ADS1230

20-Bit Analog-to-Digital Converter For Bridge Sensors

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.

ABSOLUTE MAXIMUM RATINGS

over operating free-air temperature range (unless otherwise noted) ⁽¹⁾

(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

PIN CONFIGURATION

Stock Offer (Hot Sell)

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