2-Channel, 12-Bit ADCs with IC 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.

Applications

* Industrial Process Control

* Motor Control

* Accelerometer Measurements

* Battery Operated Instruments

* Isolated and/or Remote Data Acquisition

* Power Supply Monitoring

* 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