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LTC2305 - 2-Channel, 12-Bit ADCs with I2C Compatible Interface

The LTC2301/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-andhold 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 internal 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.

Features 12-Bit Resolution Low Power: 1.5mW at 1ksps, 35μW Sleep Mode 14ksps Throughput Rate Internal Reference Low Noise: SNR = 73.5dB Guaranteed No Missing Codes Single 5V Supply 2-wire I2C Compatible Serial Interface with 9 Addresses Plus One Global for Synchronization Fast Conversion Time: 1.3μs 1-Channel (LTC2301) and 2-Channel (LTC2305) Versions Unipolar or Bipolar Input Ranges (Software Selectable) Internal Conversion Clock Guaranteed Operation from –40°C to 125°C (MSOP Package) 12-Pin 4mm × 3mm DFN and 12-Pin MSOP Packages Typical Application

Applications Industrial Process Control Motor Control Accelerometer Measurements Battery Operated Instruments Isolated and/or Remote Data Acquisition Power Supply Monitoring Packaging

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