LTC2414

` 8-/16-Channel Single-Ended or 4-/8-Channel Differential Inputs (LTC2414/LTC2418)
` Low Supply Current (200A, 4A in Autosleep)
` Differential Input and Differential Reference with GND to V<sub>CC</sub> Common Mode Range
` 2ppm INL, No Missing Codes
` 2.5ppm Full-Scale Error and 0.5ppm Offset
` 0.2ppm Noise
` No Latency: Digital Filter Settles in a Single Cycle.Each Conversion Is Accurate, Even After a New Channel is Selected
` Single Supply 2.7V to 5.5V Operation
` Internal Oscillator-No External Components Required
` 110dB Min, 50Hz/60Hz Notch Filter

The LTC^®2414/LTC2418 are 8-/16-channel (4-/8-differential) micropower 24-bit analog-to-digital converters.They operate from 2.7V to 5.5V and include an integrated oscillator, 2ppm INL and 0.2ppm RMS noise.They use delta-sigma technology and provide single cycle settling time for multiplexed applications. Through a single pin, the LTC2414/LTC2418 can be configured for better than 110dB differential mode rejection at 50Hz or 60Hz ±2%, or they can be driven by an external oscillator for a user-defined rejection frequency. The internal oscillator requires no external frequency setting components.

The LTC2414/LTC2418 accept any external differential reference voltage from 0.1V to V_CC for flexible ratiometric and remote sensing measurement applications. They can be configured to take 4/8 differential channels or 8/16 single-ended channels. The full-scale bipolar input range is from 0.5V_REF to 0.5V_REF. The reference common mode voltage, V_REFCM, and the input common mode voltage,V_INCM, may be independently set within GND to V_CC.The DC common mode input rejection is better than 140dB.

The LTC2414/LTC2418 communicate through a flexible 4-wire digital interface that is compatible with SPI and MICROWIRETM protocols.