CMOS technology. This is a drop-in replacement for
ADC574 models in most applications, with internal
sampling, much lower power consumption, and capa-
bility to operate from a single +5V supply.
The ADS574 is complete with internal clock, micro-
processor interface, three-state outputs, and internal
scaling resistors for input ranges of 0V to +10V, 0V to
+20V,
±5V,
or
±10V.
The maximum throughput time
for 12-bit conversions is 25µs over the full operating
temperature range, including both acquisition and con-
version.
Complete user control over the internal sampling func-
tion facilitates elimination of external sample/hold
amplifiers in most existing designs.
The ADS574 requires +5V, with –12V or –15V op-
tional, depending on usage. No +15V supply is re-
quired. Available packages include 0.3" or 0.6" wide
28-pin plastic DIPs and 28-lead SOICs.
Status
Control
Inputs
Bipolar Offset
20V Range
10V Range
2.5V Reference
Input
2.5V Reference
Output
Control Logic
Three-State Buffers
CDAC
–
+
Clock
Successive
Approximation
Register
Parallel
Data
Output
Comparator
2.5V
Reference
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
NOTES: (1) With fixed 50Ω resistor from REF OUT to REF IN. This parameter is also adjustable to zero at +25°C. (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. (3) Maximum error at T
MIN
and T
MAX
. (4) Based on using V
EE
=
+5V, which starts a conversion immediately upon a convert command. Using V
EE
= 0V to –15V makes the ADS574/ADS774 emulate standard ADC574 operation.
In this mode, the internal sample/hold acquires the input signal after receiving the convert command, and does not assume that the input level has been stable
before the convert command arrives. (5) Using internal reference. (6) This is worst case change in accuracy from accuracy with a +5V supply. (7) V
EE
is optional,
and is only used to set the mode for the internal sample/hold. When V
EE
= –15V, I
EE
= –1mA typ; when V
EE
= 0V, I
EE
=
±5µA
typ; when V
EE
= +5V, I
EE
= +167µA
typ.
ABSOLUTE MAXIMUM RATINGS
V
EE
to Digital Common ....................................................... +V
DD
to –16.5V
V
DD
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
DD
+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
DD
Max Junction Temperature ............................................................ +165°C
Power Dissipation ........................................................................ 1000mW
Lead Temperature (soldering,10s) ................................................. +300°C
This integrated circuit can be damaged by ESD. Burr-Brown
recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.
ESD damage can range from subtle performance degrada-
tion to complete device failure. Precision integrated circuits
may be more susceptible to damage because very small
parametric changes could cause the device not to meet its
published specifications.
PACKAGE/ORDERING INFORMATION
PRODUCT
ADS574JE
ADS574KE
ADS574JP
ADS574KP
ADS574JU
ADS574KU
PACKAGE
0.3" Plastic DIP
0.3" Plastic DIP
0.6" Plastic DIP
0.6" Plastic DIP
SOIC
SOIC
PACKAGE DRAWING
NUMBER
(1)
246
246
215
215
217
217
SINAD
(2)
68
70
68
70
68
70
TEMPERATURE
RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
LINEARITY
ERROR (LSB)
±1
±1/2
±1
±1/2
±1
±1/2
NOTES: (1) For detailed drawing and dimension table, please see end of data sheet, or Appendix C of Burr-Brown IC Data Book. (2) SINAD is Signal-to-(Noise
and Distortion) expressed in dB.
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.
®
3
ADS574
CONNECTION DIAGRAM
+5VDC Supply
(V
DD
)
–
12/8
CS
A
O
–
R/C
CE
NC*
2.5V Ref
Out
Analog
Common
2.5V Ref
In
V
EE
(Mode Control)
1
2
3
4
5
6
7
8
9
10
11
2.5V
Reference
12 Bits
Control
Logic
Nibble A
Power-Up Reset
28
27
26
25
24
23
Nibble B
22
21
20
19
18
17
16
15
Status
DB11 (MSB)
DB10
DB9
DB8
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0 (LSB)
Digital
Common
Succesive Approximation Register
Clock
12
Bits
Three-State Buffers and Control
Bipolar 12
Offset
10V Range 13
20V Range
14
–
CDAC
+
*Not Internally Connected
®
ADS574
4
Nibble C
TYPICAL PERFORMANCE CURVES
At T
A
= +25°C, V
DD
= V
EE
= +5V; Bipolar
±10V
Input Range; sampling frequency of 40kHz; unless otherwise specified. All plots use 4096 point FFTs.
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