AD1147_15 Datasheet, PDF (1/6 Pages) Analog Devices – MicroprocessoCrompatibl

rIII _{-ANALOG -}
MicroprocessoCrompatible
IAI' ^. DEVICES
[-
FEATURES
Low Nonlinearity
Differential: :t 0.000760/0max
Integral: :t 0.000760/0max
Differential TC: :t 1ppmrc max
Fast Settling
16-BitOJA Converters
. ^{AD1147/AD1148I}
AD1l47/ADll48 FUNCTIONAL BLOCK DIAGRAMS
10kU
10kU
SkU
Full Scale: 20 to :t 0.00076%
LSB: 3 to :t 0.00076%
OBSOLETE ^{LoWPower: 375mW Including Reference}
Functionally Complete
Internal Reference, Output Voltage Amplifier,
Input Latches and 8-Bit Latched Input DACs
for Offset and Gain Correction.
Full Four Quadrant Multiplying
Low Cost
APPUCATlONS
Automatic Test Equipment
Scientific Instrumentation
Beam Positioners
Robotics
Graphics Displays
GENERAL DESCRIPTION
The AD1l47 and AD1l48 are 16-bit resolution, hybrid, latched
891 8181
CMS8 C88
+v PGND -v.
27
R';:""--'" REF
OUT
IN
WiilM MS8 88
SkU
input, digital-to-analogconverters. Their tWO8-bit latched input
DACsallow direct offset and gain correction via microprocessor
interface.
The AD1147and ADl148 are constructed as hybrids ina compact
32-pin,triple wide dual~in-linepackage. PrecisionCMOS switches
anda laser-trimmed thin-fllm resistor -networkare used to provide
16-bitaccuracy and excellent temperature stability.
AD1148
The Main (l6-bit) DAC is loaded as a 16-bit word. The offset
and gain correction DACs are each loaded as 8-bit words. The
AD1l47 multiplexes both correction DACs' inputs with the
Main DAC's eight LSBs. This pin sharing allows for additional
pin connectionsproviding: exteri1alreference input, a current
output and feedback resistors for voltage output ranges of 0 to
+ SV,0 to + lOV, :t SVand :t lOV.
-
CMS8 C88
WRiM MS8 816
The ADl148 correction DACs' inputs are separate from the
Main DAC's. The gain correction DAC's inputs are multiplexed
- ^{with the offset DAC's 8-bit inputs. This allows for a separate 8-}
bit bus interface with the correction DACs common in appli-
cationssuch a&Automatic Test Equipment.
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