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LTC2305CMSXTRPBF Datasheet(PDF) 1 Page - Linear Technology |
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LTC2305CMSXTRPBF Datasheet(HTML) 1 Page - Linear Technology |
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1 / 24 page  LTC2301/LTC2305 1 23015f BLOCK DIAGRAM FEATURES APPLICATIONS DESCRIPTION 1-/2-Channel, 12-Bit ADCs with I2C Compatible Interface The LTC®2301/LTC2305 are low noise, low power, 1-/2- channel, 12-bit successive approximation ADCs with an I2C compatible serial interface. These ADCs include an internal reference and a fully differential sample-and-hold circuit to reduce common-mode noise. The LTC2301/LTC2305 operate from an internal clock to achieve a fast 1.3μs conversion time. The LTC2301/LTC2305 operate from a single 5V supply and draw just 300μA at a throughput rate of 1ksps. The ADC enters nap mode when not converting, reducing the power dissipation. The LTC2301/LTC2305 are available in small 12-pin 4mm × 3mm DFN and 12-pin MSOP packages. The in- ternal 2.5V reference further reduces PCB board space requirements. The low power consumption and small size make the LTC2301/LTC2305 ideal for battery operated and portable applications, while the 2-wire I2C compatible serial interface makes these ADCs a good match for space-constrained systems. 12-Bit I2C ADC Famly Input Channels 1 2 8 Part Number LTC2301 LTC2305 LTC2309 Integral Nonlinearity vs Output Code (LTC2305) n 12-Bit Resolution n Low Power: 1.5mW at 1ksps, 35μW Sleep Mode n 14ksps Throughput Rate n Internal Reference n Low Noise: SNR = 73.5dB n Guaranteed No Missing Codes n Single 5V Supply n 2-wire I2C Compatible Serial Interface with 9 Addresses Plus One Global for Synchronization n Fast Conversion Time: 1.3μs n 1-Channel (LTC2301) and 2-Channel (LTC2305) Versions n Unipolar or Bipolar Input Ranges (Software Selectable) n Internal Conversion Clock n Guaranteed Operation from –40°C to 125°C (MSOP Package) n 12-Pin 4mm × 3mm DFN and 12-Pin MSOP Packages n Industrial Process Control n Motor Control n Accelerometer Measurements n Battery Operated Instruments n Isolated and/or Remote Data Acquisition n Power Supply Monitoring L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. 23015 TA01a + – 12-BIT SAR ADC ANALOG INPUT MUX ANALOG INPUT 0V TO 4.096V UNIPOLAR ±2.048V BIPOLAR I2C PORT INTERNAL 2.5V REF 0.1μF 10μF 2.2μF VREF REFCOMP SCL SDA AD1 AD0 CH0(IN+) CH1(IN+) PIN NAMES IN PARENTHESES REFER TO LTC2301 10μF 0.1μF VDD LTC2301 LTC2305 GND 5V OUTPUT CODE 0 1.00 0.75 0.25 –0.25 –0.75 0.50 0.00 –0.50 –1.00 2048 1024 3072 23015 TA01b 4096 |
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