AxD-5 . . . . . . . . . . . . . . . . . . . . . . . 175
o
C
HI1-674AxD-2, HI1-674AxD-5 . . . . . . . . . . . . . . . . . . . . . . . 175
o
C
HI1-774xD-2, HI1-774xD-5 . . . . . . . . . . . . . . . . . . . . . . . . . 175
o
C
Maximum Storage Temperature Range
HI3-574AxN-5, HI3-674AxN-5, HI3-774xN-5. . . . . .-40
o
C to 85
o
C
HI1-574AxD-2, HI1-574AxD-5 . . . . . . . . . . . . . . . .-65
o
C to 150
o
C
HI1-674AxD-2, HI1-674AxD-5 . . . . . . . . . . . . . . . .-65
o
C to 150
o
C
HI1-774xD-2, HI1-774xD-5 . . . . . . . . . . . . . . . . . .-65
o
C to 150
o
C
Maximum Lead Temperature (Soldering, 10s) . . . . . . . . . . . . 300
o
C
Die Characteristics
Transistor Count
HI-574A, HI-674A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1117
HI-774 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2117
DC and Transfer Accuracy Specifications
Typical at 25
o
C with V
CC
= +15V or +12V, V
LOGIC
= +5V, V
EE
= -15V or -12V,
Unless Otherwise Specified
PARAMETER
TEMPERATURE RANGE
-5 (0
o
C to 75
o
C)
UNITS
J SUFFIX
K SUFFIX
L SUFFIX
DYNAMIC CHARACTERISTICS
Resolution (Max)
12
12
12
Bits
Linearity Error
25
o
C (Max)
1
1
/
2
1
/
2
LSB
0
o
C to 75
o
C (Max)
1
1
/
2
1
/
2
LSB
Max Resolution For Which No Missing Codes Is Guaranteed
25
o
C
HI-574A, HI-674A
12
12
12
Bits
HI-774
11
12
12
Bits
T
MIN
to T
MAX
HI-574A, HI-674A
11
12
12
Bits
HI-774
11
12
12
Bits
Unipolar Offset (Max)
Adjustable to Zero
2
1.5
1
LSB
Bipolar Offset (Max)
V
IN
= 0V (Adjustable to Zero)
4
4
3
LSB
V
IN
= -10V
0.15
0.1
0.1
% of FS
Full Scale Calibration Error
25
o
C (Max), With Fixed 50
Resistor From REF OUT To REF IN
(Adjustable to Zero)
0.25
0.25
0.15
% of FS
T
MIN
to T
MAX
(No Adjustment At 25
o
C)
0.475
0.375
0.20
% of FS
T
MIN
to T
MAX
(With Adjustment To Zero 25
o
C)
0.22
0.12
0.05
% of FS
HI-574A, HI-674A, HI-774
6-956
Temperature Coefficients
Guaranteed Max Change, T
MIN
to T
MAX
(Using Internal Reference)
Unipolar Offset
HI-574A, HI-674A
2
1
1
LSB
HI-774
2
1
1
LSB
Bipolar Offset
HI-574A, HI-674A
2
1
1
LSB
HI-774
2
2
1
LSB
Full Scale Calibration
HI-574A, HI-674A
9
2
2
LSB
HI-774
9
5
2
LSB
Power Supply Rejection
Max Change In Full Scale Calibration
+13.5V < V
CC
< +16.5V or +11.4V < V
CC
< +12.6V
2
1
1
LSB
+4.5V < V
LOGIC
< +5.5V
1
/
2
1
/
2
1
/
2
LSB
-16.5V < V
EE
< -13.5V or -12.6V < V
EE
< -11.4V
2
1
1
LSB
ANALOG INPUTS
Input Ranges
Bipolar
-5 to +5
V
-10 to +10
V
Unipolar
0 to +10
V
0 to +20
V
Input Impedance
10V Span
5K,
25%
20V Span
10K,
25%
POWER SUPPLIES
Operating Voltage Range
V
LOGIC
+4.5 to +5.5
V
V
CC
+11.4 to +16.5
V
V
EE
-11.4 to -16.5
V
Operating Current
I
LOGIC
7 Typ, 15 Max
mA
I
CC
+15V Supply
11 Typ, 15 Max
mA
I
EE
-15V Supply
21 Typ, 28 Max
mA
Power Dissipation
15V, +15V
515 Typ, 720 Max
mW
12V, +5V
385 Typ
mW
Internal Reference Voltage
T
MIN
to T
MAX
+10.00
0.05 Max
V
Output Current, Available For External Loads (External Load Should
Not Change During Conversion).
2.0 Max
mA
DC and Transfer Accuracy Specifications
Typical at 25
o
C with V
CC
= +15V or +12V, V
LOGIC
= +5V, V
EE
= -15V or -12V,
Unless Otherwise Specified (Continued)
PARAMETER
TEMPERATURE RANGE
-5 (0
o
C to 75
o
C)
UNITS
J SUFFIX
K SUFFIX
L SUFFIX
HI-574A, HI-674A, HI-774
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