LTC1426CMS8#PBF datasheet, PDF

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LTC1426CMS8#PBF: DescriptionIC PWM D/A CONV 6BIT DUAL 8-MSOP; CategoryAnalog mixed-signal IC converter; File Size949KB，12 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html; Environmental Compliance

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LTC1426CMS8#PBF Overview

IC PWM D/A CONV 6BIT DUAL 8-MSOP

LTC1426CMS8#PBF Parametric

Parameter Name	Attribute value
Brand Name	Linear Technology
Is it Rohs certified?	conform to
Maker	Linear ( ADI )
Parts packaging code	MSOP
package instruction	SOP,
Contacts	8
Manufacturer packaging code	MS8
Reach Compliance Code	compliant
ECCN code	EAR99
Maximum analog output voltage	5.5 V
Minimum analog output voltage
Converter type	D/A CONVERTER
Enter bit code	BINARY
Input format	SERIAL
JESD-30 code	R-PDSO-G8
JESD-609 code	e3
length	4.9 mm
Maximum linear error (EL)	0.0781%
Humidity sensitivity level	1
Number of digits	6
Number of functions	2
Number of terminals	8
Maximum operating temperature	70 °C
Minimum operating temperature
Package body material	PLASTIC/EPOXY
encapsulated code	SOP
Package shape	RECTANGULAR
Package form	SMALL OUTLINE
Peak Reflow Temperature (Celsius)	260
Certification status	Not Qualified
Maximum seat height	1.75 mm
Maximum slew rate	0.1 mA
Nominal supply voltage	5 V
surface mount	YES
Temperature level	COMMERCIAL
Terminal surface	Matte Tin (Sn)
Terminal form	GULL WING
Terminal pitch	1.27 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	30
width	3.9 mm

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LTC1426

Micropower

Dual 6-Bit PWM DAC

FEATURES

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

REF

. The PWM output frequency is typically 5kHz, easing

output filtering requirements. V

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.

Wide Supply Range: 2.7V ≤ V

≤ 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

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

2.2µF

8V TO

28V

C10

2.2µF

35V

SHDN

0.1µF

44.2k

1µF

C7 1µF

CCFL

= 0µA TO 50µA

CCFL PGND CCFL V

CCFL

DIO

CCFL V

AGND

SHDN

LCD V

LT1182

BULB

BAT

ROYER

FBP

FBN

LCD V

47k

UP CONTRAST

UP/DOWN 1

CCFL UP/DOWN 2

SHDN

LTC1426

CLK1

CLK2

GND

SHDN

REF

20k

0.1µF

DOWN

PWM1 PWM2

5.1k

4.99k

10µF

R7 8

C8 10k

LCD PGND

0.68µF

C11

2.2µF

35V

LCD

CONTRAST

CONVERTER

OUT

NEGATIVE

LCD CONTRAST

OUT

= –10V TO –30V

Rev A

1426 TA01

40k

CONSULT THE LT1182 DATA SHEET FOR

DETAILS ON THE HIGH VOLTAGE ROYER

AND LCD CONTRAST CONVERTER SECTIONS

Document Feedback

For more information

www.analog.com

LTC1426CMS8#PBF Related Products

	LTC1426CMS8#PBF	LTC1426CS8#TRPBF	LTC1426CS8#PBF	LTC1426IS8#TRPBF	LTC1426IS8#PBF	LTC1426CMS8#TRPBF
Description	IC PWM D/A CONV 6BIT DUAL 8-MSOP	IC PWM D/A CONV 6BIT DUAL 8-SOIC	IC PWM D/A CONV 6BIT DUAL 8-SOIC	IC PWM D/A CONV 6BIT DUAL 8-SOIC	IC PWM D/A CONV 6BIT DUAL 8-SOIC	IC PWM D/A CONV 6BIT DUAL 8-MSOP
Brand Name	Linear Technology	Linear Technology	Linear Technology	Linear Technology	Linear Technology	Linear Technology
Is it Rohs certified?	conform to	conform to	conform to	conform to	conform to	conform to
Maker	Linear ( ADI )	Linear ( ADI )	Linear ( ADI )	Linear ( ADI )	Linear ( ADI )	Linear ( ADI )
Parts packaging code	MSOP	SOIC	SOIC	SOIC	SOIC	MSOP
package instruction	SOP,	SOP,	SOP,	SOP,	SOP,	SOP,
Contacts	8	8	8	8	8	8
Manufacturer packaging code	MS8	S8	S8	S8	S8	MS8
Reach Compliance Code	compliant	compliant	compliant	compliant	compliant	compliant
ECCN code	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99
Maximum analog output voltage	5.5 V	5.5 V	5.5 V	5.5 V	5.5 V	5.5 V
Converter type	D/A CONVERTER	D/A CONVERTER	D/A CONVERTER	D/A CONVERTER	D/A CONVERTER	D/A CONVERTER
Enter bit code	BINARY	BINARY	BINARY	BINARY	BINARY	BINARY
Input format	SERIAL	SERIAL	SERIAL	SERIAL	SERIAL	SERIAL
JESD-30 code	R-PDSO-G8	R-PDSO-G8	R-PDSO-G8	R-PDSO-G8	R-PDSO-G8	R-PDSO-G8
JESD-609 code	e3	e3	e3	e3	e3	e3
length	4.9 mm	4.9 mm	4.9 mm	4.9 mm	4.9 mm	4.9 mm
Maximum linear error (EL)	0.0781%	0.0781%	0.0781%	0.0781%	0.0781%	0.0781%
Humidity sensitivity level	1	1	1	1	1	1
Number of digits	6	6	6	6	6	6
Number of functions	2	2	2	2	2	2
Number of terminals	8	8	8	8	8	8
Maximum operating temperature	70 °C	70 °C	70 °C	85 °C	85 °C	70 °C
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	SOP	SOP	SOP	SOP	SOP	SOP
Package shape	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR
Package form	SMALL OUTLINE	SMALL OUTLINE	SMALL OUTLINE	SMALL OUTLINE	SMALL OUTLINE	SMALL OUTLINE
Peak Reflow Temperature (Celsius)	260	250	260	260	260	260
Certification status	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified
Maximum seat height	1.75 mm	1.75 mm	1.75 mm	1.75 mm	1.75 mm	1.75 mm
Maximum slew rate	0.1 mA	0.1 mA	0.1 mA	0.1 mA	0.1 mA	0.1 mA
Nominal supply voltage	5 V	5 V	5 V	5 V	5 V	5 V
surface mount	YES	YES	YES	YES	YES	YES
Temperature level	COMMERCIAL	COMMERCIAL	COMMERCIAL	INDUSTRIAL	INDUSTRIAL	COMMERCIAL
Terminal surface	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)
Terminal form	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING
Terminal pitch	1.27 mm	1.27 mm	1.27 mm	1.27 mm	1.27 mm	1.27 mm
Terminal location	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL
Maximum time at peak reflow temperature	30	NOT SPECIFIED	30	30	30	30
width	3.9 mm	3.9 mm	3.9 mm	3.9 mm	3.9 mm	3.9 mm

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