AD7706

3 V / 5 V ， 1毫瓦2- / 3通道16位Σ-Δ型ADC 3 V/5 V, 1 mW 2-/3-Channel 16-Bit, Sigma-Delta ADCs

Product Details

The AD7705 and are complete 16-bit, low-cost, Sigma Delta ADCs intended for dc and low-frequency ac measurement applications. Their low power 1 mW max @ 3 V allows them to be used in loop-powered, battery-powered or locally-powered applications. The on-chip Programmable Gain Amplifier with gain settings from I through 128 can accommodate both low-level and high-level analog inputs with no external signal conditioning hardware.

The AD7705 has two differential channels while the AD7706 has one differential and two pseudo-differential channels. Differential reference inputs also allow maximum flexibility in tailoring the device for use in ratiometric applications.

### Features and Benefits

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Three Pseudo Differential Input Channel ADCs

16 Bits No Missing Codes

0.003% Nonlinearity

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Programmable Gain Front End

Gains from 1 to 128

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Ability to Buffer the Analog Input

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2.7 V to 3.3 V or 4.75 V to 5.25 V Operation

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Three-Wire Serial Interface

SPI®, QSPI™, MICROWIRE™ and DSP Compatible

Schmitt Trigger Input on SCLK

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Power Dissipation 1 mW max @ 3 V

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Standby Current 8 µA max

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16-Lead DIP, 16-Lead SOIC and TSSOP Packages