ADS1230 Datasheet | Texas Instruments

.ti. SBAS366B - OCTOBER 2006 - REVISED SEPTEMBER 2012 20-Bit Analog-to-Digital Converter For Bridge Sensors Check for Samples: ADS1230 Features - 2 plete Front-End for Bridge Sensor - Onboard PGA with Gain of 64 or 128 - Onboard Oscillator - RMS Noise: 40n V at 10SPS (G = 128) 88n V 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 plete 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 ±39m V or ±19.5m V, respectively. The delta-sigma ADC has 20bit effective resolution and is prised of a 3rdorder 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 pletely 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....