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AD7767 Datasheet(PDF) 1 Page - Analog Devices |
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AD7767 Datasheet(HTML) 1 Page - Analog Devices |
1 / 25 page 24-Bit, 8.5 mW, 109 dB, 128 kSPS/64 kSPS/32 kSPS ADCs AD7767 Rev. C Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother 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 ©2007–2010 Analog Devices, Inc. All rights reserved. FEATURES Oversampled successive approximation (SAR) architecture High performance ac and dc accuracy, low power 115.5 dB dynamic range, 32 kSPS (AD7767-2) 112.5 dB dynamic range, 64 kSPS (AD7767-1) 109.5 dB dynamic range, 128 kSPS (AD7767) −118 dB THD Exceptionally low power 8.5 mW, 32 kSPS (AD7767-2) 10.5 mW, 64 kSPS (AD7767-1) 15 mW, 128 kSPS (AD7767) High dc accuracy 24 bits, no missing codes (NMC) INL: ±3 ppm (typical), ±7.6 ppm (maximum) Low temperature drift Zero error drift: 15 nV/°C Gain error drift: 0.4 ppm/°C On-chip low-pass FIR filter Linear phase response Pass-band ripple: ±0.005 dB Stop-band attenuation: 100 dB 2.5 V supply with 1.8 V/2.5 V/3 V/3.6 V logic interface options Flexible interfacing options Synchronization of multiple devices Daisy-chain capability Power-down function Temperature range: −40°C to +105°C APPLICATIONS Low power PCI/USB data acquisition systems Low power wireless acquisition systems Vibration analysis Instrumentation High precision medical acquisition FUNCTIONAL BLOCK DIAGRAM VREF+ VIN+ VIN– REFGND AVDD AGND MCLK DVDD VDRIVE DGND SUCCESSIVE APPROXIMATION ADC DIGITAL FIR FILTER SERIAL INTERFACE AND CONTROL LOGIC SCLK DRDY SDO SDI AD7767/ AD7767-1/ AD7767-2 CS SYNC/PD Figure 1. GENERAL DESCRIPTION The AD7767/AD7767-1/AD7767-2 are high performance, 24-bit, oversampled SAR analog-to-digital converters (ADCs). The AD7767/AD7767-1/AD7767-2 combine the benefits of a large dynamic range and input bandwidth, consuming 15 mW, 10.5 mW, and 8.5 mW power, respectively, and are contained in a 16-lead TSSOP package. Ideal for ultralow power data acquisition (such as PCI- and USB-based systems), the AD7767/AD7767-1/AD7767-2 provide 24-bit resolution. The combination of exceptional SNR, wide dynamic range, and outstanding dc accuracy make the AD7767/AD7767-1/AD7767-2 ideally suited for measuring small signal changes over a wide dynamic range. This is particularly suitable for applications where small changes on the input are measured on larger ac or dc signals. In such an application, the AD7767/AD7767-1/AD7767-2 accurately gather both ac and dc information. The AD7767/AD7767-1/AD7767-2 include an on-board digital filter (complete with linear phase response) that acts to elimi- nate out-of-band noise by filtering the oversampled input voltage. The oversampled architecture also reduces front-end antialias requirements. Other features of the AD7767 include a SYNC/PD (synchronization/power-down) pin, allowing the synchronization of multiple AD7767 devices. The addition of an SDI pin provides the option of daisy chaining multiple AD7767 devices. The AD7767/AD7767-1/AD7767-2 operate from a 2.5 V supply using a 5 V reference. The devices operate from −40°C to +105°C. RELATED DEVICES Table 1. 24-Bit ADCs Part No. Description AD7760 2.5 MSPS, 100 dB dynamic range,1 on-board differential amp and reference buffer, parallel, variable decimation AD7762/ AD7763 625 kSPS, 109 dB dynamic range,1 on-board differential amp and reference buffer, parallel/serial, variable decimation AD7764 312 kSPS, 109 dB dynamic range,1 on-board differential amp and reference buffer, variable decimation (pin) AD7765 156 kSPS, 112 dB dynamic range,1 on-board differential amp and reference buffer, variable decimation (pin) AD7766 128 kSPS, 109.5 dB,1 15 mW, 16-bit INL, serial interface AD7766-1 64 kSPS 112.5 dB,110.5 mW, 16-bit INL, serial interface AD7766-2 32 kSPS, 115.5 dB,1 8.5 mW, 16-bit INL, serial interface 1 Dynamic range at maximum output data rate. |
Similar Part No. - AD7767_15 |
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Similar Description - AD7767_15 |
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