Datasheet LTC1287 (Analog Devices)

FabricanteAnalog Devices
Descripción3V Single Chip 12-Bit Data Acquisition System
Páginas / Página16 / 1 — FEATURES. DESCRIPTIO. KEY SPECIFICATIO S. APPLICATIO S. TYPICAL …
Formato / tamaño de archivoPDF / 328 Kb
Idioma del documentoInglés

FEATURES. DESCRIPTIO. KEY SPECIFICATIO S. APPLICATIO S. TYPICAL APPLICATIO. 3V Differential Input Data Acquisition System

Datasheet LTC1287 Analog Devices

Línea de modelo para esta hoja de datos

Versión de texto del documento

LTC1287 3V Single Chip 12-Bit Data Acquisition System
U FEATURES DESCRIPTIO
■ Single Supply 3.3V Operation The LTC®1287 is a 3V data acquisition component which ■ Built-In Sample-and-Hold contains a serial I/O successive approximation A/D con- ■ Direct 3-Wire Interface to Most MPU Serial Ports and verter. The device specifications are guaranteed at a All MPU Parallel Ports supply voltage of 2.7V. It uses LTCMOSTM switched ca- ■ 30kHz Maximum Throughput Rate pacitor technology to perform a 12-bit unipolar, A/D conversion. The differential input has an on-chip sample-
U KEY SPECIFICATIO S
and-hold on the (+) input. The serial I/O is designed to communicate without external ■ Minimum Guaranteed Supply Voltage: 2.7V hardware to most MPU serial ports and all MPU parallel ■ Resolution: 12 Bits I/O ports allowing data to be transmitted and received over ■ Fast Conversion Time: 24µs Max Over Temp. three wires. The low voltage operating capability and the ■ Low Supply Current: 1.0mA low power consumption of this device make it ideally suited for battery applications. Given the ease of use, small
U
package size and the minimum number of interconnects
APPLICATIO S
for I/O, the LTC1287 can be used for remote sensing ■ applications. Battery-Powered Instruments ■ Data Logger , LTC and LT are registered trademarks of Linear Technology Corporation. LTCMOS is a trademark of Linear Technology Corporation ■ Data Acquisition Modules
U TYPICAL APPLICATIO 3V Differential Input Data Acquisition System
22µF TANTALUM +
INL with VREF = 1.2V
1.0 CS VCC 3V 10k LITHIUM DIFFERENTIAL INPUTS + +IN CLK COMMON MODE RANGE LTC1287 0.5 0V TO VCC* – –IN DOUT GND VREF 0 + LT1004-1.2 22µF ERROR (LSB) TANTALUM –0.5 TO AND FROM MPU –1.0 0 512 1024 1536 2048 2560 3072 3584 4096 * FOR OVERVOLTAGE PROTECTION, LIMIT THE INPUT CURRENT TO 15mA PER PIN OR CLAMP THE INPUTS TO V CODE CC AND GND WITH 1N4148 DIODES. CONVERSION RESULTS ARE NOT VALID WHEN THE SELECTED CHANNEL OR LTC1287 TA02 OTHER CHANNEL IS OVERVOLTAGED (VIN < GND OR VIN > VCC). SEE SECTION ON OVERVOLTAGE PROTECTION IN THE APPLICATIONS INFORMATION. 1287 TA01 1287fa 1