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LTC1458IG Datasheet

  • LTC1458IG

  • 12-Bit Digital-to-Analog Converter

  • 202.87KB

  • 12頁

  • ETC

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LTC1458/LTC1458L
Quad 12-Bit Rail-to-Rail
Micropower DACs
FEATURES
s
s
s
s
s
s
s
s
DESCRIPTIO
s
s
s
s
Quad 12-Bit DAC
Buffered True Rail-to-Rail Voltage Output
Maximum DNL Error: 0.5LSB
5V Operation, I
CC
: 1.1mA Typ (LTC1458)
3V Operation, I
CC
: 800碌A(chǔ) Typ (LTC1458L)
Internal or External Reference Operation
Settling Time: 14碌s to
鹵0.5LSB
Schmitt Trigger On Clock Input Allows Direct
Optocoupler Interface
Power-On Reset and CLR Pin
SSOP-28 Package
3-Wire Cascadable Serial Interface with 250kHz
Update Rate
Low Cost
The LTC
廬
1458/LTC1458L are complete single supply,
quad rail-to-rail voltage output, 12-bit digital-to-analog
converters (DACs) in SO-28 and SSOP-28 packages. They
include an output buffer amplifier with variable gain (脳1 or
脳
2) and an easy-to-use 3-wire cascadable serial interface.
The LTC1458 has an onboard reference of 2.048V and a
full-scale output of 4.095V in a
脳
2 gain configuration. It
operates from a single 4.5V to 5.5V supply dissipating
only 5.5mW (I
CC
= 1.1mA typ).
The LTC1458L has an onboard 1.22V reference and a full-
scale output of 2.5V in a
脳2
gain configuration. It operates
from a single supply of 2.7V to 5.5V dissipating 2.4mW.
Excellent DNL, low supply current and a wide range of
built-in functions allow these parts to be used in a host of
applications when flexibility, power and single supply
operation are important.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
s
s
s
s
Digital Calibration
Industrial Process Control
Automatic Test Equipment
Low Power Systems
TYPICAL APPLICATIO
Control Outputs
Daisy-Chained
Functional Block Diagram: Quad 12-Bit Rail-to-Rail DAC
2.048V (LTC1458)
1.22V (LTC1458L)
REFOUT
REFHI C
FROM
碌P
5V (LTC1458)
3V TO 5V (LTC1458L)
D
IN
V
CC
0.5
CS/LD CLK
REFHI B
V
OUT C
X1/X2 C
REFLO C
REFHI D
V
OUT D
X1/X2 D
REFLO D
DAC C
48-BIT
SHIFT REGISTER
AND
DAC REGISTER
DAC D
DAC B
V
OUT B
DNL (LSB)
X1/X2 B
REFLO B
REFHI A
DAC A
V
OUT A
X1/X2 A
REFLO A
CLR
D
OUT
1458 BD01
U
Differential Nonlinearity
vs Input Code
0.4
0.3
0.2
0.1
0
鈥?.1
鈥?.2
鈥?.3
鈥?.4
鈥?.5
0
512 1024 1536 2048 2560 3072 3584 4095
CODE
1458 G09
U
U
1

LTC1458IG 產(chǎn)品屬性

  • LTC1458/L

  • 47

  • 集成電路 (IC)

  • 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器

  • -

  • 14µs

  • 12

  • 串行

  • 4

  • 單電源

  • 5.5mW

  • -40°C ~ 85°C

  • 表面貼裝

  • 28-SSOP（0.209"，5.30mm 寬）

  • 28-SSOP

  • 管件

  • 4 電壓，單極

  • *

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