ADS1203

ADS1203 SBAS318 − JUNE 2004 Motor Control Current Measurement 1ĆBit, 10MHz, 2ndĆOrder, DeltaĆSigma Modulator FEATURES D 16-Bit Resolution D 14-Bit Linearity D ±250mV Input Range with Single +5V Supply D 1% Internal Reference Voltage D 1% Gain Error D Flexible Serial Interface with Four Different Modes DESCRIPTION The ADS1203 is a delta-sigma (∆Σ) modulator with a 95dB dynamic range, operating from a single +5V supply. The differential inputs are ideal for direct connection to transducers or low-level signals. With the appropriate digital filter and modulator rate, the device can be used to achieve 16-bit analog-to-digital (A/D) conversion with no missing codes. An effective resolution of 14 bits or SNR of 85dB (typical) can be maintained with a digital filter bandwidth of 40kHz at a modulator rate of 10MHz. The ADS1203 is designed for use in medium- to high-resolution measurement applications including current measurements, smart transmitters, industrial process control, weigh scales, chromatography, and portable instrumentation. It is available in an 8-lead TSSOP package. A 16-pin QFN (3x3) package will be available soon. D Implemented Twinned Binary Coding as D Split-Phase or Manchester Coding for One-Line Interfacing Operating Temperature Range: −40°C to +85°C APPLICATIONS D Motor Control D Current Measurement D Industrial Process Control D Instrumentation D Smart Transmitters D Portable Instruments D Weight Scales D Pressure Transducers VIN+ VIN− 2nd−Order ∆Σ Modula...