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ML2330IS-5 데이터시트(PDF) 6 Page - Micro Linear Corporation |
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ML2330IS-5 데이터시트(HTML) 6 Page - Micro Linear Corporation |
6 / 7 page ML2330 6 VOLTAGE REFERENCE A bandgap voltage reference is incorporated on the ML2330. It is trimmed for zero temperature coefficient at 25°C to minimize output voltage drift over the specified operating temperature range. OUTPUT BUFFER AND GAIN SETTING The output buffer converts the DAC output current to a voltage output using a resistive network. The outputs can swing from GND +0.02V to either 2.02V (3V) or 4.02V (5V). The DAC transfer function is: V K DATA OUT = × + 256 002 . where K = 2 if VCC = 3V and K = 4 if VCC = 5V In the 3V operation, the amplifier outputs will settle to 1/2LSB in 10µs when loads are greater than 1ký (2ký for 5V operation) and capacitive loads smaller than 100pF. GAIN ERROR The graph below shows how gain error varies with temperature when VCC = 3.3V. POWER DOWN MODE There are three power-down modes in the ML2330. By clearing the control bits P1-P0 (Table 3.2), the entire chip will be powered down with a supply current less than 5µA. Individual DACs can also be powered down to save power (1.75mA per DAC). –40 –20 0 20 40 60 80 100 TEMPERATURE ( C) 0.4 0.3 0.2 0.1 –0.0 –0.1 –0.2 –0.3 –0.4 –0.5 –0.6 –0.7 –0.8 –0.9 –1.0 Gain Error vs Temperature |
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