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LTC1448CS8 Datasheet(PDF) 8 Page - Linear Technology |
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LTC1448CS8 Datasheet(HTML) 8 Page - Linear Technology |
8 / 12 page 8 LTC1448 TYPICAL APPLICATIONS This circuit shows how to use one LTC1448 to make an autoranging ADC. The microprocessor sets the reference span and the Common pin for the analog input by loading the appropriate digital code into the LTC1448. VOUT A controls the Common pin for the analog inputs to the LTC1296 and VOUTB controls the reference span by setting the REF + pin on the LTC1296. The LTC1296 has a Shut- down pin that goes low in shutdown mode. This will turn off the PNP transistor supplying power to the LTC1448. The resistor and capacitor on the LTC1448 outputs act as a lowpass filter for noise. LTC1296 VCC 50k 74HC04 5V 5V CS 22 µF µP CLK 8 ANALOG INPUT CHANNELS DOUT DIN CH0 COM SSO REF – CH7 REF+ 50k 0.1 µF 100 Ω 100 Ω LTC1448 CS/LD CLK REF DIN VOUT B GND VCC 1448 TA04 VOUT A 0.1 µF 0.1 µF An Autoranging 8-Channel ADC with Shutdown |
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