LTC2308IUF#TRPBF

The LTC2308 is a low noise, 500ksps, 8-channel, 12-bit ADC with an SPI/MICROWIRE compatible serial interface. This ADC includes an internal reference and 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 LTC2308 operates from a single 5V supply and draws just 3.5mA at a sample rate of 500ksps. The auto-shutdown feature reduces the supply current to 200μA at a sample rate of 1ksps. The LTC2308 is packaged in a small 24-pin 4mm×4mm QFN. The internal 2.5V reference and 8-channel multiplexer further reduce PCB board space requirements. The low power consumption and small size make the LTC2308 ideal for battery operated and portable applications, while the 4-wire SPI compatible serial interface makes this ADC 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

Key features

• 12-Bit Resolution
• 500ksps Sampling Rate
• Low Noise: SINAD = 73.3dB
• Guaranteed No Missing Codes
• Single 5V Supply
• Auto-Shutdown Scales Supply Current with Sample Rate
• Low Power: 17.5mW at 500ksps, 0.9mW Nap Mode, 35µW Sleep Mode
• Internal Reference
• Internal 8-Channel Multiplexer
• Internal Conversion Clock
• SPI/MICROWIRE Compatible Serial Interface
• Unipolar or Bipolar Input Ranges (Software Selectable)
• Separate Output Supply 0VDD (2.7V to 5.25V)
• 24-Pin 4mm × 4mm QFN Package