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LTC1426CS8#TRPBF

Description
6 位数模转换器 2 8-SOIC
Categorysemiconductor    ADC/DAC - professional data collection   
File Size949KB,12 Pages
ManufacturerADI
Websitehttps://www.analog.com
Environmental Compliance
Download Datasheet Parametric View All

LTC1426CS8#TRPBF Overview

6 位数模转换器 2 8-SOIC

LTC1426CS8#TRPBF Parametric

Parameter NameAttribute value
category
MakerADI
series-
PackageTape and Reel (TR)
Number of digits6
Number of digital-to-analog converters2
Setup time-
Output typeVoltage - Buffered
Differential outputnone
Data interfacePWM
Reference typeexternal
Voltage - Power Supply, Analog2.7V ~ 5.5V
Voltage - Power Supply, Digital2.7V ~ 5.5V
INL/DNL (LSB)±0.05(最大),±0.05(最大)
Architecture计数,PWM
Operating temperature0°C ~ 70°C
Package/casing8-SOIC (0.154", 3.90mm wide)
Supplier device packaging8-SOIC
Installation typesurface mount type
Basic product numberLTC1426
LTC1426
Micropower
Dual 6-Bit PWM DAC
FEATURES
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DESCRIPTION
The
LTC
®
1426
is a dual micropower 6-bit PWM DAC fea-
turing versatile PWM outputs and a flexible pushbutton
compatible digital interface. The DAC outputs provide a
PWM signal that swings from 0V to V
REF
, allowing the
full-scale output to be varied by adjusting the voltage at
V
REF
. The PWM output frequency is typically 5kHz, easing
output filtering requirements. V
CC
supply current is typi-
cally 50µA and drops to 0.2µA in shutdown.
The LTC1426 can be controlled using one of two inter-
face modes: pushbutton and pulse. The LTC1426 auto-
matically configures itself into the appropriate mode at
start-up by monitoring the state of the CLK pins. In push-
button mode, the CLK pins can be directly connected
to external pushbuttons to control the DAC output. In
pulse mode, the CLK pins can be connected to CMOS
compatible logic. The DAC outputs initially power up at
half scale and the contents of the internal DAC registers
are retained in shutdown.
The LTC1426 is available in 8-pin MSOP and SO packages.
All registered trademarks and trademarks are the property of their respective owners.
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Wide Supply Range: 2.7V ≤ V
CC
≤ 5.5V
Wide Reference Voltage Range: 0V to 5.5V
Two Interface Modes:
Pulse Mode (Increment Only)
Pushbutton Mode (Increment/Decrement)
Low Supply Current: 50µA
0.2µA Supply Current in Shutdown
Available in 8-Pin MSOP and SO Packages
DAC Contents Are Retained in Shutdown
DACs Power-Up at Midrange
Low Output Impedance: < 100Ω
Output Frequency: 5kHz Typ
APPLICATIONS
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LCD Contrast and Backlight Brightness Control
Power Supply Voltage Adjustment
Battery Charger Voltage and Current Adjustment
GaAs FET Bias Adjustment
Trimmer Pot Elimination
TYPICAL APPLICATION
Pushbutton Adjustable CCFL/LCD Contrast Generator
UP TO 6mA
LAMP
HIGH VOLTAGE
ROYER
16
15
14
13
12
11
10
9
5V
C9
2.2µF
8V TO
28V
C10
2.2µF
35V
5V
R
SHDN
1M
C1
0.1µF
R1
44.2k
1%
R2
44.2k
1%
C2
1µF
C7 1µF
I
CCFL
= 0µA TO 50µA
1
2
3
4
5
6
7
CCFL PGND CCFL V
SW
I
CCFL
DIO
CCFL V
C
AGND
SHDN
LCD V
C
LT1182
BULB
BAT
ROYER
V
IN
FBP
FBN
LCD V
SW
R
P1
47k
UP
R
P2
47k
UP CONTRAST
UP/DOWN 1
CCFL UP/DOWN 2
SHDN
+
LTC1426
CLK1
CLK2
GND
SHDN
V
CC
V
REF
8
7
6
5
R5
20k
1%
C4
0.1µF
DOWN
DOWN
3
4
PWM1 PWM2
R3
5.1k
1%
R4
4.99k
1%
C3
10µF
R7 8
C8 10k
LCD PGND
0.68µF
+
C11
2.2µF
35V
LCD
CONTRAST
CONVERTER
V
OUT
NEGATIVE
LCD CONTRAST
V
OUT
= –10V TO –30V
Rev A
1426 TA01
R6
40k
1%
CONSULT THE LT1182 DATA SHEET FOR
DETAILS ON THE HIGH VOLTAGE ROYER
AND LCD CONTRAST CONVERTER SECTIONS
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