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Numéro de référence | ADS1230 | ||
Description | 20-Bit Analog-to-Digital Converter | ||
Fabricant | Burr-Brown | ||
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BurrĆBrown Products
from Texas Instruments
ADS1230
20-Bit Analog-to-Digital Converter
For Bridge Sensors
SBAS366 – OCTOBER 2006
FEATURES
• Complete Front-End for Bridge Sensor
• Onboard PGA with Gain of 64 or 128
• Onboard Oscillator
• RMS Noise:
40nV at 10SPS (G = 128)
88nV at 80SPS (G = 128)
• 18-Bit Noise-Free Resolution
• Selectable 10SPS or 80SPS Data Rates
• Simultaneous 50Hz and 60Hz Rejection at
10SPS
• External Voltage Reference up to 5V for
Ratiometric Measurements
• Simple, Pin-Driven Control
• Two-Wire Serial Digital Interface
• Tiny 16-pin TSSOP Package
• Supply Range: 2.7V to 5.3V
• –40°C to +85°C Temperature Range
APPLICATIONS
• Weigh Scales
• Strain Gauges
• Pressure Sensors
• Industrial Process Control
DESCRIPTION
The ADS1230 is a precision 20-bit analog-to-digital
converter (ADC). With an onboard low-noise
programmable gain amplifier (PGA), onboard
oscillator, and precision 20-bit delta-sigma ADC, the
ADS1230 provides a complete front-end solution for
bridge sensor applications including weigh scales,
strain gauges, and pressure sensors.
The low-noise PGA has a gain of 64 or 128,
supporting a full-scale differential input of ±39mV or
±19.5mV, respectively. The delta-sigma ADC has
20-bit effective resolution and is comprised of a
3rd-order modulator and 4th-order digital filter. Two
data rates are supported: 10SPS (with both 50Hz
and 60Hz rejection) and 80SPS. The ADS1230 can
be clocked by the internal oscillator or an external
clock source. Offset calibration is performed
on-demand, and the ADS1230 can be put in a
low-power standby mode or shut off completely in
power-down mode.
All of the features of the ADS1230 are controlled by
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.
The ADS1230 is available in a TSSOP-16 package
and is specified from –40°C to +85°C.
AVDD
CAP
AINP
AINN
Gain = 64 or 128
PGA
REFP REFN DVDD
DS ADC
PDWN
DRDY/DOUT
SCLK
Internal
Oscillator
SPEED
AGND GAIN
CAP
CLKIN
DGND
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.
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2006, Texas Instruments Incorporated
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Pages | Pages 25 | ||
Télécharger | [ ADS1230 ] |
No | Description détaillée | Fabricant |
ADS1230 | 20-Bit Analog-to-Digital Converter | Burr-Brown |
ADS1230 | 20-Bit Analog-to-Digital Converter for Bridge Sensors (Rev. B) | Texas Instruments |
ADS1231 | 24-Bit ADC for Bridge Sensors (Rev. D) | Texas Instruments |
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