Low Noise, 500ksps, 2-Channel, 12-Bit ADC

The LTC2302/LTC2306 are low noise, 500ksps, 1-/2-channel, 12-bit ADCs with an SPI/MICROWIRE compatible serial interface. These ADCs include a fully differential sample-and-hold circuit to reduce common mode noise. The internal conversion clock allows the external serial output data clock (SCK) to operate at any frequency up to 40MHz.

The LTC2302/LTC2306 operate from a single 5V supply and draw just 2.8mA at a sample rate of 500ksps. The auto-shutdown feature reduces the supply current to 14μA at a sample rate of 1ksps.

The LTC2302/LTC2306 are packaged in a tiny 10-pin 3mm × 3mm DFN. The low power consumption and small size make the LTC2302/LTC2306 ideal for battery-operated and portable applications, while the 4-wire SPI compatible serial interface makes these ADCs a good match for isolated or remote data acquisition systems.

Applications

* High Speed Data Acquisition

* Industrial Process Control

* Motor Control

* Accelerometer Measurements

* Battery-Operated Instruments

* Isolated and/or Remote Data Acquisition

* 12-Bit Resolution

* 500ksps Sampling Rate

* Low Noise: SINAD = 72.8dB

* Guaranteed No Missing Codes

* Single 5V Supply

* Auto-Shutdown Scales Supply Current with Sample Rate

* Low Power:

* 14mW at 500ksps

* 70μW at 1ksps

* 35μW Sleep Mode

* 1-Channel (LTC2302) and 2-Channel (LTC2306) Versions

* Unipolar or Bipolar Input Ranges (Software Selectable)

* Internal Conversion Clock

* SPI/MICROWIRE™ Compatible Serial Interface

* Separate Output Supply OVDD (2.7V to 5.25V)

* Software Compatible with the LTC2308

* 10-Pin (3mm × 3mm) DFN Package