The LTC2451CTS8#TRMPBF from Linear Technology is an ultra-tiny, 16bit ∆∑ADC with I2C interface in 8 lead plastic TSOT-23 package. The LTC2451 uses a single supply and accepts a single ended analogue input voltage and communicates through an I2C interface. It includes an integrated oscillator that does not require any external components. It uses a delta-sigma modulator as a converter core and provides single cycle settling time for multiplexed applications. It includes a proprietary input sampling scheme that reduces the average input sampling current several orders of magnitude lower than conventional ∆∑ converters. This is capable of up to 60 conversions per second and due to very large oversampling ratio, has extremely relaxed antialiasing requirements. It is used in system monitoring, environmental monitoring, direct temperature measurements, instrumentation, industrial process control, data acquisition and embedded ADC upgrades.
Single 2.7V to 5.5V, GND to VCC single ended input range
0.02LSB RMS noise, 2LSB INL no missing codes, 1LSB offset error, 4LSB full scale error
Single conversion settling time for multiplexed applications
Single cycle operation with auto shutdown
400µA supply current, 0.2µA sleep current
33.2ms at 30Hz, 16.6ms at 60Hz conversion time, 400KHz clock frequency at full operating temperature
Data hold time of 0.9µs (max), data set up time of 100ns (min) at full operating temperature
1.4µVRMS transition noise, 80db power supply rejection DC at 30Hz mode (TA = 25°C)
