DC887A datasheet, PDF - EEWORLD Datasheet

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DC887A: Descriptionboard sar adc ltc1408; CategoryDevelopment board/suite/development tools; File Size477KB，20 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html; Environmental Compliance

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board sar adc ltc1408

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LTC1408

6 Channel, 14-Bit, 600ksps

Simultaneous Sampling ADC

with Shutdown

DESCRIPTIO

The LTC

1408 is a 14-bit, 600ksps ADC with six simulta-

neously sampled differential inputs. The device draws

only 5mA from a single 3V supply, and comes in a tiny 32

pin (5mm

5mm) QFN package. A SLEEP shutdown

feature lowers power consumption to 6µW. The combina-

tion of low power and tiny package makes the LTC1408

suitable for portable applications.

The LTC1408 contains six separate differential inputs that

are sampled simultaneously on the rising edge of the

CONV signal. These six sampled inputs are then

converted at a rate of 100ksps per channel.

The 90dB common mode rejection allows users to

eliminate ground loops and common mode noise by

measuring signals differentially from the source.

The device converts 0V to 2.5V unipolar inputs differen-

tially, or

±1.25V

bipolar inputs also differentially,

depending on the state of the BIP pin. Any analog input

may swing rail-to-rail as long as the differential input

range is maintained.

The conversion sequence can be abbreviated to convert

fewer than six channels, depending on the logic state of

the SEL2, SEL1 and SEL0 inputs.

The serial interface sends out the six conversion results in

96 clocks for compatibility with standard serial interfaces.

FEATURES

■

600ksps ADC with 6 Simultaneously Sampled

Differential Inputs

100ksps Throughput per Channel

76dB SINAD

Low Power Dissipation: 15mW

3V Single Supply Operation

2.5V Internal Bandgap Reference, Can be Overdriven

with External Reference

3-Wire Serial Interface

Internal Conversion Triggered by CONV

SLEEP (6µW) Shutdown Mode

NAP (3.3mW) Shutdown Mode

0V to 2.5V Unipolar, or

±1.25V

Bipolar Differential

Input Range

90dB Common Mode Rejection

Tiny 32-Pin (5mm

5mm) QFN Package

APPLICATIO S

■

Multiphase Power Measurement

Multiphase Motor Control

Data Acquisition Systems

Uninterruptable Power Supplies

, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All

other trademarks are the property of their respective owners. Protected by U.S. Patents

including 6084440, 6522187.

BLOCK DIAGRA

CH5

–

CH5

CH4

–

CH4

CH3

–

CH3

CH2

–

CH2

CH1

–

CH1

CH0

–

CH0

10µF

–

S AND H

–

S AND H

600ksps

14-BIT ADC

MUX

TIMING

LOGIC

REF

10µF

BIP

1408 TA01

2.5V

REFERENCE

GND

14-BIT LATCH 0

14-BIT LATCH 1

14-BIT LATCH 2

14-BIT LATCH 3

14-BIT LATCH 4

14-BIT LATCH 5

SD0

0.1µF

OGND

THREE-

STATE

SERIAL

OUTPUT

PORT

CONV

SCK

DGND

SEL2 SEL1 SEL0

1408fa

DC887A Related Products

	DC887A	LTC1408IUH#TRPBF	LTC1408IUH#PBF	LTC1408CUH#TRPBF	LTC1408CUH#PBF
Description	board sar adc ltc1408	IC ADC 14BIT 600KSPS 32-QFN	IC ADC 14BIT 600KSPS 32-QFN	IC ADC 14BIT 600KSPS 32-QFN	IC ADC 14BIT 600KSPS 32-QFN
Number of digits	-	14	14	14	14

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