Features

• Simultaneous 50Hz/60Hz Rejection (87dB Minimum)
• Differential Input and Differential Reference with GND to V_CC Common Mode Range
• 2ppm INL and No Missing Codes at 24 Bits
• 0.1ppm Offset and 2.5ppm Full-Scale Error
• 0.16ppm Noise
• No Latency: Digital Filter Settles in a Single Cycle.
• Internal Oscillator—No External Components Required
• 24-Bit ADC in Narrow SSOP-16 Package (SO-8 Footprint)
• Single Supply 2.7V to 5.5V Operation
• Low Supply Current (200µA) and Auto Shutdown
• Pin Compatible with LTC2410

Typical Application

Description

The LTC®2413 is a 2.7V to 5.5V simultaneous 50Hz/60Hz rejection micropower 24-bit differential Delta Sigma analog to digital converter with an integrated oscillator, 2ppm INL and 0.16ppm RMS noise. It uses delta-sigma technology and provides single cycle settling time for multiplexed applications. Through a single pin, the LTC2413 can be configured for better than 87dB input differential mode rejection over the range of 49Hz to 61.2Hz (50Hz and 60Hz ±2% simultaneously), 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 fullscale differential 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 anywhere within the GND to V_CC range of the LTC2413. The DC common mode input rejection is better than 140dB.

The LTC2413 communicates through a flexible 3-wire digital interface which is compatible with SPI and MICROWIRE™ protocols.