LTC2404/LTC2408 4-/8-channel 24-bit µPower No Latency ∆ΣTM ADCs with integrated oscillator, 4ppm INL and 0.3ppm RMS noise. They use delta-sigma technology and provide single cycle digital filter settling time (no latency delay) for multiplexed applications. The first conversion after the channel is changed is always valid. Through a single pin the LTC2404/ LTC2408 can be configured for better than 110dB rejec- tion at 50Hz or 60Hz ±2%, or can be driven by an external oscillator for a user defined rejection frequency in the range 1Hz to 120Hz. The internal oscillator requires no external frequency setting components. The converters accept any external reference voltage from 0.1V to VCC. With their extended input conversion range of –12.5% VREF to 112.5% VREF the LTC2404/LTC2408 smoothly resolve the offset and overrange problems of preceding sensors or signal conditioning circuits. The LTC2404/LTC2408 communicate through a flexible 4-wire digital interface which is compatible with SPI and MICROWIRE TM protocols.
The LTC2404 and LTC2408 are 4- or 8-channel, 24-bit analog-to-digital (A/D) converters designed for micropower applications. They utilize delta-sigma technology to provide single-cycle digital filter settling time with no latency delay, making them ideal for multiplexed sensor systems. The devices feature an integrated oscillator that requires no external components and offer a flexible digital interface compatible with both SPI and MICROWIRE protocols.
These converters operate on a single supply voltage ranging from 2.7V to 5.5V with low supply current in conversion mode (200µA) and sleep mode (20µA). Key specifications include better than 110dB rejection at 50Hz or 60Hz, an extended input range accommodating 12.5% overrange and underrange, and a reference input voltage range from 0.1V to VCC.
| Supply Voltage Range | 2.7V to 5.5V |
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No, the devices feature an internal oscillator that requires no external frequency setting components, though an external oscillator can be used to define a specific rejection frequency.
The device operates on a single supply ranging from 2.7V to 5.5V.
The typical supply current in conversion mode is 200 uA.