The MAX11270EUG+ is a 24bit, delta sigma analog to digital converter (ADC) with integrated PGA in 24 pin TSSOP package. It achieves excellent 130dB SNR while dissipating an ultra low 10mW. Sample rates up to 64Ksps allow both precision DC and AC measurements. Integral nonlinearity is 1ppm (typical) and 4ppm (maximum). The MAX11270 communicates via an SPI compatible serial interface. It offers 6.5nV/√Hz noise programmable gain amplifier with gain settings between 1x to 128x. Optional buffers are also included to provide isolation of signal inputs from switched capacitor sampling network. This allows MAX11270 to be used with high impedance sources without compromising available dynamic range. The MAX11270 operates from single 2.7V to 3.6V analogue supply or split ±1.8V analogue supplies allowing analogue input to be sampled below ground. The digital supply range is 2V to 3.6V allowing communication with 2.5V, 3V or 3.3V logic. It is used in scientific instrumentation and ATE equipments.
DC common mode rejection of 135dB (bypass and buffer mode)
Operating temperature range from -40°C to 85°C
20.4bit noise free resolution at 1.9sps and 17.4bit noise free resolution at 1000sps
High resolution for instrumentation applications that require wide dynamic range
Longer battery life, 2.4mA operating mode current and 4.4mA PGA low noise mode current
Sleep current of 1µA
Offset error of 10nV and gain error of 2ppm
Single or split analogue supplies provide input voltage range flexibility
Flexible high performance filter architecture simplifies design, programmable SINC filter
Enables system integration, enables integrated part and system calibration for gain and offset
