LTC2449

LTC2444/LTC2445/ LTC2448/LTC2449 Features 24-Bit High Speed 8-/16-Channel ∆∑ ADCs with Selectable Speed/Resolution Description nn Up to 8 Differential or 16 Single-Ended Input Channels nn Up to 8kHz Output Rate (External fO) nn Up to 4kHz Multiplexing Rate (External fO) nn Selectable Speed/Resolution nn 2µVRMS Noise at 1.76kHz Output Rate nn 200nVRMS Noise at 13.8Hz Output Rate with Simultaneous 50Hz/60Hz Rejection nn Guaranteed Modulator Stability and Lock-Up Immunity for any Input and Reference Conditions nn 0.0005% INL, No Missing Codes nn Autosleep Enables 20µA Operation at 6.9Hz nn < 5µV Offset (4.5V < VCC < 5.5V, –40°C to 85°C) nn Differential Input and Differential Reference with GND to VCC Common Mode Range nn No Latency Mode, Each Conversion is Accurate Even After a New Channel is Selected nn Internal Oscillator—No External Components nn LTC2445/LTC2449 Include MUXOUT/ADCIN for External Buffering or Gain nn Tiny QFN 5mm × 7mm Package Applications nn High Speed Multiplexing nn Weight Scales nn Auto Ranging 6-Digit DVMs nn Direct Temperature Measurement nn High Speed Data Acquisition The LTC®2444/LTC2445/LTC2448/LTC2449 are 8-/16channel (4-/8-differential) high speed 24-bit No Latency ∆Σ™ ADCs. They use a proprietary delta-sigma architecture enabling variable speed/resolution. Through a simple 4-wire serial interface, ten speed/resolution combinations 6.9Hz/280nVRMS to 3.5kHz/25µVRMS (4kHz with external oscillator) can be selected with no latency between conversion...