LTC2633 datasheet(20/20 Pages) LINER

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LTC2644

2644fa

For more information www.linear.com/LTC2644

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LINEAR TECHNOLOGY CORPORATION 2014

LT 0217 REV A • PRINTED IN USA

LinearTechnology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408)432-1900 ● FAX: (408) 434-0507 ● www.linear.com/LTC2644

relaTeD parTs

Typical applicaTion

PART NUMBER

DESCRIPTION

COMMENTS

LTC2645

Quad 12-/10-/8-Bit PWM to VOUT DACs with

10ppm/°C Reference

Zero Latency Bus Update, 100kHz to 30Hz Input Frequency, ±2.5LSB INL,

2.7V to 5.5V Supply Range, 16-Lead MSOP Package

LT®1991

Precision, 100µA Gain Selectable Amplifier

Gain Accuracy of 0.04%, Gains from –13 to 14, 100µA Precision Op Amp

LT1469-2

Dual 200MHz, 30V/µs 16-Bit Accurate Op Amp 200MHz Gain Bandwidth, 125µV Offset, 30V/µs Slew Rate Precision Op Amp

LTC2055

Dual Micropower Zero-Drift Op Amp

2.7V Minimum Supply Voltage, 150µA Supply Current per Amplifier,

Zero-Drift Op Amp

LTC6992

Timer Blox: Voltage-Controlled Pulse Width

Modulator (PWM)

3.8Hz to 1MHz Output Frequency Range, 0V to 1V Analog Input, < 1.7% Maximum

Frequency Error

LTC2632/LTC2633 Dual 12-/10-/8-Bit SPI/I2C VOUT DACs with

10ppm/°C Reference

±2.5LSB INL, 2.7V to 5.5V Supply Range, 10ppm/°C Reference, External REF Mode,

8-Lead ThinSOT™ Package

Figure 4. Voltage Margining Application with LTC3850 (3.3V ±10%)

SW1

BG1

PGND

ITH1

SENSE1+

MODE/PLLIN

RUN1

SENSE1–

VFB1

500kHz

TKSS1

ILM

VIN

INTVCC

PGOOD

TG1

0.1µF

1nF

0.1µF

2.2k

100k

10k

SGND

10k

0.008k

2.2µH

LTC3850EUF

2645 F04

FREQ

BOOST1

0.1µF

CMDSH-3

RJK0305DPB

RJK0301DPB

10nF

1nF

3.32k

10k

1nF

10k

100pF

4.7µF

VIN

6.5V

TO 14V

VOUT

3.3V ±10%

20k

15pF

63.4k

0.1µF

PWM TO

BINARY

LTC2644 -12

PWM TO

BINARY

DAC A

REF

IOVCC VCC IDLSEL REFSEL

DAC B

VOUTB

VOUTB = Hi-Z

FOR NO MARGINING, KEEP INA LOW. (VOUTA = Hi-Z)

TO MARGIN 10% HIGH, SET INA DUTY CYCLE TO 1/4096 (VOUTA = 0V)

TO MARGIN 10% LOW, SET INA DUTY CYCLE TO 2621/4096 (VOUTA = 1.6V)

GND

VOUTA

INB

INA

0.1µF

10k

143k

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