BurrBrown Products

from Texas Instruments

1

FEATURES

APPLICATIONS

DESCRIPTION

CDAC

_

+

Output

Latches

and

3-State

Drivers

BYTE

16-/8-Bit

ParallelDA TA

OutputBus

SAR

Conversion

and

ControlLogic

Comparator

Clock

+IN

−IN

REFIN

CONVST

BUSY

CS

RD

4.096-V

Internal

Reference

REFOUT

BUS18/16

ADS8484

SLAS511 – NOVEMBER 2007

18-BIT, 1.25-MSPS, PSEUDO-BIPOLAR, FULLY DIFFERENTIAL INPUT, MICROPOWER

SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH PARALLEL INTERFACE,

REFERENCE

• 48-Pin 7x7 QFN Package

• 1.25-MHz Sample Rate

• ±1.5 LSB Typ, ±2.5 LSB Max INL

• Medical Instruments

• +0.8/-0.6 LSB Typ, +1.5/-1 LSB Max DNL

• Optical Networking

• 18-Bit NMC Ensured Over Temperature

• Transducer Interface

• ±0.5-mV Offset Error

• High Accuracy Data Acquisition Systems

• ±0.05-PPM/°C Offset Error Drift

• Magnetometers

• ±0.1 %FSR Gain Error

• ±0.5-PPM/°C Gain Error Drift

• 98.5dB SNR, –120db THD, 121dB SFDR

The ADS8484 is an 18-bit, 1.25-MSPS A/C converter

with

an

internal

4.096-V

reference

and

a

• Zero Latency

pseudo-bipolar, fully differential input. The device

• Low Power: 235 mW Typ at 1.25 MSPS

includes a 18-bit capacitor-based SAR A/D converter

• Pseudo-Bipolar Fully Differential Input Range:

with inherent sample and hold. The ADS8484 offers a

full 18-bit interface, a 16-bit option where data is read

using two read cycles, or an 8-bit bus option using

• Onboard Reference with 6 PPM/°C Drift

three read cycles.

• Onboard Reference Buffer

The ADS8484 is available in a 48-lead 7x7 QFN

• High-Speed Parallel Interface

package and is characterized over the industrial

• Wide Digital Supply 2.7 V to 5.25 V

–40

°C to 85°C temperature range.

• 8-/16-/18-Bit Bus Transfer

HIGH SPEED SAR CONVERTER FAMILY

TYPE/SPEED

500 kHz

~600 kHz

750 kHz

1 MHz

1.25 MHz

2 MHz

3 MHz

4MHz

ADS8383

ADS8381

ADS8481

18-Bit Pseudo-Diff

ADS8380 (s)

18-Bit Pseudo-Bipolar, Fully Diff

ADS8382 (s)

ADS8482

ADS8484

ADS8327

ADS8370 (s)

ADS8371

ADS8471

ADS8401

ADS8411

16-Bit Pseudo-Diff

ADS8328

ADS8472 (s)

ADS8405

ADS8410 (s)

ADS8472

ADS8402

ADS8412

ADS8422

16-Bit Pseudo-Bipolar, Fully Diff

ADS8406

ADS8413 (s)

14-Bit Pseudo-Diff

ADS7890 (s)

ADS7891

12-Bit Pseudo-Diff

ADS7886

ADS7881

1

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

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

PRODUCTION DATA information is current as of publication date.

Copyright © 2007, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.