MAX11270 Datasheet | Maxim Integrated

EVALUATION KIT AVAILABLE 24-Bit, 10m W, 130d B SNR, 64ksps Delta-Sigma ADC with Integrated PGA General Description The MAX11270 is a 24-bit delta-sigma ADC that achieves excellent 130d B SNR while dissipating an ultra-low 10m W. Sample rates up to 64ksps allow both precision DC and AC measurements. Integral nonlinearity is guaranteed to 4ppm maximum. The THD is -122d B. The MAX11270 municates via an SPI-patible serial interface and is available in a small 24-pin TSSOP package. The MAX11270 offers a 6.5n V/√Hz noise programmable gain amplifier with gain settings between 1x to 128x. Optional buffers are also included to provide isolation of the signal inputs from the switched capacitor sampling network. This allows the MAX11270 to be used with high-impedance sources without promising available dynamic range. The MAX11270 operates from a single 2.7V to 3.6V analog supply, or split ±1.8V analog supplies, allowing the analog input to be sampled below ground. The digital supply range is 2.0V to 3.6V, allowing munication with 2.5V, 3V, or 3.3V logic. Applications - - Scientific Instrumentation - - High-Precision Portable Sensors - - Medical Equipment - - ATE Ordering Information and Functional Diagram appear at end of data sheet. Typical Application Circuit Features and Benefits - - High Resolution for Instrumentation Applications that Require a Wide Dynamic Range ∙130d B SNR at 1.9sps ∙112d B SNR at 1000sps ∙20.4-Bit Noise-Free Resolution at 1.9sps ∙17.4-Bit Noise-Free Resolution at 1000sps - - Longer Battery Life for Portable Applications ∙ 2.4m A Operating Mode Current ∙ 4.4m A PGA Low-Noise Mode Current ∙ 1μA Sleep Current - - High Accuracy for DC Measurements ∙ 1ppm INL (typ), 4ppm (max) - - Single or Split Analog Supplies Provide Input Voltage Range Flexibility ∙ 2.7V to 3.6V (Single Supply) or ±1.8V (Split Supplies) - - Flexible High-Performance Filter Architecture Simplifies Design ∙ Programmable SINC Filter - - Enables System Integration ∙...