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Features
- No Latency PWM-to-Voltage Conversion
- Voltage Output Updates and Settles within 8μs
- 100kHz to 30Hz PWM Input Frequency
- ±2.5LSB Max INL; ±1LSB Max DNL (LTC2645-12)
- Guaranteed Monotonic
- Pin-Selectable Internal or External Reference
- 2.7V to 5.5V Supply Range
- 1.71V to 5.5V Input Voltage Range
- Low Power: 4mA at 3V, <1μA Power-Down
- Guaranteed Operation from –40°C to 125°C
- 16-Lead MSOP Package
Typical Application
Description
The LTC®2645 is a family of quad 12-, 10-, and 8-bit PWMto- voltage output DACs with an integrated high accuracy, low drift, 10ppm/°C reference in a 16-lead MSOP package. It has rail-to-rail output buffers and is guaranteed monotonic.
The LTC2645 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 DAC outputs update and settle to 12-bit accuracy within 8μs typically and are capable of sourcing and sinking up to 5mA (3V) or 10mA (5V), eliminating voltage ripple and replacing slow analog filters and buffer amplifiers.
For more detail: LTC2645 – Quad 12-/10-/8-Bit PWM to VOUT DACs with 10ppm/°C Reference
