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ADS1230-ADS1230IPWG4-ADS1230IPWR-ADS1230IPWRG4
20 Bit Delta Sigma ADC for Bridge Sensors
ADCREFP REFNCAP DVDD
SPEED
AVDD
Internal
Oscillator
www.ti.com SBAS366B –OCTOBER 2006–REVISED SEPTEMBER 2012
20-Bit Analog-to-Digital Converter
For Bridge Sensors
Checkfor Samples: ADS1230
1FEATURES DESCRIPTIONThe ADS1230isa precision 20-bit analog-to-digital
Complete Front-End for Bridge Sensor converter (ADC). With an onboard low-noise
• Onboard PGA with Gainof64or 128 programmable gain amplifier (PGA), onboard
Onboard Oscillator oscillator, and precision 20-bit delta-sigma ADC, the
ADS1230 providesa complete front-end solution for
• RMS Noise: bridge sensor applications including weigh scales,
40nVat 10SPS (G= 128) strain gauges, and pressure sensors.
88nVat 80SPS (G= 128)The low-noise PGA hasa gain of 64 or 128,
• 18-Bit Noise-Free Resolution supportinga full-scale differential inputof ±39mVor
• Selectable 10SPSor 80SPS Data Rates ±19.5mV, respectively. The delta-sigma ADC has 20-
• Simultaneous 50Hz and 60Hz Rejectionat bit effective resolution andis comprisedofa 3rd-
10SPS order modulator and 4th-order digital filter. Two data
rates are supported: 10SPS (with both 50Hz and
• External Voltage Reference upto 5V for 60Hz rejection) and 80SPS. The ADS1230 can be
Ratiometric Measurements clocked by the internal oscillatoror an external clock
• Simple, Pin-Driven Control source. Offset calibrationis performed on-demand,
Two-Wire Serial Digital Interface and the ADS1230 can be putina low-power standby
modeor shutoff completelyin power-down mode.
• Tiny 16-pin TSSOP Package Supply Range: 2.7Vto 5.3V Allof the featuresof the ADS1230 are controlledby
dedicated pins; there are no digital registers to
• –40°Cto +85°C Temperature Range program. Data are output over an easily-isolated
serial interface that connects directlyto the MSP430
APPLICATIONS and other microcontrollers.
Weigh Scales The ADS1230is availableina TSSOP-16 package
• Strain Gauges andis specified from –40°Cto +85°C.
Pressure Sensors Industrial Process Control
