LTC1408CUH-12#PBF

LTC1408CUH-12#PBF is a 12bit, 600ksps ADC with six simultaneously sampled differential inputs. A SLEEP shutdown feature further reduces power consumption to 6µW. The combination of low power and tiny package makes the device suitable for portable applications. It contains six separate differential inputs that are sampled simultaneously on the rising edge of the CONV signal. These six sampled inputs are then converted at a rate of 100ksps per channel. The 83dB common mode rejection allows users to eliminate ground loops and common mode noise by measuring signals differentially from the source. This device converts 0V to 2.5V unipolar inputs differentially, or ±1.25V bipolar inputs also differentially, depending on the state of the BIP pin. Any analogue input may swing rail-to-rail as long as the differential input range is maintained. Applications include multiphase power measurement, multiphase motor control, data acquisition systems, and uninterruptable power supplies.

• 2.5V internal bandgap reference, can be overdriven with external reference
• 3-wire SPI-compatible serial interface, internal conversion triggered by CONV
• Integral linearity error is ±0.25LSB typical at (TA = 25°C, VDD = VCC = 3V)
• Signal-to-noise plus distortion ratio is 72dB typical at (100KHz input signal, TA = 25°C)
• Total harmonic distortion is -90dB typical at (100KHz first 5 harmonics, TA = 25°C, VDD = VCC = 3V)
• Analog input common mode rejection ratio is -83dB typical at (fIN = 100KHz, VIN = 0V to 3V)
• Supply voltage is 3V typ at (TA = 25°C), 5mA typ supply current at (active mode,fSAMPLE = 600ksps)
• Power dissipation is 15mW typical at (active mode with SCK, fSAMPLE = 600ksps)
• Maximum sampling rate per channel (conversion rate) is 100KHz minimum at (TA = 25°C, VDD = 3V)
• Operating temperature range from 0°C to 70°C, 32-pin plastic QFN package

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