●DESCRIPTION
●The ADS1232 and ADS1234 are precision analog-to-digital (A/D) converters featuring true 23.5
●effective-bit performance and exceptional ease of use. Selectable gains of 1, 2, 64, or 128 allow
●full-scale differential input ranges of ±2.5V to ±19.5mV with a +5V reference. While the ADS1232
●offers a two-channel differential input and a built-in temperature sensor, the ADS1234 features a
●four-channel differential input multiplexer. A very low-noise Gain-Amp features low differential input current to minimize errors when using high-impedance transducers. An on-board oscillator
●is provided for excellent 50Hz and 60Hz rejection without an external clock source. The devices also feature a low current driver to accommodate an external crystal; they also accept external clock sources for all applications.
●FEATURES
●• Up to 23.5 Effective Bits
●• RMS Noise:
●– 17nV at 10Hz
●– 44nV at 80Hz
●• On-Board Low Noise Gain-Amp
●• 19.2-Bit Noise-Free Resolution at Gain = 64
●• Simultaneous 50Hz and 60Hz Rejection:
●– Internal Clock: 110 dB
●– External Clock: 130 dB
●• ±1% Low-Drift On-Board Oscillator
●• Selectable Gains of 1, 2, 64, and 128
●• Selectable 10/80SPS Conversion Rates
●• 2-Channel Differential Input with Built-In Temp sensor (ADS1232)
●• 4-Channel Differential Input (ADS1234)
●• External Reference up to AVDD
●• Simple Serial Digital Interface
●• Supply Range: 2.7V to 5.3V
●• –40°C to +105°C Temperature Range
●APPLICATIONS
●• Weigh Scales
●• Strain Gauges
●• Bridge Sensors
●• Industrial Process Control
