ADC803
High Speed
ANALOG-TO-DIGITAL CONVERTER
FEATURES
q
12-BIT RESOLUTION
q
LINEARITY ERROR:
0.12%, max
(C Grade)
q
NO MISSING CODES: 55
C to +125
C
(S Grade)
q
HIGH SINAD RATIO: 72dB
q
LOW HARMONIC DISTORTION: 73dB
q
CONVERSION TIME: 500ns, 8 Bits
670ns, 10 Bits
1.5
s, 12 Bits
DESCRIPTION
The ADC803 is a high speed hybrid successive
approximation analog-to-digital converter utilizing
laser-trimmed thin film components.
It is complete with internal reference, clock, and
comparator, and is packaged in a 32-pin metal pack-
age. Conversion time is set at the factory to 1.5
s.
With user-adjusted conversion time set at 1
s,
1LSB
accuracy can be achieved. The gain and offset errors
may be externally trimmed to zero.
Internal scaling resistors are provided for the selection
of analog signal input ranges of 0V to 10V,
5V,
and
10V.
Output codes available are complementary binary
for unipolar inputs and bipolar offset binary for
bipolar inputs.
All digital inputs and outputs are TTL-compatible.
Power supply requirements are
15V and +5V.
12-Bit
Successive Approx.
Register (SAR)
12-Bit
Converter
Clock
Reference
Input
Range
Select
Comparator In
Bipolar Offset
Clock Rate Control
Clock Out
Status
Convert Command
Parallel
Digital
Output
International Airport Industrial Park Mailing Address: PO Box 11400 Tucson, AZ 85734 Street Address: 6730 S. Tucson Blvd. Tucson, AZ 85706
Tel: (520) 746-1111 Twx: 910-952-1111 Cable: BBRCORP Telex: 066-6491 FAX: (520) 889-1510 Immediate Product Info: (800) 548-6132
1983 Burr-Brown Corporation
PDS-493D
Printed in U.S.A. October, 1993
2
ADC803
SPECIFICATIONS
At +25
C, rated power supplies, 1.5
s conversion time, and after 6-minute warm-up, unless otherwise noted.
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user's own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant
any BURR-BROWN product for use in life support devices and/or systems.
ADC803CM
ADC803BM
ADC803SM
PARAMETER
MIN
TYP
MAX
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
RESOLUTION
12
12
12
Bits
INPUTS
ANALOG
Voltage Ranges: Bipolar
5,
10
*
*
V
Unipolar
0 to 10
*
*
V
Impedance: 10V to 0V,
5V
1.4
*
*
k
10V
2.4
*
*
k
DIGITAL
Convert Command
Logic Loading
4
*
*
TTL Loads
TRANSFER CHARACTERISTICS
ACCURACY
Gain Error
(1)
0.04
0.1
0.08
0.2
0.04
0.1
%
Offset Error
(1)
: Unipolar
0.05
0.2
0.07
0.3
*
*
% of FSR
(2)
Bipolar
0.02
0.1
*
0.2
*
*
% of FSR
Linearity Error:
1.5
s Conversion Time
0.009
0.012
0.020
0.012
0.015
% of FSR
1.0
s Conversion Time
0.015
0.020
0.020
% of FSR
Differential Linearity Error:
1.5
s Conversion Time
0.012
0.015
0.020
*
*
% of FSR
1.0
s Conversion Time
0.024
0.024
*
% of FSR
Inherent Quantization Error
1/2
*
*
LSB
POWER SUPPLY SENSITIVITY
Gain and Offset: +15VDC
0.0036
*
*
% of FSR/%V
CC
15VDC
0.0005
*
*
% of FSR/%V
CC
+5VDC
0.001
*
*
% of FSR/%V
DD
Conversion Time: +15VDC
0.7
*
*
%/%V
CC
15VDC
None
*
*
%/%V
CC
+5VDC
0.8
*
*
%/%V
DD
CONVERSION TIME
Factory Set
1.3
1.5
*
*
*
*
s
Range of Adjustments
0.8
2.2
*
*
*
*
s
DRIFT
Gain
10
30
15
*
*
*
ppm of FSR/
C
Offset: Unipolar
2
7
3
*
*
*
ppm of FSR/
C
Bipolar
3
10
5
*
*
*
ppm of FSR/
C
Linearity Error
25
C to +85
C:
1.5
s Conversion Time
0.012
0.018
0.024
*
% of FSR
1.0
s Conversion Time
0.015
0.020
*
% of FSR
55
C to +125
C:
1.7
s Conversion Time, max
(4)
0.015
0.024
% of FSR
Differential Linearity Error
25
C to +85
C:
1.5
s Conversion Time
0.012
0.018
0.024
% of FSR
1.0
s Conversion Time
0.015
0.024
% of FSR
55
C to +125
C:
1.7
s Conversion Time, max
(4)
0.1
0.015
0.024
% of FSR
Conversion Time
*
*
% of FSR
No Missing Code Temp. Range:
1.5
s Conversion Time
25
+85
*
*
C
1.7
s Conversion Time, max
(4)
55
+125
C
OUTPUT
DIGITAL DATA
Parallel
Output Codes: Unipolar Complementary Straight Binary
*
*
Bipolar
Bipolar Offset Binary
*
*
Output Drive
6
*
*
TTL Loads
Status
Logic "1" During Conversion
*
*
Status Output Drive
6
*
*
TTL Loads
Internal Clock
Clock Output Drive
3
*
*
TTL Loads
Frequency (without external clock adj.)
8
*
*
MHz
Negative pulse 50ns wide (min) trailing edge (0 to 1) initiates conversion.
3
ADC803
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
Clock
Reference
12-Bit D/A
Converter
12-Bit SAR
2k
1k
545
Comparator
(MSB) Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
+5VDC (V
DD
) Supply
Digital Common
(1)
Status
Bit 7
Bit 8
Bit 9
Bit 10
Bit 11
Bit 12
Analog Common
+15VDC Supply (+V
CC
)
15VDC Supply (V
CC
)
Bipolar Offset
Analog Common
Sense
Comparator In
10V
20V
15VDC Supply (V
CC
)
+5VDC Supply (V
DD
)
Digital Common
+15VDC Supply (+V
CC
)
Clock Rate Control
Convert Command
Clock Out
NOTE: (1) Serial data is not guaranteed.
SPECIFICATIONS
(CONT)
At +25
C, rated power supplies, 1.5
s conversion time, and after 6-minute warm-up, unless otherwise noted.
ADC803CM
ADC803BM
ADC803SM
PARAMETER
MIN
TYP
MAX
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
POWER SUPPLY REQUIREMENTS
Power Consumption
Rated Voltage: Analog (
V
CC
)
14.25
15
15.75
*
*
*
*
*
*
VDC
Digital (V
DD
)
+4.75
+5
+5.25
*
*
*
*
*
*
VDC
Supply Drain: +15V
+27
+32
*
*
*
*
mA
15V
38
55
*
*
*
*
mA
+5V
+180
+210
*
*
*
*
mA
TEMPERATURE RANGE (Ambient)
Specification
25
+85
*
*
55
+125
C
Storage
55
+125
*
*
*
*
C
* Same specification as for ADC803CM.
NOTES: (1) Adjustable to zero. See Optional Gain and Offset Adjustment section. (2) FSR means Full Scale Range. For example, unit connected for
10V has
20V FSR. (3) See Optional Clock Rate Control section. For faster conversion time at less resolution, see section on External Short Cycle. (4) Conversion time is
factory-set at approximately 1.4
s at +25
C. As temperature increases, the conversion time increases. At +125
C the conversion time will be no more than 1.7
s.
No Missing Codes is guaranteed over 55
C to +125
C provided the conversion time is allowed to increase with temperature.
ADC803 dynamic performance characteristics are described in a report titled "Analogue-to-Digital Converter Performance Tests Using the Fast Fourier Transform"
by R. A. Belcher, University College of Swansea, Wales, UK. (available from Burr-Brown on letterhead request).
CONNECTION DIAGRAM
ADC803 X
M
Q
Basic Model Number
Performance Grade Code
B, C = 25
C to +85
C
S = 55
C to +125
C
Package Code
M = Metal DIP
Reliability Screening
Q = Q-Screened
ORDERING INFORMATION
ABSOLUTE MAXIMUM RATINGS
Analog Supply Voltage To Analog Common ....................................
18V
Digital Supply Voltage To Digital Common ......................................... +7V
Digital Controls Inputs ...................................................................... +5.5V
Analog Inputs .....................................................................................
15V
Operating Temperature: Ambient .................................................. +125
C
Case ....................................................... +135
C
Storage Temperature ..................................................................... +125
C
PACKAGE INFORMATION
PACKAGE DRAWING
MODEL
PACKAGE
NUMBER
(1)
ADC803
32-Pin Metal
116
NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix D of Burr-Brown IC Data Book.
This datasheet has been download from:
www.datasheetcatalog.com
Datasheets for electronics components.
PDF 
ZIP