BurrBrown Products

from Texas Instruments

1

FEATURES

DESCRIPTION

APPLICATIONS

DS ADC

REFP REFN

CAP

DVDD

DGND

GAIN

AINP

AINN

SCLK

SPEED

DRDY/DOUT

PDWN

AVDD

CAP

Internal

Oscillator

CLKIN

Gain=64or128

PGA

AGND

ADS1230

SBAS366A – OCTOBER 2006 – REVISED JULY 2007

20-Bit Analog-to-Digital Converter

For Bridge Sensors

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• Complete Front-End for Bridge Sensor

The ADS1230 is a precision 20-bit analog-to-digital

converter

(ADC).

With

an

onboard

low-noise

• Onboard PGA with Gain of 64 or 128

programmable

gain

amplifier

(PGA),

onboard

• Onboard Oscillator

oscillator, and precision 20-bit delta-sigma ADC, the

• RMS Noise:

ADS1230 provides a complete front-end solution for

40nV at 10SPS (G = 128)

bridge sensor applications including weigh scales,

88nV at 80SPS (G = 128)

strain gauges, and pressure sensors.

• 18-Bit Noise-Free Resolution

The low-noise PGA has a gain of 64 or 128,

• Selectable 10SPS or 80SPS Data Rates

supporting a full-scale differential input of ±39mV or

±19.5mV, respectively. The delta-sigma ADC has

• Simultaneous 50Hz and 60Hz Rejection at

20-bit effective resolution and is comprised of a

10SPS

3rd-order modulator and 4th-order digital filter. Two

• External Voltage Reference up to 5V for

data rates are supported: 10SPS (with both 50Hz and

Ratiometric Measurements

60Hz rejection) and 80SPS. The ADS1230 can be

clocked by the internal oscillator or an external clock

• Simple, Pin-Driven Control

source. Offset calibration is performed on-demand,

• Two-Wire Serial Digital Interface

and the ADS1230 can be put in a low-power standby

• Tiny 16-pin TSSOP Package

mode or shut off completely in power-down mode.

• Supply Range: 2.7V to 5.3V

All of the features of the ADS1230 are controlled by

• –40°C to +85°C Temperature Range

dedicated pins; there are no digital registers to

program. Data are output over an easily-isolated

serial interface that connects directly to the MSP430

and other microcontrollers.

• Weigh Scales

• Strain Gauges

The ADS1230 is available in a TSSOP-16 package

and is specified from –40

°C to +85°C.

• Pressure Sensors

• Industrial Process Control

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.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2006–2007, 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.