LTC2644CMS-L10#PBF

LTC2644CMS-L10#PBF is a dual-channel, 10bit PWM-to-voltage output DAC. It has rail-to-rail output buffers and is guaranteed monotonic. The LTC2644 measures the period and pulse width of the PWM input signals and updates the voltage output DACs after each corresponding PWM input rising edge. The LTC2644 has a full-scale output of 2.5V using the 10ppm/°C internal reference. It can operate with an external reference, which sets the full-scale output equal to the external reference voltage. Each DAC enters a pin-selectable idle state when the PWM input is held unchanged for more than 60ms. The part operates from a single 2.7V to 5.5V supply and supports PWM input voltages from 1.71V to 5.5V. Applications include digital calibration, trimming and adjustment, level setting, process control and industrial automation, instrumentation, automotive.

• No latency PWM-to-voltage conversion, guaranteed monotonic
• 2.7V to 5.5V supply range, 1.71V to 5.5V input voltage range
• 100KHz to 30Hz PWM input frequency, voltage output updates and settles within 8µs
• 2.5V full scale voltage, internal reference mode, ±1LSB max INL at (VCC = 3V, internal ref)
• Offset error is ±0.5mV typical at (VCC = 3V, internal ref)
• Multiplying bandwidth is 320KHz typical at (external reference, TA = 25°C)
• Output voltage noise density is 180nV/√Hz typical at (f = 1KHz, external reference, TA = 25°C)
• Voltage output slew rate is 1.0V/µs typical at (TA = 25°C)
• VOS temperature coefficient is ±10µV/°C typical at (VCC = 3V, internal ref, TA = 25°C)
• Operating temperature range from 0°C to 70°C, 12-lead plastic MSOP package

附註

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