AD7705BN Datasheet

Analog to Digital Converters - ADC


The AD7705BN /AD7706 are complete analog front ends for low frequency measurement applications. These two-/three-channel devices can accept low level input signals directly from a transducer and produce a serial digital output. They employ a sigmadelta conversion technique to realize up to 16 bits of no missing codes performance. The selected input signal is applied to a proprietary programmable gain front end based around an analog modulator. The modulator output is processed by an onchip digital filter. The first notch of this digital filter can be programmed via an on-chip control register allowing adjustment of the filter cutoff and output update rate. AD7705BN Features • AD7705: Two Fully Differential Input Channel ADCs• AD7706: Three Pseudo Differential Input Channel ADCs 16 Bits No Missing Codes 0.003% Nonlinearity• Programmable Gain Front End Gains from 1 to 128• Three-Wire Serial Interface SPI™, QSPI™, MICROWIRE™ and DSP Compatible Schmitt Trigger Input on SCLK• Ability to Buffer the Analog Input• 2.7 V to 3.3 V or 4.75 V to 5.25 V Operation• Power Dissipation 1 mW max @ 3ÊV• Standby Current 8 mA max• 16-Lead DIP, 16-Lead SOIC and TSSOP Packages


[{"Name":"RoHS","Value":"No"},{"Name":"Number of Channels ","Value":"2"},{"Name":"Architecture","Value":"Sigma-Delta "},{"Name":"Conversion Rate","Value":"500 SPs"},{"Name":"Resolution","Value":"16 bit "},{"Name":"Input Type ","Value":"Differential"},{"Name":"SNR","Value":"116 dB"},{"Name":"Interface Type ","Value":"Serial (3-Wire, SPI, QSPI, Microwire) "},{"Name":"Operating Supply Voltage","Value":"5 V "},{"Name":"Package / Case ","Value":"PDIP-16 "}]

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