Hot-selling and scarce AD7711ANZ LC2MOS Signal Conditioning ADC DIP24 spot stock

Product Descriptions

The AD7711 is a complete analog front end for low frequencymeasurement applications . The device accepts low level signalsdirectly from a transducer and outputs a serial digital word . Itemploys a - conversion technique to realize up to 24 bits ofno missing codes performance . The input signal is applied to aproprietary programmable gain front end based around an analog modulator.The modulator output is processed by an on-chipdigital filter . The first notch of this digital filter can be programmed via the on-chip control register, allowing adjustmentof the filter cutoff and settling time .

The part features one differential analog input and one singleended analog input as well as a differential reference input .Normally, one of the input channels will be used as the mainchannel with the second channel used as an auxiliary input toperiodically measure a second voltage . It can be operated from asingle supply (by tying the V_SS pin to AGND), provided that theinput signals on the analog inputs are more positive than –30 mV .By taking the V_SS pin negative, the part can convert signalsdown to –V_REF on its inputs . The part provides two currentsources that can be used to provide excitation in 3-wire and 4-wireRTD configurations . The AD7711 thus performs all signalconditioning and conversion for a single - or dual-channel system .

Product Features

Charge-Balancing ADC

24 Bits, No Missing Codes

0.0015% Nonlinearity

2-Channel Programmable Gain Front End

Gains from 1 to 128

1 Differential Input

1 Single-Ended Input

Low-Pass Filter with Programmable Filter Cutoffs

Ability to Read/Write Calibration Coefficients

RTD Excitation Current Sources

Bidirectional Microcontroller Serial Interface

Internal/External Reference Option

Single - or Dual-Supply Operation

Low Power (25 mW typ) with Power-Down Mode

(7 mW typ)

Product Applications

RTD Transducers

Process Control

Smart Transmitters

Portable Industrial Instruments

Product Specification

Product Photos

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