Texas Instruments ADS5423 Bedienungsanleitung

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SLWS160A − FEBRUARY 2005 − REVIISED JANUARY 2010

14 Bit, 80 MSPS

Analog-to-Digital Converter

ADS5423

FEATURES

D14 Bit Resolution

D80 MSPS Maximum Sample Rate

DSNR = 74 dBc at 80 MSPS and 50 MHz IF

DSFDR = 94 dBc at 80 MSPS and 50 MHz IF

D2.2 V

pp

Differential Input Range

D5 V Supply Operation

D3.3 V CMOS Compatible Outputs

D1.85 W Total Power Dissipation

D2s Complement Output Format

DOn-Chip Input Analog Buffer, Track and Hold,

and Reference Circuit

D52 Pin HTQFP Package With Exposed

Heatsink

DPin Compatible to the AD6644/45

DIndustrial Temperature Range = −405C to 855C

APPLICATIONS

DSingle and Multichannel Digital Receivers

DBase Station Infrastructure

DInstrumentation

DVideo and Imaging

RELATED DEVICES

DClocking: CDC7005

DAmplifiers: OPA695, THS4509

DESCRIPTION

The ADS5423 is a 14 bit 80 MSPS analog-to-digital converter (ADC) that operates from a 5 V supply, while providing 3.3V

CMOS compatible digital outputs. The ADS5423 input buffer isolates the internal switching of the on-chip Track and Hold

(T&H) from disturbing the signal source. An internal reference generator is also provided to further simplify the system

design. The ADS5423 has outstanding low noise and linearity, over input frequency. With only a 2.2 V

PP

input range,

simplifies the design of multicarrier applications, where the carriers are selected on the digital domain.

The ADS5423 is available in a 52 pin HTQFP with heatsink package and is pin compatible to the AD6645. The ADS5423

is built on state of the art Texas Instruments complementary bipolar process (BiCom3) and is specified over full industrial

temperature range (−40°C to 85°C).

FUNCTIONAL BLOCK DIAGRAM

Reference

Timing

CLK+

OVRD[13:0]

CLK−

6

DMIDDRY

VREF

A

IN

A

IN

TH1

55

Σ

DAC2ADC2

ADC3

Σ

DAC1ADC1

A3

A1

TH2

TH3

C1

C2

AV

DD

DRV

DD

GND

Digital Error Correction

A2

+

−

+

−

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Copyright  2005, 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.

PRODUCTION DATA information is current as of publication date. Products

conform to specifications per the terms of Texas Instruments standard warranty.

Production processing does not necessarily include testing of all parameters.

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