MAX11209

The MAX11209/MAX11211 operate over the -40°C to +85°C temperature range, and are available in a 16-pin QSOP package. The MAX11209/MAX11211 are ultra-low-power (< 300FA active current), high-resolution, serial-output ADCs. These devices provide the highest resolution per unit power in the industry, and are optimized for applications that require very high dynamic range with low power, such as sensors on a 4mA to 20mA industrial control loop. The devices provide a high-accuracy internal oscillator that requires no external components. Optional input buffers provide isolation of the signal inputs from the switched capacitor sampling network allowing these converters to be used with high-impedance sources without compromising available dynamic range or linearity. When used with the specified data rates, the internal digital filter provides more than 100dB rejection of 50Hz or 60Hz line noise. The devices are configurable using the SPIinterface and include four GPIOs that can be used for external mux control. The MAX11209 includes digital programmable gain of 1 to 128.

The features of MAX11209 can be summarized as (1)18-bit noise-free resolution; (2)570nVRM noise at 10sps, ±3.6VFinput; (3)3ppm INL (typ), 15ppm (max); (4)no missing codes; (5)ultra-low power dissipation operating-mode current drain < 300A (max)/ sleep-mode current drain < 0.4A; (6)programmable gain (1 to 128)(MAX11209); (7)four SPI-controlled GPIOs for external mux control; (8)2.7V to 3.6V analog supply voltage range; (9)1.7V to 3.6V digital and I/O supply voltage range; (10)fully differential signal and reference inputs; (11)high-impedance inputs optional input buffers on both signal and reference inputs; (12)> 100dB (min)50Hz/60Hz rejection; (13)SPI-, QSPITM-, MICROWIRETM-compatible serial interface; (14)on-demand offset and gain self-calibration and system calibration; (15)user-programmable offset and gain registers; (16)-40°C to +85°C operating temperature range; (17)±2kV ESD protection; (18)lead(Pb)-free and RoHS-compliant QSOP package.

The absolute maximum ratings of MAX11209 are (1)any pin to GND: -0.3V to +3.9V; (2)AVDD to GND: -0.3V to +3.9V; (3)DVDD to GND: -0.3V to +3.9V; (4)analog inputs (AINP, AINN, REFP, REFN)to GND: -0.3V to (VAVDD + 0.3V); (5)digital inputs and digital outputs to GND: -0.3V to (VDVDD + 0.3V); (6)ESDHB (AVDD, AINP, AINN, REFP, REFN, DVDD, CLK, CS, SCLK, DIN, RDY/DOUT, GND, GPIO_): Q2kV; (7)continuous power dissipation (TA = +70°C)16-pin QSOP (derate 8.3mW/°C above +70°C): 667mW; (8)operating temperature range: -40°C to +85°C; (9)junction temperature: +150°C; (10)storage temperature range: -55°C to +150°C; (11)lead temperature (soldering, 10s): +300°C; (12)soldering temperature (reflow): +260°C.