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LTC1392I Datasheet(PDF) 5 Page - Linear Technology |
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LTC1392I Datasheet(HTML) 5 Page - Linear Technology |
5 / 12 page 5 LTC1392 TYPICAL PERFORMANCE CHARACTERISTICS INPUT SHIFT REGISTER BANDGAP CONTROL AND TIMING CS 4 LTC1392 • BD SERIAL PORT VREF = 2.42V VREF = 1V VREF = 0.5V ANALOG INPUT MUX 10-BIT SAR 10 BITS CSAMPLE VCC 85 GND TEMPERATURE SENSOR VCC GND DIN 1 VREF +VIN –VIN 6 7 COMP 10-BIT CAPACITIVE DAC + + – + – – DOUT 2 CLK 3 BLOCK DIAGRAM PIN FUNCTIONS DIN (Pin 1): Digital Input. The A/D configuration word is shifted into this input. DOUT (Pin 2): Digital Output. The A/D result is shifted out of this output. CLK (Pin 3): Shift Clock. This clock synchronizes the serial data. CS (Pin 4): Chip Select Input. A logic low on this input enables the LTC1392. GND (Pin 5): Ground Pin. GND should be tied directly to an analog ground plane. +VIN (Pin 6): Positive Analog Differential Input. The pin can be used as a single-ended input by grounding – VIN. –VIN (Pin 7): Negative Analog Differential Input. The input must be free from noise. VCC (Pin8): Positive Supply. This supply must be kept free from noise and ripple by bypassing directly to the ground plane. Supply Current vs Sample Rate TIME (SEC) 0 5 10 15 20 1392 G07 25 70 65 60 55 50 45 40 35 30 25 20 30 VCC = 5V N8 S8 Thermal Response in Stirred Oil Bath SAMPLE FREQUENCY (Hz) 1000 100 10 1 0.1 0.1 10 100 1k 10k 100k 1392 G09 1 VCC = 5V fCLK = 250kHz TA = 25°C CS LOW BETWEEN SAMPLES CS HIGH BETWEEN SAMPLES TIME (SEC) 0 50 100 150 200 1392 G08 250 70 65 60 55 50 45 40 35 30 25 20 300 VCC = 5V N8 S8 Thermal Response in Still Air |
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