LTC2400

The LTC®2400 is the industry's first No Latency ^TM ADC that combines automatic offset and full-scale calibration, an internal oscillator, a sinc4 digital filter, and serial I/O to yield a 24-bit ADC with 1.5VRMS input noise and singleshot conversion time architecture. It is the ideal A/D converter for temperature measurement and high effective resolution instrumentation applications, such as digital multimeters.

This application note contains six circuits that extend the LTC2400's capabilities using a number of low power differential-to-single-ended signal conditioning circuits. These circuits offer the customer a number of choices for conditioning differential input signals as low as 5mV to as high as ±2.5V, as well as operation on a single 5V or ±5V supplies. In each case, careful circuit design and implementation techniques were used to maintain or preserve the LTC2400's inherently high effective resolution. In some cases, circuit accuracies (uncalibrated) exceed 17 bits.