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PDF LTC8143FN Data sheet ( Hoja de datos )
| Número de pieza | LTC8143FN | |
| Descripción | Improved Industry Standard Serial 12-Bit Multiplying DACs | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LTC8143FN (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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LTC7543/LTC8143
Improved Industry Standard
Serial 12-Bit Multiplying DACs
FEATURES
s Improved Direct Replacement for AD7543
and DAC-8143
s Low Cost
s DNL and INL Over Temperature: ±0.5LSB
s Easy, Fast and Flexible Serial Interface
s Daisy-Chain 3-Wire Interface for Multiple DAC
Systems (LTC8143)
s 1LSB Maximum Gain Error Over Temperature
Eliminates Adjustment
s Asynchronous Clear Input for Initialization
s Four-Quadrant Multiplication
s Low Power Consumption
s 16-Pin PDIP and SO Packages
U
APPLICATIONS
s Process Control and Industrial Automation
s Remote Microprocessor-Controlled Systems
s Digitally Controlled Filters and Power Supplies
s Programmable Gain Amplifiers
s Automatic Test Equipment
DESCRIPTION
The LTC®7543/LTC8143 are serial-input 12-bit multiply-
ing digital-to-analog converters (DACs). They are superior
pin compatible replacements for the AD7543 and
DAC-8143. Improvements include better accuracy, better
stability over temperature and supply variations, lower
sensitivity to output amplifier offset, tighter timing speci-
fications and lower output capacitance.
An easy-to-use serial interface includes an asynchronous
CLEAR input for systems requiring initialization to a known
state. The LTC8143 has a serial data output to allow daisy-
chaining multiple DACs on a 3-wire interface bus.
These DACs are extremely versatile. They can be used for
2-quadrant and 4-quadrant multiplying, programmable
gain and single supply applications, such as noninverting
voltage output and biased or offset ground mode.
Parts are available in 16-pin PDIP and SO packages and
are specified over the extended industrial temperature
range, – 40°C to 85°C.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATION
Multiplying DAC Has Easy 3-Wire Serial Interface
VIN
CLOCK
DATA
LOAD
5V
14 15 16
4 VDD VREF
STB1
RFB 1
OUT 1
7 SRI LTC7543
5 LD1
LTC8143
OUT 2
DGND
AGND 2
12 3
33pF
–
LT®1097
+
VOUT
7543/8143 TA01
Integral Nonlinearity Over Temperature
1.0
0.5
TA = 85°C TA = 25°C
0
TA = –40°C
–0.5
–1.0
0
512 1024 1536 2048 2560 3072 3584 4095
DIGITAL INPUT CODE
7543/8143 TA02
1
1 page  
BLOCK DIAGRAM
VREF 15
LTC7543/LTC8143
20k 20k
20k
16 RFB
40k 40k 40k
40k
40k
40k 40k 10k
CLR 13
LD1 5
LD2 9
VDD 14
DECODER
CLR BIT 1
(MSB)
LOAD
BIT 2
BIT 3
DAC REGISTER
BIT 4
BIT 12
(LSB)
STB1 4
STB2 8
STB3 10
STB4 11
CLK
OUT
INPUT 12-BIT SHIFT REGISTER
DGND 12
6 SRO
LTC8143 ONLY
IN
WU W
TI I G DIAGRA
STROBE INPUT
STB1, STB2, STB4
(INVERT FOR STB3)
tDS1
tDS2
tDS3
tDS4
tDH1
tDH2
tDH3
tDH4
SRI PREVIOUS
WORD
BIT 1
MSB
BIT 2
tSTB1
tSTB2
tSTB3
tSTB4
tSTB1
tSTB2
tSTB3
tSTB4
tSRI
BIT 11
1 OUT 1
2 OUT 2
3 AGND
7 SRI
7543/8143 BD
BIT 12
LSB
tASB
LD1, LD2
SRO
(LTC8143 ONLY)
BIT 1 (MSB)
PREVIOUS WORD
BIT 2
tPD
tPD1
BIT 3
tLD1
tLD2
BIT 12
LSB
BIT 1 (MSB)
CURRENT WORD
7543/8143 TD01
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet LTC8143FN.PDF ] | |
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