Texas Instruments ADS1605 Handleiding

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FEATURES

DData Rate: 5MSPS (10MSPS in 2X Mode)

DSignal-to-Noise Ratio: 88dB

DTotal Harmonic Distortion: −99dB

DSpurious-Free Dynamic Range: 101dB

DLinear Phase with 2.45MHz Bandwidth

DPassband Ripple: ±0.0025dB

DSelectable On-Chip Reference

DDirectly Connects to TMS320C6000 DSPs

DEasily Upgradable to 18 Bits with the

ADS1625 and ADS1626

DAdjustable Power Dissipation: 315 to 570mW

DPower Down Mode

DSupplies:Analog +5V

Digital +3V

Digital I/O +2.7V to +5.25V

APPLICATIONS

DScientific Instruments

DAutomated Test Equipment

DData Acquisition

DMedical Imaging

DVibration Analysis

DESCRIPTION

The ADS1605 and ADS1606 are high-speed, high-pre-

cision, delta-sigma analog-to-digital converters (ADCs)

with 16-bit resolution. The data rate is 5 mega-samples

per second (MSPS), the bandwidth (−3dB) is 2.45MHz,

and passband ripple is less than ±0.0025dB (to

2.2MHz). Both devices offer the same outstanding per-

formance at these speeds with a signal-to-noise ratio up

to 88dB, total harmonic distortion down to −99dB, and

a spurious-free dynamic range up to 101dB. For even

higher-speed operation, the data rate can be doubled to

10MSPS in 2X mode. The ADS1606 includes an adjust-

able first-in first-out buffer (FIFO) for the output data.

The input signal is measured against a voltage refer-

ence that can be generated on-chip or supplied exter-

nally. The digital output data are provided over a simple

parallel interface that easily connects to digital signal

processors (DSPs). An out-of-range monitor reports

when the input range has been exceeded. The

ADS1605/6 operate from a +5V analog supply (AVDD)

and +3V digital supply (DVDD). The digital I/O supply

(IOVDD) operates from +2.7 to +5.25V, enabling the

digital interface to support a range of logic families. The

analog power dissipation is set by an external resistor

and can be reduced when operating at slower speeds.

A power down mode, activated by a digital I/O pin, shuts

down all circuitry. The ADS1605/6 are offered in a

TQFP-64 package using TI PowerPAD technology.

The ADS1605 and ADS1606, along with their 18-bit

counterparts, the ADS1625 and ADS1626, are well

suited for the demanding measurement requirements

of scientific instrumentation, automated test equip-

ment, data acquisition, and medical imaging.

REFEN

FIFO_LEV[2:0]

DOUT[15:0]

OTR

DRDY

RD

2XMODE

CS

CLK

PD

RESET

ADS1606 Only

FIFO

I/O

Interface

Digital

Filter

DS

Modulator

Reference and Bias Circuits

DGNDAGND

AVDDDVDDIOVDDVCAPRBIASVMIDVREFNVREFP

AINP

AINN

ADS1605

ADS1606

ADS1605

ADS1606

SBAS274H − MARCH 2003 − REVISED MAY 2007

16-Bit, 5MSPS

Analog-to-Digital Converter

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          

 !     !   

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Copyright  2003−2007, Texas Instruments Incorporated

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of TexasInstruments

semiconductor products and disclaimers thereto appears at the end of this data sheet.

PowerPAD is a trademark of Texas Instruments. All other trademarks are the property of their respective owners.

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