ADC1143_15 Datasheet, PDF (1/4 Pages) Analog Devices – LOW POWER HIGH PERGORMANCE 16 BIT A/D CONVERTER

-.. ANALOG
W DEVICES
Low Power/HigPheriormance
16-BitAIDConverter
ADCl143
I
I
FEATURES
low Power Consumption:
175mW max, Vs = :!::15V
= 150mW max, Vs :!::12V
Guaranteed Nonlinearity:
:!::0.006% FSR max (ADC1143J)
:!::0.003% FSR max (ADC1143K)
Guaranteed Differential Nonlinearity:
:!::0.006% FSR max (ADC1143J)
OBSOLETE II :!::0.003% FSR max (ADC1143K)
low Differential Nonlinearity T.C.:
:!::2ppmrC max (ADC1143J)
:!::1ppmrC max (ADC1143K)
Fast Conversion Time:
70,..,s max (ADC1143J)
100J1.s max (ADC1143K)
Wide Power Supply Operation:
Vs=:!::11.4Vto :!::18.0V
Vo= +3.0V to +18.0V
APPLICATIONS
Seismic Data Acquisition
Oil Well Instrumentation
Portable Industrial Scales
Portable Test Equipment
Robotics
The ADCl143 can operate with power supply voltages ranging
from:!:: HAV dc to :!::18.0V dc for Vsand + 3V dc to + 18V
dc for the Vo supply. An internal voltage reference is provided,
but an external reference can be used. Five analog input voltage
ranges are selectable via user pin programming: + SV, + 1OV, I
+ lOV, :!::SV and:!:: IOV. Digital output coding in unipolar
operation is true binary; for bipolar operation, the coding is
offset binary or two's complement. Digital outputs are provided
in both parallel and serial formats.
GENERAL DESCRIPTION
The ADCl143 is a low power 16-bit successive-approximation
analog-to-digital converter with a maximum power consumption
of 17SmW at Vs = :!::lSV, ISOmW at Vs= :!::12V, and is contained
in a 2" x 2" x OA" module.
High performance like integral nonlinearity of :!:0: .006% FSR
(ADCI143J)/:!:: 0.003% FSR (ADCI143K) and differential non-
linearity of :!:0: .006% FSR (ADC1143J)/:!:: 0.003% FSR
(ADCI143K) are guaranteed. Additional guaranteed performance
includes: differential nonlinearity T.e. of:!:: 2ppmrC (ADClI43J)/
:!::IppmrC (ADCI143K), offset T.e. :!::40'J.v/oCand gain T.e.
:!::12ppmre.
The ADCl143 makes extensive use of CMOS integrated circuits
and thin-film components to obtain low power consumption,
excellent performance and small size. The internal 16-bit CMOS
DAC incorporates Analog Devices' proprietary thin-film resistor
technology and proprietary current steering switches. CMOS
successive-approximation registers, low power comparator and
low noise reference are also used to optimize the performance of
the ADCl143 (shown in Figure 1).
ADCTI43
g~~3~~ (2
gg~~~6(21
16.BIT CMOS
OlGITAL.TO.ANALOG
CONVERTER
16.SIT SUCCESSIVE
APPROXIMATION REGISTER
19 LSB
1S BIT 15
17 BIT 14
16 SIT 13
15 SIT 12
14 SIT 11
13 BIT 10
12 BIT 9
11 SIT S
10 BIT 7
9 BIT 6
S BIT 5
7 BIT 4
6 BIT 3
5 BIT 2
4 MSB
Figure 1. ADC1143 Functional Block Diagram
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