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AD7766BRUZ-1 Fiches technique(PDF) 1 Page - Analog Devices |
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AD7766BRUZ-1 Fiches technique(HTML) 1 Page - Analog Devices |
1 / 18 page 24-Bit, 10mW, 125ksps Analog to Digital Converter in 16 lead TSSOP Preliminary Technical Data AD7766 Rev. PrD Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2006 Analog Devices, Inc. All rights reserved. FEATURES High performance 24-bit ADC 114dB SNR at 31.25 KHz output data rate 111dB SNR at 62.5 KHz output data rate 108dB SNR at 125 KHz output data rate Max 20mW Power Consumption 10mW typ at 31.25 KHz output data rate 12mW typ at 62.5 KHz output data rate 15 mW typ at 125 KHz output data rate High DC accuracy 24 Bits No Missing Codes (NMC) Integral Non Linearity 15 ppm Low temperature drift Offset Drift ±25 nV/°C On Chip Low pass FIR filter Linear Phase Response Passband Ripple: ±0.005dB Stopband Attenuation: 100dB 2.5V Supply with 1.8V/2.5V/3V/3.6V logic interface Flexible Interfacing options Synchronization of multiple devices Daisy Chain capability Temp Range -40oC to 105oC APPLICATIONS Low-Power PCI/USB Data Acquisition Systems Low-Power Wireless Acquisition Systems Vibration Analysis Instrumentation FUNCTIONAL BLOCK DIAGRAM CONVERTER FIR FILTER DIGITAL & SERIAL INTERFACE CONTROL LOGIC VIN+ VIN- VDRIVE AVDD DVDD REFGND SYNC/PD MCLK SCLK SDI SDO CS DGND VREF+ AGND DRDY AD7766-2 AD7766/ AD7766-1/ Figure 1. PRODUCT OVERVIEW The AD7766 is high performance 24-bit over-sampled analog to digital converter combining wide dynamic range and input bandwidth with an on chip FIR filter while consuming only 20mW max power in a 16 pin TSSOP package. Specifically designed for ultra low power data acquisition, providing 24-bit resolution and high SNR makes the device ideal for measuring small signal changes over a wide dynamic range. This is particularly important in many data acquisition applications where small changes are measured on larger AC or DC signals. In addition the AD7766 provides excellent DC accuracy and drift specifications making the device suitable where DC data also needs to be acquired. The AD7766 improves SNR performance and simplifies anti aliasing requirements through over-sampling which is important in minimizing input signal distortion to the inputs of the ADC. A high performance on-chip FIR filter subsequently filters the over-sampled data and removes out of band noise. A SYNC/PD (Synchronisation/Power down) pin is an added feature, allowing for easy synchronization of multiple devices. The device operates from -40oC to 105oC. By combining wide dynamic range and high SNR at output data rates up to 125ksps with ultra low power the AD7766 provides a compact solution for low power data acquisition such as PCI or USB based systems. RELATED DEVICES Table 1. 24 bit Analog to Digital Converters Part No Speed Description AD7760 2.5MSPs 100dB Dynamic Range1 On-board Diff Amp & Ref Buffer Parallel, Variable Decimation AD7762/3 625KSPs 109dB Dynamic Range1 On-Board Diff Amp & Ref buffer Parallel/Serial, Variable Decimation AD7764 312KSps 109dB Dynamic Range1 On-board Diff Amp & Ref Buffer Serial, Variable Decimation (pin) AD7765 156KSPs 112dB Dynamic Range1 On-board Diff Amp & Ref Buffer Serial,Variable Decimation (pin) AD7767 125KSPs 109dB Dynamic Range1 10mW power dissipation Serial interface 1 Dynamic Range at max output data rate. |
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