Electronic Components Datasheet Search |
|
AD7719 Datasheet(PDF) 1 Page - Analog Devices |
|
AD7719 Datasheet(HTML) 1 Page - Analog Devices |
1 / 40 page a AD7719 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective companies. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 www.analog.com Fax: 781/326-8703 © 2003 Analog Devices, Inc. All rights reserved. REV. A Low Voltage, Low Power, Factory-Calibrated 16-/24-Bit Dual - ADC FEATURES HIGH RESOLUTION - ADCs 2 Independent ADCs (16- and 24-Bit Resolution) Factory-Calibrated (Field Calibration Not Required) Output Settles in 1 Conversion Cycle (Single Conversion Mode) Programmable Gain Front End Simultaneous Sampling and Conversion of 2 Signal Sources Separate Reference Inputs for Each Channel Simultaneous 50 Hz and 60 Hz Rejection at 20 Hz Update Rate ISOURCE Select™ 24-Bit No Missing Codes—Main ADC 13-Bit p-p Resolution @ 20 Hz, 20 mV Range 18-Bit p-p Resolution @ 20 Hz, 2.56 V Range INTERFACE 3-Wire Serial SPI®, QSPI™, MICROWIRE™, and DSP Compatible Schmitt Trigger on SCLK POWER Specified for Single 3 V and 5 V Operation Normal: 1.5 mA Typ @ 3 V Power-Down: 10 A (32 kHz Crystal Running) ON-CHIP FUNCTIONS Rail-Rail Input Buffer and PGA 4-Bit Digital I/O Port On-Chip Temperature Sensor Dual Switchable Excitation Current Sources Low-Side Power Switches Reference Detect Circuit APPLICATIONS Sensor Measurement Temperature Measurement Pressure Measurement Weigh Scales Portable Instrumentation 4 to 20 mA Transmitters GENERAL DESCRIPTION The AD7719 is a complete analog front end for low frequency measurement applications. It contains two high resolution Σ-∆ ADCs, switchable matched excitation current sources, low-side power switches, digital I/O port, and temperature sensor. The 24-bit main channel with PGA accepts fully differential, unipolar, and bipolar input signal ranges from 1.024 × REFIN1/128 to 1.024 × REFIN1. Signals can be converted directly from a trans- ducer without the need for signal conditioning. The 16-bit auxiliary channel has an input signal range of REFIN2 or REFIN2/2. The device operates from a 32 kHz crystal with an on-chip PLL generating the required internal operating frequency. The output data rate from the part is software programmable. The peak-to-peak resolution from the part varies with the programmed gain and output data rate. The part operates from a single 3 V or 5 V supply. When oper- ating from 3 V supplies, the power dissipation for the part is 4.5 mW with both ADCs enabled and 2.85 mW with only the main ADC enabled in unbuffered mode. The AD7719 is housed in 28-lead SOIC and TSSOP packages. FUNCTIONAL BLOCK DIAGRAM MUX AVDD IEXC1 200 A IEXC2 200 A AVDD AGND BUF PGA MUX1 TEMP SENSOR I/O PORT AVDD MAIN CHANNEL 24-BIT - ADC AUXILIARY CHANNEL 16-BIT - ADC REFERENCE DETECT OSC. AND PLL SERIAL INTERFACE AND CONTROL LOGIC DVDD DGND IOUT1 IOUT2 AIN1 AIN2 AIN3 AIN4 AIN5 AIN6 AVDD AGND REFIN2 PWRGND P1/SW1 P2/SW2 P3 P4 DOUT DIN SCLK CS RDY RESET XTAL1 XTAL2 REFIN1(+) REFIN1(–) AD7719 MUX2 |
Similar Part No. - AD7719_15 |
|
Similar Description - AD7719_15 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |