ADS1230

用于桥传感器的 20 位模数转换器

The 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.

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Complete Front-End for Bridge Sensor

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Onboard PGA with Gain of 64 or 128

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Onboard Oscillator

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RMS Noise:

40nV at 10SPS G = 128

88nV at 80SPS G = 128

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18-Bit Noise-Free Resolution

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Selectable 10SPS or 80SPS Data Rates

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Simultaneous 50Hz and 60Hz Rejection at 10SPS

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External Voltage Reference up to 5V for Ratiometric Measurements

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Simple, Pin-Driven Control

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Two-Wire Serial Digital Interface

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Tiny 16-pin TSSOP Package

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Supply Range: 2.7V to 5.3V

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-40°C to +85°C Temperature Range

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APPLICA ONS

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Weigh Scales

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Strain Gauges

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Pressure Sensors

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Industrial Process Control

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