NOTES: (1) With fixed 50Ω resistor from REF OUT to REF IN. This parameter is also adjustable to zero at
±25°C
(see Optional External Full Scale and Offset
Adjustments section). (2) FS in this specification table means Full Scale Range. That is, for a
±10V
input range, FS means 20V; for a 0 to +10V range, FS means
10V. The term Full Scale for these specifications instead of Full-Scale Range is used to be consistent with other vendors' 574 and 574A type specifications tables.
(3) Using internal reference. (4) See Controlling the ADC574A section for detailed information concerning digital timing. (5) External loading must be constant during
conversion. The reference output requires no buffer amplifier with either
±12V
or
±15V
power supplies.
PIN CONFIGURATION
+5VDC Supply (V
LOGIC
)
12/8
CS
A
O
R/C
CE
+V
CC
Ref Out
Analog Common
Ref In
V
EE
Bipolar Offset
10V Range
20V Range
1
2
Power-up Reset
28
27
Status
DB11 (MSB)
DB10
DB9
DB8
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0 (LSB)
Digital Common
4
Nibble A
3
Control
Logic
26
25
24
23
6
7
8
9
10
11
12
5kΩ
13
14
5kΩ
10kΩ
12-Bit
D/A
Converter
12 Bits
10V
Reference
Successive Approximation Register
5
Three-State Buffers and Control
Clock
12 Bits
Nibble B
22
21
20
19
Nibble C
Comparator
18
17
16
15
®
3
ADC574A
ABSOLUTE MAXIMUM RATINGS
V
CC
to Digital Common ......................................................... 0V to +16.5V
V
EE
to Digital Common .......................................................... 0V to –16.5V
V
LOGIC
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 (Ref In, Bipolar Offset, 10V
IN
)
to Analog Common ......................................................................
±16.5V
20V
IN
to Analog Common ..................................................................
±24V
Ref Out .......................................................... Indefinite Short to Common,
Momentary Short to V
CC
Max Junction Temperature ............................................................ +165°C
Power Dissipation ........................................................................ 1000mW
Lead Temperature (soldering,10s) ................................................. +300°C
CAUTION: These devices are sensitive to electrostatic discharge.
Appropriate I.C. handling procedures should be followed.
BURN-IN SCREENING
Burn-in screening is available for both plastic and ceramic
package ADC574s. Burn-in duration is 160 hours at the
temperature (or equivalent combination of time and tem-
perature) indicated below:
Plastic “–BI” models: +85°C
Ceramic “–BI” models: +125°C
All units are 100% electrically tested after burn-in is com-
pleted. To order burn-in, add “–BI” to the base model
number (e.g., ADC574AKP-BI).
ORDERING INFORMATION
TEMPERATURE
RANGE
0°C to +75°C
0°C to +75°C
0°C to +75°C
0°C to +75°C
–55°C to +125°C
–55°C to +125°C
LINEARITY
ERROR MAX
(T
MIN
TO T
MAX
)
±1LSB
±1/2LSB
±1LSB
±1/2LSB
±1LSB
±3/4LSB
MODEL
ADC574AJP
ADC574AKP
ADC574AJH
ADC574AKH
ADC574ASH
ADC574ATH
PACKAGE
Plastic DIP
Plastic DIP
Ceramic DIP
Ceramic DIP
Ceramic DIP
Ceramic DIP
BURN-IN SCREENING OPTION
See text for details.
MODEL
ADC574AJP-BI
ADC574AKP-BI
ADC574AJH-BI
ADC574AKH-BI
ADC574ASH-BI
ADC574ATH-BI
PACKAGE
Plastic DIP
Plastic DIP
Ceramic DIP
Ceramic DIP
Ceramic DIP
Ceramic DIP
TEMPERATURE
RANGE
0°C to +75°C
0°C to +75°C
0°C to +75°C
0°C to +75°C
–55°C to +125°C
–55°C to +125°C
BURN-IN TEMP
(160 Hours)
+85°C
+85°C
+125°C
+125°C
+125°C
+125°C
PACKAGE INFORMATION
MODEL
ADC574AJP
ADC574AKP
ADC574AJH
ADC574AKH
ADC574ASH
ADC574ATH
PACKAGE
Plastic DIP
Plastic DIP
Ceramic DIP
Ceramic DIP
Ceramic DIP
Ceramic DIP
PACKAGE DRAWING
NUMBER
(1)
215
215
149
149
149
149
NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix D of Burr-Brown IC Data Book.
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.
®
ADC574A
4
DISCUSSION OF
SPECIFICATIONS
LINEARITY ERROR
Linearity error is defined as the deviation of actual code
transition values from the ideal transition values. Ideal
transition values lie on a line drawn through zero (or minus
full scale for bipolar operation) and plus full scale. The zero
value is located at an analog input value 1/2LSB before the
first code transition (000
H
to 001
H
). The full-scale value is
located at an analog value 3/2LSB beyond the last code
transition (FFE
H
to FFF
H
) (see Figure 1).
out the range. Thus, every input code width (quantum) must
have a finite width. If an input quantum has a value of zero
(a differential linearity error of –1LSB), a missing code will
occur.
ADC574AKP, KN, KH and TH grades are guaranteed to
have no missing codes to 12-bit resolution over their re-
spective specification temperature ranges.
UNIPOLAR OFFSET ERROR
An ADC574A connected for unipolar operation has an
analog input range of 0V to plus full scale. The first output
code transition should occur at an analog input value 1/2
LSB above 0V. Unipolar offset error is defined as the
deviation of the actual transition value from the ideal value.
The unipolar offset temperature coefficient specifies the
change of this transition value versus a change in ambient
temperature.
BIPOLAR OFFSET ERROR
A/D converter specifications have historically defined bipo-
lar offset as the first transition value above the minus full-
scale value. The ADC574A specification, however, follows
the terminology defined for the 574 converter several years
ago. Thus, bipolar offset is located near the midscale value
of 0V (bipolar zero) at the output code transition 7FF
H
to
800
H
.
Bipolar offset error for the ADC574A is defined as the
deviation of the actual transition value from the ideal
transition value located 1/2LSB below 0V. The bipolar
offset temperature coefficient specifies the maximum change
of the code transition value versus a change in ambient
temperature.
FULL SCALE CALIBRATION ERROR
The last output transition (FFE
H
to FFF
H
) occurs for an
analog input value 3/2LSB below the nominal full-scale
value. The full-scale calibration error is the deviation of the
actual analog value at the last transition point from the ideal
value. The full-scale calibration temperature coefficient
specifies the maximum change of the code transition value
versus a change in ambient temperature.
POWER SUPPLY SENSITIVITY
Electrical specifications for the ADC574A assume the
application of the rated power supply voltages of +5V and
±12V
or
±15V.
The major effect of power supply voltage
FFF
H
FFE
H
FFD
H
802
H
Digital Output
Full-Scale
Calibration
Error
Rotates
The
Line
801
H
800
H
7FF
H
7FE
H
002
H
001
H
000
H
1/2LSB
Zero
(–Full Scale)
(Bipolar
Offset
Transaction)
Midscale
(Bipolar
Zero)
Offset
Error
Shifts
The Line
Zero
1/2LSB
(–Full-Scale
Calibration
Transition)
Analog Input
3/2LSB
+Full
+Full-Scale Scale
Calibration
Transition
FIGURE 1. ADC574A Transfer Characteristics Terminology.
Thus, for a converter connected for biopolar operation and
with a full-scale range (or span) of 20V (±10V), the zero
value of –10V is 2.44mV below the first code transition
(000
H
to 001
H
at –9.99756V) and the plus full-scale value of
+10V is 7.32mV above the last code transition (FFE
H
to
FFF
H
at +9.99268) (see Table I).
NO MISSING CODES
(DIFFERENTIAL LINEARITY ERROR)
A specification which guarantees no missing codes requires
that every code combination to appear in a monotonically-
increasing sequence as the analog input is increased through-
BINARY (BIN) OUTPUT
Analog Input Voltage Range
One Least Significant Bit (LSB)
Defined as:
FSR
2
n
n=8
n =12
INPUT VOLTAGE RANGE AND LSB VALUES
±
10V
20V
2
n
78.13mV
4.88mV
+10V – 3/2LSB
0 – 1/2LSB
±
5V
10V
2
n
39.06mV
2.44mV
+5 – 3/2LSB
0 – 1/2LSB
0 to +10V
10V
2
n
39.06mV
2.44mV
+10V – 3/2LSB
+5V – 1/2LSB
0 to +20V
20V
2
n
78.13mV
4.88mV
+10V – 3/2LSB
±10V
– 1/2LSB
Output Transition Values
FFE
H
to FFF
H
7FF
H
to 800
H
+Full-Scale Calibration
Midscale Calibration (Bipolar Offset)
TABLE I. Input Voltages, Transition Values, and LSB Values.
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