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LTC2644 Datasheet(PDF) 10 Page - Linear Technology |
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LTC2644 Datasheet(HTML) 10 Page - Linear Technology |
10 / 20 page LTC2644 10 2644f For more information www.linear.com/LTC2644 TYPICAL PERFORMANCE CHARACTERISTICS Multiplying Bandwidth Gain Error vs Reference Input Gain Error vs Temperature Headroom at Rails vs Output Current Noise Voltage vs Frequency DAC-to-DAC Crosstalk (Dynamic) Supply Current vs Input Period (tPER) Supply Current vs Duty Cycle (tPW/tPER) Mid-Scale Glitch Impulse PERIOD (µs) 2 3 5 7 8 10 100 10,000 100,000 2644 G23 1 1 1000 6 4 0 LTC2644-12 DUTY CYCLE = 50% 2-CHANNELS ACTIVE VCC = 5V VCC = 3V 50 75 100 25 0 DUTY CYCLE (%) 2645 G24 3.00 2.75 2.50 2.25 2.00 LTC2644-12 VCC = 3V, IDLSEL = 0V 2-CHANNELS ACTIVE tPER = 20ms tPER = 200µs 1k 10k 100k 1M FREQUENCY (Hz) 2644 G26 2 0 –2 –4 –6 –8 –10 –12 –14 –16 –18 VCC = 5V VREF(DC) = 2V VREF(AC) = 0.2VP-P CODE = FULL SCALE 1 2.5 2 1.5 4 4.5 5 3 3.5 5.5 REFERENCE VOLTAGE (V) 2644 G27 1.0 0.8 0.6 0.4 0.2 0 –0.2 –0.4 –0.6 –0.8 –1.0 VCC = 5.5V GAIN ERROR OF 2 CHANNELS –50 0 –25 75 100 25 50 125 TEMPERATURE (°C) 2644 G28 1.0 0.5 0 –0.5 –1.0 0 1 2 3 4 5 6 9 7 8 10 IOUT (mA) 2644 G29 5.0 4.5 4.0 3.5 3.0 2.0 1.5 1.0 2.5 0.5 0 3V SOURCING 5V SINKING 3V SINKING 5V SOURCING 100 1k 10k 100k 1M FREQUENCY (Hz) 2644 G30 500 400 300 200 100 0 VCC = 5V CODE = MID-SCALE INTERNAL REF 2µs/DIV 2644 G31 INA 5V/DIV DACA SWITCH 0-FS 2V/DIV VOUTB 1mV/DIV LTC2644-12, VCC = 5V VREF = 2.5V 0.9nV-s TYP (TA = 25°C, unless otherwise noted.) (Internal Reference, VFS = 2.5V) 2µs/DIV 2644 G25 VOUTX 5mV/DIV INX 5V/DIV LTC2644-12 VCC = 5V 2.1nV-s TYPICAL |
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