LTC2436-1

The LTC2436-1 is a 2-channel differential input micropower 16-bit No Latency ∆Σ^™ analog-to-digital converter with an integrated oscillator. It provides 0.5LSB INL and 800nV RMS noise independent of V_REF. The two differential channels convert alternately with a channel identification included in the conversion result. It uses delta-sigma technology and provides single conversion settling of the digital filter. Through a single pin, the LTC2436-1 can be configured for better than 87dB input differential mode rejection at 50Hz and 60Hz ±2%, or it can be driven by an external oscillator for a user defined rejection frequency. The internal oscillator requires no external frequency setting components.

The converter accepts any external differential reference voltage from 0.1V to V_CC for flexible ratiometric and remote sensing measurement configurations. The full-scale differential input range is from –0.5 • V_REF to 0.5 • V_REF. The reference common mode voltage, V_REFCM, and the input common mode voltage, V_INCM, may be independently set anywhere between GND and V_CC. The DC common mode input rejection is better than 140dB.

The LTC2436-1 communicates through a flexible 3-wire digital interface which is compatible with SPI and MICROWIRE^™ protocols.

Applications

• Direct Sensor Digitizer
• Weight Scales
• Direct Temperature Measurement
• Gas Analyzers
• Strain-Gage Transducers
• Instrumentation
• Data Acquisition
• Industrial Process Control