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AD7766BRUZ-1 Datasheet(PDF) 1 Page - Analog Devices

Part # AD7766BRUZ-1
Description  24-Bit, 10mW, 125ksps Analog to Digital Converter in 16 lead TSSOP
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7766BRUZ-1 Datasheet(HTML) 1 Page - Analog Devices

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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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