ADS1234

www.DataSheet4U.com BurrĆBrown Products from Texas Instruments ADS1232 ADS1234 SBAS350 – JUNE 2005 Ultra Low-Noise, 24-Bit Analog-to-Digital Converter 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 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 acc...