AD5590_17 datasheet(4/45 Pages) AD

Numer części	AD5590

Szczegółowy opis	16 Input, 16 Output Analog I/O Port with Integrated Amplifiers

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Producent	AD [Analog Devices]

Strona internetowa	http://www.analog.com

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AD5590

Rev. A | Page 3 of 44

GENERAL DESCRIPTION

The AD5590 is a 16-channel input and 16-channel output

analog I/O port with eight uncommitted amplifiers, operating

from a single 4.5 V to 5.25 V supply. The AD5590 comprises

16 input channels multiplexed into a 1 MSPS, 12-bit successive

approximation ADC with a sequencer to allow a preprogrammed

selection of channels to be converted sequentially. The ADC

contains a low noise, wide bandwidth track-and-hold amplifier

that can handle input frequencies in excess of 1 MHz.

The conversion process and data acquisition are controlled using

ASYNC and the serial clock signal, allowing the device to easily

interface with microprocessors or DSPs. The input signal is

sampled on the falling edge of ASYNC and conversion is also

initiated at this point. There are no pipeline delays associated

with the ADC. By setting the relevant bits in the control register,

the analog input range for the ADC can be selected to be a 0 V

to VREFA input or a 0 V to 2 × VREFA with either straight binary

or twos complement output coding. The conversion time is

determined by the ASCLK frequency because it is also used

as the master clock to control the conversion.

The DAC section of the AD5590 comprises sixteen 12-bit DACs

divided into two groups of eight. Each group has an on-chip

reference. The on-board references are off at power-up, allowing

the use of external references. The internal references are enabled

via a software write.

The AD5590 incorporates a power-on reset circuit that ensures

that the DAC outputs power up to 0 V and remain powered up

at this level until a valid write takes place. The DAC contains a

power-down feature that reduces the current consumption of

the device and provides software-selectable output loads while

in power-down mode for any or all DAC channels. The outputs

of all DACs can be updated simultaneously using the LDAC

function, with the added functionality of user-selectable DAC

channels to simultaneously update. There is also an asynchronous

CLR that updates all DACs to a user-programmable code: zero

scale, midscale, or full scale.

The AD5590 contains eight low noise, single-supply amplifiers.

These amplifiers can be used for signal conditioning for the

ADCs, DACs, or other independent circuitry, if required.

Podobny numer części - AD5590_17

Producent	Numer części	Arkusz danych	Szczegółowy opis
Analog Devices	AD5590BBC	1Mb / 44P	16 Input, 16 Output Analog I/O Port with Integrated Amplifiers REV. 0
Analog Devices	AD5590BBCZ	1Mb / 44P	16 Input, 16 Output Analog I/O Port with Integrated Amplifiers REV. 0

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Podobny opis - AD5590_17

Producent	Numer części	Arkusz danych	Szczegółowy opis
Analog Devices	AD5590	1Mb / 44P	16 Input, 16 Output Analog I/O Port with Integrated Amplifiers REV. 0
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Podobny numer części - AD5590_17

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