Features

• 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 OV_DD (2.7V to 5.25V)
• Software Compatible with the LTC2308
• 10-Pin (3mm x 3mm) DFN Package

Typical Application

Description

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 x 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.