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LTC1655CN8 Datasheet(PDF) 5 Page - Linear Technology |
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LTC1655CN8 Datasheet(HTML) 5 Page - Linear Technology |
5 / 12 page 5 LTC1655 PIN FUNCTIONS CLK (Pin 1): The TTL Level Input for the Serial Interface Clock. DIN (Pin 2): The TTL Level Input for the Serial Interface Data. Data on the DIN pin is latched into the shift register on the rising edge of the serial clock and is loaded MSB first. The LTC1655 requires a 16-bit word. CS/LD (Pin 3): The TTL Level Input for the Serial Inter- face Enable and Load Control. When CS/LD is low the CLK signal is enabled, so the data can be clocked in. When CS/LD is pulled high, data is loaded from the shift register into the DAC register, updating the DAC output. DOUT (Pin 4): Output of the Shift Register. Becomes valid on the rising edge of the serial clock and swings from GND to VCC. GND (Pin 5): Ground. REF (Pin 6): Reference. Output of the internal reference is 2.048V. There is a gain of two from this pin to the output. The reference can be overdriven from 2.2V to VCC/2. When tied to VCC/2, the output will swing from GND to VCC. The output can only swing to within its offset specification of VCC (see Applications Information). VOUT (Pin 7): Deglitched Rail-to-Rail Voltage Output. VOUT clears to 0V on power-up. VCC (Pin 8): Positive Supply Input. 4.5V ≤ VCC ≤ 5.5V. Requires a bypass capacitor to ground. TI I G DIAGRA D15 MSB D14 D13 D1 t1 t6 D0 LSB t2 t4 t3 t 8 CLK DIN DOUT CS/LD t5 1655 TD D15 PREVIOUS WORD D14 PREVIOUS WORD D0 PREVIOUS WORD D15 CURRENT WORD D13 PREVIOUS WORD t9 t7 12 3 15 16 |
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