DESCRIPTION

The LTC®2411/LTC2411-1 are 2.7V to 5.5V micropower 24-bit differential ∆Σ analog-to-digital converters with an integrated oscillator, 2ppm INL and 0.29ppm RMS noise. They use delta-sigma technology and provide single cycle settling time for multiplexed applications. Through a single pin, the LTC2411 can be configured for better than 110dB differential mode rejection at 50Hz or 60Hz ±2%, and the LTC2411-1 can provide better than 87dB input differential mode rejection over the range of 49Hz to 61.2Hz, or they can be driven by an external oscillator for a user-defined rejection frequency. The LTC2411 and LTC2411-1 are identical when driven by an external oscillator. The internal oscillator requires no external frequency setting components.

FEATURES

■ 24-Bit ADC in an MS10 Package
■ Low Supply Current (200µA in Conversion Mode and 4µA in Autosleep Mode)
■ Differential Input and Differential Reference with GND to VCC Common Mode Range
■ 2ppm INL, No Missing Codes
■ 4ppm Full-Scale Error and 1ppm Offset
■ 0.29ppm Noise
■ No Latency: Digital Filter Settles in a Single Cycle. Each Conversion Is Accurate, Even After an Input Step
■ Single Supply 2.7V to 5.5V Operation
■ Internal Oscillator—No External Components Required
■ 110dB Min, Pin Selectable 50Hz/60Hz Notch Filter (LTC2411)
■ Simultaneous 50Hz/60Hz Rejection (LTC2411-1)

APPLICATIONS

■ Direct Sensor Digitizer
■ Weight Scales
■ Direct Temperature Measurement
■ Gas Analyzers
■ Strain Gauge Transducers
■ Instrumentation
■ Data Acquisition
■ Industrial Process Control
■ 6-Digit DVMs