Datasheet > LTBGS

LTBGS

更新时间： 2024-11-24 05:43:39

品牌	Logo	应用领域
凌特 - Linear		/
页数	文件大小	规格书
20页	412K
描述
Serial 12-Bit/14-Bit, 2.8Msps Sampling ADCs with Shutdown

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LTBGS 数据手册

LTC1403-1/LTC1403A-1

Serial 12-Bit/14-Bit, 2.8Msps

Sampling ADCs with Shutdown

FEATURES

DESCRIPTIO

The LTC^®1403-1/LTC1403A-1 are 12-bit/14-bit, 2.8Msps

serial ADCs with differential inputs. The devices draw only

4.7mA from a single 3V supply and come in a tiny 10-lead

MSE package. A Sleep shutdown feature lowers power

consumption to 10µW. The combination of speed, low

powerandtinypackagemakestheLTC1403-1/LTC1403A-1

suitable for high speed, portable applications.

■

2.8Msps Conversion Rate

■

Low Power Dissipation: 14mW

■

3V Single Supply Operation

■

2.5V Internal Bandgap Reference can be Overdriven

■

3-Wire Serial Interface

■

Sleep (10µW) Shutdown Mode

■

Nap (3mW) Shutdown Mode

■

80dB Common Mode Rejection

The 80dB common mode rejection allows users to elimi-

nategroundloopsandcommonmodenoisebymeasuring

signals differentially from the source.

■

±1.25V Bipolar Input Range

■

Tiny 10-Lead MSE Package

The devices convert –1.25V to 1.25V bipolar inputs differ-

entially. The absolute voltage swing for +A_INand

–A_INextends from ground to the supply voltage.

APPLICATIO S

■

Communications

■

The serial interface sends out the conversion results

during the 16 clock cycles following CONV↑ for compat-

ibility with standard serial interfaces. If two additional

clock cycles for acquisition time are allowed after the data

stream in between conversions, the full sampling rate of

2.8Msps can be achieved with a 50.4MHz clock.

Data Acquisition Systems

■

Uninterrupted Power Supplies

■

Multiphase Motor Control

■

Multiplexed Data Acquisition

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

BLOCK DIAGRA

THD, 2nd and 3rd vs Input

10µF 3V

Frequency for Differential Input

Signals

–44

LTC1403A-1

–50

–56

–

THREE-

STATE

SERIAL

OUTPUT

PORT

–62

14-BIT ADC

SDO

S & H

–68

–74

–

THD 3rd

2nd

–80

–86

REF

CONV

SCK

2.5V

REFERENCE

TIMING

LOGIC

10µF

–92

GND

–98

–104

14031 BD

0.1

100

EXPOSED PAD

FREQUENCY (MHz)

14031 G19

14031f

12 3 4 5 6 7...20

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