LTC1401IS8-TRPBF(RevA) Ver la hoja de datos (PDF) - Linear Technology

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LTC1401IS8-TRPBF
(Rev.:RevA)

Complete SO-8, 12-Bit, 200ksps ADC with Shutdown

Linear Technology 

FEATURES

■ Complete 12-Bit ADC with Reference in SO-8

■ Single Supply 3V Operation

■ Sample Rate: 200ksps

■ Power Dissipation: 15mW (Typ)

■ 68dB S/(N + D) and – 72dB THD at 50kHz

■ No Missing Codes Over Temperature

■ Nap Mode with Instant Wake-Up: 1.5mW

■ Sleep Mode: 19.5µW

■ Shutdown Mode: 13.5µW

■ High Impedance Analog Input

■ Input Range (0.5mV/LSB): 0V to 2.048V

■ Internal Reference Can Be Overdriven Externally

■ 3-Wire Interface to DSPs and Processors (SPI and

MICROWIRETM Compatible)

U

APPLICATIO S

■ Low Power and Battery-Operated Systems

■ Handheld or Portable Instruments

■ High Speed Data Acquisition

■ Digital Signal Processing

■ Multiplexed Data Acquisition Systems

■ Telecommunication

■ Digital Radio

■ Spectrum Analysis

LTC1401

Complete

SO-8, 12-Bit, 200ksps

ADC with Shutdown

DESCRIPTIO

The LTC ®1401 is a complete 200ksps, 12-bit A/D con-

verter that converts 0V to 2.048V unipolar input and draws

only 15mW from a single 3V supply. This easy-to-use

device comes complete with a 315ns sample-and-hold

and a precision reference. Maximum DC specifications

include ±1LSB INL, ±1LSB DNL and 45ppm/°C full-scale

drift over temperature.

The LTC1401 has three power saving modes: Nap and

Sleep, through the serial interface and Shutdown by

setting the SHDN pin to zero. In Nap mode, it consumes

only 1.5mW of power and can wake up and convert

immediately. In Sleep (Shutdown) mode, it consumes

19.5µW (13.5µW) of power typically. Upon power-up

from Sleep or Shutdown mode, a reference ready (REFRDY)

signal is available in the serial word to indicate that the

reference has settled and the chip is ready to convert.

The 3-wire serial port allows compact and efficient data

transfer to a wide range of microprocessors, microcon-

trollers and DSPs.

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

All other trademarks are the property of their respective owners.

TYPICAL APPLICATIO

Single 3V Supply, 200kHz, 12-Bit Sampling A/D Converter

3V

+

10µF

ANALOG INPUT

(0V TO 2.048V)

1.20V +

10µF

VCC

SHDN

0.1µF

LTC1401

AIN

CONV

VREF

0.1µF GND

CLK

DOUT

MPU

P1.4

SERIAL

DATA LINK

P1.3

P1.2

1401 TA01

Power Consumption vs Sample Rate

100

3.2MHz CLOCK

TA = 25°C

10

NORMAL CONVERSION

NAP MODE

1

BETWEEN CONVERSION

0.1

SHUTDOWN MODE

0.01

BETWEEN CONVERSION

SLEEP MODE BETWEEN

CONVERSION

0.001

0.01 0.1 1 10 100 1k 10k 100k 1M

SAMPLE RATE (Hz)

LTC1401 • TA02

1401fa

1

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