LTC2449IUHF 24-Bit High Speed Analog to Digital Converter with SPI Interface QFN-38

The LTC2449IUHF is an 8-/16-channel high speed 24-bit No Latency ∆Σ™ ADC. It utilizes a proprietary delta-sigma architecture that enables variable speed/resolution. Through a simple 4-wire serial interface, ten speed/resolution combinations from 6.9Hz/280nVRMS to 3.5kHz/25µVRMS (4kHz with external oscillator) can be selected with no latency between conversion results or shift in DC accuracy (offset, full-scale, linearity, drift).

• Up to 8 Differential or 16 Single-Ended Input Channels
• Up to 8kHz Output Rate (External fO)
• Up to 4kHz Multiplexing Rate (External fO)
• Selectable Speed/Resolution
• 2µVRMS Noise at 1.76kHz Output Rate
• 200nVRMS Noise at 13.8Hz Output Rate with Simultaneous 50Hz/60Hz Rejection
• Guaranteed Modulator Stability and Lock-Up Immunity for any Input and Reference Conditions
• 0.0005% INL, No Missing Codes
• Autosleep Enables 20µA Operation at 6.9Hz
• <5µV Offset (4.5V < VCC < 5.5V, -40°C to 85°C)
• Differential Input and Differential Reference with GND to VCC Common Mode Range
• No Latency Mode, Each Conversion is Accurate Even After a New Channel is Selected
• Internal Oscillator--No External Components
• Tiny QFN 5mm × 7mm Package

• High Speed Multiplexing
• Weight Scales
• Auto Ranging 6-Digit DVMs
• Direct Temperature Measurement
• High Speed Data Acquisition